【转】简单的虚拟摇杆控制移动（NGUI）

http://www.cnblogs.com/zhangbaochong/p/4928688.html

一、用NGUI创建虚拟摇杆贴图

先创建一个sprite作为背景叫做JoyStick 并添加一个BoxCollider，再创建一个sprite child作为虚拟摇杆中间的按钮，叫做button

二、通过虚拟摇杆获得x，y偏移值

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class JoyStick : MonoBehaviour 
 5 {
 6 
 7     private bool isPress = false;
 8     private Transform button;
 9 
10     //从虚拟摇杆的得到的x，y偏移值-1到1之间
11     public static float h = 0;
12     public static float v = 0;
13     void Awake()
14     {
15         button = transform.FindChild("button");
16     }
17     void OnPress(bool isPress)
18     {
19         this.isPress = isPress;
20         if (!isPress)
21         {
22             button.localPosition = Vector2.zero;
23             h = 0;
24             v = 0;
25         }
26     }
27 
28     void Update()
29     {
30         if (isPress)
31         {
32             Vector2 touchPos = UICamera.lastEventPosition - new Vector2(91, 91);
33             float distance = Vector2.Distance(Vector2.zero, touchPos);
34             if (distance > 73)//虚拟摇杆按钮不能超过半径
35             {
36                 touchPos = touchPos.normalized * 73;
37             }            
38             button.localPosition = touchPos;
39 
40             h = touchPos.x / 73;
41             v = touchPos.y / 73;
42         }
43     }
44 }

三、通过偏移控制移动 主角添加了character controller

 1 using UnityEngine;
 2 using System.Collections;
 3 
 4 public class PlayerMove : MonoBehaviour 
 5 {
 6     private CharacterController cc;
 7     public float speed = 3f;
 8 
 9     void Awake()
10     {
11         cc = GetComponent<CharacterController>();
12     }
13     
14     // Update is called once per frame
15     void Update () 
16     {
17         //键盘控制
18         float h = Input.GetAxis("Horizontal");
19         float v = Input.GetAxis("Vertical");
20 
21         //虚拟摇杆控制
22         if (JoyStick.h != 0 || JoyStick.v != 0)
23         {
24             h = JoyStick.h;
25             v = JoyStick.v;
26         }
27 
28         if (Mathf.Abs(h) > 0.1f || Mathf.Abs(v) > 0.1f)
29         {
30             Vector3 targetDir = new Vector3(h, 0, v);
31             transform.LookAt(targetDir + transform.position);
32             cc.SimpleMove(targetDir * speed);
33         }
34 
35        
36     }
37 }