测试两个不同类 AS3 中两个影片剪辑之间的碰撞

Question

我需要测试 2 个影片剪辑之间的碰撞，使用 air 作为 android 动作脚本 3。

它是一个物体和几个障碍物之间的碰撞。

我的结构如下：

基本 FLA 文件链接到名为 baseCode.as 的动作脚本文件。
在这个 AS 文件中，我使用以下代码创建障碍物：

baseCode.as :

package {
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.geom.Point;
    import Mc_MC;                // Not strictly needed

    public class baseCode extends flash.display.MovieClip
    {
        //private static var SYMBOLS:Array = new Array(MySymbol1, MySymbol2);
        public var t:int = 0;
        public function baseCode()
        {
            // Create five symbols:
            for (var i:int = 0; i < 5; i++) {
                trace(i);
                makeSymbol();
            }
        }

    function randomRange(minNum:Number, maxNum:Number):Number 
    {
       return (Math.floor(Math.random() * (maxNum - minNum + 1)) + minNum);
    }
        public function makeSymbol():void
        {


            trace("IT entered makeSymbol");
            // Pick a random symbol from the array:
          // var symType:Class = SYMBOLS[0];

            //trace(SYMBOLS[Math.random() * SYMBOLS.length]);
            // Construct the new symbol:
            //var Positi : Number = new Number(Math.random);
           var loc:Point = new Point(randomRange(100,stage.stage.height),0);
           var loc2:Point = new Point(randomRange(110,stage.stage.height),0);
            //var loc:Point = new Point(10*randomRange(15, stage.width),100*randomRange(10 , stage.width));
            trace("this is the starting point" , loc);
            var sym:Mc_MC = new Mc_MC(1 + Math.random() *10, loc);
            if( t % 2 == 0 ){
            var sym2:Mc_MC2 = new Mc_MC2(15 + Math.random() *10, loc);
            // Listen for the object hitting the left edge:
            //sym2.addEventListener(Event.COMPLETE, remakeObject);
            this.addChild(sym2);
            }
            sym.addEventListener(Event.COMPLETE, remakeObject);
            this.addChild(sym);
            t ++;

        }


        public function remakeObject(e:Event):void
        {
                e.target.removeEventListener(Event.COMPLETE, remakeObject);
            //e.removeChild(sym);
            //e.parent.removeChild(this.child);
        //  removeChild(this);
           // this.removeChild(sym);
            // Replace the dead symbol:
            makeSymbol();
        }
    }
}

Mc_MC 和 Mc_MC2 是两个 Action Script 文件，其中调用了障碍物：

Mc_MC.as :

 package { 
        import flash.display.MovieClip;
        import flash.events.Event;
        import flash.geom.*;
        import flash.display.Screen;
        import flash.system.Capabilities;
        public class Mc_MC extends MovieClip
        {


        public var speed:Number;       //  Pixels moved per frame
     var valuee:baseCode;

    public function Mc_MC(speed:Number, startPosition:Point)
    {
        this.speed = speed;
        this.addEventListener(Event.ENTER_FRAME, update);

        this.x = startPosition.x;
        this.y = startPosition.y;
    }


    public function update(speed:Number)


    {
        var screenWidth:Number = Capabilities.screenResolutionX;
        var screenHeight:Number = Capabilities.screenResolutionY;


        trace("this.y" , this.y);
        trace("this is the stage height" , screenHeight);
        trace("this.speed" , this.speed);

       if (this.y >= screenHeight - 100) {  // We're at the left edge
            trace("Entered if");
            trace("new Starting Pos" , this.y);

            this.y = stage.height;
                parent.removeChild(this);

        this.removeEventListener(Event.ENTER_FRAME, update);

            this.dispatchEvent(new Event(Event.COMPLETE));
        }
        else this.y += this.speed;
    }
    }
}

在基础 FLA 文件中，我创建了主要对象，它将与使用 Mc_MC 和 Mc_MC2 创建的所有障碍物发生碰撞。我使用以下代码创建它：

Home.fla

import flash.events.*

//import flash.events.EventDispatcher.addEventListener()

import flash.display.DisplayObject;
//import flash.events.MouseEvent;
import flashx.textLayout.events.UpdateCompleteEvent;
import flash.display.MovieClip;

var offsetX:Number;
var offsetY:Number;
//var draggedObject:DisplayObject;
var my_obj:OriginalObject = new OriginalObject();
//left.addEventListener(MouseEvent.MOUSE_MOVE, drag);


