Unity 2D可拖動運動控制

Question

我想在我的2D應用程序中添加像國際足聯手機遊戲這樣的可拖動控件（附加圖像）。

我搜索了很多想法或基本教程或相關的Unity資產。但沒有找到。

幫助我一個例子或URL。

Answer 1

你可以使用這個，如果你想，它適用於網絡和移動

using UnityEngine; 
using System.Collections; 

public class JoyStick : MonoBehaviour { 

    public Texture areaTexture; 
    public Texture touchTexture; 
    public Vector2 joystickPosition = new Vector2(50f,50f); 
    public Vector2 speed = new Vector2(2,100); 
    public float zoneRadius=100f; 
    public float touchSize = 30; 
    public float deadZone=20; 
    public float touchSizeCoef=0; 
    protected Vector2 joystickAxis; 
    protected Vector2 joystickValue; 
    public Vector2 joyTouch; 
    private Vector2 _joystickCenter; 
    [SerializeField] 
    private Vector2 _smoothing = new Vector2(20f,20f); 
    public Vector2 Smoothing 
    { 
     get { 
      return this._smoothing; 
     } 
     set { 
      _smoothing = value; 
      if (_smoothing.x<0.1f){ 
       _smoothing.x=0.1f; 
      } 
      if (_smoothing.y<0.1){ 
       _smoothing.y=0.1f; 
      } 
     } 
    } 
    private int _joystickIndex=-1; 
    private bool _enaReset; 
    private bool _enaZoom; 

    void Start() 
    { 
     zoneRadius = Screen.width*0.07f; 
     touchSize = Screen.width*0.07f; 
     joystickPosition = new Vector2(Screen.width*0.12f,Screen.width*0.12f); 
     _joystickCenter = joystickPosition; 
     _enaReset=false; 
    } 

    void Update() 
    { 
     if (Application.platform == RuntimePlatform.IPhonePlayer || Application.platform == RuntimePlatform.Android) 
     { 
      foreach (Touch touch in Input.touches) 
      { 
       if (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled) 
       { 
        if (_joystickIndex==touch.fingerId){ 
         _joystickIndex=-1; 
         _enaReset=true; 
        } 
       } 

       if(_joystickIndex==touch.fingerId) 
       { 
        OnTouchDown(touch.position); 
       } 
       if (touch.phase == TouchPhase.Began) 
       { 
        if (((Vector2)touch.position - _joystickCenter).sqrMagnitude < Mathf.Pow((zoneRadius+touchSizeCoef/2),2)) 
        { 
         _joystickIndex = touch.fingerId; 
        } 
       } 
      } 

      UpdateJoystick(); 
      if(_enaReset) 
      { 
       ResetJoystick(); 
      } 
     } 
     else 
     { 
      if (Input.GetButtonUp ("Fire1"))  
      { 
       _joystickIndex=-1; 
       _enaReset=true; 
      } 
      if(_joystickIndex==1) 
      { 
       OnTouchDown(Input.mousePosition); 
      } 
      if (Input.GetButtonDown ("Fire1")) 
      { 
       if (((Vector2)Input.mousePosition - _joystickCenter).sqrMagnitude <Mathf.Pow((zoneRadius+touchSizeCoef/2),2)) 
       { 
        _joystickIndex = 1; 

       } 

      } 
      if(_enaReset) 
      { 
       ResetJoystick(); 
      } 

      UpdateJoystick(); 

     } 

    } 




    private void UpdateJoystick() 
    { 
     if (joyTouch.sqrMagnitude>deadZone*deadZone) 
     { 

      joystickAxis = Vector2.zero; 
      if (Mathf.Abs(joyTouch.x)> deadZone) 
      { 
       joystickAxis = new Vector2((joyTouch.x -(deadZone*Mathf.Sign(joyTouch.x)))/(zoneRadius-touchSizeCoef-deadZone),joystickAxis.y); 

      } 
      else 
      { 
       joystickAxis = new Vector2(joyTouch.x /(zoneRadius-touchSizeCoef),joystickAxis.y); 

      } 
      if (Mathf.Abs(joyTouch.y)> deadZone) 
      { 
       joystickAxis = new Vector2(joystickAxis.x,(joyTouch.y-(deadZone*Mathf.Sign(joyTouch.y)))/(zoneRadius-touchSizeCoef-deadZone)); 
      } 
      else{ 
       joystickAxis = new Vector2(joystickAxis.x,joyTouch.y/(zoneRadius-touchSizeCoef)); 
      } 

     } 
     else{ 
      joystickAxis = new Vector2(0,0); 
     } 
     Vector2 realvalue = new Vector2( speed.x*joystickAxis.x,speed.y*joystickAxis.y); 
     joystickValue=realvalue; 
     //print(realvalue); 

    } 

    void OnTouchDown(Vector2 position) 
    { 
     joyTouch = new Vector2(position.x, position.y) - _joystickCenter; 
     if ((joyTouch/(zoneRadius-touchSizeCoef)).sqrMagnitude > 1) 
     { 
      joyTouch.Normalize(); 
      joyTouch *= zoneRadius-touchSizeCoef; 
     } 
     //print(joyTouch); 
    } 


    private void ResetJoystick() 
    { 
     if (joyTouch.sqrMagnitude>0.1) 
     { 
      joyTouch = new Vector2(joyTouch.x - joyTouch.x*_smoothing.x*Time.deltaTime, joyTouch.y - joyTouch.y*_smoothing.y*Time.deltaTime);  
     } 
     else{ 
      joyTouch = Vector2.zero; 
      _enaReset=false; 
     } 
    } 
    void OnGUI() 
    { 
     GUI.DrawTexture(new Rect(_joystickCenter.x -zoneRadius ,Screen.height- _joystickCenter.y-zoneRadius,zoneRadius*2,zoneRadius*2), areaTexture,ScaleMode.ScaleToFit,true); 
     GUI.DrawTexture(new Rect(_joystickCenter.x+(joyTouch.x -touchSize) ,Screen.height-_joystickCenter.y-(joyTouch.y+touchSize),touchSize*2,touchSize*2), touchTexture,ScaleMode.ScaleToFit,true); 
    } 
}