Ecs changes

- BitArray has always at least sizeof(uint) bits
- Renamed Entity to EcsEntity
- Added value parameter to EcsWorld.AssignComponent
- Matched EcsWorld generic parameters
- Added Scene
- Added Entity

GlitchyEditor/src/EditWindows/ComponentEditWindow.bf

@@ -26,7 +26,7 @@ namespace GlitchyEditor.EditWindows
 
 			if(_editor.SelectedEntities.Count == 1)
 			{
-				Entity entity = _editor.SelectedEntities.Front;
+				EcsEntity entity = _editor.SelectedEntities.Front;
 
 				ShowComponents(entity);
 			}
@@ -34,7 +34,7 @@ namespace GlitchyEditor.EditWindows
 			ImGui.End();
 		}
 
-		private void ShowComponents(Entity entity)
+		private void ShowComponents(EcsEntity entity)
 		{
 			NameComponentEditor.Show(_editor.World, entity);
 			TransformComponentEditor.Show(_editor.World, entity);		
@@ -43,7 +43,7 @@ namespace GlitchyEditor.EditWindows
 
 	static class NameComponentEditor
 	{
-		public static void Show(EcsWorld world, Entity entity)
+		public static void Show(EcsWorld world, EcsEntity entity)
 		{
 			char8[128] nameBuffer = default;
 
@@ -78,7 +78,7 @@ namespace GlitchyEditor.EditWindows
 
 	static class TransformComponentEditor
 	{
-		public static void Show(EcsWorld world, Entity entity)
+		public static void Show(EcsWorld world, EcsEntity entity)
 		{
 			TransformComponent* component = world.GetComponent<TransformComponent>(entity);
 

GlitchyEditor/src/EditWindows/EntityHierarchyWindow.bf

@@ -111,7 +111,7 @@ namespace GlitchyEditor.EditWindows
 			}
 		}
 
-		private void ImGuiPrintEntityTree(TreeNode<Entity> tree)
+		private void ImGuiPrintEntityTree(TreeNode<EcsEntity> tree)
 		{
 			String name = null;
 
@@ -140,7 +140,7 @@ namespace GlitchyEditor.EditWindows
 
 			if(ImGui.BeginDragDropSource())
 			{
-				ImGui.SetDragDropPayload("DND_Entity", &tree.Value, sizeof(Entity));
+				ImGui.SetDragDropPayload("DND_Entity", &tree.Value, sizeof(EcsEntity));
 
 				ImGui.Text(name);
 
@@ -153,13 +153,13 @@ namespace GlitchyEditor.EditWindows
 
 				if(payload != null)
 				{
-					Log.ClientLogger.AssertDebug(payload.DataSize == sizeof(Entity));
+					Log.ClientLogger.AssertDebug(payload.DataSize == sizeof(EcsEntity));
 
-					Entity movedEntity = *(Entity*)payload.Data;
+					EcsEntity movedEntity = *(EcsEntity*)payload.Data;
 
 					bool dropLegal = true;
 
-					Entity walker = tree.Value;
+					EcsEntity walker = tree.Value;
 
 					// make sure the dropped entity is not a parent of the entity we dropped it on.
 					while(true)
@@ -230,9 +230,9 @@ namespace GlitchyEditor.EditWindows
 			{
 				// Show entity hierarchy as tree
 				
-				TreeNode<Entity> root = scope .(.InvalidEntity);
+				TreeNode<EcsEntity> root = scope .(.InvalidEntity);
 
-				TreeNode<Entity> AddEntity(Entity entity)
+				TreeNode<EcsEntity> AddEntity(EcsEntity entity)
 				{
 					var parent = _editor.World.GetComponent<ParentComponent>(entity);
 
@@ -264,9 +264,9 @@ namespace GlitchyEditor.EditWindows
 
 						if(payload != null)
 						{
-							Log.ClientLogger.AssertDebug(payload.DataSize == sizeof(Entity));
+							Log.ClientLogger.AssertDebug(payload.DataSize == sizeof(EcsEntity));
 
-							Entity movedEntity = *(Entity*)payload.Data;
+							EcsEntity movedEntity = *(EcsEntity*)payload.Data;
 
 							_editor.World.RemoveComponent<ParentComponent>(movedEntity);
 

GlitchyEditor/src/Editor.bf

@@ -9,26 +9,28 @@ namespace GlitchyEditor
 {
 	class Editor
 	{
-		private EcsWorld _world;
+		private EcsWorld _ecsWorld;
+		private Scene _scene;
 		
 		private EntityHierarchyWindow _entityHierarchyWindow = new .(this) ~ delete _;
 		private ComponentEditWindow _componentEditWindow = new .(this) ~ delete _;
 		private SceneViewportWindow _sceneViewportWindow = new .(this) ~ delete _;
 
-		private List<Entity> _selectedEntities = new .() ~ delete _;
+		private List<EcsEntity> _selectedEntities = new .() ~ delete _;
 
-		public EcsWorld World => _world;
+		public EcsWorld World => _ecsWorld;
 
-		public List<Entity> SelectedEntities => _selectedEntities;
+		public List<EcsEntity> SelectedEntities => _selectedEntities;
 
 		public EntityHierarchyWindow EntityHierarchyWindow => _entityHierarchyWindow;
 		public ComponentEditWindow ComponentEditWindow => _componentEditWindow;
 		public SceneViewportWindow SceneViewportWindow => _sceneViewportWindow;
 
 		/// Creates a new editor for the given world
-		public this(EcsWorld world)
+		public this(Scene scene)
 		{
-			_world = world;
+			_scene = scene;
+			_ecsWorld = _scene.[Friend]_ecsWorld;
 		}
 
 		public void Update()
@@ -39,14 +41,14 @@ namespace GlitchyEditor
 		}
 
 		/// Creates a new entity with a transform component.
-		internal Entity CreateEntityWithTransform()
+		internal EcsEntity CreateEntityWithTransform()
 		{
-			var entity = _world.NewEntity();
+			var entity = _ecsWorld.NewEntity();
 
-			var transformComponent = ref *_world.AssignComponent<TransformComponent>(entity);
+			var transformComponent = ref *_ecsWorld.AssignComponent<TransformComponent>(entity);
 			transformComponent = TransformComponent();
 
-			var nameComponent = ref *_world.AssignComponent<DebugNameComponent>(entity);
+			var nameComponent = ref *_ecsWorld.AssignComponent<DebugNameComponent>(entity);
 			nameComponent.SetName("Entity");
 
 			return entity;
@@ -56,11 +58,11 @@ namespace GlitchyEditor
 		/// Returns whether or not all selected entities have the same parent.
 		internal bool AllSelectionsOnSameLevel()
 		{
-			Entity? parent = .InvalidEntity;
+			EcsEntity? parent = .InvalidEntity;
 
 			for(var selectedEntity in _selectedEntities)
 			{
-				var parentComponent = _world.GetComponent<ParentComponent>(selectedEntity);
+				var parentComponent = _ecsWorld.GetComponent<ParentComponent>(selectedEntity);
 
 				if(parent == .InvalidEntity)
 				{
@@ -76,9 +78,9 @@ namespace GlitchyEditor
 		}
 
 		/// Finds all children of the given entity and stores their IDs in the given list.
-		internal void FindChildren(Entity entity, List<Entity> entities)
+		internal void FindChildren(EcsEntity entity, List<EcsEntity> entities)
 		{
-			for(var (child, childParent) in _world.Enumerate<ParentComponent>())
+			for(var (child, childParent) in _ecsWorld.Enumerate<ParentComponent>())
 			{
 				if(childParent.Entity == entity)
 				{
@@ -93,7 +95,7 @@ namespace GlitchyEditor
 		/// Deletes all selected entities and their children.
 		internal void DeleteSelectedEntities()
 		{
-			List<Entity> entities = scope .();
+			List<EcsEntity> entities = scope .();
 
 			for(var entity in _selectedEntities)
 			{
@@ -104,7 +106,7 @@ namespace GlitchyEditor
 
 			for(var entity in entities)
 			{
-				_world.RemoveEntity(entity);
+				_ecsWorld.RemoveEntity(entity);
 			}
 
