迷宫2D java游戏中的碰撞检测

Question

我正在尝试制作我的第一个Pacman游戏，但我遇到了一堵我自己似乎无法打破的墙：(

这是关于如何在我的游戏中检测碰撞，所以步行者不能穿过障碍物/墙壁。我已经使它不能去屏幕外与此代码：

    if (pacman_x < 27) {
        pacman_velX = 0;
        pacman_x = 27;
    }
    if (pacman_y < 27) {
        pacman_velY = 0;
        pacman_y = 27;
    }
    if (pacman_x > 621) {
        pacman_velX = 0;
        pacman_x = 621;
    }
    if (pacman_y > 513) {
        pacman_velY = 0;
        pacman_y = 513;
    }

，但如果我在屏幕中间的电路板上有一个矩形，我不知道如何编程，这样它就会在墙前停止。

我需要阻止我的pacman移动到竞技场内的墙上，如你所见（左上方的矩形）

我的Board类代码：

public class Board extends JPanel implements ActionListener, KeyListener {

private Timer timer;
private Map m;
private Pacman p;
int pacman_x = 27, pacman_y = 27, pacman_velX = 0, pacman_velY = 0; 

public Board() 
{
    m = new Map();
    p = new Pacman();
    timer = new Timer(10, this);
    timer.start();
    addKeyListener(this);
    setFocusable(true);
    setFocusTraversalKeysEnabled(false); // So we can't use shift 
}

public void actionPerformed(ActionEvent e) {
    pacman_x = pacman_x + pacman_velX;
    pacman_y = pacman_y + pacman_velY;
    repaint();          

    if (pacman_x < 27) {
        pacman_velX = 0;
        pacman_x = 27;
    }
    if (pacman_y < 27) {
        pacman_velY = 0;
        pacman_y = 27;
    }
    if (pacman_x > 621) {
        pacman_velX = 0;
        pacman_x = 621;
    }
    if (pacman_y > 513) {
        pacman_velY = 0;
        pacman_y = 513;
    }

    if (pacman_x >= 150 && pacman_y >= 27) {
        pacman_velX = 0;
        pacman_x = 27;
    }

}

public void paint(Graphics g) {
    super.paint(g);

    Graphics2D g2d = (Graphics2D) g;

    for(int y = 0; y < 21; y++) {
        for (int x = 0; x < 25; x++) {
            if (m.getMap(x, y).equals("b")) {
                g.drawImage(m.getBarrier(), x * 27, y * 27, null);
            }
            if (m.getMap(x, y).equals("s")) {
                g.drawImage(m.getSpace(), x * 27, y * 27, null);
            }
        }

    }

    // Place pacman on board        
    g.drawImage(p.getPacman(), pacman_x , pacman_y, null);  

    // Create Rectangles barriers
    Rectangle r1 = new Rectangle(150, 27, 27, 27);

    g2d.setColor(new Color(63, 72, 204, 250));      
    g.fillRect(r1.x, r1.y, 27, 27);

    // Sets Color on lives
    int lives = 3;
    g2d.setColor(new Color(255, 0, 0, 250));
    g2d.drawString("Lives left: " + lives, 20, 20);

    // Sets Color on Scoreboard text
    int point = 0;      
    g2d.setColor(new Color(255, 0, 0, 250));
    g2d.drawString("Score: " + point, 20, 550);
}

@Override
public void keyPressed(KeyEvent e) {

    int pacman_direction = e.getKeyCode();

    if (pacman_direction == KeyEvent.VK_LEFT) {

        pacman_velX = -3;
        pacman_velY = 0;

    }       

    if (pacman_direction == KeyEvent.VK_UP) {

        pacman_velX = 0;
        pacman_velY = -3;           

    }

    if (pacman_direction == KeyEvent.VK_RIGHT) {

        pacman_velX = 3;
        pacman_velY = 0;

    }

    if (pacman_direction == KeyEvent.VK_DOWN) {

        pacman_velX = 0;
        pacman_velY = 3;    

    }

}

希望有人能告诉我该怎么做...似乎找不到一个简单的例子教程在互联网上，解释我想让它做的事情！

Answer 1

这并不完全是关于在java中制作pac man，而是关于一个2d平台，它在2d空间中具有所有碰撞映射，以及如何创建和添加对象，例如包含动画的玩家和敌人，您应该会发现它总体上很有用：https://www.youtube.com/watch?v=9dzhgsVaiSo

注意：你需要自己处理鬼的AI:D

免责声明我没有制作这些视频，我只是发现它们非常有用。