Unity3d--物體移動到鼠標點擊位置

using UnityEngine;
using System.Collections;

/*
 *物體移動到鼠標點擊位置
*/

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 ()
    {
        //獲取當前物體到目標物體的距離
        float distance = Vector3.Distance (dir.targetPosition, transform.position);

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

using System.Collections;

/*
 * 根據鼠標點擊位置改變物體朝向
*/
public class PlayDir : MonoBehaviour {

    public GameObject effect;
    private bool isMoving = false; //鼠標左鍵狀態
    public Vector3 targetPosition;

    void Awake(){
        //初始化目標位置為當前物體的位置
        targetPosition = this.transform.position;
    }

    // Update is called once per frame
    void Update () {
        //判斷鼠標左鍵是否按下
        if (Input.GetMouseButtonDown(0)) {
            //獲取由主攝像機位置到鼠標點擊位置的一條射線
            Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
            RaycastHit hitInfo;
            bool isCollider = Physics.Raycast (ray, out hitInfo);
            //判斷射線是否成功發射且是否觸發目標物體
            if (isCollider && hitInfo.collider.tag == Tags.ground) {
                //參數為目標物體的位置信息
                ShowClickEffect (hitInfo.point);
                isMoving = true;
                LookAtTarget (hitInfo.point);
            }
        }

        //判斷鼠標左鍵是否抬起
        if (Input.GetMouseButtonUp(0)) {
            isMoving = false;
        }

        if (isMoving) {
            //獲取由主攝像機位置到鼠標點擊位置的一條射線
            Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);
            RaycastHit hitInfo;
            bool isCollider = Physics.Raycast (ray, out hitInfo);
            //判斷射線是否成功發射且是否觸發目標物體
            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){
        //獲取觸發目標物體的位置信息
        targetPosition = hitPoint;
        //將目標位置的y軸修改為當前物體的y軸
        targetPosition = new Vector3 (targetPosition.x, transform.position.y, targetPosition.z);

        //當前物體朝向目標位置
        this.transform.LookAt (targetPosition);
    }
}

using UnityEngine;
using System.Collections;

/*
 *控制剛體的移動與旋轉 
 */

public class CubeCS : MonoBehaviour {

    /*
     * 在場景中創建一個Cube剛體
     * 將剛體的位置和角度進行坐標約束,位置約束Y,方向約束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(){
        //獲取垂直數值
        float v = Input.GetAxis ("Vertical"); 
        //設置剛體速度為 自身前方向*垂直數值*速度  控制剛體移動
        rb.velocity = this.transform.forward * v * speed;

        //獲取水平數值
        float h = Input.GetAxis ("Horizontal");
        //設置剛體角速度為 自身上方向*垂直數值*速度  控制剛體旋轉
        rb.angularVelocity = this.transform.up * h * angularSpeed;
    }
    */
}