CalcLuminance()

float anonymous_namespace{Painter.cpp}::CalcLuminance	(	float	time_delta_ms,
		bool	sustain_pedal_on,
		const Key &	key,
		int	key_idx )

Definition at line 39 of file Painter.cpp.

                                 {
                             
  if (key.curr_color_.v_ <= 0.0) {
    return 0.0;
  }
                             
  const bool dampened_key = (key_idx < kFirstNoteNoDamp);
  
  const float decay_factor = CalcDecayFactor(sustain_pedal_on,
                                             key.on_,
                                             key_idx,
                                             key.velocity_ * (1.f/127.f),  // Normalizing
                                             dampened_key,
                                             time_delta_ms);
                                                 
  if (key.on_) {
    //const float brigthness_factor = sin(key.orig_color_.v_ * PI / 2.0);
    float brigthness_factor = 0.0f;
    
    if (kUseLedCurtin) {
      brigthness_factor = sqrt(sqrt(key.orig_color_.v_));
    } else {
      //brigthness_factor = key.orig_color_.v_ * key.orig_color_.v_;
      brigthness_factor = key.orig_color_.v_;
    }
    return LuminanceDecay(decay_factor) * brigthness_factor;
    //return 1.0f;
  } else {
    return decay_factor * key.orig_color_.v_;
  }
}

References CalcDecayFactor(), Key::curr_color_, kFirstNoteNoDamp, kUseLedCurtin, LuminanceDecay(), Key::on_, Key::orig_color_, ColorHSV::v_, and Key::velocity_.

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