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Fix sampler index check

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The index values are round numbers. Checking agaist
the half-values improves robustness against small
floating point delta errors that occur on some GPUs.
This commit is contained in:
Paul Chote
2018-10-03 22:51:49 +01:00
parent 01d340db09
commit cc9da63323
1 changed files with 7 additions and 7 deletions
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14
glsl/combined.frag
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@@ -38,19 +38,19 @@ float jet_b(float x)
vec4 Sample(float samplerIndex, vec2 pos)
{
if (samplerIndex < 1.0)
if (samplerIndex < 0.5)
return texture2D(Texture0, pos);
else if (samplerIndex < 2.0)
else if (samplerIndex < 1.5)
return texture2D(Texture1, pos);
else if (samplerIndex < 3.0)
else if (samplerIndex < 2.5)
return texture2D(Texture2, pos);
else if (samplerIndex < 4.0)
else if (samplerIndex < 3.5)
return texture2D(Texture3, pos);
else if (samplerIndex < 5.0)
else if (samplerIndex < 4.5)
return texture2D(Texture4, pos);
else if (samplerIndex < 6.0)
else if (samplerIndex < 5.5)
return texture2D(Texture5, pos);
else if (samplerIndex < 7.0)
else if (samplerIndex < 6.5)
return texture2D(Texture6, pos);
return texture2D(Texture7, pos);