[solved] Line of Sight - enemies have x-ray vision

Hello,

I'm using Fomar0153's Line of Sight script.

Currently I'm creating an area where the player has to sneak past patrolling enemies and use the environment to hide from them. However, I noticed that the enemies can actually see through walls. I would like the enemies to not see the player if there's a tile between them that cannot be passed.

Does anyone know how to modify the script in such a way? I will post the script below - hope that is ok.

=begin
Line of Sight
by Fomar0153
Version 1.0
----------------------
Notes
----------------------
Allows you to have events trigger when they see the player
----------------------
Instructions
----------------------
Nametag events with:
<sight x>
where x is the range.

Also the events should be either player touch or event touch.
----------------------
Known bugs
----------------------
None
=end

class Game_Player < Game_Character
  #--------------------------------------------------------------------------
  # * Trigger Map Event
  #     triggers : Trigger array
  #     normal   : Is priority set to [Same as Characters] ?
  #--------------------------------------------------------------------------
  def start_sight_event(x, y, triggers, normal)
    return if $game_map.interpreter.running?
    $game_map.sight_xy(x, y).each do |event|
      if event.trigger_in?(triggers)
        event.start
      end
    end
  end
  #--------------------------------------------------------------------------
  # * Determine if Same Position Event is Triggered
  #--------------------------------------------------------------------------
  alias sight_check_event_trigger_here check_event_trigger_here
  def check_event_trigger_here(triggers)
    sight_check_event_trigger_here(triggers)
    start_sight_event(@x, @y, [1,2], true) if triggers.include?(1)
  end
end

class Game_Map
  #--------------------------------------------------------------------------
  # * Get Array of Events at Designated Coordinates
  #--------------------------------------------------------------------------
  def sight_xy(x, y)
    @events.values.select {|event| event.see?(x, y) }
  end
end

class Game_CharacterBase
  #--------------------------------------------------------------------------
  # * Determine Coordinate Match
  #--------------------------------------------------------------------------
  def see?(x, y)
    s = sight
    xx = [x, x - (@direction == 6 ? 1 : @direction == 4 ? -1 : 0) * s]
    yy = [y, y - (@direction == 2 ? 1 : @direction == 8 ? -1 : 0) * s]
    @x.between?(xx.min, xx.max) && @y.between?(yy.min, yy.max)
  end
  #--------------------------------------------------------------------------
  # * Determine Range of Sight
  #--------------------------------------------------------------------------
  def sight
    if @sight.nil?
      if !@event.nil? && @event.name =~ /<sight (.*)>/i
        @sight = $1.to_i
      else
        @sight = 0
      end
    end
    @sight
  end
end

class Game_Event < Game_Character
  #--------------------------------------------------------------------------
  # * Change Direction to Designated Direction
  #     d : Direction (2,4,6,8)
  #--------------------------------------------------------------------------
  def set_direction(d)
    super
    check_player_spotted
  end
  #--------------------------------------------------------------------------
  # * Determine if the player is in sight
  #--------------------------------------------------------------------------
  def check_player_spotted
    return if $game_map.interpreter.running? || @starting
    if @trigger == 2 && self.see?($game_player.x,$game_player.y)
      start if !jumping? && normal_priority?
    end
  end
end