Question

试图编写java pacman.i使用bufferedimage来存储迷宫。要检查pacman与墙壁的碰撞，我使用2d int数组，值0表示空白空间＆amp; pacman可以移过它，1是wall.pacman对象应该在按键上一次移动1个方块，停止在keyrelease上。但是pacman没有正确移动，它有时会移动到墙上的方块上，有时它会移动然后完全停止，即使它在空方块中也是如此。不知道我哪里出错了。我用了下面的课程。请有人帮忙。

public class Map extends JPanel implements Runnable{

private int TILE_W=15; //divide map into 15x15 tiles
private int TILE_H=20; //there will be 20 tiles along width and 15 along height,total of 300 tiles

private Image tile; // 15x15 png image

private BufferedImage img; //stores maze image

private long DELAY=50;

private Pacman pacman;

private int[][] mapdata={{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}, 
                         {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1},
                         {1,0,0,1,1,1,1,0,1,0,1,1,1,1,1,1,1,1,1,1},
                         {1,0,0,1,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1},
                         {1,0,0,1,0,0,1,0,1,0,1,0,1,1,1,1,1,1,0,1},
                         {1,0,0,1,1,1,1,0,1,0,1,0,1,0,0,0,0,1,0,1},
                         {1,0,0,0,0,0,0,0,1,0,1,0,1,0,0,0,0,1,0,1},
                         {1,0,0,1,1,1,1,0,1,0,1,0,1,1,1,1,1,1,0,1},
                         {1,0,0,1,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,1},
                         {1,0,0,1,0,0,1,0,1,0,1,0,1,1,1,1,1,1,0,1},
                         {1,0,0,1,0,0,1,0,1,0,1,0,1,0,0,0,0,1,0,1},
                         {1,0,0,1,0,0,1,0,1,0,1,0,1,0,0,0,0,1,0,1},
                         {1,0,0,1,1,1,1,0,1,0,1,0,1,1,1,1,1,1,0,1},
                         {1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1},
                         {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
                        };

public Map(){
  ImageIcon ict=new ImageIcon(this.getClass().getResource("tile.png"));
  tile=ict.getImage();
  addKeyListener(new KbListener());
  setFocusable(true);
  setDoubleBuffered(true);
  pacman=new Pacman(mapdata);
  img=new BufferedImage(350,350,BufferedImage.TYPE_INT_ARGB);
  Graphics2D g2D=(Graphics2D) img.getGraphics();
  for(int x=0;x<TILE_W;x++)
    for(int y=0;y<TILE_H;y++){
            if(mapdata[x][y]==1)
                g2D.drawImage(tile,y*15,x*15,this);
    }
  Thread t=new Thread(this);
  t.start();
}

@Override
public void paintComponent(Graphics g){
    super.paintComponent(g);
    Graphics2D g2D=(Graphics2D) g;
    g2D.drawImage(img,0,0,this);
    g2D.drawImage(pacman.getImage(),pacman.getX(),pacman.getY(),this);
    Toolkit.getDefaultToolkit().sync();
    g.dispose();
}

public void run() {
    // TODO Auto-generated method stub
    while(true){
     repaint();
     pacman.move();
     try {
        Thread.sleep(DELAY);
     } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
     }
   }
}

private class KbListener extends KeyAdapter{
    public void keyReleased(KeyEvent e){
        pacman.keyReleased(e);
    }

    public void keyPressed(KeyEvent e){
        pacman.keyPressed(e);
    }
}

}


public class Pacman {
private Image pacman;
private int x,y;
private int dx,dy;

private int[][] mapdata;
private int mapx,mapy;

public Pacman(int[][] mapdata){
    ImageIcon icp=new ImageIcon(this.getClass().getResource("pacman.png"));
    pacman=icp.getImage();
    x=30;
    y=15;
    dx=0;
    dy=0;
    mapx=2;
    mapy=1;
    this.mapdata=mapdata;
}

public void move(){
    x+=dx;
    y+=dy;  
}

public Image getImage(){
    return pacman;
}

public int getX(){
    return x;
}

public int getY(){
    return y;
}

public void keyPressed(KeyEvent e){
    int k=e.getKeyCode();
    if(k==KeyEvent.VK_LEFT){
        mapx=(x-15)/15;
        if(mapdata[mapx][mapy]==1)
            dx=0;
        else dx=-15; 
    }
    if(k==KeyEvent.VK_RIGHT){
        mapx=(x+15)/15;
        if(mapdata[mapx][mapy]==1)
            dx=0;
        else dx=15;
    }
    if(k==KeyEvent.VK_UP){
        mapy=(y-15)/15;
        if(mapdata[mapx][mapy]==1)
            dy=0;
        else dy=-15;
    }
    if(k==KeyEvent.VK_DOWN){
        mapy=(y+15)/15;
        if(mapdata[mapx][mapy]==1)
            dy=0;
        else dy=15;
    }
}

public void keyReleased(KeyEvent e){
    int k=e.getKeyCode();
    if(k==KeyEvent.VK_LEFT)
        dx=0;
    if(k==KeyEvent.VK_RIGHT)
        dx=0;
    if(k==KeyEvent.VK_UP)
        dy=0;
    if(k==KeyEvent.VK_DOWN)
        dy=0;
}
}

Answer 1

在这里看看你的变量：

if(k==KeyEvent.VK_LEFT){
    mapx=(x-15)/15;
    if(mapdata[mapx][mapy]==1)
        dx=0;
    else dx=-15; 
}

您在哪些事件之间重置mapx和mapy？我不认为你在任何地方都这样做。那么后续事件之间mapx和mapy会发生什么？例如，如果向左移动并撞墙，然后向上移动，您的mapx现在仍然卡在墙上。

不要使用字段，因为您没有在其他地方使用它们。只需在方法中创建变量即可。 dx和dy存在类似的潜在问题，如果在更改路线之前碰到墙壁，则只会重置为0 。

int mapx = x / 15; int mapy = y / 15; if (k == KeyEvent.VK_LEFT) { mapx--; if (mapx < 0 || mapdata[mapx][mapy] == 1) dx = 0; else dx =- 15; dy = 0; } else if (k == KeyEvent.VK_RIGHT) { mapx++; if (mapx > mapdata.length - 1 || mapdata[mapx][mapy] == 1) dx = 0; else dx = 15; dy = 0; } else if (k == KeyEvent.VK_UP) { mapy--; if (mapy < 0 || mapdata[mapx][mapy] == 1) dy = 0; else dy =- 15; dx = 0; } else if (k == KeyEvent.VK_DOWN) { mapy++; if (mapy > mapdata[mapx].length - 1 || mapdata[mapx][mapy] == 1) dy = 0; else dy = 15; dx = 0; }

java pacman墙碰撞无法正常工作

1 个答案: