package
{
 
    public class Grid
    {
        private var _startNode:Node;//开始节点
        private var _endNode:Node;//目标节点
        private var _nodes:Array;//节点数组
        private var _numCols:int;//列数
        private var _numRows:int;//行数
 
        public function Grid(numCols:int, numRows:int)
        {
            _numCols=numCols;
            _numRows=numRows;
            _nodes=new Array();
            for (var i:int=0; i < _numCols; i++)
            {
                _nodes[i]=new Array();
                for (var j:int=0; j < _numRows; j++)
                {
                    _nodes[i][j]=new Node(i, j);
                }
            }
        }
 
        public function getNode(x:int, y:int):Node
        {
            return _nodes[x][y] as Node;
        }
 
 
        public function setEndNode(x:int, y:int):void
        {
            _endNode=_nodes[x][y] as Node;
        }
 
 
        public function setStartNode(x:int, y:int):void
        {
            _startNode=_nodes[x][y] as Node;
        }
 
 
        public function setWalkable(x:int, y:int, value:Boolean):void
        {
            _nodes[x][y].walkable=value;
        }
 
 
        public function get endNode():Node
        {
            return _endNode;
        }
 
 
        public function get numCols():int
        {
            return _numCols;
        }
 
 
        public function get numRows():int
        {
            return _numRows;
        }
 
 
        public function get startNode():Node
        {
            return _startNode;
        }
    }
}