Question

我为这个正在进行的简单游戏制作了这个矩形碰撞系统，但是它运行不正常。它仅在玩家的左下角像素与对象碰撞时才会记录碰撞，我无法弄清楚原因。提前感谢您的帮助。

public static boolean collision(int playerX, int playerY, int playerWidth, int playerHeight,
        int obstacleX, int obstacleY, int obstacleWidth, int obstacleHeight){

    if (coordinateWithinRect(playerX, playerY, obstacleX,
            obstacleY, obstacleWidth, obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX - playerWidth,
            playerY, obstacleX, obstacleY, obstacleWidth,
            obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX - playerWidth,
            playerY + playerHeight, obstacleX, obstacleY,
            obstacleWidth, obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX, playerY
            + playerHeight, obstacleX, obstacleY, obstacleWidth,
            obstacleHeight)) {
        return true;
    } else {
        return false;
    }
}


private static boolean coordinateWithinRect(int xCoord, int yCoord, int xRect, int yRect, int width, int height) {
    if (xCoord > xRect && xCoord < (xRect + width) && yCoord < yRect && yCoord > (yRect - height)) {
        return true;
    } else {
        return false;
    }
}

Answer 1

在你的功能coordinateWithinRect中，您可以为障碍物指定宽度和高度，但不能为您的玩家指定。这是故意的吗，我的意思是你的玩家没有任何尺寸，或者他们被认为不重要？

无论如何，根据你对碰撞的定义的总体思路来判断，我猜玩家被认为是在障碍物的矩形内部与障碍碰撞，对吧？所以，你应该检查是否

playerX位于obstacleX-obstacleWidth/2内，obstacleX+obstacleWidth/2位于
playerY同时位于obstacleY-obstacleHeight/2和obstacleY+obstacleHeight/2内。

你的功能应该是：

private static boolean coordinateWithinRect(int xPunkt, int yPunkt, int xRect, int yRect, int bredd, int höjd) {
    if (playerX > (obstacleX-obstacleWidth/2) && playerX < (obstacleX+obstacleWidth/2) && playerY > (obstacleY-obstacleHeight/2) && playerY < (obstacleY+obstacleHeight/2)) {
        return true;
    } else {
        return false;
    }
}

您不进行这些检查以确定您在此处有问题或者我遗失了什么？

Answer 2

我设法自己修复了代码，我会解释这个问题并在下面修复，因为任何人都有相同或类似的问题。

问题在于我使用了常规二维坐标系的想法，其中X向右增加，Y增加了向上。在java中它是相反的。固定代码如下所示：

public static boolean collision(int playerX, int playerY, int playerWidth, int playerHeight,
        int obstacleX, int obstacleY, int obstacleWidth, int obstacleHeight){

    if (coordinateWithinRect(playerX, playerY, obstacleX,
            obstacleY, obstacleWidth, obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX + playerWidth,
            playerY, obstacleX, obstacleY, obstacleWidth,
            obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX + playerWidth,
            playerY - playerHeight, obstacleX, obstacleY,
            obstacleWidth, obstacleHeight)) {
        return true;
    } else if (coordinateWithinRect(playerX, playerY
            - playerHeight, obstacleX, obstacleY, obstacleWidth,
            obstacleHeight)) {
        return true;
    } else {
        return false;
    }
}




private static boolean coordinateWithinRect(int xCoord, int yCoord, int xRect, int yRect, int width, int height) {
    if (xCoord > xRect && xCoord < (xRect + width) && yCoord < yRect && yCoord > (yRect - height)) {
        return true;
    } else {
        return false;
    }
}

矩形碰撞检测系统不工作

2 个答案: