java - 需要有关 Breakout 游戏碰撞错误的帮助

Question

这是 12 年级的 OPP 作业。

目前我遇到一个问题，球偶尔会进入方 block 而不是反射。

这是我的代码:

主要如何检查球是否击中方 block :

public void theBall(){
    //System.out.println(blocks.size());
    if(!started){
        balls.get(0).withPaddle(paddle.returnX());
    }
    if(started){
        for(int i=0;i<balls.size();i++){
            if(balls.get(i).returnX()>=0 && balls.get(i).returnX()<=800 && balls.get(i).returnY()>=0){
                balls.get(i).move();
            }
            if(balls.get(i).returnX()+balls.get(i).returnDx()<= 0){
                balls.get(i).collide(1);//collide with left wall
            }
            if(balls.get(i).returnX()+10+balls.get(i).returnDx() >= 800){
                balls.get(i).collide(2);//collide with right wall
            }
            if(balls.get(i).returnY()-balls.get(i).returnDy() <= 0){
                balls.get(i).collide(3);//collide with up wall
            }

            if(paddle.returnX() < balls.get(i).returnX() && balls.get(i).returnX()< paddle.returnX()+paddle.returnSize() && balls.get(i).returnY()-balls.get(i).returnDy() >= 545){//fix this && balls.get(i).returnY()-balls.get(i).returnDy() <= 560
                balls.get(i).collidePaddle(balls.get(i).returnX()-paddle.returnX());//collide with paddle
                //System.out.println(ball.returnDy());
            }
            for(int j=0;j<blocks.size();j++){
                //blocks.get(j).getHit(balls.get(i));
                if(balls.get(i).returnX()+10+balls.get(i).returnDx() >= blocks.get(j).returnX() && balls.get(i).returnX()+10+balls.get(i).returnDx() <= blocks.get(j).returnX()+5 && balls.get(i).returnY() >= blocks.get(j).returnY() && balls.get(i).returnY() < blocks.get(j).returnY()+50){
                    if(!blocks.get(j).returnHit()){
                        balls.get(i).collide(2);//collide with right wall (block's left)
                        blocks.get(j).getHit(balls.get(i));
                        System.out.println("boiboiboiboibo1");
                    }
                }

                if(balls.get(i).returnX()+balls.get(i).returnDx() <= blocks.get(j).returnX()+50 && balls.get(i).returnX()+balls.get(i).returnDx() >= blocks.get(j).returnX()+45 && balls.get(i).returnY() >= blocks.get(j).returnY() && balls.get(i).returnY() < blocks.get(j).returnY()+50){
                    if(!blocks.get(j).returnHit()){
                        balls.get(i).collide(1);//collide with left wall (block's right)
                        blocks.get(j).getHit(balls.get(i));
                        System.out.println("boiboiboiboibo2");
                    }
                }

                if(balls.get(i).returnX() >= blocks.get(j).returnX() && balls.get(i).returnX() < blocks.get(j).returnX()+50 && balls.get(i).returnY()-balls.get(i).returnDy() <= blocks.get(j).returnY()+50 && balls.get(i).returnY()-balls.get(i).returnDy() >= blocks.get(j).returnY()+45){
                    if(!blocks.get(j).returnHit()){
                        balls.get(i).collide(3);//collide with up wall (block's bottom)
                        blocks.get(j).getHit(balls.get(i));
                        System.out.println("boiboiboiboibo3");
                    }
                }
                if(balls.get(i).returnX() >= blocks.get(j).returnX() && balls.get(i).returnX() < blocks.get(j).returnX()+50 && balls.get(i).returnY()+10-balls.get(i).returnDy() >= blocks.get(j).returnY() && balls.get(i).returnY()+10-balls.get(i).returnDy() <= blocks.get(j).returnY()+5){
                    if(!blocks.get(j).returnHit()){
                        balls.get(i).collide(4);//collide with down wall (block's top)
                        blocks.get(j).getHit(balls.get(i));
                        System.out.println("boiboiboiboibo4");
                    }
                }
            }
            for(int j=0;j<specialBlocks.size();j++){
                if(balls.get(i).returnX()>=specialBlocks.get(j).returnX() && balls.get(i).returnX()<=specialBlocks.get(j).returnX()+100 && balls.get(i).returnY()>=specialBlocks.get(j).returnY() && balls.get(i).returnY()<=specialBlocks.get(j).returnY()+100){
                    oneAndThreeBalls(i, j);
                    balls.get(i).changeType(j);
                }
            }
        }
    }
}

球如何反射:

public void collide(int collideWith){
    if(collideWith==1){//collide with left wall
        if(90<direction && direction<180){
            direction = 180-direction;
        }
        if(180<direction && direction<270){
            direction = 540-direction;
        }
    }
    if(collideWith==2){//collide with right wall
        if(0<direction && direction<90){
            direction = 180-direction;
        }
        if(270<direction && direction<360){
            direction = 540-direction;
        }
    }
    if(collideWith==3){//collide with up wall
        direction = 360-direction;
    }
    if(collideWith==4){//collide with down wall
        direction = 360-direction;

    }
}

我很清楚该错误是由于边界的双重检查造成的。当球位于方 block 的角落时，就会发生这种情况。但这是我能想到的检查球的位置是否反射(reflect)的唯一方法。我有什么想法可以修复这个错误吗？谢谢。

Answer 1

为什么不这样做:

1) 弹跳后，您停止检查该球的碰撞，直到游戏的下一个周期。这样球每次跳动只能弹跳一次。

2) 与方 block 碰撞并弹开后，您会忽略该特定方 block 与球之间的碰撞，直到球不与方 block 重叠为止。这样，球就不会在相同的撞击下从木 block 上虚假地反弹两次。

顺便说一句，您有很多复制和粘贴的代码，只有数字等方面的细微变化。如果您找到一种方法来重述它，即使用稍微不同的参数不断调用的方法，您的代码将变得更加整洁，问题的基本对称性也将更加明显。