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36 lines
671 B
GLSL
36 lines
671 B
GLSL
uniform int fogenabled;
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uniform vec4 fogcolor;
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uniform vec3 camerapos;
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varying vec4 pixelpos;
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varying vec4 fogparm;
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//===========================================================================
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//
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// Main shader routine
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//
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//===========================================================================
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void main()
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{
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float fogdist;
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float fogfactor;
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//
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// calculate fog factor
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//
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#ifndef NO_SM4
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if (fogenabled == -1)
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{
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fogdist = pixelpos.w;
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}
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else
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{
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fogdist = max(16.0, distance(pixelpos.xyz, camerapos));
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}
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#else
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fogdist = pixelpos.w;
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#endif
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fogfactor = exp2 (fogparm.z * fogdist);
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gl_FragColor = vec4(fogcolor.rgb, 1.0 - fogfactor);
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}
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