Introduction - If you have any usage issues, please Google them yourself
this._mapWidth = mapWidth
this._mapHeight = mapHeight
this._tilePixelWidth = tilePixelWidth
this._tilePixelHeight = tilePixelHeight
var row:int = this._mapHeight/this._tilePixelHeight
var col:int = this._mapWidth/this._tilePixelWidth
this._wHalfTile = int(this._tilePixelWidth/2)
this._hHalfTile = int(this._tilePixelHeight/2)
var grid:Shape = new Shape()
this.addChild(grid)