Update

src/Attributes.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: 269d1f5d46517e14a8563d7f239fa559
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/Attributes/DebugColorAttribute.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace DCFApixels.DragonECS
+{
+    [AttributeUsage(AttributeTargets.Struct | AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
+    public sealed class DebugColorAttribute : Attribute
+    {
+        private ColorRecord color;
+        public byte r => color.r;
+        public byte g => color.g;
+        public byte b => color.b;
+
+        public DebugColorAttribute(byte r, byte g, byte b)
+        {
+            color = new ColorRecord(r, g, b);
+        }
+
+        public DebugColorAttribute(DebugColor color)
+        {
+            this.color = new ColorRecord((int)color);
+        }
+
+
+        [StructLayout(LayoutKind.Explicit, Pack = 1, Size = 4)]
+        private readonly struct ColorRecord
+        {
+            [FieldOffset(0)]
+            public readonly int full;
+            [FieldOffset(3)]
+            public readonly byte r;
+            [FieldOffset(2)]
+            public readonly byte g;
+            [FieldOffset(1)]
+            public readonly byte b;
+
+            public ColorRecord(byte r, byte g, byte b) : this()
+            {
+                this.r = r;
+                this.g = g;
+                this.b = b;
+            }
+            public ColorRecord(int full) : this()
+            {
+                this.full = full;
+            }
+        }
+    }
+
+    public enum DebugColor
+    {
+        /// <summary> Red. RGB is (255, 0, 0)</summary>
+        Red = 255 << 8 * 3 + 000 << 8 * 2 + 000 << 8,
+        /// <summary> Green. RGB is (0, 255, 0)</summary>
+        Green = 000 << 8 * 3 + 255 << 8 * 2 + 000 << 8,
+        /// <summary> Blue. RGB is (0, 0, 255)</summary>
+        Blue = 000 << 8 * 3 + 000 << 8 * 2 + 255 << 8,
+
+        /// <summary> Yellow. RGB is (255, 255, 0)</summary>
+        Yellow = 255 << 8 * 3 + 255 << 8 * 2 + 000 << 8,
+        /// <summary> Cyan. RGB is (0, 255, 255)</summary>
+        Cyan = 000 << 8 * 3 + 255 << 8 * 2 + 255 << 8,
+        /// <summary> Magenta. RGB is (255, 0, 255)</summary>
+        Magenta = 255 << 8 * 3 + 000 << 8 * 2 + 000 << 8,
+
+        /// <summary> Yellow. RGB is (255, 127, 0)</summary>
+        Orange = (255 << 24) + (127 << 16) + (000 << 8),
+
+        /// <summary> Grey/Gray. RGB is (127, 127, 127)</summary>
+        Gray = 127 << 8 * 3 + 127 << 8 * 2 + 127 << 8,
+        /// <summary> Grey/Gray. RGB is (127, 127, 127)</summary>
+        Grey = Gray,
+        /// <summary> White. RGB is (255, 255, 255)</summary>
+        White = -1,
+        /// <summary> Black. RGB is (0, 0, 0)</summary>
+        Black = 0,
+    }
+}

src/Attributes/DebugColorAttribute.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 2ae31658c78bbf04cb755ac72be367dd
+guid: 4b96ad0ff9cf7124d8539afccec8f1ae
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

src/Builtin/DefaultRunners.cs

@@ -2,53 +2,49 @@
 {
     public interface IEcsPreInitSystem : IEcsSystem
     {
-        public void PreInit(EcsSession session);
+        public void PreInit(EcsSystems systems);
     }
     public interface IEcsInitSystem : IEcsSystem
     {
-        public void Init(EcsSession session);
+        public void Init(EcsSystems systems);
     }
     public interface IEcsRunSystem : IEcsSystem
     {
-        public void Run(EcsSession session);
+        public void Run(EcsSystems systems);
     }
     public interface IEcsDestroySystem : IEcsSystem
     {
-        public void Destroy(EcsSession session);
+        public void Destroy(EcsSystems systems);
     }
 
-    public interface IEcsBaseSystem :
-        IEcsInitSystem,
-        IEcsRunSystem,
-        IEcsDestroySystem
-    { }
+    public interface IEcsBaseSystem : IEcsInitSystem, IEcsRunSystem, IEcsDestroySystem { }
 
     public sealed class EcsPreInitRunner : EcsRunner<IEcsPreInitSystem>, IEcsPreInitSystem
     {
-        void IEcsPreInitSystem.PreInit(EcsSession session)
+        void IEcsPreInitSystem.PreInit(EcsSystems systems)
         {
-            foreach (var item in targets) item.PreInit(session);
+            foreach (var item in targets) item.PreInit(systems);
         }
     }
     public sealed class EcsInitRunner : EcsRunner<IEcsInitSystem>, IEcsInitSystem
     {
-        void IEcsInitSystem.Init(EcsSession session)
+        void IEcsInitSystem.Init(EcsSystems systems)
         {
-            foreach (var item in targets) item.Init(session);
+            foreach (var item in targets) item.Init(systems);
         }
     }
     public sealed class EcsRunRunner : EcsRunner<IEcsRunSystem>, IEcsRunSystem
     {
-        void IEcsRunSystem.Run(EcsSession session)
+        void IEcsRunSystem.Run(EcsSystems systems)
         {
-            foreach (var item in targets) item.Run(session);
+            foreach (var item in targets) item.Run(systems);
         }
     }
     public sealed class EcsDestroyRunner : EcsRunner<IEcsDestroySystem>, IEcsDestroySystem
     {
-        void IEcsDestroySystem.Destroy(EcsSession session)
+        void IEcsDestroySystem.Destroy(EcsSystems systems)
         {
-            foreach (var item in targets) item.Destroy(session);
+            foreach (var item in targets) item.Destroy(systems);
         }
     }
 }

