ScenePartitionObject

- Loading
- Partial loading
- Saving

Editor/ScenePartition.cs

@@ -0,0 +1,70 @@
+using System.Collections.Generic;
+using System.IO;
+using System.Text.RegularExpressions;
+
+namespace VertexColor.ScenePartition.Editor
+{
+    public class SceneIdComparer : IComparer<ScenePartition>
+    {
+        public int Compare(ScenePartition x, ScenePartition y)
+        {
+            if (x.id == y.id)
+            {
+                return 0;
+            }
+            if (x.id < y.id)
+            {
+                return -1;
+            }
+
+            return 1;
+        }
+    }
+
+    [System.Serializable]
+    public class ScenePartition
+    {
+        public uint id = 0;
+        public string filePath = null;
+        public string[] data = null;
+        public HashSet<uint> references = new HashSet<uint>();
+
+        public ScenePartition(string filePath)
+        {
+            this.filePath = filePath;
+
+            data = File.ReadAllLines(filePath);
+
+            if (data == null || data.Length == 0) return;
+
+            {   // Get id.
+                string pattern = @"&(\d+)";
+
+                // Find all matches using regex
+                Match match = Regex.Match(data[0], pattern);
+
+                if (!match.Success) return;
+                if (!uint.TryParse(match.Groups[1].Value, out id)) return;
+            }
+
+            {   // Get references.
+                string pattern = @"fileID:\s(\d+)";
+
+                for (int i = 0; i < data.Length; i++)
+                {
+                    // Find the match using regex
+                    Match match = Regex.Match(data[i], pattern);
+
+                    if (!match.Success) continue;
+
+                    if (uint.TryParse(match.Groups[1].Value, out uint fileNumber))
+                    {
+                        if (fileNumber == 0) continue; // 0 == nothing.
+
+                        references.Add(fileNumber);
+                    }
+                }
+            }
+        }
+    }
+}

Editor/ScenePartition.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 002f02333c6d0b844bff6ab0266ad686
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Editor/ScenePartitionSO.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using UnityEditor;
 using UnityEditor.SceneManagement;
 using UnityEngine;
@@ -13,11 +12,13 @@ public class ScenePartitionSO : ScriptableObject
     {
         [field: SerializeField]
         public SceneAsset sceneAsset { get; private set; } = null;
-        public string sceneName { get; private set; } = "";
+        public string sceneName => sceneAsset == null ? name : sceneAsset.name;
 
-        public bool hasLoadedPartitions => (loadedPartitions != null && loadedPartitions.Count > 0);
-        [SerializeField]
-        private List<string> loadedPartitions = null; // Should not be serialized, this would be local data only.
+        public bool hasCreatedPartitions => scenePartitions != null && scenePartitions.Count > 0;
+        public SortedList<uint, ScenePartition> scenePartitions = null;
+
+        public bool hasLoadedPartitions => loadedScenePartitions != null && loadedScenePartitions.Count > 0;
+        public SortedList<uint, ScenePartition> loadedScenePartitions = null;
 
         public void CreateScene()
         {
@@ -29,34 +30,72 @@ public void CreateScene()
             EditorSceneManager.SaveScene(scene, scenePath);
 
             AssetDatabase.Refresh();
+
+            sceneAsset = AssetDatabase.LoadAssetAtPath<SceneAsset>(scenePath);
+
+            AssetDatabase.SaveAssets();
+            AssetDatabase.Refresh();
         }
 
+        /// <summary>
+        /// Load partitions from disk and construct the scene file.
+        /// </summary>
         public void LoadAll()
+        {
+            CreateScenePartitions();
+            SortedSet<uint> ids = new SortedSet<uint>(scenePartitions.Keys);
+            LoadScenePartitions(ids);
+        }
+
+        private void CreateScenePartitions()
         {
             string dataPath = ScenePartitionUtils.GetDataPath(this);
+            string[] files = Directory.GetFiles(dataPath);
+
+            scenePartitions = new SortedList<uint, ScenePartition>();
+
+            for (int i = 0; i < files.Length; i++)
+            {
+                ScenePartition scenePartition = new ScenePartition(files[i]);
+                scenePartitions.Add(scenePartition.id, scenePartition);
+            }
+        }
+
+        private void LoadScenePartitions(SortedSet<uint> partitionIds)
+        {
+            if (!hasCreatedPartitions) return;
+
             string scenePath = ScenePartitionUtils.GetScenePath(this);
 
