lab5 add

2024-01-12 18:23:52 +01:00 · 2024-01-12 18:23:52 +01:00 · e1dec3ee4e
parent 8362dc3c98
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--- a/5/Zadania
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+## Oświetlenie Phonga
+W trakcie tych zajęć zajmiemy się implementacją modelu oświetlenia Phonga. Na poprzednich zajęciach zbudowaliśmy układ słoneczny. Wykorzystamy go w trakcie tych zajęć. Jeżeli go zrobiłeś, to przekopiuj do `ex_5_1.hpp` kod z poprzednich zajęć. W przeciwnym wypadku wykorzystaj ten, który jest zaimplementowany w `ex_5_1.hpp`. W zadaniu będzie nam potrzebny statek latający przed kamerą, jak nie ma tego w Twojej scenie to skopiuj to z `ex_5_1.hpp`.
+ 
+
+## Zadanie - *diffuse*
+Oblicz we fragment shaderze oświetlenie obiektu przy użyciu modelu Phonga dla odbicia rozproszonego (*diffuse)
+1. Przekaż źródło światła. Na razie przyjmiemy kierunkowy model oświetlenia, dlatego źródło będzie opisane jako wektor kierunkowy: 
+
+- Prześlij do shadera fragmentów zmienna typu `uniform vec3` (nazwij ją np. `lightDir`), w której będzie się znajdować wektor kierunkowy.
+- Należy to zrobić podobnie do tego, jak przesyłany jest kolor. 
+- Jako kierunek światła wybierz dowolny wektor jednostkowy. (Możesz wziąć dowolny niezerowy wektor następnie go znormalizować).
+
+* Dodatkowo prześlij drugą zmienną `uniform vec3 lightColor`, w której umieścimy kolor światła. Prześlij tam wartości ze zmiennej `glm::vec3 lightColor`.
+
+2. Oblicz natężenie w shaderze fragmentów:
+- prześlij normalne z shadera fragmentów do shadera wierzchołków
+- znormalizuj wektor normalny przed użyciem go w obliczeniach (uśrednianie wektorów normalnych wierzchołków może spowodować, że przestaje one być jednostkowe).
+    
+- Natężenie to iloczyn skalarny wektora normalnego powierzchni i odwrotnego wektora kierunku padania światła. Skorzystaj z funkcji `dot`.
+    
+- Natężenie nie może być ujemne. Przytnij natężenie do zera przy użyciu: `x = max(x, 0.0)`
+3. Zastosuj obliczone natężenie, aby zmodyfikować kolor obiektu:
+- Przemnóż kolor RGB fragmentu przez obliczone natężenie i przez kolor światła z `lightColor`.
+
+## Zadanie - obsługa obrotów
+Dlaczego oświetlenie statku nie zmienia się podczas jego obracania?
+
+(Wektory normalne są w układzie lokalnym modelu, a wektor padania światła w układzie świata)
+
+Należy wykonać transformacje wektorów normalnych do przestrzeni świata:
+- Prześlij macierz modelu rysowanego obiektu (_model Matrix_) jako osobna zmienna do vertex shadera (`uniform mat4`).  
+- Przemnóż przez te macierz wektor normalny wierzchołka przed przesłaniem go do shadera fragmentów.
+- Współrzędna **w** dopisana do wektora przed mnożeniem przez macierz powinna być ustawiona na 0. Wynika to z tego, że w przypadku transformacji wektorów reprezentujących kierunki w przestrzeni, nie chcemy dokonywać translacji — np. wektor normalny do powierzchni zależy od orientacji obiektu, ale nie od jego pozycji (przesunięcia) w przestrzeni świata.
+    
+
+## Zadanie - *specular*
+Uzupełnił model o czynnik odbicia zwierciadlanego (*specular*). W tym celu:
+
+1. Potrzebny będzie wektor od rysowanego fragmentu do pozycji kamery:
+- Wyślij pozycje kamery (`cameraPos`) jako kolejna zmienna do fragment shadera.   
+- Podobnie jak wektory normalne prześlij z vertex do fragment shadera pozycje wierzchołków (`vertexPosition`) w przestrzeni świata (czyli pomnożone przez macierz **modelMatrix**). Pamiętaj, że tym razem wektory reprezentują punkty, a nie kierunki - współrzędna **w** przed mnożeniem musi być ustawiona na 1. W wyniku rasteryzacji otrzymamy w shaderze fragmentu jego pozycję (nazywaną pozycją fragmentu) 
+- Oblicz wektor **V** (_view direction_) jako znormalizowaną różnice pozycji kamery i pozycji fragmentu.  
+
+2. Oblicz natężenie światła odbitego we _fragment shaderze_:
+- Oblicz wektor kierunku odbicia światła **R** przy użyciu funkcji [`reflect`](https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/reflect.xhtml). Pamiętaj, żeby przesłać do funkcji odwrócony wektor kierunku światła.
+- Oblicz natężenie: iloczyn skalarny **V** i **R**, przycięty do zera ( `max(...,0.0)` ), a następnie podniesiony do wysokiej potęgi (np. 8, 50, 1000), która jest miara połyskliwości powierzchni.
+    
+3. Ustal ostateczny kolor piksela na `objectColor * diffuse + lightColor * specular`. Oznacza to najprostszy przypadek, gdy kolor światła odbitego jest biały.
+
+
+##  Zadanie - oświetlenie punktowe
+W układzie planetarnym obiektem oświetlającym powinno być słońce, dlatego zamień oświetlenie kierunkowe na punktowe:
+
+- Zamiast przesyłać (w `lightDir`) kierunek światła, prześlij pozycję słońca do fragment shadera (taką jak ustawiłeś w punkcie powyżej) jako uniform vec3 (nazwij go `lightPos`).
+- Oblicz kierunek światła odejmując od pozycji fragmentu pozycję światła, znormalizuj wynik. Zapisz wynik w zmiennej `lightDir`.  
+- Słońce będzie czarne, nie martw się tym, tylko spójrz na punkt następny.
+
+## Zadanie - shader słońca
+Źródło światła znajduje się wewnątrz kuli, która reprezentuje słońce, dlatego jest czarna. By to naprawić, utwórz osobny shader, który będzie odpowiadać za renderowanie słońca.
+
+Celem tego zadania jest stworzenie shadera (**shader_4_sun.vert**_ i **shader_4_sun.frag**), który będzie odpowiadał wyłącznie za rysowanie słońca. Poprzednie shadery (**shader_4_1.vert**_ i **shader_4_1.frag**) nadal mają rysować pozostałe obiekty. a) zainicjalizuj _program_ (shadery): - Pliki **shader_4_sun.vert** i **shader_4_sun.frag** są identyczne z 4_1** przed zmianami, będą punktem wyjścia dla _shadera_ słońca.
+
+1. Utwórz zmienną globalną `GLuint programSun` na adres shadera słońca. Stwórz _program_ za pomocą `shaderLoader.CreateProgram` analogicznie jak tworzy się `program` z **shader_4_1.vert** i **shader_4_1.frag** (parametry wejściowe to ścieżka do shadera wierzchołków i fragmentów **shader_4_sun.vert** i **shader_4_sun.frag**).
+
+2. W skomplikowanym projekcie różne typy obiektów rysuje się przy użyciu różnych shaderów, zate potrzebna jest w programie architektura, która na to pozwala. Ustaw odpowiedni _program_ (shadery) do rysowania słońca:
+- funkcja `drawObject` korzysta z globalnej zmiennej `program`, żeby wskazywać shadery do rysowania. Dodaj argument do funkcji, który będziesz przekazywać adres _programu_, który ma być wykorzystany do rysowania.
+- dodaj odpowiedni _program_ w wywołaniach `drawObject`.
+
+## Osłabienie światła, tone mapping
+### Zadanie - Osłabienie światła (attenuation)
+Światło pochodzące z punktowego źródła traci na sile wraz z dystansem. Wynika to z tego, że rozprasza się na większą powierzchnię. 
+Dodaj ten efekt do shadera. Zamiast brać kolor światła bezpośrednio, podziel go przez kwadrat dystansu od źródła świata.
+
+#### Tone mapping 
+Przez obecną zmianę scena stała się ciemna. Wymaga to od nas zmiany 'koloru' światła na wartości dużo większe niż do tej pory. Jeśli teraz to zrobimy i przesadzimy w drugą stronę, otrzymamy efekt prześwietlenia. Wynika to z ograniczenia zakresu kolorów do $[0,1]$ (obsługą wyższych wartości nazywamy HDR). Rozwiązaniem jest pracowanie na wartościach powyżej 1 wykorzystanie *tone mappingu* do przeniesienia ich w zakres  $[0,1]$. Istnieje wiele wzorów, które są wykorzystywane do tego, jeden z nich to:
+
+$$C_{mapped} = 1-e^{-C * E},$$
+gdzie C to kolor sceny a E to parametr ekspozycji (z zakresu $(0,\infty)$, który może być dostosowany w zależności od jasności. 
+### Zadanie - Tone mapping*
+Zwiększ siłę słońca przynajmniej stukrotnie. Zaimplementuj powyższą metodę tone mappingu i dodaj możliwość sterowania ekspozycją za pomocą klawiszy 1 i 2. 
+
+### Zadanie*
+Dodaj drugie źródło oświetlenia w postaci reflektora statku. Reflektor świeci tylko w określonym stożku,dlatego oprócz pozycji `spotPos` posiada również kierunek `spotDir` i kąt świecenia $\phi$. Po obliczeniu dla niego `lightDir` należy sprawdzić, czy iloczyn skalarny pomiędzy `lightDir` a `spodDir` jest większy niż  $\cos\phi$ . Jeżeli nie jest, to stożek nie świeci w tym miejscu. Można ułatwić sobie implementację wielu źródeł światła poprzez przeniesienie obliczeń oświetlenia do funkcji, która przyjmuje kierunek światła i siłę naświetlenie. 
+
+	Zwróć uwagę, że SpotDir to co innego niż light Dir w poprzednich zadaniach
+![](./img/spotlight.png)
+## Zmień shader słońca na bardziej realistyczny.
+### Zadanie*
+
+Na poniższym obrazku jest zdjęcie słońca. Jest ono ciemniejsze na brzegach spróbuj uzyskać podobny efekt. Przydadzą się wektory z poprzednich punktów jak wektor normalny i wektor **V**.
+
+![](./img/sun.png)
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--- a/5/img/2.png
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--- a/5/img/384px-PerlinNoiseDotProducts.png
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--- a/5/img/5.webp
+++ b/5/img/5.webp
--- a/5/img/6.webp
+++ b/5/img/6.webp
--- a/5/img/7.webp
+++ b/5/img/7.webp
--- a/5/img/8.webp
+++ b/5/img/8.webp
--- a/5/img/Figure_1.eps
+++ b/5/img/Figure_1.eps
--- a/5/img/PerlinNoiseDotProducts.png
+++ b/5/img/PerlinNoiseDotProducts.png
--- a/5/img/PerlinNoiseGradientGrid.png
+++ b/5/img/PerlinNoiseGradientGrid.png
--- a/5/img/PerlinNoiseInterpolated.png
+++ b/5/img/PerlinNoiseInterpolated.png
--- a/5/img/blending1.webp
+++ b/5/img/blending1.webp
--- a/5/img/camera.jpg
+++ b/5/img/camera.jpg
--- a/5/img/capture.webm
+++ b/5/img/capture.webm
--- a/5/img/coordinate_systems.jpg
+++ b/5/img/coordinate_systems.jpg
--- a/5/img/cubemaps_sampling.png
+++ b/5/img/cubemaps_sampling.png
--- a/5/img/gamma_correction_brightness.png
+++ b/5/img/gamma_correction_brightness.png
--- a/5/img/lighting_result.png
+++ b/5/img/lighting_result.png
--- a/5/img/noise_examples.jpg
+++ b/5/img/noise_examples.jpg
--- a/5/img/shadow_mapping_projection.png
+++ b/5/img/shadow_mapping_projection.png
--- a/5/img/shadows1.bmp
+++ b/5/img/shadows1.bmp
--- a/5/img/spotlight.png
+++ b/5/img/spotlight.png
--- a/5/img/stride_offest.jpg
+++ b/5/img/stride_offest.jpg
--- a/5/img/stride_offest_2_2.jpg
+++ b/5/img/stride_offest_2_2.jpg
--- a/5/img/struktura.jpg
+++ b/5/img/struktura.jpg
--- a/5/img/sun.png
+++ b/5/img/sun.png
--- a/5/img/textures.png
+++ b/5/img/textures.png
--- a/5/img/z_depth_graph.jpg
+++ b/5/img/z_depth_graph.jpg
--- a/5/img/z_depth_graph2.jpg
+++ b/5/img/z_depth_graph2.jpg
--- a/5/shaders/shader_5_1.frag
+++ b/5/shaders/shader_5_1.frag
@ -0,0 +1,38 @@
+#version 430 core
+
+uniform vec3 color;
+out vec4 outColor;
+
+uniform vec3 lightColor;
+uniform vec3 cameraPos;
+
+uniform vec3 lightPos;
+in vec3 FragNormal;
+in vec4 vertexPosWorld;
+
+uniform float exposition;
+
+void main()
+{
+	vec3 viewDir = normalize(cameraPos - vertexPosWorld.xyz);
+    vec3 normalizedNormal = normalize(FragNormal);
+
+    vec3 lightDir = normalize(lightPos - vertexPosWorld.xyz);
+   
+    float diffuse = max(dot(normalizedNormal, lightDir), 0.0);
+
+  
+    vec3 normalizedViewDir = normalize(viewDir);
+    vec3 reflectDir = reflect(-normalize(lightDir), normalizedNormal);
+    float specular = pow(max(dot(normalizedViewDir, reflectDir), 0.0), 8.0);
+
+    //zad_6
+    float distance = length(lightPos - vertexPosWorld.xyz);
+    vec3 newLightColor = lightColor / distance;
+    vec3 finalColor = newLightColor * (color * diffuse+specular);
+
+    finalColor = 1.0 - exp(-finalColor * exposition);
+
+    outColor = vec4(finalColor, 1.0);
+	
+}
--- a/5/shaders/shader_5_1.vert
+++ b/5/shaders/shader_5_1.vert
@ -0,0 +1,27 @@
+#version 430 core
+
+layout(location = 0) in vec3 vertexPosition;
+layout(location = 1) in vec3 vertexNormal;
+layout(location = 2) in vec2 vertexTexCoord;
+
+uniform mat4 transformation;
+
+out vec3 FragNormal;
+uniform mat4 modelMatrix;
+uniform vec3 cameraPos;
+
+out vec3 viewDir;
+out vec4 vertexPosWorld;
+
+void main()
+{
+	gl_Position = transformation * vec4(vertexPosition, 1.0);
+	
+	vec4 transformedNormal = modelMatrix * vec4(vertexNormal, 0.0);
+    FragNormal = normalize(transformedNormal.xyz);
+
+	vertexPosWorld = modelMatrix * vec4(vertexPosition, 1.0);
+
+	
+
+}
--- a/5/shaders/shader_5_sun.frag
+++ b/5/shaders/shader_5_sun.frag
@ -0,0 +1,24 @@
+#version 430 core
+
+uniform vec3 color;
+
+in vec3 interpNormal;
+
+out vec4 out_color;
+
+void main()
+{
+	
+    float rimIntensity = 0.5;  // intensywnoœæ
+    vec3 rimColor = vec3(1.0, 0.0, 0.0);  // kolor rim
+    float rim = dot(normalize(interpNormal), normalize(vec3(0.0, 0.0, 1.0)));  // wektor (0, 0, 1) ¿eby na krawêdziach
+    rim = 1 - pow(rim, 2);  // jak szeroki jest ten rim
+
+    vec3 finalColor = color;
+
+    finalColor = mix(color, rimColor, rimIntensity * rim);
+
+
+	out_color = vec4(finalColor, 1.0);
+
+}
--- a/5/shaders/shader_5_sun.vert
+++ b/5/shaders/shader_5_sun.vert
@ -0,0 +1,15 @@
+#version 430 core
+
+layout(location = 0) in vec3 vertexPosition;
+layout(location = 1) in vec3 vertexNormal;
+layout(location = 2) in vec2 vertexTexCoord;
+
+
+uniform mat4 transformation;
+out vec3 interpNormal;
+
+void main()
+{
+	gl_Position = transformation * vec4(vertexPosition, 1.0);
+	interpNormal = normalize(transformation * vec4(vertexNormal, 0.0)).xyz;
+}
--- a/5/src/Box.cpp
+++ b/5/src/Box.cpp
@ -0,0 +1,55 @@
+
+
+// dane 36 wierzcholkow i kolorow opisujace model pudelka
+const float box[] = {
+
+	//  points							colors
+		0.25f, 0.25f, 0.75f, 1.0f,		0.0f, 0.0f, 1.0f, 1.0f,
+		0.25f, -0.25f, 0.75f, 1.0f,		0.0f, 0.0f, 1.0f, 1.0f,
+		-0.25f, 0.25f, 0.75f, 1.0f,		0.0f, 0.0f, 1.0f, 1.0f,
+
+		0.25f, -0.25f, 0.75f, 1.0f,		0.0f, 0.0f, 1.0f, 1.0f,
+		-0.25f, -0.25f, 0.75f, 1.0f,	0.0f, 0.0f, 1.0f, 1.0f,
+		-0.25f, 0.25f, 0.75f, 1.0f,		0.0f, 0.0f, 1.0f, 1.0f,
+
+		0.25f, 0.25f, -0.75f, 1.0f,		0.8f, 0.8f, 0.8f, 1.0f,
+		-0.25f, 0.25f, -0.75f, 1.0f,	0.8f, 0.8f, 0.8f, 1.0f,
+		0.25f, -0.25f, -0.75f, 1.0f,	0.8f, 0.8f, 0.8f, 1.0f,
+
+		0.25f, -0.25f, -0.75f, 1.0f,	0.8f, 0.8f, 0.8f, 1.0f,
+		-0.25f, 0.25f, -0.75f, 1.0f,	0.8f, 0.8f, 0.8f, 1.0f,
+		-0.25f, -0.25f, -0.75f, 1.0f,	0.8f, 0.8f, 0.8f, 1.0f,
+
+		-0.25f, 0.25f, 0.75f, 1.0f,		0.0f, 1.0f, 0.0f, 1.0f,
+		-0.25f, -0.25f, 0.75f, 1.0f,	0.0f, 1.0f, 0.0f, 1.0f,
+		-0.25f, -0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 0.0f, 1.0f,
+
+		-0.25f, 0.25f, 0.75f, 1.0f,		0.0f, 1.0f, 0.0f, 1.0f,
+		-0.25f, -0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 0.0f, 1.0f,
+		-0.25f, 0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 0.0f, 1.0f,
+
+		0.25f, 0.25f, 0.75f, 1.0f,		0.5f, 0.5f, 0.0f, 1.0f,
+		0.25f, -0.25f, -0.75f, 1.0f,	0.5f, 0.5f, 0.0f, 1.0f,
+		0.25f, -0.25f, 0.75f, 1.0f,		0.5f, 0.5f, 0.0f, 1.0f,
+
+		0.25f, 0.25f, 0.75f, 1.0f,		0.5f, 0.5f, 0.0f, 1.0f,
+		0.25f, 0.25f, -0.75f, 1.0f,		0.5f, 0.5f, 0.0f, 1.0f,
+		0.25f, -0.25f, -0.75f, 1.0f,	0.5f, 0.5f, 0.0f, 1.0f,
+
+		0.25f, 0.25f, -0.75f, 1.0f,		1.0f, 0.0f, 0.0f, 1.0f,
+		0.25f, 0.25f, 0.75f, 1.0f,		1.0f, 0.0f, 0.0f, 1.0f,
+		-0.25f, 0.25f, 0.75f, 1.0f,		1.0f, 0.0f, 0.0f, 1.0f,
+
+		0.25f, 0.25f, -0.75f, 1.0f,		1.0f, 0.0f, 0.0f, 1.0f,
+		-0.25f, 0.25f, 0.75f, 1.0f,		1.0f, 0.0f, 0.0f, 1.0f,
+		-0.25f, 0.25f, -0.75f, 1.0f,	1.0f, 0.0f, 0.0f, 1.0f,
+
+		0.25f, -0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 1.0f, 1.0f,
+		-0.25f, -0.25f, 0.75f, 1.0f,	0.0f, 1.0f, 1.0f, 1.0f,
+		0.25f, -0.25f, 0.75f, 1.0f,		0.0f, 1.0f, 1.0f, 1.0f,
+
+		0.25f, -0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 1.0f, 1.0f,
+		-0.25f, -0.25f, -0.75f, 1.0f,	0.0f, 1.0f, 1.0f, 1.0f,
+		-0.25f, -0.25f, 0.75f, 1.0f,	0.0f, 1.0f, 1.0f, 1.0f,
+};
+
--- a/5/src/Camera.cpp
+++ b/5/src/Camera.cpp
@ -0,0 +1,31 @@
+#include "Camera.h"
+
+glm::mat4 Core::createPerspectiveMatrix(float zNear, float zFar, float frustumScale)
+{
+	glm::mat4 perspective;
+    perspective[0][0] = 1.f;
+	perspective[1][1] = frustumScale;
+	perspective[2][2] = (zFar + zNear) / (zNear - zFar);
+	perspective[3][2] = (2 * zFar * zNear) / (zNear - zFar);
+	perspective[2][3] = -1;
+	perspective[3][3] = 0;
+
+	return perspective;
+}
+
+glm::mat4 Core::createViewMatrix( glm::vec3 position, glm::vec3 forward, glm::vec3 up )
+{
+	glm::vec3 side = glm::cross(forward, up);
+
+	// Trzeba pamietac o minusie przy ustawianiu osi Z kamery.
+	// Wynika to z tego, ze standardowa macierz perspektywiczna zaklada, ze "z przodu" jest ujemna (a nie dodatnia) czesc osi Z.
+	glm::mat4 cameraRotation;
+	cameraRotation[0][0] = side.x; cameraRotation[1][0] = side.y; cameraRotation[2][0] = side.z;
+	cameraRotation[0][1] = up.x; cameraRotation[1][1] = up.y; cameraRotation[2][1] = up.z;
+	cameraRotation[0][2] = -forward.x; cameraRotation[1][2] = -forward.y; cameraRotation[2][2] = -forward.z;
+
+	glm::mat4 cameraTranslation;
+	cameraTranslation[3] = glm::vec4(-position, 1.0f);
+
+	return cameraRotation * cameraTranslation;
+}
--- a/5/src/Camera.h
+++ b/5/src/Camera.h
@ -0,0 +1,14 @@
+#pragma once
+
+#include "glm.hpp"
+
+namespace Core
+{
+	glm::mat4 createPerspectiveMatrix(float zNear = 0.1f, float zFar = 100.0f, float frustumScale = 1.f);
+
+	// position - pozycja kamery
+	// forward - wektor "do przodu" kamery (jednostkowy)
+	// up - wektor "w gore" kamery (jednostkowy)
+	// up i forward musza byc ortogonalne!
+	glm::mat4 createViewMatrix(glm::vec3 position, glm::vec3 forward, glm::vec3 up);
+}
--- a/5/src/Render_Utils.cpp
+++ b/5/src/Render_Utils.cpp
@ -0,0 +1,128 @@
+#include "Render_Utils.h"
+
+#include <algorithm>
+
+#include "glew.h"
+#include "freeglut.h"
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+
+
+
+void Core::RenderContext::initFromAssimpMesh(aiMesh* mesh) {
+    vertexArray = 0;
+    vertexBuffer = 0;
+    vertexIndexBuffer = 0;
+
+    std::vector<float> textureCoord;
+    std::vector<unsigned int> indices;
+    //tex coord must be converted to 2d vecs
+    for (unsigned int i = 0; i < mesh->mNumVertices; i++)
+    {
+        if (mesh->mTextureCoords[0] != nullptr) {
+            textureCoord.push_back(mesh->mTextureCoords[0][i].x);
+            textureCoord.push_back(mesh->mTextureCoords[0][i].y);
+        }
+        else {
+            textureCoord.push_back(0.0f);
+            textureCoord.push_back(0.0f);
+        }
+    }
+    if (mesh->mTextureCoords[0] == nullptr) {
+        std::cout << "no uv coords\n";
+    }
+    for (unsigned int i = 0; i < mesh->mNumFaces; i++)
+    {
+        aiFace face = mesh->mFaces[i];
+        // retrieve all indices of the face and store them in the indices vector
+        for (unsigned int j = 0; j < face.mNumIndices; j++)
+            indices.push_back(face.mIndices[j]);
+    }
+
+    unsigned int vertexDataBufferSize = sizeof(float) * mesh->mNumVertices * 3;
+    unsigned int vertexNormalBufferSize = sizeof(float) * mesh->mNumVertices * 3;
+    unsigned int vertexTexBufferSize = sizeof(float) * mesh->mNumVertices * 2;
+    unsigned int vertexTangentBufferSize = sizeof(float) * mesh->mNumVertices * 3;
+    unsigned int vertexBiTangentBufferSize = sizeof(float) * mesh->mNumVertices * 3;
+
+    unsigned int vertexElementBufferSize = sizeof(unsigned int) * indices.size();
+    size = indices.size();
+
+    glGenVertexArrays(1, &vertexArray);
+    glBindVertexArray(vertexArray);
+
+
+    glGenBuffers(1, &vertexIndexBuffer);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vertexIndexBuffer);
+    glBufferData(GL_ELEMENT_ARRAY_BUFFER, vertexElementBufferSize, &indices[0], GL_STATIC_DRAW);
+
+    glGenBuffers(1, &vertexBuffer);
+    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
+    //std::cout << vertexBuffer;
+    glEnableVertexAttribArray(0);
+    glEnableVertexAttribArray(1);
+    glEnableVertexAttribArray(2);
+    glEnableVertexAttribArray(3);
+    glEnableVertexAttribArray(4);
+
+    glBufferData(GL_ARRAY_BUFFER, vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize + vertexTangentBufferSize + vertexBiTangentBufferSize, NULL, GL_STATIC_DRAW);
+
+    glBufferSubData(GL_ARRAY_BUFFER, 0, vertexDataBufferSize, mesh->mVertices);
+
+    glBufferSubData(GL_ARRAY_BUFFER, vertexDataBufferSize, vertexNormalBufferSize, mesh->mNormals);
+
+    glBufferSubData(GL_ARRAY_BUFFER, vertexDataBufferSize + vertexNormalBufferSize, vertexTexBufferSize, &textureCoord[0]);
+
+    glBufferSubData(GL_ARRAY_BUFFER, vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize, vertexTangentBufferSize, mesh->mTangents);
+
+    glBufferSubData(GL_ARRAY_BUFFER, vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize + vertexTangentBufferSize, vertexBiTangentBufferSize, mesh->mBitangents);
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (void*)(0));
+    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (void*)(vertexDataBufferSize));
+    glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 0, (void*)(vertexNormalBufferSize + vertexDataBufferSize));
+    glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, 0, (void*)(vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize));
+    glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, 0, (void*)(vertexDataBufferSize + vertexNormalBufferSize + vertexTexBufferSize + vertexTangentBufferSize));
+
+}
+
+void Core::DrawVertexArray(const float * vertexArray, int numVertices, int elementSize )
+{
+	glVertexAttribPointer(0, elementSize, GL_FLOAT, false, 0, vertexArray);
+	glEnableVertexAttribArray(0);
+
+	glDrawArrays(GL_TRIANGLES, 0, numVertices);
+}
+
+void Core::DrawVertexArrayIndexed( const float * vertexArray, const int * indexArray, int numIndexes, int elementSize )
+{
+	glVertexAttribPointer(0, elementSize, GL_FLOAT, false, 0, vertexArray);
+	glEnableVertexAttribArray(0);
+
+	glDrawElements(GL_TRIANGLES, numIndexes, GL_UNSIGNED_INT, indexArray);
+}
+
+
+void Core::DrawVertexArray( const VertexData & data )
+{
+	int numAttribs = std::min(VertexData::MAX_ATTRIBS, data.NumActiveAttribs);
+	for(int i = 0; i < numAttribs; i++)
+	{
+		glVertexAttribPointer(i, data.Attribs[i].Size, GL_FLOAT, false, 0, data.Attribs[i].Pointer);
+		glEnableVertexAttribArray(i);
+	}
+	glDrawArrays(GL_TRIANGLES, 0, data.NumVertices);
+}
+
+void Core::DrawContext(Core::RenderContext& context)
+{
+
+	glBindVertexArray(context.vertexArray);
+	glDrawElements(
+		GL_TRIANGLES,      // mode
+		context.size,    // count
+		GL_UNSIGNED_INT,   // type
+		(void*)0           // element array buffer offset
+	);
+	glBindVertexArray(0);
+}
--- a/5/src/Render_Utils.h
+++ b/5/src/Render_Utils.h
@ -0,0 +1,72 @@
+#pragma once
+#include "glm.hpp"
+#include "glew.h"
+#include "objload.h"
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+
+#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+
+namespace Core
+{
+	struct RenderContext
+    {
+		GLuint vertexArray;
+		GLuint vertexBuffer;
+		GLuint vertexIndexBuffer;
+		int size = 0;
+
+        void initFromOBJ(obj::Model& model);
+
+		void initFromAssimpMesh(aiMesh* mesh);
+	};
+
+	// vertexArray - jednowymiarowa tablica zawierajaca wartosci opisujace pozycje kolejnych wierzcholkow w jednym ciagu (x1, y1, z1, w1, x2, y2, z2, w2, ...)
+	// numVertices - liczba wierzcholkow do narysowania
+	// elementSize - liczba wartosci opisujacych pojedynczy wierzcholek (np. 3 gdy wierzcholek opisany jest trojka (x, y, z))
+	void DrawVertexArray(const float * vertexArray, int numVertices, int elementSize);
+
+	// indexArray - jednowymiarowa tablica zawierajaca indeksy wierzcholkow kolejnych trojkatow w jednym ciagu (t1_i1, t1_i2, t1_i3, t2_i1, t2_i2, t2_i3, ...)
+	// numIndexes - liczba indeksow w tablicy indexArray
+	void DrawVertexArrayIndexed(const float * vertexArray, const int * indexArray, int numIndexes, int elementSize);
+
+
+	struct VertexAttribute
+	{
+		const void * Pointer;
+		int Size;
+	};
+
+	struct VertexData
+	{
+		static const int MAX_ATTRIBS = 8;
+		VertexAttribute Attribs[MAX_ATTRIBS];
+		int NumActiveAttribs;
+		int NumVertices;
+	};
+
+	// Ta funkcja sluzy do rysowania trojkatow, ktorych wierzcholki moga byc opisane wiecej niz jednym atrybutem.
+	// Funkcja przyjmuje jako parametr strukture, w ktorej nalezy zawrzec wszystkie potrzebne dane.
+	// 
+	// Przykladowe wywolanie funkcji - narysowanie trojkata jak na pierwszych zajeciach:
+	/*
+	
+	const float vertices[] = {
+		0.25f,  0.25f, 0.0f, 1.0f,
+		0.25f, -0.25f, 0.0f, 1.0f,
+		-0.25f, -0.25f, 0.0f, 1.0f
+	};
+	
+	Core::VertexData vertexData;
+	vertexData.NumActiveAttribs = 1;			// Liczba uzywanych atrybutow wierzcholka
+	vertexData.Attribs[0].Pointer = vertices;	// Wskaznik na dane zerowego atrybutu
+	vertexData.Attribs[0].Size = 4;				// Wielkosc zerowego atrybutu (ilosc liczb opisujacych ten atrybut w pojedynczym wierzcholku)
+	vertexData.NumVertices = 3;					// Liczba wierzcholkow do narysowania
+	Core::DrawVertexArray(vertexData);
+
+	*/
+	void DrawVertexArray(const VertexData & data);
+
+	void DrawContext(RenderContext& context);
+}
--- a/5/src/SOIL/SOIL.c
+++ b/5/src/SOIL/SOIL.c
--- a/5/src/SOIL/SOIL.h
+++ b/5/src/SOIL/SOIL.h
@ -0,0 +1,433 @@
+/**
+	@mainpage SOIL
+
+	Jonathan Dummer
+	2007-07-26-10.36
+
+	Simple OpenGL Image Library
+
+	A tiny c library for uploading images as
+	textures into OpenGL.  Also saving and
+	loading of images is supported.
+
+	I'm using Sean's Tool Box image loader as a base:
+	http://www.nothings.org/
+
+	I'm upgrading it to load TGA and DDS files, and a direct
+	path for loading DDS files straight into OpenGL textures,
+	when applicable.
+
+	Image Formats:
+	- BMP		load & save
+	- TGA		load & save
+	- DDS		load & save
+	- PNG		load
+	- JPG		load
+
+	OpenGL Texture Features:
+	- resample to power-of-two sizes
+	- MIPmap generation
+	- compressed texture S3TC formats (if supported)
+	- can pre-multiply alpha for you, for better compositing
+	- can flip image about the y-axis (except pre-compressed DDS files)
+
+	Thanks to:
+	* Sean Barret - for the awesome stb_image
+	* Dan Venkitachalam - for finding some non-compliant DDS files, and patching some explicit casts
+	* everybody at gamedev.net
+**/
+
+#ifndef HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY
+#define HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+	The format of images that may be loaded (force_channels).
+	SOIL_LOAD_AUTO leaves the image in whatever format it was found.
+	SOIL_LOAD_L forces the image to load as Luminous (greyscale)
+	SOIL_LOAD_LA forces the image to load as Luminous with Alpha
+	SOIL_LOAD_RGB forces the image to load as Red Green Blue
+	SOIL_LOAD_RGBA forces the image to load as Red Green Blue Alpha
+**/
+enum
+{
+	SOIL_LOAD_AUTO = 0,
+	SOIL_LOAD_L = 1,
+	SOIL_LOAD_LA = 2,
+	SOIL_LOAD_RGB = 3,
+	SOIL_LOAD_RGBA = 4
+};
+
+/**
+	Passed in as reuse_texture_ID, will cause SOIL to
+	register a new texture ID using glGenTextures().
+	If the value passed into reuse_texture_ID > 0 then
+	SOIL will just re-use that texture ID (great for
+	reloading image assets in-game!)
+**/
+enum
+{
+	SOIL_CREATE_NEW_ID = 0
+};
+
+/**
+	flags you can pass into SOIL_load_OGL_texture()
+	and SOIL_create_OGL_texture().
+	(note that if SOIL_FLAG_DDS_LOAD_DIRECT is used
+	the rest of the flags with the exception of
+	SOIL_FLAG_TEXTURE_REPEATS will be ignored while
+	loading already-compressed DDS files.)
+
+	SOIL_FLAG_POWER_OF_TWO: force the image to be POT
+	SOIL_FLAG_MIPMAPS: generate mipmaps for the texture
+	SOIL_FLAG_TEXTURE_REPEATS: otherwise will clamp
+	SOIL_FLAG_MULTIPLY_ALPHA: for using (GL_ONE,GL_ONE_MINUS_SRC_ALPHA) blending
+	SOIL_FLAG_INVERT_Y: flip the image vertically
+	SOIL_FLAG_COMPRESS_TO_DXT: if the card can display them, will convert RGB to DXT1, RGBA to DXT5
+	SOIL_FLAG_DDS_LOAD_DIRECT: will load DDS files directly without _ANY_ additional processing
+	SOIL_FLAG_NTSC_SAFE_RGB: clamps RGB components to the range [16,235]
+	SOIL_FLAG_CoCg_Y: Google YCoCg; RGB=>CoYCg, RGBA=>CoCgAY
+	SOIL_FLAG_TEXTURE_RECTANGE: uses ARB_texture_rectangle ; pixel indexed & no repeat or MIPmaps or cubemaps
+**/
+enum
+{
+	SOIL_FLAG_POWER_OF_TWO = 1,
+	SOIL_FLAG_MIPMAPS = 2,
+	SOIL_FLAG_TEXTURE_REPEATS = 4,
+	SOIL_FLAG_MULTIPLY_ALPHA = 8,
+	SOIL_FLAG_INVERT_Y = 16,
+	SOIL_FLAG_COMPRESS_TO_DXT = 32,
+	SOIL_FLAG_DDS_LOAD_DIRECT = 64,
+	SOIL_FLAG_NTSC_SAFE_RGB = 128,
+	SOIL_FLAG_CoCg_Y = 256,
+	SOIL_FLAG_TEXTURE_RECTANGLE = 512
+};
+
+/**
+	The types of images that may be saved.
+	(TGA supports uncompressed RGB / RGBA)
+	(BMP supports uncompressed RGB)
+	(DDS supports DXT1 and DXT5)
+**/
+enum
+{
+	SOIL_SAVE_TYPE_TGA = 0,
+	SOIL_SAVE_TYPE_BMP = 1,
+	SOIL_SAVE_TYPE_DDS = 2
+};
+
+/**
+	Defines the order of faces in a DDS cubemap.
+	I recommend that you use the same order in single
+	image cubemap files, so they will be interchangeable
+	with DDS cubemaps when using SOIL.
+**/
+#define SOIL_DDS_CUBEMAP_FACE_ORDER "EWUDNS"
+
+/**
+	The types of internal fake HDR representations
+
+	SOIL_HDR_RGBE:		RGB * pow( 2.0, A - 128.0 )
+	SOIL_HDR_RGBdivA:	RGB / A
+	SOIL_HDR_RGBdivA2:	RGB / (A*A)
+**/
+enum
+{
+	SOIL_HDR_RGBE = 0,
+	SOIL_HDR_RGBdivA = 1,
+	SOIL_HDR_RGBdivA2 = 2
+};
+
+/**
+	Loads an image from disk into an OpenGL texture.
+	\param filename the name of the file to upload as a texture
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_texture
+	(
+		const char *filename,
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads 6 images from disk into an OpenGL cubemap texture.
+	\param x_pos_file the name of the file to upload as the +x cube face
+	\param x_neg_file the name of the file to upload as the -x cube face
+	\param y_pos_file the name of the file to upload as the +y cube face
+	\param y_neg_file the name of the file to upload as the -y cube face
+	\param z_pos_file the name of the file to upload as the +z cube face
+	\param z_neg_file the name of the file to upload as the -z cube face
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_cubemap
+	(
+		const char *x_pos_file,
+		const char *x_neg_file,
+		const char *y_pos_file,
+		const char *y_neg_file,
+		const char *z_pos_file,
+		const char *z_neg_file,
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads 1 image from disk and splits it into an OpenGL cubemap texture.
+	\param filename the name of the file to upload as a texture
+	\param face_order the order of the faces in the file, any combination of NSWEUD, for North, South, Up, etc.
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_single_cubemap
+	(
+		const char *filename,
+		const char face_order[6],
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads an HDR image from disk into an OpenGL texture.
+	\param filename the name of the file to upload as a texture
+	\param fake_HDR_format SOIL_HDR_RGBE, SOIL_HDR_RGBdivA, SOIL_HDR_RGBdivA2
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_HDR_texture
+	(
+		const char *filename,
+		int fake_HDR_format,
+		int rescale_to_max,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads an image from RAM into an OpenGL texture.
+	\param buffer the image data in RAM just as if it were still in a file
+	\param buffer_length the size of the buffer in bytes
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_texture_from_memory
+	(
+		const unsigned char *const buffer,
+		int buffer_length,
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads 6 images from memory into an OpenGL cubemap texture.
+	\param x_pos_buffer the image data in RAM to upload as the +x cube face
+	\param x_pos_buffer_length the size of the above buffer
+	\param x_neg_buffer the image data in RAM to upload as the +x cube face
+	\param x_neg_buffer_length the size of the above buffer
+	\param y_pos_buffer the image data in RAM to upload as the +x cube face
+	\param y_pos_buffer_length the size of the above buffer
+	\param y_neg_buffer the image data in RAM to upload as the +x cube face
+	\param y_neg_buffer_length the size of the above buffer
+	\param z_pos_buffer the image data in RAM to upload as the +x cube face
+	\param z_pos_buffer_length the size of the above buffer
+	\param z_neg_buffer the image data in RAM to upload as the +x cube face
+	\param z_neg_buffer_length the size of the above buffer
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_cubemap_from_memory
+	(
+		const unsigned char *const x_pos_buffer,
+		int x_pos_buffer_length,
+		const unsigned char *const x_neg_buffer,
+		int x_neg_buffer_length,
+		const unsigned char *const y_pos_buffer,
+		int y_pos_buffer_length,
+		const unsigned char *const y_neg_buffer,
+		int y_neg_buffer_length,
+		const unsigned char *const z_pos_buffer,
+		int z_pos_buffer_length,
+		const unsigned char *const z_neg_buffer,
+		int z_neg_buffer_length,
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Loads 1 image from RAM and splits it into an OpenGL cubemap texture.
+	\param buffer the image data in RAM just as if it were still in a file
+	\param buffer_length the size of the buffer in bytes
+	\param face_order the order of the faces in the file, any combination of NSWEUD, for North, South, Up, etc.
+	\param force_channels 0-image format, 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_load_OGL_single_cubemap_from_memory
+	(
+		const unsigned char *const buffer,
+		int buffer_length,
+		const char face_order[6],
+		int force_channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Creates a 2D OpenGL texture from raw image data.  Note that the raw data is
+	_NOT_ freed after the upload (so the user can load various versions).
+	\param data the raw data to be uploaded as an OpenGL texture
+	\param width the width of the image in pixels
+	\param height the height of the image in pixels
+	\param channels the number of channels: 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_create_OGL_texture
+	(
+		const unsigned char *const data,
+		int width, int height, int channels,
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Creates an OpenGL cubemap texture by splitting up 1 image into 6 parts.
+	\param data the raw data to be uploaded as an OpenGL texture
+	\param width the width of the image in pixels
+	\param height the height of the image in pixels
+	\param channels the number of channels: 1-luminous, 2-luminous/alpha, 3-RGB, 4-RGBA
+	\param face_order the order of the faces in the file, and combination of NSWEUD, for North, South, Up, etc.
+	\param reuse_texture_ID 0-generate a new texture ID, otherwise reuse the texture ID (overwriting the old texture)
+	\param flags can be any of SOIL_FLAG_POWER_OF_TWO | SOIL_FLAG_MIPMAPS | SOIL_FLAG_TEXTURE_REPEATS | SOIL_FLAG_MULTIPLY_ALPHA | SOIL_FLAG_INVERT_Y | SOIL_FLAG_COMPRESS_TO_DXT | SOIL_FLAG_DDS_LOAD_DIRECT
+	\return 0-failed, otherwise returns the OpenGL texture handle
+**/
+unsigned int
+	SOIL_create_OGL_single_cubemap
+	(
+		const unsigned char *const data,
+		int width, int height, int channels,
+		const char face_order[6],
+		unsigned int reuse_texture_ID,
+		unsigned int flags
+	);
+
+/**
+	Captures the OpenGL window (RGB) and saves it to disk
+	\return 0 if it failed, otherwise returns 1
+**/
+int
+	SOIL_save_screenshot
+	(
+		const char *filename,
+		int image_type,
+		int x, int y,
+		int width, int height
+	);
+
+/**
+	Loads an image from disk into an array of unsigned chars.
+	Note that *channels return the original channel count of the
+	image.  If force_channels was other than SOIL_LOAD_AUTO,
+	the resulting image has force_channels, but *channels may be
+	different (if the original image had a different channel
+	count).
+	\return 0 if failed, otherwise returns 1
+**/
+unsigned char*
+	SOIL_load_image
+	(
+		const char *filename,
+		int *width, int *height, int *channels,
+		int force_channels
+	);
+
+/**
+	Loads an image from memory into an array of unsigned chars.
+	Note that *channels return the original channel count of the
+	image.  If force_channels was other than SOIL_LOAD_AUTO,
+	the resulting image has force_channels, but *channels may be
+	different (if the original image had a different channel
+	count).
