grk/cw 6/shaders/shader_pbr.frag

@@ -23,6 +23,7 @@ uniform float u_time;
 uniform float cloudLight;
 uniform float cloudIntensity; 
 uniform float cloudSpeed; 
+uniform float cloudLightness; 
 
 in vec3 vecNormal;
 in vec3 worldPos;
@@ -183,6 +184,7 @@ void main() {
     if (atmosphereCheck)
         textureColor = mix(textureColor, vec4(atmosphereColor / atmosphereDot, 1.0), 0.1);
 
+    float diffuse = max(0, dot(normal, lightDir));
     vec3 distance = lightColor / pow(length(lightPos - worldPos), 2.0) * 10;
     vec3 toneMappedColor = toneMapping(vec3(textureColor) * distance);
     //gamma correction
@@ -198,7 +200,7 @@ void main() {
 
     vec3 pbrColor = vec3(1.0) - exp(-illumination * exposition);
 
-    vec4 noiseColor = noiseColor() * min(1, AMBIENT + diffuse) * vec4(lightColor, 0.0) / cloudLight;
+    vec4 noiseColor = noiseColor() * min(1, AMBIENT + cloudLightness * diffuse) * vec4(lightColor, 0.0) / cloudLight;
 
     vec3 mixedColor = mix(pbrColor.rgb, noiseColor.rgb, noiseColor.r);
 

grk/cw 6/shaders/shader_tex.frag

@@ -1,6 +1,7 @@
 #version 430 core
 
 float AMBIENT = 0.05;
+float PI = 3.14159;
 
 uniform sampler2D colorTexture;
 
@@ -12,6 +13,12 @@ uniform vec3 cameraPos;
 
 uniform bool atmosphereCheck;
 
+uniform float u_time;
+uniform float cloudLight;
+uniform float cloudIntensity; 
+uniform float cloudSpeed; 
+uniform float cloudLightness; 
+
 in vec3 vecNormal;
 in vec3 worldPos;
 in vec2 vtc;
@@ -25,6 +32,68 @@ vec3 toneMapping(vec3 color)
 	return mapped;
 }
 
+float random (in vec2 st) {
+    return fract(sin(dot(st.xy,
+                         vec2(12.9898,78.233)))*
+        43758.5453123);
+}
+
+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 u = f * f * (3.0 - 2.0 * f);
+
+    return mix(a, b, u.x) +
+            (c - a)* u.y * (1.0 - u.x) +
+            (d - b) * u.x * u.y;
+}
+
+#define OCTAVES 6
+float fbm (in vec2 st) {
+    // Initial values
+    float value = 0.0;
+    float amplitude = .5;
+    float frequency = 0.;
+    //
+    // Loop of octaves
+    for (int i = 0; i < OCTAVES; i++) {
+        value += amplitude * noise(st);
+        st *= 2.;
+        amplitude *= .5;
+    }
+    return value;
+}
+
+vec4 noiseColor() {
+    vec2 st = vtc.xy;
+    vec2 mirroredSt = vec2(1.0 - st.x, st.y);
+    
+    float timeOffset = u_time * cloudSpeed;
+    st.x -= timeOffset;
+    mirroredSt.x += timeOffset; // Inverse direction for mirrored effect
+
+    st.x = fract(st.x);
+    mirroredSt.x = fract(mirroredSt.x);
+
+    vec3 color = vec3(fbm(st * cloudIntensity));
+    vec3 mirroredColor = vec3(fbm(mirroredSt * cloudIntensity));
+
+    float blend = smoothstep(0.45, 0.55, st.x); 
+
+    vec3 finalColor = mix(color, mirroredColor, blend);
+
+    vec4 noiseColor = vec4(finalColor, 1.0);
+
+    return noiseColor;
+}
+
 void main()
 {
 	vec3 normal = normalize(vecNormal);
@@ -46,5 +115,9 @@ void main()
     //gamma correction
     //toneMappedColor = pow(toneMappedColor, vec3(1.0/2.2)); 
 
