unity3d射线控制移动

看看效果图

代码：

 using UnityEngine;
 using System.Collections;

 public class T2 : MonoBehaviour
 {

     // Use this for initialization
     void Start()
     {

     }

     //定义射线
     Ray ray;
     RaycastHit hit;
     //是否移动
     bool isMove;
     //移动方向
     Vector3 dir;
     Vector3 pos;

     // Update is called once per frame
     void Update()
     {
         //float v = Input.GetAxis("Vertical");
         //float h = Input.GetAxis("Horizontal");
         //transform.Translate(transform.forward * v * Time.deltaTime);

         //transform.Rotate(Vector3.up * h);

         //鼠标左键按下的时候
         if (Input.GetMouseButtonDown())
         {
             //从摄像机发一条射线
             ray = Camera.main.ScreenPointToRay(Input.mousePosition); ;
             //如果检测到物体(射线用来检测)
             if (Physics.Raycast(ray, out hit))
             {
                 //将碰撞点的Y值变为transform的Y值
                 pos = new Vector3(hit.point.x, transform.position.y, hit.point.z);

                 //hit.point是物体的位置
                 transform.LookAt(hit.point);
                 //开始移动
                 isMove = true;
                 //求移动方向
                 //dir = (hit.point - transform.position).normalized;

                 dir = (pos - transform.position).normalized;

             }
         }
         //如果开始移动
         if (isMove)
         {
             //沿着世界坐标的某一个位置移动
             transform.Translate(dir * Time.deltaTime * , Space.World);
             //如果距离小于0.5m的时候，停止移动
             if (Vector3.Distance(transform.position, hit.point) < 0.5f)
             {
                 isMove = false;
             }
         }

     }
 }

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())
        {
            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 = ;

            }
        }
        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) < )
            {
                transform.rotation = rotation;
                isMove = false;
            }

        }
    }

    public void Update()
    {

    }
}