[RGSS] DRG - Breath Effect

#==============================================================================
# ** DRG - Breath Effect
# Version : 1.01
# Author : LiTTleDRAgo
#==============================================================================
#==============================================================================
# ** Sprite_Character
#------------------------------------------------------------------------------
#  This sprite is used to display the character.It observes the Game_Character
#  class and automatically changes sprite conditions.
#==============================================================================
class Sprite_Character
  #--------------------------------------------------------------------------
  # * Alias Method
  #--------------------------------------------------------------------------
  alias_method :drg1732013_update, :update
  #--------------------------------------------------------------------------
  # * Frame Update
  #--------------------------------------------------------------------------
  def update
    drg1732013_update
    update_breath
  end
  #--------------------------------------------------------------------------
  # * Update Breath
  #--------------------------------------------------------------------------
  def update_breath
    if sprite_controlable?(@character)
      @zoom_wait,b = [(@zoom_wait||0)-1,0].max, 1.05
      @breath = true
      if self.zoom_y < b && !@up && @zoom_wait == 0
        self.zoom_y += 0.005
        @up, @zoom_wait = true, 20 if self.zoom_y >= b
      elsif self.zoom_y >= 1.0 && @up && @zoom_wait == 0
        self.zoom_y -= 0.005
        @up, @zoom_wait = false,60 if self.zoom_y <= 1.0
      end
    elsif @breath
      @breath = false
      self.zoom_y = @character.instance_variable_get(:@zoom_y) || 1
    end
  end
  #--------------------------------------------------------------------------
  # * sprite_controlable?
  #--------------------------------------------------------------------------
  def sprite_controlable?(character)
    return false if $game_system.map_interpreter.running?
    return false if character.move_route_forcing
    return false if $game_temp.message_window_showing
    return false if character.moving?
    return false if character.transparent
    return false if !character.is_a?(Game_Player)
    return true
  end
end