C# 光线投射（Circlecast）和对象方向不相同

我试图画一条虚线，显示球落在哪里，并从那里反射。我用的是unity的物理系统

我认为圆投射和线渲染器有问题

无论我在哪里用鼠标点击，球都会在那里繁殖。因此，我认为BallCreate（）函数没有任何问题

问题就在这里

如图所示，球在transform.position上实例化并通过hit.point。不知何故，线渲染器和球的方向不一样。总有一点不同（有时更大）

代码如下：

我想在一周内解决这个问题，任何帮助都很重要

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

public Transform BallPrefab = null;
bool ShootDirected = true;
Vector3 mousePos;
private LineRenderer linerender;
RaycastHit2D hitx;
private Vector3 dir;
private Vector3 origin;
void Start()
{
    linerender = GetComponent<LineRenderer>();  
}
void Update()
{

    mousePos = new Vector3(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y, 0);
    //Direction according to mouse position.
    dir = mousePos - transform.position;

    origin = transform.position;

    //First hit point 0.3307159f is the radius of the ball.
    RaycastHit2D hit = Physics2D.CircleCast(origin, 0.3307159f, dir, 100f, 1 << 9 | 1<<10);

    if (hit.collider != null)
    {
        //Stored reflected hit point.
        Vector2 reflectDir = Vector2.Reflect(dir, hit.normal);

        //Then start second ray from hit point thru reflected hit point.
        RaycastHit2D SecondHit = Physics2D.CircleCast(hit.point, 0.3307159f, reflectDir, 100, 1 << 9 | 1<<10);

        //Draw lines beetween origin, hit.point and secondhit point.
        linerender.SetPosition(0, origin);
        linerender.SetPosition(1, hit.point);
        linerender.SetPosition(2, SecondHit.point);

    }
 //Create 50 balls when mouse clicked.
    if (Input.GetMouseButtonUp(0))
    {
        ShootDirected = true;
        StartCoroutine("BallCreate");
    }
 }

 IEnumerator BallCreate()
    {  
    Vector3 shootDirection = new Vector3(0,0,0);

    //Create 50 balls
    for (int i = 0; i < 50; i++)
    {

        Transform ball = Instantiate(BallPrefab, transform.position, Quaternion.identity) as Transform;
        Rigidbody2D rb = ball.GetComponent<Rigidbody2D>();

        if (ShootDirected)
        {
            //Set shootDirection to mouse position
            shootDirection = Input.mousePosition;
            shootDirection.z = 0.0f;
            shootDirection = Camera.main.ScreenToWorldPoint(shootDirection);

            //Get direction.
            shootDirection = (shootDirection - transform.position);
                ShootDirected = false;
        }
        //Apply force to each ball thru mouse direction.
        rb.velocity = new Vector2(shootDirection.x, shootDirection.y);
        rb.velocity = 7f * (rb.velocity.normalized);

        yield return new WaitForSeconds(0.08f);

    }
}
}

使用系统集合；
使用System.Collections.Generic；
使用UnityEngine；
public-Transform-ballpreaf=null；
bool=true；
矢量鼠标3；
私有linerender linerender；
RAYCASTHITX；
专用矢量3-dir；
私人矢量源；
void Start（）
{
linerender=GetComponent（）；
}
无效更新（）
{
mousePos=newvector3（Camera.main.ScreenToWorldPoint（Input.mousePosition）.x，Camera.main.ScreenToWorldPoint（Input.mousePosition）.y，0）；
//方向根据鼠标位置。
dir=鼠标点-transform.position；
原点=变换位置；
//第一个命中点0.3307159f是球的半径。
RaycastHit2D hit=Physics2D.CircleCast（origin，0.3307159f，dir，100f，1在Unity Technologies上的MelvMay帮助下发现了问题

简单地改变

`RaycastHit2D SecondHit = Physics2D.CircleCast(hit.point, 0.3307159f, reflectDir, 100, 1 << 9 | 1<<10);`

`RaycastHit2D SecondHit=Physics2D.CircleCast（hit.point，0.3307159f，reflectDir，100，1在Unity Technologies上的MelvMay帮助下发现了问题

简单地改变

`RaycastHit2D SecondHit = Physics2D.CircleCast(hit.point, 0.3307159f, reflectDir, 100, 1 << 9 | 1<<10);`

`RaycastHit2D SecondHit=Physics2D.CircleCast（hit.point，0.3307159f，reflectDir，100，1还更改linerender.SetPosition（0，原点）；linerender.SetPosition（1，hit.centroid）；linerender.SetPosition（2，SecondHit.centroid）；还更改linerender.SetPosition（0，原点）；linerender.SetPosition（1，命中.质心）；linerender.SetPosition（2，第二次命中.质心）；