mirror of
https://github.com/minetest/minetest.git
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39 lines
943 B
Plaintext
39 lines
943 B
Plaintext
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uniform sampler2D ColorMapSampler;
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varying vec4 tPos;
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#ifdef COLORED_SHADOWS
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// c_precision of 128 fits within 7 base-10 digits
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const float c_precision = 128.0;
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const float c_precisionp1 = c_precision + 1.0;
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float packColor(vec3 color)
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{
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return floor(color.b * c_precision + 0.5)
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+ floor(color.g * c_precision + 0.5) * c_precisionp1
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+ floor(color.r * c_precision + 0.5) * c_precisionp1 * c_precisionp1;
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}
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const vec3 black = vec3(0.0);
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#endif
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void main()
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{
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vec4 col = texture2D(ColorMapSampler, gl_TexCoord[0].st);
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#ifndef COLORED_SHADOWS
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if (col.a < 0.5)
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discard;
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#endif
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float depth = 0.5 + tPos.z * 0.5;
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// ToDo: Liso: Apply movement on waving plants
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// depth in [0, 1] for texture
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//col.rgb = col.a == 1.0 ? vec3(1.0) : col.rgb;
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#ifdef COLORED_SHADOWS
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float packedColor = packColor(mix(col.rgb, black, col.a));
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gl_FragColor = vec4(depth, packedColor, 0.0,1.0);
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#else
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gl_FragColor = vec4(depth, 0.0, 0.0, 1.0);
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#endif
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}
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