Near Fantasica's View Range HELP

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I really need help with Near's View Range script. I have the newest, updated version

Spoiler

#==============================================================================
# ** View Range Module
#==============================================================================
# Near Fantastica
# Version 4
# 29.11.05
#==============================================================================

#--------------------------------------------------------------------------
# * SDK Log Script
#--------------------------------------------------------------------------
SDK.log("View Range", "Near Fantastica", 4, "29.11.05")

#--------------------------------------------------------------------------
# * Begin SDK Enable Test
#--------------------------------------------------------------------------
if SDK.state("View Range") == true
  module VR
    #----------------------------------------------------------------------------
    def VR.in_range?(element, object, range)
      x = (element.x - object.x) * (element.x - object.x)
      y = (element.y - object.y) * (element.y - object.y)
      r = x + y
      if r <= (range * range)
        return true
      else
        return false
      end
    end
    #----------------------------------------------------------------------------
    def VR.range(element, object)
      x = (element.x - object.x) * (element.x - object.x)
      y = (element.y - object.y) * (element.y - object.y)
      r = x + y
      r = Math.sqrt(r)
      return r.to_i
    end
  end
 
  #==============================================================================
  class Interpreter
    #----------------------------------------------------------------------------
    def event
      return $game_map.events[@event_id]
    end
  end
 
#--------------------------------------------------------------------------
# * End SDK Enable Test
#--------------------------------------------------------------------------
end

However I need to know what the code is for viewing in a straight line.

I have a code for viewing in a circle:

VR.in_range?($game_map.events[2], $game_player, 4)

However I need it to work so that the event will see in a straight line. Also, say he turns left, I need it so that he will continue to view in the direction he's facing.

Please help me