code: @Override
  	protected void doTransform(ITransformable.Brightness transformable, float comp)
  	{
  		if (comp <= 0)
  			return;
  
  		float from = reversed ? toBrightness : fromBrightness;
  		float to = reversed ? fromBrightness : toBrightness;
  
  		transformable.setBrightness((int) (from + (to - from) * comp));
  	}
docs: Calculates the transformation.
  
  @param transformable the transformable
  @param comp the comp