矩形与形状碰撞

 

const KEY_A:uint=65;
const KEY_D:uint=68;
const KEY_S:uint=83;
const KEY_W:uint=87;

var key:Object=new Object
var speed:Number=2
stage.frameRate=30
stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDown)
stage.addEventListener(KeyboardEvent.KEY_UP,keyUp)
this.addEventListener(Event.ENTER_FRAME,test)
function isDown(keyCode:uint):Boolean
{
 return key[keyCode]?true:false
}
//按下事件侦听器
function keyDown(e:KeyboardEvent):void
{
 key[e.keyCode]=true 
}
//释放事件侦听器
function keyUp(e:KeyboardEvent):void
{
 delete key[e.keyCode]
}
function test(e:Event):void
{ 
 if(key[KEY_A])
 {
  mc.x-=speed
 }
 if(key[KEY_D])
 {
  mc.x+=speed
 }
 if(key[KEY_W])
 {
  mc.y-=speed
 }
 if(key[KEY_S])
 {
  mc.y+=speed
 }
 checkhit()
}
function checkhit():void
{
 var rect:Rectangle=mc.getBounds(this)
 var leftAndTop:Boolean=map.hitTestPoint(rect.x,rect.y,true)
 var leftAndBottom:Boolean=map.hitTestPoint(rect.x,rect.bottom,true)
 var rightAndTop:Boolean=map.hitTestPoint(rect.right,rect.y,true)
 var rightAndBottom:Boolean=map.hitTestPoint(rect.right,rect.bottom,true)
 
 if(leftAndTop||leftAndBottom)
 {
  mc.x+=speed
 }
 if(rightAndTop||rightAndBottom)
 {
  mc.x-=speed
 }
 
 if(leftAndTop||rightAndTop)
 {
  mc.y+=speed
 }
 if(leftAndBottom||rightAndBottom)
 {
  mc.y-=speed
 }
 
}