Activacion de evento a distancia/que un enemigo cuando te vea te atake/o alguna otra cosa...

CODE
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[ ============= ] > Event Trigger- Distancia < [ ============= ]
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Resumen:
- Crea una opción de condición para activar el evento cuando el héroe llega
a una distancia determinada.
Instrucciones:
- Coloca un comentario en el evento: "distance = n", siendo 'n' el número
correspondiente a la visión del evento. En otras palabras, el o evento
será activado cuando el héroe llega a 'n' casillas de distancia del evento.
=end

# Crea las configuraciones iniciales.
$DarkChocoboscripts = {} if $DarkChocoboscripts.nil?
$DarkChocoboscripts["Event Trigger: Distance"] = {}

module RPG; class Event; class Page
class Condition
attr_accessor :distance
alias dc_event_trigger_distance_initialize initialize
def initialize; dc_event_trigger_distance_initialize; @distance = 0; end
end
end; end; end
class Game_Event;attr_reader :event;end
class Game_Map
alias dc_event_trigger_distance_setup_events setup_events
def setup_events
dc_event_trigger_distance_setup_events
distance = 0
for event in @events; for page in event[1].event.pages; for command in page.list
if command.code == 108 and command.parameters[0].to_s.downcase.include?("distance = ")
command = command.parameters[0].to_s.downcase.clone
command.gsub!(" "){""} while command.include?(" ")
page.condition.distance =command.gsub("distance"){""}.gsub("="){""}.to_i;end
end; end; end
end
end
class Game_Event
alias dc_event_trigger_distance_update update
def update
dc_event_trigger_distance_update
if @interpreter.nil? then start if @page.condition.distance >= (self.x - $game_player.x).abs + (self.y - $game_player.y).abs end unless @page.condition.distance.nil?
end
end