+	\return 0 if failed, otherwise returns 1
+**/
+unsigned char*
+	SOIL_load_image_from_memory
+	(
+		const unsigned char *const buffer,
+		int buffer_length,
+		int *width, int *height, int *channels,
+		int force_channels
+	);
+
+/**
+	Saves an image from an array of unsigned chars (RGBA) to disk
+	\return 0 if failed, otherwise returns 1
+**/
+int
+	SOIL_save_image
+	(
+		const char *filename,
+		int image_type,
+		int width, int height, int channels,
+		const unsigned char *const data
+	);
+
+/**
+	Frees the image data (note, this is just C's "free()"...this function is
+	present mostly so C++ programmers don't forget to use "free()" and call
+	"delete []" instead [8^)
+**/
+void
+	SOIL_free_image_data
+	(
+		unsigned char *img_data
+	);
+
+/**
+	This function resturn a pointer to a string describing the last thing
+	that happened inside SOIL.  It can be used to determine why an image
+	failed to load.
+**/
+const char*
+	SOIL_last_result
+	(
+		void
+	);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HEADER_SIMPLE_OPENGL_IMAGE_LIBRARY	*/
--- a/5/src/SOIL/image_DXT.c
+++ b/5/src/SOIL/image_DXT.c
@ -0,0 +1,632 @@
+/*
+	Jonathan Dummer
+	2007-07-31-10.32
+
+	simple DXT compression / decompression code
+
+	public domain
+*/
+
+#include "image_DXT.h"
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+/*	set this =1 if you want to use the covarince matrix method...
+	which is better than my method of using standard deviations
+	overall, except on the infintesimal chance that the power
+	method fails for finding the largest eigenvector	*/
+#define USE_COV_MAT	1
+
+/********* Function Prototypes *********/
+/*
+	Takes a 4x4 block of pixels and compresses it into 8 bytes
+	in DXT1 format (color only, no alpha).  Speed is valued
+	over prettyness, at least for now.
+*/
+void compress_DDS_color_block(
+				int channels,
+				const unsigned char *const uncompressed,
+				unsigned char compressed[8] );
+/*
+	Takes a 4x4 block of pixels and compresses the alpha
+	component it into 8 bytes for use in DXT5 DDS files.
+	Speed is valued over prettyness, at least for now.
+*/
+void compress_DDS_alpha_block(
+				const unsigned char *const uncompressed,
+				unsigned char compressed[8] );
+
+/********* Actual Exposed Functions *********/
+int
+	save_image_as_DDS
+	(
+		const char *filename,
+		int width, int height, int channels,
+		const unsigned char *const data
+	)
+{
+	/*	variables	*/
+	FILE *fout;
+	unsigned char *DDS_data;
+	DDS_header header;
+	int DDS_size;
+	/*	error check	*/
+	if( (NULL == filename) ||
+		(width < 1) || (height < 1) ||
+		(channels < 1) || (channels > 4) ||
+		(data == NULL ) )
+	{
+		return 0;
+	}
+	/*	Convert the image	*/
+	if( (channels & 1) == 1 )
+	{
+		/*	no alpha, just use DXT1	*/
+		DDS_data = convert_image_to_DXT1( data, width, height, channels, &DDS_size );
+	} else
+	{
+		/*	has alpha, so use DXT5	*/
+		DDS_data = convert_image_to_DXT5( data, width, height, channels, &DDS_size );
+	}
+	/*	save it	*/
+	memset( &header, 0, sizeof( DDS_header ) );
+	header.dwMagic = ('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24);
+	header.dwSize = 124;
+	header.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT | DDSD_LINEARSIZE;
+	header.dwWidth = width;
+	header.dwHeight = height;
+	header.dwPitchOrLinearSize = DDS_size;
+	header.sPixelFormat.dwSize = 32;
+	header.sPixelFormat.dwFlags = DDPF_FOURCC;
+	if( (channels & 1) == 1 )
+	{
+		header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('1' << 24);
+	} else
+	{
+		header.sPixelFormat.dwFourCC = ('D' << 0) | ('X' << 8) | ('T' << 16) | ('5' << 24);
+	}
+	header.sCaps.dwCaps1 = DDSCAPS_TEXTURE;
+	/*	write it out	*/
+	fout = fopen( filename, "wb");
+	fwrite( &header, sizeof( DDS_header ), 1, fout );
+	fwrite( DDS_data, 1, DDS_size, fout );
+	fclose( fout );
+	/*	done	*/
+	free( DDS_data );
+	return 1;
+}
+
+unsigned char* convert_image_to_DXT1(
+		const unsigned char *const uncompressed,
+		int width, int height, int channels,
+		int *out_size )
+{
+	unsigned char *compressed;
+	int i, j, x, y;
+	unsigned char ublock[16*3];
+	unsigned char cblock[8];
+	int index = 0, chan_step = 1;
+	int block_count = 0;
+	/*	error check	*/
+	*out_size = 0;
+	if( (width < 1) || (height < 1) ||
+		(NULL == uncompressed) ||
+		(channels < 1) || (channels > 4) )
+	{
+		return NULL;
+	}
+	/*	for channels == 1 or 2, I do not step forward for R,G,B values	*/
+	if( channels < 3 )
+	{
+		chan_step = 0;
+	}
+	/*	get the RAM for the compressed image
+		(8 bytes per 4x4 pixel block)	*/
+	*out_size = ((width+3) >> 2) * ((height+3) >> 2) * 8;
+	compressed = (unsigned char*)malloc( *out_size );
+	/*	go through each block	*/
+	for( j = 0; j < height; j += 4 )
+	{
+		for( i = 0; i < width; i += 4 )
+		{
+			/*	copy this block into a new one	*/
+			int idx = 0;
+			int mx = 4, my = 4;
+			if( j+4 >= height )
+			{
+				my = height - j;
+			}
+			if( i+4 >= width )
+			{
+				mx = width - i;
+			}
+			for( y = 0; y < my; ++y )
+			{
+				for( x = 0; x < mx; ++x )
+				{
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels];
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step];
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step];
+				}
+				for( x = mx; x < 4; ++x )
+				{
+					ublock[idx++] = ublock[0];
+					ublock[idx++] = ublock[1];
+					ublock[idx++] = ublock[2];
+				}
+			}
+			for( y = my; y < 4; ++y )
+			{
+				for( x = 0; x < 4; ++x )
+				{
+					ublock[idx++] = ublock[0];
+					ublock[idx++] = ublock[1];
+					ublock[idx++] = ublock[2];
+				}
+			}
+			/*	compress the block	*/
+			++block_count;
+			compress_DDS_color_block( 3, ublock, cblock );
+			/*	copy the data from the block into the main block	*/
+			for( x = 0; x < 8; ++x )
+			{
+				compressed[index++] = cblock[x];
+			}
+		}
+	}
+	return compressed;
+}
+
+unsigned char* convert_image_to_DXT5(
+		const unsigned char *const uncompressed,
+		int width, int height, int channels,
+		int *out_size )
+{
+	unsigned char *compressed;
+	int i, j, x, y;
+	unsigned char ublock[16*4];
+	unsigned char cblock[8];
+	int index = 0, chan_step = 1;
+	int block_count = 0, has_alpha;
+	/*	error check	*/
+	*out_size = 0;
+	if( (width < 1) || (height < 1) ||
+		(NULL == uncompressed) ||
+		(channels < 1) || ( channels > 4) )
+	{
+		return NULL;
+	}
+	/*	for channels == 1 or 2, I do not step forward for R,G,B vales	*/
+	if( channels < 3 )
+	{
+		chan_step = 0;
+	}
+	/*	# channels = 1 or 3 have no alpha, 2 & 4 do have alpha	*/
+	has_alpha = 1 - (channels & 1);
+	/*	get the RAM for the compressed image
+		(16 bytes per 4x4 pixel block)	*/
+	*out_size = ((width+3) >> 2) * ((height+3) >> 2) * 16;
+	compressed = (unsigned char*)malloc( *out_size );
+	/*	go through each block	*/
+	for( j = 0; j < height; j += 4 )
+	{
+		for( i = 0; i < width; i += 4 )
+		{
+			/*	local variables, and my block counter	*/
+			int idx = 0;
+			int mx = 4, my = 4;
+			if( j+4 >= height )
+			{
+				my = height - j;
+			}
+			if( i+4 >= width )
+			{
+				mx = width - i;
+			}
+			for( y = 0; y < my; ++y )
+			{
+				for( x = 0; x < mx; ++x )
+				{
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels];
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step];
+					ublock[idx++] = uncompressed[(j+y)*width*channels+(i+x)*channels+chan_step+chan_step];
+					ublock[idx++] =
+						has_alpha * uncompressed[(j+y)*width*channels+(i+x)*channels+channels-1]
+						+ (1-has_alpha)*255;
+				}
+				for( x = mx; x < 4; ++x )
+				{
+					ublock[idx++] = ublock[0];
+					ublock[idx++] = ublock[1];
+					ublock[idx++] = ublock[2];
+					ublock[idx++] = ublock[3];
+				}
+			}
+			for( y = my; y < 4; ++y )
+			{
+				for( x = 0; x < 4; ++x )
+				{
+					ublock[idx++] = ublock[0];
+					ublock[idx++] = ublock[1];
+					ublock[idx++] = ublock[2];
+					ublock[idx++] = ublock[3];
+				}
+			}
+			/*	now compress the alpha block	*/
+			compress_DDS_alpha_block( ublock, cblock );
+			/*	copy the data from the compressed alpha block into the main buffer	*/
+			for( x = 0; x < 8; ++x )
+			{
+				compressed[index++] = cblock[x];
+			}
+			/*	then compress the color block	*/
+			++block_count;
+			compress_DDS_color_block( 4, ublock, cblock );
+			/*	copy the data from the compressed color block into the main buffer	*/
+			for( x = 0; x < 8; ++x )
+			{
+				compressed[index++] = cblock[x];
+			}
+		}
+	}
+	return compressed;
+}
+
+/********* Helper Functions *********/
+int convert_bit_range( int c, int from_bits, int to_bits )
+{
+	int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1);
+	return (b + (b >> from_bits)) >> from_bits;
+}
+
+int rgb_to_565( int r, int g, int b )
+{
+	return
+		(convert_bit_range( r, 8, 5 ) << 11) |
+		(convert_bit_range( g, 8, 6 ) << 05) |
+		(convert_bit_range( b, 8, 5 ) << 00);
+}
+
+void rgb_888_from_565( unsigned int c, int *r, int *g, int *b )
+{
+	*r = convert_bit_range( (c >> 11) & 31, 5, 8 );
+	*g = convert_bit_range( (c >> 05) & 63, 6, 8 );
+	*b = convert_bit_range( (c >> 00) & 31, 5, 8 );
+}
+
+void compute_color_line_STDEV(
+		const unsigned char *const uncompressed,
+		int channels,
+		float point[3], float direction[3] )
+{
+	const float inv_16 = 1.0f / 16.0f;
+	int i;
+	float sum_r = 0.0f, sum_g = 0.0f, sum_b = 0.0f;
+	float sum_rr = 0.0f, sum_gg = 0.0f, sum_bb = 0.0f;
+	float sum_rg = 0.0f, sum_rb = 0.0f, sum_gb = 0.0f;
+	/*	calculate all data needed for the covariance matrix
+		( to compare with _rygdxt code)	*/
+	for( i = 0; i < 16*channels; i += channels )
+	{
+		sum_r += uncompressed[i+0];
+		sum_rr += uncompressed[i+0] * uncompressed[i+0];
+		sum_g += uncompressed[i+1];
+		sum_gg += uncompressed[i+1] * uncompressed[i+1];
+		sum_b += uncompressed[i+2];
+		sum_bb += uncompressed[i+2] * uncompressed[i+2];
+		sum_rg += uncompressed[i+0] * uncompressed[i+1];
+		sum_rb += uncompressed[i+0] * uncompressed[i+2];
+		sum_gb += uncompressed[i+1] * uncompressed[i+2];
+	}
+	/*	convert the sums to averages	*/
+	sum_r *= inv_16;
+	sum_g *= inv_16;
+	sum_b *= inv_16;
+	/*	and convert the squares to the squares of the value - avg_value	*/
+	sum_rr -= 16.0f * sum_r * sum_r;
+	sum_gg -= 16.0f * sum_g * sum_g;
+	sum_bb -= 16.0f * sum_b * sum_b;
+	sum_rg -= 16.0f * sum_r * sum_g;
+	sum_rb -= 16.0f * sum_r * sum_b;
+	sum_gb -= 16.0f * sum_g * sum_b;
+	/*	the point on the color line is the average	*/
+	point[0] = sum_r;
+	point[1] = sum_g;
+	point[2] = sum_b;
+	#if USE_COV_MAT
+	/*
+		The following idea was from ryg.
+		(https://mollyrocket.com/forums/viewtopic.php?t=392)
+		The method worked great (less RMSE than mine) most of
+		the time, but had some issues handling some simple
+		boundary cases, like full green next to full red,
+		which would generate a covariance matrix like this:
+
+		| 1  -1  0 |
+		| -1  1  0 |
+		| 0   0  0 |
+
+		For a given starting vector, the power method can
+		generate all zeros!  So no starting with {1,1,1}
+		as I was doing!  This kind of error is still a
+		slight posibillity, but will be very rare.
+	*/
+	/*	use the covariance matrix directly
+		(1st iteration, don't use all 1.0 values!)	*/
+	sum_r = 1.0f;
+	sum_g = 2.718281828f;
+	sum_b = 3.141592654f;
+	direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
+	direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
+	direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
+	/*	2nd iteration, use results from the 1st guy	*/
+	sum_r = direction[0];
+	sum_g = direction[1];
+	sum_b = direction[2];
+	direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
+	direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
+	direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
+	/*	3rd iteration, use results from the 2nd guy	*/
+	sum_r = direction[0];
+	sum_g = direction[1];
+	sum_b = direction[2];
+	direction[0] = sum_r*sum_rr + sum_g*sum_rg + sum_b*sum_rb;
+	direction[1] = sum_r*sum_rg + sum_g*sum_gg + sum_b*sum_gb;
+	direction[2] = sum_r*sum_rb + sum_g*sum_gb + sum_b*sum_bb;
+	#else
+	/*	use my standard deviation method
+		(very robust, a tiny bit slower and less accurate)	*/
+	direction[0] = sqrt( sum_rr );
+	direction[1] = sqrt( sum_gg );
+	direction[2] = sqrt( sum_bb );
+	/*	which has a greater component	*/
+	if( sum_gg > sum_rr )
+	{
+		/*	green has greater component, so base the other signs off of green	*/
+		if( sum_rg < 0.0f )
+		{
+			direction[0] = -direction[0];
+		}
+		if( sum_gb < 0.0f )
+		{
+			direction[2] = -direction[2];
+		}
+	} else
+	{
+		/*	red has a greater component	*/
+		if( sum_rg < 0.0f )
+		{
+			direction[1] = -direction[1];
+		}
+		if( sum_rb < 0.0f )
+		{
+			direction[2] = -direction[2];
+		}
+	}
+	#endif
+}
+
+void LSE_master_colors_max_min(
+		int *cmax, int *cmin,
+		int channels,
+		const unsigned char *const uncompressed )
+{
+	int i, j;
+	/*	the master colors	*/
+	int c0[3], c1[3];
+	/*	used for fitting the line	*/
+	float sum_x[] = { 0.0f, 0.0f, 0.0f };
+	float sum_x2[] = { 0.0f, 0.0f, 0.0f };
+	float dot_max = 1.0f, dot_min = -1.0f;
+	float vec_len2 = 0.0f;
+	float dot;
+	/*	error check	*/
+	if( (channels < 3) || (channels > 4) )
+	{
+		return;
+	}
+	compute_color_line_STDEV( uncompressed, channels, sum_x, sum_x2 );
+	vec_len2 = 1.0f / ( 0.00001f +
+			sum_x2[0]*sum_x2[0] + sum_x2[1]*sum_x2[1] + sum_x2[2]*sum_x2[2] );
+	/*	finding the max and min vector values	*/
+	dot_max =
+			(
+				sum_x2[0] * uncompressed[0] +
+				sum_x2[1] * uncompressed[1] +
+				sum_x2[2] * uncompressed[2]
+			);
+	dot_min = dot_max;
+	for( i = 1; i < 16; ++i )
+	{
+		dot =
+			(
+				sum_x2[0] * uncompressed[i*channels+0] +
+				sum_x2[1] * uncompressed[i*channels+1] +
+				sum_x2[2] * uncompressed[i*channels+2]
+			);
+		if( dot < dot_min )
+		{
+			dot_min = dot;
+		} else if( dot > dot_max )
+		{
+			dot_max = dot;
+		}
+	}
+	/*	and the offset (from the average location)	*/
+	dot = sum_x2[0]*sum_x[0] + sum_x2[1]*sum_x[1] + sum_x2[2]*sum_x[2];
+	dot_min -= dot;
+	dot_max -= dot;
+	/*	post multiply by the scaling factor	*/
+	dot_min *= vec_len2;
+	dot_max *= vec_len2;
+	/*	OK, build the master colors	*/
+	for( i = 0; i < 3; ++i )
+	{
+		/*	color 0	*/
+		c0[i] = (int)(0.5f + sum_x[i] + dot_max * sum_x2[i]);
+		if( c0[i] < 0 )
+		{
+			c0[i] = 0;
+		} else if( c0[i] > 255 )
+		{
+			c0[i] = 255;
+		}
+		/*	color 1	*/
+		c1[i] = (int)(0.5f + sum_x[i] + dot_min * sum_x2[i]);
+		if( c1[i] < 0 )
+		{
+			c1[i] = 0;
+		} else if( c1[i] > 255 )
+		{
+			c1[i] = 255;
+		}
+	}
+	/*	down_sample (with rounding?)	*/
+	i = rgb_to_565( c0[0], c0[1], c0[2] );
+	j = rgb_to_565( c1[0], c1[1], c1[2] );
+	if( i > j )
+	{
+		*cmax = i;
+		*cmin = j;
+	} else
+	{
+		*cmax = j;
+		*cmin = i;
+	}
+}
+
+void
+	compress_DDS_color_block
+	(
+		int channels,
+		const unsigned char *const uncompressed,
+		unsigned char compressed[8]
+	)
+{
+	/*	variables	*/
+	int i;
+	int next_bit;
+	int enc_c0, enc_c1;
+	int c0[4], c1[4];
+	float color_line[] = { 0.0f, 0.0f, 0.0f, 0.0f };
+	float vec_len2 = 0.0f, dot_offset = 0.0f;
+	/*	stupid order	*/
+	int swizzle4[] = { 0, 2, 3, 1 };
+	/*	get the master colors	*/
+	LSE_master_colors_max_min( &enc_c0, &enc_c1, channels, uncompressed );
+	/*	store the 565 color 0 and color 1	*/
+	compressed[0] = (enc_c0 >> 0) & 255;
+	compressed[1] = (enc_c0 >> 8) & 255;
+	compressed[2] = (enc_c1 >> 0) & 255;
+	compressed[3] = (enc_c1 >> 8) & 255;
+	/*	zero out the compressed data	*/
+	compressed[4] = 0;
+	compressed[5] = 0;
+	compressed[6] = 0;
+	compressed[7] = 0;
+	/*	reconstitute the master color vectors	*/
+	rgb_888_from_565( enc_c0, &c0[0], &c0[1], &c0[2] );
+	rgb_888_from_565( enc_c1, &c1[0], &c1[1], &c1[2] );
+	/*	the new vector	*/
+	vec_len2 = 0.0f;
+	for( i = 0; i < 3; ++i )
+	{
+		color_line[i] = (float)(c1[i] - c0[i]);
+		vec_len2 += color_line[i] * color_line[i];
+	}
+	if( vec_len2 > 0.0f )
+	{
+		vec_len2 = 1.0f / vec_len2;
+	}
+	/*	pre-proform the scaling	*/
+	color_line[0] *= vec_len2;
+	color_line[1] *= vec_len2;
+	color_line[2] *= vec_len2;
+	/*	compute the offset (constant) portion of the dot product	*/
+	dot_offset = color_line[0]*c0[0] + color_line[1]*c0[1] + color_line[2]*c0[2];
+	/*	store the rest of the bits	*/
+	next_bit = 8*4;
+	for( i = 0; i < 16; ++i )
+	{
+		/*	find the dot product of this color, to place it on the line
+			(should be [-1,1])	*/
+		int next_value = 0;
+		float dot_product =
+			color_line[0] * uncompressed[i*channels+0] +
+			color_line[1] * uncompressed[i*channels+1] +
+			color_line[2] * uncompressed[i*channels+2] -
+			dot_offset;
+		/*	map to [0,3]	*/
+		next_value = (int)( dot_product * 3.0f + 0.5f );
+		if( next_value > 3 )
+		{
+			next_value = 3;
+		} else if( next_value < 0 )
+		{
+			next_value = 0;
+		}
+		/*	OK, store this value	*/
+		compressed[next_bit >> 3] |= swizzle4[ next_value ] << (next_bit & 7);
+		next_bit += 2;
+	}
+	/*	done compressing to DXT1	*/
+}
+
+void
+	compress_DDS_alpha_block
+	(
+		const unsigned char *const uncompressed,
+		unsigned char compressed[8]
+	)
+{
+	/*	variables	*/
+	int i;
+	int next_bit;
+	int a0, a1;
+	float scale_me;
+	/*	stupid order	*/
+	int swizzle8[] = { 1, 7, 6, 5, 4, 3, 2, 0 };
+	/*	get the alpha limits (a0 > a1)	*/
+	a0 = a1 = uncompressed[3];
+	for( i = 4+3; i < 16*4; i += 4 )
+	{
+		if( uncompressed[i] > a0 )
+		{
+			a0 = uncompressed[i];
+		} else if( uncompressed[i] < a1 )
+		{
+			a1 = uncompressed[i];
+		}
+	}
+	/*	store those limits, and zero the rest of the compressed dataset	*/
+	compressed[0] = a0;
+	compressed[1] = a1;
+	/*	zero out the compressed data	*/
+	compressed[2] = 0;
+	compressed[3] = 0;
+	compressed[4] = 0;
+	compressed[5] = 0;
+	compressed[6] = 0;
+	compressed[7] = 0;
+	/*	store the all of the alpha values	*/
+	next_bit = 8*2;
+	scale_me = 7.9999f / (a0 - a1);
+	for( i = 3; i < 16*4; i += 4 )
+	{
+		/*	convert this alpha value to a 3 bit number	*/
+		int svalue;
+		int value = (int)((uncompressed[i] - a1) * scale_me);
+		svalue = swizzle8[ value&7 ];
+		/*	OK, store this value, start with the 1st byte	*/
+		compressed[next_bit >> 3] |= svalue << (next_bit & 7);
+		if( (next_bit & 7) > 5 )
+		{
+			/*	spans 2 bytes, fill in the start of the 2nd byte	*/
+			compressed[1 + (next_bit >> 3)] |= svalue >> (8 - (next_bit & 7) );
+		}
+		next_bit += 3;
+	}
+	/*	done compressing to DXT1	*/
+}
--- a/5/src/SOIL/image_DXT.h
+++ b/5/src/SOIL/image_DXT.h
@ -0,0 +1,123 @@
+/*
+	Jonathan Dummer
+	2007-07-31-10.32
+
+	simple DXT compression / decompression code
+
+	public domain
+*/
+
+#ifndef HEADER_IMAGE_DXT
+#define HEADER_IMAGE_DXT
+
+/**
+	Converts an image from an array of unsigned chars (RGB or RGBA) to
+	DXT1 or DXT5, then saves the converted image to disk.
+	\return 0 if failed, otherwise returns 1
+**/
+int
+save_image_as_DDS
+(
+    const char *filename,
+    int width, int height, int channels,
+    const unsigned char *const data
+);
+
+/**
+	take an image and convert it to DXT1 (no alpha)
+**/
+unsigned char*
+convert_image_to_DXT1
+(
+    const unsigned char *const uncompressed,
+    int width, int height, int channels,
+    int *out_size
+);
+
+/**
+	take an image and convert it to DXT5 (with alpha)
+**/
+unsigned char*
+convert_image_to_DXT5
+(
+    const unsigned char *const uncompressed,
+    int width, int height, int channels,
+    int *out_size
+);
+
+/**	A bunch of DirectDraw Surface structures and flags **/
+typedef struct
+{
+    unsigned int    dwMagic;
+    unsigned int    dwSize;
+    unsigned int    dwFlags;
+    unsigned int    dwHeight;
+    unsigned int    dwWidth;
+    unsigned int    dwPitchOrLinearSize;
+    unsigned int    dwDepth;
+    unsigned int    dwMipMapCount;
+    unsigned int    dwReserved1[ 11 ];
+
+    /*  DDPIXELFORMAT	*/
+    struct
+    {
+        unsigned int    dwSize;
+        unsigned int    dwFlags;
+        unsigned int    dwFourCC;
+        unsigned int    dwRGBBitCount;
+        unsigned int    dwRBitMask;
+        unsigned int    dwGBitMask;
+        unsigned int    dwBBitMask;
+        unsigned int    dwAlphaBitMask;
+    }
+    sPixelFormat;
+
+    /*  DDCAPS2	*/
+    struct
+    {
+        unsigned int    dwCaps1;
+        unsigned int    dwCaps2;
+        unsigned int    dwDDSX;
+        unsigned int    dwReserved;
+    }
+    sCaps;
+    unsigned int    dwReserved2;
+}
+DDS_header ;
+
+/*	the following constants were copied directly off the MSDN website	*/
+
+/*	The dwFlags member of the original DDSURFACEDESC2 structure
+	can be set to one or more of the following values.	*/
+#define DDSD_CAPS	0x00000001
+#define DDSD_HEIGHT	0x00000002
+#define DDSD_WIDTH	0x00000004
+#define DDSD_PITCH	0x00000008
+#define DDSD_PIXELFORMAT	0x00001000
+#define DDSD_MIPMAPCOUNT	0x00020000
+#define DDSD_LINEARSIZE	0x00080000
+#define DDSD_DEPTH	0x00800000
+
+/*	DirectDraw Pixel Format	*/
+#define DDPF_ALPHAPIXELS	0x00000001
+#define DDPF_FOURCC	0x00000004
+#define DDPF_RGB	0x00000040
+
+/*	The dwCaps1 member of the DDSCAPS2 structure can be
+	set to one or more of the following values.	*/
+#define DDSCAPS_COMPLEX	0x00000008
+#define DDSCAPS_TEXTURE	0x00001000
+#define DDSCAPS_MIPMAP	0x00400000
+
+/*	The dwCaps2 member of the DDSCAPS2 structure can be
+	set to one or more of the following values.		*/
+#define DDSCAPS2_CUBEMAP	0x00000200
+#define DDSCAPS2_CUBEMAP_POSITIVEX	0x00000400
+#define DDSCAPS2_CUBEMAP_NEGATIVEX	0x00000800
+#define DDSCAPS2_CUBEMAP_POSITIVEY	0x00001000
+#define DDSCAPS2_CUBEMAP_NEGATIVEY	0x00002000
+#define DDSCAPS2_CUBEMAP_POSITIVEZ	0x00004000
+#define DDSCAPS2_CUBEMAP_NEGATIVEZ	0x00008000
+#define DDSCAPS2_VOLUME	0x00200000
+
+#endif /* HEADER_IMAGE_DXT	*/
--- a/5/src/SOIL/image_helper.c
+++ b/5/src/SOIL/image_helper.c
@ -0,0 +1,435 @@
+/*
+    Jonathan Dummer
+
+    image helper functions
+
+    MIT license
+*/
+
+#include "image_helper.h"
+#include <stdlib.h>
+#include <math.h>
+
+/*	Upscaling the image uses simple bilinear interpolation	*/
+int
+	up_scale_image
+	(
+		const unsigned char* const orig,
+		int width, int height, int channels,
+		unsigned char* resampled,
+		int resampled_width, int resampled_height
+	)
+{
+	float dx, dy;
+	int x, y, c;
+
+    /* error(s) check	*/
+    if ( 	(width < 1) || (height < 1) ||
+            (resampled_width < 2) || (resampled_height < 2) ||
+            (channels < 1) ||
+            (NULL == orig) || (NULL == resampled) )
+    {
+        /*	signify badness	*/
+        return 0;
+    }
+    /*
+		for each given pixel in the new map, find the exact location
+		from the original map which would contribute to this guy
+	*/
+    dx = (width - 1.0f) / (resampled_width - 1.0f);
+    dy = (height - 1.0f) / (resampled_height - 1.0f);
+    for ( y = 0; y < resampled_height; ++y )
+    {
+    	/* find the base y index and fractional offset from that	*/
+    	float sampley = y * dy;
+    	int inty = (int)sampley;
+    	/*	if( inty < 0 ) { inty = 0; } else	*/
+		if( inty > height - 2 ) { inty = height - 2; }
+		sampley -= inty;
+        for ( x = 0; x < resampled_width; ++x )
+        {
+			float samplex = x * dx;
+			int intx = (int)samplex;
+			int base_index;
+			/* find the base x index and fractional offset from that	*/
+			/*	if( intx < 0 ) { intx = 0; } else	*/
+			if( intx > width - 2 ) { intx = width - 2; }
+			samplex -= intx;
+			/*	base index into the original image	*/
+			base_index = (inty * width + intx) * channels;
+            for ( c = 0; c < channels; ++c )
+            {
+            	/*	do the sampling	*/
+				float value = 0.5f;
+				value += orig[base_index]
+							*(1.0f-samplex)*(1.0f-sampley);
+				value += orig[base_index+channels]
+							*(samplex)*(1.0f-sampley);
+				value += orig[base_index+width*channels]
+							*(1.0f-samplex)*(sampley);
+				value += orig[base_index+width*channels+channels]
+							*(samplex)*(sampley);
+				/*	move to the next channel	*/
+				++base_index;
+            	/*	save the new value	*/
+            	resampled[y*resampled_width*channels+x*channels+c] =
+						(unsigned char)(value);
+            }
+        }
+    }
+    /*	done	*/
+    return 1;
+}
+
+int
+	mipmap_image
+	(
+		const unsigned char* const orig,
+		int width, int height, int channels,
+		unsigned char* resampled,
+		int block_size_x, int block_size_y
+	)
+{
+	int mip_width, mip_height;
+	int i, j, c;
+
+	/*	error check	*/
+	if( (width < 1) || (height < 1) ||
+		(channels < 1) || (orig == NULL) ||
+		(resampled == NULL) ||
+		(block_size_x < 1) || (block_size_y < 1) )
+	{
+		/*	nothing to do	*/
+		return 0;
+	}
+	mip_width = width / block_size_x;
+	mip_height = height / block_size_y;
+	if( mip_width < 1 )
+	{
+		mip_width = 1;
+	}
+	if( mip_height < 1 )
+	{
+		mip_height = 1;
+	}
+	for( j = 0; j < mip_height; ++j )
+	{
+		for( i = 0; i < mip_width; ++i )
+		{
+			for( c = 0; c < channels; ++c )
+			{
+				const int index = (j*block_size_y)*width*channels + (i*block_size_x)*channels + c;
+				int sum_value;
+				int u,v;
+				int u_block = block_size_x;
+				int v_block = block_size_y;
+				int block_area;
+				/*	do a bit of checking so we don't over-run the boundaries
+					(necessary for non-square textures!)	*/
+				if( block_size_x * (i+1) > width )
+				{
+					u_block = width - i*block_size_y;
+				}
+				if( block_size_y * (j+1) > height )
+				{
+					v_block = height - j*block_size_y;
+				}
+				block_area = u_block*v_block;
+				/*	for this pixel, see what the average
+					of all the values in the block are.
+					note: start the sum at the rounding value, not at 0	*/
+				sum_value = block_area >> 1;
+				for( v = 0; v < v_block; ++v )
+				for( u = 0; u < u_block; ++u )
+				{
+					sum_value += orig[index + v*width*channels + u*channels];
+				}
+				resampled[j*mip_width*channels + i*channels + c] = sum_value / block_area;
+			}
+		}
+	}
+	return 1;
+}
+
+int
+	scale_image_RGB_to_NTSC_safe
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	)
+{
+	const float scale_lo = 16.0f - 0.499f;
+	const float scale_hi = 235.0f + 0.499f;
+	int i, j;
+	int nc = channels;
+	unsigned char scale_LUT[256];
+	/*	error check	*/
+	if( (width < 1) || (height < 1) ||
+		(channels < 1) || (orig == NULL) )
+	{
+		/*	nothing to do	*/
+		return 0;
+	}
+	/*	set up the scaling Look Up Table	*/
+	for( i = 0; i < 256; ++i )
+	{
+		scale_LUT[i] = (unsigned char)((scale_hi - scale_lo) * i / 255.0f + scale_lo);
+	}
+	/*	for channels = 2 or 4, ignore the alpha component	*/
+	nc -= 1 - (channels & 1);
+	/*	OK, go through the image and scale any non-alpha components	*/
+	for( i = 0; i < width*height*channels; i += channels )
+	{
+		for( j = 0; j < nc; ++j )
+		{
+			orig[i+j] = scale_LUT[orig[i+j]];
+		}
+	}
+	return 1;
+}
+
+unsigned char clamp_byte( int x ) { return ( (x) < 0 ? (0) : ( (x) > 255 ? 255 : (x) ) ); }
+
+/*
+	This function takes the RGB components of the image
+	and converts them into YCoCg.  3 components will be
+	re-ordered to CoYCg (for optimum DXT1 compression),
+	while 4 components will be ordered CoCgAY (for DXT5
+	compression).
+*/
+int
+	convert_RGB_to_YCoCg
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	)
+{
+	int i;
+	/*	error check	*/
+	if( (width < 1) || (height < 1) ||
+		(channels < 3) || (channels > 4) ||
+		(orig == NULL) )
+	{
+		/*	nothing to do	*/
+		return -1;
+	}
+	/*	do the conversion	*/
+	if( channels == 3 )
+	{
+		for( i = 0; i < width*height*3; i += 3 )
+		{
+			int r = orig[i+0];
+			int g = (orig[i+1] + 1) >> 1;
+			int b = orig[i+2];
+			int tmp = (2 + r + b) >> 2;
+			/*	Co	*/
+			orig[i+0] = clamp_byte( 128 + ((r - b + 1) >> 1) );
+			/*	Y	*/
+			orig[i+1] = clamp_byte( g + tmp );
+			/*	Cg	*/
+			orig[i+2] = clamp_byte( 128 + g - tmp );
+		}
+	} else
+	{
+		for( i = 0; i < width*height*4; i += 4 )
+		{
+			int r = orig[i+0];
+			int g = (orig[i+1] + 1) >> 1;
+			int b = orig[i+2];
+			unsigned char a = orig[i+3];
+			int tmp = (2 + r + b) >> 2;
+			/*	Co	*/
+			orig[i+0] = clamp_byte( 128 + ((r - b + 1) >> 1) );
+			/*	Cg	*/
+			orig[i+1] = clamp_byte( 128 + g - tmp );
+			/*	Alpha	*/
+			orig[i+2] = a;
+			/*	Y	*/
+			orig[i+3] = clamp_byte( g + tmp );
+		}
+	}
+	/*	done	*/
+	return 0;
+}
+
+/*
+	This function takes the YCoCg components of the image
+	and converts them into RGB.  See above.
+*/
+int
+	convert_YCoCg_to_RGB
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	)
+{
+	int i;
+	/*	error check	*/
+	if( (width < 1) || (height < 1) ||
+		(channels < 3) || (channels > 4) ||
+		(orig == NULL) )
+	{
+		/*	nothing to do	*/
+		return -1;
+	}
+	/*	do the conversion	*/
+	if( channels == 3 )
+	{
+		for( i = 0; i < width*height*3; i += 3 )
+		{
+			int co = orig[i+0] - 128;
+			int y  = orig[i+1];
+			int cg = orig[i+2] - 128;
+			/*	R	*/
+			orig[i+0] = clamp_byte( y + co - cg );
+			/*	G	*/
+			orig[i+1] = clamp_byte( y + cg );
+			/*	B	*/
+			orig[i+2] = clamp_byte( y - co - cg );
+		}
+	} else
+	{
+		for( i = 0; i < width*height*4; i += 4 )
+		{
+			int co = orig[i+0] - 128;
+			int cg = orig[i+1] - 128;
+			unsigned char a  = orig[i+2];
+			int y  = orig[i+3];
+			/*	R	*/
+			orig[i+0] = clamp_byte( y + co - cg );
+			/*	G	*/
+			orig[i+1] = clamp_byte( y + cg );
+			/*	B	*/
+			orig[i+2] = clamp_byte( y - co - cg );
+			/*	A	*/
+			orig[i+3] = a;
+		}
+	}
+	/*	done	*/
+	return 0;
+}
+
+float
+find_max_RGBE
+(
+	unsigned char *image,
+    int width, int height
+)
+{
+	float max_val = 0.0f;
+	unsigned char *img = image;
+	int i, j;
+	for( i = width * height; i > 0; --i )
+	{
+		/* float scale = powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
+		float scale = ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
+		for( j = 0; j < 3; ++j )
+		{
+			if( img[j] * scale > max_val )
+			{
+				max_val = img[j] * scale;
+			}
+		}
+		/* next pixel */
+		img += 4;
+	}
+	return max_val;
+}
+
+int
+RGBE_to_RGBdivA
+(
+    unsigned char *image,
+    int width, int height,
+    int rescale_to_max
+)
+{
+	/* local variables */
+	int i, iv;
+	unsigned char *img = image;
+	float scale = 1.0f;
+	/* error check */
+	if( (!image) || (width < 1) || (height < 1) )
+	{
+		return 0;
+	}
+	/* convert (note: no negative numbers, but 0.0 is possible) */
+	if( rescale_to_max )
+	{
+		scale = 255.0f / find_max_RGBE( image, width, height );
+	}
+	for( i = width * height; i > 0; --i )
+	{
+		/* decode this pixel, and find the max */
+		float r,g,b,e, m;
+		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
+		e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
+		r = e * img[0];
+		g = e * img[1];
+		b = e * img[2];
+		m = (r > g) ? r : g;
+		m = (b > m) ? b : m;
+		/* and encode it into RGBdivA */
+		iv = (m != 0.0f) ? (int)(255.0f / m) : 1.0f;
+		iv = (iv < 1) ? 1 : iv;
+		img[3] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * r + 0.5f);
+		img[0] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * g + 0.5f);
+		img[1] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * b + 0.5f);
+		img[2] = (iv > 255) ? 255 : iv;
+		/* and on to the next pixel */
+		img += 4;
+	}
+	return 1;
+}
+
+int
+RGBE_to_RGBdivA2
+(
+    unsigned char *image,
+    int width, int height,
+    int rescale_to_max
+)
+{
+	/* local variables */
+	int i, iv;
+	unsigned char *img = image;
+	float scale = 1.0f;
+	/* error check */
+	if( (!image) || (width < 1) || (height < 1) )
+	{
+		return 0;
+	}
+	/* convert (note: no negative numbers, but 0.0 is possible) */
+	if( rescale_to_max )
+	{
+		scale = 255.0f * 255.0f / find_max_RGBE( image, width, height );
+	}
+	for( i = width * height; i > 0; --i )
+	{
+		/* decode this pixel, and find the max */
+		float r,g,b,e, m;
+		/* e = scale * powf( 2.0f, img[3] - 128.0f ) / 255.0f; */
+		e = scale * ldexp( 1.0f / 255.0f, (int)(img[3]) - 128 );
+		r = e * img[0];
+		g = e * img[1];
+		b = e * img[2];
+		m = (r > g) ? r : g;
+		m = (b > m) ? b : m;
+		/* and encode it into RGBdivA */
+		iv = (m != 0.0f) ? (int)sqrtf( 255.0f * 255.0f / m ) : 1.0f;
+		iv = (iv < 1) ? 1 : iv;
+		img[3] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * img[3] * r / 255.0f + 0.5f);
+		img[0] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * img[3] * g / 255.0f + 0.5f);
+		img[1] = (iv > 255) ? 255 : iv;
+		iv = (int)(img[3] * img[3] * b / 255.0f + 0.5f);
+		img[2] = (iv > 255) ? 255 : iv;
+		/* and on to the next pixel */
+		img += 4;
+	}
+	return 1;
+}
--- a/5/src/SOIL/image_helper.h
+++ b/5/src/SOIL/image_helper.h
@ -0,0 +1,115 @@
+/*
+    Jonathan Dummer
+
+    Image helper functions
+
+    MIT license
+*/
+
+#ifndef HEADER_IMAGE_HELPER
+#define HEADER_IMAGE_HELPER
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+	This function upscales an image.
+	Not to be used to create MIPmaps,
+	but to make it square,
+	or to make it a power-of-two sized.
+**/
+int
+	up_scale_image
+	(
+		const unsigned char* const orig,
+		int width, int height, int channels,
+		unsigned char* resampled,
+		int resampled_width, int resampled_height
+	);
+
+/**
+	This function downscales an image.
+	Used for creating MIPmaps,
+	the incoming image should be a
+	power-of-two sized.
+**/
+int
+	mipmap_image
+	(
+		const unsigned char* const orig,
+		int width, int height, int channels,
+		unsigned char* resampled,
+		int block_size_x, int block_size_y
+	);
+
+/**
+	This function takes the RGB components of the image
+	and scales each channel from [0,255] to [16,235].
+	This makes the colors "Safe" for display on NTSC
+	displays.  Note that this is _NOT_ a good idea for
+	loading images like normal- or height-maps!
+**/
+int
+	scale_image_RGB_to_NTSC_safe
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	);
+
+/**
+	This function takes the RGB components of the image
+	and converts them into YCoCg.  3 components will be
+	re-ordered to CoYCg (for optimum DXT1 compression),
+	while 4 components will be ordered CoCgAY (for DXT5
+	compression).
+**/
+int
+	convert_RGB_to_YCoCg
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	);
+
+/**
+	This function takes the YCoCg components of the image
+	and converts them into RGB.  See above.
+**/
+int
+	convert_YCoCg_to_RGB
+	(
+		unsigned char* orig,
+		int width, int height, int channels
+	);
+
+/**
+	Converts an HDR image from an array
+	of unsigned chars (RGBE) to RGBdivA
+	\return 0 if failed, otherwise returns 1
+**/
+int
+	RGBE_to_RGBdivA
+	(
+		unsigned char *image,
+		int width, int height,
+		int rescale_to_max
+	);
+
+/**
+	Converts an HDR image from an array
+	of unsigned chars (RGBE) to RGBdivA2
+	\return 0 if failed, otherwise returns 1
+**/
+int
+	RGBE_to_RGBdivA2
+	(
+		unsigned char *image,
+		int width, int height,
+		int rescale_to_max
+	);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HEADER_IMAGE_HELPER	*/
--- a/5/src/SOIL/stb_image_aug.c
+++ b/5/src/SOIL/stb_image_aug.c
--- a/5/src/SOIL/stb_image_aug.h
+++ b/5/src/SOIL/stb_image_aug.h
@ -0,0 +1,354 @@
+/* stbi-1.16 - public domain JPEG/PNG reader - http://nothings.org/stb_image.c
+                      when you control the images you're loading
+
+   QUICK NOTES:
+      Primarily of interest to game developers and other people who can
+          avoid problematic images and only need the trivial interface
+
+      JPEG baseline (no JPEG progressive, no oddball channel decimations)
+      PNG non-interlaced
+      BMP non-1bpp, non-RLE
+      TGA (not sure what subset, if a subset)
+      PSD (composited view only, no extra channels)
+      HDR (radiance rgbE format)
+      writes BMP,TGA (define STBI_NO_WRITE to remove code)
+      decoded from memory or through stdio FILE (define STBI_NO_STDIO to remove code)
+      supports installable dequantizing-IDCT, YCbCr-to-RGB conversion (define STBI_SIMD)
+        
+   TODO:
+      stbi_info_*
+  
+   history:
+      1.16   major bugfix - convert_format converted one too many pixels
+      1.15   initialize some fields for thread safety
+      1.14   fix threadsafe conversion bug; header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
+      1.13   threadsafe
+      1.12   const qualifiers in the API
+      1.11   Support installable IDCT, colorspace conversion routines
+      1.10   Fixes for 64-bit (don't use "unsigned long")
+             optimized upsampling by Fabian "ryg" Giesen
+      1.09   Fix format-conversion for PSD code (bad global variables!)