//The speed of the scroll movement.
var scrollSpeed:uint = 2;

//This adds two instances of the movie clip onto the stage.
var s1:ScrollBg = new ScrollBg();
var s2:ScrollBg = new ScrollBg();



left.addEventListener(MouseEvent.MOUSE_DOWN,mouseDown);

function mouseDown(e:MouseEvent):void {

    stage.addEventListener(MouseEvent.MOUSE_UP,mouseUp); //listen for mouse up on the stage, in case the finger/mouse moved off of the button accidentally when they release.
    addEventListener(Event.ENTER_FRAME,myButtonClick); //while the mouse is down, run the tick function once every frame as per the project frame rate
}

function mouseUp(e:MouseEvent):void {
    removeEventListener(Event.ENTER_FRAME,myButtonClick);  //stop running the tick function every frame now that the mouse is up
    stage.removeEventListener(MouseEvent.MOUSE_UP,mouseUp); //remove the listener for mouse up
}


right.addEventListener(MouseEvent.MOUSE_DOWN,mouseDown2);
function mouseDown2(e:MouseEvent):void {

    stage.addEventListener(MouseEvent.MOUSE_UP,mouseUp2); //listen for mouse up on the stage, in case the finger/mouse moved off of the button accidentally when they release.
    addEventListener(Event.ENTER_FRAME,stopDragging); //while the mouse is down, run the tick function once every frame as per the project frame rate
}

function mouseUp2(e:MouseEvent):void {
    removeEventListener(Event.ENTER_FRAME,stopDragging);  //stop running the tick function every frame now that the mouse is up
    stage.removeEventListener(MouseEvent.MOUSE_UP,mouseUp2); //remove the listener for mouse up
}



my_obj.x = stage.width / 2;
my_obj.y = stage.height  - (stage.height / 3 );


stage.addChild(my_obj);

function myButtonClick(ev:Event):void
{

    trace("UPPP");


    if(my_obj.x > (my_obj.width*2)){
    my_obj.x = my_obj.x - 10;

    trace("In the limit");
    }

    else {

          trace("out of bounds");

    }

    trace("myButton has been clicked.");

    }

    //// This function is called when the mouse button is released. 
    function stopDragging(ev2:Event):void
    {
            trace("Down");
            if(my_obj.x <= right.x){
            my_obj.x = my_obj.x + 10;
            }



    }

考虑到来自不同的 AS 文件，我如何测试移动的 Mc_MC / Mc_MC2 与 my_obj 的碰撞？

我是 AS 新手，如有任何帮助，我们将不胜感激！

Answer 1

如果您希望能够对来自不同 classes/parentage 的对象进行碰撞测试，那么您需要以一种可以获取对所述对象的引用的方式设置您的项目。

从外观上看，你的两个对象实际上已经在同一个 class 中（因为你的主时间线代码和文档 class 代码共享相同的范围，所以你在一个中声明的内容应该在另一个中可用）。

您唯一缺少的是对您的 obstacle/Mc_MC 的顶级引用。目前，您将其分配给范围为 makeSymbol 函数的 var（因此您只能在该函数内引用它）。

解决方案

在您的文档 class (baseCode.as) 中，创建一个顶级变量来保存对该障碍的引用：（作为参考，您有一个名为 t 的顶级变量，将此行放在上面或下面）

    private var obstacle:Mc_MC;

稍后在实例化新 Mc_MC (makeSymbol) 的函数中，将实例分配给该顶级变量：

    obstacle = new Mc_MC(1 + Math.random() *10, loc);
    addChild(obstacle);

现在您可以在主时间线或文档 class.

的任何其他地方访问该 obstacle 变量

   if(my_obj.hitTest(obstacle)){

   }

顺便说一句，如果您有一个文档 class，那么在您的主时间轴的第一帧上放置代码是没有意义的，因为该代码在您的文档 class 中的工作方式相同（尽管它必须包含在函数中）。以下是移动主要时间线代码的示例：

    public class Main extends MovieClip {

        public function Main():void {
            //listen for the added to stage event prior to do anything display oriented
            this.addEventListener(Event.ADDED_TO_STAGE, init);
        }

        private function init(e:Event):void {
            //this is the best place to put the equivalent of timeline code (not including vars or functions, put those in the class root NOT nested here)
        }
    }

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