Group.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;

namespace EasingPathPositionCalculator;

// 起点、终点、beat、BPM、采集密度
public class Group
{
    private List<Point> _points = [];
    public IReadOnlyList<Point> Points => _points.AsReadOnly();
    public int Count => _points.Count;

    public string GroupName { get; set; } = "unnamed";
    public static short GroupSum = 0;
    public short GroupUID;

    public double StartX { get; set; }
    public double EndX { get; set; }
    public double Duration { get; set; }
    public EasingType Easing { get; set; }
    public int Density { get; set; }

    public Group(string GroupName = "unnamed")
    {
        this.GroupName = GroupName;
        GroupSum++;
        GroupUID = GroupSum;
    }

    public IEnumerable<string> Traverse()
    {
        foreach (var point in _points)
            yield return point.ToString();
    }

    public void CalcPoints()
    {
        _points.Clear();
        double totalChangeX = EndX - StartX;
        Log.Debug($"调试: StartX={StartX}, EndX={EndX}, totalChangeX={totalChangeX}");
        Log.Debug($"调试: Duration={Duration}, Density={Density}");

        for (int i = 0; i <= Duration * Density; i++)
        {
            double currentY = i / (double)Density;
            if (currentY > Duration) break;

            double currentX = EasingCalc.CalculateEasing(
                Easing,
                currentY,
                StartX,
                totalChangeX,
                Duration
            );

            Log.Debug($"调试: i={i}, currentY={currentY}, currentX={currentX}");
            // 计算整数拍数和分数部分
            int beatNumber = (int)Math.Floor(currentY);  // 整数拍数
            int subBeatIndex = i % Density;              // 在当前拍内的索引

            _points.Add(new Point(currentX, beatNumber, (subBeatIndex, Density)));
        }

        Log.Debug($"调试: 总共生成 {_points.Count} 个点");

        // 添加调试输出查看所有点
        Log.Debug("所有点的详细信息:");
        for (int i = 0; i < _points.Count; i++)
        {
            var point = _points[i];
            Log.Debug($"点 {i}: {point}");
        }
    }
    public override string ToString()
    => $"({GroupUID}){GroupName} X[{StartX} ~ {EndX}] 长度:{Duration} 密度:{Density} {Easing}({(int)Easing})";
}