Java 颜色碰撞检测

Question

我正在制作一个 2d 平台游戏，它接收 "levels" 的几张预制图像并将它们随机插入到列表中。游戏永无止境，因此它只会根据需要不断添加更多图像。

我的角色在图像之间移动时遇到问题，因为当这个人到达一张图像的末尾时，它会抛出：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: Coordinate out of bounds!
at sun.awt.image.ByteInterleavedRaster.getDataElements(ByteInterleavedRaster.java:318)
at java.awt.image.BufferedImage.getRGB(BufferedImage.java:918)
at GamePanel.fall(run.java:197)
at run.actionPerformed(run.java:41)
at javax.swing.Timer.fireActionPerformed(Timer.java:313)
at javax.swing.Timer$DoPostEvent.run(Timer.java:245)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
at java.awt.EventQueue.access0(EventQueue.java:97)
at java.awt.EventQueue.run(EventQueue.java:697)
at java.awt.EventQueue.run(EventQueue.java:691)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain.doIntersectionPrivilege(ProtectionDomain.java:75)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

但是我的图片是 1000 x 600 像素宽，它说它超出了 1000,413 的范围。

这是错误部分的代码：

public void getActImg(){
    int tmp=0;
    for(int i=0;i<inUse.size();i++){
        tmp+=inUse.get(i).getWidth();
        System.out.println(imgPix);
        if(tmp/imgPix>=0){//int divide by width of all the pictures to find current img
            actImg=inUse.get(i);
            System.out.println(i);
            break;
        }
    }
}
public void fall(){
    if(posY+foot>getHeight()){
        die();
    }
    System.out.println((totDist+posX)%imgPix+","+(posY+foot));
    if(actImg.getImg().getRGB((totDist+posX)%imgPix,posY+foot)==Color.WHITE.getRGB()){
        posY+=vy;
        vy+=g;
        onGround=false;
    }
    else{
        onGround=true;
        if(vy>3){
            posY-=vy;
        }
        vy=0;
    }
}

我在互联网上搜索过任何形式的帮助，但他们只谈论如何插入重力或使用盒子碰撞。我有重力但不了解盒子碰撞。这就是我使用颜色的原因。任何帮助将不胜感激

谢谢

Answer 1

图像就像二维数组。位置 (1000,413) 在图像之外，因为索引从 0 开始到 999。在某个位置获取颜色时，确保该位置小于图像的宽度或高度，不小于或等于。

在 public void fall() 中：

int x = (totDist + posX) % imgPix; // NOTE: I am not sure what imgPix is or why you are modding the value by it.
int y = posY + foot;


if (x > 0 && x < actImg.getWidth() && y > 0 && y < actImg.getHeight()) {
    if (actImg.getImg().getRGB(x, y) == Color.WHITE.getRGB()) {
        posY += vy;
        vy += g;
        onGround = false;
    }
}

Java 颜色碰撞检测

Java colour collision detection

java

bufferedimage