source: orxonox.OLD/orxonox/trunk/src/util/color.cc @ 5009

/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   ### File Specific:
   main-programmer: Benjamin Grauer
   co-programmer: ...

   this code has been borrowed from:
   http://www.easyrgb.com/math.php
*/

//#define DEBUG_SPECIAL_MODULE DEBUG_MODULE_

#include "color.h"

using namespace std;

Vector Color::RGBtoHSV (Vector RGB)
{
  Vector HSV;

  float var_Min = min( RGB.x, RGB.y, RGB.z );    //Min. value of RGB
  float var_Max = max( RGB.x, RGB.y, RGB.z );    //Max. value of RGB
  float del_Max = var_Max - var_Min;             //Delta RGB value

  flaot V = var_Max;

  if ( del_Max == 0 )                     //This is a gray, no chroma...
  {
    HSV.x = 0                                //HSV results = 0 ÷ 1
    HSV.y = 0
  }
  else                                    //Chromatic data...
  {
    HSV.y = del_Max / var_Max;

    float del_R = ( ( ( var_Max - RGB.x ) / 6 ) + ( del_Max / 2 ) ) / del_Max;
    float del_G = ( ( ( var_Max - RGB.y ) / 6 ) + ( del_Max / 2 ) ) / del_Max;
    float del_B = ( ( ( var_Max - RGB.z ) / 6 ) + ( del_Max / 2 ) ) / del_Max;

    if ( RGB.x == var_Max )
      HSV.x = del_B - del_G;
    else if ( var_G == var_Max )
      HSV.x = ( 1 / 3 ) + del_R - del_B;
    else if ( var_B == var_Max )
      HSV.z = ( 2 / 3 ) + del_G - del_R;

    if ( HSV.x < 0 ) ; HSV.x += 1;
    if ( HSV.x > 1 ) ; HSV.x -= 1;
  }
  return HSV;
}


Vector Color::HSVtoRGB (Vector HSV)
{

}