init

grafika_projekt/grafika_projekt.vcxproj

@@ -157,6 +157,8 @@
   <ItemGroup>
     <ClInclude Include="src\HeightGenerator.h" />
     <ClInclude Include="src\Camera.h" />
+    <ClInclude Include="src\mesh.h" />
+    <ClInclude Include="src\model.h" />
     <ClInclude Include="src\objload.h" />
     <ClInclude Include="src\Render_Utils.h" />
     <ClInclude Include="src\Shader_Loader.h" />

grafika_projekt/grafika_projekt.vcxproj.filters

@@ -89,6 +89,12 @@
     <ClInclude Include="src\Terrain.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\mesh.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="src\model.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="shaders\skybox.frag" />

grafika_projekt/src/Camera.h

@@ -5,7 +5,7 @@
 
 namespace Core
 {
-	glm::mat4 createPerspectiveMatrix(float zNear = 0.1f, float zFar = 200.0f);
+	glm::mat4 createPerspectiveMatrix(float zNear = 0.1f, float zFar = 500.0f);
 
 	// position - pozycja kamery
 	// forward - wektor "do przodu" kamery (jednostkowy)

grafika_projekt/src/Terrain.cpp

@@ -2,7 +2,7 @@
 
 
 const float Terrain::SIZE = 100.f;
-const int Terrain::VERTEX_COUNT = 32;
+const int Terrain::VERTEX_COUNT = 2;
 const int Terrain::COUNT = Terrain::VERTEX_COUNT * Terrain::VERTEX_COUNT;
 
 
@@ -27,8 +27,8 @@ obj::Model Terrain::generateTerrain() {
 			normals[vertexPointer * 3] = normal.x;
 			normals[vertexPointer * 3 + 1] = normal.y;
 			normals[vertexPointer * 3 + 2] = normal.z;
-			textureCoords[vertexPointer * 2] = float(j) / float(VERTEX_COUNT - 1);
-			textureCoords[vertexPointer * 2 + 1] = float(i) / float(VERTEX_COUNT - 1);
+			textureCoords[vertexPointer * 2] = float(j) / float(VERTEX_COUNT - 1) * 20;
+			textureCoords[vertexPointer * 2 + 1] = float(i) / float(VERTEX_COUNT - 1) * 20;
 			vertexPointer++;
 		}
 	}

grafika_projekt/src/main.cpp

@@ -355,8 +355,8 @@ void renderScene()
 	cameraMatrix = createCameraMatrix();
 	perspectiveMatrix = Core::createPerspectiveMatrix();
 
-	glClearColor(0.219f, 0.407f, 0.658f, 1.0f);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+	glClearColor(0.219f, 0.407f, 0.658f, 1.0f);
 
 	float time = glutGet(GLUT_ELAPSED_TIME) / 1000.f;
 	glUseProgram(skyboxProgram);
@@ -376,13 +376,6 @@ void renderScene()
 	glm::mat4 submarineModelMatrix = glm::translate(cameraPos + cameraDir) * glm::mat4_cast(glm::inverse(rotation)) * submarineInitialTransformation;
 
 
-	///
-
-	drawObjectTexture(terrainContext, glm::translate(glm::vec3(1, 1, 1)), textureTerrain, programTexture);
-
-	///
-
-
 	glm::mat4 bubbleInitialTransformation = glm::translate(glm::vec3(0, -0.5, -0.4)) * glm::rotate(glm::radians(180.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(0.5f));
 	
 	glm::vec3 change1 = glm::vec3(0, 3, 0);
@@ -406,8 +399,9 @@ void renderScene()
 			time -= 6;
 		}
 	}
-	//drawObjectTexture(bubbleContext, submarineInitialTransformation, cubemapTexture, bubbleProgram);
 	drawObjectTexture(submarineContext, submarineModelMatrix, textureSubmarine, programTexture);
+	drawObjectTexture(terrainContext, glm::translate(glm::vec3(1, 1, 1)), textureTerrain, programTexture);
+
 	glutSwapBuffers();
 }
 
@@ -523,7 +517,7 @@ void init()
 
 
 