-	outColor = vec4(toneMappedColor, 1);
+    vec4 noiseColor = noiseColor() * min(1, AMBIENT + cloudLightness) * vec4(lightColor, 0.0) / cloudLight;
+
+    vec3 mixedColor = mix(toneMappedColor.rgb, noiseColor.rgb, noiseColor.r);
+
+    outColor = vec4(mixedColor, 1.0);
 }

grk/cw 6/src/Planet.hpp

@@ -77,6 +77,7 @@ glm::vec3 lightColor = glm::vec3(lightPower, lightPower, lightPower);
 float cloudLight = 20.f;
 float cloudIntensity = 15.f;
 float cloudSpeed = 0.07f;
+float cloudLightness = 30.f;
 
 glm::mat4 createCameraMatrix() {
 	glm::vec3 cameraSide = glm::normalize(glm::cross(cameraDir, glm::vec3(0.f, 1.f, 0.f)));
@@ -167,9 +168,15 @@ void drawPlanetTex(Core::RenderContext& context, glm::mat4 modelMatrix, GLuint t
 	glUniform3f(glGetUniformLocation(programTex, "lightPos"), sunPos.x, sunPos.y, sunPos.z);
 	glUniform3f(glGetUniformLocation(programTex, "lightColor"), lightColor.x, lightColor.y, lightColor.z);
 
-	glUniform3f(glGetUniformLocation(programPbr, "cameraPos"), cameraPos.x, cameraPos.y, cameraPos.z);
+	glUniform3f(glGetUniformLocation(programTex, "cameraPos"), cameraPos.x, cameraPos.y, cameraPos.z);
 
-	glUniform1i(glGetUniformLocation(programPbr, "atmosphereCheck"), atmosphereCheck);
+	float time = glfwGetTime();
+	glUniform1f(glGetUniformLocation(programTex, "u_time"), time);
+	glUniform1f(glGetUniformLocation(programTex, "cloudLight"), cloudLight);
+	glUniform1f(glGetUniformLocation(programTex, "cloudIntensity"), cloudIntensity);
+	glUniform1f(glGetUniformLocation(programTex, "cloudSpeed"), cloudSpeed);
+	glUniform1f(glGetUniformLocation(programTex, "cloudLightness"), cloudLightness);
+	glUniform1i(glGetUniformLocation(programTex, "atmosphereCheck"), atmosphereCheck);
 
 	Core::DrawContext(context);
 	glUseProgram(0);
@@ -200,6 +207,7 @@ void drawPlanetPbr(Core::RenderContext& context, glm::mat4 modelMatrix, GLuint t
 	glUniform1f(glGetUniformLocation(programPbr, "cloudLight"), cloudLight);
 	glUniform1f(glGetUniformLocation(programPbr, "cloudIntensity"), cloudIntensity);
 	glUniform1f(glGetUniformLocation(programPbr, "cloudSpeed"), cloudSpeed);
+	glUniform1f(glGetUniformLocation(programPbr, "cloudLightness"), cloudLightness);
 
 	glUniform1i(glGetUniformLocation(programPbr, "atmosphereCheck"), atmosphereCheck);
 
@@ -218,9 +226,9 @@ void drawSun(Core::RenderContext& context, glm::mat4 modelMatrix, GLuint texture
 	glUniform3f(glGetUniformLocation(programSun, "lightPos"), sunPos.x, sunPos.y, sunPos.z);
 	glUniform3f(glGetUniformLocation(programSun, "lightColor"), lightColor.x, lightColor.y, lightColor.z);
 
-	glUniform3f(glGetUniformLocation(programPbr, "cameraPos"), cameraPos.x, cameraPos.y, cameraPos.z);
+	glUniform3f(glGetUniformLocation(programSun, "cameraPos"), cameraPos.x, cameraPos.y, cameraPos.z);
 
-	glUniform1i(glGetUniformLocation(programPbr, "atmosphereCheck"), atmosphereCheck);
+	glUniform1i(glGetUniformLocation(programSun, "atmosphereCheck"), atmosphereCheck);
 
 	Core::DrawContext(context);
 	glUseProgram(0);