CalcSaturation()

float anonymous_namespace{Painter.cpp}::CalcSaturation	(	float	time_delta_ms,
		const ColorHSV &	color,
		bool	key_on )

Definition at line 73 of file Painter.cpp.

                                                                              {
  if (color.v_ <= 0.0) {
    return color.s_;
  }
  if (!key_on) {
    return 1.0f;
  }
  static const float kDefaultSaturationTime = 0.05f * 1000.f;
  
  // At time = 0.0 the saturation_factor will be at 0.0 and then transition to 1.0
  float saturation_factor = mapf(time_delta_ms,
                                 0.0f, kDefaultSaturationTime,
                                 0.0f, 1.0f);
  // As time increases the saturation factor will continue
  // to grow past 1.0. We use min to clamp it back to 1.0.
  saturation_factor = MIN(1.0f, saturation_factor);
  // TODO - make the saturation interpolate between the original
  // color and the unsaturated state.
 return saturation_factor;
}

References mapf(), MIN, ColorHSV::s_, and ColorHSV::v_.

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