32 lines
772 B
Forth
32 lines
772 B
Forth
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#version 100
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precision mediump float;
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// Input vertex attributes (from vertex shader)
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varying vec3 fragPosition;
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// Input uniform values
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uniform samplerCube environmentMap;
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uniform bool vflipped;
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uniform bool doGamma;
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void main()
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{
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// Fetch color from texture map
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vec4 texelColor = vec4(0.0);
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if (vflipped) texelColor = textureCube(environmentMap, vec3(fragPosition.x, -fragPosition.y, fragPosition.z));
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else texelColor = textureCube(environmentMap, fragPosition);
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vec3 color = vec3(texelColor.x, texelColor.y, texelColor.z);
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if (doGamma) // Apply gamma correction
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{
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color = color/(color + vec3(1.0));
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color = pow(color, vec3(1.0/2.2));
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}
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// Calculate final fragment color
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gl_FragColor = vec4(color, 1.0);
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}
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