uHSL2RGB
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User-Defined Function: vector uHSL2RGB( vector vColHSL );
Returns a percentage based vector that is vColHSL converted to a RGB.
- vColHSL: source color as percentages of range.
Code:
- LSO: 420 bytes
- MONO: 1536 bytes
vector uHSL2RGB( vector vColHSL ){ //-- <H, S, L>
vector vColRGB;
if (vColHSL.y){
vColRGB.x = (1.0 - llFabs( 2 * vColHSL.z - 1.0 )) * vColHSL.y; //-- C
vColHSL.x = vColHSL.x * 6.0; //-- H'
vColRGB.y = vColRGB.x * (1.0 - llFabs( (integer)vColHSL.x % 2 + (vColHSL.x - (integer)vColHSL.x) - 1.0 )); //-- X
vColRGB = llList2Vector( [<vColRGB.x, vColRGB.y, vColRGB.z>,
<vColRGB.y, vColRGB.x, vColRGB.z>,
<vColRGB.z, vColRGB.x, vColRGB.y>,
<vColRGB.z, vColRGB.y, vColRGB.x>,
<vColRGB.y, vColRGB.z, vColRGB.x>,
<vColRGB.x, vColRGB.z, vColRGB.y>],
(integer)vColHSL.x % 6 ) + (vColHSL.z - 0.5 * vColRGB.x) * <1.0, 1.0, 1.0>;
}else{
vColRGB.x = vColRGB.y = vColRGB.z = vColHSL.z; //-- greyscale
}
return vColRGB;
}
/*//-- Anti-License Text --//*/
/*// Contributed Freely to the Public Domain without limitation. //*/
/*// 2011 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/
/*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/
/*//-- --//*/
Caveats
- This function does not check input HSL validity.
- expected values are in percentage of range (value / range)
- HSL is kept percentage based here for best compatibility with image mapping
Notes
- To convert RGB or HSL values from other software to percentage based, simply divide each value by it's range
- range is determined by subtracting the lower bound from the upper bound.
- To convert RGB or HSL percentages to your preferred format, multiply the value by the preferred range.