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Added packHalfFloat().

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This commit is contained in:
Dario Manesku 2013-12-11 04:32:13 +01:00
parent 530790970d
commit c01085856c
1 changed files with 15 additions and 0 deletions
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15
examples/common/shaderlib.sh
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@ -250,6 +250,21 @@ float unpackRgbaToFloat(vec4 _rgba)
return dot(_rgba, shift);
}
vec2 packHalfFloat(float _value)
{
const vec2 shift = vec2(256, 1.0);
const vec2 mask = vec2(0, 1.0 / 256.0);
vec2 comp = fract(_value * shift);
comp -= comp.xx * mask;
return comp;
}
float unpackHalfFloat(vec2 _rg)
{
const vec2 shift = vec2(1.0 / 256.0, 1.0);
return dot(_rg, shift);
}
float random(vec2 _uv)
{
return fract(sin(dot(_uv.xy, vec2(12.9898, 78.233) ) ) * 43758.5453);