+      1.08   Thatcher Ulrich's PSD code integrated by Nicolas Schulz
+      1.07   attempt to fix C++ warning/errors again
+      1.06   attempt to fix C++ warning/errors again
+      1.05   fix TGA loading to return correct *comp and use good luminance calc
+      1.04   default float alpha is 1, not 255; use 'void *' for stbi_image_free
+      1.03   bugfixes to STBI_NO_STDIO, STBI_NO_HDR
+      1.02   support for (subset of) HDR files, float interface for preferred access to them
+      1.01   fix bug: possible bug in handling right-side up bmps... not sure
+             fix bug: the stbi_bmp_load() and stbi_tga_load() functions didn't work at all
+      1.00   interface to zlib that skips zlib header
+      0.99   correct handling of alpha in palette
+      0.98   TGA loader by lonesock; dynamically add loaders (untested)
+      0.97   jpeg errors on too large a file; also catch another malloc failure
+      0.96   fix detection of invalid v value - particleman@mollyrocket forum
+      0.95   during header scan, seek to markers in case of padding
+      0.94   STBI_NO_STDIO to disable stdio usage; rename all #defines the same
+      0.93   handle jpegtran output; verbose errors
+      0.92   read 4,8,16,24,32-bit BMP files of several formats
+      0.91   output 24-bit Windows 3.0 BMP files
+      0.90   fix a few more warnings; bump version number to approach 1.0
+      0.61   bugfixes due to Marc LeBlanc, Christopher Lloyd
+      0.60   fix compiling as c++
+      0.59   fix warnings: merge Dave Moore's -Wall fixes
+      0.58   fix bug: zlib uncompressed mode len/nlen was wrong endian
+      0.57   fix bug: jpg last huffman symbol before marker was >9 bits but less
+                      than 16 available
+      0.56   fix bug: zlib uncompressed mode len vs. nlen
+      0.55   fix bug: restart_interval not initialized to 0
+      0.54   allow NULL for 'int *comp'
+      0.53   fix bug in png 3->4; speedup png decoding
+      0.52   png handles req_comp=3,4 directly; minor cleanup; jpeg comments
+      0.51   obey req_comp requests, 1-component jpegs return as 1-component,
+             on 'test' only check type, not whether we support this variant
+*/
+
+#ifndef HEADER_STB_IMAGE_AUGMENTED
+#define HEADER_STB_IMAGE_AUGMENTED
+
+////   begin header file  ////////////////////////////////////////////////////
+//
+// Limitations:
+//    - no progressive/interlaced support (jpeg, png)
+//    - 8-bit samples only (jpeg, png)
+//    - not threadsafe
+//    - channel subsampling of at most 2 in each dimension (jpeg)
+//    - no delayed line count (jpeg) -- IJG doesn't support either
+//
+// Basic usage (see HDR discussion below):
+//    int x,y,n;
+//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
+//    // ... process data if not NULL ... 
+//    // ... x = width, y = height, n = # 8-bit components per pixel ...
+//    // ... replace '0' with '1'..'4' to force that many components per pixel
+//    stbi_image_free(data)
+//
+// Standard parameters:
+//    int *x       -- outputs image width in pixels
+//    int *y       -- outputs image height in pixels
+//    int *comp    -- outputs # of image components in image file
+//    int req_comp -- if non-zero, # of image components requested in result
+//
+// The return value from an image loader is an 'unsigned char *' which points
+// to the pixel data. The pixel data consists of *y scanlines of *x pixels,
+// with each pixel consisting of N interleaved 8-bit components; the first
+// pixel pointed to is top-left-most in the image. There is no padding between
+// image scanlines or between pixels, regardless of format. The number of
+// components N is 'req_comp' if req_comp is non-zero, or *comp otherwise.
+// If req_comp is non-zero, *comp has the number of components that _would_
+// have been output otherwise. E.g. if you set req_comp to 4, you will always
+// get RGBA output, but you can check *comp to easily see if it's opaque.
+//
+// An output image with N components has the following components interleaved
+// in this order in each pixel:
+//
+//     N=#comp     components
+//       1           grey
+//       2           grey, alpha
+//       3           red, green, blue
+//       4           red, green, blue, alpha
+//
+// If image loading fails for any reason, the return value will be NULL,
+// and *x, *y, *comp will be unchanged. The function stbi_failure_reason()
+// can be queried for an extremely brief, end-user unfriendly explanation
+// of why the load failed. Define STBI_NO_FAILURE_STRINGS to avoid
+// compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
+// more user-friendly ones.
+//
+// Paletted PNG and BMP images are automatically depalettized.
+//
+//
+// ===========================================================================
+//
+// HDR image support   (disable by defining STBI_NO_HDR)
+//
+// stb_image now supports loading HDR images in general, and currently
+// the Radiance .HDR file format, although the support is provided
+// generically. You can still load any file through the existing interface;
+// if you attempt to load an HDR file, it will be automatically remapped to
+// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
+// both of these constants can be reconfigured through this interface:
+//
+//     stbi_hdr_to_ldr_gamma(2.2f);
+//     stbi_hdr_to_ldr_scale(1.0f);
+//
+// (note, do not use _inverse_ constants; stbi_image will invert them
+// appropriately).
+//
+// Additionally, there is a new, parallel interface for loading files as
+// (linear) floats to preserve the full dynamic range:
+//
+//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
+// 
+// If you load LDR images through this interface, those images will
+// be promoted to floating point values, run through the inverse of
+// constants corresponding to the above:
+//
+//     stbi_ldr_to_hdr_scale(1.0f);
+//     stbi_ldr_to_hdr_gamma(2.2f);
+//
+// Finally, given a filename (or an open file or memory block--see header
+// file for details) containing image data, you can query for the "most
+// appropriate" interface to use (that is, whether the image is HDR or
+// not), using:
+//
+//     stbi_is_hdr(char *filename);
+
+#ifndef STBI_NO_STDIO
+#include <stdio.h>
+#endif
+
+#define STBI_VERSION 1
+
+enum
+{
+   STBI_default = 0, // only used for req_comp
+
+   STBI_grey       = 1,
+   STBI_grey_alpha = 2,
+   STBI_rgb        = 3,
+   STBI_rgb_alpha  = 4,
+};
+
+typedef unsigned char stbi_uc;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// WRITING API
+
+#if !defined(STBI_NO_WRITE) && !defined(STBI_NO_STDIO)
+// write a BMP/TGA file given tightly packed 'comp' channels (no padding, nor bmp-stride-padding)
+// (you must include the appropriate extension in the filename).
+// returns TRUE on success, FALSE if couldn't open file, error writing file
+extern int      stbi_write_bmp       (char const *filename,     int x, int y, int comp, void *data);
+extern int      stbi_write_tga       (char const *filename,     int x, int y, int comp, void *data);
+#endif
+
+// PRIMARY API - works on images of any type
+
+// load image by filename, open file, or memory buffer
+#ifndef STBI_NO_STDIO
+extern stbi_uc *stbi_load            (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_load_from_file  (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+extern int      stbi_info_from_file  (FILE *f,                  int *x, int *y, int *comp);
+#endif
+extern stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+// for stbi_load_from_file, file pointer is left pointing immediately after image
+
+#ifndef STBI_NO_HDR
+#ifndef STBI_NO_STDIO
+extern float *stbi_loadf            (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern float *stbi_loadf_from_file  (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+extern float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+
+extern void   stbi_hdr_to_ldr_gamma(float gamma);
+extern void   stbi_hdr_to_ldr_scale(float scale);
+
+extern void   stbi_ldr_to_hdr_gamma(float gamma);
+extern void   stbi_ldr_to_hdr_scale(float scale);
+
+#endif // STBI_NO_HDR
+
+// get a VERY brief reason for failure
+// NOT THREADSAFE
+extern char    *stbi_failure_reason  (void); 
+
+// free the loaded image -- this is just free()
+extern void     stbi_image_free      (void *retval_from_stbi_load);
+
+// get image dimensions & components without fully decoding
+extern int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
+extern int      stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
+#ifndef STBI_NO_STDIO
+extern int      stbi_info            (char const *filename,     int *x, int *y, int *comp);
+extern int      stbi_is_hdr          (char const *filename);
+extern int      stbi_is_hdr_from_file(FILE *f);
+#endif
+
+// ZLIB client - used by PNG, available for other purposes
+
+extern char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
+extern char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
+extern int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
+
+extern char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
+extern int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
+
+// TYPE-SPECIFIC ACCESS
+
+// is it a jpeg?
+extern int      stbi_jpeg_test_memory     (stbi_uc const *buffer, int len);
+extern stbi_uc *stbi_jpeg_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+extern int      stbi_jpeg_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
+
+#ifndef STBI_NO_STDIO
+extern stbi_uc *stbi_jpeg_load            (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern int      stbi_jpeg_test_file       (FILE *f);
+extern stbi_uc *stbi_jpeg_load_from_file  (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+
+extern int      stbi_jpeg_info            (char const *filename,     int *x, int *y, int *comp);
+extern int      stbi_jpeg_info_from_file  (FILE *f,                  int *x, int *y, int *comp);
+#endif
+
+// is it a png?
+extern int      stbi_png_test_memory      (stbi_uc const *buffer, int len);
+extern stbi_uc *stbi_png_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+extern int      stbi_png_info_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp);
+
+#ifndef STBI_NO_STDIO
+extern stbi_uc *stbi_png_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern int      stbi_png_info             (char const *filename,     int *x, int *y, int *comp);
+extern int      stbi_png_test_file        (FILE *f);
+extern stbi_uc *stbi_png_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+extern int      stbi_png_info_from_file   (FILE *f,                  int *x, int *y, int *comp);
+#endif
+
+// is it a bmp?
+extern int      stbi_bmp_test_memory      (stbi_uc const *buffer, int len);
+
+extern stbi_uc *stbi_bmp_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_bmp_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+#ifndef STBI_NO_STDIO
+extern int      stbi_bmp_test_file        (FILE *f);
+extern stbi_uc *stbi_bmp_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+
+// is it a tga?
+extern int      stbi_tga_test_memory      (stbi_uc const *buffer, int len);
+
+extern stbi_uc *stbi_tga_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_tga_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+#ifndef STBI_NO_STDIO
+extern int      stbi_tga_test_file        (FILE *f);
+extern stbi_uc *stbi_tga_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+
+// is it a psd?
+extern int      stbi_psd_test_memory      (stbi_uc const *buffer, int len);
+
+extern stbi_uc *stbi_psd_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_psd_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+#ifndef STBI_NO_STDIO
+extern int      stbi_psd_test_file        (FILE *f);
+extern stbi_uc *stbi_psd_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+
+// is it an hdr?
+extern int      stbi_hdr_test_memory      (stbi_uc const *buffer, int len);
+
+extern float *  stbi_hdr_load             (char const *filename,     int *x, int *y, int *comp, int req_comp);
+extern float *  stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_hdr_load_rgbe        (char const *filename,           int *x, int *y, int *comp, int req_comp);
+extern float *  stbi_hdr_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+#ifndef STBI_NO_STDIO
+extern int      stbi_hdr_test_file        (FILE *f);
+extern float *  stbi_hdr_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_hdr_load_rgbe_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+
+// define new loaders
+typedef struct
+{
+   int       (*test_memory)(stbi_uc const *buffer, int len);
+   stbi_uc * (*load_from_memory)(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+   #ifndef STBI_NO_STDIO
+   int       (*test_file)(FILE *f);
+   stbi_uc * (*load_from_file)(FILE *f, int *x, int *y, int *comp, int req_comp);
+   #endif
+} stbi_loader;
+
+// register a loader by filling out the above structure (you must defined ALL functions)
+// returns 1 if added or already added, 0 if not added (too many loaders)
+// NOT THREADSAFE
+extern int stbi_register_loader(stbi_loader *loader);
+
+// define faster low-level operations (typically SIMD support)
+#if STBI_SIMD
+typedef void (*stbi_idct_8x8)(uint8 *out, int out_stride, short data[64], unsigned short *dequantize);
+// compute an integer IDCT on "input"
+//     input[x] = data[x] * dequantize[x]
+//     write results to 'out': 64 samples, each run of 8 spaced by 'out_stride'
+//                             CLAMP results to 0..255
+typedef void (*stbi_YCbCr_to_RGB_run)(uint8 *output, uint8 const *y, uint8 const *cb, uint8 const *cr, int count, int step);
+// compute a conversion from YCbCr to RGB
+//     'count' pixels
+//     write pixels to 'output'; each pixel is 'step' bytes (either 3 or 4; if 4, write '255' as 4th), order R,G,B
+//     y: Y input channel
+//     cb: Cb input channel; scale/biased to be 0..255
+//     cr: Cr input channel; scale/biased to be 0..255
+
+extern void stbi_install_idct(stbi_idct_8x8 func);
+extern void stbi_install_YCbCr_to_RGB(stbi_YCbCr_to_RGB_run func);
+#endif // STBI_SIMD
+
+#ifdef __cplusplus
+}
+#endif
+
+//
+//
+////   end header file   /////////////////////////////////////////////////////
+#endif // STBI_INCLUDE_STB_IMAGE_H
--- a/5/src/SOIL/stbi_DDS_aug.h
+++ b/5/src/SOIL/stbi_DDS_aug.h
@ -0,0 +1,21 @@
+/*
+	adding DDS loading support to stbi
+*/
+
+#ifndef HEADER_STB_IMAGE_DDS_AUGMENTATION
+#define HEADER_STB_IMAGE_DDS_AUGMENTATION
+
+//	is it a DDS file?
+extern int      stbi_dds_test_memory      (stbi_uc const *buffer, int len);
+
+extern stbi_uc *stbi_dds_load             (char *filename,           int *x, int *y, int *comp, int req_comp);
+extern stbi_uc *stbi_dds_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp);
+#ifndef STBI_NO_STDIO
+extern int      stbi_dds_test_file        (FILE *f);
+extern stbi_uc *stbi_dds_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp);
+#endif
+
+//
+//
+////   end header file   /////////////////////////////////////////////////////
+#endif // HEADER_STB_IMAGE_DDS_AUGMENTATION
--- a/5/src/SOIL/stbi_DDS_aug_c.h
+++ b/5/src/SOIL/stbi_DDS_aug_c.h
@ -0,0 +1,511 @@
+
+///	DDS file support, does decoding, _not_ direct uploading
+///	(use SOIL for that ;-)
+
+///	A bunch of DirectDraw Surface structures and flags
+typedef struct {
+    unsigned int    dwMagic;
+    unsigned int    dwSize;
+    unsigned int    dwFlags;
+    unsigned int    dwHeight;
+    unsigned int    dwWidth;
+    unsigned int    dwPitchOrLinearSize;
+    unsigned int    dwDepth;
+    unsigned int    dwMipMapCount;
+    unsigned int    dwReserved1[ 11 ];
+
+    //  DDPIXELFORMAT
+    struct {
+      unsigned int    dwSize;
+      unsigned int    dwFlags;
+      unsigned int    dwFourCC;
+      unsigned int    dwRGBBitCount;
+      unsigned int    dwRBitMask;
+      unsigned int    dwGBitMask;
+      unsigned int    dwBBitMask;
+      unsigned int    dwAlphaBitMask;
+    }               sPixelFormat;
+
+    //  DDCAPS2
+    struct {
+      unsigned int    dwCaps1;
+      unsigned int    dwCaps2;
+      unsigned int    dwDDSX;
+      unsigned int    dwReserved;
+    }               sCaps;
+    unsigned int    dwReserved2;
+} DDS_header ;
+
+//	the following constants were copied directly off the MSDN website
+
+//	The dwFlags member of the original DDSURFACEDESC2 structure
+//	can be set to one or more of the following values.
+#define DDSD_CAPS	0x00000001
+#define DDSD_HEIGHT	0x00000002
+#define DDSD_WIDTH	0x00000004
+#define DDSD_PITCH	0x00000008
+#define DDSD_PIXELFORMAT	0x00001000
+#define DDSD_MIPMAPCOUNT	0x00020000
+#define DDSD_LINEARSIZE	0x00080000
+#define DDSD_DEPTH	0x00800000
+
+//	DirectDraw Pixel Format
+#define DDPF_ALPHAPIXELS	0x00000001
+#define DDPF_FOURCC	0x00000004
+#define DDPF_RGB	0x00000040
+
+//	The dwCaps1 member of the DDSCAPS2 structure can be
+//	set to one or more of the following values.
+#define DDSCAPS_COMPLEX	0x00000008
+#define DDSCAPS_TEXTURE	0x00001000
+#define DDSCAPS_MIPMAP	0x00400000
+
+//	The dwCaps2 member of the DDSCAPS2 structure can be
+//	set to one or more of the following values.
+#define DDSCAPS2_CUBEMAP	0x00000200
+#define DDSCAPS2_CUBEMAP_POSITIVEX	0x00000400
+#define DDSCAPS2_CUBEMAP_NEGATIVEX	0x00000800
+#define DDSCAPS2_CUBEMAP_POSITIVEY	0x00001000
+#define DDSCAPS2_CUBEMAP_NEGATIVEY	0x00002000
+#define DDSCAPS2_CUBEMAP_POSITIVEZ	0x00004000
+#define DDSCAPS2_CUBEMAP_NEGATIVEZ	0x00008000
+#define DDSCAPS2_VOLUME	0x00200000
+
+static int dds_test(stbi *s)
+{
+	//	check the magic number
+	if (get8(s) != 'D') return 0;
+	if (get8(s) != 'D') return 0;
+	if (get8(s) != 'S') return 0;
+	if (get8(s) != ' ') return 0;
+	//	check header size
+	if (get32le(s) != 124) return 0;
+	return 1;
+}
+#ifndef STBI_NO_STDIO
+int      stbi_dds_test_file        (FILE *f)
+{
+   stbi s;
+   int r,n = ftell(f);
+   start_file(&s,f);
+   r = dds_test(&s);
+   fseek(f,n,SEEK_SET);
+   return r;
+}
+#endif
+
+int      stbi_dds_test_memory      (stbi_uc const *buffer, int len)
+{
+   stbi s;
+   start_mem(&s,buffer, len);
+   return dds_test(&s);
+}
+
+//	helper functions
+int stbi_convert_bit_range( int c, int from_bits, int to_bits )
+{
+	int b = (1 << (from_bits - 1)) + c * ((1 << to_bits) - 1);
+	return (b + (b >> from_bits)) >> from_bits;
+}
+void stbi_rgb_888_from_565( unsigned int c, int *r, int *g, int *b )
+{
+	*r = stbi_convert_bit_range( (c >> 11) & 31, 5, 8 );
+	*g = stbi_convert_bit_range( (c >> 05) & 63, 6, 8 );
+	*b = stbi_convert_bit_range( (c >> 00) & 31, 5, 8 );
+}
+void stbi_decode_DXT1_block(
+			unsigned char uncompressed[16*4],
+			unsigned char compressed[8] )
+{
+	int next_bit = 4*8;
+	int i, r, g, b;
+	int c0, c1;
+	unsigned char decode_colors[4*4];
+	//	find the 2 primary colors
+	c0 = compressed[0] + (compressed[1] << 8);
+	c1 = compressed[2] + (compressed[3] << 8);
+	stbi_rgb_888_from_565( c0, &r, &g, &b );
+	decode_colors[0] = r;
+	decode_colors[1] = g;
+	decode_colors[2] = b;
+	decode_colors[3] = 255;
+	stbi_rgb_888_from_565( c1, &r, &g, &b );
+	decode_colors[4] = r;
+	decode_colors[5] = g;
+	decode_colors[6] = b;
+	decode_colors[7] = 255;
+	if( c0 > c1 )
+	{
+		//	no alpha, 2 interpolated colors
+		decode_colors[8] = (2*decode_colors[0] + decode_colors[4]) / 3;
+		decode_colors[9] = (2*decode_colors[1] + decode_colors[5]) / 3;
+		decode_colors[10] = (2*decode_colors[2] + decode_colors[6]) / 3;
+		decode_colors[11] = 255;
+		decode_colors[12] = (decode_colors[0] + 2*decode_colors[4]) / 3;
+		decode_colors[13] = (decode_colors[1] + 2*decode_colors[5]) / 3;
+		decode_colors[14] = (decode_colors[2] + 2*decode_colors[6]) / 3;
+		decode_colors[15] = 255;
+	} else
+	{
+		//	1 interpolated color, alpha
+		decode_colors[8] = (decode_colors[0] + decode_colors[4]) / 2;
+		decode_colors[9] = (decode_colors[1] + decode_colors[5]) / 2;
+		decode_colors[10] = (decode_colors[2] + decode_colors[6]) / 2;
+		decode_colors[11] = 255;
+		decode_colors[12] = 0;
+		decode_colors[13] = 0;
+		decode_colors[14] = 0;
+		decode_colors[15] = 0;
+	}
+	//	decode the block
+	for( i = 0; i < 16*4; i += 4 )
+	{
+		int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 4;
+		next_bit += 2;
+		uncompressed[i+0] = decode_colors[idx+0];
+		uncompressed[i+1] = decode_colors[idx+1];
+		uncompressed[i+2] = decode_colors[idx+2];
+		uncompressed[i+3] = decode_colors[idx+3];
+	}
+	//	done
+}
+void stbi_decode_DXT23_alpha_block(
+			unsigned char uncompressed[16*4],
+			unsigned char compressed[8] )
+{
+	int i, next_bit = 0;
+	//	each alpha value gets 4 bits
+	for( i = 3; i < 16*4; i += 4 )
+	{
+		uncompressed[i] = stbi_convert_bit_range(
+				(compressed[next_bit>>3] >> (next_bit&7)) & 15,
+				4, 8 );
+		next_bit += 4;
+	}
+}
+void stbi_decode_DXT45_alpha_block(
+			unsigned char uncompressed[16*4],
+			unsigned char compressed[8] )
+{
+	int i, next_bit = 8*2;
+	unsigned char decode_alpha[8];
+	//	each alpha value gets 3 bits, and the 1st 2 bytes are the range
+	decode_alpha[0] = compressed[0];
+	decode_alpha[1] = compressed[1];
+	if( decode_alpha[0] > decode_alpha[1] )
+	{
+		//	6 step intermediate
+		decode_alpha[2] = (6*decode_alpha[0] + 1*decode_alpha[1]) / 7;
+		decode_alpha[3] = (5*decode_alpha[0] + 2*decode_alpha[1]) / 7;
+		decode_alpha[4] = (4*decode_alpha[0] + 3*decode_alpha[1]) / 7;
+		decode_alpha[5] = (3*decode_alpha[0] + 4*decode_alpha[1]) / 7;
+		decode_alpha[6] = (2*decode_alpha[0] + 5*decode_alpha[1]) / 7;
+		decode_alpha[7] = (1*decode_alpha[0] + 6*decode_alpha[1]) / 7;
+	} else
+	{
+		//	4 step intermediate, pluss full and none
+		decode_alpha[2] = (4*decode_alpha[0] + 1*decode_alpha[1]) / 5;
+		decode_alpha[3] = (3*decode_alpha[0] + 2*decode_alpha[1]) / 5;
+		decode_alpha[4] = (2*decode_alpha[0] + 3*decode_alpha[1]) / 5;
+		decode_alpha[5] = (1*decode_alpha[0] + 4*decode_alpha[1]) / 5;
+		decode_alpha[6] = 0;
+		decode_alpha[7] = 255;
+	}
+	for( i = 3; i < 16*4; i += 4 )
+	{
+		int idx = 0, bit;
+		bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
+		idx += bit << 0;
+		++next_bit;
+		bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
+		idx += bit << 1;
+		++next_bit;
+		bit = (compressed[next_bit>>3] >> (next_bit&7)) & 1;
+		idx += bit << 2;
+		++next_bit;
+		uncompressed[i] = decode_alpha[idx & 7];
+	}
+	//	done
+}
+void stbi_decode_DXT_color_block(
+			unsigned char uncompressed[16*4],
+			unsigned char compressed[8] )
+{
+	int next_bit = 4*8;
+	int i, r, g, b;
+	int c0, c1;
+	unsigned char decode_colors[4*3];
+	//	find the 2 primary colors
+	c0 = compressed[0] + (compressed[1] << 8);
+	c1 = compressed[2] + (compressed[3] << 8);
+	stbi_rgb_888_from_565( c0, &r, &g, &b );
+	decode_colors[0] = r;
+	decode_colors[1] = g;
+	decode_colors[2] = b;
+	stbi_rgb_888_from_565( c1, &r, &g, &b );
+	decode_colors[3] = r;
+	decode_colors[4] = g;
+	decode_colors[5] = b;
+	//	Like DXT1, but no choicees:
+	//	no alpha, 2 interpolated colors
+	decode_colors[6] = (2*decode_colors[0] + decode_colors[3]) / 3;
+	decode_colors[7] = (2*decode_colors[1] + decode_colors[4]) / 3;
+	decode_colors[8] = (2*decode_colors[2] + decode_colors[5]) / 3;
+	decode_colors[9] = (decode_colors[0] + 2*decode_colors[3]) / 3;
+	decode_colors[10] = (decode_colors[1] + 2*decode_colors[4]) / 3;
+	decode_colors[11] = (decode_colors[2] + 2*decode_colors[5]) / 3;
+	//	decode the block
+	for( i = 0; i < 16*4; i += 4 )
+	{
+		int idx = ((compressed[next_bit>>3] >> (next_bit & 7)) & 3) * 3;
+		next_bit += 2;
+		uncompressed[i+0] = decode_colors[idx+0];
+		uncompressed[i+1] = decode_colors[idx+1];
+		uncompressed[i+2] = decode_colors[idx+2];
+	}
+	//	done
+}
+static stbi_uc *dds_load(stbi *s, int *x, int *y, int *comp, int req_comp)
+{
+	//	all variables go up front
+	stbi_uc *dds_data = NULL;
+	stbi_uc block[16*4];
+	stbi_uc compressed[8];
+	int flags, DXT_family;
+	int has_alpha, has_mipmap;
+	int is_compressed, cubemap_faces;
+	int block_pitch, num_blocks;
+	DDS_header header;
+	int i, sz, cf;
+	//	load the header
+	if( sizeof( DDS_header ) != 128 )
+	{
+		return NULL;
+	}
+	getn( s, (stbi_uc*)(&header), 128 );
+	//	and do some checking
+	if( header.dwMagic != (('D' << 0) | ('D' << 8) | ('S' << 16) | (' ' << 24)) ) return NULL;
+	if( header.dwSize != 124 ) return NULL;
+	flags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
+	if( (header.dwFlags & flags) != flags ) return NULL;
+	/*	According to the MSDN spec, the dwFlags should contain
+		DDSD_LINEARSIZE if it's compressed, or DDSD_PITCH if
+		uncompressed.  Some DDS writers do not conform to the
+		spec, so I need to make my reader more tolerant	*/
+	if( header.sPixelFormat.dwSize != 32 ) return NULL;
+	flags = DDPF_FOURCC | DDPF_RGB;
+	if( (header.sPixelFormat.dwFlags & flags) == 0 ) return NULL;
+	if( (header.sCaps.dwCaps1 & DDSCAPS_TEXTURE) == 0 ) return NULL;
+	//	get the image data
+	s->img_x = header.dwWidth;
+	s->img_y = header.dwHeight;
+	s->img_n = 4;
+	is_compressed = (header.sPixelFormat.dwFlags & DDPF_FOURCC) / DDPF_FOURCC;
+	has_alpha = (header.sPixelFormat.dwFlags & DDPF_ALPHAPIXELS) / DDPF_ALPHAPIXELS;
+	has_mipmap = (header.sCaps.dwCaps1 & DDSCAPS_MIPMAP) && (header.dwMipMapCount > 1);
+	cubemap_faces = (header.sCaps.dwCaps2 & DDSCAPS2_CUBEMAP) / DDSCAPS2_CUBEMAP;
+	/*	I need cubemaps to have square faces	*/
+	cubemap_faces &= (s->img_x == s->img_y);
+	cubemap_faces *= 5;
+	cubemap_faces += 1;
+	block_pitch = (s->img_x+3) >> 2;
+	num_blocks = block_pitch * ((s->img_y+3) >> 2);
+	/*	let the user know what's going on	*/
+	*x = s->img_x;
+	*y = s->img_y;
+	*comp = s->img_n;
+	/*	is this uncompressed?	*/
+	if( is_compressed )
+	{
+		/*	compressed	*/
+		//	note: header.sPixelFormat.dwFourCC is something like (('D'<<0)|('X'<<8)|('T'<<16)|('1'<<24))
+		DXT_family = 1 + (header.sPixelFormat.dwFourCC >> 24) - '1';
+		if( (DXT_family < 1) || (DXT_family > 5) ) return NULL;
+		/*	check the expected size...oops, nevermind...
+			those non-compliant writers leave
+			dwPitchOrLinearSize == 0	*/
+		//	passed all the tests, get the RAM for decoding
+		sz = (s->img_x)*(s->img_y)*4*cubemap_faces;
+		dds_data = (unsigned char*)malloc( sz );
+		/*	do this once for each face	*/
+		for( cf = 0; cf < cubemap_faces; ++ cf )
+		{
+			//	now read and decode all the blocks
+			for( i = 0; i < num_blocks; ++i )
+			{
+				//	where are we?
+				int bx, by, bw=4, bh=4;
+				int ref_x = 4 * (i % block_pitch);
+				int ref_y = 4 * (i / block_pitch);
+				//	get the next block's worth of compressed data, and decompress it
+				if( DXT_family == 1 )
+				{
+					//	DXT1
+					getn( s, compressed, 8 );
+					stbi_decode_DXT1_block( block, compressed );
+				} else if( DXT_family < 4 )
+				{
+					//	DXT2/3
+					getn( s, compressed, 8 );
+					stbi_decode_DXT23_alpha_block ( block, compressed );
+					getn( s, compressed, 8 );
+					stbi_decode_DXT_color_block ( block, compressed );
+				} else
+				{
+					//	DXT4/5
+					getn( s, compressed, 8 );
+					stbi_decode_DXT45_alpha_block ( block, compressed );
+					getn( s, compressed, 8 );
+					stbi_decode_DXT_color_block ( block, compressed );
+				}
+				//	is this a partial block?
+				if( ref_x + 4 > s->img_x )
+				{
+					bw = s->img_x - ref_x;
+				}
+				if( ref_y + 4 > s->img_y )
+				{
+					bh = s->img_y - ref_y;
+				}
+				//	now drop our decompressed data into the buffer
+				for( by = 0; by < bh; ++by )
+				{
+					int idx = 4*((ref_y+by+cf*s->img_x)*s->img_x + ref_x);
+					for( bx = 0; bx < bw*4; ++bx )
+					{
+
+						dds_data[idx+bx] = block[by*16+bx];
+					}
+				}
+			}
+			/*	done reading and decoding the main image...
+				skip MIPmaps if present	*/
+			if( has_mipmap )
+			{
+				int block_size = 16;
+				if( DXT_family == 1 )
+				{
+					block_size = 8;
+				}
+				for( i = 1; i < header.dwMipMapCount; ++i )
+				{
+					int mx = s->img_x >> (i + 2);
+					int my = s->img_y >> (i + 2);
+					if( mx < 1 )
+					{
+						mx = 1;
+					}
+					if( my < 1 )
+					{
+						my = 1;
+					}
+					skip( s, mx*my*block_size );
+				}
+			}
+		}/* per cubemap face */
+	} else
+	{
+		/*	uncompressed	*/
+		DXT_family = 0;
+		s->img_n = 3;
+		if( has_alpha )
+		{
+			s->img_n = 4;
+		}
+		*comp = s->img_n;
+		sz = s->img_x*s->img_y*s->img_n*cubemap_faces;
+		dds_data = (unsigned char*)malloc( sz );
+		/*	do this once for each face	*/
+		for( cf = 0; cf < cubemap_faces; ++ cf )
+		{
+			/*	read the main image for this face	*/
+			getn( s, &dds_data[cf*s->img_x*s->img_y*s->img_n], s->img_x*s->img_y*s->img_n );
+			/*	done reading and decoding the main image...
+				skip MIPmaps if present	*/
+			if( has_mipmap )
+			{
+				for( i = 1; i < header.dwMipMapCount; ++i )
+				{
+					int mx = s->img_x >> i;
+					int my = s->img_y >> i;
+					if( mx < 1 )
+					{
+						mx = 1;
+					}
+					if( my < 1 )
+					{
+						my = 1;
+					}
+					skip( s, mx*my*s->img_n );
+				}
+			}
+		}
+		/*	data was BGR, I need it RGB	*/
+		for( i = 0; i < sz; i += s->img_n )
+		{
+			unsigned char temp = dds_data[i];
+			dds_data[i] = dds_data[i+2];
+			dds_data[i+2] = temp;
+		}
+	}
+	/*	finished decompressing into RGBA,
+		adjust the y size if we have a cubemap
+		note: sz is already up to date	*/
+	s->img_y *= cubemap_faces;
+	*y = s->img_y;
+	//	did the user want something else, or
+	//	see if all the alpha values are 255 (i.e. no transparency)
+	has_alpha = 0;
+	if( s->img_n == 4)
+	{
+		for( i = 3; (i < sz) && (has_alpha == 0); i += 4 )
+		{
+			has_alpha |= (dds_data[i] < 255);
+		}
+	}
+	if( (req_comp <= 4) && (req_comp >= 1) )
+	{
+		//	user has some requirements, meet them
+		if( req_comp != s->img_n )
+		{
+			dds_data = convert_format( dds_data, s->img_n, req_comp, s->img_x, s->img_y );
+			*comp = s->img_n;
+		}
+	} else
+	{
+		//	user had no requirements, only drop to RGB is no alpha
+		if( (has_alpha == 0) && (s->img_n == 4) )
+		{
+			dds_data = convert_format( dds_data, 4, 3, s->img_x, s->img_y );
+			*comp = 3;
+		}
+	}
+	//	OK, done
+	return dds_data;
+}
+
+#ifndef STBI_NO_STDIO
+stbi_uc *stbi_dds_load_from_file   (FILE *f,                  int *x, int *y, int *comp, int req_comp)
+{
+	stbi s;
+   start_file(&s,f);
+   return dds_load(&s,x,y,comp,req_comp);
+}
+
+stbi_uc *stbi_dds_load             (char *filename,           int *x, int *y, int *comp, int req_comp)
+{
+   stbi_uc *data;
+   FILE *f = fopen(filename, "rb");
+   if (!f) return NULL;
+   data = stbi_dds_load_from_file(f,x,y,comp,req_comp);
+   fclose(f);
+   return data;
+}
+#endif
+
+stbi_uc *stbi_dds_load_from_memory (stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
+{
+	stbi s;
+   start_mem(&s,buffer, len);
+   return dds_load(&s,x,y,comp,req_comp);
+}
--- a/5/src/Shader_Loader.cpp
+++ b/5/src/Shader_Loader.cpp
@ -0,0 +1,102 @@
+#include "Shader_Loader.h" 
+#include<iostream>
+#include<fstream>
+#include<vector>
+
+using namespace Core;
+
+Shader_Loader::Shader_Loader(void){}
+Shader_Loader::~Shader_Loader(void){}
+
+std::string Shader_Loader::ReadShader(char *filename)
+{
+
+	std::string shaderCode;
+	std::ifstream file(filename, std::ios::in);
+
+	if (!file.good())
+	{
+		std::cout << "Can't read file " << filename << std::endl;
+		std::terminate();
+	}
+
+	file.seekg(0, std::ios::end);
+	shaderCode.resize((unsigned int)file.tellg());
+	file.seekg(0, std::ios::beg);
+	file.read(&shaderCode[0], shaderCode.size());
+	file.close();
+	return shaderCode;
+}
+
+GLuint Shader_Loader::CreateShader(GLenum shaderType, std::string
+	source, char* shaderName)
+{
+
+	int compile_result = 0;
+
+	GLuint shader = glCreateShader(shaderType);
+	const char *shader_code_ptr = source.c_str();
+	const int shader_code_size = source.size();
+
+	glShaderSource(shader, 1, &shader_code_ptr, &shader_code_size);
+	glCompileShader(shader);
+	glGetShaderiv(shader, GL_COMPILE_STATUS, &compile_result);
+
+	//sprawdz bledy
+	if (compile_result == GL_FALSE)
+	{
+
+		int info_log_length = 0;
+		glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_log_length);
+		std::vector<char> shader_log(info_log_length);
+		glGetShaderInfoLog(shader, info_log_length, NULL, &shader_log[0]);
+		std::cout << "ERROR compiling shader: " << shaderName << std::endl << &shader_log[0] << std::endl;
+		return 0;
+	}
+
+	return shader;
+}
+
+GLuint Shader_Loader::CreateProgram(char* vertexShaderFilename,
+	char* fragmentShaderFilename)
+{
+
+	//wczytaj shadery
+	std::string vertex_shader_code = ReadShader(vertexShaderFilename);
+	std::string fragment_shader_code = ReadShader(fragmentShaderFilename);
+
+	GLuint vertex_shader = CreateShader(GL_VERTEX_SHADER, vertex_shader_code, "vertex shader");
+	GLuint fragment_shader = CreateShader(GL_FRAGMENT_SHADER, fragment_shader_code, "fragment shader");
+
+	int link_result = 0;
+	//stworz shader
+	GLuint program = glCreateProgram();
+	glAttachShader(program, vertex_shader);
+	glAttachShader(program, fragment_shader);
+
+	glLinkProgram(program);
+	glGetProgramiv(program, GL_LINK_STATUS, &link_result);
+	//sprawdz bledy w linkerze
+	if (link_result == GL_FALSE)
+	{
+
+		int info_log_length = 0;
+		glGetProgramiv(program, GL_INFO_LOG_LENGTH, &info_log_length);
+		std::vector<char> program_log(info_log_length);
+		glGetProgramInfoLog(program, info_log_length, NULL, &program_log[0]);
+		std::cout << "Shader Loader : LINK ERROR" << std::endl << &program_log[0] << std::endl;
+		return 0;
+	}
+
+	glDetachShader(program, vertex_shader);
+	glDetachShader(program, fragment_shader);
+	glDeleteShader(vertex_shader);
+	glDeleteShader(fragment_shader);
+
+	return program;
+}
+
+void Shader_Loader::DeleteProgram( GLuint program )
+{
+	glDeleteProgram(program);
+}
--- a/5/src/Shader_Loader.h
+++ b/5/src/Shader_Loader.h
@ -0,0 +1,29 @@
+#pragma once
+
+#include "glew.h"
+#include "freeglut.h"
+#include <iostream>
+
+namespace Core
+{
+
+	class Shader_Loader
+	{
+	private:
+
+		std::string ReadShader(char *filename);
+		GLuint CreateShader(GLenum shaderType,
+			std::string source,
+			char* shaderName);
+
+	public:
+
+		Shader_Loader(void);
+		~Shader_Loader(void);
+		GLuint CreateProgram(char* VertexShaderFilename,
+			char* FragmentShaderFilename);
+
+		void DeleteProgram(GLuint program);
+
+	};
+}
--- a/5/src/ex_5_1.hpp
+++ b/5/src/ex_5_1.hpp
@ -0,0 +1,267 @@
+#include "glew.h"
+#include <GLFW/glfw3.h>
+#include "glm.hpp"
+#include "ext.hpp"
+#include <iostream>
+#include <cmath>
+
+#include "Shader_Loader.h"
+#include "Render_Utils.h"
+#include "Camera.h"
+
+#include "Box.cpp"
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+#include <string>
+
+
+
+GLuint program;
+
+
+Core::Shader_Loader shaderLoader;
+
+Core::RenderContext shipContext;
+Core::RenderContext sphereContext;
+
+glm::vec3 cameraPos = glm::vec3(-4.f, 0, 0);
+glm::vec3 cameraDir = glm::vec3(1.f, 0.f, 0.f);
+glm::vec3 lightColor = glm::vec3(1.f, 1.f, 1.f);
+glm::vec3 lightDir = glm::vec3(0.5, 0.5, 0.5);
+
+glm::vec3 spaceshipPos = glm::vec3(-4.f, 0, 0);
+glm::vec3 spaceshipDir = glm::vec3(1.f, 0.f, 0.f);
+GLuint VAO,VBO;
+
+float aspectRatio = 1.f;
+
+float lastTime = -1.f;
+float deltaTime = 0.f;
+
+float exposition = 5.0f;
+
+GLuint programSun;
+
+void updateDeltaTime(float time) {
+	if (lastTime < 0) {
+		lastTime = time;
+		return;
+	}
+	
+	deltaTime = time - lastTime;
+	if (deltaTime > 0.1) deltaTime = 0.1;
+	lastTime = time;
+}
+
+glm::mat4 createCameraMatrix()
+{
+	glm::vec3 cameraSide = glm::normalize(glm::cross(cameraDir,glm::vec3(0.f,1.f,0.f)));
+	glm::vec3 cameraUp = glm::normalize(glm::cross(cameraSide,cameraDir));
+	glm::mat4 cameraRotrationMatrix = glm::mat4({
+		cameraSide.x,cameraSide.y,cameraSide.z,0,
+		cameraUp.x,cameraUp.y,cameraUp.z ,0,
+		-cameraDir.x,-cameraDir.y,-cameraDir.z,0,
+		0.,0.,0.,1.,
+		});
+	cameraRotrationMatrix = glm::transpose(cameraRotrationMatrix);
+	glm::mat4 cameraMatrix = cameraRotrationMatrix * glm::translate(-cameraPos);
+
+	return cameraMatrix;
+}
+
+glm::mat4 createPerspectiveMatrix()
+{
+	
+	glm::mat4 perspectiveMatrix;
+	float n = 0.05;
+	float f = 20.;
+	float a1 = glm::min(aspectRatio, 1.f);
+	float a2 = glm::min(1 / aspectRatio, 1.f);
+	perspectiveMatrix = glm::mat4({
+		1,0.,0.,0.,
+		0.,aspectRatio,0.,0.,
+		0.,0.,(f+n) / (n - f),2*f * n / (n - f),
+		0.,0.,-1.,0.,
+		});
+
+	
+	perspectiveMatrix=glm::transpose(perspectiveMatrix);
+
+	return perspectiveMatrix;
+}
+
+void drawObjectColor(Core::RenderContext& context, glm::mat4 modelMatrix, glm::vec3 color, GLuint program) {
+	glUseProgram(program);
+	glm::mat4 viewProjectionMatrix = createPerspectiveMatrix() * createCameraMatrix();
+	glm::mat4 transformation = viewProjectionMatrix * modelMatrix;
+	glUniformMatrix4fv(glGetUniformLocation(program, "transformation"), 1, GL_FALSE, (float*)&transformation);
+	glUniform3f(glGetUniformLocation(program, "color"), color.x,color.y,color.z);
+
+	glUniformMatrix4fv(glGetUniformLocation(program, "modelMatrix"), 1, GL_FALSE, glm::value_ptr(modelMatrix));
+
+	glm::vec3 lightDir = glm::normalize(glm::vec3(1.0f, 1.0f, 1.0f));
+	glm::vec3 lightColor = glm::vec3(0.0f, 1.0f, 1.0f);
+
+	glUniform3fv(glGetUniformLocation(program, "lightDir"), 1, glm::value_ptr(lightDir));
+	glUniform3fv(glGetUniformLocation(program, "lightColor"), 1, glm::value_ptr(lightColor));
+
+	glUniform3fv(glGetUniformLocation(program, "cameraPos"), 1, glm::value_ptr(cameraPos));
+	
+	glUniform1f(glGetUniformLocation(program, "exposition"), exposition);
+
+	Core::DrawContext(context);
+	glUseProgram(0);
+
+}
+void renderScene(GLFWwindow* window)
+{
+	glClearColor(0.0f, 0.3f, 0.3f, 1.0f);
+	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glm::mat4 transformation;
+	float time = glfwGetTime();
+	updateDeltaTime(time);
+
+
+	//Uniform3fv(glGetUniformLocation(program, "lightDir"), 1, glm::value_ptr(lightDir));
+	//glUniform3fv(glGetUniformLocation(program, "lightColor"), 1, glm::value_ptr(lightColor));
+
+	
+
+	glm::vec3 sunPosition = glm::vec3(0.0, 0.0, 0.0);
+	glm::mat4 sunModelMatrix = glm::translate(glm::vec3(1.0f, 1.0f, 0.3f));
+	drawObjectColor(sphereContext, sunModelMatrix, glm::vec3(1.0, 1.0, 0.3), programSun);
+
+	glUniform3fv(glGetUniformLocation(program, "lightPos"), 1, glm::value_ptr(sunPosition));
+
+	drawObjectColor(sphereContext, glm::eulerAngleY(time / 3) * glm::translate(glm::vec3(4.f, 0, 0)) * glm::scale(glm::vec3(0.3f)), glm::vec3(0.2, 0.7, 0.3), program);
+
+	drawObjectColor(sphereContext,
+		glm::eulerAngleY(time / 3) * glm::translate(glm::vec3(4.f, 0, 0)) * glm::eulerAngleY(time) * glm::translate(glm::vec3(1.f, 0, 0)) * glm::scale(glm::vec3(0.1f)),
+		glm::vec3(0.5, 0.5, 0.5), program);
+
+	glm::vec3 spaceshipSide = glm::normalize(glm::cross(spaceshipDir, glm::vec3(0.f, 1.f, 0.f)));
+	glm::vec3 spaceshipUp = glm::normalize(glm::cross(spaceshipSide, spaceshipDir));
+	glm::mat4 specshipCameraRotrationMatrix = glm::mat4({
+		spaceshipSide.x,spaceshipSide.y,spaceshipSide.z,0,
+		spaceshipUp.x,spaceshipUp.y,spaceshipUp.z ,0,
+		-spaceshipDir.x,-spaceshipDir.y,-spaceshipDir.z,0,
+		0.,0.,0.,1.,
+		});
+
+
+	//drawObjectColor(shipContext,
+	//	glm::translate(cameraPos + 1.5 * cameraDir + cameraUp * -0.5f) * inveseCameraRotrationMatrix * glm::eulerAngleY(glm::pi<float>()),
+	//	glm::vec3(0.3, 0.3, 0.5)
+	//	);
+	drawObjectColor(shipContext,
+		glm::translate(spaceshipPos) * specshipCameraRotrationMatrix * glm::eulerAngleY(glm::pi<float>()) * glm::scale(glm::vec3(0.2f)),
+		glm::vec3(0.3, 0.3, 0.5),
+		program
+		);
+
+	
+	glfwSwapBuffers(window);
+}
+void framebuffer_size_callback(GLFWwindow* window, int width, int height)
+{
+	aspectRatio = width / float(height);
+	glViewport(0, 0, width, height);
+}
+void loadModelToContext(std::string path, Core::RenderContext& context)
+{
+	Assimp::Importer import;
+	const aiScene* scene = import.ReadFile(path, aiProcess_Triangulate | aiProcess_CalcTangentSpace);
+
+	if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode)
+	{
+		std::cout << "ERROR::ASSIMP::" << import.GetErrorString() << std::endl;
+		return;
+	}
+	context.initFromAssimpMesh(scene->mMeshes[0]);
+}
+
+void init(GLFWwindow* window)
+{
+	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+	glEnable(GL_DEPTH_TEST);
+	program = shaderLoader.CreateProgram("shaders/shader_5_1.vert", "shaders/shader_5_1.frag");
+
+	programSun = shaderLoader.CreateProgram("shaders/shader_5_sun.vert", "shaders/shader_5_sun.frag");
+
+	loadModelToContext("./models/sphere.obj", sphereContext);
+	loadModelToContext("./models/spaceship.obj", shipContext);
+
+
+	// Ustaw wartości dla lightDir i lightColor potem prześlij do shadera
+	//glm::vec3 lightDir = glm::normalize(glm::vec3(1.0f, 1.0f, 1.0f));
+	//glm::vec3 lightColor = glm::vec3(0.0f, 1.0f, 1.0f);  
+
+	//glUseProgram(program);
+	//glUniform3fv(glGetUniformLocation(program, "lightDir"), 1, glm::value_ptr(lightDir));
+	//glUniform3fv(glGetUniformLocation(program, "lightColor"), 1, glm::value_ptr(lightColor));
+	//glUseProgram(0);
+
+}
+
+void shutdown(GLFWwindow* window)
+{
+	shaderLoader.DeleteProgram(program);
+}
+
+//obsluga wejscia
+void processInput(GLFWwindow* window)
+{
+	glm::vec3 spaceshipSide = glm::normalize(glm::cross(spaceshipDir, glm::vec3(0.f, 1.f, 0.f)));
+	glm::vec3 spaceshipUp = glm::vec3(0.f, 1.f, 0.f);
+	float angleSpeed = 0.05f * deltaTime * 60;
+	float moveSpeed = 0.05f * deltaTime * 60;
+	if (glfwGetKey(window, GLFW_KEY_LEFT_SHIFT) == GLFW_PRESS) {
+		angleSpeed *= 3;
+		moveSpeed *= 3;
+	}
+	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS) {
+		glfwSetWindowShouldClose(window, true);
+	}
+	if (glfwGetKey(window, GLFW_KEY_W) == GLFW_PRESS)
+		spaceshipPos += spaceshipDir * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_S) == GLFW_PRESS)
+		spaceshipPos -= spaceshipDir * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_X) == GLFW_PRESS)
+		spaceshipPos += spaceshipSide * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_Z) == GLFW_PRESS)
+		spaceshipPos -= spaceshipSide * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_Q) == GLFW_PRESS)
+		spaceshipPos += spaceshipUp * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_E) == GLFW_PRESS)
+		spaceshipPos -= spaceshipUp * moveSpeed;
+	if (glfwGetKey(window, GLFW_KEY_A) == GLFW_PRESS)
+		spaceshipDir = glm::vec3(glm::eulerAngleY(angleSpeed) * glm::vec4(spaceshipDir, 0));
+	if (glfwGetKey(window, GLFW_KEY_D) == GLFW_PRESS)
+		spaceshipDir = glm::vec3(glm::eulerAngleY(-angleSpeed) * glm::vec4(spaceshipDir, 0));
+
+	if (glfwGetKey(window, GLFW_KEY_1) == GLFW_PRESS)
+		exposition += 0.1;
+	if (glfwGetKey(window, GLFW_KEY_2) == GLFW_PRESS)
+		exposition -= 0.1;
+	
+
+	cameraPos = spaceshipPos - 0.3f * spaceshipDir + glm::vec3(0, 1, 0) * 0.1f;
+	cameraDir = spaceshipDir;
+
+	//cameraDir = glm::normalize(-cameraPos);
+
+}
+
+// funkcja jest glowna petla
+void renderLoop(GLFWwindow* window) {
+	while (!glfwWindowShouldClose(window))
+	{
+		processInput(window);
+
+		renderScene(window);
+		glfwPollEvents();
+	}
+}
+//}
--- a/5/src/main.cpp
+++ b/5/src/main.cpp
@ -0,0 +1,47 @@
+#include "glew.h"
+
+#include <GLFW/glfw3.h>
+#include "glm.hpp"
+#include "ext.hpp"
+#include <iostream>
+#include <cmath>
+
+#include "ex_5_1.hpp"
+
+
+
+int main(int argc, char** argv)
+{
+	// inicjalizacja glfw
+	glfwInit();
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+#ifdef __APPLE__
+	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+
+	// tworzenie okna za pomoca glfw
+	GLFWwindow* window = glfwCreateWindow(500, 500, "FirstWindow", NULL, NULL);
+	if (window == NULL)
+	{
+		std::cout << "Failed to create GLFW window" << std::endl;
+		glfwTerminate();
+		return -1;
+	}
+	glfwMakeContextCurrent(window);
+
+	// ladowanie OpenGL za pomoca glew
+	glewInit();
+	glViewport(0, 0, 500, 500);
+
+	init(window);
+
+	// uruchomienie glownej petli
+	renderLoop(window);
+
+	shutdown(window);
+	glfwTerminate();
+	return 0;
+}
--- a/5/src/objload.h
+++ b/5/src/objload.h
@ -0,0 +1,291 @@
+/* Copyright (c) 2012, Gerhard Reitmayr
+   All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met: 
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer. 