-	textureTerrain = Core::LoadTexture("textures/terrain.png");
+	textureTerrain = Core::LoadTexture("textures/sand.jpg");
 	terrain = Terrain(0, 0, heightGenerator);
 	obj::Model model = terrain.generateTerrain();
 	terrainContext.initFromOBJ(model);

grafika_projekt/src/mesh.h

@@ -0,0 +1,140 @@
+
+
+#ifndef MESH_H
+#define MESH_H
+
+#include "glew.h"
+#include "freeglut.h"
+#include "glm.hpp"
+#include "ext.hpp"
+#include <iostream>
+#include <cmath>
+
+#include <string>
+#include <vector>
+using namespace std;
+
+struct Vertex {
+    // position
+    glm::vec3 Position;
+    // normal
+    glm::vec3 Normal;
+    // texCoords
+    glm::vec2 TexCoords;
+    // tangent
+    glm::vec3 Tangent;
+    // bitangent
+    glm::vec3 Bitangent;
+};
+
+struct Texture {
+    unsigned int id;
+    string type;
+    string path;
+};
+
+class Mesh {
+public:
+    // mesh Data
+    vector<Vertex>       vertices;
+    vector<unsigned int> indices;
+    vector<Texture>      textures;
+    glm::mat4            matrix;
+    unsigned int VAO;
+
+    // constructor
+    Mesh(vector<Vertex> vertices, vector<unsigned int> indices, vector<Texture> textures,glm::mat4 matrix)
+    {
+        this->vertices = vertices;
+        this->indices = indices;
+        this->textures = textures;
+        this->matrix = matrix;
+
+        // now that we have all the required data, set the vertex buffers and its attribute pointers.
+        setupMesh();
+    }
+
+    // render the mesh
+    void Draw(GLuint program)
+    {
+        // bind appropriate textures
+        unsigned int diffuseNr = 1;
+        unsigned int specularNr = 1;
+        unsigned int normalNr = 1;
+        unsigned int heightNr = 1;
+        for (unsigned int i = 0; i < textures.size(); i++)
+        {
+            glActiveTexture(GL_TEXTURE0 + i); // active proper texture unit before binding
+            // retrieve texture number (the N in diffuse_textureN)
+            string number;
+            string name = textures[i].type;
+            if (name == "texture_diffuse")
+                number = std::to_string(diffuseNr++);
+            else if (name == "texture_specular")
+                number = std::to_string(specularNr++); // transfer unsigned int to stream
+            else if (name == "texture_normal")
+                number = std::to_string(normalNr++); // transfer unsigned int to stream
+            else if (name == "texture_height")
+                number = std::to_string(heightNr++); // transfer unsigned int to stream
+
+            // now set the sampler to the correct texture unit
+            glUniform1i(glGetUniformLocation(program, (name + number).c_str()), i);
+            // and finally bind the texture
+            glBindTexture(GL_TEXTURE_2D, textures[i].id);
+        }
+
+        glUniformMatrix4fv(glGetUniformLocation(program, "model"), 1, GL_FALSE, (float*)&matrix);
+        // draw mesh
+        glBindVertexArray(VAO); 
+        glDrawElements(GL_TRIANGLES, indices.size(), GL_UNSIGNED_INT, 0);
+        glBindVertexArray(0);
+
+        // always good practice to set everything back to defaults once configured.
+        glActiveTexture(GL_TEXTURE0);
+    }
+
+private:
+    // render data 
+    unsigned int VBO, EBO;
+
+    // initializes all the buffer objects/arrays
+    void setupMesh()
+    {
+        // create buffers/arrays
+        glGenVertexArrays(1, &VAO);
+        glGenBuffers(1, &VBO);
+        glGenBuffers(1, &EBO);
+
+        glBindVertexArray(VAO);
+        // load data into vertex buffers
+        glBindBuffer(GL_ARRAY_BUFFER, VBO);
+        // A great thing about structs is that their memory layout is sequential for all its items.
+        // The effect is that we can simply pass a pointer to the struct and it translates perfectly to a glm::vec3/2 array which
+        // again translates to 3/2 floats which translates to a byte array.
+        glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vertex), &vertices[0], GL_STATIC_DRAW);
+
+        glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, indices.size() * sizeof(unsigned int), &indices[0], GL_STATIC_DRAW);
+
+        // set the vertex attribute pointers
+        // vertex Positions
+        glEnableVertexAttribArray(0);
+        glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)0);
+        // vertex normals
+        glEnableVertexAttribArray(1);
+        glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Normal));
+        // vertex texture coords
+        glEnableVertexAttribArray(2);
+        glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, TexCoords));
+        // vertex tangent
+        glEnableVertexAttribArray(3);
+        glVertexAttribPointer(3, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Tangent));
+        // vertex bitangent
+        glEnableVertexAttribArray(4);
+        glVertexAttribPointer(4, 3, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void*)offsetof(Vertex, Bitangent));
+
+        glBindVertexArray(0);
+    }
+};
+#endif
+