 			_selectedEntities.Clear();

GlitchyEditor/src/EditorLayer.bf

@@ -20,7 +20,7 @@ namespace GlitchyEditor
 		BlendState _alphaBlendState ~ _?.ReleaseRef();
 		BlendState _opaqueBlendState ~ _?.ReleaseRef();
 		
-		EcsWorld _world = new EcsWorld() ~ delete _;
+		Scene _scene = new Scene() ~ delete _;
 
 		Editor _editor ~ delete _;
 
@@ -33,7 +33,7 @@ namespace GlitchyEditor
 			Application.Get().Window.IsVSync = false;
 
 			InitGraphics();
-			InitEcs();
+			//InitEcs();
 			InitEditor();
 		}
 
@@ -56,7 +56,7 @@ namespace GlitchyEditor
 			_viewportTarget.SamplerState = SamplerStateManager.LinearClamp;
 		}
 
-		private void InitEcs()
+		/*private void InitEcs()
 		{
 			_world.Register<DebugNameComponent>();
 			_world.Register<TransformComponent>();
@@ -66,18 +66,18 @@ namespace GlitchyEditor
 			_world.Register<SkinnedMeshRendererComponent>();
 			_world.Register<CameraComponent>();
 			_world.Register<AnimationComponent>();
-		}
+		}*/
 
 		private void InitEditor()
 		{
-			_editor = new Editor(_world);
+			_editor = new Editor(_scene);
 			_editor.SceneViewportWindow.ViewportSizeChangedEvent.Add(new (s, e) => ViewportSizeChanged(s, e));
 
 			_cameraController = new .(_context.SwapChain.AspectRatio);
 			_cameraController.CameraPosition = .(0, 0, -5);
 			_cameraController.TranslationSpeed = 10;
 
-			_editor.[Friend]CreateEntityWithTransform();
+			//_editor.[Friend]CreateEntityWithTransform();
 
 			_editor.SceneViewportWindow._camera = _cameraController.Camera;
 		}
@@ -87,7 +87,7 @@ namespace GlitchyEditor
 			if(_editor.SceneViewportWindow.HasFocus && Input.IsMouseButtonPressed(.RightButton))
 				_cameraController.Update(gameTime);
 
-			TransformSystem.Update(_world);
+			//TransformSystem.Update(_world);
 
 			RenderCommand.Clear(_viewportTarget, .Color | .Depth, .(0.2f, 0.2f, 0.2f), 1.0f, 0);
 
@@ -98,11 +98,18 @@ namespace GlitchyEditor
 
 			RenderCommand.SetBlendState(_opaqueBlendState);
 
-			Renderer.BeginScene(_cameraController.Camera);
+			//Renderer.BeginScene(_cameraController.Camera);
 
-			DebugRenderer.Render(_world);
+			//DebugRenderer.Render(_scene.[Friend]_ecsWorld);
+			
+			//Renderer.EndScene();
+
+			Renderer2D.BeginScene(_cameraController.Camera);
+			
+			_scene.Update(gameTime);
+			
+			Renderer2D.EndScene();
 
-			Renderer.EndScene();
 
 			RenderCommand.Clear(null, .Color | .Depth, .(0.2f, 0.2f, 0.2f), 1.0f, 0);
 

