Timed Enemy Drops for Falcao's ABS

=begin
Timed Enemy Drops v1.1
Made by: Sixth

Just a little snippet to make the enemy drops timed in Falcao's ABS.
Once the timer runs out, the item drop will disappear automatically.

You can edit the erase timer and the fade out speed at the end of
the timer as well on the commented lines if you want.

Put this snippet below the default ABS scripts!

=end

class Sprite_EnemyDrop < Sprite

  alias add_erasetime9271 initialize
  def initialize(viewport, event, item)
    @etime = 1200 # Time in frames to stay on screen (60 frames = 1 second)
    @ftime = 60   # Fade out duration in frames.
    add_erasetime9271(viewport, event, item)
  end

  alias upd_erasetime7726 update
  def update
    upd_erasetime7726
    if @etime > 0
      @etime -= 1
      if @etime <= @ftime
        self.opacity -= 255.to_f/@ftime unless self.disposed?
      end
    else
      complete_action(false)
    end
  end

end