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); } }}
另一个参考：https://blog.csdn.net/nanggong/article/details/52513729