修复头尾抖，auto orient完全胜利

Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/Scripts/EditorGame/GameElements/Track/PathNode.cs

@@ -29,7 +29,7 @@ namespace Ichni.RhythmGame
         public bool isShowingSphere;
 
         public static PathNode GenerateElement(string elementName, Guid id, List<string> tags, bool isFirstGenerated,
-            Track track, bool isShowingSphere)
+            Track track, bool isShowingSphere, int index = -1)
         {
             PathNode pathNode = Instantiate(EditorManager.instance.basePrefabs.pathNode, track.transform)
                 .GetComponent<PathNode>();
@@ -39,7 +39,15 @@ namespace Ichni.RhythmGame
             pathNode.track = track;
             pathNode.isShowingSphere = isShowingSphere;
             pathNode.SetPathNodeSphere(isShowingSphere);
-            track.trackPathSubmodule.pathNodeList.Add(pathNode);
+            if (index < 0)
+            {
+                track.trackPathSubmodule.pathNodeList.Add(pathNode);
+            }
+            else
+            {
+                track.trackPathSubmodule.pathNodeList.Insert(index, pathNode);
+            }
+
 
             return pathNode;
         }