noise shader

grk/cw 6/shaders/shader_noise.frag

@@ -0,0 +1,80 @@
+#version 430 core
+
+float PI = 3.14159f;
+
+uniform sampler2D colorTexture;
+
+uniform float exposition;
+
+in vec3 vecNormal;
+in vec3 worldPos;
+in vec2 vtc;
+
+out vec4 outColor;
+
+in vec3 viewDirTS;
+in vec3 lightDirTS;
+in vec3 sunDirTS;
+
+uniform float u_time;
+float pi = 3.14159;
+// 2D Random
+float random (in vec2 st) {
+    return fract(sin(dot(st.xy,
+                         vec2(12.9898,78.233)))
+                 * 43758.5453123);
+}
+
+// 2D Noise based on Morgan McGuire @morgan3d
+// https://www.shadertoy.com/view/4dS3Wd
+float noise (in vec2 st) {
+    vec2 i = floor(st);
+    vec2 f = fract(st);
+
+    // Four corners in 2D of a tile
+    float a = random(i);
+    float b = random(i + vec2(1.0, 0.0));
+    float c = random(i + vec2(0.0, 1.0));
+    float d = random(i + vec2(1.0, 1.0));
+    
+    vec2 randA = vec2(a *2.0 *pi);
+    vec2 randB = vec2(b *2.0 *pi);
+    vec2 randC = vec2(c *2.0 *pi);
+    vec2 randD = vec2(d *2.0 *pi);
+    
+    vec2 offsetA = a-st;
+    vec2 offsetB = b-st;
+    vec2 offsetC = c-st;
+    vec2 offsetD = d-st;
+    
+    offsetA = offsetA*randA;
+    offsetB = offsetB*randB;
+    offsetC = offsetC*randC;
+    offsetD = offsetD*randD;
+    
+    float resA = smoothstep(offsetA.x,offsetA.y, f.y);
+    float resB = smoothstep(offsetB.x,offsetB.y, f.y);
+    float resC = smoothstep(offsetC.x,offsetC.y, f.y);
+    float resD = smoothstep(offsetD.x,offsetD.y, f.y);
+
+	vec2 u = smoothstep(0.,1.,f);
+
+
+    float ab= mix(a, b, u.x);
+    float cd = mix(c, d, u.x);
+    return mix(ab,cd,u.y);
+  
+}
+
+void main()
+{
+
+    vec2 st = vtc;
+    vec2 pos = vec2(st*3.776);
+
+    // Use the noise function
+    float n = 1.836 * 0.676*noise(pos*2.576);
+    n = smoothstep(-0.096, 1.176, n);
+
+	outColor = vec4(vec3(n), 1);
+}

grk/cw 6/shaders/shader_smap.frag

@@ -1,6 +1,80 @@
 #version 430 core
 
+float PI = 3.14159f;
+
+uniform sampler2D colorTexture;
+
+uniform float exposition;
+
+in vec3 vecNormal;
+in vec3 worldPos;
+in vec2 vtc;
+
+out vec4 outColor;
+
+in vec3 viewDirTS;
+in vec3 lightDirTS;
+in vec3 sunDirTS;
+
+uniform float u_time;
+float pi = 3.14159;
+// 2D Random
+float random (in vec2 st) {
+    return fract(sin(dot(st.xy,
+                         vec2(12.9898,78.233)))
+                 * 43758.5453123);
+}
+
+// 2D Noise based on Morgan McGuire @morgan3d
+// https://www.shadertoy.com/view/4dS3Wd
+float noise (in vec2 st) {
+    vec2 i = floor(st);
+    vec2 f = fract(st);
+
+    // Four corners in 2D of a tile
+    float a = random(i);
+    float b = random(i + vec2(1.0, 0.0));
+    float c = random(i + vec2(0.0, 1.0));
+    float d = random(i + vec2(1.0, 1.0));
+    
+    vec2 randA = vec2(a *2.0 *pi);
+    vec2 randB = vec2(b *2.0 *pi);
+    vec2 randC = vec2(c *2.0 *pi);
+    vec2 randD = vec2(d *2.0 *pi);
+    
+    vec2 offsetA = a-st;
+    vec2 offsetB = b-st;
+    vec2 offsetC = c-st;
+    vec2 offsetD = d-st;
+    
+    offsetA = offsetA*randA;
+    offsetB = offsetB*randB;
+    offsetC = offsetC*randC;
+    offsetD = offsetD*randD;
+    
+    float resA = smoothstep(offsetA.x,offsetA.y, f.y);
+    float resB = smoothstep(offsetB.x,offsetB.y, f.y);
+    float resC = smoothstep(offsetC.x,offsetC.y, f.y);
+    float resD = smoothstep(offsetD.x,offsetD.y, f.y);
+
+	vec2 u = smoothstep(0.,1.,f);
+
+
+    float ab= mix(a, b, u.x);
+    float cd = mix(c, d, u.x);
+    return mix(ab,cd,u.y);
+  
+}
+
 void main()
 {
 
