Unity C＃检测以上所有游戏对象

问题描述

我希望我的玩家能够检测到第8层中的所有游戏对象。我找到了可以检测以上所有游戏对象的代码，但它只能像这些图中的x = 0线上那样进行检测，

What It does

What I want

   RaycastHit[] hitsUp = Physics.RaycastAll(transform.position,transform.up,distance);
   RaycastHit[] hitsDown = Physics.RaycastAll(transform.position,-transform.up,distance);
   foreach (RaycastHit hit in hitsUp)
   {
       if (hit.collider.gameObject.layer == 8)
       {
            Physics.IgnoreCollision(hit.collider,GetComponent<Collider>());
       }
   }
   foreach (RaycastHit hit in hitsDown)
   {
       if (hit.collider.gameObject.layer == 8)
       {
            Physics.IgnoreCollision(hit.collider,GetComponent<Collider>(),false);
       }
   }

我该如何解决这个问题？谢谢您的答复。

解决方法

只需在您的Raycast中添加layermask过滤器即可。

int layerMask = 1 << 8; // - detects raycasts only on 8 layer
RaycastHit[] hitsUp = Physics2D.Raycast(transform.position,transform.up,distance,layerMask);
RaycastHit[] hitsDown = Physics.RaycastAll(transform.position,-transform.up,layerMask);

foreach不需要。

,

问题是您的Raycast只能捕捉到播放器正上方的“命中”，因为它沿着一条直线。

您可以将所有gameObjects放在单个父对象中，并遍历每个gameObject，检查其图层，然后检查它是否在您之上或之下

类似的事情可能起作用：

public Transform parent;
private Collider myCollider;

private void Start() 
{
    myCollider = GetComponent<Collider>();
}

private void DetectObjects()
{
    //Loop through each object above/below
    foreach (Transform child in parent)
    {
        GameObject childObj = child.gameObject;
        if (childObj.layer == 8) //Is the object on the correct layer?
        {
            if (child.position.y > transform.position.y) Physics.IgnoreCollision(childObj.GetComponent<Collider>(),myCollider);             //GameObjects above the player
            else if (child.position.y < transform.position.y) Physics.IgnoreCollision(childObj.GetComponent<Collider>(),myCollider,false); //GameObjects below the player
        }
    }
}

另外，您应该尝试存储Collider组件，而不要使用GetComponent<>()，因为它非常慢。

根据是否要创建/删除对象，您也可以为其存储碰撞器，这将使代码的性能提高很多，例如：

public Transform parent;
private Collider myCollider;
private Collider[] objColliders;

private void Start() 
{
    myCollider = GetComponent<Collider>();
    //If any gameObject is inactive it can also be grabbed by adding true as a paramater
    objColliders = parent.GetComponentsInChildren<Collider>();
}

private void DetectObjects()
{
    GameObject childObj;
    //Loop through colliders
    for (int i = 0; i < objColliders.Length; i++)
    {
        childObj = objColliders[i].gameObject; //Store as gameObject reference
        if (childObj.layer == 8)
        {
            if (childObj.transform.position.y > transform.position.y) Physics.IgnoreCollision(objColliders[i],myCollider);             //GameObjects above the player
            else if (childObj.transform.position.y < transform.position.y) Physics.IgnoreCollision(objColliders[i],false); //GameObjects below the player
        }
    }
}