src/Builtin/InjectSystem.cs

@@ -4,6 +4,7 @@
     {
         public void Inject(T obj);
     }
+    [DebugColor(DebugColor.Gray)]
     public sealed class InjectRunner<T> : EcsRunner<IEcsInject<T>>, IEcsInject<T>
     {
         void IEcsInject<T>.Inject(T obj)
@@ -15,6 +16,7 @@
         }
     }
 
+    [DebugColor(DebugColor.Gray)]
     public class InjectSystem<T> : IEcsPreInitSystem
     {
         private T _injectedData;
@@ -24,37 +26,38 @@
             _injectedData = injectedData;
         }
 
-        public void PreInit(EcsSession session)
+        public void PreInit(EcsSystems systems)
         {
-            var injector = session.GetRunner<IEcsInject<T>>();
+            var injector = systems.GetRunner<IEcsInject<T>>();
             injector.Inject(_injectedData);
         }
     }
 
     public static class InjectSystemExstensions
     {
-        public static EcsSession Inject<T>(this EcsSession self, T data)
+        public static EcsSystems.Builder Inject<T>(this EcsSystems.Builder self, T data)
         {
             self.Add(new InjectSystem<T>(data));
             return self;
         }
-
-        public static EcsSession Inject<A, B>(this EcsSession self, A dataA, B dataB)
+        public static EcsSystems.Builder Inject<A, B>(this EcsSystems.Builder self, A a, B b)
         {
-            self.Inject(dataA).Inject(dataB);
+            self.Inject(a).Inject(b);
             return self;
         }
-
-        public static EcsSession Inject<A, B, C, D>(this EcsSession self, A dataA, B dataB, C dataC, D dataD)
+        public static EcsSystems.Builder Inject<A, B, C, D>(this EcsSystems.Builder self, A a, B b, C c, D d)
         {
-            self.Inject(dataA).Inject(dataB).Inject(dataC).Inject(dataD);
+            self.Inject(a).Inject(b).Inject(c).Inject(d);
             return self;
         }
-
-        public static EcsSession Inject<A, B, C, D, E>(this EcsSession self,
-            A dataA, B dataB, C dataC, D dataD, E dataE)
+        public static EcsSystems.Builder Inject<A, B, C, D, E>(this EcsSystems.Builder self, A a, B b, C c, D d, E e)
         {
-            self.Inject(dataA).Inject(dataB).Inject(dataC).Inject(dataD).Inject(dataE);
+            self.Inject(a).Inject(b).Inject(c).Inject(d).Inject(e);
+            return self;
+        }
+        public static EcsSystems.Builder Inject<A, B, C, D, E, F>(this EcsSystems.Builder self, A a, B b, C c, D d, E e, F f)
+        {
+            self.Inject(a).Inject(b).Inject(c).Inject(d).Inject(e).Inject(f);
             return self;
         }
     }

src/Consts.cs

@@ -0,0 +1,8 @@
+namespace DCFApixels.DragonECS
+{
+    public class EcsConsts
+    {
+        public const string EXCEPTION_MESSAGE_PREFIX = "[DragonECS] ";
+        public const string DEBUG_PREFIX = "[DEBUG] ";
+    }
+}

src/Consts.cs.meta

@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: f04087406e09f6042a341cf8fc41fabf
+guid: 3c30dd6d8ecfdbd4aaceccd22bfb85c4
 MonoImporter:
   externalObjects: {}
   serializedVersion: 2

src/EcsFilter.cs

@@ -13,31 +13,193 @@ namespace DCFApixels.DragonECS
 
     #region Incs
     public interface IInc : IMaskCondition { }
-
     public struct Inc : IInc
     {
         public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype => Array.Empty<int>();
     }
     public struct Inc<T0> : IInc
     {
-        public int[] GetComponentsIDs<TWorldArchetype>()
-            where TWorldArchetype : IWorldArchetype
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
         {
             return new int[]
             {
-                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
             };
         }
     }
     public struct Inc<T0, T1> : IInc
     {
-        public int[] GetComponentsIDs<TWorldArchetype>()
-            where TWorldArchetype : IWorldArchetype
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
         {
             return new int[]
             {
                 EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
-                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6, T7> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T7>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6, T7, T8> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T7>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T8>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T7>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T8>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T9>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T7>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T8>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T9>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T10>.uniqueID,
+            };
+        }
+    }
+    public struct Inc<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> : IInc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T6>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T7>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T8>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T9>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T10>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T11>.uniqueID,
             };
         }
     }
@@ -45,15 +207,13 @@ namespace DCFApixels.DragonECS
 