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution. 
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+#ifndef OBJLOAD_H_
+#define OBJLOAD_H_
+
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+#include <string>
+#include <map>
+#include <set>
+#include <vector>
+
+namespace obj {
+
+struct Model {
+    std::vector<float> vertex; //< 3 * N entries
+    std::vector<float> texCoord; //< 2 * N entries
+    std::vector<float> normal; //< 3 * N entries
+    
+    std::map<std::string, std::vector<unsigned short> > faces; //< assume triangels and uniform indexing
+};
+
+struct ObjModel {
+    struct FaceVertex {
+        FaceVertex() : v(-1), t(-1), n(-1) {}
+        int v, t, n;
+        
+        bool operator<( const FaceVertex & other ) const;
+        bool operator==( const FaceVertex & other ) const;
+    };
+    
+    typedef std::pair<std::vector<FaceVertex>, std::vector<unsigned> > FaceList;
+
+    std::vector<float> vertex; //< 3 * N entries
+    std::vector<float> texCoord; //< 2 * N entries
+    std::vector<float> normal; //< 3 * N entries
+
+    std::map<std::string, FaceList > faces;
+};
+
+inline ObjModel parseObjModel( std::istream & in);
+inline void tesselateObjModel( ObjModel & obj);
+inline ObjModel tesselateObjModel( const ObjModel & obj );
+inline Model convertToModel( const ObjModel & obj );
+
+inline Model loadModel( std::istream & in );
+inline Model loadModelFromString( const std::string & in );
+inline Model loadModelFromFile( const std::string & in );
+
+inline std::ostream & operator<<( std::ostream & out, const Model & m );
+inline std::ostream & operator<<( std::ostream & out, const ObjModel::FaceVertex & f);
+
+// ---------------------------- Implementation starts here -----------------------
+
+inline bool ObjModel::FaceVertex::operator<( const ObjModel::FaceVertex & other ) const {
+    return (v < other.v) || (v == other.v && t < other.t ) || (v == other.v && t == other.t && n < other.n);
+}
+
+inline bool ObjModel::FaceVertex::operator==( const ObjModel::FaceVertex & other ) const {
+    return (v == other.v && t == other.t && n == other.n);
+}
+
+template <typename T>
+inline std::istream & operator>>(std::istream & in, std::vector<T> & vec ){
+    T temp;
+    if(in >> temp) 
+        vec.push_back(temp);
+    return in;
+}
+
+template <typename T>
+inline std::istream & operator>>(std::istream & in, std::set<T> & vec ){
+    T temp;
+    if(in >> temp) 
+        vec.insert(temp);
+    return in;
+}
+
+inline std::istream & operator>>( std::istream & in, ObjModel::FaceVertex & f){
+    if(in >> f.v){
+        if(in.peek() == '/'){
+            in.get();
+            in >> f.t;
+            in.clear();
+            if(in.peek() == '/'){
+                in.get();
+                in >> f.n;
+                in.clear();
+            }
+        }
+        in.clear();
+        --f.v;
+        --f.t;
+        --f.n;
+    }
+    // std::cout << f << std::endl;
+    return in;
+}
+
+ObjModel parseObjModel( std::istream & in ){
+    char line[1024];
+    std::string op;
+    std::istringstream line_in;
+    std::set<std::string> groups;
+    groups.insert("default");
+
+    ObjModel data;
+
+    while(in.good()){
+        in.getline(line, 1023);
+        line_in.clear();
+        line_in.str(line);
+
+        if(!(line_in >> op))
+            continue;
+        if(op == "v")
+            line_in >> data.vertex >> data.vertex >> data.vertex;
+        else if(op == "vt")
+            line_in >> data.texCoord >> data.texCoord >> data.texCoord;
+        else if(op == "vn")
+            line_in >> data.normal >> data.normal >> data.normal;
+        else if(op == "g"){
+            groups.clear();
+            while(line_in >> groups) ;
+            groups.insert("default");
+        }
+        else if(op == "f") {
+            std::vector<ObjModel::FaceVertex> list;
+            while(line_in >> list) ;
+            
+            for(std::set<std::string>::const_iterator g = groups.begin(); g != groups.end(); ++g){
+                ObjModel::FaceList & fl = data.faces[*g];
+                fl.second.push_back(fl.first.size());
+                fl.first.insert(fl.first.end(), list.begin(), list.end());
+            }
+        }
+    }
+    for(std::map<std::string, ObjModel::FaceList>::iterator g = data.faces.begin(); g != data.faces.end(); ++g){
+        ObjModel::FaceList & fl = g->second;
+        fl.second.push_back(fl.first.size());
+    }
+    return data;
+}
+
+inline void tesselateObjModel( std::vector<ObjModel::FaceVertex> & input, std::vector<unsigned> & input_start){
+    std::vector<ObjModel::FaceVertex> output;
+    std::vector<unsigned> output_start;
+    output.reserve(input.size());
+    output_start.reserve(input_start.size());
+    
+    for(std::vector<unsigned>::const_iterator s = input_start.begin(); s != input_start.end() - 1; ++s){
+        const unsigned size = *(s+1) - *s;
+        if(size > 3){
+            const ObjModel::FaceVertex & start_vertex = input[*s];
+            for( int i = 1; i < (int)size-1; ++i){
+                output_start.push_back(output.size());
+                output.push_back(start_vertex);
+                output.push_back(input[*s+i]);
+                output.push_back(input[*s+i+1]);
+            }
+        } else {
+            output_start.push_back(output.size());
+            output.insert(output.end(), input.begin() + *s, input.begin() + *(s+1));
+        }
+    }
+    output_start.push_back(output.size());
+    input.swap(output);
+    input_start.swap(output_start);
+}
+
+void tesselateObjModel( ObjModel & obj){
+    for(std::map<std::string, ObjModel::FaceList>::iterator g = obj.faces.begin(); g != obj.faces.end(); ++g){
+        ObjModel::FaceList & fl = g->second;
+        tesselateObjModel(fl.first, fl.second);
+    }
+}
+
+Model convertToModel( const ObjModel & obj ) {
+    // insert all face vertices into a vector and make unique
+    std::vector<ObjModel::FaceVertex> unique(obj.faces.find("default")->second.first);
+    std::sort(unique.begin(), unique.end());
+    unique.erase( std::unique(unique.begin(), unique.end()), unique.end());
+
+    // build a new model with repeated vertices/texcoords/normals to have single indexing
+    Model model;
+    for(std::vector<ObjModel::FaceVertex>::const_iterator f = unique.begin(); f != unique.end(); ++f){
+        model.vertex.insert(model.vertex.end(), obj.vertex.begin() + 3*f->v, obj.vertex.begin() + 3*f->v + 3);
+        if(!obj.texCoord.empty()){
+            const int index = (f->t > -1) ? f->t : f->v;
+            model.texCoord.insert(model.texCoord.end(), obj.texCoord.begin() + 2*index, obj.texCoord.begin() + 2*index + 2);
+        }
+        if(!obj.normal.empty()){
+            const int index = (f->n > -1) ? f->n : f->v;
+            model.normal.insert(model.normal.end(), obj.normal.begin() + 3*index, obj.normal.begin() + 3*index + 3);
+        }
+    }
+    // look up unique index and transform face descriptions
+    for(std::map<std::string, ObjModel::FaceList>::const_iterator g = obj.faces.begin(); g != obj.faces.end(); ++g){
+        const std::string & name = g->first;
+        const ObjModel::FaceList & fl = g->second;
+        std::vector<unsigned short> & v = model.faces[g->first];
+        v.reserve(fl.first.size());
+        for(std::vector<ObjModel::FaceVertex>::const_iterator f = fl.first.begin(); f != fl.first.end(); ++f){
+            const unsigned short index = std::distance(unique.begin(), std::lower_bound(unique.begin(), unique.end(), *f));
+            v.push_back(index);
+        }
+    }
+    return model;
+}
+
+ObjModel tesselateObjModel( const ObjModel & obj ){
+    ObjModel result = obj;
+    tesselateObjModel(result);
+    return result;
+}
+
+Model loadModel( std::istream & in ){
+    ObjModel model = parseObjModel(in);
+    tesselateObjModel(model);
+    return convertToModel(model);
+}
+
+Model loadModelFromString( const std::string & str ){
+    std::istringstream in(str);
+    return loadModel(in);
+}
+
+Model loadModelFromFile( const std::string & str) {
+    std::ifstream in(str.c_str());
+    return loadModel(in);
+}
+
+inline std::ostream & operator<<( std::ostream & out, const ObjModel::FaceVertex & f){
+    out << f.v << "\t" << f.t << "\t" << f.n;
+    return out;
+}
+
+std::ostream & operator<<( std::ostream & out, const Model & m ){
+    if(!m.vertex.empty()){
+        out << "vertex\n";
+        for(int i = 0; i < (int)m.vertex.size(); ++i)
+            out << m.vertex[i] << (((i % 3) == 2)?"\n":"\t");
+    }
+    if(!m.texCoord.empty()){
+        out << "texCoord\n";
+        for(int i = 0; i < (int)m.texCoord.size(); ++i)
+            out << m.texCoord[i] << (((i % 2) == 1)?"\n":"\t");
+    }
+    if(!m.normal.empty()){
+        out << "normal\n";
+        for(int i = 0; i < (int)m.normal.size(); ++i)
+            out << m.normal[i] << (((i % 3) == 2)?"\n":"\t");
+    }
+    if(!m.faces.empty()){
+        out << "faces\t";
+        for(std::map<std::string, std::vector<unsigned short> >::const_iterator g = m.faces.begin(); g != m.faces.end(); ++g){
+            out << g->first << " ";
+        }
+        out << "\n";
+//        for(int i = 0; i < m.face.size(); ++i)
+//            out << m.face[i] << (((i % 3) == 2)?"\n":"\t");
+    }
+    return out;
+}
+
+} // namespace obj
+
+#endif // OBJLOAD_H_
--- a/5/style.css
+++ b/5/style.css
@ -0,0 +1,107 @@
+html { font-size: 100%; overflow-y: scroll; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; }
+
+body{
+color:#444;
+font-family:Georgia, Palatino, 'Palatino Linotype', Times, 'Times New Roman', serif;
+font-size:12px;
+line-height:1.5em;
+padding:1em;
+margin:auto;
+max-width:42em;
+background:#fefefe;
+}
+
+a{ color: #0645ad; text-decoration:none;}
+a:visited{ color: #0b0080; }
+a:hover{ color: #06e; }
+a:active{ color:#faa700; }
+a:focus{ outline: thin dotted; }
+a:hover, a:active{ outline: 0; }
+
+::-moz-selection{background:rgba(255,255,0,0.3);color:#000}
+::selection{background:rgba(255,255,0,0.3);color:#000}
+
+a::-moz-selection{background:rgba(255,255,0,0.3);color:#0645ad}
+a::selection{background:rgba(255,255,0,0.3);color:#0645ad}
+
+p{
+margin:1em 0;
+}
+
+img{
+max-width:100%;
+}
+
+h1,h2,h3,h4,h5,h6{
+font-weight:normal;
+color:#111;
+line-height:1em;
+}
+h4,h5,h6{ font-weight: bold; }
+h1{ font-size:2.5em; }
+h2{ font-size:2em; }
+h3{ font-size:1.5em; }
+h4{ font-size:1.2em; }
+h5{ font-size:1em; }
+h6{ font-size:0.9em; }
+
+blockquote{
+color:#666666;
+margin:0;
+padding-left: 3em;
+border-left: 0.5em #EEE solid;
+}
+hr { display: block; height: 2px; border: 0; border-top: 1px solid #aaa;border-bottom: 1px solid #eee; margin: 1em 0; padding: 0; }
+pre, code, kbd, samp { color: #000; font-family: monospace, monospace; _font-family: 'courier new', monospace; font-size: 0.98em; }
+pre { white-space: pre; white-space: pre-wrap; word-wrap: break-word; }
+
+b, strong { font-weight: bold; }
+
+dfn { font-style: italic; }
+
+ins { background: #ff9; color: #000; text-decoration: none; }
+
+mark { background: #ff0; color: #000; font-style: italic; font-weight: bold; }
+
+sub, sup { font-size: 75%; line-height: 0; position: relative; vertical-align: baseline; }
+sup { top: -0.5em; }
+sub { bottom: -0.25em; }
+
+ul, ol { margin: 1em 0; padding: 0 0 0 2em; }
+li p:last-child { margin:0 }
+dd { margin: 0 0 0 2em; }
+
+img { border: 0; -ms-interpolation-mode: bicubic; vertical-align: middle; }
+
+table {
+border-collapse: collapse;
+border-spacing: 0;
+width: 100%;
+}
+th { border-bottom: 1px solid black; }
+td { vertical-align: top; }
+
+@media only screen and (min-width: 480px) {
+body{font-size:14px;}
+}
+
+@media only screen and (min-width: 768px) {
+body{font-size:16px;}
+}
+
+@media print {
+  * { background: transparent !important; color: black !important; filter:none !important; -ms-filter: none !important; }
+  body{font-size:12pt; max-width:100%;}
+  a, a:visited { text-decoration: underline; }
+  hr { height: 1px; border:0; border-bottom:1px solid black; }
+  a[href]:after { content: " (" attr(href) ")"; }
+  abbr[title]:after { content: " (" attr(title) ")"; }
+  .ir a:after, a[href^="javascript:"]:after, a[href^="#"]:after { content: ""; }
+  pre, blockquote { border: 1px solid #999; padding-right: 1em; page-break-inside: avoid; }
+  tr, img { page-break-inside: avoid; }
+  img { max-width: 100% !important; }
+  @page :left { margin: 15mm 20mm 15mm 10mm; }
+  @page :right { margin: 15mm 10mm 15mm 20mm; }
+  p, h2, h3 { orphans: 3; widows: 3; }
+  h2, h3 { page-break-after: avoid; }
+}
--- a/5/zadania
+++ b/5/zadania
@ -0,0 +1,116 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" lang="" xml:lang="">
+<head>
+  <meta charset="utf-8" />
+  <meta name="generator" content="pandoc" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
+  <title>Zadania 5</title>
+  <style>
+    code{white-space: pre-wrap;}
+    span.smallcaps{font-variant: small-caps;}
+    span.underline{text-decoration: underline;}
+    div.column{display: inline-block; vertical-align: top; width: 50%;}
+    div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
+    ul.task-list{list-style: none;}
+  </style>
+  <link rel="stylesheet" href="style.css" />
+  <script src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml-full.js" type="text/javascript"></script>
+  <!--[if lt IE 9]>
+    <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
+  <![endif]-->
+</head>
+<body>
+<h2 id="oświetlenie-phonga">Oświetlenie Phonga</h2>
+<p>W trakcie tych zajęć zajmiemy się implementacją modelu oświetlenia Phonga. Na poprzednich zajęciach zbudowaliśmy układ słoneczny. Wykorzystamy go w trakcie tych zajęć. Jeżeli go zrobiłeś, to przekopiuj do <code>ex_5_1.hpp</code> kod z poprzednich zajęć. W przeciwnym wypadku wykorzystaj ten, który jest zaimplementowany w <code>ex_5_1.hpp</code>. W zadaniu będzie nam potrzebny statek latający przed kamerą, jak nie ma tego w Twojej scenie to skopiuj to z <code>ex_5_1.hpp</code>.</p>
+<h2 id="zadanie---diffuse">Zadanie - <em>diffuse</em></h2>
+<p>Oblicz we fragment shaderze oświetlenie obiektu przy użyciu modelu Phonga dla odbicia rozproszonego (*diffuse)</p>
+<p> 1. Przekaż źródło światła. Na razie przyjmiemy kierunkowy model oświetlenia, dlatego źródło będzie opisane jako wektor kierunkowy:</p>
+<ul>
+<li><p>Prześlij do shadera fragmentów zmienna typu <code>uniform vec3</code> (nazwij ją np. <code>lightDir</code>), w której będzie się znajdować wektor kierunkowy.</p></li>
+<li><p>Należy to zrobić podobnie do tego, jak przesyłany jest kolor.</p></li>
+<li><p>Jako kierunek światła wybierz dowolny wektor jednostkowy. (Możesz wziąć dowolny niezerowy wektor następnie go znormalizować).</p></li>
+<li><p>Dodatkowo prześlij drugą zmienną <code>uniform vec3 lightColor</code>, w której umieścimy kolor światła. Prześlij tam wartości ze zmiennej <code>glm::vec3 lightColor</code>.</p></li>
+</ul>
+<ol start="2" type="1">
+<li>Oblicz natężenie w shaderze fragmentów:</li>
+</ol>
+<ul>
+<li><p>prześlij normalne z shadera fragmentów do shadera wierzchołków</p></li>
+<li><p>znormalizuj wektor normalny przed użyciem go w obliczeniach (uśrednianie wektorów normalnych wierzchołków może spowodować, że przestaje one być jednostkowe).</p></li>
+<li><p>Natężenie to iloczyn skalarny wektora normalnego powierzchni i odwrotnego wektora kierunku padania światła. Skorzystaj z funkcji <code>dot</code>.</p></li>
+<li><p>Natężenie nie może być ujemne. Przytnij natężenie do zera przy użyciu: <code>x = max(x, 0.0)</code></p></li>
+</ul>
+<ol start="3" type="1">
+<li>Zastosuj obliczone natężenie, aby zmodyfikować kolor obiektu:</li>
+</ol>
+<ul>
+<li>Przemnóż kolor RGB fragmentu przez obliczone natężenie i przez kolor światła z <code>lightColor</code>.</li>
+</ul>
+<h2 id="zadanie---obsługa-obrotów">Zadanie - obsługa obrotów</h2>
+<p>Dlaczego oświetlenie statku nie zmienia się podczas jego obracania?</p>
+<p>(Wektory normalne są w układzie lokalnym modelu, a wektor padania światła w układzie świata)</p>
+<p>Należy wykonać transformacje wektorów normalnych do przestrzeni świata: - Prześlij macierz modelu rysowanego obiektu (<em>model Matrix</em>) jako osobna zmienna do vertex shadera (<code>uniform mat4</code>).<br />
+- Przemnóż przez te macierz wektor normalny wierzchołka przed przesłaniem go do shadera fragmentów. - Współrzędna <strong>w</strong> dopisana do wektora przed mnożeniem przez macierz powinna być ustawiona na 0. Wynika to z tego, że w przypadku transformacji wektorów reprezentujących kierunki w przestrzeni, nie chcemy dokonywać translacji — np. wektor normalny do powierzchni zależy od orientacji obiektu, ale nie od jego pozycji (przesunięcia) w przestrzeni świata.</p>
+<h2 id="zadanie---specular">Zadanie - <em>specular</em></h2>
+<p>Uzupełnił model o czynnik odbicia zwierciadlanego (<em>specular</em>). W tym celu:</p>
+<ol type="1">
+<li>Potrzebny będzie wektor od rysowanego fragmentu do pozycji kamery:</li>
+</ol>
+<ul>
+<li>Wyślij pozycje kamery (<code>cameraPos</code>) jako kolejna zmienna do fragment shadera.<br />
+</li>
+<li>Podobnie jak wektory normalne prześlij z vertex do fragment shadera pozycje wierzchołków (<code>vertexPosition</code>) w przestrzeni świata (czyli pomnożone przez macierz <strong>modelMatrix</strong>). Pamiętaj, że tym razem wektory reprezentują punkty, a nie kierunki - współrzędna <strong>w</strong> przed mnożeniem musi być ustawiona na 1. W wyniku rasteryzacji otrzymamy w shaderze fragmentu jego pozycję (nazywaną pozycją fragmentu)</li>
+<li>Oblicz wektor <strong>V</strong> (<em>view direction</em>) jako znormalizowaną różnice pozycji kamery i pozycji fragmentu.</li>
+</ul>
+<ol start="2" type="1">
+<li>Oblicz natężenie światła odbitego we <em>fragment shaderze</em>:</li>
+</ol>
+<ul>
+<li>Oblicz wektor kierunku odbicia światła <strong>R</strong> przy użyciu funkcji <a href="https://www.khronos.org/registry/OpenGL-Refpages/gl4/html/reflect.xhtml"><code>reflect</code></a>. Pamiętaj, żeby przesłać do funkcji odwrócony wektor kierunku światła.</li>
+<li>Oblicz natężenie: iloczyn skalarny <strong>V</strong> i <strong>R</strong>, przycięty do zera ( <code>max(...,0.0)</code> ), a następnie podniesiony do wysokiej potęgi (np. 8, 50, 1000), która jest miara połyskliwości powierzchni.</li>
+</ul>
+<ol start="3" type="1">
+<li>Ustal ostateczny kolor piksela na <code>objectColor * diffuse + lightColor * specular</code>. Oznacza to najprostszy przypadek, gdy kolor światła odbitego jest biały.</li>
+</ol>
+<h2 id="zadanie---oświetlenie-punktowe">Zadanie - oświetlenie punktowe</h2>
+<p>W układzie planetarnym obiektem oświetlającym powinno być słońce, dlatego zamień oświetlenie kierunkowe na punktowe:</p>
+<ul>
+<li>Zamiast przesyłać (w <code>lightDir</code>) kierunek światła, prześlij pozycję słońca do fragment shadera (taką jak ustawiłeś w punkcie powyżej) jako uniform vec3 (nazwij go <code>lightPos</code>).</li>
+<li>Oblicz kierunek światła odejmując od pozycji światła pozycję fragmentu, znormalizuj wynik. Zapisz wynik w zmiennej <code>lightDir</code>.<br />
+</li>
+<li>Słońce będzie czarne, nie martw się tym, tylko spójrz na punkt następny.</li>
+</ul>
+<h2 id="zadanie---shader-słońca">Zadanie - shader słońca</h2>
+<p>Źródło światła znajduje się wewnątrz kuli, która reprezentuje słońce, dlatego jest czarna. By to naprawić, utwórz osobny shader, który będzie odpowiadać za renderowanie słońca.</p>
+<p>Celem tego zadania jest stworzenie shadera (<strong>shader_5_sun.vert</strong>_ i <strong>shader_5_sun.frag</strong>), który będzie odpowiadał wyłącznie za rysowanie słońca. Poprzednie shadery (<strong>shader_4_1.vert</strong>_ i <strong>shader_5_1.frag</strong>) nadal mają rysować pozostałe obiekty. a) zainicjalizuj <em>program</em> (shadery): - Pliki <strong>shader_5_sun.vert</strong> i <strong>shader_5_sun.frag</strong> są identyczne z 5_1** przed zmianami, będą punktem wyjścia dla <em>shadera</em> słońca.</p>
+<ol type="1">
+<li><p>Utwórz zmienną globalną <code>GLuint programSun</code> na adres shadera słońca. Stwórz <em>program</em> za pomocą <code>shaderLoader.CreateProgram</code> analogicznie jak tworzy się <code>program</code> z <strong>shader_5_1.vert</strong> i <strong>shader_5_1.frag</strong> (parametry wejściowe to ścieżka do shadera wierzchołków i fragmentów <strong>shader_5_sun.vert</strong> i <strong>shader_5_sun.frag</strong>).</p></li>
+<li><p>W skomplikowanym projekcie różne typy obiektów rysuje się przy użyciu różnych shaderów, zate potrzebna jest w programie architektura, która na to pozwala. Ustaw odpowiedni <em>program</em> (shadery) do rysowania słońca:</p></li>
+</ol>
+<ul>
+<li>funkcja <code>drawObject</code> korzysta z globalnej zmiennej <code>program</code>, żeby wskazywać shadery do rysowania. Dodaj argument do funkcji, który będziesz przekazywać adres <em>programu</em>, który ma być wykorzystany do rysowania.</li>
+<li>dodaj odpowiedni <em>program</em> w wywołaniach <code>drawObject</code>.</li>
+</ul>
+
+
+<h2 id="zadanie---osłabienie-światła-attenuation"> Zadanie - Zmień shader słońca na bardziej realistyczny </h2>
+
+<p>Na poniższym obrazku jest zdjęcie słońca. Jest ono ciemniejsze na brzegach spróbuj uzyskać podobny efekt. Przydadzą się wektory normalnych i wektor <strong>V</strong> jak i funkcja mix.</p>
+<p><img src="./img/sun.png" /></p>
+
+<h2 id="osłabienie-światła-tone-mapping">Osłabienie światła, tone mapping</h2>
+<h3 id="zadanie---osłabienie-światła-attenuation">Zadanie - Osłabienie światła (attenuation)</h3>
+<p>Światło pochodzące z punktowego źródła traci na sile wraz z dystansem. Wynika to z tego, że rozprasza się na większą powierzchnię. Dodaj ten efekt do shadera. Zamiast brać kolor światła bezpośrednio, podziel go przez kwadrat dystansu od źródła świata. Przed kwadratowaniem przemnoz diystans przez 10.0.</p>
+
+<h4 id="tone-mapping">Tone mapping</h4>
+<p>Przez obecną zmianę scena stała się ciemna. Wymaga to od nas zmiany ‘koloru’ światła na wartości dużo większe niż do tej pory. Jeśli teraz to zrobimy i przesadzimy w drugą stronę, otrzymamy efekt prześwietlenia. Wynika to z ograniczenia zakresu kolorów do <span class="math inline">\([0,1]\)</span> (obsługą wyższych wartości nazywamy HDR). Rozwiązaniem jest pracowanie na wartościach powyżej 1 wykorzystanie <em>tone mappingu</em> do przeniesienia ich w zakres <span class="math inline">\([0,1]\)</span>. Istnieje wiele wzorów, które są wykorzystywane do tego, jeden z nich to:</p>
+<p><span class="math display">\[C_{mapped} = 1-e^{-C * E},\]</span> gdzie C to kolor sceny a E to parametr ekspozycji (z zakresu <span class="math inline">\((0,\infty)\)</span>, który może być dostosowany w zależności od jasności.
+
+<h3 id="zadanie">Zadanie - Tone mapping</h3>
+Zwiększ siłę słońca przynajmniej stukrotnie. Zaimplementuj powyższą metodę tone mappingu i dodaj możliwość sterowania ekspozycją za pomocą klawiszy 1 i 2.</p>
+<h3 id="zadanie">Zadanie*</h3>
+<p>Dodaj drugie źródło oświetlenia w postaci reflektora statku. Reflektor świeci tylko w określonym stożku,dlatego oprócz pozycji <code>spotPos</code> posiada również kierunek <code>spotDir</code> i kąt świecenia <span class="math inline">\(\phi\)</span>. Po obliczeniu dla niego <code>lightDir</code> należy sprawdzić, czy iloczyn skalarny pomiędzy <code>lightDir</code> a <code>spodDir</code> jest większy niż <span class="math inline">\(\cos\phi\)</span> . Jeżeli nie jest, to stożek nie świeci w tym miejscu. Można ułatwić sobie implementację wielu źródeł światła poprzez przeniesienie obliczeń oświetlenia do funkcji, która przyjmuje kierunek światła i siłę naświetlenie.</p>
+Zwróć uwagę, że SpotDir to co innego niż light Dir w poprzednich zadaniach.
+<p><img src="./img/spotlight.png" /> </p>
+</body>
+</html>
--- a/5/zlib.dll
+++ b/5/zlib.dll
--- a/5/zlibd.dll
+++ b/5/zlibd.dll
--- a/dependencies/assimp/IrrXMLd.lib
+++ b/dependencies/assimp/IrrXMLd.lib
--- a/dependencies/assimp/assimp-vc141-mtd.dll
+++ b/dependencies/assimp/assimp-vc141-mtd.dll
--- a/dependencies/assimp/assimp-vc141-mtd.exp
+++ b/dependencies/assimp/assimp-vc141-mtd.exp
--- a/dependencies/assimp/assimp-vc141-mtd.lib
+++ b/dependencies/assimp/assimp-vc141-mtd.lib
--- a/dependencies/assimp/assimp_viewerd.exe
+++ b/dependencies/assimp/assimp_viewerd.exe
--- a/dependencies/assimp/assimpd.exe
+++ b/dependencies/assimp/assimpd.exe
--- a/dependencies/assimp/include/assimp/.editorconfig
+++ b/dependencies/assimp/include/assimp/.editorconfig
@ -0,0 +1,8 @@
+# See <http://EditorConfig.org> for details
+
+[*.{h,hpp,inl}]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_size = 4
+indent_style = space
--- a/dependencies/assimp/include/assimp/BaseImporter.h
+++ b/dependencies/assimp/include/assimp/BaseImporter.h
@ -0,0 +1,418 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Definition of the base class for all importer worker classes. */
+#ifndef INCLUDED_AI_BASEIMPORTER_H
+#define INCLUDED_AI_BASEIMPORTER_H
+
+#include "Exceptional.h"
+
+#include <vector>
+#include <set>
+#include <map>
+#include <assimp/types.h>
+#include <assimp/ProgressHandler.hpp>
+#include <assimp/ai_assert.h>
+
+struct aiScene;
+struct aiImporterDesc;
+
+namespace Assimp    {
+
+class Importer;
+class IOSystem;
+class BaseProcess;
+class SharedPostProcessInfo;
+class IOStream;
+
+// utility to do char4 to uint32 in a portable manner
+#define AI_MAKE_MAGIC(string) ((uint32_t)((string[0] << 24) + \
+    (string[1] << 16) + (string[2] << 8) + string[3]))
+
+
+// ---------------------------------------------------------------------------
+/** FOR IMPORTER PLUGINS ONLY: The BaseImporter defines a common interface
+ *  for all importer worker classes.
+ *
+ * The interface defines two functions: CanRead() is used to check if the
+ * importer can handle the format of the given file. If an implementation of
+ * this function returns true, the importer then calls ReadFile() which
+ * imports the given file. ReadFile is not overridable, it just calls
+ * InternReadFile() and catches any ImportErrorException that might occur.
+ */
+class ASSIMP_API BaseImporter {
+    friend class Importer;
+
+private:
+    /* Pushes state into importer for the importer scale */
+    virtual void UpdateImporterScale( Importer* pImp );
+
+public:
+
+    /** Constructor to be privately used by #Importer */
+    BaseImporter() AI_NO_EXCEPT;
+
+    /** Destructor, private as well */
+    virtual ~BaseImporter();
+
+    // -------------------------------------------------------------------
+    /** Returns whether the class can handle the format of the given file.
+     *
+     * The implementation should be as quick as possible. A check for
+     * the file extension is enough. If no suitable loader is found with
+     * this strategy, CanRead() is called again, the 'checkSig' parameter
+     * set to true this time. Now the implementation is expected to
+     * perform a full check of the file structure, possibly searching the
+     * first bytes of the file for magic identifiers or keywords.
+     *
+     * @param pFile Path and file name of the file to be examined.
+     * @param pIOHandler The IO handler to use for accessing any file.
+     * @param checkSig Set to true if this method is called a second time.
+     *   This time, the implementation may take more time to examine the
+     *   contents of the file to be loaded for magic bytes, keywords, etc
+     *   to be able to load files with unknown/not existent file extensions.
+     * @return true if the class can read this file, false if not.
+     */
+    virtual bool CanRead(
+        const std::string& pFile,
+        IOSystem* pIOHandler,
+        bool checkSig
+        ) const = 0;
+
+    // -------------------------------------------------------------------
+    /** Imports the given file and returns the imported data.
+     * If the import succeeds, ownership of the data is transferred to
+     * the caller. If the import fails, NULL is returned. The function
+     * takes care that any partially constructed data is destroyed
+     * beforehand.
+     *
+     * @param pImp #Importer object hosting this loader.
+     * @param pFile Path of the file to be imported.
+     * @param pIOHandler IO-Handler used to open this and possible other files.
+     * @return The imported data or NULL if failed. If it failed a
+     * human-readable error description can be retrieved by calling
+     * GetErrorText()
+     *
+     * @note This function is not intended to be overridden. Implement
+     * InternReadFile() to do the import. If an exception is thrown somewhere
+     * in InternReadFile(), this function will catch it and transform it into
+     *  a suitable response to the caller.
+     */
+    aiScene* ReadFile(
+        Importer* pImp,
+        const std::string& pFile,
+        IOSystem* pIOHandler
+        );
+
+    // -------------------------------------------------------------------
+    /** Returns the error description of the last error that occurred.
+     * @return A description of the last error that occurred. An empty
+     * string if there was no error.
+     */
+    const std::string& GetErrorText() const {
+        return m_ErrorText;
+    }
+
+    // -------------------------------------------------------------------
+    /** Called prior to ReadFile().
+     * The function is a request to the importer to update its configuration
+     * basing on the Importer's configuration property list.
+     * @param pImp Importer instance
+     */
+    virtual void SetupProperties(
+        const Importer* pImp
+        );
+
+    // -------------------------------------------------------------------
+    /** Called by #Importer::GetImporterInfo to get a description of
+     *  some loader features. Importers must provide this information. */
+    virtual const aiImporterDesc* GetInfo() const = 0;
+
+    /**
+     * Will be called only by scale process when scaling is requested.
+     */
+    virtual void SetFileScale(double scale)
+    {
+        fileScale = scale;
+    }
+
+    virtual double GetFileScale() const
+    {
+        return fileScale;
+    }
+
+    enum ImporterUnits {
+        M,
+        MM,
+        CM,
+        INCHES,
+        FEET
+    };
+
+    /**
+     * Assimp Importer
+     * unit conversions available 
+     * if you need another measurment unit add it below.
+     * it's currently defined in assimp that we prefer meters.
+     * */
+    std::map<ImporterUnits, double> importerUnits = {
+        {ImporterUnits::M, 1},
+        {ImporterUnits::CM, 0.01},
+        {ImporterUnits::MM, 0.001},
+        {ImporterUnits::INCHES, 0.0254},
+        {ImporterUnits::FEET, 0.3048}
+    };
+
+    virtual void SetApplicationUnits( const ImporterUnits& unit )
+    {
+        importerScale = importerUnits[unit];
+        applicationUnits = unit;
+    }
+
+    virtual const ImporterUnits& GetApplicationUnits()
+    {
+        return applicationUnits;
+    }
+
+    // -------------------------------------------------------------------
+    /** Called by #Importer::GetExtensionList for each loaded importer.
+     *  Take the extension list contained in the structure returned by
+     *  #GetInfo and insert all file extensions into the given set.
+     *  @param extension set to collect file extensions in*/
+    void GetExtensionList(std::set<std::string>& extensions);
+    
+protected:    
+    ImporterUnits applicationUnits = ImporterUnits::M;
+    double importerScale = 1.0;
+    double fileScale = 1.0;
+
+
+
+    // -------------------------------------------------------------------
+    /** Imports the given file into the given scene structure. The
+     * function is expected to throw an ImportErrorException if there is
+     * an error. If it terminates normally, the data in aiScene is
+     * expected to be correct. Override this function to implement the
+     * actual importing.
+     * <br>
+     *  The output scene must meet the following requirements:<br>
+     * <ul>
+     * <li>At least a root node must be there, even if its only purpose
+     *     is to reference one mesh.</li>
+     * <li>aiMesh::mPrimitiveTypes may be 0. The types of primitives
+     *   in the mesh are determined automatically in this case.</li>
+     * <li>the vertex data is stored in a pseudo-indexed "verbose" format.
+     *   In fact this means that every vertex that is referenced by
+     *   a face is unique. Or the other way round: a vertex index may
+     *   not occur twice in a single aiMesh.</li>
+     * <li>aiAnimation::mDuration may be -1. Assimp determines the length
+     *   of the animation automatically in this case as the length of
+     *   the longest animation channel.</li>
+     * <li>aiMesh::mBitangents may be NULL if tangents and normals are
+     *   given. In this case bitangents are computed as the cross product
+     *   between normal and tangent.</li>
+     * <li>There needn't be a material. If none is there a default material
+     *   is generated. However, it is recommended practice for loaders
+     *   to generate a default material for yourself that matches the
+     *   default material setting for the file format better than Assimp's
+     *   generic default material. Note that default materials *should*
+     *   be named AI_DEFAULT_MATERIAL_NAME if they're just color-shaded
+     *   or AI_DEFAULT_TEXTURED_MATERIAL_NAME if they define a (dummy)
+     *   texture. </li>
+     * </ul>
+     * If the AI_SCENE_FLAGS_INCOMPLETE-Flag is <b>not</b> set:<ul>
+     * <li> at least one mesh must be there</li>
+     * <li> there may be no meshes with 0 vertices or faces</li>
+     * </ul>
+     * This won't be checked (except by the validation step): Assimp will
+     * crash if one of the conditions is not met!
+     *
+     * @param pFile Path of the file to be imported.
