VX Passability Debug

class Plane_Mask < Plane
  ColorPass   = Color.new(255,255,255,125)
  ColorImpass = Color.new(0,0,0,125)

  def initialize(vport)
    super(vport)
    @width = 1
    @height = 1
    self.z = 90
  end

  def update
    if $game_map
      if @width != $game_map.width || @height != $game_map.height
        @width = $game_map.width
        @height = $game_map.height
        update_bitmap
      end
      self.ox = $game_map.display_x / 8
      self.oy = $game_map.display_y / 8
    end
  end

  def update_bitmap
    bmp = Bitmap.new(@width * 32, @height * 32)
    @width.times do |xp|
      @height.times do |yp|
        rect = [xp * 32 + 4, yp * 32 + 4, 32 - 8, 32 - 8]
        if $game_player.map_passable?(xp, yp)
          rect << ColorPass
          bmp.fill_rect(*rect)
        else
          rect << ColorImpass
          bmp.fill_rect(*rect)
        end
      end
    end
    self.bitmap = bmp
  end

end

class Spriteset_Map

  alias theo_init initialize
  def initialize
    theo_init
    @mask = Plane_Mask.new(@viewport1)
    @mask.update
  end

  alias theo_update update
  def update
    theo_update
    @mask.update if @mask
  end

  alias theo_dispose dispose
  def dispose
    theo_dispose
    @mask.dispose
  end

end