     #region Excs
     public interface IExc : IMaskCondition { }
-
     public struct Exc : IExc
     {
         public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype => Array.Empty<int>();
     }
     public struct Exc<T0> : IExc
     {
-        public int[] GetComponentsIDs<TWorldArchetype>()
-            where TWorldArchetype : IWorldArchetype
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
         {
             return new int[]
             {
@@ -63,13 +223,66 @@ namespace DCFApixels.DragonECS
     }
     public struct Exc<T0, T1> : IExc
     {
-        public int[] GetComponentsIDs<TWorldArchetype>()
-            where TWorldArchetype : IWorldArchetype
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
         {
             return new int[]
             {
                 EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
-                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+            };
+        }
+    }
+    public struct Exc<T0, T1, T2> : IExc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+            };
+        }
+    }
+    public struct Exc<T0, T1, T2, T3> : IExc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+            };
+        }
+    }
+    public struct Exc<T0, T1, T2, T3, T4> : IExc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+            };
+        }
+    }
+    public struct Exc<T0, T1, T2, T3, T4, T5> : IExc
+    {
+        public int[] GetComponentsIDs<TWorldArchetype>() where TWorldArchetype : IWorldArchetype
+        {
+            return new int[]
+            {
+                EcsWorld<TWorldArchetype>.ComponentType<T0>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T1>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T2>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T3>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T4>.uniqueID,
+                EcsWorld<TWorldArchetype>.ComponentType<T5>.uniqueID,
             };
         }
     }
@@ -238,19 +451,4 @@ namespace DCFApixels.DragonECS
         #endregion
     }
     #endregion
-
-    #region Utils
-    internal static class ArrayExt
-    {
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal static T[] Sort<T>(this T[] self)
-        {
-            Array.Sort(self);
-
-            return self;
-        }
-
-
-    }
-    #endregion
 }

src/EcsGroup.cs

@@ -31,7 +31,7 @@ namespace DCFApixels.DragonECS
         #endregion
 
         #region Constrcutors
-        public EcsGroup(IEcsWorld world,  int entitiesCapacity, int delayedOpsCapacity = 128)
+        public EcsGroup(IEcsWorld world,  int entitiesCapacity, int delayedOpsCapacity = 32)
         {
             _source = world;
             _entities = new SparseSet(entitiesCapacity, entitiesCapacity);
@@ -67,6 +67,11 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
+        #region Contains
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool Contains(int entityID) => _entities.Contains(entityID);
+        #endregion
+
         #region AddGroup/RemoveGroup
         public void AddGroup(IEcsReadonlyGroup group)
         {
@@ -124,44 +129,28 @@ namespace DCFApixels.DragonECS
             private readonly EcsGroup _source;
             private readonly SparseSet _entities;
             private int _index;
-            private Entity _currentEntity;
 
             public Enumerator(EcsGroup group)
             {
                 _source = group;
                 _entities = group._entities;
                 _index = -1;
-                _currentEntity = new Entity(group.World, -1);
             }
 
-            public Entity Current
+            public ent Current
             {
                 [MethodImpl(MethodImplOptions.AggressiveInlining)]
-                get
-                {
-                    _currentEntity.id = _entities[_index];
-                    return _currentEntity;
-                }
+                get { return _source.World.GetEntity(_entities[_index]); }
             }
 
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            public bool MoveNext()
-            {
-                return ++_index < _entities.Count;
-            }
+            public bool MoveNext() => ++_index < _entities.Count;
 
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            public void Dispose()
-            {
-                _source.Unlock();
-            }
+            public void Dispose() => _source.Unlock();
 
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            public void Reset()
-            {
-                _index = -1;
-                _currentEntity.id = -1;
-            }
+            public void Reset() => _index = -1;
         }
 
         private struct DelayedOp

src/EcsPool.cs

@@ -1,7 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
-using UnityEngine;
 using System;
 using System.Reflection;
 using System.Linq;

src/EcsRunner.cs

@@ -1,5 +1,8 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq.Expressions;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.CompilerServices;
@@ -25,7 +28,12 @@ namespace DCFApixels.DragonECS
     }
 
     public interface IEcsSystem { }
-    public interface IEcsRunner { }
+    public interface IEcsRunner
+    {
+        public IList Targets { get; }
+        public object Filter { get; }
+        public bool IsHasFilter { get; }
+    }
 
 
     public static class IEcsProcessorExtensions
@@ -36,10 +44,9 @@ namespace DCFApixels.DragonECS
         }
     }
 
-
     internal static class EcsRunnerActivator
     {
-        private static Dictionary<Guid, Type> _runnerTypes; //interface guid/ Runner type pairs;
+        private static Dictionary<Guid, Type> _runnerHandlerTypes; //interface guid/Runner handler type pairs;
 
         static EcsRunnerActivator()
         {
@@ -47,28 +54,28 @@ namespace DCFApixels.DragonECS
 
             Type runnerBaseType = typeof(EcsRunner<>);
 
-            List<Type> newRunnerTypes = new List<Type>();
-            newRunnerTypes = Assembly.GetAssembly(runnerBaseType)
+            List<Type> runnerHandlerTypes = new List<Type>();
+            runnerHandlerTypes = Assembly.GetAssembly(runnerBaseType)
                 .GetTypes()
                 .Where(type => type.BaseType != null && type.BaseType.IsGenericType && runnerBaseType == type.BaseType.GetGenericTypeDefinition())
                 .ToList();
 