+     * @param pScene The scene object to hold the imported data.
+     * NULL is not a valid parameter.
+     * @param pIOHandler The IO handler to use for any file access.
+     * NULL is not a valid parameter. */
+    virtual void InternReadFile(
+        const std::string& pFile,
+        aiScene* pScene,
+        IOSystem* pIOHandler
+        ) = 0;
+
+public: // static utilities
+
+    // -------------------------------------------------------------------
+    /** A utility for CanRead().
+     *
+     *  The function searches the header of a file for a specific token
+     *  and returns true if this token is found. This works for text
+     *  files only. There is a rudimentary handling of UNICODE files.
+     *  The comparison is case independent.
+     *
+     *  @param pIOSystem IO System to work with
+     *  @param file File name of the file
+     *  @param tokens List of tokens to search for
+     *  @param numTokens Size of the token array
+     *  @param searchBytes Number of bytes to be searched for the tokens.
+     */
+    static bool SearchFileHeaderForToken(
+        IOSystem* pIOSystem,
+        const std::string&  file,
+        const char** tokens,
+        unsigned int numTokens,
+        unsigned int searchBytes = 200,
+        bool tokensSol = false,
+        bool noAlphaBeforeTokens = false);
+
+    // -------------------------------------------------------------------
+    /** @brief Check whether a file has a specific file extension
+     *  @param pFile Input file
+     *  @param ext0 Extension to check for. Lowercase characters only, no dot!
+     *  @param ext1 Optional second extension
+     *  @param ext2 Optional third extension
+     *  @note Case-insensitive
+     */
+    static bool SimpleExtensionCheck (
+        const std::string& pFile,
+        const char* ext0,
+        const char* ext1 = NULL,
+        const char* ext2 = NULL);
+
+    // -------------------------------------------------------------------
+    /** @brief Extract file extension from a string
+     *  @param pFile Input file
+     *  @return Extension without trailing dot, all lowercase
+     */
+    static std::string GetExtension (
+        const std::string& pFile);
+
+    // -------------------------------------------------------------------
+    /** @brief Check whether a file starts with one or more magic tokens
+     *  @param pFile Input file
+     *  @param pIOHandler IO system to be used
+     *  @param magic n magic tokens
+     *  @params num Size of magic
+     *  @param offset Offset from file start where tokens are located
+     *  @param Size of one token, in bytes. Maximally 16 bytes.
+     *  @return true if one of the given tokens was found
+     *
+     *  @note For convenience, the check is also performed for the
+     *  byte-swapped variant of all tokens (big endian). Only for
+     *  tokens of size 2,4.
+     */
+    static bool CheckMagicToken(
+        IOSystem* pIOHandler,
+        const std::string& pFile,
+        const void* magic,
+        unsigned int num,
+        unsigned int offset = 0,
+        unsigned int size   = 4);
+
+    // -------------------------------------------------------------------
+    /** An utility for all text file loaders. It converts a file to our
+     *   UTF8 character set. Errors are reported, but ignored.
+     *
+     *  @param data File buffer to be converted to UTF8 data. The buffer
+     *  is resized as appropriate. */
+    static void ConvertToUTF8(
+        std::vector<char>& data);
+
+    // -------------------------------------------------------------------
+    /** An utility for all text file loaders. It converts a file from our
+     *   UTF8 character set back to ISO-8859-1. Errors are reported, but ignored.
+     *
+     *  @param data File buffer to be converted from UTF8 to ISO-8859-1. The buffer
+     *  is resized as appropriate. */
+    static void ConvertUTF8toISO8859_1(
+        std::string& data);
+
+    // -------------------------------------------------------------------
+    /// @brief  Enum to define, if empty files are ok or not.
+    enum TextFileMode { 
+        ALLOW_EMPTY,
+        FORBID_EMPTY 
+    };
+
+    // -------------------------------------------------------------------
+    /** Utility for text file loaders which copies the contents of the
+     *  file into a memory buffer and converts it to our UTF8
+     *  representation.
+     *  @param stream Stream to read from.
+     *  @param data Output buffer to be resized and filled with the
+     *   converted text file data. The buffer is terminated with
+     *   a binary 0.
+     *  @param mode Whether it is OK to load empty text files. */
+    static void TextFileToBuffer(
+        IOStream* stream,
+        std::vector<char>& data,
+        TextFileMode mode = FORBID_EMPTY);
+
+    // -------------------------------------------------------------------
+    /** Utility function to move a std::vector into a aiScene array
+    *  @param vec The vector to be moved
+    *  @param out The output pointer to the allocated array.
+    *  @param numOut The output count of elements copied. */
+    template<typename T>
+    AI_FORCE_INLINE
+    static void CopyVector(
+        std::vector<T>& vec,
+        T*& out,
+        unsigned int& outLength)
+    {
+        outLength = unsigned(vec.size());
+        if (outLength) {
+            out = new T[outLength];
+            std::swap_ranges(vec.begin(), vec.end(), out);
+        }
+    }
+
+protected:
+    /// Error description in case there was one.
+    std::string m_ErrorText;
+    /// Currently set progress handler.
+    ProgressHandler* m_progress;
+};
+
+
+
+} // end of namespace Assimp
+
+#endif // AI_BASEIMPORTER_H_INC
--- a/dependencies/assimp/include/assimp/Bitmap.h
+++ b/dependencies/assimp/include/assimp/Bitmap.h
@ -0,0 +1,125 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Bitmap.h
+ *  @brief Defines bitmap format helper for textures
+ *
+ * Used for file formats which embed their textures into the model file.
+ */
+
+#ifndef AI_BITMAP_H_INC
+#define AI_BITMAP_H_INC
+
+#include "defs.h"
+#include <stdint.h>
+#include <cstddef>
+
+struct aiTexture;
+
+namespace Assimp {
+
+class IOStream;
+
+class ASSIMP_API Bitmap {
+protected:
+
+    struct Header {
+        uint16_t type;
+        uint32_t size;
+        uint16_t reserved1;
+        uint16_t reserved2;
+        uint32_t offset;
+
+        // We define the struct size because sizeof(Header) might return a wrong result because of structure padding.
+        // Moreover, we must use this ugly and error prone syntax because Visual Studio neither support constexpr or sizeof(name_of_field).
+        static const std::size_t header_size =
+            sizeof(uint16_t) + // type
+            sizeof(uint32_t) + // size
+            sizeof(uint16_t) + // reserved1
+            sizeof(uint16_t) + // reserved2
+            sizeof(uint32_t);  // offset
+    };
+
+    struct DIB {
+        uint32_t size;
+        int32_t width;
+        int32_t height;
+        uint16_t planes;
+        uint16_t bits_per_pixel;
+        uint32_t compression;
+        uint32_t image_size;
+        int32_t x_resolution;
+        int32_t y_resolution;
+        uint32_t nb_colors;
+        uint32_t nb_important_colors;
+
+        // We define the struct size because sizeof(DIB) might return a wrong result because of structure padding.
+        // Moreover, we must use this ugly and error prone syntax because Visual Studio neither support constexpr or sizeof(name_of_field).
+        static const std::size_t dib_size =
+            sizeof(uint32_t) + // size
+            sizeof(int32_t) +  // width
+            sizeof(int32_t) +  // height
+            sizeof(uint16_t) + // planes
+            sizeof(uint16_t) + // bits_per_pixel
+            sizeof(uint32_t) + // compression
+            sizeof(uint32_t) + // image_size
+            sizeof(int32_t) +  // x_resolution
+            sizeof(int32_t) +  // y_resolution
+            sizeof(uint32_t) + // nb_colors
+            sizeof(uint32_t);  // nb_important_colors
+    };
+
+    static const std::size_t mBytesPerPixel = 4;
+
+public:
+    static void Save(aiTexture* texture, IOStream* file);
+
+protected:
+    static void WriteHeader(Header& header, IOStream* file);
+    static void WriteDIB(DIB& dib, IOStream* file);
+    static void WriteData(aiTexture* texture, IOStream* file);
+};
+
+}
+
+#endif // AI_BITMAP_H_INC
--- a/dependencies/assimp/include/assimp/BlobIOSystem.h
+++ b/dependencies/assimp/include/assimp/BlobIOSystem.h
@ -0,0 +1,338 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file Provides cheat implementations for IOSystem and IOStream to
+ *  redirect exporter output to a blob chain.*/
+
+#ifndef AI_BLOBIOSYSTEM_H_INCLUDED
+#define AI_BLOBIOSYSTEM_H_INCLUDED
+
+#include <assimp/IOStream.hpp>
+#include <assimp/cexport.h>
+#include <assimp/IOSystem.hpp>
+#include <assimp/DefaultLogger.hpp>
+#include <stdint.h>
+#include <set>
+#include <vector>
+
+namespace Assimp    {
+    class BlobIOSystem;
+
+// --------------------------------------------------------------------------------------------
+/** Redirect IOStream to a blob */
+// --------------------------------------------------------------------------------------------
+class BlobIOStream : public IOStream
+{
+public:
+
+    BlobIOStream(BlobIOSystem* creator, const std::string& file, size_t initial = 4096)
+        : buffer()
+        , cur_size()
+        , file_size()
+        , cursor()
+        , initial(initial)
+        , file(file)
+        , creator(creator)
+    {
+    }
+
+
+    virtual ~BlobIOStream();
+
+public:
+
+    // -------------------------------------------------------------------
+    aiExportDataBlob* GetBlob()
+    {
+        aiExportDataBlob* blob = new aiExportDataBlob();
+        blob->size = file_size;
+        blob->data = buffer;
+
+        buffer = NULL;
+
+        return blob;
+    }
+
+
+public:
+
+
+    // -------------------------------------------------------------------
+    virtual size_t Read( void *,
+        size_t,
+        size_t )
+    {
+        return 0;
+    }
+
+    // -------------------------------------------------------------------
+    virtual size_t Write(const void* pvBuffer,
+        size_t pSize,
+        size_t pCount)
+    {
+        pSize *= pCount;
+        if (cursor + pSize > cur_size) {
+            Grow(cursor + pSize);
+        }
+
+        memcpy(buffer+cursor, pvBuffer, pSize);
+        cursor += pSize;
+
+        file_size = std::max(file_size,cursor);
+        return pCount;
+    }
+
+    // -------------------------------------------------------------------
+    virtual aiReturn Seek(size_t pOffset,
+        aiOrigin pOrigin)
+    {
+        switch(pOrigin)
+        {
+        case aiOrigin_CUR:
+            cursor += pOffset;
+            break;
+
+        case aiOrigin_END:
+            cursor = file_size - pOffset;
+            break;
+
+        case aiOrigin_SET:
+            cursor = pOffset;
+            break;
+
+        default:
+            return AI_FAILURE;
+        }
+
+        if (cursor > file_size) {
+            Grow(cursor);
+        }
+
+        file_size = std::max(cursor,file_size);
+        return AI_SUCCESS;
+    }
+
+    // -------------------------------------------------------------------
+    virtual size_t Tell() const
+    {
+        return cursor;
+    }
+
+    // -------------------------------------------------------------------
+    virtual size_t FileSize() const
+    {
+        return file_size;
+    }
+
+    // -------------------------------------------------------------------
+    virtual void Flush()
+    {
+        // ignore
+    }
+
+
+
+private:
+
+    // -------------------------------------------------------------------
+    void Grow(size_t need = 0)
+    {
+        // 1.5 and phi are very heap-friendly growth factors (the first
+        // allows for frequent re-use of heap blocks, the second
+        // forms a fibonacci sequence with similar characteristics -
+        // since this heavily depends on the heap implementation
+        // and other factors as well, i'll just go with 1.5 since
+        // it is quicker to compute).
+        size_t new_size = std::max(initial, std::max( need, cur_size+(cur_size>>1) ));
+
+        const uint8_t* const old = buffer;
+        buffer = new uint8_t[new_size];
+
+        if (old) {
+            memcpy(buffer,old,cur_size);
+            delete[] old;
+        }
+
+        cur_size = new_size;
+    }
+
+private:
+
+    uint8_t* buffer;
+    size_t cur_size,file_size, cursor, initial;
+
+    const std::string file;
+    BlobIOSystem* const creator;
+};
+
+
+#define AI_BLOBIO_MAGIC "$blobfile"
+
+// --------------------------------------------------------------------------------------------
+/** Redirect IOSystem to a blob */
+// --------------------------------------------------------------------------------------------
+class BlobIOSystem : public IOSystem
+{
+
+    friend class BlobIOStream;
+    typedef std::pair<std::string, aiExportDataBlob*> BlobEntry;
+
+public:
+
+    BlobIOSystem()
+    {
+    }
+
+    virtual ~BlobIOSystem()
+    {
+        for(BlobEntry& blobby : blobs) {
+            delete blobby.second;
+        }
+    }
+
+public:
+
+    // -------------------------------------------------------------------
+    const char* GetMagicFileName() const
+    {
+        return AI_BLOBIO_MAGIC;
+    }
+
+
+    // -------------------------------------------------------------------
+    aiExportDataBlob* GetBlobChain()
+    {
+        // one must be the master
+        aiExportDataBlob* master = NULL, *cur;
+        for(const BlobEntry& blobby : blobs) {
+            if (blobby.first == AI_BLOBIO_MAGIC) {
+                master = blobby.second;
+                break;
+            }
+        }
+        if (!master) {
+            ASSIMP_LOG_ERROR("BlobIOSystem: no data written or master file was not closed properly.");
+            return NULL;
+        }
+
+        master->name.Set("");
+
+        cur = master;
+        for(const BlobEntry& blobby : blobs) {
+            if (blobby.second == master) {
+                continue;
+            }
+
+            cur->next = blobby.second;
+            cur = cur->next;
+
+            // extract the file extension from the file written
+            const std::string::size_type s = blobby.first.find_first_of('.');
+            cur->name.Set(s == std::string::npos ? blobby.first : blobby.first.substr(s+1));
+        }
+
+        // give up blob ownership
+        blobs.clear();
+        return master;
+    }
+
+public:
+
+    // -------------------------------------------------------------------
+    virtual bool Exists( const char* pFile) const {
+        return created.find(std::string(pFile)) != created.end();
+    }
+
+
+    // -------------------------------------------------------------------
+    virtual char getOsSeparator() const {
+        return '/';
+    }
+
+
+    // -------------------------------------------------------------------
+    virtual IOStream* Open(const char* pFile,
+        const char* pMode)
+    {
+        if (pMode[0] != 'w') {
+            return NULL;
+        }
+
+        created.insert(std::string(pFile));
+        return new BlobIOStream(this,std::string(pFile));
+    }
+
+    // -------------------------------------------------------------------
+    virtual void Close( IOStream* pFile)
+    {
+        delete pFile;
+    }
+
+private:
+
+    // -------------------------------------------------------------------
+    void OnDestruct(const std::string& filename, BlobIOStream* child)
+    {
+        // we don't know in which the files are closed, so we
+        // can't reliably say that the first must be the master
+        // file ...
+        blobs.push_back( BlobEntry(filename,child->GetBlob()) );
+    }
+
+private:
+    std::set<std::string> created;
+    std::vector< BlobEntry > blobs;
+};
+
+
+// --------------------------------------------------------------------------------------------
+BlobIOStream :: ~BlobIOStream()
+{
+    creator->OnDestruct(file,this);
+    delete[] buffer;
+}
+
+
+} // end Assimp
+
+#endif
--- a/dependencies/assimp/include/assimp/ByteSwapper.h
+++ b/dependencies/assimp/include/assimp/ByteSwapper.h
@ -0,0 +1,287 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Helper class tp perform various byte oder swappings
+   (e.g. little to big endian) */
+#ifndef AI_BYTESWAPPER_H_INC
+#define AI_BYTESWAPPER_H_INC
+
+#include <assimp/ai_assert.h>
+#include <assimp/types.h>
+#include <stdint.h>
+
+#if _MSC_VER >= 1400
+#include <stdlib.h>
+#endif
+
+namespace Assimp    {
+// --------------------------------------------------------------------------------------
+/** Defines some useful byte order swap routines.
+ *
+ * This is required to read big-endian model formats on little-endian machines,
+ * and vice versa. Direct use of this class is DEPRECATED. Use #StreamReader instead. */
+// --------------------------------------------------------------------------------------
+class ByteSwap {
+    ByteSwap() AI_NO_EXCEPT {}
+
+public:
+
+    // ----------------------------------------------------------------------
+    /** Swap two bytes of data
+     *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
+    static inline void Swap2(void* _szOut)
+    {
+        ai_assert(_szOut);
+
+#if _MSC_VER >= 1400
+        uint16_t* const szOut = reinterpret_cast<uint16_t*>(_szOut);
+        *szOut = _byteswap_ushort(*szOut);
+#else
+        uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
+        std::swap(szOut[0],szOut[1]);
+#endif
+    }
+
+    // ----------------------------------------------------------------------
+    /** Swap four bytes of data
+     *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
+    static inline void Swap4(void* _szOut)
+    {
+        ai_assert(_szOut);
+
+#if _MSC_VER >= 1400
+        uint32_t* const szOut = reinterpret_cast<uint32_t*>(_szOut);
+        *szOut = _byteswap_ulong(*szOut);
+#else
+        uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
+        std::swap(szOut[0],szOut[3]);
+        std::swap(szOut[1],szOut[2]);
+#endif
+    }
+
+    // ----------------------------------------------------------------------
+    /** Swap eight bytes of data
+     *  @param[inout] _szOut A void* to save the reintcasts for the caller. */
+    static inline void Swap8(void* _szOut)
+    {
+    ai_assert(_szOut);
+
+#if _MSC_VER >= 1400
+        uint64_t* const szOut = reinterpret_cast<uint64_t*>(_szOut);
+        *szOut = _byteswap_uint64(*szOut);
+#else
+        uint8_t* const szOut = reinterpret_cast<uint8_t*>(_szOut);
+        std::swap(szOut[0],szOut[7]);
+        std::swap(szOut[1],szOut[6]);
+        std::swap(szOut[2],szOut[5]);
+        std::swap(szOut[3],szOut[4]);
+#endif
+    }
+
+    // ----------------------------------------------------------------------
+    /** ByteSwap a float. Not a joke.
+     *  @param[inout] fOut ehm. .. */
+    static inline void Swap(float* fOut) {
+        Swap4(fOut);
+    }
+
+    // ----------------------------------------------------------------------
+    /** ByteSwap a double. Not a joke.
+     *  @param[inout] fOut ehm. .. */
+    static inline void Swap(double* fOut) {
+        Swap8(fOut);
+    }
+
+
+    // ----------------------------------------------------------------------
+    /** ByteSwap an int16t. Not a joke.
+     *  @param[inout] fOut ehm. .. */
+    static inline void Swap(int16_t* fOut) {
+        Swap2(fOut);
+    }
+
+    static inline void Swap(uint16_t* fOut) {
+        Swap2(fOut);
+    }
+
+    // ----------------------------------------------------------------------
+    /** ByteSwap an int32t. Not a joke.
+     *  @param[inout] fOut ehm. .. */
+    static inline void Swap(int32_t* fOut){
+        Swap4(fOut);
+    }
+
+    static inline void Swap(uint32_t* fOut){
+        Swap4(fOut);
+    }
+
+    // ----------------------------------------------------------------------
+    /** ByteSwap an int64t. Not a joke.
+     *  @param[inout] fOut ehm. .. */
+    static inline void Swap(int64_t* fOut) {
+        Swap8(fOut);
+    }
+
+    static inline void Swap(uint64_t* fOut) {
+        Swap8(fOut);
+    }
+
+    // ----------------------------------------------------------------------
+    //! Templatized ByteSwap
+    //! \returns param tOut as swapped
+    template<typename Type>
+    static inline Type Swapped(Type tOut)
+    {
+        return _swapper<Type,sizeof(Type)>()(tOut);
+    }
+
+private:
+
+    template <typename T, size_t size> struct _swapper;
+};
+
+template <typename T> struct ByteSwap::_swapper<T,2> {
+    T operator() (T tOut) {
+        Swap2(&tOut);
+        return tOut;
+    }
+};
+
+template <typename T> struct ByteSwap::_swapper<T,4> {
+    T operator() (T tOut) {
+        Swap4(&tOut);
+        return tOut;
+    }
+};
+
+template <typename T> struct ByteSwap::_swapper<T,8> {
+    T operator() (T tOut) {
+        Swap8(&tOut);
+        return tOut;
+    }
+};
+
+
+// --------------------------------------------------------------------------------------
+// ByteSwap macros for BigEndian/LittleEndian support
+// --------------------------------------------------------------------------------------
+#if (defined AI_BUILD_BIG_ENDIAN)
+#   define AI_LE(t) (t)
+#   define AI_BE(t) ByteSwap::Swapped(t)
+#   define AI_LSWAP2(p)
+#   define AI_LSWAP4(p)
+#   define AI_LSWAP8(p)
+#   define AI_LSWAP2P(p)
+#   define AI_LSWAP4P(p)
+#   define AI_LSWAP8P(p)
+#   define LE_NCONST const
+#   define AI_SWAP2(p) ByteSwap::Swap2(&(p))
+#   define AI_SWAP4(p) ByteSwap::Swap4(&(p))
+#   define AI_SWAP8(p) ByteSwap::Swap8(&(p))
+#   define AI_SWAP2P(p) ByteSwap::Swap2((p))
+#   define AI_SWAP4P(p) ByteSwap::Swap4((p))
+#   define AI_SWAP8P(p) ByteSwap::Swap8((p))
+#   define BE_NCONST
+#else
+#   define AI_BE(t) (t)
+#   define AI_LE(t) ByteSwap::Swapped(t)
+#   define AI_SWAP2(p)
+#   define AI_SWAP4(p)
+#   define AI_SWAP8(p)
+#   define AI_SWAP2P(p)
+#   define AI_SWAP4P(p)
+#   define AI_SWAP8P(p)
+#   define BE_NCONST const
+#   define AI_LSWAP2(p)     ByteSwap::Swap2(&(p))
+#   define AI_LSWAP4(p)     ByteSwap::Swap4(&(p))
+#   define AI_LSWAP8(p)     ByteSwap::Swap8(&(p))
+#   define AI_LSWAP2P(p)    ByteSwap::Swap2((p))
+#   define AI_LSWAP4P(p)    ByteSwap::Swap4((p))
+#   define AI_LSWAP8P(p)    ByteSwap::Swap8((p))
+#   define LE_NCONST
+#endif
+
+
+namespace Intern {
+
+// --------------------------------------------------------------------------------------------
+template <typename T, bool doit>
+struct ByteSwapper  {
+    void operator() (T* inout) {
+        ByteSwap::Swap(inout);
+    }
+};
+
+template <typename T>
+struct ByteSwapper<T,false> {
+    void operator() (T*) {
+    }
+};
+
+// --------------------------------------------------------------------------------------------
+template <bool SwapEndianess, typename T, bool RuntimeSwitch>
+struct Getter {
+    void operator() (T* inout, bool le) {
+#ifdef AI_BUILD_BIG_ENDIAN
+        le =  le;
+#else
+        le =  !le;
+#endif
+        if (le) {
+            ByteSwapper<T,(sizeof(T)>1?true:false)> () (inout);
+        }
+        else ByteSwapper<T,false> () (inout);
+    }
+};
+
+template <bool SwapEndianess, typename T>
+struct Getter<SwapEndianess,T,false> {
+
+    void operator() (T* inout, bool /*le*/) {
+        // static branch
+        ByteSwapper<T,(SwapEndianess && sizeof(T)>1)> () (inout);
+    }
+};
+} // end Intern
+} // end Assimp
+
+#endif //!! AI_BYTESWAPPER_H_INC
--- a/dependencies/assimp/include/assimp/Compiler/poppack1.h
+++ b/dependencies/assimp/include/assimp/Compiler/poppack1.h
@ -0,0 +1,22 @@
+
+// ===============================================================================
+// May be included multiple times - resets structure packing to the defaults 
+// for all supported compilers. Reverts the changes made by #include <pushpack1.h> 
+//
+// Currently this works on the following compilers:
+// MSVC 7,8,9
+// GCC
+// BORLAND (complains about 'pack state changed but not reverted', but works)
+// ===============================================================================
+
+#ifndef AI_PUSHPACK_IS_DEFINED
+#	error pushpack1.h must be included after poppack1.h
+#endif
+
+// reset packing to the original value
+#if defined(_MSC_VER) ||  defined(__BORLANDC__) || defined (__BCPLUSPLUS__)
+#	pragma pack( pop )
+#endif
+#undef PACK_STRUCT
+
+#undef AI_PUSHPACK_IS_DEFINED
--- a/dependencies/assimp/include/assimp/Compiler/pstdint.h
+++ b/dependencies/assimp/include/assimp/Compiler/pstdint.h
@ -0,0 +1,912 @@
+/*  A portable stdint.h
+ ****************************************************************************
+ *  BSD License:
+ ****************************************************************************
+ *
+ *  Copyright (c) 2005-2016 Paul Hsieh
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************
+ *
+ *  Version 0.1.15.4
+ *
+ *  The ANSI C standard committee, for the C99 standard, specified the
+ *  inclusion of a new standard include file called stdint.h.  This is
+ *  a very useful and long desired include file which contains several
+ *  very precise definitions for integer scalar types that is
+ *  critically important for making portable several classes of
+ *  applications including cryptography, hashing, variable length
+ *  integer libraries and so on.  But for most developers its likely
+ *  useful just for programming sanity.
+ *
+ *  The problem is that some compiler vendors chose to ignore the C99
+ *  standard and some older compilers have no opportunity to be updated.
+ *  Because of this situation, simply including stdint.h in your code
+ *  makes it unportable.
+ *
+ *  So that's what this file is all about.  Its an attempt to build a
+ *  single universal include file that works on as many platforms as
+ *  possible to deliver what stdint.h is supposed to.  Even compilers
+ *  that already come with stdint.h can use this file instead without
+ *  any loss of functionality.  A few things that should be noted about
+ *  this file:
+ *
+ *    1) It is not guaranteed to be portable and/or present an identical
+ *       interface on all platforms.  The extreme variability of the
+ *       ANSI C standard makes this an impossibility right from the
+ *       very get go. Its really only meant to be useful for the vast
+ *       majority of platforms that possess the capability of
+ *       implementing usefully and precisely defined, standard sized
+ *       integer scalars.  Systems which are not intrinsically 2s
+ *       complement may produce invalid constants.
+ *
+ *    2) There is an unavoidable use of non-reserved symbols.
+ *
+ *    3) Other standard include files are invoked.
+ *
+ *    4) This file may come in conflict with future platforms that do
+ *       include stdint.h.  The hope is that one or the other can be
+ *       used with no real difference.
+ *
+ *    5) In the current version, if your platform can't represent
+ *       int32_t, int16_t and int8_t, it just dumps out with a compiler
+ *       error.
+ *
+ *    6) 64 bit integers may or may not be defined.  Test for their
+ *       presence with the test: #ifdef INT64_MAX or #ifdef UINT64_MAX.
+ *       Note that this is different from the C99 specification which
+ *       requires the existence of 64 bit support in the compiler.  If
+ *       this is not defined for your platform, yet it is capable of
+ *       dealing with 64 bits then it is because this file has not yet
+ *       been extended to cover all of your system's capabilities.
+ *
+ *    7) (u)intptr_t may or may not be defined.  Test for its presence
+ *       with the test: #ifdef PTRDIFF_MAX.  If this is not defined
+ *       for your platform, then it is because this file has not yet
+ *       been extended to cover all of your system's capabilities, not
+ *       because its optional.
+ *
+ *    8) The following might not been defined even if your platform is
+ *       capable of defining it:
+ *
+ *       WCHAR_MIN
+ *       WCHAR_MAX
+ *       (u)int64_t
+ *       PTRDIFF_MIN
+ *       PTRDIFF_MAX
+ *       (u)intptr_t
+ *
+ *    9) The following have not been defined:
+ *
+ *       WINT_MIN
+ *       WINT_MAX
+ *
+ *   10) The criteria for defining (u)int_least(*)_t isn't clear,
+ *       except for systems which don't have a type that precisely
+ *       defined 8, 16, or 32 bit types (which this include file does
+ *       not support anyways). Default definitions have been given.
+ *
+ *   11) The criteria for defining (u)int_fast(*)_t isn't something I
+ *       would trust to any particular compiler vendor or the ANSI C
+ *       committee.  It is well known that "compatible systems" are
+ *       commonly created that have very different performance
+ *       characteristics from the systems they are compatible with,
+ *       especially those whose vendors make both the compiler and the
+ *       system.  Default definitions have been given, but its strongly
+ *       recommended that users never use these definitions for any
+ *       reason (they do *NOT* deliver any serious guarantee of
+ *       improved performance -- not in this file, nor any vendor's
+ *       stdint.h).
+ *
+ *   12) The following macros:
+ *
+ *       PRINTF_INTMAX_MODIFIER
+ *       PRINTF_INT64_MODIFIER
+ *       PRINTF_INT32_MODIFIER
+ *       PRINTF_INT16_MODIFIER
+ *       PRINTF_LEAST64_MODIFIER
+ *       PRINTF_LEAST32_MODIFIER
+ *       PRINTF_LEAST16_MODIFIER
+ *       PRINTF_INTPTR_MODIFIER
+ *
+ *       are strings which have been defined as the modifiers required
+ *       for the "d", "u" and "x" printf formats to correctly output
+ *       (u)intmax_t, (u)int64_t, (u)int32_t, (u)int16_t, (u)least64_t,
+ *       (u)least32_t, (u)least16_t and (u)intptr_t types respectively.
+ *       PRINTF_INTPTR_MODIFIER is not defined for some systems which
+ *       provide their own stdint.h.  PRINTF_INT64_MODIFIER is not
+ *       defined if INT64_MAX is not defined.  These are an extension
+ *       beyond what C99 specifies must be in stdint.h.
+ *
+ *       In addition, the following macros are defined:
+ *
+ *       PRINTF_INTMAX_HEX_WIDTH
+ *       PRINTF_INT64_HEX_WIDTH
+ *       PRINTF_INT32_HEX_WIDTH
+ *       PRINTF_INT16_HEX_WIDTH
+ *       PRINTF_INT8_HEX_WIDTH
+ *       PRINTF_INTMAX_DEC_WIDTH
+ *       PRINTF_INT64_DEC_WIDTH
+ *       PRINTF_INT32_DEC_WIDTH
+ *       PRINTF_INT16_DEC_WIDTH
+ *       PRINTF_UINT8_DEC_WIDTH
+ *       PRINTF_UINTMAX_DEC_WIDTH
+ *       PRINTF_UINT64_DEC_WIDTH
+ *       PRINTF_UINT32_DEC_WIDTH
+ *       PRINTF_UINT16_DEC_WIDTH
+ *       PRINTF_UINT8_DEC_WIDTH
+ *
+ *       Which specifies the maximum number of characters required to
+ *       print the number of that type in either hexadecimal or decimal.
+ *       These are an extension beyond what C99 specifies must be in
+ *       stdint.h.
+ *
+ *  Compilers tested (all with 0 warnings at their highest respective
+ *  settings): Borland Turbo C 2.0, WATCOM C/C++ 11.0 (16 bits and 32
+ *  bits), Microsoft Visual C++ 6.0 (32 bit), Microsoft Visual Studio
+ *  .net (VC7), Intel C++ 4.0, GNU gcc v3.3.3
+ *
+ *  This file should be considered a work in progress.  Suggestions for
+ *  improvements, especially those which increase coverage are strongly
+ *  encouraged.
+ *
+ *  Acknowledgements
+ *
+ *  The following people have made significant contributions to the
+ *  development and testing of this file:
+ *
+ *  Chris Howie
+ *  John Steele Scott
+ *  Dave Thorup
+ *  John Dill
+ *  Florian Wobbe
+ *  Christopher Sean Morrison
+ *  Mikkel Fahnoe Jorgensen
+ *
+ */
+
+#include <stddef.h>
+#include <limits.h>
+#include <signal.h>
+
+/*
+ *  For gcc with _STDINT_H, fill in the PRINTF_INT*_MODIFIER macros, and
+ *  do nothing else.  On the Mac OS X version of gcc this is _STDINT_H_.
+ */
+
+#if ((defined(__SUNPRO_C) && __SUNPRO_C >= 0x570) || (defined(_MSC_VER) && _MSC_VER >= 1600) || (defined(__STDC__) && __STDC__ && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || (defined (__WATCOMC__) && (defined (_STDINT_H_INCLUDED) || __WATCOMC__ >= 1250)) || (defined(__GNUC__) && (__GNUC__ > 3 || defined(_STDINT_H) || defined(_STDINT_H_) || defined (__UINT_FAST64_TYPE__)) )) && !defined (_PSTDINT_H_INCLUDED)
+#include <stdint.h>
+#define _PSTDINT_H_INCLUDED
+# if defined(__GNUC__) && (defined(__x86_64__) || defined(__ppc64__)) && !(defined(__APPLE__) && defined(__MACH__))
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "l"
+#  endif
+#  ifndef PRINTF_INT32_MODIFIER
+#   define PRINTF_INT32_MODIFIER ""
+#  endif
+# else
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "ll"
+#  endif
+#  ifndef PRINTF_INT32_MODIFIER
+#   if (UINT_MAX == UINT32_MAX)
+#    define PRINTF_INT32_MODIFIER ""
+#   else
+#    define PRINTF_INT32_MODIFIER "l"
+#   endif
+#  endif
+# endif
+# ifndef PRINTF_INT16_MODIFIER
+#  define PRINTF_INT16_MODIFIER "h"
+# endif
+# ifndef PRINTF_INTMAX_MODIFIER
+#  define PRINTF_INTMAX_MODIFIER PRINTF_INT64_MODIFIER
+# endif
+# ifndef PRINTF_INT64_HEX_WIDTH
+#  define PRINTF_INT64_HEX_WIDTH "16"
+# endif
+# ifndef PRINTF_UINT64_HEX_WIDTH
+#  define PRINTF_UINT64_HEX_WIDTH "16"
+# endif
+# ifndef PRINTF_INT32_HEX_WIDTH
+#  define PRINTF_INT32_HEX_WIDTH "8"
+# endif
+# ifndef PRINTF_UINT32_HEX_WIDTH
+#  define PRINTF_UINT32_HEX_WIDTH "8"
+# endif
+# ifndef PRINTF_INT16_HEX_WIDTH
+#  define PRINTF_INT16_HEX_WIDTH "4"
+# endif
+# ifndef PRINTF_UINT16_HEX_WIDTH
+#  define PRINTF_UINT16_HEX_WIDTH "4"
+# endif
+# ifndef PRINTF_INT8_HEX_WIDTH
+#  define PRINTF_INT8_HEX_WIDTH "2"
+# endif
+# ifndef PRINTF_UINT8_HEX_WIDTH
+#  define PRINTF_UINT8_HEX_WIDTH "2"
+# endif
+# ifndef PRINTF_INT64_DEC_WIDTH
+#  define PRINTF_INT64_DEC_WIDTH "19"
+# endif
+# ifndef PRINTF_UINT64_DEC_WIDTH
+#  define PRINTF_UINT64_DEC_WIDTH "20"
+# endif
+# ifndef PRINTF_INT32_DEC_WIDTH
+#  define PRINTF_INT32_DEC_WIDTH "10"
+# endif
+# ifndef PRINTF_UINT32_DEC_WIDTH
+#  define PRINTF_UINT32_DEC_WIDTH "10"
+# endif
+# ifndef PRINTF_INT16_DEC_WIDTH
+#  define PRINTF_INT16_DEC_WIDTH "5"
+# endif
+# ifndef PRINTF_UINT16_DEC_WIDTH
+#  define PRINTF_UINT16_DEC_WIDTH "5"
+# endif
+# ifndef PRINTF_INT8_DEC_WIDTH
+#  define PRINTF_INT8_DEC_WIDTH "3"
+# endif
+# ifndef PRINTF_UINT8_DEC_WIDTH
+#  define PRINTF_UINT8_DEC_WIDTH "3"
+# endif
+# ifndef PRINTF_INTMAX_HEX_WIDTH
+#  define PRINTF_INTMAX_HEX_WIDTH PRINTF_UINT64_HEX_WIDTH
+# endif
+# ifndef PRINTF_UINTMAX_HEX_WIDTH
+#  define PRINTF_UINTMAX_HEX_WIDTH PRINTF_UINT64_HEX_WIDTH
+# endif
+# ifndef PRINTF_INTMAX_DEC_WIDTH
+#  define PRINTF_INTMAX_DEC_WIDTH PRINTF_UINT64_DEC_WIDTH
+# endif
+# ifndef PRINTF_UINTMAX_DEC_WIDTH
+#  define PRINTF_UINTMAX_DEC_WIDTH PRINTF_UINT64_DEC_WIDTH
+# endif
+
+/*
+ *  Something really weird is going on with Open Watcom.  Just pull some of
+ *  these duplicated definitions from Open Watcom's stdint.h file for now.
+ */
+
+# if defined (__WATCOMC__) && __WATCOMC__ >= 1250
+#  if !defined (INT64_C)
+#   define INT64_C(x)   (x + (INT64_MAX - INT64_MAX))
+#  endif
+#  if !defined (UINT64_C)
+#   define UINT64_C(x)  (x + (UINT64_MAX - UINT64_MAX))
+#  endif
+#  if !defined (INT32_C)
+#   define INT32_C(x)   (x + (INT32_MAX - INT32_MAX))
+#  endif
+#  if !defined (UINT32_C)
+#   define UINT32_C(x)  (x + (UINT32_MAX - UINT32_MAX))
+#  endif
+#  if !defined (INT16_C)
+#   define INT16_C(x)   (x)
+#  endif
+#  if !defined (UINT16_C)
+#   define UINT16_C(x)  (x)
+#  endif
+#  if !defined (INT8_C)
+#   define INT8_C(x)   (x)
+#  endif
+#  if !defined (UINT8_C)
+#   define UINT8_C(x)  (x)
+#  endif
+#  if !defined (UINT64_MAX)
+#   define UINT64_MAX  18446744073709551615ULL
+#  endif
+#  if !defined (INT64_MAX)
+#   define INT64_MAX  9223372036854775807LL
+#  endif
+#  if !defined (UINT32_MAX)
+#   define UINT32_MAX  4294967295UL
+#  endif
+#  if !defined (INT32_MAX)
+#   define INT32_MAX  2147483647L
+#  endif
+#  if !defined (INTMAX_MAX)
+#   define INTMAX_MAX INT64_MAX
+#  endif
+#  if !defined (INTMAX_MIN)
+#   define INTMAX_MIN INT64_MIN
+#  endif
+# endif
+#endif
+
+/*
+ *  I have no idea what is the truly correct thing to do on older Solaris.
+ *  From some online discussions, this seems to be what is being
+ *  recommended.  For people who actually are developing on older Solaris,
+ *  what I would like to know is, does this define all of the relevant
+ *  macros of a complete stdint.h?  Remember, in pstdint.h 64 bit is
+ *  considered optional.
+ */
+
+#if (defined(__SUNPRO_C) && __SUNPRO_C >= 0x420) && !defined(_PSTDINT_H_INCLUDED)
+#include <sys/inttypes.h>
+#define _PSTDINT_H_INCLUDED
+#endif
+
+#ifndef _PSTDINT_H_INCLUDED
+#define _PSTDINT_H_INCLUDED
+
+#ifndef SIZE_MAX
+# define SIZE_MAX (~(size_t)0)
+#endif
+
+/*
+ *  Deduce the type assignments from limits.h under the assumption that
+ *  integer sizes in bits are powers of 2, and follow the ANSI
+ *  definitions.
+ */
+
+#ifndef UINT8_MAX
+# define UINT8_MAX 0xff
+#endif
+#if !defined(uint8_t) && !defined(_UINT8_T) && !defined(vxWorks)
+# if (UCHAR_MAX == UINT8_MAX) || defined (S_SPLINT_S)
+    typedef unsigned char uint8_t;
+#   define UINT8_C(v) ((uint8_t) v)
+# else
+#   error "Platform not supported"
+# endif
+#endif
+
+#ifndef INT8_MAX
+# define INT8_MAX 0x7f
+#endif
+#ifndef INT8_MIN
+# define INT8_MIN INT8_C(0x80)
+#endif
+#if !defined(int8_t) && !defined(_INT8_T) && !defined(vxWorks)
+# if (SCHAR_MAX == INT8_MAX) || defined (S_SPLINT_S)
+    typedef signed char int8_t;
+#   define INT8_C(v) ((int8_t) v)
+# else
+#   error "Platform not supported"
+# endif
+#endif
+
+#ifndef UINT16_MAX
+# define UINT16_MAX 0xffff
+#endif
+#if !defined(uint16_t) && !defined(_UINT16_T) && !defined(vxWorks)
+#if (UINT_MAX == UINT16_MAX) || defined (S_SPLINT_S)
+  typedef unsigned int uint16_t;
+# ifndef PRINTF_INT16_MODIFIER
+#  define PRINTF_INT16_MODIFIER ""
+# endif
+# define UINT16_C(v) ((uint16_t) (v))
+#elif (USHRT_MAX == UINT16_MAX)
+  typedef unsigned short uint16_t;
+# define UINT16_C(v) ((uint16_t) (v))
+# ifndef PRINTF_INT16_MODIFIER
+#  define PRINTF_INT16_MODIFIER "h"
+# endif
+#else
+#error "Platform not supported"
+#endif
+#endif
+
+#ifndef INT16_MAX
+# define INT16_MAX 0x7fff
+#endif
+#ifndef INT16_MIN
+# define INT16_MIN INT16_C(0x8000)
+#endif
+#if !defined(int16_t) && !defined(_INT16_T) && !defined(vxWorks)
+#if (INT_MAX == INT16_MAX) || defined (S_SPLINT_S)
+  typedef signed int int16_t;
+# define INT16_C(v) ((int16_t) (v))
+# ifndef PRINTF_INT16_MODIFIER
+#  define PRINTF_INT16_MODIFIER ""
+# endif
+#elif (SHRT_MAX == INT16_MAX)
+  typedef signed short int16_t;
+# define INT16_C(v) ((int16_t) (v))
+# ifndef PRINTF_INT16_MODIFIER
+#  define PRINTF_INT16_MODIFIER "h"
+# endif
+#else
+#error "Platform not supported"
+#endif
+#endif
+
+#ifndef UINT32_MAX
+# define UINT32_MAX (0xffffffffUL)
+#endif
+#if !defined(uint32_t) && !defined(_UINT32_T) && !defined(vxWorks)
+#if (ULONG_MAX == UINT32_MAX) || defined (S_SPLINT_S)
+  typedef unsigned long uint32_t;
+# define UINT32_C(v) v ## UL
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER "l"
+# endif
+#elif (UINT_MAX == UINT32_MAX)
+  typedef unsigned int uint32_t;
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER ""
+# endif
+# define UINT32_C(v) v ## U
+#elif (USHRT_MAX == UINT32_MAX)
+  typedef unsigned short uint32_t;
+# define UINT32_C(v) ((unsigned short) (v))
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER ""
+# endif
+#else
+#error "Platform not supported"
+#endif
+#endif
+
+#ifndef INT32_MAX
+# define INT32_MAX (0x7fffffffL)
+#endif
+#ifndef INT32_MIN
+# define INT32_MIN INT32_C(0x80000000)
+#endif
+#if !defined(int32_t) && !defined(_INT32_T) && !defined(vxWorks)
+#if (LONG_MAX == INT32_MAX) || defined (S_SPLINT_S)
+  typedef signed long int32_t;
+# define INT32_C(v) v ## L
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER "l"
+# endif
+#elif (INT_MAX == INT32_MAX)
+  typedef signed int int32_t;
+# define INT32_C(v) v
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER ""
+# endif
+#elif (SHRT_MAX == INT32_MAX)
+  typedef signed short int32_t;
+# define INT32_C(v) ((short) (v))
+# ifndef PRINTF_INT32_MODIFIER
+#  define PRINTF_INT32_MODIFIER ""
+# endif
+#else
+#error "Platform not supported"
+#endif
+#endif
+
+/*
+ *  The macro stdint_int64_defined is temporarily used to record
+ *  whether or not 64 integer support is available.  It must be
+ *  defined for any 64 integer extensions for new platforms that are
+ *  added.
