Java中两个图像之间的碰撞检测

问题描述

我在写作的游戏中显示了两个角色，玩家和敌人。定义如下：

I have two characters displayed in a game I am writing, the player and the enemy. defined as such:

public void player(Graphics g) {
    g.drawImage(plimg, x, y, this);
}

public void enemy(Graphics g) {
    g.drawImage(enemy, 200, 200, this);
}

然后跟注：

player(g);
enemy(g);

我可以用键盘移动玩家（），但我在尝试时不知所措检测两者之间的碰撞。很多人都说使用矩形，但作为一个初学者，我看不出如何将它链接到我现有的代码中。任何人都可以为我提供一些建议吗？

I am able to move player() around with the keyboard, but I am at a loss when trying to detect a collision between the two. A lot of people have said to use Rectangles, but being a beginner I cannot see how I would link this into my existing code. Can anyone offer some advice for me?

推荐答案

我认为你的问题是你没有为你的播放器使用优秀的OO设计敌人。创建两个类：

I think your problem is that you are not using good OO design for your player and enemies. Create two classes:

public class Player
{
    int X;
    int Y;
    int Width;
    int Height;

    // Getters and Setters
}

public class Enemy
{
    int X;
    int Y;
    int Width;
    int Height;

    // Getters and Setters
}

你的玩家应该有X，Y，Width和Height变量。

Your Player should have X,Y,Width,and Height variables.

你的敌人也应该。

在你的游戏中循环，做这样的事情（C＃）：

In your game loop, do something like this (C#):

foreach (Enemy e in EnemyCollection)
{
    Rectangle r = new Rectangle(e.X,e.Y,e.Width,e.Height);
    Rectangle p = new Rectangle(player.X,player.Y,player.Width,player.Height);

    // Assuming there is an intersect method, otherwise just handcompare the values
    if (r.Intersects(p))
    {
       // A Collision!
       // we know which enemy (e), so we can call e.DoCollision();
       e.DoCollision();
    }
}

为了加快速度，请不要费心检查是否敌人的坐标在屏幕外。

To speed things up, don't bother checking if the enemies coords are offscreen.

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