             List<string> data = new List<string>();
-            List<string> files = Directory.GetFiles(dataPath).ToList();
-            files.Sort();
 
-            for (int i = 0; i < files.Count; i++)
+            loadedScenePartitions = new SortedList<uint, ScenePartition>();
+
+            // Add the header.
+            partitionIds.Add(0);
+
+            // Create scene data.
+            foreach (uint id in partitionIds)
             {
-                data.AddRange(File.ReadAllLines(files[i]));
+                ScenePartition p = scenePartitions[id];
+                data.AddRange(p.data);
+                loadedScenePartitions.Add(p.id, p);
             }
 
+            // Create scene.
             File.WriteAllLines(scenePath, data);
 
-            loadedPartitions.AddRange(files);
-
             AssetDatabase.Refresh();
         }
 
+        /// <summary>
+        /// Convert scene to partitions and save them to disk.
+        /// </summary>
         public void SaveAll()
         {
-            if (!hasLoadedPartitions) return;
+            if (!hasCreatedPartitions) return;
 
-            DeleteLoadedPartitions();
+            DeleteLoadedPartitions(); // Delete the loaded partitions from disk so we can write the new ones.
 
             string dataPath = ScenePartitionUtils.GetDataPath(this);
             string scenePath = ScenePartitionUtils.GetScenePath(this);
@@ -78,8 +117,13 @@ public void SaveAll()
             }
 
             File.WriteAllLines($"{dataPath}/{sceneName}.yaml", data[0..lastIndex]);
+
+            LoadAll(); // Reload.
         }
 
+        /// <summary>
+        /// Empty the scene and save it (so it has no changes in source control).
+        /// </summary>
         public void Unload()
         {
             string dataPath = ScenePartitionUtils.GetDataPath(this);
@@ -91,36 +135,45 @@ public void Unload()
 
             for (int i = gameObjects.Length - 1; i >= 0; i--)
             {
-                Object.DestroyImmediate(gameObjects[i]);
+                DestroyImmediate(gameObjects[i]);
             }
 
             EditorSceneManager.SaveScene(scene);
 
-            loadedPartitions.Clear();
+            scenePartitions.Clear();
 
             AssetDatabase.Refresh();
         }
 
         private void DeleteLoadedPartitions()
         {
-            if (loadedPartitions == null) return;
+            if (!hasCreatedPartitions) return;
 
-            for (int i = loadedPartitions.Count - 1; i >= 0; i--)
+            foreach (KeyValuePair<uint, ScenePartition> scenePartition in scenePartitions)
             {
-                if (!File.Exists(loadedPartitions[i])) continue;
+                if (!File.Exists(scenePartition.Value.filePath)) continue;
 
-                File.Delete(loadedPartitions[i]);
+                File.Delete(scenePartition.Value.filePath);
             }
 
-            loadedPartitions.Clear();
+            scenePartitions.Clear();
         }
 
-        private void OnValidate()
+        public void LoadPartitions(uint[] ids)
         {
-            if (string.IsNullOrWhiteSpace(sceneName) && sceneAsset != null)
+            SortedSet<uint> partitionIds = new SortedSet<uint>();
+
+            for (int i = 0; i < ids.Length; i++)
             {
-                sceneName = sceneAsset.name;
+                SortedSet<uint> connections = ScenePartitionUtils.FindDeeplyLinkedObjects(scenePartitions, ids[i]);
+
+                foreach (uint c in connections)
+                {
+                    partitionIds.Add(c);
+                }
             }
+
+            LoadScenePartitions(partitionIds);
         }
     }
 }

Editor/ScenePartitionSOEditor.cs

@@ -1,22 +1,26 @@
-using UnityEngine;
 using UnityEditor;
+using UnityEngine;
 
 namespace VertexColor.ScenePartition.Editor
 {
     [CustomEditor(typeof(ScenePartitionSO))]
     public class ScenePartitionSOEditor : UnityEditor.Editor
     {
+        private int id = 0;
+
         public override void OnInspectorGUI()
         {
             ScenePartitionSO scenePartitionSO = (target as ScenePartitionSO);
 