GlitchyEngine/src/Content/ModelLoader.bf

@@ -33,9 +33,9 @@ namespace GlitchyEngine.Content
 			CGLTF.Free(data);
 		}
 
-		private static void NodesToEntities(CGLTF.Data* data, CGLTF.Node* node, Entity? parentEntity, EcsWorld world, Effect validationEffect, Material material, List<AnimationClip> clips)
+		private static void NodesToEntities(CGLTF.Data* data, CGLTF.Node* node, EcsEntity? parentEntity, EcsWorld world, Effect validationEffect, Material material, List<AnimationClip> clips)
 		{
-			Entity entity = world.NewEntity();
+			EcsEntity entity = world.NewEntity();
 
 #if DEBUG
 			var nameComponent = world.AssignComponent<DebugNameComponent>(entity);
@@ -122,7 +122,7 @@ namespace GlitchyEngine.Content
 				{
 					for(var primitive in node.Mesh.Primitives)
 					{
-						Entity meshEntity = world.NewEntity();
+						EcsEntity meshEntity = world.NewEntity();
 
 						var meshParent = world.AssignComponent<ParentComponent>(meshEntity);
 						meshParent.Entity = entity;

GlitchyEngine/src/Math/BitArray.bf

@@ -18,6 +18,11 @@ namespace GlitchyEngine.Math
 
 		public this(int initialCapacity = sizeof(uint))
 		{
+			var initialCapacity;
+
+			if (initialCapacity < sizeof(uint))
+				initialCapacity = sizeof(uint);
+
 			EnsureCapacity(initialCapacity);
 		}
 

GlitchyEngine/src/Renderer/Renderer.bf

@@ -79,7 +79,7 @@ namespace GlitchyEngine.Renderer
 			LineGeometry.SetVertexLayout(layout..ReleaseRefNoDelete());
 		}
 
-		public static void BeginScene(EcsWorld world, Entity cameraEntity)
+		public static void BeginScene(EcsWorld world, EcsEntity cameraEntity)
 		{
 			Debug.Profiler.ProfileRendererFunction!();
 

GlitchyEngine/src/World/Components.bf

@@ -0,0 +1,34 @@
+using GlitchyEngine.Math;
+
+namespace GlitchyEngine.World
+{
+	struct SimpleTransformComponent
+	{
+		public Matrix Transform = Matrix.Identity;
+
+		public this()
+		{
+
+		}	
+
+		public this(Matrix transform)
+		{
+			Transform = transform;
+		}
+	}
+	
+	struct SpriterRendererComponent
+	{
+		public ColorRGBA Color = .White;
+
+		public this()
+		{
+
+		}
+
+		public this(ColorRGBA color)
+		{
+			Color = color;
+		}
+	}
+}

GlitchyEngine/src/World/EcsEntity.bf

@@ -0,0 +1,30 @@
+using System;
+
+using internal GlitchyEngine.World;
+
+namespace GlitchyEngine.World
+{
+	public struct EcsEntity : uint64
+	{	
+		// Binary Format:
+		// Bits: [0 - 31] [32 - 64]
+		// Data: Version    Index
+
+		[Inline]
+		internal uint32 Version => (uint32)this;
+
+		[Inline]
+		internal uint32 Index => (uint32)(this >> 32);
+		
+		[Inline]
+		static internal EcsEntity CreateEntityID(uint32 index, uint32 version)
+		{
+			return ((uint64)index << 32) | version;
+		}
+		
+		[Inline]
+		internal bool IsValid => Index != InvalidEntity.Index;
+
+		public const EcsEntity InvalidEntity = CreateEntityID(uint32.MaxValue, 0);
+	}
+}

GlitchyEngine/src/World/EcsWorld.bf

@@ -10,7 +10,7 @@ namespace GlitchyEngine.World
 	{
 		const int MaxEntities = 1024;
 		
-		internal typealias BitmaskEntry = (Entity ID, BitArray ComponentMask);
+		internal typealias BitmaskEntry = (EcsEntity ID, BitArray ComponentMask);
 		internal List<BitmaskEntry> _entities = new .();
 
