XOR cast

Author: mfe

com.unity.formats.alembic/Runtime/Scripts/Importer/AbcAPI.cs

@@ -325,7 +325,14 @@ struct aiContext
 #if UNITY_6000_4_OR_NEWER
         public static aiContext Create(EntityId uid)
         {
-            return NativeMethods.aiContextCreate((int)EntityId.ToULong(uid));
+            ulong u = EntityId.ToULong(uid);
+            unchecked
+            {
+                int key = (int)(u ^ (u >> 32));
+                if (key == 0 && u != 0)
+                    key = (int)(u | 1);
+                return NativeMethods.aiContextCreate(key);
+            }
         }
 #endif