unity3d射线控制移动

看看效果图

代码：

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class T2 : MonoBehaviour
 5 {
 6 
 7     // Use this for initialization
 8     void Start()
 9     {
10 
11     }
12 
13     //定义射线
14     Ray ray;
15     RaycastHit hit;
16     //是否移动
17     bool isMove;
18     //移动方向
19     Vector3 dir;
20     Vector3 pos;
21 
22     // Update is called once per frame
23     void Update()
24     {
25         //float v = Input.GetAxis("Vertical");
26         //float h = Input.GetAxis("Horizontal");
27         //transform.Translate(transform.forward * v * Time.deltaTime);
28 
29 
30         //transform.Rotate(Vector3.up * h);
31 
32 
33         //鼠标左键按下的时候
34         if (Input.GetMouseButtonDown(0))
35         {
36             //从摄像机发一条射线
37             ray = Camera.main.ScreenPointToRay(Input.mousePosition); ;
38             //如果检测到物体(射线用来检测)
39             if (Physics.Raycast(ray, out hit))
40             {
41                 //将碰撞点的Y值变为transform的Y值
42                 pos = new Vector3(hit.point.x, transform.position.y, hit.point.z);
43 
44 
45                 //hit.point是物体的位置
46                 transform.LookAt(hit.point);
47                 //开始移动
48                 isMove = true;
49                 //求移动方向
50                 //dir = (hit.point - transform.position).normalized;
51 
52                 dir = (pos - transform.position).normalized;
53 
54             }
55         }
56         //如果开始移动
57         if (isMove)
58         {
59             //沿着世界坐标的某一个位置移动
60             transform.Translate(dir * Time.deltaTime * 3, Space.World);
61             //如果距离小于0.5m的时候，停止移动
62             if (Vector3.Distance(transform.position, hit.point) < 0.5f)
63             {
64                 isMove = false;
65             }
66         }
67 
68 
69 
70     }
71 }

当然。出来用LookAt还可以用LookRotation

using UnityEngine;
using System.Collections;

//加刚体
public class movee : MonoBehaviour
{

    // Use this for initialization
    void Start()
    {

    }

    bool isMove;
    Vector3 dir;

    RaycastHit hit;

    Vector3 hitPoint;

    Quaternion rotation;

    Quaternion originRatation;
    float timer;

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

            if (Physics.Raycast(ray, out hit))
            {



                hitPoint = new Vector3(hit.point.x, transform.position.y, hit.point.z);


                //transform.LookAt(hit.point);

                //dir = (hit.point - transform.position).normalized;


                dir = hitPoint - transform.position;


                rotation = Quaternion.LookRotation(dir);

                originRatation = transform.rotation;

                isMove = true;

                timer = 0;

            }
        }
        if (isMove)
        {
            //transform.Translate(dir * Time.deltaTime * 5, Space.World);

            timer += Time.fixedDeltaTime;


            //if (Vector3.Distance(transform.position, hit.point) < 0.5) isMove = false;


            //慢慢旋转过去,这不是匀速的。
            //transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.fixedDeltaTime*5);

            //既然想匀速的话，那么起点和终点不变。时间变化
            transform.rotation = Quaternion.Lerp(originRatation, rotation, timer);

            //transform.rotation = rotation; //角度直接等于这个

            if (Quaternion.Angle(transform.rotation, rotation) < 2)
            {
                transform.rotation = rotation;
                isMove = false;
            }

        }
    }

    public void Update()
    {

    }
}