// Vertex Shader



attribute vec3 aPosition, aNormal;

uniform vec3 CameraPos;

uniform mat4 ModelViewProjectionMatrix, NormalMatrix, ModelMatrix;

varying vec3 vReflection;

void main() {

      // normal and position calculation

      vec3 normal = normalize(NormalMatrix * vec4(aNormal,0)).xyz;

      gl_Position = ModelViewProjectionMatrix * vec4(aPosition,1);



      // Here is the environment map calculation

      //

      // First you have to calculate the Vertex Position in WorldPosition

      // So you just need to multiply the Position by the ModelMatrix

      vec3 vertex = (ModelMatrix * vec4(aPosition,1)).xyz;

      // Now you have to do the same to the Normal, so you multiply

      // the normal by the ModelMatrix (don't use the Normal calculated 

      // before)

      vec3 N = normalize((ModelMatrix * vec4(aNormal,0)).xyz);

      // The Incident value is the different of vertex and camera position

      // (both on world coordinates)

      vec3 I = vertex - CameraPos;

      // Finaly you just simply calculate the reflection using reflect

      // and as it is a varying variable, it is sent to the Fragment Shader

      vReflection = reflect(I,N);

}

// Fragment Shader



uniform samplerCube CubeMap;

varying vec3 vReflection;

void main() {

      // Get the pixel color from the samplerCube using the Reflection that

      // was calculated on the Vertex Shader

      vec4 cubeColor = textureCube( CubeMap, vReflection );

      // Just send the Color to the gl_FragColor

      gl_FragColor = cubeColor;

}

AS3 Tree - wonderfl build flash online

Pixel Perfect Particles with Basic Physics - wonderfl build flash online

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