powerfun-unity/Assets/Scenes/Ride/Scripts/Helper.cs

using Assets.Scenes.Ride.Scripts.Model;
using Assets.Scripts;
using Assets.Scripts.Apis.Models;
using System;
using System.Text;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;

namespace Assets.Scenes.Ride.Scripts
{
    public class Helper
    {
        public static string CreateDirectoryIfNotExsit(string path)
        {
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            return path;
        }

        public static void DelectDir(string srcPath)
        {
            try
            {
                if (!Directory.Exists(srcPath))
                    return;
                DirectoryInfo dir = new DirectoryInfo(srcPath);
                FileSystemInfo[] fileinfo = dir.GetFileSystemInfos();  //返回目录中所有文件和子目录
                foreach (FileSystemInfo i in fileinfo)
                {
                    if (i is DirectoryInfo)            //判断是否文件夹
                    {
                        DirectoryInfo subdir = new DirectoryInfo(i.FullName);
                        subdir.Delete(true);          //删除子目录和文件
                    }
                    else
                    {
                        File.Delete(i.FullName);      //删除指定文件
                    }
                }
                //删除当前文件夹 
                Directory.Delete(srcPath);
            }
            catch (Exception e)
            {
                throw;
            }
        }
        public static double AveragePower(IList<TargetData> list)
        {
            return Math.Floor(list.Where(p => p._Power > -1).Average(a => a._Power));
        }
        /// <summary>
        /// 优化功率
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static double GetNP(List<TargetData> list)
        {
            var _npinterval = new List<double>();
            var count = list.Count / 28;
            for (int i = 0; i < count; i++)
            {
                var list1 = list.Skip(i * 28).Take(28);
                double avgpower = Math.Pow((int)list1.Where(d => d._Power > -1).Average(a => a._Power), 4);
                _npinterval.Add(avgpower);
            }
            double n = 0.25;
            if (_npinterval.Count == 0) return 0;
            return Math.Pow((_npinterval.Sum() / _npinterval.Count), n);
        }

        /// <summary>
        /// 获取Ftp 
        /// </summary>
        /// <returns></returns>
        public static int GetFtp()
        {
            return App.CurrentUser.FTP;
        }

        public static string FormatTicks(int seconds)
        {
            int h, m, s;
            h = seconds / 3600;
            m = (seconds - (3600 * h)) / 60;
            s = seconds - (3600 * h + 60 * m);
            string H, M, S;
            H = M = S = string.Empty;
            if (h < 10)
                H = "0" + h;
            else
                H = h.ToString();
            if (m < 10)
                M = "0" + m;
            else
                M = m.ToString();
            if (s < 10)
                S = "0" + s;
            else
                S = s.ToString();
            return $"{H}:{M}:{S}";
        }
        /// <summary>
        /// 计算速度
        /// 参考 http://bikecalculator.com/index.html
        /// </summary>
        /// <param name="elevationv">海拔</param>
        /// <param name="gradev">坡度%</param>
        /// <param name="powerv">功率</param>
        /// <param name="rweightv">体重</param>
        /// <param name="bweightv">自行车重量</param>
        /// <returns>km/h</returns>
        public static double CalculateSpeed(double elevationv, double gradev, double powerv, double rweightv, double bweightv)
        {
            if (powerv < 0)
            {
                return 0;
            }
            if (gradev < -10)
            {
                gradev = -10;
            }
            var tireValues = new double[] { 0.005, 0.004, 0.012 };
            var aeroValues = new double[] { 0.388, 0.445, 0.420, 0.300, 0.233, 0.200 };
            var units = 0;

            //温度
            var temperaturev = 25;

            //海拔
            //var elevationv = 100;

            //坡度
            //var gradev = 6 * 0.01 * -1;

            //风，转换成m/s
            var headwindv = 0 / 3.6;

            var frontalArea = aeroValues[0];

            var transv = 0.95; // no one knows what this is, so why bother presenting a choice?
            var rollingRes = tireValues[0];

            //应该是空气密度
            var density = (1.293 - 0.00426 * temperaturev) * Math.Exp(-elevationv / 7000.0);


            //全空气阻力参数
            var a2 = 0.5 * frontalArea * density;   // full air resistance parameter
            var twt = 9.8 * (rweightv + bweightv);  // total weight in newtons
            var tres = twt * (gradev * 0.01 + rollingRes); // gravity and rolling resistance

            //var powerv = 195;

            var v = Newton(a2, headwindv, tres, transv, powerv) * 3.6;// convert to km/h

            //Trace.WriteLine($"速度为：{ v }");

            var t1 = makeDecimal2(v * (units == 1 ? 1.609 : 1.0));
            return double.Parse(t1, CultureInfo.InvariantCulture);
        }
        private static double Newton(double aero, double hw, double tr, double tran, double p)
        {
            var vel = 20D;
            var MAX = 10;
            var TOL = 0.05;
            for (int i = 0; i < MAX; i++)
            {
                var tv = vel + hw;
                var aeroEff = (tv > 0.0) ? aero : -aero; // wind in face, must reverse effect
                var f = vel * (aeroEff * tv * tv + tr) - tran * p; // the function
                var fp = aeroEff * (3.0 * vel + hw) * tv + tr;     // the derivative
                var vNew = vel - f / fp;
                if (Math.Abs(vNew - vel) < TOL)
                {
                    return vNew;  // success
                }
                vel = vNew;
            }
            return 0.0;
        }
        private static string makeDecimal2(double value)
        {
            if (value != 0)
            {
                var x = Math.Round(value * 100);
                int d;
                if (x < 100)
                {
                    d = 0;
                }
                else
                {
                    d = Convert.ToInt32(Math.Floor(x / 100), CultureInfo.InvariantCulture);
                };
                var c = x % 100;
                var g = (c >= 10) ? "" : "0";
                return "" + d + "." + g + c;
            }
            return value.ToString(CultureInfo.InvariantCulture);
        }

