原始的：

using UnityEngine;using System.Collections;public class NGUIJoystick : MonoBehaviour{    public float radius = 2.0f;    public Vector3 scale = Vector3.one;    private Plane mPlane;    private Vector3 mLastPos;    private UIPanel mPanel;    private Vector3 center;    [HideInInspector]    public Vector2 position;        private void Start ()    {        center = transform.localPosition;    }        /// 
    /// Create a plane on which we will be performing the dragging.    /// 
        private void OnPress (bool pressed)    {        if (enabled && gameObject.activeInHierarchy) {            if (pressed) {                mLastPos = UICamera.lastHit.point;                mPlane = new Plane (Vector3.back, mLastPos);            } else {                transform.localPosition = center;                position=Vector2.zero;            }        }    }    /// 
    /// Drag the object along the plane.    /// 
    void OnDrag (Vector2 delta)    {        if (enabled && gameObject.activeInHierarchy) {            UICamera.currentTouch.clickNotification = UICamera.ClickNotification.BasedOnDelta;            Ray ray = UICamera.currentCamera.ScreenPointToRay (UICamera.currentTouch.pos);            float dist = 0f;            if (mPlane.Raycast (ray, out dist)) {                Vector3 currentPos = ray.GetPoint (dist);                Vector3 offset = currentPos - mLastPos;                mLastPos = currentPos;                if (offset.x != 0f || offset.y != 0f) {                    offset = transform.InverseTransformDirection (offset);                    offset.Scale (scale);                    offset = transform.TransformDirection (offset);                }                                offset.z = 0;                transform.position += offset;                                float length = transform.localPosition.magnitude;                                 if (length > radius) {                    transform.localPosition = Vector3.ClampMagnitude (transform.localPosition, radius);                }                position = new Vector2((transform.localPosition.x-center.x)/radius,(transform.localPosition.y-center.y)/radius);            }        }    }    }

 

超凡特工的：

using System;using UnityEngine;public class NGUIJoystick : MonoBehaviour{    public bool activeFlag;    public Vector3 center;    private float deadRadius;    public float deadRadiusRatio = 0.3f;    public bool lastPressed;    protected UIPanel mPanel;    protected Plane mPlane;    public Vector2 normalizedPosition;    public float normalizedRadius = 2f;    public Vector2 position;    public float radius = 2f;    public Vector3 worldCenter;    internal void Move(Vector3 offset)    {        offset.z = 0f;        base.transform.position = this.worldCenter + offset;        float magnitude = base.transform.localPosition.magnitude;        if (magnitude < this.deadRadius)        {            this.normalizedPosition = Vector2.zero;        }        else        {            if (magnitude > this.radius)            {                base.transform.localPosition = Vector3.ClampMagnitude(base.transform.localPosition, this.radius);            }            float num2 = base.transform.localPosition.x - this.center.x;            float num3 = base.transform.localPosition.y - this.center.y;            this.position.x = num2 / this.radius;            this.position.y = num3 / this.radius;            this.normalizedPosition.x = num2 / this.normalizedRadius;            this.normalizedPosition.y = num3 / this.normalizedRadius;            this.normalizedPosition.x = Mathf.Clamp(this.normalizedPosition.x, -1f, 1f);            this.normalizedPosition.y = Mathf.Clamp(this.normalizedPosition.y, -1f, 1f);        }    }    internal virtual void OnDrag(Vector2 delta)    {        if (base.enabled && base.gameObject.activeInHierarchy)        {            Ray ray = UICamera.currentCamera.ScreenPointToRay((Vector3) UICamera.currentTouch.pos);            float enter = 0f;            if (this.mPlane.Raycast(ray, out enter))            {                Vector3 offset = ray.GetPoint(enter) - this.worldCenter;                this.Move(offset);            }        }    }    internal virtual void OnPress(bool pressed)    {        if (base.enabled && base.gameObject.activeInHierarchy)        {            if (pressed)            {                this.mPlane = new Plane(Vector3.back, UICamera.lastHit.point);            }            else            {                base.transform.localPosition = this.center;                this.position = Vector2.zero;                this.activeFlag = true;            }            this.lastPressed = pressed;        }    }    public void SetRadius(float r, float nr)    {        this.radius = r;        this.normalizedRadius = nr;        this.deadRadius = this.radius * this.deadRadiusRatio;    }    internal virtual void Start()    {        this.center = base.transform.localPosition;        this.worldCenter = base.transform.position;    }}

