oups forgot to add

git-svn-id: http://svn.net-core.org/repos/t-engine4@3792 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/class/WildernessGrid.lua

+-- ToME - Tales of Maj'Eyal
+-- Copyright (C) 2009, 2010, 2011 Nicolas Casalini
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+--
+-- Nicolas Casalini "DarkGod"
+-- darkgod@te4.org
+
+require "engine.class"
+local Particles = require "engine.Particles"
+local Grid = require "mod.class.Grid"
+
+module(..., package.seeall, class.inherit(Grid))
+
+function _M:init(t, no_default)
+	Grid.init(self, t, no_default)
+end
+
+--- Attach or remove a display callback
+-- Defines particles to display
+function _M:defineDisplayCallback()
+	if not self._mo then return end
+
+	self._mo:displayCallback(function(x, y, w, h, zoom, on_map)
+		local glow = game.level.entrance_glow
+		if glow and self.change_zone and not game.visited_zones[self.change_zone] then
+			glow:checkDisplay()
+			if glow.ps:isAlive() then glow.ps:toScreen(x + w / 2, y + h / 2, true, w / (game.level and game.level.map.tile_w or w))
+			else self:removeParticles()
+			end
+		end
+
+		return true
+	end)
+end