grafika_projekt/src/model.h

@@ -0,0 +1,250 @@
+#pragma once
+
+
+
+
+#include "glew.h"
+#include "freeglut.h"
+#include "glm.hpp"
+#include "ext.hpp"
+#include <iostream>
+#include <cmath>
+#include <assimp/Importer.hpp>
+#include <assimp/scene.h>
+#include <assimp/postprocess.h>
+
+#include "stb_image.h"
+#include "mesh.h"
+
+#include <string>
+#include <fstream>
+#include <sstream>
+#include <iostream>
+#include <map>
+#include <vector>
+using namespace std;
+
+
+unsigned int TextureFromFile(const char* path, const string& directory, bool gamma = false);
+
+class Model
+{
+public:
+    // model data 
+    vector<Texture> textures_loaded;	// stores all the textures loaded so far, optimization to make sure textures aren't loaded more than once.
+    vector<Mesh>    meshes;
+    string directory;
+    bool gammaCorrection;
+
+    // constructor, expects a filepath to a 3D model.
+    Model(string const& path, bool gamma = false) : gammaCorrection(gamma)
+    {
+        loadModel(path);
+    }
+
+    // draws the model, and thus all its meshes
+    void Draw(GLuint shader)
+    {
+        for (unsigned int i = 0; i < meshes.size(); i++)
+            meshes[i].Draw(shader);
+    }
+
+private:
+    // loads a model with supported ASSIMP extensions from file and stores the resulting meshes in the meshes vector.
+    void loadModel(string const& path)
+    {
+        // read file via ASSIMP
+        Assimp::Importer importer;
+        const aiScene* scene = importer.ReadFile(path, aiProcess_Triangulate | aiProcess_GenSmoothNormals | aiProcess_FlipUVs | aiProcess_CalcTangentSpace);
+        // check for errors
+        if (!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) // if is Not Zero
+        {
+            cout << "ERROR::ASSIMP:: " << importer.GetErrorString() << endl;
+            return;
+        }
+        // retrieve the directory path of the filepath
+        directory = path.substr(0, path.find_last_of('/'));
+
+        // process ASSIMP's root node recursively
+        processNode(scene->mRootNode, scene,glm::mat4());
+    }
+
+    // processes a node in a recursive fashion. Processes each individual mesh located at the node and repeats this process on its children nodes (if any).
+    void processNode(aiNode* node, const aiScene* scene,glm::mat4 matrix)
+    {
+        glm::mat4 outMatrix = matrix * mat4_cast(node->mTransformation);
+        // process each mesh located at the current node
+        for (unsigned int i = 0; i < node->mNumMeshes; i++)
+        {
+            // the node object only contains indices to index the actual objects in the scene. 
+            // the scene contains all the data, node is just to keep stuff organized (like relations between nodes).
+            aiMesh* mesh = scene->mMeshes[node->mMeshes[i]];
+            meshes.push_back(processMesh(mesh, scene, outMatrix));
+        }
+        // after we've processed all of the meshes (if any) we then recursively process each of the children nodes
+        for (unsigned int i = 0; i < node->mNumChildren; i++)
+        {
+            processNode(node->mChildren[i], scene, outMatrix);
+        }
+
+    }
+
+    Mesh processMesh(aiMesh* mesh, const aiScene* scene, glm::mat4 matrix)
+    {
+        // data to fill
+        vector<Vertex> vertices;
+        vector<unsigned int> indices;
+        vector<Texture> textures;
+
+        // walk through each of the mesh's vertices
+        for (unsigned int i = 0; i < mesh->mNumVertices; i++)
+        {
+            Vertex vertex;
+            glm::vec3 vector; // we declare a placeholder vector since assimp uses its own vector class that doesn't directly convert to glm's vec3 class so we transfer the data to this placeholder glm::vec3 first.
+            // positions
+            vector.x = mesh->mVertices[i].x;
+            vector.y = mesh->mVertices[i].y;
+            vector.z = mesh->mVertices[i].z;
+            vertex.Position = vector;
+            // normals
+            if (mesh->HasNormals())
+            {
+                vector.x = mesh->mNormals[i].x;
+                vector.y = mesh->mNormals[i].y;
+                vector.z = mesh->mNormals[i].z;
+                vertex.Normal = vector;
+            }
+            // texture coordinates
+            if (mesh->mTextureCoords[0]) // does the mesh contain texture coordinates?
+            {
+                glm::vec2 vec;
+                // a vertex can contain up to 8 different texture coordinates. We thus make the assumption that we won't 
+                // use models where a vertex can have multiple texture coordinates so we always take the first set (0).
+                vec.x = mesh->mTextureCoords[0][i].x;
+                vec.y = mesh->mTextureCoords[0][i].y;
+                vertex.TexCoords = vec;
+                // tangent
+                vector.x = mesh->mTangents[i].x;
+                vector.y = mesh->mTangents[i].y;