 		List<uint32> _freeIndices = new List<uint32>() ~ delete _;
@@ -44,7 +44,7 @@ namespace GlitchyEngine.World
 		/**
 		 * Registers a new Component.
 		 */
-		public void Register<T>() where T: struct
+		public void Register<T>() where T: struct, new
 		{
 			uint32 id = (uint32)_componentPools.Count;
 			ComponentPool<T> componentPool = new ComponentPool<T>(MaxEntities);
@@ -55,7 +55,7 @@ namespace GlitchyEngine.World
 		/**
 		 * Registers a new Component.
 		 */
-		public void Register<T>() where T: struct, IDisposableComponent
+		public void Register<T>() where T: struct, new, IDisposableComponent
 		{
 			uint32 id = (uint32)_componentPools.Count;
 			ComponentPool<T> componentPool = new ComponentPool<T>(MaxEntities);
@@ -88,23 +88,23 @@ namespace GlitchyEngine.World
 		/**
 		 * Creates a new Entity and returns its ID.
 		 */
-		public Entity NewEntity()
+		public EcsEntity NewEntity()
 		{
-			Entity entity;
+			EcsEntity entity;
 
 			// Reuse freed entity slot
 			if(_freeIndices.Count > 0)
 			{
 				uint32 index = _freeIndices.PopBack();
 
-				entity = Entity.CreateEntityID(index, _entities[index].ID.Version);
+				entity = EcsEntity.CreateEntityID(index, _entities[index].ID.Version);
 
 				_entities[index].ID = entity;
 			}
 			// Create new entity slot
 			else
 			{
-				entity = Entity.CreateEntityID((.)_entities.Count, 0);
+				entity = EcsEntity.CreateEntityID((.)_entities.Count, 0);
 				_entities.Add((entity, new BitArray(_componentPools.Count)));
 			}
 
@@ -114,7 +114,7 @@ namespace GlitchyEngine.World
 		/**
 		 * Removes the specified Entity from the World.
 		 */
-		public void RemoveEntity(Entity entity)
+		public void RemoveEntity(EcsEntity entity)
 		{
 			var listEntity = ref _entities[entity.Index];
 			if(entity != listEntity.ID)
@@ -123,7 +123,7 @@ namespace GlitchyEngine.World
 			DisposeComponents(listEntity);
 
 			// Invalidate entry and increment version
-			listEntity.ID = Entity.CreateEntityID(Entity.InvalidEntity.Index, entity.Version + 1);
+			listEntity.ID = EcsEntity.CreateEntityID(EcsEntity.InvalidEntity.Index, entity.Version + 1);
 
 			_entities[entity.Index].ComponentMask.Clear();
 			_freeIndices.Add(entity.Index);
@@ -152,7 +152,7 @@ namespace GlitchyEngine.World
 		/**
 		 * Assigns a component of type T to the specified entity and returns it.
 		 */
-		public T* AssignComponent<T>(Entity entity) where T : struct, new
+		public T* AssignComponent<T>(EcsEntity entity, T value = T()) where T : struct, new
 		{
 			if(entity.Index > _entities.Count)
 				return null;
@@ -165,8 +165,12 @@ namespace GlitchyEngine.World
 			ComponentPoolEntry entry;
 			if(!_componentPools.TryGetValue(typeof(T), out entry))
 			{
-				Log.EngineLogger.AssertDebug(false, scope $"Tried to assign unregistered component type {typeof(T)}");
-				return null;
+				Register<T>();
+
+				entry = _componentPools[typeof(T)];
+
+				//Log.EngineLogger.AssertDebug(false, scope $"Tried to assign unregistered component type {typeof(T)}");
+				//return null;
 			}
 			
 			// TODO: is it a problem to assign a component again?
@@ -177,7 +181,7 @@ namespace GlitchyEngine.World
 
 			T* component = (T*)entry.Pool.Get(entity.Index);
 
