FromRGB()

void ColorHSV::FromRGB

(

const Color3i &

rgb

)

Definition at line 101 of file color.cpp.

                                         {
  typedef double FloatT;
  FloatT r = (FloatT) rgb.r_/255.f;
  FloatT g = (FloatT) rgb.g_/255.f;
  FloatT b = (FloatT) rgb.b_/255.f;
  FloatT max_rgb = max(r, max(g, b));
  FloatT min_rgb = min(r, min(g, b));
  v_ = max_rgb;
 
  FloatT d = max_rgb - min_rgb;
  s_ = max_rgb == 0 ? 0 : d / max_rgb;
 
  if (max_rgb == min_rgb) {
    h_ = 0; // achromatic
  } else {
    if (max_rgb == r) {
      h_ = (g - b) / d + (g < b ? 6 : 0);
    } else if (max_rgb == g) {
      h_ = (b - r) / d + 2;
    } else if (max_rgb == b) {
      h_ = (r - g) / d + 4;
    }
    h_ /= 6;
  }
}

References Color3i::b_, Color3i::g_, h_, Color3i::r_, s_, and v_.

Referenced by ColorHSV(), and operator=().

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