+    vec2 st = vtc;
+    vec2 pos = vec2(st*3.776);
+
+    // Use the noise function
+    float n = 1.836 * 0.676*noise(pos*2.576);
+    n = smoothstep(-0.096, 1.176, n);
+
+	outColor = vec4(vec3(n), 1);
 }

grk/cw 6/src/Planet.hpp

@@ -62,6 +62,7 @@ GLuint programTex;
 GLuint programPbr;
 GLuint programSun;
 GLuint programSkyBox;
+GLuint programNoise;
 
 Core::Shader_Loader shaderLoader;
 
@@ -256,6 +257,18 @@ void drawObjectPBR(Core::RenderContext& context, glm::mat4 modelMatrix, GLuint t
 	glUseProgram(0);
 }
 
+void drawObjectNoise(Core::RenderContext& context, glm::mat4 modelMatrix, GLuint texture, float roughness, float metallic) {
+	glUseProgram(programNoise);
+	glm::mat4 viewProjectionMatrix = createPerspectiveMatrix() * createCameraMatrix();
+	glm::mat4 transformation = viewProjectionMatrix * modelMatrix;
+	glUniformMatrix4fv(glGetUniformLocation(programNoise, "transformation"), 1, GL_FALSE, (float*)&transformation);
+	glUniformMatrix4fv(glGetUniformLocation(programNoise, "modelMatrix"), 1, GL_FALSE, (float*)&modelMatrix);
+
+	Core::DrawContext(context);
+	glUseProgram(0);
+}
+
+
 void renderScene(GLFWwindow* window) {
 	glClearColor(0.5f, 0.0f, 0.25f, 1.0f);
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -268,6 +281,7 @@ void renderScene(GLFWwindow* window) {
 
 	//drawPlanet(sphereContext, planetTranslate * planetRotate * planetScale, planetTex);
 	drawObjectPBR(sphereContext, planetTranslate * planetRotate * planetScale, planetTex, planetRough, planetMetal);
+	drawObjectNoise(sphereContext, planetTranslate * planetRotate * planetScale, planetTex, planetRough, planetMetal);
 
 	//rysowanie słońca
 	glm::mat4 sunScale = glm::scale(glm::vec3(sunSize));
@@ -316,6 +330,7 @@ void init(GLFWwindow* window) {
 	programPbr = shaderLoader.CreateProgram("shaders/shader_pbr.vert", "shaders/shader_pbr.frag");
 	programSun = shaderLoader.CreateProgram("shaders/shader_sun.vert", "shaders/shader_sun.frag");
 	programSkyBox = shaderLoader.CreateProgram("shaders/shader_skybox.vert", "shaders/shader_skybox.frag");
+	programNoise = shaderLoader.CreateProgram("shaders/shader_pbr.vert", "shaders/shader_smap.frag");
 
 	loadModelToContext("./models/sphere.obj", sphereContext);
 	loadModelToContext("./models/cube.obj", cubeContext);