unity c# 触摸屏物体识别桌算法

unity源码地址链接：unityc#触摸屏物体识别桌算法-C#文档类资源-CSDN下载

实操的时候出现算出来的坐标不对，没有时间去找问题，优化了，所以代码仅供参考。

使用的是Lean Touch插件，免费的。

模块由三个点构成，基本构成等腰三角形，但是实际是会有误差的。

我的想法是在识别时，1.先计算出所有的边的长度，并记录下坐标。2.然后对比配置文件中的长度，记录符合配置文件的长度。3.然后再对比配置文件中的角度值。

主要算法在OnFingerUpdate（）中，Update（）中按下W键，则是记录模块的三条边长度和顶角的角度。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Lean.Touch;
using UnityEngine.UI;
using System;public class touchTest : MonoBehaviour
{public Text text;public Text text2;public static List<LeanFinger> Fingers = new List<LeanFinger>(10);private static List<LeanFinger> allFingers = new List<LeanFinger>();//记录模块最后一次的旋转角度，并进行比较，当前是正转是反转private double[] RecordLastAngel = new double[6] { 0, 0, 0, 0, 0, 0 };public GameObject[] MoveObj;public GameObject RecordPage;void Start(){//MoveObj[0].transform.rotation = Quaternion.Euler(Vector3.forward * (float)-60);}private void OnEnable(){LeanTouch.OnFingerUpdate += OnFingerUpdate;LeanTouch.OnFingerDown += OnFingerDown;LeanTouch.OnFingerUp += OnFingerUp;LeanTouch.OnFingerSwipe += OnFingerSwipe;}private void OnDisable(){LeanTouch.OnFingerUpdate -= OnFingerUpdate;LeanTouch.OnFingerDown -= OnFingerDown;LeanTouch.OnFingerUp -= OnFingerUp;LeanTouch.OnFingerSwipe -= OnFingerSwipe;}public class PtoP_Length{public float distances { get; set; }public Vector2 FirstPosition { get; set; }public Vector2 SecondPosition { get; set; }}void OnFingerUpdate(LeanFinger finger){var fingers = LeanTouch.Fingers;text.text = "";if (fingers.Count >= 4){List<PtoP_Length> PtoP_length = new List<PtoP_Length>();PtoP_length.Clear();//Debug.Log("1" + fingers[0].ScreenPosition);//Debug.Log("2" + fingers[1].ScreenPosition);//Debug.Log("3" + fingers[2].ScreenPosition);//Debug.Log("4" + fingers[3].ScreenPosition);//所有点到点的长度for (int i = 1; i < fingers.Count; i++){//text.text += fingers[i].ScreenPosition.ToString() + "|";for (int j = i + 1; j < fingers.Count; j++){double temp = getPointBetweenLength(fingers[i].ScreenPosition, fingers[j].ScreenPosition);//记录点到点的长度和两点的坐标PtoP_Length ppl = new PtoP_Length();ppl.FirstPosition = fingers[i].ScreenPosition;ppl.SecondPosition = fingers[j].ScreenPosition;ppl.distances = (float)(temp);PtoP_length.Add(ppl);text2.text += temp + "|";}}//对比配置文件中的令牌数据List<int> RecordDis = new List<int>();//RecordDis.Clear();for (int i = 0; i < ReadXml.ID.Count; i++){RecordDis.Clear();//对比配置文件中符合距离的数据for (int j = 0; j < PtoP_length.Count; j++){//记录符合距离的数据if (PtoP_length[j].distances > (Convert.ToInt32(ReadXml.DisA[i]) - 10)&& PtoP_length[j].distances < (Convert.ToInt32(ReadXml.DisA[i]) + 10)){RecordDis.Add(j);}else if (PtoP_length[j].distances > (Convert.ToInt32(ReadXml.DisB[i]) - 10)&& PtoP_length[j].distances < (Convert.ToInt32(ReadXml.DisB[i]) + 10)){RecordDis.Add(j);}else if (PtoP_length[j].distances > (Convert.ToInt32(ReadXml.DisC[i]) - 10)&& PtoP_length[j].distances < (Convert.ToInt32(ReadXml.DisC[i]) + 10)){RecordDis.Add(j);}}bool temprecordbool = false;//获取正确角度的数值for (int k = 0; k < RecordDis.Count; k++){for (int l = 0; l < RecordDis.Count; l++){if (temprecordbool == false){for (int o = 0; o < RecordDis.Count; o++){//获取所有可能double temp1 = PtoP_length[RecordDis[k]].distances;double temp2 = PtoP_length[RecordDis[l]].distances;double temp3 = PtoP_length[RecordDis[o]].distances;//获取所有可能的角度double tempangle = GetAngle(temp1, temp2, temp3);//把记录下的角度增减10度左右,因为可能会有误差double angleplus = Convert.ToDouble(ReadXml.Angle[i]) + 10;double anglejian = Convert.ToDouble(ReadXml.Angle[i]) - 10;//然后和所有的角度进行比对if (tempangle <= angleplus && tempangle >= anglejian){//角度正确，即表示temp1为（1，2），temp2为（2，3），temp3为（1，3）或者（3，1）//坐标只有3个点，那么只需要PtoP_length[RecordDis[k]].distances上的两个点//就是第一个和第二个，第二个vet2为顶点坐标，//PtoP_length[RecordDis[l]].distances的第二个坐标即为最后一个坐标点Vector2 vet1 = PtoP_length[RecordDis[k]].FirstPosition;Vector2 vet2 = PtoP_length[RecordDis[k]].SecondPosition;Vector2 vet3 = PtoP_length[RecordDis[l]].SecondPosition;Vector2 centerPoint = GetCiclePoint(vet1, vet2, vet3);MoveObj[i].transform.position = new Vector2(centerPoint.x, centerPoint.y);//计算角度值,角度值为坐标系的上方为：0~180度，坐标系的下方为：-1~-179度//angel = Math.atan2(y, x)double xposition = vet2.x - centerPoint.x;double yposition = vet2.y - centerPoint.y;double roationAngel = Math.Round(Math.Atan2(yposition, xposition), 2);if (roationAngel < 0)roationAngel = roationAngel + 360;//if (RecordLastAngel[i] == 0)   //第一次为空时，记录坐标，后面都是通过获取到的实时角度来和第一次记录的坐标，来进行计算，是正转还是反转RecordLastAngel[i] = roationAngel;//当前旋转的角度，负数为反转，正数为正转double newAngel = roationAngel - RecordLastAngel[i];//if (newAngel > 5 || newAngel < -5)//{text2.text += "编号：" + i.ToString() + "的坐标为" + centerPoint + "角度为:" + roationAngel + "旋转了：" + newAngel;MoveObj[i].transform.rotation = Quaternion.Euler(Vector3.forward * (float)newAngel);temprecordbool = true;//}//MoveObj[i].transform.Rotate(0f, 0f, 2f);//每一帧绕自身坐标轴Z轴旋转2度}//else//{//    //角度不对，即移出屏幕//    MoveObj[i].transform.position = new Vector2(-2000, -2000);//    MoveObj[i].transform.Rotate(0f, 0f, 0f);//    for (int ab = 0; ab < RecordLastAngel.Length; ab++)//    { RecordLastAngel[ab] = 0; }//}}}}}}}}/// <summary>/// 任意两点之间的长度/// </summary>/// <param name="p"></param>/// <param name="p2"></param>/// <returns></returns>double getPointBetweenLength(Vector2 p, Vector2 p2){double value = Math.Sqrt(Math.Abs(p.x - p2.x) * Math.Abs(p.x - p2.x) + Math.Abs(p.y - p2.y) * Math.Abs(p.y - p2.y));return Math.Round(value, 2);}string SanJiao(double b1, double b2, double b3){string ss = "";//首先判断能否组成三角形if (b1 + b2 > b3 && b1 + b3 > b2 && b2 + b3 > b1){//return "可以组成三角形";//判断是怎样的三角形，并输出if (b1 == b2 && b2 == b3){ss = "是等边三角形";}else if (b1 == b2 || b2 == b3 || b1 == b3)ss = "是等腰三角形";else if (b1 * b1 + b2 * b2 == b3 * b3 || b1 * b1 + b3 * b3 == b2 * b2 || b3 * b3 + b2 * b2 == b1 * b1)ss = "是直角三角形";}elsess = "输入的三边不能组成三角形";return ss;}//返回等腰三角形的顶角//但公式不能算出等腰三角形的顶角//令牌的三条边会有误差，正好不形成等腰三角，可以直接调用/// <summary>/// 计算角度/// </summary>/// <param name="a">长度最小的两条边</param>/// <param name="b">长度最小的两条边</param>/// <param name="c">最长的一条边长度</param>/// <returns></returns>double GetAngle(double a, double b, double c){try{double sss = Math.Acos((a * a + b * b - c * c) / (2 * a * b)) / Math.PI * 180;return sss;}catch { return 0; }}//获取三点的中心点Vector2 GetCiclePoint(Vector2 first, Vector2 second, Vector2 thrid){float tempA1;float tempA2, tempB1, tempB2;float tempC1, tempC2;float temp, x, y;tempA1 = first.x - first.x;tempB1 = first.y - second.y;tempC1 = float.Parse(((Math.Pow(first.x, 2) - Math.Pow(second.x, 2) + Math.Pow(first.y, 2) - Math.Pow(second.y, 2)) / 2).ToString());tempA2 = thrid.x - second.x;tempB2 = thrid.y - second.y;tempC2 = float.Parse(((Math.Pow(thrid.x, 