一些球涌到地板上。

Question

问题是，当我在舞台上有两个或更多的球时，一些球弹得很好，另一些球在地板上下沉。舞台上的地板已经在舞台上了。这是绘图问题还是别的什么问题？

    stop();
//ARRAYS
var ballArray:Array = new Array();

//ADD BALLS
var mediumBall1f2:Ball = new Ball  ;
ballArray.push(mediumBall1f2);
this.addChild(mediumBall1f2);
mediumBall1f2.ballX = 3;
mediumBall1f2.ballY = 8;
mediumBall1f2.x = 300;
mediumBall1f2.y = 250;
mediumBall1f2.width = 120;
mediumBall1f2.height = 120;

var mediumBall1f3:Ball = new Ball  ;
ballArray.push(mediumBall1f3);
this.addChild(mediumBall1f3);
mediumBall1f3.ballX = -3;
mediumBall1f3.ballY = 8;
mediumBall1f3.x = 200;
mediumBall1f3.y = 350;
mediumBall1f3.width = 140;
mediumBall1f3.height = 140;

var mediumBall1f4:Ball = new Ball  ;
ballArray.push(mediumBall1f4);
this.addChild(mediumBall1f4);
mediumBall1f4.ballX = -3;
mediumBall1f4.ballY = 8;
mediumBall1f4.x = 300;
mediumBall1f4.y = 250;
mediumBall1f4.width = 50;
mediumBall1f4.height = 50;

var mediumBall1f5:Ball = new Ball  ;
ballArray.push(mediumBall1f5);
this.addChild(mediumBall1f5);
mediumBall1f5.ballX = -3;
mediumBall1f5.ballY = 8;
mediumBall1f5.x = 400;
mediumBall1f5.y = 350;
mediumBall1f5.width = 80;
mediumBall1f5.height = 80;

var mediumBall1f6:Ball = new Ball  ;
ballArray.push(mediumBall1f6);
this.addChild(mediumBall1f6);
mediumBall1f6.ballX = 3;
mediumBall1f6.ballY = 8;
mediumBall1f6.x = 400;
mediumBall1f6.y = 320;
mediumBall1f6.width = 30;
mediumBall1f6.height = 30;

var mediumBall1f7:Ball = new Ball  ;
ballArray.push(mediumBall1f7);
this.addChild(mediumBall1f7);
mediumBall1f7.ballX = 3;
mediumBall1f7.ballY = 8;
mediumBall1f7.x = 400;
mediumBall1f7.y = 230;

var mediumBall1f8:Ball = new Ball  ;
ballArray.push(mediumBall1f8);
this.addChild(mediumBall1f8);
mediumBall1f8.ballX = 3;
mediumBall1f8.ballY = 8;
mediumBall1f8.x = 400;
mediumBall1f8.y = 240;

var mediumBall1f9:Ball = new Ball  ;
ballArray.push(mediumBall1f9);
this.addChild(mediumBall1f9);
mediumBall1f9.ballX = 3;
mediumBall1f9.ballY = 8;
mediumBall1f9.x = 400;
mediumBall1f9.y = 110;


//FLOOR
var downArray:Array = new Array();

for (var dA:int = numChildren - 1; dA>= 0; dA--)
{
    var childdA:DisplayObject = getChildAt(dA);
    if (childdA.name == "downfloor")
    {
        downArray.push(MovieClip(childdA));
    }
}

var upArray:Array = new Array();

for (var uA:int = numChildren - 1; uA>= 0; uA--)
{
    var childuA:DisplayObject = getChildAt(uA);
    if (childuA.name == "upfloor")
    {
        upArray.push(MovieClip(childuA));
    }
}

var rightArray:Array = new Array();

for (var rA:int = numChildren - 1; rA>= 0; rA--)
{
    var childrA:DisplayObject = getChildAt(rA);
    if (childrA.name == "rightfloor")
    {
        rightArray.push(MovieClip(childrA));
    }
}

var leftArray:Array = new Array();

for (var lA:int = numChildren - 1; lA>= 0; lA--)
{
    var childlA:DisplayObject = getChildAt(lA);
    if (childlA.name == "leftfloor")
    {
        leftArray.push(MovieClip(childlA));
    }
}