-#if DEBUG
-            for (int i = 0; i < newRunnerTypes.Count; i++)
+#if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
+            for (int i = 0; i < runnerHandlerTypes.Count; i++)
             {
-                var e = CheckRunnerValide(newRunnerTypes[i]);
+                var e = CheckRunnerValide(runnerHandlerTypes[i]);
                 if (e != null)
                 {
-                    newRunnerTypes.RemoveAt(i--);
+                    runnerHandlerTypes.RemoveAt(i--);
                     exceptions.Add(e);
                 }
             }
 #endif
-            _runnerTypes = new Dictionary<Guid, Type>();
-            foreach (var item in newRunnerTypes)
+            _runnerHandlerTypes = new Dictionary<Guid, Type>();
+            foreach (var item in runnerHandlerTypes)
             {
-                Type intrf = item.GetInterfaces().Where(o => o != typeof(IEcsRunner) && o != typeof(IEcsSystem)).First(); //TODO оптимизировать это место
-                _runnerTypes.Add(intrf.GUID, item);
+                Type interfaceType = item.GetInterfaces().Where(o => o != typeof(IEcsRunner) && o != typeof(IEcsSystem)).First(); //TODO оптимизировать это место
+                _runnerHandlerTypes.Add(interfaceType.GUID, item);
             }
 
             if (exceptions.Count > 0)
@@ -102,7 +109,7 @@ namespace DCFApixels.DragonECS
             }
             Guid interfaceGuid = nonGenericInterfaceType.GUID;
 
-            if (!_runnerTypes.TryGetValue(interfaceGuid, out Type runnerType))
+            if (!_runnerHandlerTypes.TryGetValue(interfaceGuid, out Type runnerType))
             {
                 throw new Exception();
             }
@@ -111,16 +118,17 @@ namespace DCFApixels.DragonECS
                 Type[] genericTypes = interfaceType.GetGenericArguments();
                 runnerType = runnerType.MakeGenericType(genericTypes);
             }
-            EcsRunner<TInterface>.Init(runnerType);
+            EcsRunner<TInterface>.Register(runnerType);
         }
     }
 
     public abstract class EcsRunner<TInterface> : IEcsSystem, IEcsRunner
         where TInterface : IEcsSystem
     {
-        internal static void Init(Type subclass)
+        #region Register
+        private static Type _subclass;
+        internal static void Register(Type subclass)
         {
-
 #if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
             if (_subclass != null)
             {
@@ -141,8 +149,14 @@ namespace DCFApixels.DragonECS
 #endif
             _subclass = subclass;
         }
+        #endregion
 
-        public static TInterface Instantiate(IEnumerable<IEcsSystem> targets, object filter)
+        #region FilterSystems
+        private static TInterface[] FilterSystems(IEnumerable<IEcsSystem> targets)
+        {
+            return targets.Where(o => o is TInterface).Select(o => (TInterface)o).ToArray();
+        }
+        private static TInterface[] FilterSystems(IEnumerable<IEcsSystem> targets, object filter)
         {
             Type interfaceType = typeof(TInterface);
 
@@ -166,32 +180,52 @@ namespace DCFApixels.DragonECS
                     return atr == null || atr.interfaceType == interfaceType && atr.filter == null;
                 });
             }
+            return newTargets.Select(o => (TInterface)o).ToArray();
+        }
+        #endregion
 
-            return Instantiate(newTargets.Select(o => (TInterface)o).ToArray());
-        }
-        public static TInterface Instantiate(IEnumerable<IEcsSystem> targets)
-        {
-            return Instantiate(targets.Where(o => o is TInterface).Select(o => (TInterface)o).ToArray());
-        }
-        internal static TInterface Instantiate(TInterface[] targets)
+        #region Instantiate
+        private static TInterface Instantiate(TInterface[] targets, bool isHasFilter, object filter)
         {
             if (_subclass == null)
                 EcsRunnerActivator.InitFor<TInterface>();
 
             var instance = (EcsRunner<TInterface>)Activator.CreateInstance(_subclass);
-            return (TInterface)(IEcsSystem)instance.Set(targets);
+            return (TInterface)(IEcsSystem)instance.Set(targets, isHasFilter, filter);
         }
-
-        private static Type _subclass;
-
-        protected static void SetSublcass(Type type) => _subclass = type;
+        public static TInterface Instantiate(IEnumerable<IEcsSystem> targets)
+        {
+            return Instantiate(FilterSystems(targets), false, null);
+        }
+        public static TInterface Instantiate(IEnumerable<IEcsSystem> targets, object filter)
+        {
+            return Instantiate(FilterSystems(targets, filter), true, filter);
+        }
+        #endregion
 
         protected TInterface[] targets;
+        private ReadOnlyCollection<TInterface> _targetsSealed;
+        private object _filter;
+        private bool _isHasFilter;
 
-        private EcsRunner<TInterface> Set(TInterface[] targets)
+        public IList Targets => _targetsSealed;
+        public object Filter => _filter;
+        public bool IsHasFilter => _isHasFilter;
+        private EcsRunner<TInterface> Set(TInterface[] targets, bool isHasFilter, object filter)
         {
             this.targets = targets;
+            _targetsSealed = new ReadOnlyCollection<TInterface>(targets);
+            _filter = filter;
+            _isHasFilter = isHasFilter;
             return this;
         }
+
+        internal void Rebuild(IEnumerable<IEcsSystem> targets)
+        {
+            if(_isHasFilter)
+                Set(FilterSystems(targets), _isHasFilter, _filter);
+            else
+                Set(FilterSystems(targets, _filter), _isHasFilter, _filter);
+        }
     }
 }