+            DrawDefaultInspector();
+
             serializedObject.Update();
             //EditorGUILayout.PropertyField(sceneAssetProperty);
             serializedObject.ApplyModifiedProperties();
 
             EditorGUILayout.Space();
 
-            if(scenePartitionSO.sceneAsset == null)
+            if (scenePartitionSO.sceneAsset == null)
             {
                 if (GUILayout.Button("Create Scene"))
                 {
@@ -30,7 +34,7 @@ public override void OnInspectorGUI()
                     scenePartitionSO.LoadAll();
                 }
 
-                if (scenePartitionSO.hasLoadedPartitions)
+                if (scenePartitionSO.hasCreatedPartitions)
                 {
                     if (GUILayout.Button("Save All"))
                     {
@@ -43,17 +47,60 @@ public override void OnInspectorGUI()
                     scenePartitionSO.Unload();
                 }
 
+                EditorGUILayout.Space();
+
                 if (GUILayout.Button("Open Scene Data Folder"))
                 {
                     EditorUtility.RevealInFinder(ScenePartitionUtils.GetDataPath(scenePartitionSO));
                 }
+
+                EditorGUILayout.Space();
+
+                id = EditorGUILayout.IntField("id", id);
+
+                if (GUILayout.Button("Test Load"))
+                {
+                    scenePartitionSO.LoadPartitions(new uint[1] { (uint)id });
+                }
             }
 
             EditorGUILayout.Space();
 
             using (new EditorGUI.DisabledGroupScope(true))
             {
-                DrawDefaultInspector();
+                if (scenePartitionSO.hasCreatedPartitions)
+                {
+                    EditorGUILayout.LabelField($"scenePartitions");
+
+                    foreach (System.Collections.Generic.KeyValuePair<uint, ScenePartition> scenePartition in scenePartitionSO.scenePartitions)
+                    {
+                        EditorGUILayout.IntField((int)scenePartition.Value.id);
+                        EditorGUI.indentLevel++;
+                        foreach (var reference in scenePartition.Value.references)
+                        {
+                            EditorGUILayout.IntField((int)reference);
+                        }
+                        EditorGUI.indentLevel--;
+                    }
+                }
+
+                EditorGUILayout.Space();
+
+                if (scenePartitionSO.hasLoadedPartitions)
+                {
+                    EditorGUILayout.LabelField($"loadedScenePartitions");
+
+                    foreach (System.Collections.Generic.KeyValuePair<uint, ScenePartition> scenePartition in scenePartitionSO.loadedScenePartitions)
+                    {
+                        EditorGUILayout.IntField((int)scenePartition.Value.id);
+                        EditorGUI.indentLevel++;
+                        foreach (var reference in scenePartition.Value.references)
+                        {
+                            EditorGUILayout.IntField((int)reference);
+                        }
+                        EditorGUI.indentLevel--;
+                    }
+                }
             }
         }
     }

Editor/ScenePartitionUtils.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.IO;
 using UnityEditor;
 using UnityEngine;
@@ -24,5 +25,32 @@ public static string GetScenePath(ScenePartitionSO scenePartitionSO)
 
             return scenePath;
         }
+
+        public static SortedSet<uint> FindDeeplyLinkedObjects(SortedList<uint, ScenePartition> scenePartitions, uint partitionId)
+        {
+            SortedSet<uint> linkedObjects = new SortedSet<uint>();
+            FindDeeplyLinkedObjectsRecursive(scenePartitions, partitionId, linkedObjects);
+            return linkedObjects;
+        }
+
+        private static void FindDeeplyLinkedObjectsRecursive(SortedList<uint, ScenePartition> scenePartitions, uint partitionId, SortedSet<uint> linkedObjects)
+        {
+            if (linkedObjects.Contains(partitionId)) return;
+            if (!scenePartitions.TryGetValue(partitionId, out ScenePartition partition)) return;
+
+            linkedObjects.Add(partitionId);
+
+            foreach (uint reference in partition.references)
+            {
+                FindDeeplyLinkedObjectsRecursive(scenePartitions, reference, linkedObjects);
+                if (scenePartitions.TryGetValue(reference, out ScenePartition referencedPartition))
+                {
+                    foreach (uint subReference in referencedPartition.references)
+                    {
+                        FindDeeplyLinkedObjectsRecursive(scenePartitions, subReference, linkedObjects);
+                    }
+                }
+            }
+        }
     }
 }