physics.Raycast返回虚假统一

Question

我一直在尝试制作一个简单的射线播放，但我一直都会变得虚假，我的两个对象都有网框和盒子碰撞器。

我正在试图制造一条射线，如果玩家或敌人看到另一个射击

玩家，而敌人则具有以下组件：转换，盒子对撞机，网眼对撞机，僵化机构和脚本（ShothOnsightPlayer），Line Renderer，Nav Mesh Mesh Agent。

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

public class ShootOnSightPlayer : MonoBehaviour
{
    public float damage =10f;
    public float range = 100f;
    [SerializeField]
    public GameObject target;
    [SerializeField]
    public bool hasShoot = false;
    public RaycastHit hit;

    public Rigidbody bullet;
    private bool checkIfTurn = false;
    public Transform cannon;

    private Rigidbody clone;
    
    // Bit shift the index of the layer (8) to get a bit mask
    int layerMask = 1 << 8;

    void Start(){
        layerMask = ~layerMask;
         Debug.Log( " Raycast has hit from " + gameObject.transform.tag);
    }
    void FixedUpdate()
    {

        if(gameObject.GetComponent<EnemyController>()){
            checkIfTurn = gameObject.GetComponent<EnemyController>().isTurn;
        }else if(gameObject.GetComponent<PlayerController>()){
            checkIfTurn = gameObject.GetComponent<PlayerController>().isTurn;
        }   



        // This would cast rays only against colliders in layer 8.
        // But instead we want to collide against everything except layer 8. The ~ operator does this, it inverts a bitmask.
        
        Debug.Log(Physics.Raycast( cannon.position,  target.transform.position, out hit));
        if (Physics.Raycast( cannon.position,   target.transform.position, out hit) ){

                 Debug.DrawLine( cannon.position, target.transform.position, Color.white, 2.5f);

                
             Debug.Log("Hit tag " +  hit.collider.tag + " Target Tag " + target.tag + " Has Shoot " + hasShoot + " is my turn " + checkIfTurn);

            if( hit.collider.tag == target.tag  && !hasShoot && checkIfTurn ) {

            // Instantiate the projectile at the position and rotation of this transform
            
            clone = Instantiate(bullet, cannon.position, gameObject.transform.rotation);
           
            clone.transform.SetParent(gameObject.transform);
           

            hasShoot = true;
               
            }
        }
        
    }
}

Answer 1

此问题的原因是第二个射线广播参数要求您提供方向轴，而不是第二个目标的位置。

Physics.Raycast(fromPosition, direction, out var hit);

问题有两种解决方案：

首先计算方向轴

，从梁的起点减去目标，以获得方向轴，通过减去两个轴，它为您提供了其全长方向，同样需要大小要始终保持1个。您可以将其归一化，这在这里不需要。

Physics.Raycast( cannon.position, target.transform.position-cannon.position, out hit)

var direction = (target.transform.position - cannon.position).normalized;

---

使用Linecast

您可以使用physics.linecast作为替代方案，实际上是面向目标的射线播放。

Physics.Linecast(cannon.position, target.transform.position, out hit);