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20 lines
580 B
20 lines
580 B
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out vec4 sk_FragColor;
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uniform vec4 colorGreen;
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uniform vec4 colorRed;
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vec4 main() {
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vec4 value = colorGreen.yyyy * 2.5;
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vec4 whole;
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vec4 fraction;
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bvec4 ok;
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fraction.x = modf(value.x, whole.x);
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ok.x = whole.x == 2.0 && fraction.x == 0.5;
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fraction.xy = modf(value.xy, whole.xy);
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ok.y = whole.y == 2.0 && fraction.y == 0.5;
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fraction.xyz = modf(value.xyz, whole.xyz);
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ok.z = whole.z == 2.0 && fraction.z == 0.5;
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fraction = modf(value, whole);
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ok.w = whole.w == 2.0 && fraction.w == 0.5;
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return all(ok) ? colorGreen : colorRed;
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}
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