Unity中玩家通过门传送直接跳至第三场景的问题求助

设置了3个关卡，通过Door对象实现玩家碰撞后传送至下一关卡，但玩家持续向前移动穿过门时，会直接传送至第三关卡。推测是OverlapCollider函数持续检测到碰撞导致多次触发传送逻辑，缩小门的Collider尺寸也无法解决。

相关代码如下：

Door 代码 #

public class Door : Collidable
{
    public string[] sceneNames;

    private static int sceneNumber = 0;

    protected override void OnCollide(Collider2D coll)
    {
        if(coll.name == "Player")
        {
            GameManager.instance.SaveState();

            //Teleport the player to next level
            sceneNumber++;

            if (sceneNumber >= sceneNames.Length)
            {
                return;
            }

            string sceneName = sceneNames[sceneNumber];
            SceneManager.LoadScene(sceneName);
        }
    }
}

Collidable 基类代码 #

public class Collidable : MonoBehaviour
{
    public ContactFilter2D filter;
    private BoxCollider2D boxCollider;
    private Collider2D[] hits = new Collider2D[10];

    protected virtual void Start()
    {
        boxCollider = GetComponent<BoxCollider2D>();
    }

    protected virtual void Update()
    {
        //Collision work
        boxCollider.OverlapCollider(filter,hits);
        for (int i = 0; i < hits.Length; i++)
        {
            if (hits[i] == null)
                continue;

            OnCollide(hits[i]);

            //The array is not cleaned up, so we do it ourself
            hits[i] = null; 
        }
    }

    protected virtual void OnCollide(Collider2D coll) 
    {
        Debug.Log("OnCollide was not implemented in " + this.name);
    }
}

碰撞体说明：门和玩家均使用BoxCollider2D，玩家移动时会持续与门的碰撞体重叠。

方案1：改用触发事件替代持续检测 #

将门的Collider设置为Is Trigger，然后替换基类的检测逻辑为OnTriggerEnter2D，这样只会在碰撞开始时触发一次：

修改Collidable类：

public class Collidable : MonoBehaviour
{
    protected virtual void Start()
    {
        // 确保Collider设置为Is Trigger
        GetComponent<BoxCollider2D>().isTrigger = true;
    }

    protected virtual void OnTriggerEnter2D(Collider2D coll)
    {
        OnCollide(coll);
    }

    protected virtual void OnCollide(Collider2D coll) 
    {
        Debug.Log("OnCollide was not implemented in " + this.name);
    }
}

方案2：给门添加单次触发标记 #

如果不想修改基类检测逻辑，可以在Door类中添加标记，确保每个门只触发一次传送：

修改Door类：

public class Door : Collidable
{
    public string[] sceneNames;
    private static int sceneNumber = 0;
    // 添加触发标记
    private bool hasTriggered = false;

    protected override void OnCollide(Collider2D coll)
    {
        if(coll.name == "Player" && !hasTriggered)
        {
            hasTriggered = true;
            GameManager.instance.SaveState();

            sceneNumber++;

            if (sceneNumber >= sceneNames.Length)
            {
                return;
            }

            string sceneName = sceneNames[sceneNumber];
            SceneManager.LoadScene(sceneName);
        }
    }
}

额外优化：static场景计数器的潜在问题 #

sceneNumber使用static修饰，可能导致场景重新加载后计数器不会重置（比如玩家回到之前的关卡）。如果需要支持关卡回溯，可以将sceneNumber移到GameManager中管理，或者在场景加载时重置该值。

内容的提问来源于stack exchange，提问作者jonathan