iso

/**
 * Copyright lizhi ( http://wonderfl.net/user/lizhi )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/HBgb
 */

package 
{
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.events.MouseEvent;
	import flash.geom.Point;
	/**
	 * ...
	 * @author lizhi http://game-develop.net/
	 */
	public class TestGrid extends Sprite
	{
		private var shape:Shape = new Shape;
		public function TestGrid() 
		{
			for (var x:int = 0; x < 10;x++ ) {
				for (var y:int = 0; y < 10;y++ ) {
					var p:Point = toP(x, y);
					graphics.lineStyle(0);
					graphics.drawCircle(p.x*20+200, p.y*20+100, 2);
				}
			}
			addChild(shape);
			
			stage.addEventListener(MouseEvent.CLICK, stage_click);
		}
		
		private function stage_click(e:MouseEvent):void 
		{
			shape.graphics.clear();
			shape.graphics.lineStyle(0, 0xff0000);
			var x:Number = (mouseX - 200) / 20;
			var y:Number = (mouseY - 100) / 20;
			p = fromP(x, y);
			x = p.x;
			y = p.y;
			for (var i:int = x; i <= x+1;i++ ) {
				for (var j:int = y; j<=y+1;j++ ) {
					var p:Point = toP(i, j);
					shape.graphics.drawCircle(p.x*20+200, p.y*20+100, 2);
				}
			}
		}
		
		public function toP(x:Number, y:Number):Point {
			return new Point(x - y, (x + y) * .5);
		}
		
		public function fromP(sx:Number, sy:Number):Point {
			return new Point(sy + sx * .5, sy - sx * .5);
		}
		
	}

}