Deme_遥感控制物体移动（涉及遮罩，小摄像机跟随）

using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;

public class JoyController : MonoBehaviour,IDragHandler,IEndDragHandler {

    //摇杆圆盘半径
    public float radius = 75f;
    //摇杆原始位置
    private Vector3 origin;
    //玩家的角色控制器
    private CharacterController player;
    //玩家移动速度
    public float speed = 10;
    //声明一个方向向量
    Vector3 dir;

    void Start()
    {
        //获取当前位置
        origin = transform.position;
        //找到主角玩家
        player = GameObject.FindWithTag ("Player").
            GetComponent<CharacterController> ();
    }

    void Update()
    {
        //玩家移动
        player.SimpleMove (new Vector3(dir.x,0,dir.y) * speed * Time.deltaTime);
    }

    /// <summary>
    /// 摇杆拖拽中
    /// </summary>
    /// <param name="eventData">Event data.</param>
    public void OnDrag (PointerEventData eventData)
    {
        //计算起点位置与当前鼠标位置的距离
        float distance = Vector3.Distance (origin, Input.mousePosition);
        //求方向向量
        dir = Input.mousePosition - origin;
        //如果拖拽在圆盘范围内
        if (distance <= radius) {
            //摇杆随鼠标移动而移动
            transform.position = Input.mousePosition;
        } else {
            //实际向量
            Vector3 real = dir.normalized * radius;
            //最终摇杆的位置
            transform.position = real + origin;
        }
    }
    /// <summary>
    /// 结束拖拽
    /// </summary>
    /// <param name="eventData">Event data.</param>
    public void OnEndDrag (PointerEventData eventData)
    {
        dir = Vector3.zero;
        //回到初始位置
        transform.position = origin;
    }
}

要注意的几个位置，添加相应组件。1,脚本挂载在遥感中心点Controller上.2,小摄像头(设置正交)挂为Player子物体跟随玩家移动3,遮罩设置