Added fog

cw 6/shaders/shader_tex.frag

@@ -6,11 +6,28 @@ uniform vec3 lightDir;
 in vec3 interpNormal;
 in vec2 interpTexCoord;
 
+float near = 00.01f;
+float far = 100.0f;
+
+float linearizeDepth(float depth)
+{
+    return (2.0 * near * far) / (far + near - (depth * 2.0 - 1.0) * (far - near));
+}
+
+
+float logisticDepth(float depth, float steepness, float offset)
+{
+    float zVal = linearizeDepth(depth);
+    return (1 / (1 + exp(-steepness * (zVal - offset))));
+}
+
 void main()
 {
 	vec2 modifiedTexCoord = vec2(interpTexCoord.x, 1.0 - interpTexCoord.y); // Poprawka dla tekstur Ziemi, ktore bez tego wyswietlaja sie 'do gory nogami'
 	vec3 color = texture2D(textureSampler, modifiedTexCoord).rgb;
 	vec3 normal = normalize(interpNormal);
 	float diffuse = max(dot(normal, -lightDir), 0.0);
-	gl_FragColor = vec4(color * diffuse, 1.0);
+	float depth = logisticDepth(gl_FragCoord.z, 0.5f, 4.0f);
+
+	gl_FragColor = vec4(color * diffuse, 1.0) * (1.0f - depth) + vec4(depth * vec3(5.0f/255.0f, 35.0f/255.0f, 95.0f/255.0f), 1.0f);
 }

cw 6/shaders/skybox_tex.frag

@@ -1,11 +1,28 @@
 #version 410 core
 out vec4 FragColor;
 
-in vec3 TexCoords;
+
+in vec3 texCoords;
 
 uniform samplerCube skybox;
 
+float near = 00.01f;
+float far = 7f;
+
+float linearizeDepth(float depth)
+{
+    return (2.0 * near * far) / (far + near - (depth * 2.0 - 1.0) * (far - near));
+}
+
+
+float logisticDepth(float depth, float steepness, float offset)
+{
+    float zVal = linearizeDepth(depth);
+    return (1 / (1 + exp(-steepness * (zVal - offset))));
+}
+
 void main()
 {    
-    FragColor = texture(skybox, TexCoords);
+    float depth = logisticDepth(gl_FragCoord.z, 0.5f, 4.0f);
+    FragColor = texture(skybox, texCoords) * (1.0f - depth) + vec4(depth * vec3(5.0f/255.0f, 35.0f/255.0f, 95.0f/255.0f), 1.0f);
 }