+                vector.z = mesh->mTangents[i].z;
+                vertex.Tangent = vector;
+                // bitangent
+                vector.x = mesh->mBitangents[i].x;
+                vector.y = mesh->mBitangents[i].y;
+                vector.z = mesh->mBitangents[i].z;
+                vertex.Bitangent = vector;
+            }
+            else
+                vertex.TexCoords = glm::vec2(0.0f, 0.0f);
+
+            vertices.push_back(vertex);
+        }
+        // now wak through each of the mesh's faces (a face is a mesh its triangle) and retrieve the corresponding vertex indices.
+        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]);
+        }
+        // process materials
+        aiMaterial* material = scene->mMaterials[mesh->mMaterialIndex];
+        // we assume a convention for sampler names in the shaders. Each diffuse texture should be named
+        // as 'texture_diffuseN' where N is a sequential number ranging from 1 to MAX_SAMPLER_NUMBER. 
+        // Same applies to other texture as the following list summarizes:
+        // diffuse: texture_diffuseN
+        // specular: texture_specularN
+        // normal: texture_normalN
+
+        // 1. diffuse maps
+        vector<Texture> diffuseMaps = loadMaterialTextures(material, aiTextureType_DIFFUSE, "texture_diffuse");
+        textures.insert(textures.end(), diffuseMaps.begin(), diffuseMaps.end());
+        // 2. specular maps
+        vector<Texture> specularMaps = loadMaterialTextures(material, aiTextureType_SPECULAR, "texture_specular");
+        textures.insert(textures.end(), specularMaps.begin(), specularMaps.end());
+        // 3. normal maps
+        std::vector<Texture> normalMaps = loadMaterialTextures(material, aiTextureType_HEIGHT, "texture_normal");
+        textures.insert(textures.end(), normalMaps.begin(), normalMaps.end());
+        // 4. height maps
+        std::vector<Texture> heightMaps = loadMaterialTextures(material, aiTextureType_AMBIENT, "texture_height");
+        textures.insert(textures.end(), heightMaps.begin(), heightMaps.end());
+
+
+        // return a mesh object created from the extracted mesh data
+        return Mesh(vertices, indices, textures, matrix);
+    }
+
+    // checks all material textures of a given type and loads the textures if they're not loaded yet.
+    // the required info is returned as a Texture struct.
+    vector<Texture> loadMaterialTextures(aiMaterial* mat, aiTextureType type, string typeName)
+    {
+        vector<Texture> textures;
+        for (unsigned int i = 0; i < mat->GetTextureCount(type); i++)
+        {
+            aiString str;
+            mat->GetTexture(type, i, &str);
+            // check if texture was loaded before and if so, continue to next iteration: skip loading a new texture
+            bool skip = false;
+            for (unsigned int j = 0; j < textures_loaded.size(); j++)
+            {
+                if (std::strcmp(textures_loaded[j].path.data(), str.C_Str()) == 0)
+                {
+                    textures.push_back(textures_loaded[j]);
+                    skip = true; // a texture with the same filepath has already been loaded, continue to next one. (optimization)
+                    break;
+                }
+            }
+            if (!skip)
+            {   // if texture hasn't been loaded already, load it
+                Texture texture;
+                texture.id = TextureFromFile(str.C_Str(), this->directory);
+                texture.type = typeName;
+                texture.path = str.C_Str();
+                textures.push_back(texture);
+                textures_loaded.push_back(texture);  // store it as texture loaded for entire model, to ensure we won't unnecesery load duplicate textures.
+            }
+        }
+        return textures;
+    }
+};
+
+
+unsigned int TextureFromFile(const char* path, const string& directory, bool gamma)
+{
+    string filename = string(path);
+    filename = directory + '/' + filename;
+
+    unsigned int textureID;
+    glGenTextures(1, &textureID);
+
+    int width, height, nrComponents;
+    unsigned char* data = stbi_load(filename.c_str(), &width, &height, &nrComponents, 0);
+    if (data)
+    {
+        GLenum format;
+        if (nrComponents == 1)
+            format = GL_RED;
+        else if (nrComponents == 3)
+            format = GL_RGB;
+        else if (nrComponents == 4)
+            format = GL_RGBA;
+
+        glBindTexture(GL_TEXTURE_2D, textureID);
+        glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, GL_UNSIGNED_BYTE, data);
+        glGenerateMipmap(GL_TEXTURE_2D);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+        stbi_image_free(data);
+    }
+    else
+    {
+        std::cout << "Texture failed to load at path: " << path << std::endl;
+        stbi_image_free(data);
+    }
+
+    return textureID;
+}