-			*component = T();
+			*component = value;
 
 			return component;
 		}
@@ -185,7 +189,7 @@ namespace GlitchyEngine.World
 		/**
 		 * Removes a component of type T from the specified entity.
 		 */
-		public void RemoveComponent<T>(Entity entity) where T : struct
+		public void RemoveComponent<T>(EcsEntity entity) where T : struct, new
 		{
 			if(entity.Index > _entities.Count)
 				return;
@@ -205,7 +209,7 @@ namespace GlitchyEngine.World
 			listEntity.ComponentMask[entry.Id] = false;
 		}
 		
-		public void RemoveComponent<T>(Entity entity) where T : struct, IDisposableComponent
+		public void RemoveComponent<T>(EcsEntity entity) where T : struct, new, IDisposableComponent
 		{
 			if(entity.Index > _entities.Count)
 				return;
@@ -228,7 +232,21 @@ namespace GlitchyEngine.World
 			DisposeComponent<T>(entry.Pool.Get(entity.Index));
 		}
 
-		public T* GetComponent<T>(Entity entity) where T : struct
+		/// Returns whether or not the given entity has the specified component.
+		public bool HasComponent<T>(EcsEntity entity) where T : struct, new
+		{
+			var listEntity = ref _entities[entity.Index];
+			if(entity != listEntity.ID)
+				return false;
+			
+			ComponentPoolEntry entry;
+			if(!_componentPools.TryGetValue(typeof(T), out entry))
+				return false;
+
+			return listEntity.ComponentMask[entry.Id];
+		}
+
+		public T* GetComponent<T>(EcsEntity entity) where T : struct, new
 		{
 			var listEntity = ref _entities[entity.Index];
 			if(entity != listEntity.ID)
@@ -279,7 +297,7 @@ namespace GlitchyEngine.World
 
 			world.Register<TransformComponent>();
 
-			Entity entity = world.NewEntity();
+			EcsEntity entity = world.NewEntity();
 
 			TransformComponent* myComp = world.AssignComponent<TransformComponent>(entity);
 			myComp.LocalTransform = Matrix.Identity;
@@ -289,7 +307,7 @@ namespace GlitchyEngine.World
 
 			world.RemoveComponent<TransformComponent>(entity);
 
-			Entity entity2 = world.NewEntity();
+			EcsEntity entity2 = world.NewEntity();
 			world.AssignComponent<TransformComponent>(entity2);
 
 			world.RemoveEntity(entity);
@@ -330,7 +348,7 @@ namespace GlitchyEngine.World
 			// Test dispose on component removal
 			{
 				// Create entity with disposable component.
-				Entity entity = world.NewEntity();
+				EcsEntity entity = world.NewEntity();
 				var component = world.AssignComponent<TestDisposingComponent>(entity);
 				component.IsDisposed = false;
 	
@@ -342,7 +360,7 @@ namespace GlitchyEngine.World
 			// Test dispose on entity removal
 			{
 				// Create entity with disposable component.
-				Entity entity = world.NewEntity();
+				EcsEntity entity = world.NewEntity();
 				var component = world.AssignComponent<TestDisposingComponent>(entity);
 				component.IsDisposed = false;
 	

GlitchyEngine/src/World/Entity.bf

@@ -4,27 +4,53 @@ using internal GlitchyEngine.World;
 
 namespace GlitchyEngine.World
 {
-	public struct Entity : uint64
+	public struct Entity
 	{
-		// Binary Format:
-		// Bits: [0 - 31] [32 - 64]
-		// Data: Version    Index
+		private EcsEntity _entity = .InvalidEntity;
 
-		[Inline]
-		internal uint32 Version => (uint32)this;
+		private Scene _scene = null;
 
-		[Inline]
-		internal uint32 Index => (uint32)(this >> 32);
+		public EcsEntity Handle => _entity;
 
-		[Inline]
-		static internal Entity CreateEntityID(uint32 index, uint32 version)
+		public Scene Scene => _scene;
+
+		public this()
 		{
-			return ((uint64)index << 32) | version;
 		}
 
