ulong and grid list wrapper test

- wrapped lists in serialized dicts do work, maybe wrap anything.
- note: maybe convert long fields to string fields to support ulong?

Runtime/SceneGrid.cs

@@ -1,4 +1,3 @@
-using System.Collections.Generic;
 using UnityEngine;
 
 namespace VertexColor.ScenePartition
@@ -14,16 +13,18 @@ namespace VertexColor.ScenePartition
 
         public SceneGridDictionary Grid => grid;
 
-        public void Insert(long scenePartitionId, Vector3 point)
+        public void Insert(ulong scenePartitionId, Vector3 point)
         {
             int gridId = CalculateGridPosition(point, cellSize);
-            if (grid.TryGetValue(gridId, out List<long> ids))
+            if (grid.TryGetValue(gridId, out GridList ids))
             {
-                ids.Add(scenePartitionId);
+                ids.list.Add(scenePartitionId);
             }
             else
             {
-                grid.Add(gridId, new List<long> { scenePartitionId });
+                var l = new GridList();
+                l.list.Add(scenePartitionId);
+                grid.Add(gridId, l);
             }
         }
 
@@ -64,5 +65,20 @@ namespace VertexColor.ScenePartition
 
             return (x, y);
         }
+
+        public static ulong ULongPairToULong(ulong x, ulong y)
+        {
+            // Combine x and y components into a single ulong
+            return (x << 32) | (uint)y;
+        }
+
+        public static (ulong, ulong) ULongToULongPair(ulong value)
+        {
+            // Extract x and y components from the combined ulong
+            ulong x = value >> 32;
+            ulong y = (uint)value;
+
+            return (x, y);
+        }
     }
 }

Runtime/ScenePartition.cs

@@ -24,9 +24,9 @@ namespace VertexColor.ScenePartition
     [System.Serializable]
     public class ScenePartition
     {
-        public long id = 0;
-        //public long classId = 0;
-        public string filePath = null;
+        public ulong id = 0;
+        //public ulong classId = 0;
+        public string filePath = null; // TODO: Only store relative path.
         //public string[] data = null;
         public LongSortedSet references = new LongSortedSet();
 
@@ -45,7 +45,7 @@ namespace VertexColor.ScenePartition
                 Match match = Regex.Match(data[0], pattern);
 
                 if (!match.Success) return;
-                if (!long.TryParse(match.Groups[1].Value, out id)) return;
+                if (!ulong.TryParse(match.Groups[1].Value, out id)) return;
             }
 
             //{   // Get class id.
@@ -68,7 +68,7 @@ namespace VertexColor.ScenePartition
 
                     if (!match.Success) continue;
 
-                    if (long.TryParse(match.Groups[1].Value, out long fileNumber))
+                    if (ulong.TryParse(match.Groups[1].Value, out ulong fileNumber))
                     {
                         if (fileNumber == 0) continue; // 0 == nothing.
 

Runtime/SerializedStructures.cs

@@ -3,11 +3,17 @@ using System.Collections.Generic;
 namespace VertexColor.ScenePartition
 {
     [System.Serializable]
-    public class ScenePartitionSortedList : SerializableSortedList<long, ScenePartition> { }
+    public class ScenePartitionSortedList : SerializableSortedList<ulong, ScenePartition> { }
 
     [System.Serializable]
-    public class LongSortedSet : SerializableSortedSet<long> { }
+    public class LongSortedSet : SerializableSortedSet<ulong> { }
 
     [System.Serializable]
-    public class SceneGridDictionary : SerializableDictionary<int, List<long>> { }
+    public class SceneGridDictionary : SerializableDictionary<int, GridList> { }
+
+    [System.Serializable]
+    public class GridList
+    {
+        public List<ulong> list = new List<ulong>();
+    }
 }