Tilt，Offset，以及谱面合并操作

Assets/Scripts/Manager/ProjectManager.cs

@@ -31,6 +31,7 @@ namespace Ichni
         public LoadManager loadManager;
         public ExportManager exportManager;
         public BeatmapClipManager beatmapClipManager;
+        public BeatmapMergeManager beatmapMergeManager;
         public NotePrefabManager notePrefabManager;
         public AutoSaveManager autoSaveManager;
 
@@ -40,6 +41,7 @@ namespace Ichni
             loadManager = new LoadManager();
             exportManager = new ExportManager();
             beatmapClipManager = new BeatmapClipManager();
+            beatmapMergeManager = new BeatmapMergeManager();
             notePrefabManager = new NotePrefabManager();
             autoSaveManager = new AutoSaveManager();
         }
@@ -296,6 +298,57 @@ namespace Ichni
         }
     }
 
+    public class BeatmapMergeManager
+    {
+        public void MergeBeatmap(string mergeName)
+        {
+            string mergePath = Application.streamingAssetsPath + "/Merges/" + mergeName + ".json";
+            BeatmapContainer_BM merge = ES3.Load<BeatmapContainer_BM>("Beatmap", mergePath, ProjectManager.SaveSettings);
+            
+            merge.elementList.ForEach(element =>
+            {
+                if (element == null)
+                {
+                    Debug.LogError("Null element detected in elementList. Skipping execution.");
+                    return;
+                }
+                
+                if (BeatmapContainer_BM.LowPriorityGameElementTypes.Contains(element.GetType()))
+                {
+                    return;
+                }
+                
+                if (element is GameElement_BM gameElement)
+                {
+                    GameElement_BM.identifier.Add(gameElement.elementGuid, gameElement);
+                }
+
+                if (element is GameCamera_BM || GameElement_BM.GetElementBM(element.attachedElementGuid) is GameCamera_BM)
+                {
+                    return;
+                }
+
+                element.ExecuteBM();
+            });
+
+            merge.elementList.ForEach(element =>
+            {
+                if (element == null)
+                {
+                    Debug.LogError("Null element detected in elementList during low-priority execution. Skipping execution.");
+                    return;
+                }
+
+                if (BeatmapContainer_BM.LowPriorityGameElementTypes.Contains(element.GetType()))
+                {
+                    element.ExecuteBM();
+                }
+            });
+
+            EditorManager.instance.beatmapContainer.ExecuteLowPriorityActions();
+        }
+    }
+
     public class NotePrefabManager
     {
         private string notePrefabPath => Application.streamingAssetsPath + "/NotePrefabs";