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Posted By

michaJlS on 02/10/11


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RGB hsv


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alexteg


HSV2RGB

 / Published in: PHP
 

I don't remember where I have found it.

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  1. function HSV_TO_RGB(array $hsv) {
  2.     list($H,$S,$V) = $hsv;
  3.     //1
  4.     $H *= 6;
  5.     //2
  6.     $I = floor($H);
  7.     $F = $H - $I;
  8.     //3
  9.     $M = $V * (1 - $S);
  10.     $N = $V * (1 - $S * $F);
  11.     $K = $V * (1 - $S * (1 - $F));
  12.     //4
  13.     switch ($I) {
  14.         case 0:
  15.             list($R,$G,$B) = array($V,$K,$M);
  16.             break;
  17.         case 1:
  18.             list($R,$G,$B) = array($N,$V,$M);
  19.             break;
  20.         case 2:
  21.             list($R,$G,$B) = array($M,$V,$K);
  22.             break;
  23.         case 3:
  24.             list($R,$G,$B) = array($M,$N,$V);
  25.             break;
  26.         case 4:
  27.             list($R,$G,$B) = array($K,$M,$V);
  28.             break;
  29.         case 5:
  30.         case 6: //for when $H=1 is given
  31.             list($R,$G,$B) = array($V,$M,$N);
  32.             break;
  33.     }
  34.     return array($R, $G, $B);
  35. }

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