关于java：mouseMoved方法中的碰撞检测

Collision detection in mouseMoved method

我正在用java创建一个游戏。在其中，您控制一个跟随鼠标的正方形。我想为正方形实现碰撞检测，使其在 JFrame 内略微停止，而不是在边缘处。使用箭头键执行此操作非常容易，但我无法使用 mouseMoved 方法解决。这是 mouseMoved 方法所在的代码：

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public void mouseMoved(MouseEvent e){

repaint();
if(e.getX() <= 0)
playerX = 0;
if(e.getX() >= 300)
playerX = 500;
if(e.getY() <= 0)
playerY = 0;
if(e.getY() >= 300)
playerY = 500;
else
playerX = e.getX()-25;
playerY = e.getY()-25;
repaint();

}

这是创建正方形的代码：

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public void paintComponent(Graphics g) {

Rectangle player = new Rectangle(playerX, playerY, 50, 50);
g.setColor(Color.blue);
g.fillRect(player.x, player.y, player.width, player.height);
repaint();

}

我不认为你会需要这个，但以防万一，这里是 GamePanel 类的所有代码，它用作 Main 类中我的 JFrame 的面板。如果您需要 Main 课程，请告诉我，但我怀疑您会：

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package main;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JPanel;

public class GamePanel extends JPanel implements Runnable{

//Global variables

//Double buffering
private Image dbImage;
private Graphics dbg;

//JPanel variables
static final int GWIDTH = 500, GHEIGHT = 500;
static final Dimension gameDim = new Dimension(GWIDTH, GHEIGHT);

//Game variable
private Thread game;
private volatile boolean running = false;
public boolean mouseClicked = false;

//Character variables
int playerX = 150, playerY = 150;

public class Mouse extends MouseAdapter{

public void mousePressed(MouseEvent e){

mouseClicked = true;

}

public void mouseReleased(MouseEvent e){

mouseClicked = false;

}

public void mouseMoved(MouseEvent e){

repaint();
if(e.getX() <= 0)
playerX = 0;
if(e.getX() >= 300)
playerX = 500;
if(e.getY() <= 0)
playerY = 0;
if(e.getY() >= 300)
playerY = 500;
else
playerX = e.getX()-25;
playerY = e.getY()-25;
repaint();

}
}

public GamePanel(){

addMouseMotionListener(new Mouse());
setPreferredSize(gameDim);
setBackground(Color.BLUE);
setFocusable(true);
requestFocus(true);

}

public void run(){

while(running){

}

}

public void addNotify(){

super.addNotify();
startGame();

}

private void startGame(){

if(game == null || !running){

game = new Thread(this);
game.start();
running = true;

}

}

public void stopGame(){

if(running){

running = false;

}

//Paint method

}

public void paint(Graphics g){

dbImage = createImage(getWidth(), getHeight());
dbg = dbImage.getGraphics();
paintComponent(dbg);
g.drawImage(dbImage, 0, 0, this);

}

public void paintComponent(Graphics g) {

Rectangle player = new Rectangle(playerX, playerY, 50, 50);
g.setColor(Color.blue);
g.fillRect(player.x, player.y, player.width, player.height);
repaint();

}

private void log(String s){

System.out.println(s);

}

}

感谢您的帮助。如果您需要任何东西，请告诉我。