From 8c612aa94994f13f8f5511c58966fc62f30cf846 Mon Sep 17 00:00:00 2001
From: Mikhail <99481254+DCFApixels@users.noreply.github.com>
Date: Thu, 1 Jun 2023 20:14:34 +0800
Subject: [PATCH] update EcsGroup

---
 src/EcsGroup.cs | 30 ++++++++++++++++++++++++------
 src/EcsWorld.cs |  4 ++--
 2 files changed, 26 insertions(+), 8 deletions(-)

diff --git a/src/EcsGroup.cs b/src/EcsGroup.cs
index 1a05b0c..8a02fcd 100644
--- a/src/EcsGroup.cs
+++ b/src/EcsGroup.cs
@@ -161,7 +161,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static EcsGroup New(EcsWorld world)
         {
-            return world.GetGroupFromPool();
+            return world.GetFreeGroup();
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal EcsGroup(EcsWorld world, int denseCapacity = 64)
@@ -259,7 +259,7 @@ namespace DCFApixels.DragonECS
         }
         public EcsGroup Clone()
         {
-            EcsGroup result = _source.GetGroupFromPool();
+            EcsGroup result = _source.GetFreeGroup();
             result.CopyFrom(this);
             return result;
         }
@@ -350,6 +350,14 @@ namespace DCFApixels.DragonECS
                 else
                     AddInternal(item);
         }
+        public void Inverse()
+        {
+            foreach (var item in _source.Entities)
+                if (Has(item))
+                    RemoveInternal(item);
+                else
+                    AddInternal(item);
+        }
         #endregion
 
         #region Static Set operations
@@ -360,7 +368,7 @@ namespace DCFApixels.DragonECS
 #if (DEBUG && !DISABLE_DEBUG) || !DISABLE_DRAGONECS_ASSERT_CHEKS
             if (a._source != b._source) ThrowArgumentDifferentWorldsException();
 #endif
-            EcsGroup result = a._source.GetGroupFromPool();
+            EcsGroup result = a._source.GetFreeGroup();
             foreach (var item in a)
                 result.AddInternal(item);
             foreach (var item in b)
@@ -374,7 +382,7 @@ namespace DCFApixels.DragonECS
 #if (DEBUG && !DISABLE_DEBUG) || !DISABLE_DRAGONECS_ASSERT_CHEKS
             if (a._source != b._source) ThrowArgumentDifferentWorldsException();
 #endif
-            EcsGroup result = a._source.GetGroupFromPool();
+            EcsGroup result = a._source.GetFreeGroup();
             foreach (var item in a)
                 if (!b.Has(item))
                     result.AddInternal(item);
@@ -387,7 +395,7 @@ namespace DCFApixels.DragonECS
 #if (DEBUG && !DISABLE_DEBUG) || !DISABLE_DRAGONECS_ASSERT_CHEKS
             if (a._source != b._source) ThrowArgumentDifferentWorldsException();
 #endif
-            EcsGroup result = a._source.GetGroupFromPool();
+            EcsGroup result = a._source.GetFreeGroup();
             foreach (var item in a)
                 if (b.Has(item))
                     result.AddInternal(item);
@@ -401,7 +409,7 @@ namespace DCFApixels.DragonECS
 #if (DEBUG && !DISABLE_DEBUG) || !DISABLE_DRAGONECS_ASSERT_CHEKS
             if (a._source != b._source) ThrowArgumentDifferentWorldsException();
 #endif
-            EcsGroup result = a._source.GetGroupFromPool();
+            EcsGroup result = a._source.GetFreeGroup();
             foreach (var item in a)
                 if (!b.Has(item))
                     result.AddInternal(item);
@@ -410,6 +418,15 @@ namespace DCFApixels.DragonECS
                     result.AddInternal(item);
             return result;
         }
+
+        public static EcsGroup Inverse(EcsGroup a)
+        {
+            EcsGroup result = a._source.GetFreeGroup();
+            foreach (var item in a._source.Entities)
+                if (!a.Has(item))
+                    result.AddInternal(item);
+            return result;
+        }
         #endregion
 
         #region Enumerator
@@ -545,6 +562,7 @@ namespace DCFApixels.DragonECS
             public int CapacityDense => _group.CapacityDense;
             public int CapacitySparce => _group.CapacitySparce;
 
+            public override string ToString() => _group.ToString();
             public DebuggerProxy(EcsGroup group) => _group = group;
         }
         #endregion
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index ef9ec9d..20433dd 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -83,7 +83,7 @@ namespace DCFApixels.DragonECS
             _delEntBuffer = new int[_entitesCapacity >> DEL_ENT_BUFFER_SIZE_OFFSET];
 
             _groups = new List<WeakReference<EcsGroup>>();
-            _allEntites = GetGroupFromPool();
+            _allEntites = GetFreeGroup();
 
             _subjects = new EcsSubject[128];
             _executors = new EcsQueryExecutor[128];
@@ -337,7 +337,7 @@ namespace DCFApixels.DragonECS
         {
             _groups.Add(new WeakReference<EcsGroup>(group));
         }
-        internal EcsGroup GetGroupFromPool()
+        internal EcsGroup GetFreeGroup()
         {
             EcsGroup result = _groupsPool.Count <= 0 ? new EcsGroup(this) : _groupsPool.Pop();
             result._isReleased = false;