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25 lines
546 B
C
25 lines
546 B
C
float DecodeHeightmap(float4 heightmap)
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{
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float4 table = float4(1.0, -1.0, 0.0, 0.0);
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return dot(heightmap, table);
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}
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float DecodeHeightmap(shTexture2D HeightmapSampler, float2 texcoord)
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{
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float4 heightmap = shSample(HeightmapSampler, texcoord);
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return DecodeHeightmap(heightmap);
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}
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float4 EncodeHeightmap(float fHeight)
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{
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float h = fHeight;
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float positive = fHeight > 0.0 ? fHeight : 0.0;
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float negative = fHeight < 0.0 ? -fHeight : 0.0;
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float4 color = float4(0,0,0,0);
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color.r = positive;
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color.g = negative;
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return color;
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}
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