+ */
+
+#undef stdint_int64_defined
+#if (defined(__STDC__) && defined(__STDC_VERSION__)) || defined (S_SPLINT_S)
+# if (__STDC__ && __STDC_VERSION__ >= 199901L) || defined (S_SPLINT_S)
+#  define stdint_int64_defined
+   typedef long long int64_t;
+   typedef unsigned long long uint64_t;
+#  define UINT64_C(v) v ## ULL
+#  define  INT64_C(v) v ## LL
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "ll"
+#  endif
+# endif
+#endif
+
+#if !defined (stdint_int64_defined)
+# if defined(__GNUC__) && !defined(vxWorks)
+#  define stdint_int64_defined
+   __extension__ typedef long long int64_t;
+   __extension__ typedef unsigned long long uint64_t;
+#  define UINT64_C(v) v ## ULL
+#  define  INT64_C(v) v ## LL
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "ll"
+#  endif
+# elif defined(__MWERKS__) || defined (__SUNPRO_C) || defined (__SUNPRO_CC) || defined (__APPLE_CC__) || defined (_LONG_LONG) || defined (_CRAYC) || defined (S_SPLINT_S)
+#  define stdint_int64_defined
+   typedef long long int64_t;
+   typedef unsigned long long uint64_t;
+#  define UINT64_C(v) v ## ULL
+#  define  INT64_C(v) v ## LL
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "ll"
+#  endif
+# elif (defined(__WATCOMC__) && defined(__WATCOM_INT64__)) || (defined(_MSC_VER) && _INTEGRAL_MAX_BITS >= 64) || (defined (__BORLANDC__) && __BORLANDC__ > 0x460) || defined (__alpha) || defined (__DECC)
+#  define stdint_int64_defined
+   typedef __int64 int64_t;
+   typedef unsigned __int64 uint64_t;
+#  define UINT64_C(v) v ## UI64
+#  define  INT64_C(v) v ## I64
+#  ifndef PRINTF_INT64_MODIFIER
+#   define PRINTF_INT64_MODIFIER "I64"
+#  endif
+# endif
+#endif
+
+#if !defined (LONG_LONG_MAX) && defined (INT64_C)
+# define LONG_LONG_MAX INT64_C (9223372036854775807)
+#endif
+#ifndef ULONG_LONG_MAX
+# define ULONG_LONG_MAX UINT64_C (18446744073709551615)
+#endif
+
+#if !defined (INT64_MAX) && defined (INT64_C)
+# define INT64_MAX INT64_C (9223372036854775807)
+#endif
+#if !defined (INT64_MIN) && defined (INT64_C)
+# define INT64_MIN INT64_C (-9223372036854775808)
+#endif
+#if !defined (UINT64_MAX) && defined (INT64_C)
+# define UINT64_MAX UINT64_C (18446744073709551615)
+#endif
+
+/*
+ *  Width of hexadecimal for number field.
+ */
+
+#ifndef PRINTF_INT64_HEX_WIDTH
+# define PRINTF_INT64_HEX_WIDTH "16"
+#endif
+#ifndef PRINTF_INT32_HEX_WIDTH
+# define PRINTF_INT32_HEX_WIDTH "8"
+#endif
+#ifndef PRINTF_INT16_HEX_WIDTH
+# define PRINTF_INT16_HEX_WIDTH "4"
+#endif
+#ifndef PRINTF_INT8_HEX_WIDTH
+# define PRINTF_INT8_HEX_WIDTH "2"
+#endif
+#ifndef PRINTF_INT64_DEC_WIDTH
+# define PRINTF_INT64_DEC_WIDTH "19"
+#endif
+#ifndef PRINTF_INT32_DEC_WIDTH
+# define PRINTF_INT32_DEC_WIDTH "10"
+#endif
+#ifndef PRINTF_INT16_DEC_WIDTH
+# define PRINTF_INT16_DEC_WIDTH "5"
+#endif
+#ifndef PRINTF_INT8_DEC_WIDTH
+# define PRINTF_INT8_DEC_WIDTH "3"
+#endif
+#ifndef PRINTF_UINT64_DEC_WIDTH
+# define PRINTF_UINT64_DEC_WIDTH "20"
+#endif
+#ifndef PRINTF_UINT32_DEC_WIDTH
+# define PRINTF_UINT32_DEC_WIDTH "10"
+#endif
+#ifndef PRINTF_UINT16_DEC_WIDTH
+# define PRINTF_UINT16_DEC_WIDTH "5"
+#endif
+#ifndef PRINTF_UINT8_DEC_WIDTH
+# define PRINTF_UINT8_DEC_WIDTH "3"
+#endif
+
+/*
+ *  Ok, lets not worry about 128 bit integers for now.  Moore's law says
+ *  we don't need to worry about that until about 2040 at which point
+ *  we'll have bigger things to worry about.
+ */
+
+#ifdef stdint_int64_defined
+  typedef int64_t intmax_t;
+  typedef uint64_t uintmax_t;
+# define  INTMAX_MAX   INT64_MAX
+# define  INTMAX_MIN   INT64_MIN
+# define UINTMAX_MAX  UINT64_MAX
+# define UINTMAX_C(v) UINT64_C(v)
+# define  INTMAX_C(v)  INT64_C(v)
+# ifndef PRINTF_INTMAX_MODIFIER
+#   define PRINTF_INTMAX_MODIFIER PRINTF_INT64_MODIFIER
+# endif
+# ifndef PRINTF_INTMAX_HEX_WIDTH
+#  define PRINTF_INTMAX_HEX_WIDTH PRINTF_INT64_HEX_WIDTH
+# endif
+# ifndef PRINTF_INTMAX_DEC_WIDTH
+#  define PRINTF_INTMAX_DEC_WIDTH PRINTF_INT64_DEC_WIDTH
+# endif
+#else
+  typedef int32_t intmax_t;
+  typedef uint32_t uintmax_t;
+# define  INTMAX_MAX   INT32_MAX
+# define UINTMAX_MAX  UINT32_MAX
+# define UINTMAX_C(v) UINT32_C(v)
+# define  INTMAX_C(v)  INT32_C(v)
+# ifndef PRINTF_INTMAX_MODIFIER
+#   define PRINTF_INTMAX_MODIFIER PRINTF_INT32_MODIFIER
+# endif
+# ifndef PRINTF_INTMAX_HEX_WIDTH
+#  define PRINTF_INTMAX_HEX_WIDTH PRINTF_INT32_HEX_WIDTH
+# endif
+# ifndef PRINTF_INTMAX_DEC_WIDTH
+#  define PRINTF_INTMAX_DEC_WIDTH PRINTF_INT32_DEC_WIDTH
+# endif
+#endif
+
+/*
+ *  Because this file currently only supports platforms which have
+ *  precise powers of 2 as bit sizes for the default integers, the
+ *  least definitions are all trivial.  Its possible that a future
+ *  version of this file could have different definitions.
+ */
+
+#ifndef stdint_least_defined
+  typedef   int8_t   int_least8_t;
+  typedef  uint8_t  uint_least8_t;
+  typedef  int16_t  int_least16_t;
+  typedef uint16_t uint_least16_t;
+  typedef  int32_t  int_least32_t;
+  typedef uint32_t uint_least32_t;
+# define PRINTF_LEAST32_MODIFIER PRINTF_INT32_MODIFIER
+# define PRINTF_LEAST16_MODIFIER PRINTF_INT16_MODIFIER
+# define  UINT_LEAST8_MAX  UINT8_MAX
+# define   INT_LEAST8_MAX   INT8_MAX
+# define UINT_LEAST16_MAX UINT16_MAX
+# define  INT_LEAST16_MAX  INT16_MAX
+# define UINT_LEAST32_MAX UINT32_MAX
+# define  INT_LEAST32_MAX  INT32_MAX
+# define   INT_LEAST8_MIN   INT8_MIN
+# define  INT_LEAST16_MIN  INT16_MIN
+# define  INT_LEAST32_MIN  INT32_MIN
+# ifdef stdint_int64_defined
+    typedef  int64_t  int_least64_t;
+    typedef uint64_t uint_least64_t;
+#   define PRINTF_LEAST64_MODIFIER PRINTF_INT64_MODIFIER
+#   define UINT_LEAST64_MAX UINT64_MAX
+#   define  INT_LEAST64_MAX  INT64_MAX
+#   define  INT_LEAST64_MIN  INT64_MIN
+# endif
+#endif
+#undef stdint_least_defined
+
+/*
+ *  The ANSI C committee pretending to know or specify anything about
+ *  performance is the epitome of misguided arrogance.  The mandate of
+ *  this file is to *ONLY* ever support that absolute minimum
+ *  definition of the fast integer types, for compatibility purposes.
+ *  No extensions, and no attempt to suggest what may or may not be a
+ *  faster integer type will ever be made in this file.  Developers are
+ *  warned to stay away from these types when using this or any other
+ *  stdint.h.
+ */
+
+typedef   int_least8_t   int_fast8_t;
+typedef  uint_least8_t  uint_fast8_t;
+typedef  int_least16_t  int_fast16_t;
+typedef uint_least16_t uint_fast16_t;
+typedef  int_least32_t  int_fast32_t;
+typedef uint_least32_t uint_fast32_t;
+#define  UINT_FAST8_MAX  UINT_LEAST8_MAX
+#define   INT_FAST8_MAX   INT_LEAST8_MAX
+#define UINT_FAST16_MAX UINT_LEAST16_MAX
+#define  INT_FAST16_MAX  INT_LEAST16_MAX
+#define UINT_FAST32_MAX UINT_LEAST32_MAX
+#define  INT_FAST32_MAX  INT_LEAST32_MAX
+#define   INT_FAST8_MIN   INT_LEAST8_MIN
+#define  INT_FAST16_MIN  INT_LEAST16_MIN
+#define  INT_FAST32_MIN  INT_LEAST32_MIN
+#ifdef stdint_int64_defined
+  typedef  int_least64_t  int_fast64_t;
+  typedef uint_least64_t uint_fast64_t;
+# define UINT_FAST64_MAX UINT_LEAST64_MAX
+# define  INT_FAST64_MAX  INT_LEAST64_MAX
+# define  INT_FAST64_MIN  INT_LEAST64_MIN
+#endif
+
+#undef stdint_int64_defined
+
+/*
+ *  Whatever piecemeal, per compiler thing we can do about the wchar_t
+ *  type limits.
+ */
+
+#if defined(__WATCOMC__) || defined(_MSC_VER) || defined (__GNUC__) && !defined(vxWorks)
+# include <wchar.h>
+# ifndef WCHAR_MIN
+#  define WCHAR_MIN 0
+# endif
+# ifndef WCHAR_MAX
+#  define WCHAR_MAX ((wchar_t)-1)
+# endif
+#endif
+
+/*
+ *  Whatever piecemeal, per compiler/platform thing we can do about the
+ *  (u)intptr_t types and limits.
+ */
+
+#if (defined (_MSC_VER) && defined (_UINTPTR_T_DEFINED)) || defined (_UINTPTR_T)
+# define STDINT_H_UINTPTR_T_DEFINED
+#endif
+
+#ifndef STDINT_H_UINTPTR_T_DEFINED
+# if defined (__alpha__) || defined (__ia64__) || defined (__x86_64__) || defined (_WIN64) || defined (__ppc64__)
+#  define stdint_intptr_bits 64
+# elif defined (__WATCOMC__) || defined (__TURBOC__)
+#  if defined(__TINY__) || defined(__SMALL__) || defined(__MEDIUM__)
+#    define stdint_intptr_bits 16
+#  else
+#    define stdint_intptr_bits 32
+#  endif
+# elif defined (__i386__) || defined (_WIN32) || defined (WIN32) || defined (__ppc64__)
+#  define stdint_intptr_bits 32
+# elif defined (__INTEL_COMPILER)
+/* TODO -- what did Intel do about x86-64? */
+# else
+/* #error "This platform might not be supported yet" */
+# endif
+
+# ifdef stdint_intptr_bits
+#  define stdint_intptr_glue3_i(a,b,c)  a##b##c
+#  define stdint_intptr_glue3(a,b,c)    stdint_intptr_glue3_i(a,b,c)
+#  ifndef PRINTF_INTPTR_MODIFIER
+#    define PRINTF_INTPTR_MODIFIER      stdint_intptr_glue3(PRINTF_INT,stdint_intptr_bits,_MODIFIER)
+#  endif
+#  ifndef PTRDIFF_MAX
+#    define PTRDIFF_MAX                 stdint_intptr_glue3(INT,stdint_intptr_bits,_MAX)
+#  endif
+#  ifndef PTRDIFF_MIN
+#    define PTRDIFF_MIN                 stdint_intptr_glue3(INT,stdint_intptr_bits,_MIN)
+#  endif
+#  ifndef UINTPTR_MAX
+#    define UINTPTR_MAX                 stdint_intptr_glue3(UINT,stdint_intptr_bits,_MAX)
+#  endif
+#  ifndef INTPTR_MAX
+#    define INTPTR_MAX                  stdint_intptr_glue3(INT,stdint_intptr_bits,_MAX)
+#  endif
+#  ifndef INTPTR_MIN
+#    define INTPTR_MIN                  stdint_intptr_glue3(INT,stdint_intptr_bits,_MIN)
+#  endif
+#  ifndef INTPTR_C
+#    define INTPTR_C(x)                 stdint_intptr_glue3(INT,stdint_intptr_bits,_C)(x)
+#  endif
+#  ifndef UINTPTR_C
+#    define UINTPTR_C(x)                stdint_intptr_glue3(UINT,stdint_intptr_bits,_C)(x)
+#  endif
+  typedef stdint_intptr_glue3(uint,stdint_intptr_bits,_t) uintptr_t;
+  typedef stdint_intptr_glue3( int,stdint_intptr_bits,_t)  intptr_t;
+# else
+/* TODO -- This following is likely wrong for some platforms, and does
+   nothing for the definition of uintptr_t. */
+  typedef ptrdiff_t intptr_t;
+# endif
+# define STDINT_H_UINTPTR_T_DEFINED
+#endif
+
+/*
+ *  Assumes sig_atomic_t is signed and we have a 2s complement machine.
+ */
+
+#ifndef SIG_ATOMIC_MAX
+# define SIG_ATOMIC_MAX ((((sig_atomic_t) 1) << (sizeof (sig_atomic_t)*CHAR_BIT-1)) - 1)
+#endif
+
+#endif
+
+#if defined (__TEST_PSTDINT_FOR_CORRECTNESS)
+
+/*
+ *  Please compile with the maximum warning settings to make sure macros are
+ *  not defined more than once.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#define glue3_aux(x,y,z) x ## y ## z
+#define glue3(x,y,z) glue3_aux(x,y,z)
+
+#define DECLU(bits) glue3(uint,bits,_t) glue3(u,bits,) = glue3(UINT,bits,_C) (0);
+#define DECLI(bits) glue3(int,bits,_t) glue3(i,bits,) = glue3(INT,bits,_C) (0);
+
+#define DECL(us,bits) glue3(DECL,us,) (bits)
+
+#define TESTUMAX(bits) glue3(u,bits,) = ~glue3(u,bits,); if (glue3(UINT,bits,_MAX) != glue3(u,bits,)) printf ("Something wrong with UINT%d_MAX\n", bits)
+
+#define REPORTERROR(msg) { err_n++; if (err_first <= 0) err_first = __LINE__; printf msg; }
+
+int main () {
+	int err_n = 0;
+	int err_first = 0;
+	DECL(I,8)
+	DECL(U,8)
+	DECL(I,16)
+	DECL(U,16)
+	DECL(I,32)
+	DECL(U,32)
+#ifdef INT64_MAX
+	DECL(I,64)
+	DECL(U,64)
+#endif
+	intmax_t imax = INTMAX_C(0);
+	uintmax_t umax = UINTMAX_C(0);
+	char str0[256], str1[256];
+
+	sprintf (str0, "%" PRINTF_INT32_MODIFIER "d", INT32_C(2147483647));
+	if (0 != strcmp (str0, "2147483647")) REPORTERROR (("Something wrong with PRINTF_INT32_MODIFIER : %s\n", str0));
+	if (atoi(PRINTF_INT32_DEC_WIDTH) != (int) strlen(str0)) REPORTERROR (("Something wrong with PRINTF_INT32_DEC_WIDTH : %s\n", PRINTF_INT32_DEC_WIDTH));
+	sprintf (str0, "%" PRINTF_INT32_MODIFIER "u", UINT32_C(4294967295));
+	if (0 != strcmp (str0, "4294967295")) REPORTERROR (("Something wrong with PRINTF_INT32_MODIFIER : %s\n", str0));
+	if (atoi(PRINTF_UINT32_DEC_WIDTH) != (int) strlen(str0)) REPORTERROR (("Something wrong with PRINTF_UINT32_DEC_WIDTH : %s\n", PRINTF_UINT32_DEC_WIDTH));
+#ifdef INT64_MAX
+	sprintf (str1, "%" PRINTF_INT64_MODIFIER "d", INT64_C(9223372036854775807));
+	if (0 != strcmp (str1, "9223372036854775807")) REPORTERROR (("Something wrong with PRINTF_INT32_MODIFIER : %s\n", str1));
+	if (atoi(PRINTF_INT64_DEC_WIDTH) != (int) strlen(str1)) REPORTERROR (("Something wrong with PRINTF_INT64_DEC_WIDTH : %s, %d\n", PRINTF_INT64_DEC_WIDTH, (int) strlen(str1)));
+	sprintf (str1, "%" PRINTF_INT64_MODIFIER "u", UINT64_C(18446744073709550591));
+	if (0 != strcmp (str1, "18446744073709550591")) REPORTERROR (("Something wrong with PRINTF_INT32_MODIFIER : %s\n", str1));
+	if (atoi(PRINTF_UINT64_DEC_WIDTH) != (int) strlen(str1)) REPORTERROR (("Something wrong with PRINTF_UINT64_DEC_WIDTH : %s, %d\n", PRINTF_UINT64_DEC_WIDTH, (int) strlen(str1)));
+#endif
+
+	sprintf (str0, "%d %x\n", 0, ~0);
+
+	sprintf (str1, "%d %x\n",  i8, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with i8 : %s\n", str1));
+	sprintf (str1, "%u %x\n",  u8, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with u8 : %s\n", str1));
+	sprintf (str1, "%d %x\n",  i16, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with i16 : %s\n", str1));
+	sprintf (str1, "%u %x\n",  u16, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with u16 : %s\n", str1));
+	sprintf (str1, "%" PRINTF_INT32_MODIFIER "d %x\n",  i32, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with i32 : %s\n", str1));
+	sprintf (str1, "%" PRINTF_INT32_MODIFIER "u %x\n",  u32, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with u32 : %s\n", str1));
+#ifdef INT64_MAX
+	sprintf (str1, "%" PRINTF_INT64_MODIFIER "d %x\n",  i64, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with i64 : %s\n", str1));
+#endif
+	sprintf (str1, "%" PRINTF_INTMAX_MODIFIER "d %x\n",  imax, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with imax : %s\n", str1));
+	sprintf (str1, "%" PRINTF_INTMAX_MODIFIER "u %x\n",  umax, ~0);
+	if (0 != strcmp (str0, str1)) REPORTERROR (("Something wrong with umax : %s\n", str1));
+
+	TESTUMAX(8);
+	TESTUMAX(16);
+	TESTUMAX(32);
+#ifdef INT64_MAX
+	TESTUMAX(64);
+#endif
+
+#define STR(v) #v
+#define Q(v) printf ("sizeof " STR(v) " = %u\n", (unsigned) sizeof (v));
+	if (err_n) {
+		printf ("pstdint.h is not correct.  Please use sizes below to correct it:\n");
+	}
+
+	Q(int)
+	Q(unsigned)
+	Q(long int)
+	Q(short int)
+	Q(int8_t)
+	Q(int16_t)
+	Q(int32_t)
+#ifdef INT64_MAX
+	Q(int64_t)
+#endif
+
+	return EXIT_SUCCESS;
+}
+
+#endif
--- a/dependencies/assimp/include/assimp/Compiler/pushpack1.h
+++ b/dependencies/assimp/include/assimp/Compiler/pushpack1.h
@ -0,0 +1,43 @@
+
+
+// ===============================================================================
+// May be included multiple times - sets structure packing to 1 
+// for all supported compilers. #include <poppack1.h> reverts the changes.
+//
+// Currently this works on the following compilers:
+// MSVC 7,8,9
+// GCC
+// BORLAND (complains about 'pack state changed but not reverted', but works)
+// Clang
+//
+//
+// USAGE:
+//
+// struct StructToBePacked {
+// } PACK_STRUCT;
+//
+// ===============================================================================
+
+#ifdef AI_PUSHPACK_IS_DEFINED
+#	error poppack1.h must be included after pushpack1.h
+#endif
+
+#if defined(_MSC_VER) ||  defined(__BORLANDC__) ||	defined (__BCPLUSPLUS__)
+#	pragma pack(push,1)
+#	define PACK_STRUCT
+#elif defined( __GNUC__ ) || defined(__clang__)
+#	if !defined(HOST_MINGW)
+#		define PACK_STRUCT	__attribute__((__packed__))
+#	else
+#		define PACK_STRUCT	__attribute__((gcc_struct, __packed__))
+#	endif
+#else
+#	error Compiler not supported
+#endif
+
+#if defined(_MSC_VER)
+// C4103: Packing was changed after the inclusion of the header, probably missing #pragma pop
+#	pragma warning (disable : 4103) 
+#endif
+
+#define AI_PUSHPACK_IS_DEFINED
--- a/dependencies/assimp/include/assimp/CreateAnimMesh.h
+++ b/dependencies/assimp/include/assimp/CreateAnimMesh.h
@ -0,0 +1,58 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file CreateAnimMesh.h
+ *  Create AnimMesh from Mesh
+ */
+#ifndef INCLUDED_AI_CREATE_ANIM_MESH_H
+#define INCLUDED_AI_CREATE_ANIM_MESH_H
+
+#include <assimp/mesh.h>
+
+namespace Assimp    {
+
+/** Create aiAnimMesh from aiMesh. */
+ASSIMP_API aiAnimMesh *aiCreateAnimMesh(const aiMesh *mesh);
+
+} // end of namespace Assimp
+#endif // INCLUDED_AI_CREATE_ANIM_MESH_H
+
--- a/dependencies/assimp/include/assimp/DefaultIOStream.h
+++ b/dependencies/assimp/include/assimp/DefaultIOStream.h
@ -0,0 +1,140 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Default file I/O using fXXX()-family of functions */
+#ifndef AI_DEFAULTIOSTREAM_H_INC
+#define AI_DEFAULTIOSTREAM_H_INC
+
+#include <stdio.h>
+#include <assimp/IOStream.hpp>
+#include <assimp/importerdesc.h>
+#include <assimp/Defines.h>
+
+namespace Assimp    {
+
+// ----------------------------------------------------------------------------------
+//! @class  DefaultIOStream
+//! @brief  Default IO implementation, use standard IO operations
+//! @note   An instance of this class can exist without a valid file handle
+//!         attached to it. All calls fail, but the instance can nevertheless be
+//!         used with no restrictions.
+class ASSIMP_API DefaultIOStream : public IOStream
+{
+    friend class DefaultIOSystem;
+#if __ANDROID__
+# if __ANDROID_API__ > 9
+#  if defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+    friend class AndroidJNIIOSystem;
+#  endif // defined(AI_CONFIG_ANDROID_JNI_ASSIMP_MANAGER_SUPPORT)
+# endif // __ANDROID_API__ > 9
+#endif // __ANDROID__
+
+protected:
+    DefaultIOStream() AI_NO_EXCEPT;
+    DefaultIOStream(FILE* pFile, const std::string &strFilename);
+
+public:
+    /** Destructor public to allow simple deletion to close the file. */
+    ~DefaultIOStream ();
+
+    // -------------------------------------------------------------------
+    /// Read from stream
+    size_t Read(void* pvBuffer,
+        size_t pSize,
+        size_t pCount);
+
+
+    // -------------------------------------------------------------------
+    /// Write to stream
+    size_t Write(const void* pvBuffer,
+        size_t pSize,
+        size_t pCount);
+
+    // -------------------------------------------------------------------
+    /// Seek specific position
+    aiReturn Seek(size_t pOffset,
+        aiOrigin pOrigin);
+
+    // -------------------------------------------------------------------
+    /// Get current seek position
+    size_t Tell() const;
+
+    // -------------------------------------------------------------------
+    /// Get size of file
+    size_t FileSize() const;
+
+    // -------------------------------------------------------------------
+    /// Flush file contents
+    void Flush();
+
+private:
+    //  File data-structure, using clib
+    FILE* mFile;
+    //  Filename
+    std::string mFilename;
+    // Cached file size
+    mutable size_t mCachedSize;
+};
+
+// ----------------------------------------------------------------------------------
+inline
+DefaultIOStream::DefaultIOStream() AI_NO_EXCEPT
+: mFile(nullptr)
+, mFilename("")
+, mCachedSize(SIZE_MAX) {
+    // empty
+}
+
+// ----------------------------------------------------------------------------------
+inline
+DefaultIOStream::DefaultIOStream (FILE* pFile, const std::string &strFilename)
+: mFile(pFile)
+, mFilename(strFilename)
+, mCachedSize(SIZE_MAX) {
+    // empty
+}
+// ----------------------------------------------------------------------------------
+
+} // ns assimp
+
+#endif //!!AI_DEFAULTIOSTREAM_H_INC
+
--- a/dependencies/assimp/include/assimp/DefaultIOSystem.h
+++ b/dependencies/assimp/include/assimp/DefaultIOSystem.h
@ -0,0 +1,93 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Default implementation of IOSystem using the standard C file functions */
+#ifndef AI_DEFAULTIOSYSTEM_H_INC
+#define AI_DEFAULTIOSYSTEM_H_INC
+
+#include <assimp/IOSystem.hpp>
+
+namespace Assimp    {
+
+// ---------------------------------------------------------------------------
+/** Default implementation of IOSystem using the standard C file functions */
+class ASSIMP_API DefaultIOSystem : public IOSystem {
+public:
+    // -------------------------------------------------------------------
+    /** Tests for the existence of a file at the given path. */
+    bool Exists( const char* pFile) const;
+
+    // -------------------------------------------------------------------
+    /** Returns the directory separator. */
+    char getOsSeparator() const;
+
+    // -------------------------------------------------------------------
+    /** Open a new file with a given path. */
+    IOStream* Open( const char* pFile, const char* pMode = "rb");
+
+    // -------------------------------------------------------------------
+    /** Closes the given file and releases all resources associated with it. */
+    void Close( IOStream* pFile);
+
+    // -------------------------------------------------------------------
+    /** Compare two paths */
+    bool ComparePaths (const char* one, const char* second) const;
+
+    /** @brief get the file name of a full filepath
+     * example: /tmp/archive.tar.gz -> archive.tar.gz
+     */
+    static std::string fileName( const std::string &path );
+
+    /** @brief get the complete base name of a full filepath
+     * example: /tmp/archive.tar.gz -> archive.tar
+     */
+    static std::string completeBaseName( const std::string &path);
+
+    /** @brief get the path of a full filepath
+     * example: /tmp/archive.tar.gz -> /tmp/
+     */
+    static std::string absolutePath( const std::string &path);
+};
+
+} //!ns Assimp
+
+#endif //AI_DEFAULTIOSYSTEM_H_INC
--- a/dependencies/assimp/include/assimp/DefaultLogger.hpp
+++ b/dependencies/assimp/include/assimp/DefaultLogger.hpp
@ -0,0 +1,188 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+/** @file DefaultLogger.hpp
+*/
+
+#ifndef INCLUDED_AI_DEFAULTLOGGER
+#define INCLUDED_AI_DEFAULTLOGGER
+
+#include "Logger.hpp"
+#include "LogStream.hpp"
+#include "NullLogger.hpp"
+#include <vector>
+
+namespace Assimp    {
+// ------------------------------------------------------------------------------------
+class IOStream;
+struct LogStreamInfo;
+
+/** default name of logfile */
+#define ASSIMP_DEFAULT_LOG_NAME "AssimpLog.txt"
+
+// ------------------------------------------------------------------------------------
+/** @brief CPP-API: Primary logging facility of Assimp.
+ *
+ *  The library stores its primary #Logger as a static member of this class.
+ *  #get() returns this primary logger. By default the underlying implementation is
+ *  just a #NullLogger which rejects all log messages. By calling #create(), logging
+ *  is turned on. To capture the log output multiple log streams (#LogStream) can be
+ *  attach to the logger. Some default streams for common streaming locations (such as
+ *  a file, std::cout, OutputDebugString()) are also provided.
+ *
+ *  If you wish to customize the logging at an even deeper level supply your own
+ *  implementation of #Logger to #set().
+ *  @note The whole logging stuff causes a small extra overhead for all imports. */
+class ASSIMP_API DefaultLogger :
+    public Logger   {
+
+public:
+
+    // ----------------------------------------------------------------------
+    /** @brief Creates a logging instance.
+     *  @param name Name for log file. Only valid in combination
+     *    with the aiDefaultLogStream_FILE flag.
+     *  @param severity Log severity, VERBOSE turns on debug messages
+     *  @param defStreams  Default log streams to be attached. Any bitwise
+     *    combination of the aiDefaultLogStream enumerated values.
+     *    If #aiDefaultLogStream_FILE is specified but an empty string is
+     *    passed for 'name', no log file is created at all.
+     *  @param  io IOSystem to be used to open external files (such as the
+     *   log file). Pass NULL to rely on the default implementation.
+     *  This replaces the default #NullLogger with a #DefaultLogger instance. */
+    static Logger *create(const char* name = ASSIMP_DEFAULT_LOG_NAME,
+        LogSeverity severity    = NORMAL,
+        unsigned int defStreams = aiDefaultLogStream_DEBUGGER | aiDefaultLogStream_FILE,
+        IOSystem* io            = NULL);
+
+    // ----------------------------------------------------------------------
+    /** @brief Setup a custom #Logger implementation.
+     *
+     *  Use this if the provided #DefaultLogger class doesn't fit into
+     *  your needs. If the provided message formatting is OK for you,
+     *  it's much easier to use #create() and to attach your own custom
+     *  output streams to it.
+     *  @param logger Pass NULL to setup a default NullLogger*/
+    static void set (Logger *logger);
+
+    // ----------------------------------------------------------------------
+    /** @brief  Getter for singleton instance
+     *   @return Only instance. This is never null, but it could be a
+     *  NullLogger. Use isNullLogger to check this.*/
+    static Logger *get();
+
+    // ----------------------------------------------------------------------
+    /** @brief  Return whether a #NullLogger is currently active
+     *  @return true if the current logger is a #NullLogger.
+     *  Use create() or set() to setup a logger that does actually do
+     *  something else than just rejecting all log messages. */
+    static bool isNullLogger();
+
+    // ----------------------------------------------------------------------
+    /** @brief  Kills the current singleton logger and replaces it with a
+     *  #NullLogger instance. */
+    static void kill();
+
+    // ----------------------------------------------------------------------
+    /** @copydoc Logger::attachStream   */
+    bool attachStream(LogStream *pStream,
+        unsigned int severity);
+
+    // ----------------------------------------------------------------------
+    /** @copydoc Logger::detatchStream */
+    bool detatchStream(LogStream *pStream,
+        unsigned int severity);
+
+private:
+    // ----------------------------------------------------------------------
+    /** @briefPrivate construction for internal use by create().
+     *  @param severity Logging granularity  */
+    explicit DefaultLogger(LogSeverity severity);
+
+    // ----------------------------------------------------------------------
+    /** @briefDestructor    */
+    ~DefaultLogger();
+
+    /** @brief  Logs debug infos, only been written when severity level VERBOSE is set */
+    void OnDebug(const char* message);
+
+    /** @brief  Logs an info message */
+    void OnInfo(const char*  message);
+
+    /** @brief  Logs a warning message */
+    void OnWarn(const char*  message);
+
+    /** @brief  Logs an error message */
+    void OnError(const char* message);
+
+    // ----------------------------------------------------------------------
+    /** @brief Writes a message to all streams */
+    void WriteToStreams(const char* message, ErrorSeverity ErrorSev );
+
+    // ----------------------------------------------------------------------
+    /** @brief Returns the thread id.
+     *  @note This is an OS specific feature, if not supported, a
+     *    zero will be returned.
+     */
+    unsigned int GetThreadID();
+
+private:
+    //  Aliases for stream container
+    typedef std::vector<LogStreamInfo*> StreamArray;
+    typedef std::vector<LogStreamInfo*>::iterator StreamIt;
+    typedef std::vector<LogStreamInfo*>::const_iterator ConstStreamIt;
+
+    //! only logging instance
+    static Logger *m_pLogger;
+    static NullLogger s_pNullLogger;
+
+    //! Attached streams
+    StreamArray m_StreamArray;
+
+    bool noRepeatMsg;
+    char lastMsg[MAX_LOG_MESSAGE_LENGTH*2];
+    size_t lastLen;
+};
+// ------------------------------------------------------------------------------------
+
+} // Namespace Assimp
+
+#endif // !! INCLUDED_AI_DEFAULTLOGGER
--- a/dependencies/assimp/include/assimp/Defines.h
+++ b/dependencies/assimp/include/assimp/Defines.h
@ -0,0 +1,49 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2012, assimp team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+// We need those constants, workaround for any platforms where nobody defined them yet
+#if (!defined SIZE_MAX)
+#   define SIZE_MAX (~((size_t)0))
+#endif
+
+#if (!defined UINT_MAX)
+#   define UINT_MAX (~((unsigned int)0))
+#endif
+
--- a/dependencies/assimp/include/assimp/Exceptional.h
+++ b/dependencies/assimp/include/assimp/Exceptional.h
@ -0,0 +1,125 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2008, assimp team
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef INCLUDED_EXCEPTIONAL_H
+#define INCLUDED_EXCEPTIONAL_H
+
+#include <stdexcept>
+#include <assimp/DefaultIOStream.h>
+using std::runtime_error;
+
+#ifdef _MSC_VER
+#   pragma warning(disable : 4275)
+#endif
+
+// ---------------------------------------------------------------------------
+/** FOR IMPORTER PLUGINS ONLY: Simple exception class to be thrown if an
+ *  unrecoverable error occurs while importing. Loading APIs return
+ *  NULL instead of a valid aiScene then.  */
+class DeadlyImportError
+    : public runtime_error
+{
+public:
+    /** Constructor with arguments */
+    explicit DeadlyImportError( const std::string& errorText)
+        : runtime_error(errorText)
+    {
+    }
+
+private:
+};
+
+typedef DeadlyImportError DeadlyExportError;
+
+#ifdef _MSC_VER
+#   pragma warning(default : 4275)
+#endif
+
+// ---------------------------------------------------------------------------
+template <typename T>
+struct ExceptionSwallower   {
+    T operator ()() const {
+        return T();
+    }
+};
+
+// ---------------------------------------------------------------------------
+template <typename T>
+struct ExceptionSwallower<T*>   {
+    T* operator ()() const {
+        return NULL;
+    }
+};
+
+// ---------------------------------------------------------------------------
+template <>
+struct ExceptionSwallower<aiReturn> {
+    aiReturn operator ()() const {
+        try {
+            throw;
+        }
+        catch (std::bad_alloc&) {
+            return aiReturn_OUTOFMEMORY;
+        }
+        catch (...) {
+            return aiReturn_FAILURE;
+        }
+    }
+};
+
+// ---------------------------------------------------------------------------
+template <>
+struct ExceptionSwallower<void> {
+    void operator ()() const {
+        return;
+    }
+};
+
+#define ASSIMP_BEGIN_EXCEPTION_REGION()\
+{\
+    try {
+
+#define ASSIMP_END_EXCEPTION_REGION(type)\
+    } catch(...) {\
+        return ExceptionSwallower<type>()();\
+    }\
+}
+
+#endif // INCLUDED_EXCEPTIONAL_H
--- a/dependencies/assimp/include/assimp/Exporter.hpp
+++ b/dependencies/assimp/include/assimp/Exporter.hpp
@ -0,0 +1,505 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file  Exporter.hpp
+*  @brief Defines the CPP-API for the Assimp export interface
+*/
+#pragma once
+#ifndef AI_EXPORT_HPP_INC
+#define AI_EXPORT_HPP_INC
+
+#ifndef ASSIMP_BUILD_NO_EXPORT
+
+#include "cexport.h"
+#include <map>
+
+namespace Assimp {
+    
+class ExporterPimpl;
+class IOSystem;
+class ProgressHandler;
+
+// ----------------------------------------------------------------------------------
+/** CPP-API: The Exporter class forms an C++ interface to the export functionality
+ * of the Open Asset Import Library. Note that the export interface is available
+ * only if Assimp has been built with ASSIMP_BUILD_NO_EXPORT not defined.
+ *
+ * The interface is modeled after the importer interface and mostly
+ * symmetric. The same rules for threading etc. apply.
+ *
+ * In a nutshell, there are two export interfaces: #Export, which writes the
+ * output file(s) either to the regular file system or to a user-supplied
+ * #IOSystem, and #ExportToBlob which returns a linked list of memory
+ * buffers (blob), each referring to one output file (in most cases
+ * there will be only one output file of course, but this extra complexity is
+ * needed since Assimp aims at supporting a wide range of file formats).
+ *
+ * #ExportToBlob is especially useful if you intend to work
+ * with the data in-memory.
+*/
+class ASSIMP_API ExportProperties;
+
+class ASSIMP_API Exporter {
+public:
+    /** Function pointer type of a Export worker function */
+    typedef void (*fpExportFunc)(const char*, IOSystem*, const aiScene*, const ExportProperties*);
+
+    /** Internal description of an Assimp export format option */
+    struct ExportFormatEntry {
+        /// Public description structure to be returned by aiGetExportFormatDescription()
+        aiExportFormatDesc mDescription;
+
+        // Worker function to do the actual exporting
+        fpExportFunc mExportFunction;
+
+        // Post-processing steps to be executed PRIOR to invoking mExportFunction
+        unsigned int mEnforcePP;
+
+        // Constructor to fill all entries
+        ExportFormatEntry( const char* pId, const char* pDesc, const char* pExtension, fpExportFunc pFunction, unsigned int pEnforcePP = 0u)
+        {
+            mDescription.id = pId;
+            mDescription.description = pDesc;
+            mDescription.fileExtension = pExtension;
+            mExportFunction = pFunction;
+            mEnforcePP = pEnforcePP;
+        }
+
+        ExportFormatEntry() :
+            mExportFunction()
+          , mEnforcePP()
+        {
+            mDescription.id = NULL;
+            mDescription.description = NULL;
+            mDescription.fileExtension = NULL;
+        }
+    };
+
+    /**
+     *  @brief  The class constructor.
+     */
+    Exporter();
+
+    /**
+    *  @brief  The class destructor.
+    */
+    ~Exporter();
+
+    // -------------------------------------------------------------------
+    /** Supplies a custom IO handler to the exporter to use to open and
+     * access files.
+     *
+     * If you need #Export to use custom IO logic to access the files,
+     * you need to supply a custom implementation of IOSystem and
+     * IOFile to the exporter.
+     *
+     * #Exporter takes ownership of the object and will destroy it
+     * afterwards. The previously assigned handler will be deleted.
+     * Pass NULL to take again ownership of your IOSystem and reset Assimp
+     * to use its default implementation, which uses plain file IO.
+     *
+     * @param pIOHandler The IO handler to be used in all file accesses
+     *   of the Importer. */
+    void SetIOHandler( IOSystem* pIOHandler);
+
+    // -------------------------------------------------------------------
+    /** Retrieves the IO handler that is currently set.
+     * You can use #IsDefaultIOHandler() to check whether the returned
+     * interface is the default IO handler provided by ASSIMP. The default
+     * handler is active as long the application doesn't supply its own
+     * custom IO handler via #SetIOHandler().
+     * @return A valid IOSystem interface, never NULL. */
+    IOSystem* GetIOHandler() const;
+
+    // -------------------------------------------------------------------
+    /** Checks whether a default IO handler is active
+     * A default handler is active as long the application doesn't
+     * supply its own custom IO handler via #SetIOHandler().
+     * @return true by default */
+    bool IsDefaultIOHandler() const;
+
+    // -------------------------------------------------------------------
+    /** Supplies a custom progress handler to the exporter. This
+     *  interface exposes an #Update() callback, which is called
+     *  more or less periodically (please don't sue us if it
+     *  isn't as periodically as you'd like it to have ...).
+     *  This can be used to implement progress bars and loading
+     *  timeouts.
+     *  @param pHandler Progress callback interface. Pass nullptr to
+     *    disable progress reporting.
+     *  @note Progress handlers can be used to abort the loading
+     *    at almost any time.*/
+    void SetProgressHandler(ProgressHandler* pHandler);
+
+    // -------------------------------------------------------------------
+    /** Exports the given scene to a chosen file format. Returns the exported
+    * data as a binary blob which you can write into a file or something.
+    * When you're done with the data, simply let the #Exporter instance go
+    * out of scope to have it released automatically.
+    * @param pScene The scene to export. Stays in possession of the caller,
+    *   is not changed by the function.
+    * @param pFormatId ID string to specify to which format you want to
+    *   export to. Use
+    * #GetExportFormatCount / #GetExportFormatDescription to learn which
+    *   export formats are available.
+    * @param pPreprocessing See the documentation for #Export
+    * @return the exported data or NULL in case of error.
+    * @note If the Exporter instance did already hold a blob from
+    *   a previous call to #ExportToBlob, it will be disposed.
+    *   Any IO handlers set via #SetIOHandler are ignored here.
+    * @note Use aiCopyScene() to get a modifiable copy of a previously
+    *   imported scene. */
+    const aiExportDataBlob* ExportToBlob(const aiScene* pScene, const char* pFormatId,
+        unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = nullptr);
+    const aiExportDataBlob* ExportToBlob(  const aiScene* pScene, const std::string& pFormatId,
+        unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = nullptr);
+
+    // -------------------------------------------------------------------
+    /** Convenience function to export directly to a file. Use
+     *  #SetIOSystem to supply a custom IOSystem to gain fine-grained control
+     *  about the output data flow of the export process.
+     * @param pBlob A data blob obtained from a previous call to #aiExportScene. Must not be NULL.
+     * @param pPath Full target file name. Target must be accessible.
+     * @param pPreprocessing Accepts any choice of the #aiPostProcessSteps enumerated
+     *   flags, but in reality only a subset of them makes sense here. Specifying
+     *   'preprocessing' flags is useful if the input scene does not conform to
+     *   Assimp's default conventions as specified in the @link data Data Structures Page @endlink.
+     *   In short, this means the geometry data should use a right-handed coordinate systems, face
+     *   winding should be counter-clockwise and the UV coordinate origin is assumed to be in
+     *   the upper left. The #aiProcess_MakeLeftHanded, #aiProcess_FlipUVs and
+     *   #aiProcess_FlipWindingOrder flags are used in the import side to allow users
+     *   to have those defaults automatically adapted to their conventions. Specifying those flags
+     *   for exporting has the opposite effect, respectively. Some other of the
+     *   #aiPostProcessSteps enumerated values may be useful as well, but you'll need
+     *   to try out what their effect on the exported file is. Many formats impose
+     *   their own restrictions on the structure of the geometry stored therein,
+     *   so some preprocessing may have little or no effect at all, or may be
+     *   redundant as exporters would apply them anyhow. A good example
+     *   is triangulation - whilst you can enforce it by specifying
+     *   the #aiProcess_Triangulate flag, most export formats support only
+     *   triangulate data so they would run the step even if it wasn't requested.
+     *
+     *   If assimp detects that the input scene was directly taken from the importer side of
+     *   the library (i.e. not copied using aiCopyScene and potentially modified afterwards),
+     *   any post-processing steps already applied to the scene will not be applied again, unless
+     *   they show non-idempotent behavior (#aiProcess_MakeLeftHanded, #aiProcess_FlipUVs and
+     *   #aiProcess_FlipWindingOrder).
+     * @return AI_SUCCESS if everything was fine.
