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22 lines
640 B
Text
22 lines
640 B
Text
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vec4 Lightmode_Build()
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{
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// z is the depth in view space, positive going into the screen
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#if defined(SWLIGHT_RADIAL)
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float z = distance(pixelpos.xyz, uCameraPos.xyz);
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#else
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float z = pixelpos.w;
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#endif
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// This is a lot more primitive than Doom's lighting...
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float numShades = float(uPalLightLevels & 255);
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float curshade = (1.0 - uLightLevel) * (numShades - 1.0);
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float visibility = max(uGlobVis * uLightFactor * z, 0.0);
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float shade = clamp((curshade + visibility), 0.0, numShades - 1.0);
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float newlightlevel = 1.0 - clamp(shade * uLightDist, 0.0, 1.0);
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vec4 color = vColor;
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color.rgb *= newlightlevel;
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return color;
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}
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