Add Skybox Example (#5)

* added skybox example

* use existing resource directory

examples/models/resources/shaders/cubemap.fs

@@ -8,31 +8,31 @@
 
 #version 330
 
-# Input vertex attributes (from vertex shader)
-in vec3 fragPos
+// Input vertex attributes (from vertex shader)
+in vec3 fragPosition;
 
-# Input uniform values
-uniform sampler2D equirectangularMap
+// Input uniform values
+uniform sampler2D equirectangularMap;
 
-# Output fragment color
-out vec4 finalColor
+// Output fragment color
+out vec4 finalColor;
 
 vec2 SampleSphericalMap(vec3 v)
-[
-    vec2 uv = vec2(atan(v.z, v.x), asin(v.y))
-    uv *= vec2(0.1591, 0.3183)
-    uv += 0.5
-    return uv
-]
+{
+    vec2 uv = vec2(atan(v.z, v.x), asin(v.y));
+    uv *= vec2(0.1591, 0.3183);
+    uv += 0.5;
+    return uv;
+}
 
 void main()
-[
-    # Normalize local position
-    vec2 uv = SampleSphericalMap(normalize(fragPos))
+{
+    // Normalize local position 
+    vec2 uv = SampleSphericalMap(normalize(fragPosition));
 
-    # Fetch color from texture map
-    vec3 color = texture(equirectangularMap, uv).rgb
+    // Fetch color from texture map
+    vec3 color = texture(equirectangularMap, uv).rgb;
 
-    # Calculate final fragment color
-    finalColor = vec4(color, 1.0)
-]
+    // Calculate final fragment color
+    finalColor = vec4(color, 1.0);
+}

examples/models/resources/shaders/cubemap.vs

@@ -8,21 +8,21 @@
 
 #version 330
 
-# Input vertex attributes
-in vec3 vertexPosition
+// Input vertex attributes
+in vec3 vertexPosition;
 
-# Input uniform values
-uniform mat4 projection
-uniform mat4 view
+// Input uniform values
+uniform mat4 projection;
+uniform mat4 view;
 
-# Output vertex attributes (to fragment shader)
-out vec3 fragPos
+// Output vertex attributes (to fragment shader)
+out vec3 fragPosition;
 
 void main()
-[
-    # Calculate fragment position based on model transformations
-    fragPos = vertexPosition
+{
+    // Calculate fragment position based on model transformations
+    fragPosition = vertexPosition;
 
-    # Calculate final vertex position
-    gl_Position = projection*view*vec4(vertexPosition, 1.0)
-]
+    // Calculate final vertex position
+    gl_Position = projection*view*vec4(vertexPosition, 1.0);
+}

examples/models/resources/shaders/skybox.fs

@@ -8,24 +8,24 @@
 
 #version 330
 
-# Input vertex attributes (from vertex shader)
-in vec3 fragPos
+// Input vertex attributes (from vertex shader)
+in vec3 fragPosition;
 
-# Input uniform values
-uniform samplerCube environmentMap
+// Input uniform values
+uniform samplerCube environmentMap;
 
-# Output fragment color
-out vec4 finalColor
+// Output fragment color
+out vec4 finalColor;
 
 void main()
-[
-    # Fetch color from texture map
-    vec3 color = texture(environmentMap, fragPos).rgb
+{
+    // Fetch color from texture map
+    vec3 color = texture(environmentMap, fragPosition).rgb;
 
-    # Apply gamma correction
-    color = color/(color + vec3(1.0))
-    color = pow(color, vec3(1.0/2.2))
+    // Apply gamma correction
+    color = color/(color + vec3(1.0));
+    color = pow(color, vec3(1.0/2.2));
 
-    # Calculate final fragment color
-    finalColor = vec4(color, 1.0)
-]
+    // Calculate final fragment color
+    finalColor = vec4(color, 1.0);
+}

examples/models/resources/shaders/skybox.vs

@@ -8,25 +8,25 @@
 
 #version 330
 
-# Input vertex attributes
-in vec3 vertexPosition
+// Input vertex attributes
+in vec3 vertexPosition;
 
-# Input uniform values
-uniform mat4 projection
-uniform mat4 view
+// Input uniform values
+uniform mat4 projection;
+uniform mat4 view;
 
-# Output vertex attributes (to fragment shader)
-out vec3 fragPos
+// Output vertex attributes (to fragment shader)
+out vec3 fragPosition;
 
 void main()
-[
-    # Calculate fragment position based on model transformations
-    fragPos = vertexPosition
+{
+    // Calculate fragment position based on model transformations
+    fragPosition = vertexPosition;
 
-    # Remove translation from the view matrix
-    mat4 rotView = mat4(mat3(view))
-    vec4 clipPos = projection*rotView*vec4(vertexPosition, 1.0)
+    // Remove translation from the view matrix
+    mat4 rotView = mat4(mat3(view));
+    vec4 clipPos = projection*rotView*vec4(vertexPosition, 1.0);
 
-    # Calculate final vertex position
-    gl_Position = clipPos.xyww
-]
+    // Calculate final vertex position
+    gl_Position = clipPos.xyzw;
+}