java - 我的碰撞检测不适用于 Java 图形

Question

int border=30;
boolean balldown=true;
boolean ballright=true;
int bounce=0;


public void moveBall(){



    if (balldown==true){
        //y++; 
        rect3.b++;

    }


    if (balldown==false){
        y--;
        rect3.b--;
    }
    //y==getHeight()-border
    if(rect3.b==getHeight()-border){


        balldown=false;
        bounce++;
    }
    //y==0
    if(rect3.b==0){


        balldown=true;
        bounce++;
    }

    if (ballright==true){
        x++; 
        rect3.a++;
    }

    if (ballright==false){
        x--;
        rect3.a--;
    }
    //x==getWidth
        if(colision==true){


        ballright=false;
        bounce++;

    }
    colision=false;

    //x==0
    //rect3.bounds2()==rect1.bounds()
    if(colision==true){


        ballright=true;
        bounce++;

    }

    }
   /* if(rect3.a==getWidth()){
        ballright=false;
    }
    if(rect3.a==0){
        ballright=true;
    }*/
}

   // int a=0;
   // int b=0;
    //int width=30;
   // int height=200;

    rect rect1;
    rect rect2;
    rect rect3;
    Timer time;
    boolean colision=false;

    public Pong() {
        rect1 = new rect(0,0);
        rect2 = new rect(977,0);
        rect3=new rect(40,40);
        time=new Timer(5,this);
        time.start();
    }




public class rect{
    int a,b;

    public rect(int startA, int startB){
        a=startA;
        b=startB;
    }

    public Rectangle bounds(){

    return (new Rectangle(a,b,30,200));
}
    public Rectangle bounds2(){

    return (new Rectangle(a,b,30,30));
    }
}




@Override
public void paint(Graphics g){


    super.paint(g);

    Graphics2D g2d=(Graphics2D) g;
    g.setColor(Color.BLACK);
    g.fillRect(0, 0, 1080, 760);


    g2d.setColor(Color.WHITE);
   // g.fillOval(x, y, 30, 30);
   g2d.fillRect(rect3.a, rect3.b, 30, 30);

    g2d.setColor(Color.WHITE);
    g2d.fillRect(rect1.a, rect1.b, 30, 200);

    g2d.setColor(Color.WHITE);
    g2d.fillRect(rect2.a, rect2.b, 30, 200);

    g2d.fillRect(520, 0, 10, 760);

    if (colision==true)
        g.setFont(new Font("TimesRoman", Font.PLAIN, 20));
        g.drawString("Colision",350, 50);



     g.setFont(new Font("TimesRoman", Font.PLAIN, 20));

        g.setColor(Color.WHITE);

        g.drawString("BOUNCES: "+bounce, 40, 20);
}


public void colision(){

    Rectangle rectangle1=rect1.bounds();
    Rectangle rectangle2=rect2.bounds();
    Rectangle rectangle3=rect3.bounds2();

        if(rectangle3.intersects(rectangle1))
            colision=true;
        else
            colision=false;

        if(rectangle3.intersects(rectangle2))
            colision=true;

        else
            colision=false;


}
@Override
public void actionPerformed(ActionEvent e){
        moveBall();
        colision();
        repaint();

所以基本上我的 if 语句使用 intersects 永远不会在我的球击中侧面的矩形时返回 true。同样在我的 moveball 方法中，只要这些边界相遇，它就应该在另一个方向“反弹”，但它不起作用，甚至只是通过低谷而没有碰撞检测。我执行错了吗？当我检查 system.out.print 时，它会以每秒 2 次甚至更快的速度不断返回消息。我是一个 java 初学者，不要因为明显的错误和糟糕的结构而对我大喊大叫。谢谢

标签： javacollision-detection