Question

无法在线找到任何有用的教程，所以我尝试了自由式算法来解决这个问题。

基本上，我已经将播放器（主角）和平台（播放器可能会发生碰撞的磁贴）建模为矩形为了碰撞检测。在我的代码中，playerRect是表示播放器的矩形，getRect（）是表示平台的矩形。

现在我的播放器只能从左向右移动，因此他只能与平台的3个侧面（左侧，上侧和下侧）发生碰撞。我设法检测到平台顶部和底部的碰撞，但由于某种原因，我无法检测到左侧的碰撞。

如果有人可以查看我的代码并可能找到我出错的地方，我们将非常感激。

public class Platform extends GameObject {
...
public void update() {
    // Rectangle of player
    playerRect = player.getRect();
    //A boolean that checks whether or not player's rectangle 
    //and platform's rectangle overlap
    isOverlapping = playerRect.overlaps(getRect());

    if (isOverlapping) {

        // If the player hits the bottom part of the platform, 
        // have gravity pull him down
        if ((playerRect.getX() > getRect().getX() && 
             playerRect.getX() < getRect().getX() +   
             getRect().getWidth()) && 
             playerRect.getY() > getRect().getY()); {

                player.setySpeed(player.getGravity());
                // If the player is on a platform or on the ground, 
                // allow him to jump
                if (playerOnPlatform() || player.onGround()) {
                    player.setAllow("true", "jump");
                } else {
                    player.setAllow("false", "jump");
                }
            }

        // If the player is on the top part of the platform, 
        // set his ySpeed to 0 so he remains on the platform rather 
        // than fall due to gravity
        if ((playerRect.getX() > getRect().getX() && 
             playerRect.getX() < getRect().getX() + 
             getRect().getWidth()) && 
             playerRect.getY() < getRect().getY()) {

            player.setySpeed(0);
            // If the player is on a platform or on the ground, allow him to jump
            if (playerOnPlatform() || player.onGround()) {
                player.setAllow("true", "jump");
            } else {
                player.setAllow("false", "jump");
            }

           // If the player hits the side of the platform, 
           // set his xSpeed to 0 so that he does not go through the platform
            if(playerRect.getX() > getRect().getX() && 
              (playerRect.getY() > getRect().getY() && 
               playerRect.getY() < getRect().getY() + 
               getRect().getHeight())) {
                player.setySpeed(20);
            }
        }
...
}

提前感谢任何输入

Answer 1

如果您的代码在评估时是否有错误，为了获得所需的结果，或者只是您说它为0并且您编写了设置为20 player.setySpeed(20);。当时可能还不太了解:)但不应该是setx。 ..（0），没有setY

// If the player hits the side of the platform, 
           // set his xSpeed to 0 so that he does not go through the platform
            if(playerRect.getX() > getRect().getX() && 
              (playerRect.getY() > getRect().getY() && 
               playerRect.getY() < getRect().getY() + 
               getRect().getHeight())) {
                player.setySpeed(20);
            }

。另一方面，如果这是正确的，内部，而不是外部可以我没有测试它，你看上面

// If the player is on the top part of the platform, 
        // set his ySpeed to 0 so he remains on the platform rather 
        // than fall due to gravity
        if ((playerRect.getX() > getRect().getX() && 
             playerRect.getX() < getRect().getX() + 
             getRect().getWidth()) && 
             playerRect.getY() < getRect().getY()) {

            player.setySpeed(0);
            // If the player is on a platform or on the ground, allow him to jump
            if (playerOnPlatform() || player.onGround()) {
                player.setAllow("true", "jump");
            } else {
                player.setAllow("false", "jump");
            }

           // If the player hits the side of the platform, 
           // set his xSpeed to 0 so that he does not go through the platform
            if(playerRect.getX() > getRect().getX() && 
              (playerRect.getY() > getRect().getY() && 
               playerRect.getY() < getRect().getY() + 
               getRect().getHeight())) {
                player.setySpeed(20);
            }
        }

您可以使用日志，如果有时满足此条件

   // If the player hits the side of the platform, 
           // set his xSpeed to 0 so that he does not go through the platform
            if(playerRect.getX() > getRect().getX() && 
              (playerRect.getY() > getRect().getY() && 
               playerRect.getY() < getRect().getY() + 
               getRect().getHeight())) {
                player.setySpeed(20);

Gdx.app.log("inside", "test");

            }

LibGDX - 基本物理错误？无法检测到玩家与平台的一侧（平铺）之间的碰撞

1 个答案: