Shaker/Avalonia/ShakerApp/ViewModels/ShakerConfig/RandomConfigViewModel.cs

using Avalonia.Collections;
using Avalonia.Controls;
using Avalonia.Utilities;
using CommunityToolkit.Mvvm.Input;
using OxyPlot;
using OxyPlot.Series;
using Shaker.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace ShakerApp.ViewModels
{
    internal class RandomConfigViewModel : DisplayViewModelBase<Shaker.Models.RandomConfigModel>
    {
        public List<RandomData> RefSpectrum => datas;
        private RandomConfigViewModel()
        {
            Content = typeof(Views.RandomConfigView);
            #region 加速度谱曲线
            AccelerationModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                MaximumPadding = 0,
                MinimumPadding = 0,
                Title = App.Current?.FindResource(Shaker.Models.ShakerConstant.FrequencyKey) + "",
                Unit = "Hz",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Bottom,
                Key = "Freq"
            });
            AccelerationModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                Key = "Ampt",
                Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "",
                Unit = "g",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Left,
            });
            AccelerationModel.Title = App.Current?.FindResource(ShakerConstant.AccelerationSpectrumKey) + "";

            for (int i = 0; i < oxyColors.Count; i++)
            {
                LineSeries line = new LineSeries();
                line.Title = App.Current?.FindResource(ShakerConstant.SweepAccelerationSpectrumNames[i]) + "";
                line.Color = oxyColors[i];
                line.StrokeThickness = 1;
                line.DataFieldX = nameof(SweepData.Frequency);
                line.DataFieldY = properties[i];
                line.LineStyle = lineStyles[i];
                line.XAxisKey = "Freq";
                line.YAxisKey = "Ampt";
                lineSeries.Add(line);
                AccelerationModel.Series.Add(line);
            }
            AccelerationModel.Legends.Add(new OxyPlot.Legends.Legend()
            {
                ShowInvisibleSeries = true,
            });
            #endregion


            #region 速度

            VelocityModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                MaximumPadding = 0,
                MinimumPadding = 0,
                Title = App.Current?.FindResource(Shaker.Models.ShakerConstant.FrequencyKey) + "",
                Unit = "Hz",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Bottom,
                Key = "Freq"
            });
            VelocityModel.Title = App.Current?.FindResource(ShakerConstant.VelocityKey) + "";
            VelocityModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                Key = "Ampt",
                Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "",
                Unit = "m/s",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Left,
            });
            velocity = new LineSeries();
            velocity.Title = App.Current?.FindResource(ShakerConstant.VelocityKey) + "";
            velocity.Color = oxyColors[0];
            velocity.StrokeThickness = 1;
            velocity.DataFieldX = nameof(DataPoint.X);
            velocity.DataFieldY = nameof(DataPoint.Y);
            velocity.LineStyle = lineStyles[0];
            velocity.XAxisKey = "Freq";
            velocity.YAxisKey = "Ampt";
            VelocityModel.Series.Add(velocity);
            #endregion



            #region 位移
            DisplacementModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                MaximumPadding = 0,
                MinimumPadding = 0,
                Title = App.Current?.FindResource(Shaker.Models.ShakerConstant.FrequencyKey) + "",
                Unit = "Hz",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Bottom,
                Key = "Freq"
            });
            DisplacementModel.Title = App.Current?.FindResource(ShakerConstant.DisplacementKey) + "";
            DisplacementModel.Axes.Add(new OxyPlot.Axes.LogarithmicAxis()
            {
                Key = "Ampt",
                Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "",
                Unit = "mm",
                MajorGridlineStyle = LineStyle.Solid,
                Position = OxyPlot.Axes.AxisPosition.Left,
            });
            displacement = new LineSeries();
            displacement.Title = App.Current?.FindResource(ShakerConstant.DisplacementKey) + "";
            displacement.Color = oxyColors[0];
            displacement.StrokeThickness = 1;
            displacement.DataFieldX = nameof(DataPoint.X);
            displacement.DataFieldY = nameof(DataPoint.Y);
            displacement.LineStyle = lineStyles[0];
            displacement.XAxisKey = "Freq";
            displacement.YAxisKey = "Ampt";
            DisplacementModel.Series.Add(displacement);
            #endregion


            GetEvent(ShakerSettingViewModel.LANGUAGECHANGEDEVENT).Subscrip((_, _) =>
            {
                AccelerationModel.InvalidatePlot(false);
                AccelerationModel.Axes[0].Title = App.Current?.FindResource(ShakerConstant.FrequencyKey) + "";
                AccelerationModel.Axes[1].Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "";
                AccelerationModel.Title = App.Current?.FindResource(ShakerConstant.AccelerationSpectrumKey) + "";
                for (int i = 0; i < lineSeries.Count; i++)
                {
                    lineSeries[i].Title = App.Current?.FindResource(ShakerConstant.SweepAccelerationSpectrumNames[i]) + "";
                }
                AccelerationModel.InvalidatePlot(true);


                VelocityModel.InvalidatePlot(false);
                VelocityModel.Axes[0].Title = App.Current?.FindResource(ShakerConstant.FrequencyKey) + "";
                VelocityModel.Axes[1].Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "";
                VelocityModel.Title = App.Current?.FindResource(ShakerConstant.VelocityKey) + "";
                velocity.Title = App.Current?.FindResource(ShakerConstant.VelocityKey) + "";
                VelocityModel.InvalidatePlot(true);

                DisplacementModel.InvalidatePlot(false);
                DisplacementModel.Axes[0].Title = App.Current?.FindResource(ShakerConstant.FrequencyKey) + "";
                DisplacementModel.Axes[1].Title = App.Current?.FindResource(ShakerConstant.AmptAxisTitleKey) + "";
                DisplacementModel.Title = App.Current?.FindResource(ShakerConstant.DisplacementKey) + "";
                displacement.Title = App.Current?.FindResource(ShakerConstant.DisplacementKey) + "";
                DisplacementModel.InvalidatePlot(true);
            });
            GetEvent<AllConfig>().Subscrip((sender, args) =>
            {
                UpDateModel(args.Data.RandomConfig);
                CommunicationViewModel.Instance.LocalCommunication?.GetEvent<RandomConfigModel>()?.Subscrip((sender, args) =>
                {
                    UpDateModel(args.Data);
                    Refresh();
                    RandomMainPageViewModel.Instance.SetRefSpectrum(datas);
                    CommunicationViewModel.Instance.ServiceCommunication?.GetEvent<RandomConfigModel>()?.Publish(this, Model);
                });                
            });
            Identify.PropertyChanged += (_, _) => SaveIsEnabled = true;
        }
        static RandomConfigViewModel()
        {

        }

        [PropertyAssociation(nameof(RandomConfigModel.SpectrumItemsCount))]
        public uint SpectrumItemsCount => Model.SpectrumItemsCount;
        [PropertyAssociation(nameof(RandomConfigModel.HanningWindowCompensationCoefficient))]
        public double HanningWindowCompensationCoefficient { get => Model.HanningWindowCompensationCoefficient; set => SetProperty(ref Model.HanningWindowCompensationCoefficient, value); }
        [PropertyAssociation(nameof(RandomConfigModel.LinearAverage))]
        public uint LinearAverage { get => Model.LinearAverage; set => SetProperty(ref Model.LinearAverage, value); }
        [PropertyAssociation(nameof(RandomConfigModel.ExponentialAverage))]
        public uint ExponentialAverage { get => Model.ExponentialAverage; set => SetProperty(ref Model.ExponentialAverage, value); }
        [PropertyAssociation(nameof(RandomConfigModel.LinearAverage),nameof(RandomConfigModel.ExponentialAverage))]
        public uint DOF => (LinearAverage << 1) * ((ExponentialAverage << 1) - 1);
        [PropertyAssociation(nameof(RandomConfigModel.MaxFrequency),nameof(SpectrumLines))]
        public double FrequencyResolution => (double)MaxFrequency / (double)SpectrumLines;
        [PropertyAssociation(nameof(RandomConfigModel.RandomSampleRate))]
        public uint RandomSampleRate => Model.RandomSampleRate;
        List<OxyPlot.Series.LineSeries> lineSeries = new List<OxyPlot.Series.LineSeries>();
        List<DataPoint> velocitydata = new List<DataPoint>();
        LineSeries velocity = new LineSeries();

        LineSeries displacement = new LineSeries();
        List<DataPoint> displacementdata = new List<DataPoint>();
        List<OxyColor> oxyColors = new List<OxyColor>() { OxyColors.Green, OxyColors.Red, OxyColors.Red, OxyColors.Yellow, OxyColors.Yellow };
        List<LineStyle> lineStyles = new List<LineStyle>() { LineStyle.Solid, LineStyle.Solid, LineStyle.Solid, LineStyle.LongDashDotDot, LineStyle.LongDashDotDot };
        List<string> properties = new List<string>() { nameof(RandomData.TargetAcceleration), nameof(RandomData.UpStopAcceleration), nameof(RandomData.DownStopAcceleration), nameof(RandomData.UpWarnAcceleration), nameof(RandomData.DownWarnAcceleration) };
        List<RandomData> datas = new List<RandomData>();
        private double maxDisplacement;
        private double maxVelocity;
        private bool canResetRMS = false;
        private double resetRMS;

        [PropertyAssociation(nameof(RandomConfigModel.MaxFrequency))]
        public RandomMaxFrequency MaxFrequency
        { 
            get => Model.MaxFrequency;
            set
            {
                SetProperty(ref Model.MaxFrequency, value);
                OnPropertyChanged(nameof(FFTLength));
            }
        }

        public bool CanResetRMS { get => canResetRMS; set =>SetProperty(ref canResetRMS, value); }
        public double ResetRMS { get => resetRMS; set =>SetProperty(ref resetRMS , value); }
        [PropertyAssociation(nameof(RandomConfigModel.SynthesisType))]
        public AccelerationSynthesisType SynthesisType { get => Model.SynthesisType; set => SetProperty(ref Model.SynthesisType, value); }
        [PropertyAssociation(nameof(RandomConfigModel.MinFrequency))]
        public double MinFrequency { get => Model.MinFrequency; set => SetProperty(ref Model.MinFrequency, value); }
        [PropertyAssociation(nameof(RandomConfigModel.SpectrumLines))]
        public SpectrumLines SpectrumLines
        {
            get => Model.SpectrumLines;
            set
            {
                SetProperty(ref Model.SpectrumLines, value);
                OnPropertyChanged(nameof(FFTLength));
            }
        }
        [PropertyAssociation(nameof(RandomConfigModel.Sigma))]
        public double Sigma { get => Model.Sigma; set => SetProperty(ref Model.Sigma, value); }

        [PropertyAssociation(nameof(RandomConfigModel.RandomSampleRate),nameof(RandomConfigModel.MaxFrequency),nameof(RandomConfigModel.SpectrumLines))]
        public uint FFTLength => (uint)(Model.RandomSampleRate / (float)MaxFrequency * (uint)SpectrumLines);
        [PropertyAssociation(nameof(RandomConfigModel.RandomSampleRate), nameof(RandomConfigModel.MaxFrequency), nameof(RandomConfigModel.SpectrumLines))]
        public uint FFTHalfLength => FFTLength >> 1;
        public RandomIdentifyViewModel Identify { get; } = new RandomIdentifyViewModel();
        public AvaloniaList<IndexValueItemViewModel<RandomSpectrumItemViewModel>> SpectrumItems { get; }= new AvaloniaList<IndexValueItemViewModel<RandomSpectrumItemViewModel>>();
        public AvaloniaList<IndexValueItemViewModel<RandomPlanItemViewModel>> PlanItems { get; } = new AvaloniaList<IndexValueItemViewModel<RandomPlanItemViewModel>>();
        [PropertyAssociation(nameof(RandomConfigModel.StopLins))]
        public uint StopLins { get => Model.StopLins; set => SetProperty(ref Model.StopLins, value); }
        [PropertyAssociation(nameof(RandomConfigModel.WarnLines))]
        public uint WarnLines { get => Model.WarnLines; set => SetProperty(ref Model.WarnLines, value); }
        [PropertyAssociation(nameof(RandomConfigModel.StopRMS))]
        public double StopRMS { get => Model.StopRMS; set => SetProperty(ref Model.StopRMS, value); }
        public OxyPlot.PlotModel AccelerationModel { get; } = new OxyPlot.PlotModel();

        public PlotModel DisplacementModel { get; } = new PlotModel();
        public PlotModel VelocityModel { get; } = new PlotModel();
        public static RandomConfigViewModel Instance { get; } = new RandomConfigViewModel();
        [PropertyAssociation(nameof(RandomConfigModel.Sigma))]
        public double MaxAcceleration => RMSAcceleration * Sigma;
        public double MaxDisplacement { get => maxDisplacement; set =>SetProperty(ref maxDisplacement , value); }
        public double MaxVelocity { get => maxVelocity; set =>SetProperty(ref maxVelocity , value); }
        public bool AccelerationOverLimit => MaxAcceleration >= ShakerConfigViewModel.Instance.MaxAcceleration;
        public bool DisplacementOverLimit => MaxDisplacement > ShakerConfigViewModel.Instance.MaxDisplacement;
        public bool VelocityOverLimit => MaxVelocity > ShakerConfigViewModel.Instance.MaxVelocity;
        public double AccelerationLoad => Math.Round(MaxAcceleration / ShakerConfigViewModel.Instance.MaxAcceleration * 100f, 2);
        public double DisplacementLoad => Math.Round((double)MaxDisplacement / ShakerConfigViewModel.Instance.MaxDisplacement * 100f, 2);
        public double VelocityLoad => Math.Round((double)MaxVelocity / ShakerConfigViewModel.Instance.MaxVelocity * 100f, 2);


        public double RMSAcceleration { get => Model.RMSAcceleration; set =>SetProperty(ref Model.RMSAcceleration , value); }

        public ICommand AddCommand => new RelayCommand(Add);
        public override void UpDateModel(RandomConfigModel model)
        {
            SpectrumItems.Clear();
            PlanItems.Clear();
            for(int i=0;i<model.SpectrumItems.Count;i++)
            {
                SpectrumItems.Add(new IndexValueItemViewModel<RandomSpectrumItemViewModel>(i + 1, new RandomSpectrumItemViewModel(model.SpectrumItems[i])));
            }
            for(int i=0;i<model.PlanItems.Count;i++)
            {
                PlanItems.Add(new IndexValueItemViewModel<RandomPlanItemViewModel>(i + 1, new RandomPlanItemViewModel(model.PlanItems[i])));
            }
            Identify.UpDateModel(model.Identify);
            base.UpDateModel(model);

        }
        private void Add()
        {
            if (SpectrumItems.Count >= SpectrumItemsCount) return;
            if (Model.SpectrumItems.Count == 0) Model.SpectrumItems.Add(new RandomSpectrumItemModel());
            else Model.SpectrumItems.Add(Model.SpectrumItems[^1].CloneBase());
            SpectrumItems.Add(new IndexValueItemViewModel<RandomSpectrumItemViewModel>(SpectrumItems.Count + 1, new RandomSpectrumItemViewModel(Model.SpectrumItems[^1])));
        }
        public ICommand DeleteCommand => new RelayCommand(Delete);
        private void Delete()
        {
            if (SpectrumItems.Count == 0) return;
            if(Model.SpectrumItems.Count>0)
            {
                Model.SpectrumItems.RemoveAt(Model.SpectrumItems.Count - 1);
            }
            SpectrumItems.RemoveAt(SpectrumItems.Count - 1);
        }
        public ICommand ResetRMSCommand=>new RelayCommand(ResetRMSExecute);
        private void ResetRMSExecute()
        {
            if (!CanResetRMS) return;
            if (ResetRMS <= 0) return;
            for(int i=0;i<SpectrumItems.Count;i++)
            {
                SpectrumItems[i].Value.Value *= (ResetRMS*ResetRMS)/(RMSAcceleration * RMSAcceleration);
                Model.SpectrumItems[i].Value = SpectrumItems[i].Value.Value;
            }
            CanResetRMS = false;
            RefreshCommand?.CanExecute(null);
        }


        public ICommand AddPlanCommand => new RelayCommand(AddPlan);
        private void AddPlan()
        {
            if (PlanItems.Count >= 10 || Model.PlanItems.Count>=10) return;
            if (Model.PlanItems.Count == 0) Model.PlanItems.Add(new RandomPlanItemModel());
            else Model.PlanItems.Add(Model.PlanItems[^1].CloneBase());
            PlanItems.Add(new IndexValueItemViewModel<RandomPlanItemViewModel>(PlanItems.Count + 1, new RandomPlanItemViewModel(Model.PlanItems[^1])));
        }
        public ICommand DeletePlanCommand => new RelayCommand(DeletePlan);
        private void DeletePlan()
        {
            if (PlanItems.Count == 0) return;
            if(Model.PlanItems.Count==0)
            {
                Model.PlanItems.RemoveAt(Model.PlanItems.Count - 1);
            }
            PlanItems.RemoveAt(PlanItems.Count - 1);
        }
        public ICommand RefreshPlanCommand => new RelayCommand(RefreshPlan);
        private void RefreshPlan()
        {
            if (PlanItems.Count < 1) return;
        }
        public ICommand RefreshCommand => new RelayCommand(Refresh);
        private unsafe void Refresh()
        {
            if (SpectrumItems.Count < 3) return;
            var items = SpectrumItems.Select(x => x.Value.Model.CloneBase()).DistinctBy(x => x.Frequency).OrderBy(x => x.Frequency).ToList();
            SpectrumItems.Clear();
            for(int i=0;i<items.Count;i++)
            {
                SpectrumItems.Add(new IndexValueItemViewModel<RandomSpectrumItemViewModel>(i + 1, new RandomSpectrumItemViewModel(items[i])));
            }
            if (items.Count < 3) return;
            CalcRefSpectrum(items.Select(x => x.Frequency).ToArray(), items.Select(x => x.Value).ToArray(), items.Select(x => x.ValueType).ToArray(), FrequencyResolution,out var fy_array,out var f,out var turningfreq);
            if (fy_array.Length == 0) return;
            this.Model.SpectralTables.Clear();
            for(int i=0;i<turningfreq.Length;i++)
            {
                this.Model.SpectralTables.Add(new RandomSpectralTableModel()
                {
                    TurningFrequency = turningfreq[i],
                    TurningValue = fy_array[(int)((turningfreq[i]-SpectrumItems[0].Value.Frequency)/FrequencyResolution)],
                });
            }
            RMSAcceleration = Math.Sqrt(ViewModels.MainViewModel.Default.Calc.Sum.Sum(ref fy_array[0], (uint)fy_array.Length) * FrequencyResolution);
            ResetRMS = RMSAcceleration;
            double[] f2 = new double[f.Length];
            double[] fv = new double[f.Length];
            MainViewModel.Default.Calc.Multiply.Multiply(ref f[0], ref f[0], (uint)f.Length,ref f2[0]);
            MainViewModel.Default.Calc.Division.Division(ref fy_array[0],ref  f2[0],  (uint)f.Length,ref fv[0]);
            double sum = MainViewModel.Default.Calc.Sum.Sum(ref fv[0], (uint)fv.Length);
            MaxVelocity = Math.Sqrt((sum - (fv[0] + fv[^1] / 2) / 2) * FrequencyResolution) / (2 * Math.PI) * Sigma * 9.8f;
            MainViewModel.Default.Calc.Division.Division(ref fv[0], ref f2[0], (uint)f.Length, ref fv[0]);
            sum = MainViewModel.Default.Calc.Sum.Sum(ref fv[0], (uint)fv.Length);
            MaxDisplacement = Math.Sqrt((sum - (fv[0] + fv[^1] / 2) / 2) * FrequencyResolution) / (2 * Math.PI*2*Math.PI) * Sigma * 9800f;
            OnPropertyChanged(nameof(MaxAcceleration));
            double[,] spectrumdata = new double[5, f.Length];
            Unsafe.CopyBlock(ref Unsafe.As<double, byte>(ref spectrumdata[0, 0]), ref Unsafe.As<double, byte>(ref fy_array[0]), (uint)(Unsafe.SizeOf<double>() * fy_array.Length));
            CalcSpectrum(items, f, fy_array, FrequencyResolution, turningfreq, ref spectrumdata);
            datas.Clear();
            velocitydata.Clear();
            displacementdata.Clear();
            for (int i=0;i<f.Length;i++)
            {
                datas.Add(new RandomData(f[i],double.NaN, double.NaN, spectrumdata[0, i], spectrumdata[1, i], spectrumdata[3, i], spectrumdata[2, i], spectrumdata[4,i]));
                velocitydata.Add(new DataPoint(f[i], Shaker.Models.Tools.Tools.AccelerationToVelocity(spectrumdata[0, i], f[i])));
                displacementdata.Add(new DataPoint(f[i], Shaker.Models.Tools.Tools.AccelerationToDisplacement(spectrumdata[0, i], f[i])));
            }
            AccelerationModel.InvalidatePlot(false);
            VelocityModel.InvalidatePlot(false);
            DisplacementModel.InvalidatePlot(false);
            for (int i = 0; i < lineSeries.Count; i++)
            {
                lineSeries[i].ItemsSource = datas;
            }
            velocity.ItemsSource = velocitydata;
            displacement.ItemsSource = displacementdata;
            AccelerationModel.InvalidatePlot(true);
            VelocityModel.InvalidatePlot(true);
            DisplacementModel.InvalidatePlot(true);
            CanResetRMS = true;
        }
        private void CalcSpectrum(List<RandomSpectrumItemModel> models, [In] double[] f, [In] double[] fy_array, [In] double deltaf, [In] double[] turn_freq,ref double[,] spectrumdata)
        {
            CalcItemSpectrum(models.Select(x => x.UpStop).ToArray(), f, fy_array, deltaf, turn_freq, ref spectrumdata[1, 0]);
            CalcItemSpectrum(models.Select(x => x.UpWarn).ToArray(), f, fy_array, deltaf, turn_freq, ref spectrumdata[2, 0]);  
            CalcItemSpectrum(models.Select(x => x.DownStop).ToArray(), f, fy_array, deltaf, turn_freq, ref spectrumdata[3, 0]);
            CalcItemSpectrum(models.Select(x => x.DownWarn).ToArray(), f, fy_array, deltaf, turn_freq, ref spectrumdata[4, 0]);
        }
        private void CalcItemSpectrum(double[] offset, [In] double[] f, [In] double[] fy_array, [In] double deltaf, [In] double[] turn_freq, ref double spectrumdata)
        {
            for (int i = 0; i < offset.Length - 1; i++)
            {
                int index = (int)((turn_freq[i] - turn_freq[0]) / deltaf);
                uint len = (uint)((turn_freq[i + 1] - turn_freq[i]) / deltaf);
                if (offset[i+1] == offset[i])
                {
                    var x = Math.Pow(10, offset[i] / 10);
                    MainViewModel.Default.Calc.Multiply.Multiply(ref fy_array[index], x, len, ref Unsafe.Add(ref spectrumdata,index));
                }
                else
                {
                    double db1_psd = Math.Pow(10, offset[i] / 10) * fy_array[index];
                    double db2_psd = Math.Pow(10, offset[i + 1] / 10) * fy_array[index+len];
                    var x= Math.Log10(db2_psd / db1_psd) / (Math.Log2(turn_freq[i + 1] / turn_freq[i])) * 10;
                    for(int j=0;j<len;j++)
                    {
                        ref double result = ref Unsafe.Add(ref spectrumdata, index + j);
                       result =  Math.Pow(10, Math.Log2(f[index + j] / turn_freq[i]) * x / 10) * db1_psd;
                    }
                }
            }
            ref double temp = ref Unsafe.Add(ref spectrumdata, fy_array.Length - 1);
            temp = Math.Pow(10, offset[^1] / 10) * fy_array[^1];
        }
        private void CalcRefSpectrum(double[] f_array, double[] y_array, RandomValueType[] k_array, double deltaf ,out double[] fy_array,out double[] f,out double[] turningfreq)
        {
            int n=f_array.Length;
            // 计算圆整频率值及其对应的谱值
            double[] round_f = new double[n];
            double[] round_y = new double[n];
            turningfreq = new double[n];
            for (int i = 0; i < n; i++)
            {
                round_f[i] = Math.Ceiling(f_array[i] / deltaf) * deltaf;
                turningfreq[i] = round_f[i];
            }