+     * @note Use aiCopyScene() to get a modifiable copy of a previously
+     *   imported scene.*/
+    aiReturn Export( const aiScene* pScene, const char* pFormatId, const char* pPath,
+        unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = nullptr);
+    aiReturn Export( const aiScene* pScene, const std::string& pFormatId, const std::string& pPath,
+        unsigned int pPreprocessing = 0u, const ExportProperties* pProperties = nullptr);
+
+    // -------------------------------------------------------------------
+    /** Returns an error description of an error that occurred in #Export
+     *    or #ExportToBlob
+     *
+     * Returns an empty string if no error occurred.
+     * @return A description of the last error, an empty string if no
+     *   error occurred. The string is never NULL.
+     *
+     * @note The returned function remains valid until one of the
+     * following methods is called: #Export, #ExportToBlob, #FreeBlob */
+    const char* GetErrorString() const;
+
+    // -------------------------------------------------------------------
+    /** Return the blob obtained from the last call to #ExportToBlob */
+    const aiExportDataBlob* GetBlob() const;
+
+    // -------------------------------------------------------------------
+    /** Orphan the blob from the last call to #ExportToBlob. This means
+     *  the caller takes ownership and is thus responsible for calling
+     *  the C API function #aiReleaseExportBlob to release it. */
+    const aiExportDataBlob* GetOrphanedBlob() const;
+
+    // -------------------------------------------------------------------
+    /** Frees the current blob.
+     *
+     *  The function does nothing if no blob has previously been
+     *  previously produced via #ExportToBlob. #FreeBlob is called
+     *  automatically by the destructor. The only reason to call
+     *  it manually would be to reclaim as much storage as possible
+     *  without giving up the #Exporter instance yet. */
+    void FreeBlob( );
+
+    // -------------------------------------------------------------------
+    /** Returns the number of export file formats available in the current
+     *  Assimp build. Use #Exporter::GetExportFormatDescription to
+     *  retrieve infos of a specific export format.
+     *
+     *  This includes built-in exporters as well as exporters registered
+     *  using #RegisterExporter.
+     **/
+    size_t GetExportFormatCount() const;
+
+    // -------------------------------------------------------------------
+    /** Returns a description of the nth export file format. Use #
+     *  #Exporter::GetExportFormatCount to learn how many export
+     *  formats are supported.
+     *
+     * The returned pointer is of static storage duration if the
+     * pIndex pertains to a built-in exporter (i.e. one not registered
+     * via #RegistrerExporter). It is restricted to the life-time of the
+     * #Exporter instance otherwise.
+     *
+     * @param pIndex Index of the export format to retrieve information
+     *  for. Valid range is 0 to #Exporter::GetExportFormatCount
+     * @return A description of that specific export format.
+     *  NULL if pIndex is out of range. */
+    const aiExportFormatDesc* GetExportFormatDescription( size_t pIndex ) const;
+
+    // -------------------------------------------------------------------
+    /** Register a custom exporter. Custom export formats are limited to
+     *    to the current #Exporter instance and do not affect the
+     *    library globally. The indexes under which the format's
+     *    export format description can be queried are assigned
+     *    monotonously.
+     *  @param desc Exporter description.
+     *  @return aiReturn_SUCCESS if the export format was successfully
+     *    registered. A common cause that would prevent an exporter
+     *    from being registered is that its format id is already
+     *    occupied by another format. */
+    aiReturn RegisterExporter(const ExportFormatEntry& desc);
+
+    // -------------------------------------------------------------------
+    /** Remove an export format previously registered with #RegisterExporter
+     *  from the #Exporter instance (this can also be used to drop
+     *  built-in exporters because those are implicitly registered
+     *  using #RegisterExporter).
+     *  @param id Format id to be unregistered, this refers to the
+     *    'id' field of #aiExportFormatDesc.
+     *  @note Calling this method on a format description not yet registered
+     *    has no effect.*/
+    void UnregisterExporter(const char* id);
+
+protected:
+    // Just because we don't want you to know how we're hacking around.
+    ExporterPimpl* pimpl;
+};
+
+class ASSIMP_API ExportProperties {
+public:
+    // Data type to store the key hash
+    typedef unsigned int KeyType;
+
+    // typedefs for our four configuration maps.
+    // We don't need more, so there is no need for a generic solution
+    typedef std::map<KeyType, int> IntPropertyMap;
+    typedef std::map<KeyType, ai_real> FloatPropertyMap;
+    typedef std::map<KeyType, std::string> StringPropertyMap;
+    typedef std::map<KeyType, aiMatrix4x4> MatrixPropertyMap;
+
+public:
+    /** Standard constructor
+    * @see ExportProperties()
+    */
+    ExportProperties();
+
+    // -------------------------------------------------------------------
+    /** Copy constructor.
+     *
+     * This copies the configuration properties of another ExportProperties.
+     * @see ExportProperties(const ExportProperties& other)
+     */
+    ExportProperties(const ExportProperties& other);
+
+    // -------------------------------------------------------------------
+    /** Set an integer configuration property.
+     * @param szName Name of the property. All supported properties
+     *   are defined in the aiConfig.g header (all constants share the
+     *   prefix AI_CONFIG_XXX and are simple strings).
+     * @param iValue New value of the property
+     * @return true if the property was set before. The new value replaces
+     *   the previous value in this case.
+     * @note Property of different types (float, int, string ..) are kept
+     *   on different stacks, so calling SetPropertyInteger() for a
+     *   floating-point property has no effect - the loader will call
+     *   GetPropertyFloat() to read the property, but it won't be there.
+     */
+    bool SetPropertyInteger(const char* szName, int iValue);
+
+    // -------------------------------------------------------------------
+    /** Set a boolean configuration property. Boolean properties
+     *  are stored on the integer stack internally so it's possible
+     *  to set them via #SetPropertyBool and query them with
+     *  #GetPropertyBool and vice versa.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyBool(const char* szName, bool value)    {
+        return SetPropertyInteger(szName,value);
+    }
+
+    // -------------------------------------------------------------------
+    /** Set a floating-point configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyFloat(const char* szName, ai_real fValue);
+
+    // -------------------------------------------------------------------
+    /** Set a string configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyString(const char* szName, const std::string& sValue);
+
+    // -------------------------------------------------------------------
+    /** Set a matrix configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyMatrix(const char* szName, const aiMatrix4x4& sValue);
+
+    // -------------------------------------------------------------------
+    /** Get a configuration property.
+     * @param szName Name of the property. All supported properties
+     *   are defined in the aiConfig.g header (all constants share the
+     *   prefix AI_CONFIG_XXX).
+     * @param iErrorReturn Value that is returned if the property
+     *   is not found.
+     * @return Current value of the property
+     * @note Property of different types (float, int, string ..) are kept
+     *   on different lists, so calling SetPropertyInteger() for a
+     *   floating-point property has no effect - the loader will call
+     *   GetPropertyFloat() to read the property, but it won't be there.
+     */
+    int GetPropertyInteger(const char* szName,
+        int iErrorReturn = 0xffffffff) const;
+
+    // -------------------------------------------------------------------
+    /** Get a boolean configuration property. Boolean properties
+     *  are stored on the integer stack internally so it's possible
+     *  to set them via #SetPropertyBool and query them with
+     *  #GetPropertyBool and vice versa.
+     * @see GetPropertyInteger()
+     */
+    bool GetPropertyBool(const char* szName, bool bErrorReturn = false) const {
+        return GetPropertyInteger(szName,bErrorReturn)!=0;
+    }
+
+    // -------------------------------------------------------------------
+    /** Get a floating-point configuration property
+     * @see GetPropertyInteger()
+     */
+    ai_real GetPropertyFloat(const char* szName,
+        ai_real fErrorReturn = 10e10f) const;
+
+    // -------------------------------------------------------------------
+    /** Get a string configuration property
+     *
+     *  The return value remains valid until the property is modified.
+     * @see GetPropertyInteger()
+     */
+    const std::string GetPropertyString(const char* szName,
+        const std::string& sErrorReturn = "") const;
+
+    // -------------------------------------------------------------------
+    /** Get a matrix configuration property
+     *
+     *  The return value remains valid until the property is modified.
+     * @see GetPropertyInteger()
+     */
+    const aiMatrix4x4 GetPropertyMatrix(const char* szName,
+        const aiMatrix4x4& sErrorReturn = aiMatrix4x4()) const;
+
+    // -------------------------------------------------------------------
+    /** Determine a integer configuration property has been set.
+    * @see HasPropertyInteger()
+     */
+    bool HasPropertyInteger(const char* szName) const;
+
+    /** Determine a boolean configuration property has been set.
+    * @see HasPropertyBool()
+     */
+    bool HasPropertyBool(const char* szName) const;
+
+    /** Determine a boolean configuration property has been set.
+    * @see HasPropertyFloat()
+     */
+    bool HasPropertyFloat(const char* szName) const;
+
+    /** Determine a String configuration property has been set.
+    * @see HasPropertyString()
+     */
+    bool HasPropertyString(const char* szName) const;
+
+    /** Determine a Matrix configuration property has been set.
+    * @see HasPropertyMatrix()
+     */
+    bool HasPropertyMatrix(const char* szName) const;
+
+protected:
+
+    /** List of integer properties */
+    IntPropertyMap mIntProperties;
+
+    /** List of floating-point properties */
+    FloatPropertyMap mFloatProperties;
+
+    /** List of string properties */
+    StringPropertyMap mStringProperties;
+
+    /** List of Matrix properties */
+    MatrixPropertyMap mMatrixProperties;
+};
+
+// ----------------------------------------------------------------------------------
+inline 
+const aiExportDataBlob* Exporter::ExportToBlob(  const aiScene* pScene, const std::string& pFormatId,
+                                                 unsigned int pPreprocessing, const ExportProperties* pProperties)
+{
+    return ExportToBlob(pScene,pFormatId.c_str(),pPreprocessing, pProperties);
+}
+
+// ----------------------------------------------------------------------------------
+inline
+aiReturn Exporter :: Export( const aiScene* pScene, const std::string& pFormatId, 
+                                    const std::string& pPath, unsigned int pPreprocessing, 
+                                    const ExportProperties* pProperties)
+{
+    return Export(pScene,pFormatId.c_str(),pPath.c_str(),pPreprocessing, pProperties);
+}
+
+} // namespace Assimp
+
+#endif // ASSIMP_BUILD_NO_EXPORT
+#endif // AI_EXPORT_HPP_INC
--- a/dependencies/assimp/include/assimp/GenericProperty.h
+++ b/dependencies/assimp/include/assimp/GenericProperty.h
@ -0,0 +1,133 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef AI_GENERIC_PROPERTY_H_INCLUDED
+#define AI_GENERIC_PROPERTY_H_INCLUDED
+
+#include <assimp/Importer.hpp>
+#include <assimp/ai_assert.h>
+#include "Hash.h"
+
+#include <map>
+
+// ------------------------------------------------------------------------------------------------
+template <class T>
+inline
+bool SetGenericProperty(std::map< unsigned int, T >& list,
+        const char* szName, const T& value) {
+    ai_assert(nullptr != szName);
+    const uint32_t hash = SuperFastHash(szName);
+
+    typename std::map<unsigned int, T>::iterator it = list.find(hash);
+    if (it == list.end())   {
+        list.insert(std::pair<unsigned int, T>( hash, value ));
+        return false;
+    }
+    (*it).second = value;
+
+    return true;
+}
+
+// ------------------------------------------------------------------------------------------------
+template <class T>
+inline
+const T& GetGenericProperty(const std::map< unsigned int, T >& list,
+        const char* szName, const T& errorReturn) {
+    ai_assert(nullptr != szName);
+    const uint32_t hash = SuperFastHash(szName);
+
+    typename std::map<unsigned int, T>::const_iterator it = list.find(hash);
+    if (it == list.end()) {
+        return errorReturn;
+    }
+
+    return (*it).second;
+}
+
+// ------------------------------------------------------------------------------------------------
+// Special version for pointer types - they will be deleted when replaced with another value
+// passing NULL removes the whole property
+template <class T>
+inline
+void SetGenericPropertyPtr(std::map< unsigned int, T* >& list,
+        const char* szName, T* value, bool* bWasExisting = nullptr ) {
+    ai_assert(nullptr != szName);
+    const uint32_t hash = SuperFastHash(szName);
+
+    typename std::map<unsigned int, T*>::iterator it = list.find(hash);
+    if (it == list.end())   {
+        if (bWasExisting) {
+            *bWasExisting = false;
+        }
+
+        list.insert(std::pair<unsigned int,T*>( hash, value ));
+        return;
+    }
+    if ((*it).second != value)  {
+        delete (*it).second;
+        (*it).second = value;
+    }
+    if (!value) {
+        list.erase(it);
+    }
+    if (bWasExisting) {
+        *bWasExisting = true;
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+template <class T>
+inline
+bool HasGenericProperty(const std::map< unsigned int, T >& list,
+        const char* szName) {
+    ai_assert(nullptr != szName);
+    const uint32_t hash = SuperFastHash(szName);
+
+    typename std::map<unsigned int, T>::const_iterator it = list.find(hash);
+    if (it == list.end()) {
+        return false;
+    }
+
+    return true;
+}
+
+#endif // !! AI_GENERIC_PROPERTY_H_INCLUDED
--- a/dependencies/assimp/include/assimp/Hash.h
+++ b/dependencies/assimp/include/assimp/Hash.h
@ -0,0 +1,118 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+#ifndef AI_HASH_H_INCLUDED
+#define AI_HASH_H_INCLUDED
+
+#include <stdint.h>
+#include <string.h>
+
+// ------------------------------------------------------------------------------------------------
+// Hashing function taken from
+// http://www.azillionmonkeys.com/qed/hash.html
+// (incremental version)
+//
+// This code is Copyright 2004-2008 by Paul Hsieh. It is used here in the belief that
+// Assimp's license is considered compatible with Pauls's derivative license as specified
+// on his web page.
+//
+// (stdint.h should have been been included here)
+// ------------------------------------------------------------------------------------------------
+#undef get16bits
+#if (defined(__GNUC__) && defined(__i386__)) || defined(__WATCOMC__) \
+  || defined(_MSC_VER) || defined (__BORLANDC__) || defined (__TURBOC__)
+#define get16bits(d) (*((const uint16_t *) (d)))
+#endif
+
+#if !defined (get16bits)
+#define get16bits(d) ((((uint32_t)(((const uint8_t *)(d))[1])) << 8)\
+                       +(uint32_t)(((const uint8_t *)(d))[0]) )
+#endif
+
+// ------------------------------------------------------------------------------------------------
+inline uint32_t SuperFastHash (const char * data, uint32_t len = 0, uint32_t hash = 0) {
+uint32_t tmp;
+int rem;
+
+    if (!data) return 0;
+    if (!len)len = (uint32_t)::strlen(data);
+
+    rem = len & 3;
+    len >>= 2;
+
+    /* Main loop */
+    for (;len > 0; len--) {
+        hash  += get16bits (data);
+        tmp    = (get16bits (data+2) << 11) ^ hash;
+        hash   = (hash << 16) ^ tmp;
+        data  += 2*sizeof (uint16_t);
+        hash  += hash >> 11;
+    }
+
+    /* Handle end cases */
+    switch (rem) {
+        case 3: hash += get16bits (data);
+                hash ^= hash << 16;
+                hash ^= data[sizeof (uint16_t)] << 18;
+                hash += hash >> 11;
+                break;
+        case 2: hash += get16bits (data);
+                hash ^= hash << 11;
+                hash += hash >> 17;
+                break;
+        case 1: hash += *data;
+                hash ^= hash << 10;
+                hash += hash >> 1;
+    }
+
+    /* Force "avalanching" of final 127 bits */
+    hash ^= hash << 3;
+    hash += hash >> 5;
+    hash ^= hash << 4;
+    hash += hash >> 17;
+    hash ^= hash << 25;
+    hash += hash >> 6;
+
+    return hash;
+}
+
+#endif // !! AI_HASH_H_INCLUDED
--- a/dependencies/assimp/include/assimp/IOStream.hpp
+++ b/dependencies/assimp/include/assimp/IOStream.hpp
@ -0,0 +1,142 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+/** @file IOStream.hpp
+ *  @brief File I/O wrappers for C++.
+ */
+
+#pragma once
+#ifndef AI_IOSTREAM_H_INC
+#define AI_IOSTREAM_H_INC
+
+#include "types.h"
+
+#ifndef __cplusplus
+#   error This header requires C++ to be used. aiFileIO.h is the \
+    corresponding C interface.
+#endif
+
+namespace Assimp    {
+
+// ----------------------------------------------------------------------------------
+/** @brief CPP-API: Class to handle file I/O for C++
+ *
+ *  Derive an own implementation from this interface to provide custom IO handling
+ *  to the Importer. If you implement this interface, be sure to also provide an
+ *  implementation for IOSystem that creates instances of your custom IO class.
+*/
+class ASSIMP_API IOStream
+#ifndef SWIG
+    : public Intern::AllocateFromAssimpHeap
+#endif
+{
+protected:
+    /** Constructor protected, use IOSystem::Open() to create an instance. */
+    IOStream() AI_NO_EXCEPT;
+
+public:
+    // -------------------------------------------------------------------
+    /** @brief Destructor. Deleting the object closes the underlying file,
+     * alternatively you may use IOSystem::Close() to release the file.
+     */
+    virtual ~IOStream();
+
+    // -------------------------------------------------------------------
+    /** @brief Read from the file
+     *
+     * See fread() for more details
+     * This fails for write-only files */
+    virtual size_t Read(void* pvBuffer,
+        size_t pSize,
+        size_t pCount) = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Write to the file
+    *
+    * See fwrite() for more details
+    * This fails for read-only files */
+    virtual size_t Write(const void* pvBuffer,
+        size_t pSize,
+        size_t pCount) = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Set the read/write cursor of the file
+     *
+     * Note that the offset is _negative_ for aiOrigin_END.
+     * See fseek() for more details */
+    virtual aiReturn Seek(size_t pOffset,
+        aiOrigin pOrigin) = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Get the current position of the read/write cursor
+     *
+     * See ftell() for more details */
+    virtual size_t Tell() const = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Returns filesize
+     *  Returns the filesize. */
+    virtual size_t FileSize() const = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Flush the contents of the file buffer (for writers)
+     *  See fflush() for more details.
+     */
+    virtual void Flush() = 0;
+}; //! class IOStream
+
+// ----------------------------------------------------------------------------------
+inline
+IOStream::IOStream() AI_NO_EXCEPT {
+    // empty
+}
+
+// ----------------------------------------------------------------------------------
+inline
+IOStream::~IOStream() {
+    // empty
+}
+// ----------------------------------------------------------------------------------
+
+} //!namespace Assimp
+
+#endif //!!AI_IOSTREAM_H_INC
--- a/dependencies/assimp/include/assimp/IOStreamBuffer.h
+++ b/dependencies/assimp/include/assimp/IOStreamBuffer.h
@ -0,0 +1,355 @@
+#pragma once
+
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+#include <assimp/types.h>
+#include <assimp/IOStream.hpp>
+
+#include "ParsingUtils.h"
+
+#include <vector>
+
+namespace Assimp {
+
+// ---------------------------------------------------------------------------
+/**
+ *  Implementation of a cached stream buffer.
+ */
+template<class T>
+class IOStreamBuffer {
+public:
+    /// @brief  The class constructor.
+    IOStreamBuffer( size_t cache = 4096 * 4096 );
+
+    /// @brief  The class destructor.
+    ~IOStreamBuffer();
+
+    /// @brief  Will open the cached access for a given stream.
+    /// @param  stream      The stream to cache.
+    /// @return true if successful.
+    bool open( IOStream *stream );
+
+    /// @brief  Will close the cached access.
+    /// @return true if successful.
+    bool close();
+
+    /// @brief  Returns the file-size.
+    /// @return The file-size.
+    size_t size() const;
+    
+    /// @brief  Returns the cache size.
+    /// @return The cache size.
+    size_t cacheSize() const;
+
+    /// @brief  Will read the next block.
+    /// @return true if successful.
+    bool readNextBlock();
+
+    /// @brief  Returns the number of blocks to read.
+    /// @return The number of blocks.
+    size_t getNumBlocks() const;
+
+    /// @brief  Returns the current block index.
+    /// @return The current block index.
+    size_t getCurrentBlockIndex() const;
+
+    /// @brief  Returns the current file pos.
+    /// @return The current file pos.
+    size_t getFilePos() const;
+
+    /// @brief  Will read the next line.
+    /// @param  buffer      The buffer for the next line.
+    /// @return true if successful.
+    bool getNextDataLine( std::vector<T> &buffer, T continuationToken );
+
+    /// @brief  Will read the next line ascii or binary end line char.
+    /// @param  buffer      The buffer for the next line.
+    /// @return true if successful.
+    bool getNextLine(std::vector<T> &buffer);
+
+    /// @brief  Will read the next block.
+    /// @param  buffer      The buffer for the next block.
+    /// @return true if successful.
+    bool getNextBlock( std::vector<T> &buffer );
+
+private:
+    IOStream *m_stream;
+    size_t m_filesize;
+    size_t m_cacheSize;
+    size_t m_numBlocks;
+    size_t m_blockIdx;
+    std::vector<T> m_cache;
+    size_t m_cachePos;
+    size_t m_filePos;
+};
+
+template<class T>
+inline
+IOStreamBuffer<T>::IOStreamBuffer( size_t cache )
+: m_stream( nullptr )
+, m_filesize( 0 )
+, m_cacheSize( cache )
+, m_numBlocks( 0 )
+, m_blockIdx( 0 )
+, m_cachePos( 0 )
+, m_filePos( 0 ) {
+    m_cache.resize( cache );
+    std::fill( m_cache.begin(), m_cache.end(), '\n' );
+}
+
+template<class T>
+inline
+IOStreamBuffer<T>::~IOStreamBuffer() {
+    // empty
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::open( IOStream *stream ) {
+    //  file still opened!
+    if ( nullptr != m_stream ) {
+        return false;
+    }
+
+    //  Invalid stream pointer
+    if ( nullptr == stream ) {
+        return false;
+    }
+
+    m_stream = stream;
+    m_filesize = m_stream->FileSize();
+    if ( m_filesize == 0 ) {
+        return false;
+    }
+    if ( m_filesize < m_cacheSize ) {
+        m_cacheSize = m_filesize;
+    }
+
+    m_numBlocks = m_filesize / m_cacheSize;
+    if ( ( m_filesize % m_cacheSize ) > 0 ) {
+        m_numBlocks++;
+    }
+
+    return true;
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::close() {
+    if ( nullptr == m_stream ) {
+        return false;
+    }
+
+    // init counters and state vars
+    m_stream    = nullptr;
+    m_filesize  = 0;
+    m_numBlocks = 0;
+    m_blockIdx  = 0;
+    m_cachePos  = 0;
+    m_filePos   = 0;
+
+    return true;
+}
+
+template<class T>
+inline
+size_t IOStreamBuffer<T>::size() const {
+    return m_filesize;
+}
+
+template<class T>
+inline
+size_t IOStreamBuffer<T>::cacheSize() const {
+    return m_cacheSize;
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::readNextBlock() {
+    m_stream->Seek( m_filePos, aiOrigin_SET );
+    size_t readLen = m_stream->Read( &m_cache[ 0 ], sizeof( T ), m_cacheSize );
+    if ( readLen == 0 ) {
+        return false;
+    }
+    if ( readLen < m_cacheSize ) {
+        m_cacheSize = readLen;
+    }
+    m_filePos += m_cacheSize;
+    m_cachePos = 0;
+    m_blockIdx++;
+
+    return true;
+}
+
+template<class T>
+inline
+size_t IOStreamBuffer<T>::getNumBlocks() const {
+    return m_numBlocks;
+}
+
+template<class T>
+inline
+size_t IOStreamBuffer<T>::getCurrentBlockIndex() const {
+    return m_blockIdx;
+}
+
+template<class T>
+inline
+size_t IOStreamBuffer<T>::getFilePos() const {
+    return m_filePos;
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::getNextDataLine( std::vector<T> &buffer, T continuationToken ) {
+    buffer.resize( m_cacheSize );
+    if ( m_cachePos >= m_cacheSize || 0 == m_filePos ) {
+        if ( !readNextBlock() ) {
+            return false;
+        }
+    }
+
+    bool continuationFound( false );
+    size_t i = 0;
+    for( ;; ) {
+        if ( continuationToken == m_cache[ m_cachePos ] ) {
+            continuationFound = true;
+            ++m_cachePos;
+        }
+        if ( IsLineEnd( m_cache[ m_cachePos ] ) ) {
+            if ( !continuationFound ) {
+                // the end of the data line
+                break;
+            } else {
+                // skip line end
+                while ( m_cache[m_cachePos] != '\n') {
+                    ++m_cachePos;
+                }
+                ++m_cachePos;
+                continuationFound = false;
+            }
+        }
+
+        buffer[ i ] = m_cache[ m_cachePos ];
+        ++m_cachePos;
+        ++i;
+        if (m_cachePos >= size()) {
+            break;
+        }
+        if ( m_cachePos >= m_cacheSize ) {
+            if ( !readNextBlock() ) {
+                return false;
+            }
+        }
+    }
+    
+    buffer[ i ] = '\n';
+    ++m_cachePos;
+
+    return true;
+}
+
+static inline
+bool isEndOfCache( size_t pos, size_t cacheSize ) {
+    return ( pos == cacheSize );
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::getNextLine(std::vector<T> &buffer) {
+    buffer.resize(m_cacheSize);
+    if ( isEndOfCache( m_cachePos, m_cacheSize ) || 0 == m_filePos) {
+       if (!readNextBlock()) {
+          return false;
+       }
+      }
+
+    if (IsLineEnd(m_cache[m_cachePos])) {
+        // skip line end
+        while (m_cache[m_cachePos] != '\n') {
+            ++m_cachePos;
+        }
+        ++m_cachePos;
+        if ( isEndOfCache( m_cachePos, m_cacheSize ) ) {
+            if ( !readNextBlock() ) {
+                return false;
+            }
+        }
+    }
+
+    size_t i( 0 );
+    while (!IsLineEnd(m_cache[ m_cachePos ])) {
+        buffer[i] = m_cache[ m_cachePos ];
+        ++m_cachePos;
+        ++i;
+        if (m_cachePos >= m_cacheSize) {
+            if (!readNextBlock()) {
+                return false;
+            }
+        }
+    }
+    buffer[i] = '\n';
+    ++m_cachePos;
+
+    return true;
+}
+
+template<class T>
+inline
+bool IOStreamBuffer<T>::getNextBlock( std::vector<T> &buffer) {
+    // Return the last block-value if getNextLine was used before
+    if ( 0 != m_cachePos ) {      
+        buffer = std::vector<T>( m_cache.begin() + m_cachePos, m_cache.end() );
+        m_cachePos = 0;
+    } else {
+        if ( !readNextBlock() ) {
+            return false;
+        }
+
+        buffer = std::vector<T>(m_cache.begin(), m_cache.end());
+    }
+
+    return true;
+}
+
+} // !ns Assimp
--- a/dependencies/assimp/include/assimp/IOSystem.hpp
+++ b/dependencies/assimp/include/assimp/IOSystem.hpp
@ -0,0 +1,357 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file IOSystem.hpp
+ *  @brief File system wrapper for C++. Inherit this class to supply
+ *  custom file handling logic to the Import library.
+*/
+
+#pragma once
+#ifndef AI_IOSYSTEM_H_INC
+#define AI_IOSYSTEM_H_INC
+
+#ifndef __cplusplus
+#   error This header requires C++ to be used. aiFileIO.h is the \
+    corresponding C interface.
+#endif
+
+#include "types.h"
+
+#ifdef _WIN32
+#   include <direct.h>  
+#   include <stdlib.h>  
+#   include <stdio.h>  
+#else
+#   include <sys/stat.h>
+#   include <sys/types.h>
+#   include <unistd.h>
+#endif // _WIN32
+
+#include <vector>
+
+namespace Assimp    {
+
+    class IOStream;
+
+// ---------------------------------------------------------------------------
+/** @brief CPP-API: Interface to the file system.
+ *
+ *  Derive an own implementation from this interface to supply custom file handling
+ *  to the importer library. If you implement this interface, you also want to
+ *  supply a custom implementation for IOStream.
+ *
+ *  @see Importer::SetIOHandler() 
+ */
+class ASSIMP_API IOSystem
+#ifndef SWIG
+    : public Intern::AllocateFromAssimpHeap
+#endif
+{
+public:
+
+    // -------------------------------------------------------------------
+    /** @brief Default constructor.
+     *
+     *  Create an instance of your derived class and assign it to an
+     *  #Assimp::Importer instance by calling Importer::SetIOHandler().
+     */
+    IOSystem() AI_NO_EXCEPT;
+
+    // -------------------------------------------------------------------
+    /** @brief Virtual destructor.
+     *
+     *  It is safe to be called from within DLL Assimp, we're constructed
+     *  on Assimp's heap.
+     */
+    virtual ~IOSystem();
+
+    // -------------------------------------------------------------------
+    /** @brief For backward compatibility
+     *  @see Exists(const char*)
+     */
+    AI_FORCE_INLINE bool Exists( const std::string& pFile) const;
+
+    // -------------------------------------------------------------------
+    /** @brief Tests for the existence of a file at the given path.
+     *
+     * @param pFile Path to the file
+     * @return true if there is a file with this path, else false.
+     */
+    virtual bool Exists( const char* pFile) const = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Returns the system specific directory separator
+     *  @return System specific directory separator
+     */
+    virtual char getOsSeparator() const = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Open a new file with a given path.
+     *
+     *  When the access to the file is finished, call Close() to release
+     *  all associated resources (or the virtual dtor of the IOStream).
+     *
+     *  @param pFile Path to the file
+     *  @param pMode Desired file I/O mode. Required are: "wb", "w", "wt",
+     *         "rb", "r", "rt".
+     *
+     *  @return New IOStream interface allowing the lib to access
+     *         the underlying file.
+     *  @note When implementing this class to provide custom IO handling,
+     *  you probably have to supply an own implementation of IOStream as well.
+     */
+    virtual IOStream* Open(const char* pFile,
+        const char* pMode = "rb") = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief For backward compatibility
+     *  @see Open(const char*, const char*)
+     */
+    inline IOStream* Open(const std::string& pFile,
+        const std::string& pMode = std::string("rb"));
+
+    // -------------------------------------------------------------------
+    /** @brief Closes the given file and releases all resources
+     *    associated with it.
+     *  @param pFile The file instance previously created by Open().
+     */
+    virtual void Close( IOStream* pFile) = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Compares two paths and check whether the point to
+     *         identical files.
+     *
+     * The dummy implementation of this virtual member performs a
+     * case-insensitive comparison of the given strings. The default IO
+     * system implementation uses OS mechanisms to convert relative into
+     * absolute paths, so the result can be trusted.
+     * @param one First file
+     * @param second Second file
+     * @return true if the paths point to the same file. The file needn't
+     *   be existing, however.
+     */
+    virtual bool ComparePaths (const char* one,
+        const char* second) const;
+
+    // -------------------------------------------------------------------
+    /** @brief For backward compatibility
+     *  @see ComparePaths(const char*, const char*)
+     */
+    inline bool ComparePaths (const std::string& one,
+        const std::string& second) const;
+
+    // -------------------------------------------------------------------
+    /** @brief Pushes a new directory onto the directory stack.
+     *  @param path Path to push onto the stack.
+     *  @return True, when push was successful, false if path is empty.
+     */
+    virtual bool PushDirectory( const std::string &path );
+
+    // -------------------------------------------------------------------
+    /** @brief Returns the top directory from the stack.
+     *  @return The directory on the top of the stack.
+     *          Returns empty when no directory was pushed to the stack.
+     */
+    virtual const std::string &CurrentDirectory() const;
+
+    // -------------------------------------------------------------------
+    /** @brief Returns the number of directories stored on the stack.
+     *  @return The number of directories of the stack.
+     */
+    virtual size_t StackSize() const;
+
+    // -------------------------------------------------------------------
+    /** @brief Pops the top directory from the stack.
+     *  @return True, when a directory was on the stack. False if no
+     *          directory was on the stack.
+     */
+    virtual bool PopDirectory();
+
+    // -------------------------------------------------------------------
+    /** @brief CReates an new directory at the given path.
+     *  @param  path    [in] The path to create.
+     *  @return True, when a directory was created. False if the directory
+     *           cannot be created.
+     */
+    virtual bool CreateDirectory( const std::string &path );
+
+    // -------------------------------------------------------------------
+    /** @brief Will change the current directory to the given path.
+     *  @param path     [in] The path to change to.
+     *  @return True, when the directory has changed successfully.
+     */
+    virtual bool ChangeDirectory( const std::string &path );
+
+    virtual bool DeleteFile( const std::string &file );
+
+private:
+    std::vector<std::string> m_pathStack;
+};
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+IOSystem::IOSystem() AI_NO_EXCEPT
+: m_pathStack() {
+    // empty
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+IOSystem::~IOSystem() {
+    // empty
+}
+
+// ----------------------------------------------------------------------------
+// For compatibility, the interface of some functions taking a std::string was
+// changed to const char* to avoid crashes between binary incompatible STL
+// versions. This code her is inlined,  so it shouldn't cause any problems.
+// ----------------------------------------------------------------------------
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+IOStream* IOSystem::Open(const std::string& pFile, const std::string& pMode) {
+    // NOTE:
+    // For compatibility, interface was changed to const char* to
+    // avoid crashes between binary incompatible STL versions
+    return Open(pFile.c_str(),pMode.c_str());
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::Exists( const std::string& pFile) const {
+    // NOTE:
+    // For compatibility, interface was changed to const char* to
+    // avoid crashes between binary incompatible STL versions
+    return Exists(pFile.c_str());
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::ComparePaths (const std::string& one, const std::string& second) const {
+    // NOTE:
+    // For compatibility, interface was changed to const char* to
+    // avoid crashes between binary incompatible STL versions
+    return ComparePaths(one.c_str(),second.c_str());
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::PushDirectory( const std::string &path ) {
+    if ( path.empty() ) {
+        return false;
+    }
+
+    m_pathStack.push_back( path );
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+const std::string &IOSystem::CurrentDirectory() const {
+    if ( m_pathStack.empty() ) {
+        static const std::string Dummy("");
+        return Dummy;
+    }
+    return m_pathStack[ m_pathStack.size()-1 ];
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+size_t IOSystem::StackSize() const {
+    return m_pathStack.size();
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::PopDirectory() {
+    if ( m_pathStack.empty() ) {
+        return false;
+    }
+
+    m_pathStack.pop_back();
+
+    return true;
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::CreateDirectory( const std::string &path ) {
+    if ( path.empty() ) {
+        return false;
+    }
+
+#ifdef _WIN32
+    return 0 != ::_mkdir( path.c_str() );
+#else
+    return 0 != ::mkdir( path.c_str(), 0777 );
+#endif // _WIN32
+}
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::ChangeDirectory( const std::string &path ) {
+    if ( path.empty() ) {
+        return false;
+    }
+
+#ifdef _WIN32
+    return 0 != ::_chdir( path.c_str() );
+#else
+    return 0 != ::chdir( path.c_str() );
+#endif // _WIN32
+}
+
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE
+bool IOSystem::DeleteFile( const std::string &file ) {
+    if ( file.empty() ) {
+        return false;
+    }
+    const int retCode( ::remove( file.c_str() ) );
+    return ( 0 == retCode );
+}
+} //!ns Assimp
+
+#endif //AI_IOSYSTEM_H_INC
--- a/dependencies/assimp/include/assimp/Importer.hpp
+++ b/dependencies/assimp/include/assimp/Importer.hpp
@ -0,0 +1,659 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file  Importer.hpp
+ *  @brief Defines the C++-API to the Open Asset Import Library.
+ */
+#pragma once
+#ifndef AI_ASSIMP_HPP_INC
+#define AI_ASSIMP_HPP_INC
+
+#ifndef __cplusplus
+#   error This header requires C++ to be used. Use assimp.h for plain C.
+#endif // __cplusplus
+
+// Public ASSIMP data structures
+#include <assimp/types.h>
+
+namespace Assimp    {
+    // =======================================================================
+    // Public interface to Assimp
+    class Importer;
+    class IOStream;
+    class IOSystem;
+    class ProgressHandler;
+
+    // =======================================================================
+    // Plugin development
+    //
+    // Include the following headers for the declarations:
+    // BaseImporter.h
+    // BaseProcess.h
+    class BaseImporter;
+    class BaseProcess;
+    class SharedPostProcessInfo;
+    class BatchLoader;
+
+    // =======================================================================
+    // Holy stuff, only for members of the high council of the Jedi.
+    class ImporterPimpl;
+} //! namespace Assimp
+
+#define AI_PROPERTY_WAS_NOT_EXISTING 0xffffffff
+
+struct aiScene;
+
+// importerdesc.h
+struct aiImporterDesc;
+
+/** @namespace Assimp Assimp's CPP-API and all internal APIs */
+namespace Assimp    {
+
+// ----------------------------------------------------------------------------------
+/** CPP-API: The Importer class forms an C++ interface to the functionality of the
+*   Open Asset Import Library.
+*
+* Create an object of this class and call ReadFile() to import a file.
+* If the import succeeds, the function returns a pointer to the imported data.
+* The data remains property of the object, it is intended to be accessed
+* read-only. The imported data will be destroyed along with the Importer
+* object. If the import fails, ReadFile() returns a NULL pointer. In this
+* case you can retrieve a human-readable error description be calling
+* GetErrorString(). You can call ReadFile() multiple times with a single Importer
+* instance. Actually, constructing Importer objects involves quite many
+* allocations and may take some time, so it's better to reuse them as often as
+* possible.
+*
+* If you need the Importer to do custom file handling to access the files,
+* implement IOSystem and IOStream and supply an instance of your custom
+* IOSystem implementation by calling SetIOHandler() before calling ReadFile().
+* If you do not assign a custion IO handler, a default handler using the
+* standard C++ IO logic will be used.
+*
+* @note One Importer instance is not thread-safe. If you use multiple
+* threads for loading, each thread should maintain its own Importer instance.
+*/
+class ASSIMP_API Importer   {
+public:
+    /**
+     *  @brief The upper limit for hints.
+     */
+    static const unsigned int MaxLenHint = 200;
+
+public:
+
+    // -------------------------------------------------------------------
+    /** Constructor. Creates an empty importer object.
+     *
+     * Call ReadFile() to start the import process. The configuration
+     * property table is initially empty.
+     */
+    Importer();
+
+    // -------------------------------------------------------------------
+    /** Copy constructor.
+     *
+     * This copies the configuration properties of another Importer.
+     * If this Importer owns a scene it won't be copied.
+     * Call ReadFile() to start the import process.
+     */
+    Importer(const Importer& other)=delete;
+
+    // -------------------------------------------------------------------
+    /** Assignment operator has been deleted
+     */
+    Importer &operator=(const Importer &) = delete;
+
+    // -------------------------------------------------------------------
+    /** Destructor. The object kept ownership of the imported data,
+     * which now will be destroyed along with the object.
+     */
+    ~Importer();
+
+
+    // -------------------------------------------------------------------
+    /** Registers a new loader.
+     *
+     * @param pImp Importer to be added. The Importer instance takes
+     *   ownership of the pointer, so it will be automatically deleted
+     *   with the Importer instance.
+     * @return AI_SUCCESS if the loader has been added. The registration
+     *   fails if there is already a loader for a specific file extension.
+     */
+    aiReturn RegisterLoader(BaseImporter* pImp);
+
+    // -------------------------------------------------------------------
+    /** Unregisters a loader.
+     *
+     * @param pImp Importer to be unregistered.
+     * @return AI_SUCCESS if the loader has been removed. The function
+     *   fails if the loader is currently in use (this could happen
+     *   if the #Importer instance is used by more than one thread) or
+     *   if it has not yet been registered.
+     */
+    aiReturn UnregisterLoader(BaseImporter* pImp);
+
+    // -------------------------------------------------------------------
+    /** Registers a new post-process step.
+     *
+     * At the moment, there's a small limitation: new post processing
+     * steps are added to end of the list, or in other words, executed
+     * last, after all built-in steps.
+     * @param pImp Post-process step to be added. The Importer instance
+     *   takes ownership of the pointer, so it will be automatically
+     *   deleted with the Importer instance.
+     * @return AI_SUCCESS if the step has been added correctly.
+     */
+    aiReturn RegisterPPStep(BaseProcess* pImp);
+
+    // -------------------------------------------------------------------
+    /** Unregisters a post-process step.
+     *
+     * @param pImp Step to be unregistered.
+     * @return AI_SUCCESS if the step has been removed. The function
+     *   fails if the step is currently in use (this could happen
+     *   if the #Importer instance is used by more than one thread) or
+     *   if it has not yet been registered.
+     */
+    aiReturn UnregisterPPStep(BaseProcess* pImp);
+
+    // -------------------------------------------------------------------
+    /** Set an integer configuration property.
+     * @param szName Name of the property. All supported properties
+     *   are defined in the aiConfig.g header (all constants share the
+     *   prefix AI_CONFIG_XXX and are simple strings).
+     * @param iValue New value of the property
+     * @return true if the property was set before. The new value replaces
+     *   the previous value in this case.
+     * @note Property of different types (float, int, string ..) are kept
+     *   on different stacks, so calling SetPropertyInteger() for a
+     *   floating-point property has no effect - the loader will call
+     *   GetPropertyFloat() to read the property, but it won't be there.
+     */
+    bool SetPropertyInteger(const char* szName, int iValue);
+
+    // -------------------------------------------------------------------
+    /** Set a boolean configuration property. Boolean properties
+     *  are stored on the integer stack internally so it's possible
+     *  to set them via #SetPropertyBool and query them with
+     *  #GetPropertyBool and vice versa.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyBool(const char* szName, bool value)    {
+        return SetPropertyInteger(szName,value);
+    }
+
+    // -------------------------------------------------------------------
+    /** Set a floating-point configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyFloat(const char* szName, ai_real fValue);
+
+    // -------------------------------------------------------------------
+    /** Set a string configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyString(const char* szName, const std::string& sValue);
+
+    // -------------------------------------------------------------------
+    /** Set a matrix configuration property.
+     * @see SetPropertyInteger()
+     */
+    bool SetPropertyMatrix(const char* szName, const aiMatrix4x4& sValue);
+
+    // -------------------------------------------------------------------
+    /** Get a configuration property.
+     * @param szName Name of the property. All supported properties
+     *   are defined in the aiConfig.g header (all constants share the
+     *   prefix AI_CONFIG_XXX).
+     * @param iErrorReturn Value that is returned if the property
+     *   is not found.
+     * @return Current value of the property
+     * @note Property of different types (float, int, string ..) are kept
+     *   on different lists, so calling SetPropertyInteger() for a
+     *   floating-point property has no effect - the loader will call
+     *   GetPropertyFloat() to read the property, but it won't be there.
+     */
+    int GetPropertyInteger(const char* szName,
+        int iErrorReturn = 0xffffffff) const;
+
+    // -------------------------------------------------------------------
+    /** Get a boolean configuration property. Boolean properties
+     *  are stored on the integer stack internally so it's possible
+     *  to set them via #SetPropertyBool and query them with
+     *  #GetPropertyBool and vice versa.
+     * @see GetPropertyInteger()
+     */
+    bool GetPropertyBool(const char* szName, bool bErrorReturn = false) const {
+        return GetPropertyInteger(szName,bErrorReturn)!=0;
+    }
+
+    // -------------------------------------------------------------------
+    /** Get a floating-point configuration property
+     * @see GetPropertyInteger()
+     */
+    ai_real GetPropertyFloat(const char* szName,
+        ai_real fErrorReturn = 10e10) const;
+
+    // -------------------------------------------------------------------
+    /** Get a string configuration property
+     *
+     *  The return value remains valid until the property is modified.
+     * @see GetPropertyInteger()
+     */
+    const std::string GetPropertyString(const char* szName,
+        const std::string& sErrorReturn = "") const;
+
+    // -------------------------------------------------------------------
+    /** Get a matrix configuration property
+     *
+     *  The return value remains valid until the property is modified.