//USE ONCE
stageclear.visible = false;
stageclear.gotoAndStop(1);

stage.addEventListener(Event.ENTER_FRAME,ballLoop);
function ballLoop(evt:Event)
{
    //BALL
    for (var j = 0; j<ballArray.length; j++)
    {

        var ball:Ball = ballArray[j] as Ball;
        ball.ballY--;
        ball.y -=  ball.ballY;
        ball.x -=  ball.ballX;
        if (player.hitTestObject(ball))
        {

            ball.y = 600;
        }
        if(ball.x - ball.width/2 < 0)
        {
            ball.ballX = -3;
        }
        if(ball.x + ball.width/2 > 800)
        {
            ball.ballX = 3;
        }
        if(ball.y + ball.height/2 > 384.45)
        {
            ball.ballY = 20;
        }
        if(ball.y - ball.height/2 < 0)
        {
            ball.ballY = -2;
        }
            for (var d = 0; d<downArray.length; d++)
            {
                var down:DownFloor = downArray[d] as DownFloor;
                if (ball.hitTestObject(down))
                {
                    ball.ballY = 20;
                }
            }
            for (var r = 0; r<rightArray.length; r++)
            {
                    var right:RightFloor = rightArray[r] as RightFloor;
                    if (ball.hitTestObject(right))
                    {
                        ball.ballX = 3;
                    }
            }
            for (var l = 0; l<leftArray.length; l++)
            {
                var left:LeftFloor = leftArray[l] as LeftFloor;
                if (ball.hitTestObject(left))
                {
                    ball.ballX = -3;
                }
            }
            for (var u = 0; u<upArray.length; u++)
            {
                var up:UpFloor = upArray[u] as UpFloor;
                if (ball.hitTestObject(up))
                {
                    ball.ballY = -2;
                }
            }
        if (ball.y >= 600)
        {
            ball.parent.removeChild(ball);
            ballArray.splice(j,1);
        }
        if (ballArray.length <= 0)
        {
            stageclear.visible = true;
            stageclear.gotoAndPlay(1);
        }
    }
    if(stageclear.currentFrame == stageclear.totalFrames)
    {
        stage.removeEventListener(Event.ENTER_FRAME,ballLoop);
        MovieClip(this.root).gotoAndPlay(1, "Scene 2");
    }
}

Answer 1

发生这种情况的原因是

之所以会发生这种情况，是因为只有当MC重叠时，hitTest才为真。如果你能更仔细地观察，你会发现这发生在所有的球上(只是有些球比另一些球更明显)。

据我所知唯一的解决办法

进行您自己的碰撞检测。

它可能看起来像这样：

function collisionTest (mc1:MovieClip,mc2:MovieClip){
    // test if mc1 is going to hit mc2's left side *on the next frame*
    if (mc1.x + mc1._xSpeed + mc1.width>= mc2.x){
        mc1.x = mc2.x; // this may cause a momentary pause... The ball may seem to stick to the wall for a frame... If this is a problem let me know and I'll show you how to fix that
        mc1._xSpeed *= -1;
    }
    // test if mc1 is going to hit top edge of mc2 *on the next frame*
    if (mc1.y + mc1._ySpeed + mc1.height >= mc2.y){
         mc1.y = mc2.y; // same possible sticking here
         mc1._ySpeed *= -1;
    }
}

备注

• 要使用此功能，MC的注册点应位于左上角(这是默认设置)。此外，我的代码只适用于object 1向下移动，与object2顶部碰撞，或者object 1向右移动与object 2.
• _xSpeed和_ySpeed的左侧碰撞，这些都是您需要添加到您的ball类的属性，并使用该属性来指示球的运动。这是关键的：它允许你向前看，展望未来，看看球是否会在下一帧中撞到墙上，如果是，现在运行碰撞结果，而不是在它们重叠后运行。

如果球正在向左移动，并且希望它检测与墙的右边缘的碰撞，则需要添加类似的代码。此外，如果球正在向上移动，并且您想要检测与墙底部的碰撞，也可以使用

不要忘记包括调整墙的宽度或球的宽度(因为我们使用的是边界框左上角的注册点)