        /// <summary>
        /// Decode google style polyline coordinates.
        /// </summary>
        /// <param name="encodedPoints"></param>
        /// <returns></returns>
        private static IEnumerable<CoordinateEntity> Decode(string encodedPoints)
        {
            if (string.IsNullOrEmpty(encodedPoints))
                throw new ArgumentNullException("encodedPoints");

            char[] polylineChars = encodedPoints.ToCharArray();
            int index = 0;

            int currentLat = 0;
            int currentLng = 0;
            int next5bits;
            int sum;
            int shifter;

            while (index < polylineChars.Length)
            {
                // calculate next latitude
                sum = 0;
                shifter = 0;
                do
                {
                    next5bits = (int)polylineChars[index++] - 63;
                    sum |= (next5bits & 31) << shifter;
                    shifter += 5;
                } while (next5bits >= 32 && index < polylineChars.Length);

                if (index >= polylineChars.Length)
                    break;

                currentLat += (sum & 1) == 1 ? ~(sum >> 1) : (sum >> 1);

                //calculate next longitude
                sum = 0;
                shifter = 0;
                do
                {
                    next5bits = (int)polylineChars[index++] - 63;
                    sum |= (next5bits & 31) << shifter;
                    shifter += 5;
                } while (next5bits >= 32 && index < polylineChars.Length);

                if (index >= polylineChars.Length && next5bits >= 32)
                    break;

                currentLng += (sum & 1) == 1 ? ~(sum >> 1) : (sum >> 1);

                yield return new CoordinateEntity
                {
                    Latitude = Convert.ToDouble(currentLat) / 1E5,
                    Longitude = Convert.ToDouble(currentLng) / 1E5
                };
            }
        }

        /// <summary>
        /// Encode it
        /// </summary>
        /// <param name="points"></param>
        /// <returns></returns>
        private static string Encode(IEnumerable<CoordinateEntity> points)
        {
            var str = new StringBuilder();

            var encodeDiff = (Action<int>)(diff =>
            {
                int shifted = diff << 1;
                if (diff < 0)
                    shifted = ~shifted;

                int rem = shifted;

                while (rem >= 0x20)
                {
                    str.Append((char)((0x20 | (rem & 0x1f)) + 63));

                    rem >>= 5;
                }

                str.Append((char)(rem + 63));
            });

            int lastLat = 0;
            int lastLng = 0;

            foreach (var point in points)
            {
                int lat = (int)Math.Round(point.Latitude * 1E5);
                int lng = (int)Math.Round(point.Longitude * 1E5);

                encodeDiff(lat - lastLat);
                encodeDiff(lng - lastLng);

                lastLat = lat;
                lastLng = lng;
            }

            return str.ToString();
        }
        public struct CoordinateEntity
        {
            public double Latitude;
            public double Longitude;
            public CoordinateEntity(double x, double y) { this.Latitude = x; this.Longitude = y; }
        }

        public static async Task<byte[]> DownloadImgAsync(List<MapDataModel.Item> list)
        {
            var result = new List<CoordinateEntity>();
            var count = list.Count;
            int segement = (int)Math.Ceiling((double)(count / 1000D));

            for (int i = 0; i <= count - 1; i++)
            {
                if (i % segement == 0)
                {
                    result.Add(new CoordinateEntity
                    {
                        Latitude = Math.Round(list[i].Point[0], 6),
                        Longitude = Math.Round(list[i].Point[1], 6),
                    });
                }
            }
            return await DownloadImgAsync(result);
        }

        public static async Task<byte[]> DownloadImgAsync(List<CoordinateEntity> list)
        {
            var polyline = Encode(list);
            var encodeline = UnityWebRequest.EscapeURL(polyline); //HttpUtility.UrlEncode(polyline);
            //获取封面图片
            var url = $"https://api.mapbox.com/styles/v1/juzetest/ckmkdjwsa1nvt17nr1ps4fqgs/static/path-4+fff-1({encodeline})/auto/1280x1280?access_token={App.MapBoxAccessToken}";
            HttpClient c = new HttpClient();
            var response = await c.GetAsync(url);
            if (response.StatusCode == System.Net.HttpStatusCode.OK)
            {
                byte[] content = await response.Content.ReadAsByteArrayAsync();
                return content;
            }

            return null;
        }

        public static string GetMapboxApiUrl(List<MapDataModel.Item> list)
        {
            var result = new List<CoordinateEntity>();
            var count = list.Count;
            int segement = (int)Math.Ceiling((double)(count / 1000D));

            for (int i = 0; i <= count - 1; i++)
            {
                if (i % segement == 0)
                {
                    result.Add(new CoordinateEntity
                    {
                        Latitude = Math.Round(list[i].Point[0], 6),
                        Longitude = Math.Round(list[i].Point[1], 6),
                    });
                }
            }


            var polyline = Encode(result);
            var encodeline = UnityWebRequest.EscapeURL(polyline); //HttpUtility.UrlEncode(polyline);
            //获取封面图片
            var url = $"https://api.mapbox.com/styles/v1/juzetest/ckmkdjwsa1nvt17nr1ps4fqgs/static/path-4+fff-1({encodeline})/auto/1280x768?access_token={App.MapBoxAccessToken}&padding=200&pitch=30";
            return url;
        }
    }
}