Unity：相机对撞机

Question

我正在为一个学校项目创建一个第三人称游戏，但我遇到了一些碰撞问题：我有一个带相机的玩家小时候有一个球体碰撞器。当相机与房屋等任何风景物体发生碰撞时，它应该缩小。一旦它离开碰撞情况，它应该回到原来的位置（它的局部 y 应该是 4.5）。现在我在静止不动时遇到以下问题：相机不断离开并进入对象的对撞机，导致它不断放大和缩小。这会导致看起来非常有问题的相机移动。有什么办法可以解决这个问题吗？

我使用了以下代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;



public class CamMovement : MonoBehaviour
 {
     public GameObject Parent;

     //Checks if the camera collides with something
     void OnTriggerStay(Collider other)
     {
         //When colliding, the camera moves up and back from the player object          
         transform.position += new Vector3(0, 0.2f, -0.2f);    
     }


     void Update()
     {
         //makes sure the camera always looks at the player object   
         transform.LookAt(Parent.transform);

         //Moves the camera back to the normal (local) position
         if (transform.localPosition.y > 4.5f)
         {
             transform.position += new Vector3(0, Time.deltaTime * -4f, Time.deltaTime * 4f);
         }
     }
 }

相机与某物碰撞时的样子：http://imgur.com/a/7ot9R

Answer 1

您需要检查哪个对撞机与相机对撞机发生碰撞，您可以使用OnColliderEnter(Collider other) 中类似的结构来实现这一点：

Collider playerCollider = GameObject.Fine("Player").GetComponent<Collider>();
if (!other == playerCollider)
{
//Do your zooming out.
}

Answer 2

不确定我是否正确理解您想要实现的目标，但我会试一试：

我认为您应该研究OnTriggerEnter 和OnTriggerExit 事件，这样您就可以告诉相机在输入触发器时移开并在其退出时移回。

public class CamMovement : MonoBehaviour
{
    //using "parent" as variable name is not recommended since Transform class already contains a parent variable
    [SerializeField]
    private GameObject parentToLookAt;
    [SerializeField]
    private Vector3 localPositionOffset;
    [Range(0.0f, 10.0f)]
    [SerializeField]
    private float transitionSpeed;

    private Vector3 localPositionOnStart;
    private bool applyOffset;

    void Start()
    {
        localPositionOnStart = transform.localPosition;
        applyOffset = false;
    }

    void Update()
    {
        //Makes sure the camera always looks at the player object
        //You can also use: transform.LookAt(transform.parent); 
        transform.LookAt(parentToLookAt.transform);

        //Moves the camera to the right local position (note that using Mathf.Lerp is not optimal performance-wise but if you want more info on this
        //I recommend looking for further informations at https://chicounity3d.wordpress.com/2014/05/23/how-to-lerp-like-a-pro/ )
        if (applyOffset)
        {
            transform.localPosition = Mathf.Lerp(transform.localPosition, localPositionOnStart + localPositionOffset, transitionSpeed * Time.deltaTime);
        }
        else
        {
            transform.localPosition = Mathf.Lerp(transform.localPosition, localPositionOnStart, transitionSpeed * Time.deltaTime);
        }
    }

    //Checks if the camera collides with something
    void OnTriggerEnter(Collider other)
    {
        applyOffset = true;
    }

    //Checks if the camera stops colliding with something
    void OnTriggerExit(Collider other)
    {
        applyOffset = false;
    }

    //You can also use this:
    //void OnTriggerStay(Collider other)
    //{
    //    applyOffset = true;
    //}
    // and set applyOffset to false at the end of the Update() method (OnTrigger events are called before Update each frame)
}

还有两件事：

• 在 C# 中编程时，一个常见的规则是不使用大写字母来开始变量名（这是保留给类名的）：您可以查看here 以获取全局指南
• 您也可以使用[SerializeField] 属性来序列化私有变量（并因此使其出现在检查器中）。我还添加了 [Range()] 属性，这在与设计师合作时很有用（他们不喜欢原始数字；））