            // 若第一个点值未知时，需先计算第一个点的值
            if (k_array[0] ==  RandomValueType.Slope && k_array[1] ==  RandomValueType.Slope)
            {
                y_array[0] = y_array[1];
            }

            if (k_array[0] ==  RandomValueType.Slope && k_array[1] ==  RandomValueType.Value)
            {
                k_array[0] = 0;
                y_array[0] = y_array[1];
            }

            if (k_array[0] ==  RandomValueType.Slope)
            {
                double kk = y_array[1];
                y_array[0] = y_array[2] / (Math.Pow(10, kk / 10 * Math.Log(f_array[1] / f_array[0], 2)));
                y_array[1] = y_array[2];
                k_array[0] = 0;
                k_array[1] = 0;
            }

            // 计算第二点及其后点的值
            for (int i = 1; i < n; i++)
            {
                if (f_array[i] == 0)
                {
                    double kk = y_array[i];
                    y_array[i] = y_array[i + 1];
                    f_array[i] = Math.Pow(2, (10 * Math.Log(y_array[i + 1] / y_array[i - 1], 10) / kk)) * f_array[i - 1];
                }
                else
                {
                    if (k_array[i] ==  RandomValueType.Slope)
                    {
                        y_array[i] = Math.Pow(10, y_array[i] / 10 * Math.Log(f_array[i] / f_array[i - 1], 2)) * y_array[i - 1];
                        k_array[i] = 0;
                    }
                }
            }

            // 验证结果值
            double[] k_exam = new double[n - 1];
            for (int i = 0; i < n; i++)
            {
                if (i < n - 1)
                {
                    k_exam[i] = 10 * Math.Log(y_array[i + 1] / y_array[i], 10) / Math.Log(f_array[i + 1] / f_array[i], 2);
                }
            }

            // 计算圆整后频率对应的谱值
            for (int i = 0; i < n; i++)
            {
                if (round_f[i] == f_array[i])
                {
                    round_y[i] = y_array[i];
                }

                if (i < n - 1)
                {
                    if (round_f[i] > f_array[i])
                    {
                        round_y[i] = Math.Pow(10, k_exam[i] / 10 * Math.Log(round_f[i] / f_array[i], 2)) * y_array[i];
                    }
                }

                if (i == n - 1)
                {
                    round_y[i] = Math.Pow(10, k_exam[i - 1] / 10 * Math.Log(round_f[i] / f_array[i], 2)) * y_array[i];
                }

                if (round_f[i] < f_array[i])
                {
                    round_y[i] = Math.Pow(10, k_exam[i - 1] / 10 * Math.Log(f_array[i] / round_f[i], 2)) * y_array[i];
                }
            }

            int parts = k_exam.Length; // 将谱按斜率分成几段，parts为总的段数\
            f = Enumerable.Range(0, (int)((round_f[n - 1] - round_f[0]) / deltaf) + 1).Select(x => x * deltaf + round_f[0]).ToArray();
            fy_array =new double[f.Length];
            fy_array[0] = round_y[0];
            fy_array[^1] = round_y[^1];
            int part_begin = 0;

            for (int i = 0; i < parts; i++)
            {
                fy_array[part_begin] = round_y[i];
                int n_part = (int)Math.Round((round_f[i + 1] - round_f[i]) / deltaf);

                if (k_exam[i] == 0)
                {
                    for (int k = part_begin + 1; k <= part_begin + n_part; k++)
                    {
                        fy_array[k] = fy_array[k - 1];
                    }
                }
                else
                {
                    if (n_part > 0)
                    {
                        for (int k = part_begin + 1; k <= part_begin + n_part; k++)
                        {
                            fy_array[k] = Math.Pow(10, k_exam[i] / 10 * Math.Log(f[k] / f[k - 1], 2)) * fy_array[k - 1];
                        }
                    }
                }

                part_begin += n_part;
            }
        }
        protected override void Save()
        {
            base.Save();
            CommunicationViewModel.Instance.LocalCommunication?.GetEvent<RandomConfigModel>()?.Publish(this, Model);
            CommunicationViewModel.Instance.ServiceCommunication?.GetEvent<RandomConfigModel>()?.Publish(this, Model);
            RandomMainPageViewModel.Instance.SetRefSpectrum(datas);
        }

    }


}