Add fog to shader

cw 6/shaders/shader_color.frag

@@ -6,15 +6,29 @@ uniform vec3 cameraPos;
 
 in vec3 interpNormal;
 in vec3 fragPos;
+float near = 0.15f;
+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 = 0.5f, float offset = 5.0f)
+{
+    float zVal = linearizeDepth(depth);
+    return (1 / (1 + exp(-steepness * (zVal - offset))));
+}
 
 void main()
 {
+	float depth = logisticDepth(gl_FragCoord.z);
 	vec3 lightDir = normalize(lightPos-fragPos);
 	vec3 V = normalize(cameraPos-fragPos);
 	vec3 normal = normalize(interpNormal);
 	vec3 R = reflect(-normalize(lightDir),normal);
 	
 	float specular = pow(max(0,dot(R,V)),10);
-	float diffuse = max(0,dot(normal,normalize(lightDir)));
-	gl_FragColor = vec4(mix(objectColor,objectColor*diffuse+vec3(1)*specular,0.9), 1.0);
+	float diffuse = max(0,dot(normal,lightDir));
+	gl_FragColor = vec4(mix(objectColor,objectColor*diffuse+vec3(1)*specular,0.9), 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/shader_tex.frag

@@ -8,8 +8,25 @@ uniform vec3 cameraPos;
 in vec3 interpNormal;
 in vec2 interpTexCoord;
 in vec3 fragPos;
+
+
+float near = 0.15f;
+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 = 0.5f, float offset = 5.0f)
+{
+    float zVal = linearizeDepth(depth);
+    return (1 / (1 + exp(-steepness * (zVal - offset))));
+}
+
 void main()
 {
+	float depth = logisticDepth(gl_FragCoord.z);
 	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 lightDir = normalize(lightPos-fragPos);
@@ -17,7 +34,7 @@ void main()
 	vec3 normal = normalize(interpNormal);
 	vec3 R = reflect(-normalize(lightDir),normal);
 	
-	float specular = pow(max(0,dot(R,V)),10);
+	float specular = pow(max(0,dot(R,V)),100);
 	float diffuse = max(0,dot(normal,normalize(lightDir)));
-	gl_FragColor = vec4(mix(color,color*diffuse+vec3(1)*specular,0.9), 1.0);
+	gl_FragColor = vec4(mix(color,color*diffuse+vec3(1)*specular,0.9), 1.0) * (1.0f - depth) + vec4(depth * vec3(5.0f/255.0f, 35.0f/255.0f, 95.0f/255.0f), 1.0f);
 }