Unity屏幕滑杆

滑杆代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.EventSystems;


public class TuoUI : MonoBehaviour,IDragHandler,IEndDragHandler
{
       
       public Vector3 dir;
       Vector3 yuandian;
       RectTransform recttras;
       RectTransform rects;
       public float a;
       public float b;

       public  Animator ani;

       // Use this for initialization
       void Start ()
       {
              recttras = transform as RectTransform;
              yuandian = transform.position;
              rects=transform.parent as RectTransform;
       }
       
       // Update is called once per frame

       public Vector3 worldpos;

       public void OnDrag (PointerEventData eventData)
       {
              ani.SetFloat ("runs", 1);
              RectTransformUtility.ScreenPointToWorldPointInRectangle (recttras, Input.mousePosition, eventData.pressEventCamera, out worldpos);
              transform.position = worldpos;
              dir = transform.localPosition-Vector3.zero;

              if(Vector2.Distance(Input.mousePosition,yuandian)>rects.rect.width/2)
              {
                     transform.localPosition = Vector3.zero + dir.normalized * rects.rect.width / 2;
              }
                     
       }

       public void OnEndDrag (PointerEventData eventData)
       {
              transform.localPosition = Vector3.zero;
               dir = transform.localPosition-Vector3.zero;
              ani.SetFloat ("runs", 0);
       }



       void Update ()
       {
              a = dir.x / rects.rect.width / 2;
              b = dir.z / rects.rect.height / 2;
              

       }

角色脚本：

public class NinjaMove : MonoBehaviour {

    float h;
    float v;
    public float movespeed;
    //public float rotspeed;

       public TuoUI yaogan;

       Vector3 a;

       void Start ()
    {
    }


       
       void Update ()
    {

              a = new  Vector3 (yaogan.dir.normalized.x, 0, yaogan.dir.normalized.y);
              if(a.x != 0 || a.z != 0)
              {

                     transform.rotation = Quaternion.LookRotation (a);
                     transform.Translate(Vector3.forward* movespeed * Time.deltaTime);

              }


       }
}