 

namespace Kola{    using LuaInterface;    using System;    using UnityEngine;    public class KJoystick : NGUIJoystick    {        public UIRect bgObject;        public bool FollowPressPosition;        private Vector3 originPos;        private Transform parent;        public LuaTable playerControl;        public LuaFunction playerControlSetInputFunc;        public KMoveBehavior playerMove;        public float pressAlpha = 0.5f;        private void _OnDrag(GameObject go, Vector2 delta)        {            this.OnDrag(delta);        }        private void _OnPress(GameObject go, bool pressed)        {            this.OnPress(pressed);            if (pressed)            {                Vector3 point = UICamera.lastHit.point;                if (this.FollowPressPosition)                {                    this.parent.position = point;                }                else                {                    Vector3 position = this.parent.position;                    Vector3 offset = point - position;                    base.Move(offset);                    this.OnDrag(Vector2.zero);                }                if (this.bgObject != null)                {                    this.bgObject.alpha = this.pressAlpha;                }            }            else            {                if (this.playerMove != null)                {                    this.playerMove.Stand();                }                if (this.bgObject != null)                {                    this.bgObject.alpha = 1f;                }                if (this.playerControlSetInputFunc != null)                {                    object[] args = new object[] { this.playerControl, 0f, 0f, true };                    KLuaFunc.Call(this.playerControlSetInputFunc, args);                }                if (this.FollowPressPosition)                {                    this.parent.position = this.originPos;                }            }        }        public void Attach(GameObject draggedObj, GameObject bgObj)        {            UIEventListener listener1 = UIEventListener.Get(draggedObj);            listener1.onPress = (UIEventListener.BoolDelegate) Delegate.Combine(listener1.onPress, new UIEventListener.BoolDelegate(this._OnPress));            UIEventListener listener2 = UIEventListener.Get(draggedObj);            listener2.onDrag = (UIEventListener.VectorDelegate) Delegate.Combine(listener2.onDrag, new UIEventListener.VectorDelegate(this._OnDrag));            this.bgObject = (bgObj != null) ? bgObj.GetComponent
     
      () : null;        }        private void OnDisable()        {            this._OnPress(base.gameObject, false);        }        internal override void OnDrag(Vector2 delta)        {            base.OnDrag(delta);            if ((this.playerMove != null) && (base.enabled && base.gameObject.activeInHierarchy))            {                if (this.playerControlSetInputFunc != null)                {                    object[] args = new object[] { this.playerControl, this.normalizedPosition.x, this.normalizedPosition.y, false };                    KLuaFunc.Call(this.playerControlSetInputFunc, args);                }                else                {                    this.playerMove.Move(this.normalizedPosition.x, this.normalizedPosition.y);                }            }        }        public void OnDrawGizmos()        {            Gizmos.color = Color.green;            Vector3 to = base.transform.position + ((Vector3) (new Vector3(this.position.x, this.position.y, 0f) * 100f));            Gizmos.DrawLine(base.transform.position, to);        }        public void SetPlayer(GameObject obj)        {            this.playerMove = obj.GetComponent
      
       ();        }        public void SetPlayerControl(LuaTable control)        {            this.playerControl = control;            this.playerControlSetInputFunc = KLuaBehavior.GetFunction(control, "SetJoyStickInput");        }        internal override void Start()        {            base.Start();            this.parent = base.transform.parent;            this.originPos = this.parent.position;        }    }}