2) - Math.Pow(second.x, 2) + Math.Pow(thrid.y, 2) - Math.Pow(second.y, 2)) / 2).ToString());temp = tempA1 * tempB2 - tempA2 * tempB1;if (temp == 0){x = first.x;y = first.y;}else{x = (tempC1 * tempB2 - tempC2 * tempB1) / temp;y = (tempA1 * tempC2 - tempA2 * tempC1) / temp;}return new Vector2(x, y);}void OnFingerDown(LeanFinger finger){//Debug.Log("Finger:" + finger.Index);//text2.text = text2.text + finger.TapCount + "\r\n";}void OnFingerUp(LeanFinger finger){//for (int i = 0; i < text2.Length; i++)//{//    text2[i].text = "";//}}void OnFingerSwipe(LeanFinger finger){//Debug.Log("FingerSwipe:" + finger.ScreenPosition);}public Text text3;void Update(){text3.text = MoveObj[0].transform.position.x.ToString()+","+ MoveObj[0].transform.position.y.ToString();//MoveObj[0].transform.Rotate(0f, 0f, 2f);//每一帧绕自身坐标轴Z轴旋转2度var fingers = LeanTouch.Fingers;//Debug.Log("update:" + fingers.Count);//text.text = text.text + fingers.ScreenPosition + "\r\n";//Debug.Log("Finger:" + LeanGesture.GetTwistDegrees());//LeanGesture.GetTwistDegrees();if (Input.GetKeyDown(KeyCode.D)){RecordPage.SetActive(!RecordPage.activeInHierarchy);}if (Input.GetKeyDown(KeyCode.W) && RecordPage.activeInHierarchy){if (fingers.Count == 3){//记录模块坐标double firstBian = getPointBetweenLength(fingers[1].ScreenPosition, fingers[2].ScreenPosition);double secondBian = getPointBetweenLength(fingers[2].ScreenPosition, fingers[3].ScreenPosition);double thridBian = getPointBetweenLength(fingers[1].ScreenPosition, fingers[3].ScreenPosition);double temp1 = firstBian - secondBian;double temp2 = firstBian - thridBian;double temp3 = secondBian - thridBian;string id = RecordPage.transform.GetChild(0).transform.GetChild(0).transform.GetComponent<Text>().text;if (temp1 <= 10 && temp1 >= -10){double angle = GetAngle(firstBian, secondBian, thridBian);ReadXml.readxml.UpdateXml(id, firstBian.ToString(), secondBian.ToString(), thridBian.ToString(), angle.ToString());}else if (temp2 <= 10 && temp2 >= -10){double angle = GetAngle(firstBian, thridBian, secondBian);ReadXml.readxml.UpdateXml(id, firstBian.ToString(), thridBian.ToString(), secondBian.ToString(), angle.ToString());}else if (temp3 <= 10 && temp3 >= -10){double angle = GetAngle(secondBian, thridBian, firstBian);ReadXml.readxml.UpdateXml(id, secondBian.ToString(), thridBian.ToString(), firstBian.ToString(), angle.ToString());}}}//allFingers.Clear();//allFingers.AddRange(LeanTouch.Fingers);//allFingers.AddRange(LeanTouch.InactiveFingers);//allFingers.Sort((a, b) => a.Index.CompareTo(b.Index));//for (var i = 0; i < allFingers.Count; i++)//{//    var finger = allFingers[i];//    //var progress = touch.TapThreshold > 0.0f ? finger.Age / touch.TapThreshold : 0.0f;//    //var style = GetFadingLabel(finger.Set, progress);//    //if (style.normal.textColor.a > 0.0f)//    //{//    var screenPosition = finger.ScreenPosition;//    var state = "UPDATE";//    if (finger.Down == true) state = "DOWN";//    if (finger.Up == true) state = "UP";//    if (finger.IsActive == false) state = "INACTIVE";//    if (finger.Expired == true) state = "EXPIRED";//    if (finger.Index != -42)//    {//        string sss = finger.Index + " - " + state + "  + " + Mathf.FloorToInt(screenPosition.x) + ", " + Mathf.FloorToInt(screenPosition.y);//    }//}}
}

以下是参考图片和链接