src/EcsSession.cs

@@ -1,160 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Linq;
-using System.Runtime.CompilerServices;
-
-namespace DCFApixels.DragonECS
-{
-    public class EcsWorldMap
-    {
-        private Dictionary<(Type, string), IEcsWorld> _worlds = new Dictionary<(Type, string), IEcsWorld>(8);
-        private bool _built = false;
-
-        public void Add<TArchetype>(EcsWorld<TArchetype> world, string name = "")
-            where TArchetype : IWorldArchetype
-        {
-            if(_built) { throw new Exception($"Cant change built {nameof(EcsWorldMap)}"); }
-            _worlds.Add((typeof(TArchetype), name), world);
-        }
-
-        public EcsWorld<TArchetype> Get<TArchetype>(string name ="")
-            where TArchetype : IWorldArchetype
-        {
-            return (EcsWorld<TArchetype>)_worlds[(typeof(TArchetype), name)];
-        }
-
-        public IEcsWorld Get(Type type, string name = "")
-        {
-            return _worlds[(type, name)];
-        }
-
-        public void Build()
-        {
-            _built = true;
-        }
-    }
-
-    public class EcsSession
-    {
-        private int _id;
-
-
-        private readonly List<IEcsSystem> _allSystems;
-        private ReadOnlyCollection<IEcsSystem> _allSystemsSealed;
-
-        private bool _isInit = false;
-        private bool _isDestoryed = false;
-
-
-        private readonly Dictionary<Type, IEcsRunner> _runners;
-        private IEcsRunSystem _runRunnerCache;
-
-        private readonly EcsWorldMap _worldMap;
-
-        #region Properties
-        public ReadOnlyCollection<IEcsSystem> AllProcessors => _allSystemsSealed;
-
-        #endregion
-
-        public EcsSession()
-        {
-            _allSystems = new List<IEcsSystem>(128);
-            _runners = new Dictionary<Type, IEcsRunner>();
-            _worldMap = new EcsWorldMap();
-        }
-
-        #region Runners
-        public T GetRunner<T>() where T : IEcsSystem
-        {
-            Type type = typeof(T);
-            if (_runners.TryGetValue(type, out IEcsRunner result))
-            {
-                return (T)result;
-            }
-            result = (IEcsRunner)EcsRunner<T>.Instantiate(_allSystems);
-            _runners.Add(type, result);
-            return (T)result;
-        }
-        #endregion
-
-        #region Configuration
-        public EcsSession Add(IEcsSystem system)
-        {
-            CheckInitForMethod(nameof(AddWorld));
-            _allSystems.Add(system);
-            return this;
-        }
-        public EcsSession AddWorld<TArchetype>(EcsWorld<TArchetype> world, string name = "")
-            where TArchetype : IWorldArchetype
-        {
-            CheckInitForMethod(nameof(AddWorld));
-            _worldMap.Add(world, name);
-            return this;
-        }
-        #endregion
-
-        #region LifeCycle
-        public EcsSession Init()
-        {
-            CheckInitForMethod(nameof(Init));
-            _worldMap.Build();
-            _allSystemsSealed = _allSystems.AsReadOnly();
-            _isInit = true;
-
-            GetRunner<IEcsInject<EcsWorldMap>>().Inject(_worldMap);
-
-            GetRunner<IEcsPreInitSystem>().PreInit(this);
-            GetRunner<IEcsInitSystem>().Init(this);
-
-            _runRunnerCache = GetRunner<IEcsRunSystem>();
-
-            return this;
-        }
-        public void Run()
-        {
-            CheckDestroyForMethod(nameof(Run));
-
-            _runRunnerCache.Run(this);
-        }
-        public void Destroy()
-        {
-            CheckDestroyForMethod(nameof(Destroy));
-            _isDestoryed = true;
-
-            GetRunner<IEcsDestroySystem>().Destroy(this);
-        }
-        #endregion
-
-        #region StateChecks
-        private void CheckInitForMethod(string methodName)
-        {
-            if (_isInit)
-                throw new MethodAccessException($"Запрещено вызывать метод {methodName}, после инициализации {nameof(EcsSession)}");
-        }
-        private void CheckDestroyForMethod(string methodName)
-        {
-            if (_isDestoryed)
-                throw new MethodAccessException($"Запрещено вызывать метод {methodName}, после уничтожения {nameof(EcsSession)}");
-        }
-        #endregion
-
-        #region EntityConvert
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public Entity ToEntity(in ent target)
-        {
-            throw new NotImplementedException();
-           // return new Entity(null, target.id);
-        }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public ent ToEnt(in Entity target)
-        {
-            throw new NotImplementedException();
-           // return new ent(target.id, target.world._gens[target.id], -1000);
-        }
-        #endregion
-
-        #region Utils
-        #endregion
-    }
-}