-		[Inline]
-		internal bool IsValid => Index != InvalidEntity.Index;
+		public this(EcsEntity entity, Scene scene)
+		{
+			_entity = entity;
+			_scene = scene;
+		}
+
+		public bool IsValid => _entity.IsValid;
+
+		public T* AddComponent<T>(T value = T()) where T: struct, new
+		{
+			Log.EngineLogger.AssertDebug(!HasComponent<T>(), scope $"Entity already has component.");
+
+			return _scene._ecsWorld.AssignComponent<T>(_entity, value);
+		}
+
+		public T* GetComponent<T>() where T: struct, new
+		{
+			Log.EngineLogger.AssertDebug(HasComponent<T>(), "Entity doesn't have component!");
+
+			return _scene._ecsWorld.GetComponent<T>(_entity);
+		}
+		
+		public bool HasComponent<T>() where T: struct, new
+		{
+			return _scene._ecsWorld.HasComponent<T>(_entity);
+		}
+		
+		public void RemoveComponent<T>() where T: struct, new
+		{
+			Log.EngineLogger.AssertDebug(HasComponent<T>(), "Entity doesn't have component!");
+
+			_scene._ecsWorld.RemoveComponent<T>(_entity);
+		}
 
-		public const Entity InvalidEntity = ((uint64)uint32.MaxValue << 32) | 0;//TODO: Report bug: CreateEntityID(uint32.MaxValue, 0);
 	}
 }

GlitchyEngine/src/World/ParentComponent.bf

@@ -5,6 +5,6 @@ namespace GlitchyEngine.World
 	 */
 	public struct ParentComponent
 	{
-		public Entity Entity;
+		public EcsEntity Entity;
 	}
 }

GlitchyEngine/src/World/Scene.bf

@@ -0,0 +1,48 @@
+using GlitchyEngine.Math;
+using GlitchyEngine.Renderer;
+using System;
+
+namespace GlitchyEngine.World
+{
+	class Scene
+	{
+		internal EcsWorld _ecsWorld = new .() ~ delete _;
+
+		public this()
+		{
+			Entity entity = CreateEntity();
+			entity.AddComponent<SpriterRendererComponent>(.(ColorRGBA(0.2f, 0.9f, 0.15f)));
+		}
+
+		public ~this()
+		{
+		}
+
+		public void Update(GameTime gameTime)
+		{
+			//TransformSystem.Update(_ecsWorld);
+
+			for (var (entity, transform, sprite) in _ecsWorld.Enumerate<SimpleTransformComponent, SpriterRendererComponent>())
+			{
+				Renderer2D.DrawQuad(transform.Transform, sprite.Color);
+			}
+
+		}
+
+		public Entity CreateEntity(String name = "")
+		{
+			Entity entity = Entity(_ecsWorld.NewEntity(), this);
+			entity.AddComponent<SimpleTransformComponent>(.(.Identity));
+
+			let nameComponent = entity.AddComponent<DebugNameComponent>();
+			nameComponent.SetName(name.IsEmpty ? "Entity" : name);
+
+			return entity;
+		}
+
+		public void DestroyEntity(Entity entity)
+		{
+			_ecsWorld.RemoveEntity(entity.Handle);
+		}
+	}
+}

GlitchyEngine/src/World/TransformSystem.bf

@@ -16,7 +16,7 @@ namespace GlitchyEngine.World
 			}
 		}
 
-		private static void UpdateEntity(Entity entity, TransformComponent* transform, EcsWorld world)
+		private static void UpdateEntity(EcsEntity entity, TransformComponent* transform, EcsWorld world)
 		{
 			// Todo: test scaling with deep hierarchies!
 

