added fog

cw 6/grk-cw6.vcxproj

@@ -39,6 +39,8 @@
     <None Include="shaders\shader_color.vert" />
     <None Include="shaders\shader_tex.frag" />
     <None Include="shaders\shader_tex.vert" />
+    <None Include="shaders\skybox.frag" />
+    <None Include="shaders\skybox.vert" />
   </ItemGroup>
   <PropertyGroup Label="Globals">
     <ProjectGuid>{10701B86-9B0B-46A1-85DA-6238CBCC507B}</ProjectGuid>

cw 6/grk-cw6.vcxproj.filters

@@ -97,5 +97,11 @@
     <None Include="shaders\shader_tex.vert">
       <Filter>Shader Files</Filter>
     </None>
+    <None Include="shaders\skybox.frag">
+      <Filter>Shader Files</Filter>
+    </None>
+    <None Include="shaders\skybox.vert">
+      <Filter>Shader Files</Filter>
+    </None>
   </ItemGroup>
 </Project>

cw 6/shaders/shader_tex.frag

@@ -6,11 +6,27 @@ 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.frag

@@ -6,7 +6,23 @@ in vec3 texCoords;
 
 uniform samplerCube skybox;
 
+float near = 00.01f;
+float far = 10.f;
+
+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);
 }

cw 6/src/main.cpp

@@ -365,12 +365,12 @@ void renderScene()
 	}
 
 	// narysuj teren z pliku terenu
-	drawObjectTexture(terrainContext, glm::translate(glm::vec3(0, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
-	drawObjectTexture(terrainContext, glm::translate(glm::vec3(130, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
-	drawObjectTexture(terrainContext, glm::translate(glm::vec3(-130, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
+	//drawObjectTexture(terrainContext, glm::translate(glm::vec3(0, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
+	//drawObjectTexture(terrainContext, glm::translate(glm::vec3(130, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
+	//drawObjectTexture(terrainContext, glm::translate(glm::vec3(-130, -20, 0)) * glm::rotate(glm::radians(90.0f), glm::vec3(0, 1, 0)) * glm::scale(glm::vec3(1.5f)), textureGround);
 
 	// narysuj p³ask¹ powierzchniê
-	//drawPlaneTexture(planeContext, glm::rotate(glm::radians(120.f), glm::vec3(1.f, 1.f, 1.f)), textureGround);
+	drawPlaneTexture(planeContext, glm::rotate(glm::radians(120.f), glm::vec3(1.f, 1.f, 1.f)), textureGround);
 
 	// rysowanie skyboxa
 	drawObjectSkybox(skyboxContext);
@@ -441,7 +441,7 @@ void init()
 	textureFish = Core::LoadTexture("textures/TropicalFish01.jpg");
 	textureBubble = Core::LoadTexture("textures/bubble.png");
 	textureShip = Core::LoadTexture("textures/txt-subm-1.jpg");
-	textureGround = Core::LoadTexture("textures/terrain.jpg");
+	textureGround = Core::LoadTexture("textures/ground.jpg");
 
 	// SKYBOX
 	// Create VAO, VBO, and EBO for the skybox