src/EcsSystems.cs

@@ -0,0 +1,196 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Runtime.CompilerServices;
+
+namespace DCFApixels.DragonECS
+{
+    public sealed class EcsSystems
+    {
+        private IEcsSystem[] _allSystems;
+        private Dictionary<Type, IEcsRunner> _runners;
+        private IEcsRunSystem _runRunnerCache;
+
+        private ReadOnlyCollection<IEcsSystem> _allSystemsSealed;
+        private ReadOnlyDictionary<Type, IEcsRunner> _allRunnersSealed;
+
+        private bool _isDestoryed;
+
+        #region Properties
+        public ReadOnlyCollection<IEcsSystem> AllSystems => _allSystemsSealed;
+        public ReadOnlyDictionary<Type, IEcsRunner> AllRunners => _allRunnersSealed;
+        public bool IsDestoryed => _isDestoryed;
+        #endregion
+
+        #region Constructors
+        private EcsSystems(IEcsSystem[] systems)
+        {
+            _allSystems = systems;
+            _runners = new Dictionary<Type, IEcsRunner>();
+
+            _allSystemsSealed = new ReadOnlyCollection<IEcsSystem>(_allSystems);
+            _allRunnersSealed = new ReadOnlyDictionary<Type, IEcsRunner>(_runners);
+
+            _isDestoryed = false;
+
+            GetRunner<IEcsPreInitSystem>().PreInit(this);
+            GetRunner<IEcsInitSystem>().Init(this);
+
+            _runRunnerCache = GetRunner<IEcsRunSystem>();
+        }
+        #endregion
+
+        #region Runners
+        public T GetRunner<T>() where T : IEcsSystem
+        {
+            Type type = typeof(T);
+            if (_runners.TryGetValue(type, out IEcsRunner result))
+                return (T)result;
+            result = (IEcsRunner)EcsRunner<T>.Instantiate(_allSystems);
+            _runners.Add(type, result);
+            return (T)result;
+        }
+        #endregion
+
+        #region LifeCycle
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void Run()
+        {
+#if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
+            CheckAfterDestroyForMethod(nameof(Run));
+#endif
+            _runRunnerCache.Run(this);
+        }
+        public void Destroy()
+        {
+#if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
+            CheckAfterDestroyForMethod(nameof(Destroy));
+#endif
+            _isDestoryed = true;
+            GetRunner<IEcsDestroySystem>().Destroy(this);
+        }
+        #endregion
+
+        #region StateChecks
+#if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
+        private void CheckAfterDestroyForMethod(string methodName)
+        {
+            if (_isDestoryed)
+                throw new MethodAccessException($"It is forbidden to call method {methodName}, after destroying {nameof(EcsSystems)}");
+        }
+#endif
+        #endregion
+
+        #region Builder
+        public static Builder New()
+        {
+            return new Builder();
+        }
+        public class Builder
+        {
+            private const int KEYS_CAPACITY = 4;
+            private readonly HashSet<object> _declaredBlockKeys;
+            private readonly List<object> _blockExecutionOrder;
+            private readonly Dictionary<object, List<IEcsSystem>> _systems;
+            private readonly object _basicBlocKey;
+            private bool _isBasicBlockDeclared;
+            private bool _isOnlyBasicBlock;
+            public Builder()
+            {
+                _basicBlocKey = new object();
+                _declaredBlockKeys = new HashSet<object>(KEYS_CAPACITY);
+                _blockExecutionOrder = new List<object>(KEYS_CAPACITY);
+                _systems = new Dictionary<object, List<IEcsSystem>>(KEYS_CAPACITY);
+                _isBasicBlockDeclared = false;
+                _isOnlyBasicBlock = true;
+            }
+
+            public Builder Add(IEcsSystem system, object blockKey = null)
+            {
+                if (blockKey == null) blockKey = _basicBlocKey;
+                List<IEcsSystem> list;
+                if (!_systems.TryGetValue(blockKey, out list))
+                {
+                    list = new List<IEcsSystem>();
+                    _systems.Add(blockKey, list);
+                }
+                list.Add(system);
+                return this;
+            }
+
+            public Builder Add(IEcsModule module)
+            {
+                module.ImportSystems(this);
+                return this;
+            }
+
+            public Builder BasicSystemsBlock()
+            {
+                _isBasicBlockDeclared = true;
+                _blockExecutionOrder.Add(_basicBlocKey);
+                return this;
+            }
+            public Builder SystemsBlock(object blockKey)
+            {
+                if (blockKey == null)
+                    return BasicSystemsBlock();
+
+                _isOnlyBasicBlock = false;
+                _blockExecutionOrder.Add(blockKey);
+                return this;
+            }
+
+            public EcsSystems Build()
+            {
+                if (_isOnlyBasicBlock)
+                {
+                    return new EcsSystems(_systems[_basicBlocKey].ToArray());
+                }
+
+                if(_isBasicBlockDeclared == false)
+                    _blockExecutionOrder.Insert(0, _basicBlocKey);
+
+                List<IEcsSystem> result = new List<IEcsSystem>(32);
+
+                List<IEcsSystem> basicBlockList = _systems[_basicBlocKey];
+
+                foreach (var item in _systems)
+                {
+                    if (!_blockExecutionOrder.Contains(item.Key))
+                    {
+                        basicBlockList.AddRange(item.Value);
+                    }
+                }
+                foreach (var item in _blockExecutionOrder)
+                {
+                    result.AddRange(_systems[item]);
+                }
+
+                return new EcsSystems(result.ToArray());
+            }
+        }
+        #endregion
+    }
+
+    public interface IEcsModule
+    {
+        public void ImportSystems(EcsSystems.Builder builder);
+    }
+
+    public static class EcsSystemsExt
+    {
+        public static bool IsNullOrDestroyed(this EcsSystems self)
+        {
+            return self == null || self.IsDestoryed;
+        }
+        public static EcsSystems.Builder Add(this EcsSystems.Builder self, IEnumerable<IEcsSystem> range, object blockKey = null)
+        {
+            foreach (var item in range)
+            {
+                self.Add(item, blockKey);
+            }
+            return self;
+        }
+    }
+}

src/EcsSystems.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: bb5d6e45240ecad428d33758c4cc4c49
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/EcsWorld.cs