+     * @see GetPropertyInteger()
+     */
+    const aiMatrix4x4 GetPropertyMatrix(const char* szName,
+        const aiMatrix4x4& sErrorReturn = aiMatrix4x4()) const;
+
+    // -------------------------------------------------------------------
+    /** Supplies a custom IO handler to the importer to use to open and
+     * access files. If you need the importer to use custom IO logic to
+     * access the files, you need to provide a custom implementation of
+     * IOSystem and IOFile to the importer. Then create an instance of
+     * your custom IOSystem implementation and supply it by this function.
+     *
+     * The Importer takes ownership of the object and will destroy it
+     * afterwards. The previously assigned handler will be deleted.
+     * Pass NULL to take again ownership of your IOSystem and reset Assimp
+     * to use its default implementation.
+     *
+     * @param pIOHandler The IO handler to be used in all file accesses
+     *   of the Importer.
+     */
+    void SetIOHandler( IOSystem* pIOHandler);
+
+    // -------------------------------------------------------------------
+    /** Retrieves the IO handler that is currently set.
+     * You can use #IsDefaultIOHandler() to check whether the returned
+     * interface is the default IO handler provided by ASSIMP. The default
+     * handler is active as long the application doesn't supply its own
+     * custom IO handler via #SetIOHandler().
+     * @return A valid IOSystem interface, never NULL.
+     */
+    IOSystem* GetIOHandler() const;
+
+    // -------------------------------------------------------------------
+    /** Checks whether a default IO handler is active
+     * A default handler is active as long the application doesn't
+     * supply its own custom IO handler via #SetIOHandler().
+     * @return true by default
+     */
+    bool IsDefaultIOHandler() const;
+
+    // -------------------------------------------------------------------
+    /** Supplies a custom progress handler to the importer. This
+     *  interface exposes an #Update() callback, which is called
+     *  more or less periodically (please don't sue us if it
+     *  isn't as periodically as you'd like it to have ...).
+     *  This can be used to implement progress bars and loading
+     *  timeouts.
+     *  @param pHandler Progress callback interface. Pass NULL to
+     *    disable progress reporting.
+     *  @note Progress handlers can be used to abort the loading
+     *    at almost any time.*/
+    void SetProgressHandler ( ProgressHandler* pHandler );
+
+    // -------------------------------------------------------------------
+    /** Retrieves the progress handler that is currently set.
+     * You can use #IsDefaultProgressHandler() to check whether the returned
+     * interface is the default handler provided by ASSIMP. The default
+     * handler is active as long the application doesn't supply its own
+     * custom handler via #SetProgressHandler().
+     * @return A valid ProgressHandler interface, never NULL.
+     */
+    ProgressHandler* GetProgressHandler() const;
+
+    // -------------------------------------------------------------------
+    /** Checks whether a default progress handler is active
+     * A default handler is active as long the application doesn't
+     * supply its own custom progress handler via #SetProgressHandler().
+     * @return true by default
+     */
+    bool IsDefaultProgressHandler() const;
+
+    // -------------------------------------------------------------------
+    /** @brief Check whether a given set of post-processing flags
+     *  is supported.
+     *
+     *  Some flags are mutually exclusive, others are probably
+     *  not available because your excluded them from your
+     *  Assimp builds. Calling this function is recommended if
+     *  you're unsure.
+     *
+     *  @param pFlags Bitwise combination of the aiPostProcess flags.
+     *  @return true if this flag combination is fine.
+     */
+    bool ValidateFlags(unsigned int pFlags) const;
+
+    // -------------------------------------------------------------------
+    /** Reads the given file and returns its contents if successful.
+     *
+     * If the call succeeds, the contents of the file are returned as a
+     * pointer to an aiScene object. The returned data is intended to be
+     * read-only, the importer object keeps ownership of the data and will
+     * destroy it upon destruction. If the import fails, NULL is returned.
+     * A human-readable error description can be retrieved by calling
+     * GetErrorString(). The previous scene will be deleted during this call.
+     * @param pFile Path and filename to the file to be imported.
+     * @param pFlags Optional post processing steps to be executed after
+     *   a successful import. Provide a bitwise combination of the
+     *   #aiPostProcessSteps flags. If you wish to inspect the imported
+     *   scene first in order to fine-tune your post-processing setup,
+     *   consider to use #ApplyPostProcessing().
+     * @return A pointer to the imported data, NULL if the import failed.
+     *   The pointer to the scene remains in possession of the Importer
+     *   instance. Use GetOrphanedScene() to take ownership of it.
+     *
+     * @note Assimp is able to determine the file format of a file
+     * automatically.
+     */
+    const aiScene* ReadFile(
+        const char* pFile,
+        unsigned int pFlags);
+
+    // -------------------------------------------------------------------
+    /** Reads the given file from a memory buffer and returns its
+     *  contents if successful.
+     *
+     * If the call succeeds, the contents of the file are returned as a
+     * pointer to an aiScene object. The returned data is intended to be
+     * read-only, the importer object keeps ownership of the data and will
+     * destroy it upon destruction. If the import fails, NULL is returned.
+     * A human-readable error description can be retrieved by calling
+     * GetErrorString(). The previous scene will be deleted during this call.
+     * Calling this method doesn't affect the active IOSystem.
+     * @param pBuffer Pointer to the file data
+     * @param pLength Length of pBuffer, in bytes
+     * @param pFlags Optional post processing steps to be executed after
+     *   a successful import. Provide a bitwise combination of the
+     *   #aiPostProcessSteps flags. If you wish to inspect the imported
+     *   scene first in order to fine-tune your post-processing setup,
+     *   consider to use #ApplyPostProcessing().
+     * @param pHint An additional hint to the library. If this is a non
+     *   empty string, the library looks for a loader to support
+     *   the file extension specified by pHint and passes the file to
+     *   the first matching loader. If this loader is unable to completely
+     *   the request, the library continues and tries to determine the
+     *   file format on its own, a task that may or may not be successful.
+     *   Check the return value, and you'll know ...
+     * @return A pointer to the imported data, NULL if the import failed.
+     *   The pointer to the scene remains in possession of the Importer
+     *   instance. Use GetOrphanedScene() to take ownership of it.
+     *
+     * @note This is a straightforward way to decode models from memory
+     * buffers, but it doesn't handle model formats that spread their
+     * data across multiple files or even directories. Examples include
+     * OBJ or MD3, which outsource parts of their material info into
+     * external scripts. If you need full functionality, provide
+     * a custom IOSystem to make Assimp find these files and use
+     * the regular ReadFile() API.
+     */
+    const aiScene* ReadFileFromMemory(
+        const void* pBuffer,
+        size_t pLength,
+        unsigned int pFlags,
+        const char* pHint = "");
+
+    // -------------------------------------------------------------------
+    /** Apply post-processing to an already-imported scene.
+     *
+     *  This is strictly equivalent to calling #ReadFile() with the same
+     *  flags. However, you can use this separate function to inspect
+     *  the imported scene first to fine-tune your post-processing setup.
+     *  @param pFlags Provide a bitwise combination of the
+     *   #aiPostProcessSteps flags.
+     *  @return A pointer to the post-processed data. This is still the
+     *   same as the pointer returned by #ReadFile(). However, if
+     *   post-processing fails, the scene could now be NULL.
+     *   That's quite a rare case, post processing steps are not really
+     *   designed to 'fail'. To be exact, the #aiProcess_ValidateDS
+     *   flag is currently the only post processing step which can actually
+     *   cause the scene to be reset to NULL.
+     *
+     *  @note The method does nothing if no scene is currently bound
+     *    to the #Importer instance.  */
+    const aiScene* ApplyPostProcessing(unsigned int pFlags);
+
+    const aiScene* ApplyCustomizedPostProcessing( BaseProcess *rootProcess, bool requestValidation );
+
+    // -------------------------------------------------------------------
+    /** @brief Reads the given file and returns its contents if successful.
+     *
+     * This function is provided for backward compatibility.
+     * See the const char* version for detailed docs.
+     * @see ReadFile(const char*, pFlags)  */
+    const aiScene* ReadFile(
+        const std::string& pFile,
+        unsigned int pFlags);
+
+    // -------------------------------------------------------------------
+    /** Frees the current scene.
+     *
+     *  The function does nothing if no scene has previously been
+     *  read via ReadFile(). FreeScene() is called automatically by the
+     *  destructor and ReadFile() itself.  */
+    void FreeScene( );
+
+    // -------------------------------------------------------------------
+    /** Returns an error description of an error that occurred in ReadFile().
+     *
+     * Returns an empty string if no error occurred.
+     * @return A description of the last error, an empty string if no
+     *   error occurred. The string is never NULL.
+     *
+     * @note The returned function remains valid until one of the
+     * following methods is called: #ReadFile(), #FreeScene(). */
+    const char* GetErrorString() const;
+
+    // -------------------------------------------------------------------
+    /** Returns the scene loaded by the last successful call to ReadFile()
+     *
+     * @return Current scene or NULL if there is currently no scene loaded */
+    const aiScene* GetScene() const;
+
+    // -------------------------------------------------------------------
+    /** Returns the scene loaded by the last successful call to ReadFile()
+     *  and releases the scene from the ownership of the Importer
+     *  instance. The application is now responsible for deleting the
+     *  scene. Any further calls to GetScene() or GetOrphanedScene()
+     *  will return NULL - until a new scene has been loaded via ReadFile().
+     *
+     * @return Current scene or NULL if there is currently no scene loaded
+     * @note Use this method with maximal caution, and only if you have to.
+     *   By design, aiScene's are exclusively maintained, allocated and
+     *   deallocated by Assimp and no one else. The reasoning behind this
+     *   is the golden rule that deallocations should always be done
+     *   by the module that did the original allocation because heaps
+     *   are not necessarily shared. GetOrphanedScene() enforces you
+     *   to delete the returned scene by yourself, but this will only
+     *   be fine if and only if you're using the same heap as assimp.
+     *   On Windows, it's typically fine provided everything is linked
+     *   against the multithreaded-dll version of the runtime library.
+     *   It will work as well for static linkage with Assimp.*/
+    aiScene* GetOrphanedScene();
+
+    // -------------------------------------------------------------------
+    /** Returns whether a given file extension is supported by ASSIMP.
+     *
+     * @param szExtension Extension to be checked.
+     *   Must include a trailing dot '.'. Example: ".3ds", ".md3".
+     *   Cases-insensitive.
+     * @return true if the extension is supported, false otherwise */
+    bool IsExtensionSupported(const char* szExtension) const;
+
+    // -------------------------------------------------------------------
+    /** @brief Returns whether a given file extension is supported by ASSIMP.
+     *
+     * This function is provided for backward compatibility.
+     * See the const char* version for detailed and up-to-date docs.
+     * @see IsExtensionSupported(const char*) */
+    inline bool IsExtensionSupported(const std::string& szExtension) const;
+
+    // -------------------------------------------------------------------
+    /** Get a full list of all file extensions supported by ASSIMP.
+     *
+     * If a file extension is contained in the list this does of course not
+     * mean that ASSIMP is able to load all files with this extension ---
+     * it simply means there is an importer loaded which claims to handle
+     * files with this file extension.
+     * @param szOut String to receive the extension list.
+     *   Format of the list: "*.3ds;*.obj;*.dae". This is useful for
+     *   use with the WinAPI call GetOpenFileName(Ex). */
+    void GetExtensionList(aiString& szOut) const;
+
+    // -------------------------------------------------------------------
+    /** @brief Get a full list of all file extensions supported by ASSIMP.
+     *
+     * This function is provided for backward compatibility.
+     * See the aiString version for detailed and up-to-date docs.
+     * @see GetExtensionList(aiString&)*/
+    inline void GetExtensionList(std::string& szOut) const;
+
+    // -------------------------------------------------------------------
+    /** Get the number of importers currently registered with Assimp. */
+    size_t GetImporterCount() const;
+
+    // -------------------------------------------------------------------
+    /** Get meta data for the importer corresponding to a specific index..
+    *
+    *  For the declaration of #aiImporterDesc, include <assimp/importerdesc.h>.
+    *  @param index Index to query, must be within [0,GetImporterCount())
+    *  @return Importer meta data structure, NULL if the index does not
+    *     exist or if the importer doesn't offer meta information (
+    *     importers may do this at the cost of being hated by their peers).*/
+    const aiImporterDesc* GetImporterInfo(size_t index) const;
+
+    // -------------------------------------------------------------------
+    /** Find the importer corresponding to a specific index.
+    *
+    *  @param index Index to query, must be within [0,GetImporterCount())
+    *  @return Importer instance. NULL if the index does not
+    *     exist. */
+    BaseImporter* GetImporter(size_t index) const;
+
+    // -------------------------------------------------------------------
+    /** Find the importer corresponding to a specific file extension.
+    *
+    *  This is quite similar to #IsExtensionSupported except a
+    *  BaseImporter instance is returned.
+    *  @param szExtension Extension to check for. The following formats
+    *    are recognized (BAH being the file extension): "BAH" (comparison
+    *    is case-insensitive), ".bah", "*.bah" (wild card and dot
+    *    characters at the beginning of the extension are skipped).
+    *  @return NULL if no importer is found*/
+    BaseImporter* GetImporter (const char* szExtension) const;
+
+    // -------------------------------------------------------------------
+    /** Find the importer index corresponding to a specific file extension.
+    *
+    *  @param szExtension Extension to check for. The following formats
+    *    are recognized (BAH being the file extension): "BAH" (comparison
+    *    is case-insensitive), ".bah", "*.bah" (wild card and dot
+    *    characters at the beginning of the extension are skipped).
+    *  @return (size_t)-1 if no importer is found */
+    size_t GetImporterIndex (const char* szExtension) const;
+
+    // -------------------------------------------------------------------
+    /** Returns the storage allocated by ASSIMP to hold the scene data
+     * in memory.
+     *
+     * This refers to the currently loaded file, see #ReadFile().
+     * @param in Data structure to be filled.
+     * @note The returned memory statistics refer to the actual
+     *   size of the use data of the aiScene. Heap-related overhead
+     *   is (naturally) not included.*/
+    void GetMemoryRequirements(aiMemoryInfo& in) const;
+
+    // -------------------------------------------------------------------
+    /** Enables "extra verbose" mode.
+     *
+     * 'Extra verbose' means the data structure is validated after *every*
+     * single post processing step to make sure everyone modifies the data
+     * structure in a well-defined manner. This is a debug feature and not
+     * intended for use in production environments. */
+    void SetExtraVerbose(bool bDo);
+
+    // -------------------------------------------------------------------
+    /** Private, do not use. */
+    ImporterPimpl* Pimpl() { return pimpl; }
+    const ImporterPimpl* Pimpl() const { return pimpl; }
+
+protected:
+
+    // Just because we don't want you to know how we're hacking around.
+    ImporterPimpl* pimpl;
+}; //! class Importer
+
+
+// ----------------------------------------------------------------------------
+// For compatibility, the interface of some functions taking a std::string was
+// changed to const char* to avoid crashes between binary incompatible STL
+// versions. This code her is inlined,  so it shouldn't cause any problems.
+// ----------------------------------------------------------------------------
+
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE const aiScene* Importer::ReadFile( const std::string& pFile,unsigned int pFlags){
+    return ReadFile(pFile.c_str(),pFlags);
+}
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE void Importer::GetExtensionList(std::string& szOut) const   {
+    aiString s;
+    GetExtensionList(s);
+    szOut = s.data;
+}
+// ----------------------------------------------------------------------------
+AI_FORCE_INLINE bool Importer::IsExtensionSupported(const std::string& szExtension) const   {
+    return IsExtensionSupported(szExtension.c_str());
+}
+
+} // !namespace Assimp
+
+#endif // AI_ASSIMP_HPP_INC
--- a/dependencies/assimp/include/assimp/LineSplitter.h
+++ b/dependencies/assimp/include/assimp/LineSplitter.h
@ -0,0 +1,285 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  LineSplitter.h
+ *  @brief LineSplitter, a helper class to iterate through all lines
+ *    of a file easily. Works with StreamReader.
+ */
+#pragma once
+#ifndef INCLUDED_LINE_SPLITTER_H
+#define INCLUDED_LINE_SPLITTER_H
+
+#include <stdexcept>
+#include "StreamReader.h"
+#include "ParsingUtils.h"
+
+namespace Assimp {
+
+// ------------------------------------------------------------------------------------------------
+/** Usage:
+@code
+for(LineSplitter splitter(stream);splitter;++splitter) {
+
+    if (*splitter == "hi!") {
+       ...
+    }
+    else if (splitter->substr(0,5) == "hello") {
+       ...
+       // access the third token in the line (tokens are space-separated)
+       if (strtol(splitter[2]) > 5) { .. }
+    }
+
+    std::cout << "Current line is: " << splitter.get_index() << std::endl;
+}
+@endcode
+*/
+// ------------------------------------------------------------------------------------------------
+class LineSplitter {
+public:
+    typedef size_t line_idx;
+
+    // -----------------------------------------
+    /** construct from existing stream reader
+    note: trim is *always* assumed true if skyp_empty_lines==true
+    */
+    LineSplitter(StreamReaderLE& stream, bool skip_empty_lines = true, bool trim = true);
+
+    ~LineSplitter();
+
+    // -----------------------------------------
+    /** pseudo-iterator increment */
+    LineSplitter& operator++();
+
+    // -----------------------------------------
+    LineSplitter& operator++(int);
+
+    // -----------------------------------------
+    /** get a pointer to the beginning of a particular token */
+    const char* operator[] (size_t idx) const;
+
+    // -----------------------------------------
+    /** extract the start positions of N tokens from the current line*/
+    template <size_t N>
+    void get_tokens(const char* (&tokens)[N]) const;
+
+    // -----------------------------------------
+    /** member access */
+    const std::string* operator -> () const;
+
+    std::string operator* () const;
+
+    // -----------------------------------------
+    /** boolean context */
+    operator bool() const;
+
+    // -----------------------------------------
+    /** line indices are zero-based, empty lines are included */
+    operator line_idx() const;
+
+    line_idx get_index() const;
+
+    // -----------------------------------------
+    /** access the underlying stream object */
+    StreamReaderLE& get_stream();
+
+    // -----------------------------------------
+    /** !strcmp((*this)->substr(0,strlen(check)),check) */
+    bool match_start(const char* check);
+
+    // -----------------------------------------
+    /** swallow the next call to ++, return the previous value. */
+    void swallow_next_increment();
+
+    LineSplitter( const LineSplitter & ) = delete;
+    LineSplitter(LineSplitter &&) = delete;
+    LineSplitter &operator = ( const LineSplitter & ) = delete;
+
+private:
+    line_idx mIdx;
+    std::string mCur;
+    StreamReaderLE& mStream;
+    bool mSwallow, mSkip_empty_lines, mTrim;
+};
+
+inline
+LineSplitter::LineSplitter(StreamReaderLE& stream, bool skip_empty_lines, bool trim )
+: mIdx(0)
+, mCur()
+, mStream(stream)
+, mSwallow()
+, mSkip_empty_lines(skip_empty_lines)
+, mTrim(trim) {
+    mCur.reserve(1024);
+    operator++();
+    mIdx = 0;
+}
+
+inline
+LineSplitter::~LineSplitter() {
+    // empty
+}
+
+inline
+LineSplitter& LineSplitter::operator++() {
+    if (mSwallow) {
+        mSwallow = false;
+        return *this;
+    }
+
+    if (!*this) {
+        throw std::logic_error("End of file, no more lines to be retrieved.");
+    }
+
+    char s;
+    mCur.clear();
+    while (mStream.GetRemainingSize() && (s = mStream.GetI1(), 1)) {
+        if (s == '\n' || s == '\r') {
+            if (mSkip_empty_lines) {
+                while (mStream.GetRemainingSize() && ((s = mStream.GetI1()) == ' ' || s == '\r' || s == '\n'));
+                if (mStream.GetRemainingSize()) {
+                    mStream.IncPtr(-1);
+                }
+            } else {
+                // skip both potential line terminators but don't read past this line.
+                if (mStream.GetRemainingSize() && (s == '\r' && mStream.GetI1() != '\n')) {
+                    mStream.IncPtr(-1);
+                }
+                if (mTrim) {
+                    while (mStream.GetRemainingSize() && ((s = mStream.GetI1()) == ' ' || s == '\t'));
+                    if (mStream.GetRemainingSize()) {
+                        mStream.IncPtr(-1);
+                    }
+                }
+            }
+            break;
+        }
+        mCur += s;
+    }
+    ++mIdx;
+
+    return *this;
+}
+
+inline
+LineSplitter &LineSplitter::operator++(int) {
+    return ++(*this);
+}
+
+inline
+const char *LineSplitter::operator[] (size_t idx) const {
+    const char* s = operator->()->c_str();
+
+    SkipSpaces(&s);
+    for (size_t i = 0; i < idx; ++i) {
+
+        for (; !IsSpace(*s); ++s) {
+            if (IsLineEnd(*s)) {
+                throw std::range_error("Token index out of range, EOL reached");
+            }
+        }
+        SkipSpaces(&s);
+    }
+    return s;
+}
+
+template <size_t N>
+inline
+void LineSplitter::get_tokens(const char* (&tokens)[N]) const {
+    const char* s = operator->()->c_str();
+
+    SkipSpaces(&s);
+    for (size_t i = 0; i < N; ++i) {
+        if (IsLineEnd(*s)) {
+            throw std::range_error("Token count out of range, EOL reached");
+        }
+        tokens[i] = s;
+
+        for (; *s && !IsSpace(*s); ++s);
+        SkipSpaces(&s);
+    }
+}
+
+inline
+const std::string* LineSplitter::operator -> () const {
+    return &mCur;
+}
+
+inline
+std::string LineSplitter::operator* () const {
+    return mCur;
+}
+
+inline
+LineSplitter::operator bool() const {
+    return mStream.GetRemainingSize() > 0;
+}
+
+inline
+LineSplitter::operator line_idx() const {
+    return mIdx;
+}
+
+inline
+LineSplitter::line_idx LineSplitter::get_index() const {
+    return mIdx;
+}
+
+inline
+StreamReaderLE &LineSplitter::get_stream() {
+    return mStream;
+}
+
+inline
+bool LineSplitter::match_start(const char* check) {
+    const size_t len = ::strlen(check);
+
+    return len <= mCur.length() && std::equal(check, check + len, mCur.begin());
+}
+
+inline
+void LineSplitter::swallow_next_increment() {
+    mSwallow = true;
+}
+
+} // Namespace Assimp
+
+#endif // INCLUDED_LINE_SPLITTER_H
--- a/dependencies/assimp/include/assimp/LogAux.h
+++ b/dependencies/assimp/include/assimp/LogAux.h
@ -0,0 +1,131 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file  LogAux.h
+ *  @brief Common logging usage patterns for importer implementations
+ */
+#ifndef INCLUDED_AI_LOGAUX_H
+#define INCLUDED_AI_LOGAUX_H
+
+#include <assimp/TinyFormatter.h>
+#include <assimp/Exceptional.h>
+#include <assimp/DefaultLogger.hpp>
+
+namespace Assimp {
+
+template<class TDeriving>
+class LogFunctions {
+public:
+    // ------------------------------------------------------------------------------------------------
+    static void ThrowException(const std::string& msg)
+    {
+        throw DeadlyImportError(Prefix()+msg);
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogWarn(const Formatter::format& message)   {
+        if (!DefaultLogger::isNullLogger()) {
+            ASSIMP_LOG_WARN(Prefix()+(std::string)message);
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogError(const Formatter::format& message)  {
+        if (!DefaultLogger::isNullLogger()) {
+            ASSIMP_LOG_ERROR(Prefix()+(std::string)message);
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogInfo(const Formatter::format& message)   {
+        if (!DefaultLogger::isNullLogger()) {
+            ASSIMP_LOG_INFO(Prefix()+(std::string)message);
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogDebug(const Formatter::format& message)  {
+        if (!DefaultLogger::isNullLogger()) {
+            ASSIMP_LOG_DEBUG(Prefix()+(std::string)message);
+        }
+    }
+
+    // https://sourceforge.net/tracker/?func=detail&atid=1067632&aid=3358562&group_id=226462
+#if !defined(__GNUC__) || !defined(__APPLE__) || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogWarn  (const char* message) {
+        if (!DefaultLogger::isNullLogger()) {
+            LogWarn(Formatter::format(message));
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogError  (const char* message) {
+        if (!DefaultLogger::isNullLogger()) {
+            LogError(Formatter::format(message));
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogInfo  (const char* message) {
+        if (!DefaultLogger::isNullLogger()) {
+            LogInfo(Formatter::format(message));
+        }
+    }
+
+    // ------------------------------------------------------------------------------------------------
+    static void LogDebug  (const char* message) {
+        if (!DefaultLogger::isNullLogger()) {
+            LogDebug(Formatter::format(message));
+        }
+    }
+
+#endif
+
+private:
+    static const char* Prefix();
+
+};
+} // ! Assimp
+
+#endif
--- a/dependencies/assimp/include/assimp/LogStream.hpp
+++ b/dependencies/assimp/include/assimp/LogStream.hpp
@ -0,0 +1,111 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file LogStream.hpp
+ *  @brief Abstract base class 'LogStream', representing an output log stream.
+ */
+#ifndef INCLUDED_AI_LOGSTREAM_H
+#define INCLUDED_AI_LOGSTREAM_H
+
+#include "types.h"
+
+namespace Assimp    {
+
+class IOSystem;
+
+// ------------------------------------------------------------------------------------
+/** @brief CPP-API: Abstract interface for log stream implementations.
+ *
+ *  Several default implementations are provided, see #aiDefaultLogStream for more
+ *  details. Writing your own implementation of LogStream is just necessary if these
+ *  are not enough for your purpose. */
+class ASSIMP_API LogStream
+#ifndef SWIG
+    : public Intern::AllocateFromAssimpHeap
+#endif
+{
+protected:
+    /** @brief  Default constructor */
+    LogStream() AI_NO_EXCEPT;
+
+public:
+    /** @brief  Virtual destructor  */
+    virtual ~LogStream();
+
+    // -------------------------------------------------------------------
+    /** @brief  Overwrite this for your own output methods
+     *
+     *  Log messages *may* consist of multiple lines and you shouldn't
+     *  expect a consistent formatting. If you want custom formatting
+     *  (e.g. generate HTML), supply a custom instance of Logger to
+     *  #DefaultLogger:set(). Usually you can *expect* that a log message
+     *  is exactly one line and terminated with a single \n character.
+     *  @param message Message to be written */
+    virtual void write(const char* message) = 0;
+
+    // -------------------------------------------------------------------
+    /** @brief Creates a default log stream
+     *  @param streams Type of the default stream
+     *  @param name For aiDefaultLogStream_FILE: name of the output file
+     *  @param io For aiDefaultLogStream_FILE: IOSystem to be used to open the output
+     *   file. Pass NULL for the default implementation.
+     *  @return New LogStream instance.  */
+    static LogStream* createDefaultStream(aiDefaultLogStream stream,
+        const char* name = "AssimpLog.txt",
+        IOSystem* io = nullptr );
+
+}; // !class LogStream
+
+inline
+LogStream::LogStream() AI_NO_EXCEPT {
+    // empty
+}
+
+inline
+LogStream::~LogStream() {
+    // empty
+}
+
+// ------------------------------------------------------------------------------------
+} // Namespace Assimp
+
+#endif
--- a/dependencies/assimp/include/assimp/Logger.hpp
+++ b/dependencies/assimp/include/assimp/Logger.hpp
@ -0,0 +1,305 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file Logger.hpp
+ *  @brief Abstract base class 'Logger', base of the logging system.
+ */
+#ifndef INCLUDED_AI_LOGGER_H
+#define INCLUDED_AI_LOGGER_H
+
+#include <assimp/types.h>
+#include <assimp/TinyFormatter.h>
+
+namespace Assimp {
+
+class LogStream;
+
+// Maximum length of a log message. Longer messages are rejected.
+#define MAX_LOG_MESSAGE_LENGTH 1024u
+
+// ----------------------------------------------------------------------------------
+/** @brief CPP-API: Abstract interface for logger implementations.
+ *  Assimp provides a default implementation and uses it for almost all
+ *  logging stuff ('DefaultLogger'). This class defines just basic logging
+ *  behavior and is not of interest for you. Instead, take a look at #DefaultLogger. */
+class ASSIMP_API Logger
+#ifndef SWIG
+    : public Intern::AllocateFromAssimpHeap
+#endif
+{
+public:
+
+    // ----------------------------------------------------------------------
+    /** @enum   LogSeverity
+     *  @brief  Log severity to describe the granularity of logging.
+     */
+    enum LogSeverity {
+        NORMAL,     //!< Normal granularity of logging
+        VERBOSE     //!< Debug infos will be logged, too
+    };
+
+    // ----------------------------------------------------------------------
+    /** @enum   ErrorSeverity
+     *  @brief  Description for severity of a log message.
+     *
+     *  Every LogStream has a bitwise combination of these flags.
+     *  A LogStream doesn't receive any messages of a specific type
+     *  if it doesn't specify the corresponding ErrorSeverity flag.
+     */
+    enum ErrorSeverity {
+        Debugging   = 1,    //!< Debug log message
+        Info        = 2,    //!< Info log message
+        Warn        = 4,    //!< Warn log message
+        Err         = 8     //!< Error log message
+    };
+
+public:
+
+    /** @brief  Virtual destructor */
+    virtual ~Logger();
+
+    // ----------------------------------------------------------------------
+    /** @brief  Writes a debug message
+     *   @param message Debug message*/
+    void debug(const char* message);
+    void debug(const std::string &message);
+
+    // ----------------------------------------------------------------------
+    /** @brief  Writes a info message
+     *  @param  message Info message*/
+    void info(const char* message);
+    void info(const std::string &message);
+
+    // ----------------------------------------------------------------------
+    /** @brief  Writes a warning message
+     *  @param  message Warn message*/
+    void warn(const char* message);
+    void warn(const std::string &message);
+
+    // ----------------------------------------------------------------------
+    /** @brief  Writes an error message
+     *  @param  message Error message*/
+    void error(const char* message);
+    void error(const std::string &message);
+
+    // ----------------------------------------------------------------------
+    /** @brief  Set a new log severity.
+     *  @param  log_severity New severity for logging*/
+    void setLogSeverity(LogSeverity log_severity);
+
+    // ----------------------------------------------------------------------
+    /** @brief Get the current log severity*/
+    LogSeverity getLogSeverity() const;
+
+    // ----------------------------------------------------------------------
+    /** @brief  Attach a new log-stream
+     *
+     *  The logger takes ownership of the stream and is responsible
+     *  for its destruction (which is done using ::delete when the logger
+     *  itself is destroyed). Call detachStream to detach a stream and to
+     *  gain ownership of it again.
+     *   @param pStream  Log-stream to attach
+     *  @param severity  Message filter, specified which types of log
+     *    messages are dispatched to the stream. Provide a bitwise
+     *    combination of the ErrorSeverity flags.
+     *  @return true if the stream has been attached, false otherwise.*/
+    virtual bool attachStream(LogStream *pStream,
+        unsigned int severity = Debugging | Err | Warn | Info) = 0;
+
+    // ----------------------------------------------------------------------
+    /** @brief  Detach a still attached stream from the logger (or
+     *          modify the filter flags bits)
+     *   @param pStream Log-stream instance for detaching
+     *  @param severity Provide a bitwise combination of the ErrorSeverity
+     *    flags. This value is &~ed with the current flags of the stream,
+     *    if the result is 0 the stream is detached from the Logger and
+     *    the caller retakes the possession of the stream.
+     *  @return true if the stream has been detached, false otherwise.*/
+    virtual bool detatchStream(LogStream *pStream,
+        unsigned int severity = Debugging | Err | Warn | Info) = 0;
+
+protected:
+    /**
+     *  Default constructor
+     */
+    Logger() AI_NO_EXCEPT;
+
+    /**
+     *  Construction with a given log severity
+     */
+    explicit Logger(LogSeverity severity);
+
+    // ----------------------------------------------------------------------
+    /**
+     *  @brief Called as a request to write a specific debug message
+     *  @param  message Debug message. Never longer than
+     *    MAX_LOG_MESSAGE_LENGTH characters (excluding the '0').
+     *  @note  The message string is only valid until the scope of
+     *    the function is left.
+     */
+    virtual void OnDebug(const char* message)= 0;
+
+    // ----------------------------------------------------------------------
+    /**
+     *  @brief Called as a request to write a specific info message
+     *  @param  message Info message. Never longer than
+     *    MAX_LOG_MESSAGE_LENGTH characters (ecxluding the '0').
+     *  @note  The message string is only valid until the scope of
+     *    the function is left.
+     */
+    virtual void OnInfo(const char* message) = 0;
+
+    // ----------------------------------------------------------------------
+    /**
+     *  @brief Called as a request to write a specific warn message
+     *  @param  message Warn message. Never longer than
+     *    MAX_LOG_MESSAGE_LENGTH characters (exluding the '0').
+     *  @note  The message string is only valid until the scope of
+     *    the function is left.
+     */
+    virtual void OnWarn(const char* essage) = 0;
+
+    // ----------------------------------------------------------------------
+    /**
+     *  @brief Called as a request to write a specific error message
+     *  @param  message Error message. Never longer than
+     *    MAX_LOG_MESSAGE_LENGTH characters (exluding the '0').
+     *  @note  The message string is only valid until the scope of
+     *    the function is left.
+     */
+    virtual void OnError(const char* message) = 0;
+
+protected:
+    LogSeverity m_Severity;
+};
+
+// ----------------------------------------------------------------------------------
+//  Default constructor
+inline
+Logger::Logger() AI_NO_EXCEPT
+: m_Severity(NORMAL) {
+    // empty
+}
+
+// ----------------------------------------------------------------------------------
+//  Virtual destructor
+inline
+Logger::~Logger() {
+    // empty
+}
+
+// ----------------------------------------------------------------------------------
+// Construction with given logging severity
+inline
+Logger::Logger(LogSeverity severity)
+: m_Severity(severity) {
+    // empty
+}
+
+// ----------------------------------------------------------------------------------
+// Log severity setter
+inline
+void Logger::setLogSeverity(LogSeverity log_severity){
+    m_Severity = log_severity;
+}
+
+// ----------------------------------------------------------------------------------
+// Log severity getter
+inline
+Logger::LogSeverity Logger::getLogSeverity() const {
+    return m_Severity;
+}
+
+// ----------------------------------------------------------------------------------
+inline
+void Logger::debug(const std::string &message) {
+    return debug(message.c_str());
+}
+
+// ----------------------------------------------------------------------------------
+inline
+void Logger::error(const std::string &message) {
+    return error(message.c_str());
+}
+
+// ----------------------------------------------------------------------------------
+inline
+void Logger::warn(const std::string &message) {
+    return warn(message.c_str());
+}
+
+// ----------------------------------------------------------------------------------
+inline
+void Logger::info(const std::string &message) {
+    return info(message.c_str());
+}
+
+// ------------------------------------------------------------------------------------------------
+#define ASSIMP_LOG_WARN_F(string,...)\
+    DefaultLogger::get()->warn((Formatter::format(string),__VA_ARGS__))
+
+#define ASSIMP_LOG_ERROR_F(string,...)\
+    DefaultLogger::get()->error((Formatter::format(string),__VA_ARGS__))
+
+#define ASSIMP_LOG_DEBUG_F(string,...)\
+    DefaultLogger::get()->debug((Formatter::format(string),__VA_ARGS__))
+
+#define ASSIMP_LOG_INFO_F(string,...)\
+    DefaultLogger::get()->info((Formatter::format(string),__VA_ARGS__))
+
+
+#define ASSIMP_LOG_WARN(string)\
+    DefaultLogger::get()->warn(string)
+
+#define ASSIMP_LOG_ERROR(string)\
+    DefaultLogger::get()->error(string)
+
+#define ASSIMP_LOG_DEBUG(string)\
+    DefaultLogger::get()->debug(string)
+
+#define ASSIMP_LOG_INFO(string)\
+    DefaultLogger::get()->info(string)
+
+
+} // Namespace Assimp
+
+#endif // !! INCLUDED_AI_LOGGER_H
--- a/dependencies/assimp/include/assimp/Macros.h
+++ b/dependencies/assimp/include/assimp/Macros.h
@ -0,0 +1,49 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/* Helper macro to set a pointer to NULL in debug builds
+ */
+#if (defined ASSIMP_BUILD_DEBUG)
+#   define AI_DEBUG_INVALIDATE_PTR(x) x = NULL;
+#else
+#   define AI_DEBUG_INVALIDATE_PTR(x)
+#endif
+
--- a/dependencies/assimp/include/assimp/MathFunctions.h
+++ b/dependencies/assimp/include/assimp/MathFunctions.h
@ -0,0 +1,86 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2016, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+#pragma once
+
+/** @file  MathFunctions.h
+*  @brief Implementation of math utility functions.
+ *
+*/
+
+#include <limits>
+
+namespace Assimp {
+namespace Math {
+
+// TODO: use binary GCD for unsigned integers ....
+template < typename IntegerType >
+inline
+IntegerType gcd( IntegerType a, IntegerType b ) {
+	const IntegerType zero = (IntegerType)0;
+	while ( true ) {
+		if ( a == zero )
+			return b;
+		b %= a;
+
+		if ( b == zero )
+			return a;
+		a %= b;
+	}
+}
+
+template < typename IntegerType >
+inline
+IntegerType lcm( IntegerType a, IntegerType b ) {
+	const IntegerType t = gcd (a,b);
+	if (!t)
+        return t;
+	return a / t * b;
+}
+
+template<class T>
+inline
+T getEpsilon() {
+    return std::numeric_limits<T>::epsilon();
+}
+
+}
+}
--- a/dependencies/assimp/include/assimp/MemoryIOWrapper.h
+++ b/dependencies/assimp/include/assimp/MemoryIOWrapper.h
@ -0,0 +1,244 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+
+/** @file MemoryIOWrapper.h
+ *  Handy IOStream/IOSystem implemetation to read directly from a memory buffer */
+#ifndef AI_MEMORYIOSTREAM_H_INC
+#define AI_MEMORYIOSTREAM_H_INC
+
+#include <assimp/IOStream.hpp>
+#include <assimp/IOSystem.hpp>
+#include <assimp/ai_assert.h>
+#include <stdint.h>
+
+namespace Assimp    {
+    
+#define AI_MEMORYIO_MAGIC_FILENAME "$$$___magic___$$$"
+#define AI_MEMORYIO_MAGIC_FILENAME_LENGTH 17
+
+// ----------------------------------------------------------------------------------
+/** Implementation of IOStream to read directly from a memory buffer */
+// ----------------------------------------------------------------------------------
+class MemoryIOStream : public IOStream {
+public:
+    MemoryIOStream (const uint8_t* buff, size_t len, bool own = false)
+    : buffer (buff)
+    , length(len)
+    , pos((size_t)0)
+    , own(own) {
+        // empty
+    }
+
+    ~MemoryIOStream ()  {
+        if(own) {
+            delete[] buffer;
+        }
+    }
+
+    // -------------------------------------------------------------------
+    // Read from stream
+    size_t Read(void* pvBuffer, size_t pSize, size_t pCount)    {
+        ai_assert(nullptr != pvBuffer);
+        ai_assert(0 != pSize);
+        
+        const size_t cnt = std::min( pCount, (length-pos) / pSize);
+        const size_t ofs = pSize * cnt;
+
+        ::memcpy(pvBuffer,buffer+pos,ofs);
+        pos += ofs;
+
+        return cnt;
+    }
+
+    // -------------------------------------------------------------------
+    // Write to stream
+    size_t Write(const void* /*pvBuffer*/, size_t /*pSize*/,size_t /*pCount*/)  {
+        ai_assert(false); // won't be needed
+        return 0;
+    }
+
+    // -------------------------------------------------------------------
+    // Seek specific position
+    aiReturn Seek(size_t pOffset, aiOrigin pOrigin) {
+        if (aiOrigin_SET == pOrigin) {
+            if (pOffset > length) {
+                return AI_FAILURE;
+            }
+            pos = pOffset;
+        } else if (aiOrigin_END == pOrigin) {
+            if (pOffset > length) {
+                return AI_FAILURE;
+            }
+            pos = length-pOffset;
+        } else {
+            if (pOffset+pos > length) {
+                return AI_FAILURE;
+            }
+            pos += pOffset;
+        }
+        return AI_SUCCESS;
+    }
+
+    // -------------------------------------------------------------------
+    // Get current seek position
+    size_t Tell() const {
+        return pos;
+    }
+
+    // -------------------------------------------------------------------
+    // Get size of file
+    size_t FileSize() const {
+        return length;
+    }
+
+    // -------------------------------------------------------------------
+    // Flush file contents
+    void Flush() {
+        ai_assert(false); // won't be needed
+    }
+
+private:
+    const uint8_t* buffer;
+    size_t length,pos;
+    bool own;
+};
+
+// ---------------------------------------------------------------------------
+/** Dummy IO system to read from a memory buffer */
+class MemoryIOSystem : public IOSystem {
+public:
+    /** Constructor. */
+    MemoryIOSystem(const uint8_t* buff, size_t len, IOSystem* io)
+    : buffer(buff)
+    , length(len)
+    , existing_io(io)
+    , created_streams() {
+        // empty
+    }
+
+    /** Destructor. */
+    ~MemoryIOSystem() {
+    }
+
+    // -------------------------------------------------------------------
+    /** Tests for the existence of a file at the given path. */
+    bool Exists(const char* pFile) const override {
+        if (0 == strncmp( pFile, AI_MEMORYIO_MAGIC_FILENAME, AI_MEMORYIO_MAGIC_FILENAME_LENGTH ) ) {
+            return true;
+        }
+        return existing_io ? existing_io->Exists(pFile) : false;
+    }
+
+    // -------------------------------------------------------------------
+    /** Returns the directory separator. */
+    char getOsSeparator() const override {
+        return existing_io ? existing_io->getOsSeparator()
+                           : '/';  // why not? it doesn't care
+    }
+
+    // -------------------------------------------------------------------
+    /** Open a new file with a given path. */
+    IOStream* Open(const char* pFile, const char* pMode = "rb") override {
+        if ( 0 == strncmp( pFile, AI_MEMORYIO_MAGIC_FILENAME, AI_MEMORYIO_MAGIC_FILENAME_LENGTH ) ) {
+            created_streams.emplace_back(new MemoryIOStream(buffer, length));
+            return created_streams.back();
+        }
+        return existing_io ? existing_io->Open(pFile, pMode) : NULL;
+    }
+
+    // -------------------------------------------------------------------
+    /** Closes the given file and releases all resources associated with it. */
+    void Close( IOStream* pFile) override {
+        auto it = std::find(created_streams.begin(), created_streams.end(), pFile);
+        if (it != created_streams.end()) {
+            delete pFile;
+            created_streams.erase(it);
+        } else if (existing_io) {
+            existing_io->Close(pFile);
+        }
+    }
+
+    // -------------------------------------------------------------------
+    /** Compare two paths */
+    bool ComparePaths(const char* one, const char* second) const override {
+        return existing_io ? existing_io->ComparePaths(one, second) : false;
+    }
+
+    bool PushDirectory( const std::string &path ) override { 
+        return existing_io ? existing_io->PushDirectory(path) : false;
+    }
+
+    const std::string &CurrentDirectory() const override {
+        static std::string empty;
+        return existing_io ? existing_io->CurrentDirectory() : empty;
+    }
+
+    size_t StackSize() const override {
+        return existing_io ? existing_io->StackSize() : 0;
+    }
+
+    bool PopDirectory() override {
+        return existing_io ? existing_io->PopDirectory() : false;
+    }
+
+    bool CreateDirectory( const std::string &path ) override {
+        return existing_io ? existing_io->CreateDirectory(path) : false;
+    }
+
+    bool ChangeDirectory( const std::string &path ) override {
+        return existing_io ? existing_io->ChangeDirectory(path) : false;
+    }
+
+    bool DeleteFile( const std::string &file ) override {
+        return existing_io ? existing_io->DeleteFile(file) : false;
+    }
+
+private:
+    const uint8_t* buffer;
+    size_t length;
+    IOSystem* existing_io;
+    std::vector<IOStream*> created_streams;
+};
+
+} // end namespace Assimp
+
+#endif
--- a/Show More
+++ b/Show More