Unity3D使用GL实现图案解锁功能-创新互联
聊天是时候看到有人问如何在Unity3D的UGUI中实现图案解锁的功能,然后便试了一下。刚开始想用LineRender来实现,但又一想是要在UGUI中,然后就用了另外一种方法,即使用GL类来实现。
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实现后在Android手机上跑的效果如下:
主要实现GraphicUnLockManager类。代码如下:
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_lstPoints = new List (); [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 _lstSelectPoints = new List ();//已选择连接点 [HideInInspector] public List _lstPassword = new List ();//以输入密码 [HideInInspector] public Action 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 (); if (trigger == null) { trigger = rtTrans.gameObject.AddComponent (); } //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 (); 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 ().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 ().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); } } }
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