@@ -21,9 +21,11 @@ namespace DCFApixels.DragonECS
 
         #region Methods
         public EcsPool<T> GetPool<T>() where T : struct;
-        public EcsFilter GetFilter<TInc>() where TInc : struct, IInc;
+        public EcsFilter Filter<TInc>() where TInc : struct, IInc;
         public EcsFilter GetFilter<TInc, TExc>() where TInc : struct, IInc where TExc : struct, IExc;
         public ent NewEntity();
+        public bool EntityIsAlive(int entityID, short gen);
+        public ent GetEntity(int entityID);
         public void DelEntity(int entityID);
         public void Destroy();
 
@@ -64,7 +66,7 @@ namespace DCFApixels.DragonECS
         private EcsGroup _entities;
 
         private short[] _gens;
-        private short[] _componentCounts;
+        //private short[] _componentCounts; //TODO
 
         private IEcsPool[] _pools;
         private EcsNullPool _nullPool;
@@ -86,7 +88,8 @@ namespace DCFApixels.DragonECS
             _entityDispenser = new IntDispenser();
             _nullPool = new EcsNullPool(this);
             _pools = new IEcsPool[512];
-            Array.Fill(_pools, _nullPool);
+            FillArray(_pools, _nullPool);
+            //Array.Fill(_pools, _nullPool); //TODO Fix it
             _gens = new short[512];
             _filters = new EcsFilter[64];
             _entities = new EcsGroup(this, 512);
@@ -104,7 +107,8 @@ namespace DCFApixels.DragonECS
             {
                 int oldCapacity = _pools.Length;
                 Array.Resize(ref _pools, ComponentType.Capacity);
-                Array.Fill(_pools, _nullPool, oldCapacity, oldCapacity - _pools.Length);
+                FillArray(_pools, _nullPool, oldCapacity, oldCapacity - _pools.Length);
+                //Array.Fill(_pools, _nullPool, oldCapacity, oldCapacity - _pools.Length); //TODO Fix it
 
                 Array.Resize(ref _filtersByIncludedComponents, ComponentType.Capacity);
                 Array.Resize(ref _filtersByExcludedComponents, ComponentType.Capacity);
@@ -121,7 +125,7 @@ namespace DCFApixels.DragonECS
 
         #region GetFilter
 
-        public EcsFilter GetFilter<TInc>() where TInc : struct, IInc => GetFilter<TInc, Exc>();
+        public EcsFilter Filter<TInc>() where TInc : struct, IInc => GetFilter<TInc, Exc>();
         public EcsFilter GetFilter<TInc, TExc>() where TInc : struct, IInc where TExc : struct, IExc
         {
             var mask = EcsMaskMap<TArchetype>.GetMask<TInc, Exc>();
@@ -277,19 +281,32 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
-        #region NewEntity/DelEntity
+        #region Entity
         public ent NewEntity()
         {
-            int entid = _entityDispenser.GetFree();
-            _entities.Add(entid);
-            if (_gens.Length < entid) Array.Resize(ref _gens, _gens.Length << 1);
-            return new ent(entid, _gens[entid]++, id);
+            int entityID = _entityDispenser.GetFree();
+            _entities.Add(entityID);
+            if (_gens.Length <= entityID) 
+                Array.Resize(ref _gens, _gens.Length << 1);
+            return new ent(entityID, _gens[entityID]++, id);
+        }
+        public ent GetEntity(int entityID)
+        {
+            if (_entities.Contains(entityID) == false)
+                return ent.NULL;
+
+            return new ent(entityID, _gens[entityID], id);
         }
         public void DelEntity(int entityID)
         {
             _entityDispenser.Release(entityID);
             _entities.Remove(entityID);
         }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public bool EntityIsAlive(int entityID, short gen)
+        {
+            return _entities.Contains(entityID) && _gens[entityID] == gen;
+        }
         #endregion
 
         #region Destroy
@@ -329,6 +346,22 @@ namespace DCFApixels.DragonECS
                 ComponentType.types[uniqueID] = typeof(T);
             }
         }
+
+        private void FillArray<T>(T[] array, T value, int startIndex = 0, int length = -1)
+        {
+            if (length < 0)
+            {
+                length = array.Length;
+            }
+            else
+            {
+                length = startIndex + length;
+            }
+            for (int i = startIndex; i < length; i++)
+            {
+                array[i] = value;
+            }
+        }
         #endregion
     }
 }

src/Entity.cs

@@ -5,52 +5,34 @@ using System.Runtime.InteropServices;
 
 namespace DCFApixels.DragonECS
 {
-    [StructLayout(LayoutKind.Sequential, Pack = 0, Size = 8)]
+    // id - 32 bits
+    // gen - 16 bits
+    // world - 16 bits
+    [StructLayout(LayoutKind.Explicit, Pack = 2, Size = 8)]
     public readonly struct ent : IEquatable<long>, IEquatable<ent>
     {
         public static readonly ent NULL = default;
 
-        // id - 32 bits
-        // gen - 16 bits
-        // world - 16 bits
-        public readonly long _full;
-
-        #region Properties
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public int id
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => (int)(_full >> 32);
-        }
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public ushort gen
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => (ushort)((_full << 32) >> 48);
-
-        }
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public short world
-        {
-            [MethodImpl(MethodImplOptions.AggressiveInlining)]
-            get => (short)((_full << 48) >> 48);
-
-        }
-        #endregion
+        [FieldOffset(0)]
+        private readonly long _full;
+        [FieldOffset(3)]
+        public readonly int id;
+        [FieldOffset(1)]
+        public readonly short gen;
+        [FieldOffset(0)]
+        public readonly short world;
 
