全局坐标与局部坐标互相转换

import flash.display.Sprite;

import flash.events.MouseEvent;

import flash.geom.Point;



var square:Sprite = new Sprite();

square.graphics.beginFill(0xFFCC00);

square.graphics.drawRect(0, 0, 100, 100);

square.x = 100;

square.y = 200;



addChild(square);



square.addEventListener(MouseEvent.CLICK, traceCoordinates);



function traceCoordinates(event:MouseEvent):void

{

	//将 point 对象从显示对象的(本地)坐标转换为舞台(全局)坐标。 

	var squareClickPoint:Point = new Point(square.mouseX,square.mouseY);

	trace("display object coordinates:", squareClickPoint);

	var stageClickPoint:Point = square.localToGlobal(squareClickPoint);

	trace("stage coordinates:", stageClickPoint);

	//将 point 对象从舞台(全局)坐标转换为显示对象的(本地)坐标。 

	var _stageClickPoint:Point=new Point(mouseX,mouseY);

	var _squareClickPoint:Point = square.globalToLocal (_stageClickPoint);

	trace("display object coordinates:", _squareClickPoint);

	trace("stage coordinates:", _stageClickPoint);

}