Unity3d--物体移动到鼠标点击位置

using UnityEngine;
using System.Collections;

/*
 *物体移动到鼠标点击位置
*/

public class PlayerMove : MonoBehaviour {

    public float speed = 5;
    private PlayDir dir;
    private CubeCS cubeCS;

    void Awake(){
        dir = this.GetComponent<PlayDir> ();
        cubeCS = this.GetComponent<CubeCS> ();
    }

    // Use this for initialization
    void Start () {
    
    }
    
    // Update is called once per frame
    void FixedUpdate ()
    {
        //获取当前物体到目标物体的距离
        float distance = Vector3.Distance (dir.targetPosition, transform.position);

        //判断是否超出距离
        if (distance > 0.1f) {
            cubeCS.rb.velocity = transform.forward * speed * distance;
        } else{
            cubeCS.rb.velocity = transform.forward * 0;
        }
    }
}

using System.Collections;

/*
 * 根据鼠标点击位置改变物体朝向
*/
public class PlayDir : MonoBehaviour {

    public GameObject effect;
    private bool isMoving = false; //鼠标左键状态
    public Vector3 targetPosition;

    void Awake(){
        //初始化目标位置为当前物体的位置
        targetPosition = this.transform.position;
    }

    // Update is called once per frame
    void Update () {
        //判断鼠标左键是否按下
        if (Input.GetMouseButtonDown(0)) {
            //获取由主摄像机位置到鼠标点击位置的一条射线
            Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
            RaycastHit hitInfo;
            bool isCollider = Physics.Raycast (ray, out hitInfo);
            //判断射线是否成功发射且是否触发目标物体
            if (isCollider && hitInfo.collider.tag == Tags.ground) {
                //参数为目标物体的位置信息
                ShowClickEffect (hitInfo.point);
                isMoving = true;
                LookAtTarget (hitInfo.point);
            }
        }

        //判断鼠标左键是否抬起
        if (Input.GetMouseButtonUp(0)) {
            isMoving = false;
        }

        if (isMoving) {
            //获取由主摄像机位置到鼠标点击位置的一条射线
            Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
            RaycastHit hitInfo;
            bool isCollider = Physics.Raycast (ray, out hitInfo);
            //判断射线是否成功发射且是否触发目标物体
            if (isCollider && hitInfo.collider.tag == Tags.ground) {
                LookAtTarget (hitInfo.point);
            }
        }
    }

    void ShowClickEffect(Vector3 hitPoint){
        hitPoint = new Vector3 (hitPoint.x, hitPoint.y + 0.3f, hitPoint.z);
        GameObject.Instantiate (effect, hitPoint, Quaternion.identity);
    }
        
    void LookAtTarget(Vector3 hitPoint){
        //获取触发目标物体的位置信息
        targetPosition = hitPoint;
        //将目标位置的y轴修改为当前物体的y轴
        targetPosition = new Vector3 (targetPosition.x, transform.position.y, targetPosition.z);

        //当前物体朝向目标位置
        this.transform.LookAt (targetPosition);
    }
}

using UnityEngine;
using System.Collections;

/*
 *控制刚体的移动与旋转 
 */

public class CubeCS : MonoBehaviour {

    /*
     * 在场景中创建一个Cube刚体
     * 将刚体的位置和角度进行坐标约束,位置约束Y,方向约束x z
    */
    public Rigidbody rb;
    public float speed = 5;
    public float angularSpeed = 3;
    // Use this for initialization

    void Awake(){
        rb = this.GetComponent<Rigidbody> ();
    }

    /*
    void FixedUpdate(){
        Move ();
    }

    void Move(){
        //获取垂直数值
        float v = Input.GetAxis ("Vertical"); 
        //设置刚体速度为 自身前方向*垂直数值*速度  控制刚体移动
        rb.velocity = this.transform.forward * v * speed;

        //获取水平数值
        float h = Input.GetAxis ("Horizontal");
        //设置刚体角速度为 自身上方向*垂直数值*速度  控制刚体旋转
        rb.angularVelocity = this.transform.up * h * angularSpeed;
    }
    */
}