Unity3D使用GL实现图案解锁功能

using UnityEngine;using System.Collections.Generic;using System;using UnityEngine.EventSystems;using UnityEngine.UI;public class GraphicUnLockManager : MonoBehaviour{ [Tooltip("含有Selectable及Image组件的UI对象，作为连接点。")] public List<RectTransform> _lstPoints = new List<RectTransform>(); [Tooltip("用于设置所画线的颜色。（可使用“unlit/Color”Shader）")] public Material _matLineColor; [Tooltip("用于设置所画线的高度。")] public int _nHalfHeight = 15; [Tooltip("用于设置选择时Image的颜色。")] public Color _clrSelect = Color.red; [Tooltip("用于设置未选择时Image的颜色。")] public Color _clrUnSelect = Color.white; [HideInInspector] public List<RectTransform> _lstSelectPoints = new List<RectTransform>();//已选择连接点 [HideInInspector] public List<int> _lstPassword = new List<int>();//以输入密码 [HideInInspector] public Action<bool> onInputState;//true为开始输入，false为结束输入 private bool _isPressing = false;//是否按下 private Vector2 _vtPressPos;//按下点坐标 private float _fDistance;//距离 private float _fDegree;//夹角 private Matrix4x4 _matrixTrans;//变换矩阵 private Vector2[] _vertexPos = new Vector2[4];//顶点数组 private Vector2 _tempPos; void Awake() {  InitEnterEvent();//初始化所有连接点的消息  ClearLines();//清空相关数据 } void Update() {  if (!IsPressed())  {//当未按下时清空是数据   ClearLines();  } } bool IsPressed() {  //触摸  if (Input.touchCount > 0)  {   switch (Input.touches[0].phase)   {    case TouchPhase.Began:     _isPressing = true;     if (onInputState != null)     {      onInputState(true);//状态改变     }     break;    case TouchPhase.Ended:    case TouchPhase.Canceled:     _isPressing = false;     if (onInputState != null)     {      onInputState(false);//状态改变     }     break;   }   _vtPressPos = Input.touches[0].position;  }  else  {   //鼠标   if (Input.GetMouseButtonDown(0))   {    _isPressing = true;    if (onInputState != null)    {     onInputState(true);//状态改变    }   }   if (Input.GetMouseButtonUp(0))   {    _isPressing = false;    if (onInputState != null)    {     onInputState(false);//状态改变    }   }   _vtPressPos = Input.mousePosition;  }  return _isPressing; } void OnPostRender() {  DrawLines();//画所有线 } void OnGUI() {  string msg = "";  msg += "是否正在输入:" + IsPressed() + "/n";  msg += "密码:";  for (int i = 0; i < _lstPassword.Count; i++)  {   msg += _lstPassword[i] + ",";  }  GUIStyle guiStyle = new GUIStyle();  guiStyle.normal.textColor = new Color(1, 1, 1); //设置字体颜色  guiStyle.fontSize = 75;  //设置字体大小  GUILayout.Label(msg, guiStyle); } void InitEnterEvent() {  //为每个点添加Enter事件  _lstPoints.ForEach((rtTrans) =>  {   EventTrigger trigger = rtTrans.GetComponent<EventTrigger>();   if (trigger == null)   {    trigger = rtTrans.gameObject.AddComponent<EventTrigger>();   }   //添加事件   EventTrigger.Entry entryEnter = new EventTrigger.Entry();   entryEnter.eventID = EventTriggerType.PointerEnter;//进入事件   EventTrigger.TriggerEvent evtEnter = new EventTrigger.TriggerEvent();   evtEnter.AddListener(OnSelectPoint);   entryEnter.callback = evtEnter;   trigger.triggers.Add(entryEnter);   EventTrigger.Entry entryDown= new EventTrigger.Entry();   entryDown.eventID = EventTriggerType.PointerDown;//按下事件   EventTrigger.TriggerEvent evtDown = new EventTrigger.TriggerEvent();   evtDown.AddListener(OnSelectPoint);   entryDown.callback = evtDown;   trigger.triggers.Add(entryDown);  }); } public void OnSelectPoint(BaseEventData obj) {  //转换数据类型  PointerEventData data = obj as PointerEventData;  GameObject target = null;  if (null != data.pointerEnter)  {   target = data.pointerEnter;  }  else if (null != data.pointerPress)  {   target = data.pointerPress;  }   AddSelectPoint(target);//添加选择连接点 } void AddSelectPoint(GameObject obj) {  if (IsPressed() && null != obj)  {   //将未连接的点添加到需要连接的点的列表中去   RectTransform rtTrans = obj.GetComponent<RectTransform>();   if (null != rtTrans && !_lstSelectPoints.Contains(rtTrans))   {    //添加到绘制列表    _lstSelectPoints.Add(rtTrans);    //添加密码序列    _lstPassword.Add(_lstPoints.IndexOf(rtTrans));    //改变颜色    rtTrans.GetComponent<Image>().color = _clrSelect;   }  } } void ClearLines() {  //清空选择及密码列表  _lstSelectPoints.Clear();  _lstPassword.Clear();  //还原颜色  _lstPoints.ForEach((rtTrans) =>  {   rtTrans.GetComponent<Image>().color = _clrUnSelect;  }); } void DrawLine(Vector2 vtStart, Vector2 vtEnd) {  _tempPos = vtEnd - vtStart;  _fDistance = Vector3.Distance(Vector3.zero, _tempPos);//距离  _fDegree = Vector3.Angle(_tempPos, Vector3.right);//与x轴正方向的夹角  //判断旋转方向，逆时针为正，顺时针为付  if (_tempPos.y < 0)  {   _fDegree *= -1;  }  //设置变换矩阵  _matrixTrans.SetTRS(vtStart, Quaternion.Euler(0, 0, _fDegree), Vector3.one);//设置变换矩阵  //设置绘制顶点坐标  _vertexPos[0].x = 0;  _vertexPos[0].y = -_nHalfHeight;  _vertexPos[1].x = 0;  _vertexPos[1].y = _nHalfHeight;  _vertexPos[2].x = _fDistance;  _vertexPos[2].y = _nHalfHeight;  _vertexPos[3].x = _fDistance;  _vertexPos[3].y = -_nHalfHeight;  //绘制  GL.PushMatrix();  GL.LoadPixelMatrix();//使(0,0,0)为左下角，(Screen.width,Screen.height,0)为右上角  GL.MultMatrix(_matrixTrans);  GL.Begin(GL.QUADS);//绘制四边形  for (int n = 0; n < 4; n++)  {   GL.Vertex(_vertexPos[n]);  }  GL.End();  GL.PopMatrix(); } void DrawLines() {  //设置线的材质  _matLineColor.SetPass(0);  //连接已选择的点  for (int nIndex = 0; nIndex < _lstSelectPoints.Count - 1; nIndex++)  {   DrawLine(_lstSelectPoints[nIndex].position, _lstSelectPoints[nIndex + 1].position);  }  //连接到Press点  if (IsPressed() && _lstSelectPoints.Count > 0)  {   DrawLine(_vtPressPos, _lstSelectPoints[_lstSelectPoints.Count - 1].position);  } }}