         #region Constructors
         [EditorBrowsable(EditorBrowsableState.Never)]
-        public ent(int id, short gen, short world)
+        public ent(int id, short gen, short world): this()
         {
-            _full = ((long)id) << 32;
-            _full += ((long)gen) << 16;
-            _full += world;
+            this.id = id;
+            this.gen = gen;
+            this.world = world;
         }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public ent(long value)
+        internal ent(long full) : this()
         {
-            _full = value;
+            _full = full;
         }
         #endregion
 
@@ -64,14 +46,9 @@ namespace DCFApixels.DragonECS
 
         #region Equals
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool Equals(in ent other)
-        {
-            return _full == other._full;
-        }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public override bool Equals(object obj)
         {
-            return obj is ent other && Equals(in other);
+            return obj is ent other && _full == other._full;
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool Equals(ent other)
@@ -85,26 +62,39 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
+        #region ToString
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public override string ToString() => $"ent(id:{id} gen:{gen} world:{world})";
+        #endregion
+
         #region operators
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool operator ==(in ent left, in ent right) => left.Equals(in right);
+        public static bool operator ==(in ent a, in ent b) => a._full == b._full;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool operator !=(in ent left, in ent right) => !left.Equals(in right);
+        public static bool operator !=(in ent a, in ent b) => a._full != b._full;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static implicit operator long(in ent eent) => eent._full;
+        public static explicit operator long(in ent a) => a._full;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static implicit operator int(in ent eent) => eent.id;
+        public static explicit operator int(in ent a) => a.id;
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static implicit operator ent(in long value) => new ent(value);
+        public static explicit operator ent(in long a) => new ent(a);
         #endregion
     }
 
     public static partial class entExtensions
     {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool IsAlive(this ref ent self)
+        {
+            bool result = EcsWorld.Worlds[self.world].EntityIsAlive(self.id, self.gen);
+            if (!result) self = ent.NULL;
+            return result;
+        }
+
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static bool IsNull(this in ent self)
         {
@@ -136,50 +126,4 @@ namespace DCFApixels.DragonECS
             EcsWorld.Worlds[self.world].GetPool<T>().Del(self.id);
         }
     }
-
-    public struct Entity
-    {
-        public IEcsWorld world;
-        public int id;
-
-        public Entity(IEcsWorld world, int id)
-        {
-            this.world = world;
-            this.id = id;
-        }
-    }
-
-    public static partial class EntityExtensions
-    {
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsNull(this in Entity self)
-        {
-            return self.world == null;
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static ref readonly T Read<T>(this in Entity self)
-            where T : struct
-        {
-            return ref self.world.GetPool<T>().Read(self.id);
-        }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static ref T Write<T>(this in Entity self)
-            where T : struct
-        {
-            return ref self.world.GetPool<T>().Write(self.id);
-        }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool Has<T>(this in Entity self)
-            where T : struct
-        {
-            return self.world.GetPool<T>().Has(self.id);
-        }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static void Del<T>(this in Entity self)
-            where T : struct
-        {
-            self.world.GetPool<T>().Del(self.id);
-        }
-    }
 }

src/Exceptions/EcsFrameworkException.cs

@@ -7,8 +7,8 @@ namespace DCFApixels.DragonECS
     public class EcsFrameworkException : Exception
     {
         public EcsFrameworkException() { }
-        public EcsFrameworkException(string message) : base(Exceptions.MESSAGE_SUFFIX + message) { }
-        public EcsFrameworkException(string message, Exception inner) : base(Exceptions.MESSAGE_SUFFIX + message, inner) { }
+        public EcsFrameworkException(string message) : base(EcsConsts.EXCEPTION_MESSAGE_PREFIX + message) { }
+        public EcsFrameworkException(string message, Exception inner) : base(EcsConsts.EXCEPTION_MESSAGE_PREFIX + message, inner) { }
         protected EcsFrameworkException(SerializationInfo info, StreamingContext context) : base(info, context) { }
     }
 }

src/Exceptions/Exceptions.cs

@@ -1,7 +0,0 @@
-namespace DCFApixels.DragonECS
-{
-    internal static class Exceptions
-    {
-        public const string MESSAGE_SUFFIX = "[DragonECS] ";
-    }
-}

src/INFO.txt

@@ -8,3 +8,9 @@ DCFAECS_NO_SANITIZE_CHECKS - отвключение дополнительных
 
 
 #if DEBUG || !DRAGONECS_NO_SANITIZE_CHECKS
+
+
+       // [EditorBrowsable(EditorBrowsableState.Never)]
+
+
+                //throw new EcsFrameworkException($"There is no suitable EcsRunner implementation for the {typeof(T).FullName} interface");

src/Utils/SparseSet.cs

@@ -80,7 +80,7 @@ namespace DCFApixels.DragonECS
             if (_count >= _dense.Length)
                 Array.Resize(ref _dense, _dense.Length << 1);
 
-            if (value > _sparse.Length)
+            if (value >= _sparse.Length)
             {
                 int neadedSpace = _sparse.Length;
                 while (value >= neadedSpace)