Implemented simple fog.

Shader/phong.fsh

@@ -20,6 +20,8 @@ uniform float directionalIntensity;
 uniform vec3 lightSources[128];
 uniform vec3 lightColors[128];
 uniform float lightIntensities[128];
+uniform float fogStart;
+uniform vec3 fogColor;
 
 void main()
 {   
@@ -48,7 +50,11 @@ void main()
             *specularFactor*intensity*lightColors[i];
         }
     }
+
     vec3 finalColor = specularColor + diffuseColor + ambientColor;
+    float distanceCamera = distance(camera, vec3(fragPosition));
+    float fogFactor = clamp((1.0 - exp(-distanceCamera+fogStart)), 0.0, 1.0);
+    finalColor = mix(finalColor, fogColor, fogFactor);
 
     vec4 texture = texture(uTexture, vTexCoord).rgba;
     oColor = vec4(finalColor, 1.0f)*texture;

graphics.cc

@@ -139,9 +139,13 @@ void Graphics::render(Level* level, ACGL::OpenGL::SharedShaderProgram shader)
             level->getDirectionalLight()->getIntensity());
     }
 
+    // set fog Parameters
+    shader->setUniform("fogStart", farPlane-50.0f);
+    shader->setUniform("fogColor", level->getFogColor());
+
     // set Material Parameters
     shader->setUniform("ambientColor", level->getAmbientLight());
-    shader->setUniform("camera", glm::vec3(0.0f, 0.0f, 0.0f));
+    shader->setUniform("camera", level->getCameraPosition());
 
     // render the level(currently only a bunny):
     level->render();

level.cc

@@ -54,6 +54,7 @@ void Level::load(ACGL::OpenGL::SharedShaderProgram shader) {
 
     //set lighting parameters
     ambientLight = glm::vec3(1.0f, 1.0f, 1.0f);
+    fogColor = glm::vec3(0.10f, 0.14f, 0.14f);
     directionalLight = Light(glm::vec3(-0.5f, 0.0f, -0.5f), glm::vec3(1.0f, 1.0f, 0.0f), 0.4f);
     Light light = Light(glm::vec3(-3.0f, 7.0f, 0.0f), glm::vec3(1.0f, 1.0f, 1.0f), 5.0f);
     lights.push_back(light);
@@ -134,6 +135,10 @@ Light* Level::getDirectionalLight() {
     return &directionalLight;
 }
 
+glm::vec3 Level::getFogColor() {
+    return fogColor;
+}
+
 glm::vec3 Level::getCameraPosition() {
    return cameraCenter->getPosition() + camera.getVector();
 }

level.hh

@@ -24,11 +24,13 @@ class Level {
         Object* getCameraCenter();
         Camera* getCamera();
         glm::vec3 getCameraPosition();
+        glm::vec3 getFogColor();
     private:
         std::string filePath;
         std::vector<Object> objects;
         std::vector<Light> lights;
         glm::vec3 ambientLight;
+        glm::vec3 fogColor;
         Light directionalLight;
         Object* cameraCenter;
         Physics physics;