30 lines
709 B
Plaintext
30 lines
709 B
Plaintext
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vec4 packFloatToRgba(float _value)
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{
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const vec4 shift = vec4(256 * 256 * 256, 256 * 256, 256, 1.0);
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const vec4 mask = vec4(0, 1.0 / 256.0, 1.0 / 256.0, 1.0 / 256.0);
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vec4 comp = fract(_value * shift);
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comp -= comp.xxyz * mask;
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return comp;
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}
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float unpackRgbaToFloat(vec4 _rgba)
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{
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const vec4 shift = vec4(1.0 / (256.0 * 256.0 * 256.0), 1.0 / (256.0 * 256.0), 1.0 / 256.0, 1.0);
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return dot(_rgba, shift);
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}
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vec2 packHalfFloat(float _value)
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{
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const vec2 shift = vec2(256, 1.0);
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const vec2 mask = vec2(0, 1.0 / 256.0);
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vec2 comp = fract(_value * shift);
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comp -= comp.xx * mask;
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return comp;
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}
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float unpackHalfFloat(vec2 _rg)
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{
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const vec2 shift = vec2(1.0 / 256.0, 1.0);
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return dot(_rg, shift);
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}
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