unity-射线拾取物体的三角面片+显示碰撞点的坐标

最近在搞定位物体这方面的，用摄像机发出射线，然后鼠标点击哪里，射线射哪里，在射击的位置产生碰撞，然后对碰撞点进行定位。

代码如下：

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

public class shiquer : MonoBehaviour
{
    public float pokeForce;
    // Use this for initialization
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonUp(0))
        {
            RaycastHit hit;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

            if (Physics.Raycast(ray, out hit, 10000))
                if (hit.rigidbody != null)
                    hit.rigidbody.AddForceAtPosition(ray.direction * pokeForce, hit.point);
            {
                Debug.Log(hit.point);
           
        }
            {
                //transform.position = hit.point;

                //拾取三角面前提是物体含有一个MeshCollider碰撞器
                MeshCollider collider = hit.collider as MeshCollider;
                if (collider == null || collider.sharedMesh == null)
                    return;

                //获取碰撞器所在物体的Mesh网格
                Mesh mesh0 = collider.sharedMesh;
                //Mesh mesh1 = collider.sharedMesh;
                //获取Mesh网格的所有顶点
                Vector3[] vertices = mesh0.vertices;
                // Vector3[] vertices = mesh1.vertices;
                //获取mesh的三角形索引，这里的索引的就是模型顶点数组的下标
                int[] triangles = mesh0.triangles;
                //int[] triangles = mesh1.triangles;
                //然后通过hit.triangleIndex(摄像碰撞到的三角形的第一个点的索引)

                //然后+1 ，+2，获取三角形另外两个点的坐标
                Vector3 p0 = vertices[triangles[hit.triangleIndex * 3]];
               // Vector3 p1 = vertices[triangles[hit.triangleIndex * 3 + 1]];
               // Vector3 p2 = vertices[triangles[hit.triangleIndex * 3 + 2]];
                Transform transform = collider.transform;

                //上面的三个顶点是Mesh的本地坐标，需要用模型的Transform进行转换到世界坐标
                p0 = transform.TransformPoint(p0);
                //p1 = transform.TransformPoint(p1);
               // p2 = transform.TransformPoint(p2);

                //然后设置三个小球的位置到这个三个点，方便调试，呵呵！
                GameObject.Find("Sphere1").transform.position = p0;
               // GameObject.Find("Sphere2").transform.position = p1;
               // GameObject.Find("Sphere3").transform.position = p2;
            }
        }
    }
}

上面是鼠标点击一处，红色标记会在鼠标点击处显示，并且在console中显示它所在的坐标。