fix: 一些小问题

Author: Starrah

generator/chu/C2sGenerator.cs

@@ -104,13 +104,13 @@ private List<string> FormatNote(ChuNote n, List<Alert> alerts)
             };
             List<string> r = [name, m.ToString(), o.ToString(), n.Cell.ToString(), n.Width.ToString()];
 
-            if (n.Type == ChuNoteType.Tap && n.IsEx) r.Add(ExDirections_ToUgc[n.Ex!.Value]); // CHR
+            if (n.Type == ChuNoteType.Tap && n.IsEx) r.Add(n.Ex.ToString()!); // CHR
             else if (n.Type == ChuNoteType.Flick) r.Add(n.Ex == ExDirection.RS ? "R" : "L"); // FLK
             else if (n.IsAir)
             { // AIR
                 var targetStr = AsC2sPreviousStr(n.TargetNote);
                 Utils.Assert(targetStr != null, "MuConvert内部错误：Air音符的TargetNote出现了不合法的类型！");
-                r.AddRange(targetStr!, AirColor_ToUgc(n));
+                r.AddRange(targetStr!, n.Color.ToString());
             }
 
             results.Add(r);
@@ -130,16 +130,19 @@ private List<string> FormatNote(ChuNote n, List<Alert> alerts)
             };
 
             var start = (n.Time, n.Cell, n.Width, n.Height);
-            foreach (var seg in n.Segments)
+            for (int idx = 0; idx < n.Segments.Count; idx++)
             {
+                var seg = n.Segments[idx];
                 // 必备的：name bar tick cell width
                 var (sB, sT) = Utils.BarAndTick(start.Time, RSL);
-                List<string> r = [name, sB.ToString(), sT.ToString(), start.Cell.ToString(), start.Width.ToString()];
+                var hereName = n.Type == ChuNoteType.Slide && seg.C ? name[..2] + "C" : name;
+                List<string> r = [hereName, sB.ToString(), sT.ToString(), start.Cell.ToString(), start.Width.ToString()];
 
                 // 前驱targetNote 或 crushInterval
                 if (NeedsTargetNote(n))
                 {
-                    var targetStr = AsC2sPreviousStr(n.TargetNote);
+                    // 对第一段，targetStr是TargetNote；对后面的段，TargetNote应该是前一段的名字。
+                    var targetStr = idx == 0 ? AsC2sPreviousStr(n.TargetNote) : AsC2sPreviousStr(n, n.Segments[idx-1]);
                     Utils.Assert(targetStr != null, "MuConvert内部错误：Air音符的TargetNote出现了不合法的类型！");
                     r.Add(targetStr!);
                 }
@@ -166,10 +169,10 @@ private List<string> FormatNote(ChuNote n, List<Alert> alerts)
 
                 // 颜色
                 if (n.IsAir) r.Add(n.Color.ToString());
-                else if (n.Type == ChuNoteType.Slide) r.Add("SLD"); // C2S 1.13版本以上，Slide在最后，还需要加一个”SLD“后缀
+                else if (n.Type == ChuNoteType.Slide) r.Add("SLD"); // C2S 1.10版本以上，Slide在最后，还需要加一个”SLD“后缀
 
                 // Ex音符的话，要加上Ex方向
-                if (n.IsEx) r.Add(ExDirections_ToUgc[n.Ex!.Value]);
+                if (n.IsEx) r.Add(n.Ex.ToString()!);
 
                 results.Add(r);
                 start = (endTime, seg.EndCell, seg.EndWidth, seg.EndHeight);

generator/chu/UgcGenerator.cs

@@ -45,7 +45,7 @@ private List<ChuNote> SortedNotesForConnectingPrevious(ChuChart chart)
         // 2. 遍历 chart.Notes，对每个 ChuNote 以 DFS 方式把它本身以及它所有 Next 子孙依次加入结果。
         var result = new List<ChuNote>(chart.Notes.Count);
         var visited = new HashSet<ChuNote>();
-        foreach (var root in chart.Notes) Dfs(root);
+        foreach (var root in chart.Notes.Where(x=>x.TargetNote == null)) Dfs(root);
         return result;
 
         void Dfs(ChuNote n)

parser/chu/UgcParser.cs

@@ -607,6 +607,7 @@ private void ParseCellWidth(string code, int startIdx, ChuNote note, List<Alert>
     private (int, ChuNote?) ParseAirCrushNote(string[] lines, int idx, string code, ChuNote note, List<Alert> alerts, ChuChart chart)
     {
         note.Type = ChuNoteType.Crush;
+        note.IsAir = true;
         ParseCellWidth(code, 1, note, alerts, idx + 1, chart);
         if (code.Length <= 3) alerts.Add(new Alert(Warning, "AirCrush缺少参数！", (chart, note.Time), idx+1, lines[idx]));
         else ParseHeightAndColor(note, code[3..], alerts, idx+1, "C");

utils/ChuUtils.cs

@@ -84,14 +84,14 @@ public static bool AirColor_FromUgc(ChuNote n, string rawColorStr, out NoteColor
     public static bool TryH36ToI(string str, out int result) => Utils.TryHToI(str, 36, out result);
     public static string IToH36(int value) => Utils.IToH(value, 36);
 
-    public static string? AsC2sPreviousStr(ChuNote? n) => n?.Type switch
+    public static string? AsC2sPreviousStr(ChuNote? n, ChuSegment? lastSegment = null) => n?.Type switch
     {
         ChuNoteType.Tap when !n.IsAir => n.IsEx ? "CHR" : "TAP",
         ChuNoteType.Flick => "FLK",
         ChuNoteType.Mine => "MNE",
         ChuNoteType.Hold => n.IsAir ? "AHD" : "HLD",
         ChuNoteType.Slide => n.IsAir ? 
-            (n.Segments.LastOrDefault()?.C == true ? "ASC" : "ASD") : 
+            (lastSegment ?? n.Segments.LastOrDefault())?.C == true ? "ASC" : "ASD" : 
             "SLD",
         _ => null,
     };