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(0))
        {
            //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 * 3, 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(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()
    {

    }
}