96 lines
3.4 KiB
C#
96 lines
3.4 KiB
C#
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using Unity.VisualScripting;
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/// <summary>
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/// BPM组单元，用于储存对应时间组的物件速度变化，与乐曲相关
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/// </summary>
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public class BPMGroup
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{
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/*关于时间组与BPM变换的机制
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*BPM变换是一种用来完成适应中间有BPM变换的歌曲的一种机制
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*其原理是通过控制当前BPM的基准BPM的比值，使得NoteSpeed得以变化
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*当BPM变换到比原定的数值更大时，那么音符的速度将会更快
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*当BPM变换到比原定的数值更小时，那么音符的速度将会更慢
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*
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*但是将这种变换设置为全局的是不合适的，因此我们从数据上为Note划分组别
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*使得每一个时间组都可以被单独控制
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*我们将在控制器重创建一个列表，统一管理列表中的所有时间组单元
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*在每一个物件被实例化时，它将被传递对应的时间组单元的引用
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*
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*每一个时间组单元通过更新自身存储的NoteSpeed以达到控制Note的效果
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*因为每一个被创建的物件实例都会不断的通过NoteSpeed更新自身位置
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*
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*由于时间组条数通常在100这个数量级以内，选择字典结构去管理是相对合适的
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*/
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/// <summary>
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/// 当前BPM组的NoteSpeed
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/// </summary>
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public float CurrentNoteSpeed
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{
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get
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{
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if (CurrentBPM == 0) return 0;
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//单位向量*基础速度*音符流速*BPM/基准BPM
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return _noteStream * CurrentBPM * _baseSpeed / _baseBPM;
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}
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}
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private float _noteStream;
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private float _baseSpeed;
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private float _baseBPM;
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/// <summary>
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/// 每拍的时间长度（秒）
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/// </summary>
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public float Beat
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{
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get
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{
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return CurrentBPM > 0 ? 60f / CurrentBPM : 0f;
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}
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}
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/// <summary>
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/// 音符相对当前BPM的抵达下落目标所需时间,单位:ms
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/// </summary>
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public float InitializeOffset
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{
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get
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{
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if (CurrentNoteSpeed == 0) return 0;
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//到达目标点的时间
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return TrackLength / CurrentNoteSpeed;
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}
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}
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/// <summary>
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/// 轨道长度,该值应当添加至游戏主控变成玩家偏好设置
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/// </summary>
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private float TrackLength;
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public float CurrentBPM { set; get; }
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public int GroupNum { get; }
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public BPMGroup(float currentBPM, int groupNum, float noteStream, float baseSpeed, float baseBPM, float trackLength)
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{
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CurrentBPM = currentBPM;
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GroupNum = groupNum;
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_noteStream = noteStream;
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_baseSpeed = baseSpeed;
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_baseBPM = baseBPM;
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TrackLength = trackLength;
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}
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public void UpdatePlayerSetting(float noteStream, float baseSpeed, float baseBPM, float trackLength)
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{
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_noteStream = noteStream;
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_baseSpeed = baseSpeed;
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_baseBPM = baseBPM;
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TrackLength = trackLength;
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}
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public override string ToString()
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{
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return $"BPMGroup [Group: {GroupNum}]\n" +
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$"BPM: {CurrentBPM}\n" +
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$"Beat: {Beat:F3}s\n" +
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$"NoteSpeed: {CurrentNoteSpeed:F2}\n" +
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$"Stream: {_noteStream}\n" +
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$"BaseSpeed: {_baseSpeed}\n" +
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$"BaseBPM: {_baseBPM}\n" +
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$"InitializeOffset:{InitializeOffset}\n"+
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$"当前速度:{CurrentNoteSpeed}"
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;
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}
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}
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