GlitchyEngine/src/World/WorldEnumerator.bf

@@ -6,7 +6,7 @@ using internal GlitchyEngine.World;
 
 namespace GlitchyEngine.World
 {
-	public struct WorldEnumerator : IEnumerator<Entity>, IDisposable
+	public struct WorldEnumerator : IEnumerator<EcsEntity>, IDisposable
 	{
 		internal EcsWorld _world;
 		internal BitArray _bitMask;
@@ -37,14 +37,14 @@ namespace GlitchyEngine.World
 			}
 		}
 
-		public Result<Entity> GetNext() mut
+		public Result<EcsEntity> GetNext() mut
 		{
 			while(_currentEntry < _endEntry)
 			{
 				EcsWorld.BitmaskEntry* entry = _currentEntry++;
 
 				// Skip deleted entities
-				if(entry.ID.Index == Entity.InvalidEntity.Index)
+				if(entry.ID.Index == EcsEntity.InvalidEntity.Index)
 					continue;
 
 				// Check whether or not mask matches
@@ -61,7 +61,7 @@ namespace GlitchyEngine.World
 		}
 	}
 
-	public struct WorldEnumerator<TComponent> : WorldEnumerator, IEnumerator<(Entity Entity, TComponent* Component)> where TComponent : struct
+	public struct WorldEnumerator<TComponent> : WorldEnumerator, IEnumerator<(EcsEntity Entity, TComponent* Component)> where TComponent : struct
 	{
 		internal EcsWorld.ComponentPoolEntry* _componentPool;
 
@@ -70,9 +70,9 @@ namespace GlitchyEngine.World
 			_componentPool = &world.GetComponentPool<TComponent>();
 		}
 
-		public new Result<(Entity Entity, TComponent* Component)> GetNext() mut
+		public new Result<(EcsEntity Entity, TComponent* Component)> GetNext() mut
 		{
-			Result<Entity> entity = base.GetNext();
+			Result<EcsEntity> entity = base.GetNext();
 
 			if(entity case .Err)
 				return .Err;
@@ -84,7 +84,7 @@ namespace GlitchyEngine.World
 	}
 
 	public struct WorldEnumerator<TComponent0, TComponent1> : WorldEnumerator,
-		IEnumerator<(Entity Entity, TComponent0* Component0, TComponent1* Component1)>
+		IEnumerator<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1)>
 		where TComponent0 : struct where TComponent1 : struct
 	{
 		internal EcsWorld.ComponentPoolEntry* _componentPool0;
@@ -96,9 +96,9 @@ namespace GlitchyEngine.World
 			_componentPool1 = &world.GetComponentPool<TComponent1>();
 		}
 
-		public new Result<(Entity Entity, TComponent0* Component0, TComponent1* Component1)> GetNext() mut
+		public new Result<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1)> GetNext() mut
 		{
-			Result<Entity> entity = base.GetNext();
+			Result<EcsEntity> entity = base.GetNext();
 
 			if(entity case .Err)
 				return .Err;
@@ -111,7 +111,7 @@ namespace GlitchyEngine.World
 	}
 
 	public struct WorldEnumerator<TComponent0, TComponent1, TComponent2> : WorldEnumerator,
-		IEnumerator<(Entity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2)>
+		IEnumerator<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2)>
 		where TComponent0 : struct where TComponent1 : struct where TComponent2 : struct
 	{
 		internal EcsWorld.ComponentPoolEntry* _componentPool0;
@@ -125,9 +125,9 @@ namespace GlitchyEngine.World
 			_componentPool2 = &world.GetComponentPool<TComponent2>();
 		}
 
-		public new Result<(Entity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2)> GetNext() mut
+		public new Result<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2)> GetNext() mut
 		{
-			Result<Entity> entity = base.GetNext();
+			Result<EcsEntity> entity = base.GetNext();
 
 			if(entity case .Err)
 				return .Err;
@@ -141,7 +141,7 @@ namespace GlitchyEngine.World
 	}
 
 	public struct WorldEnumerator<TComponent0, TComponent1, TComponent2, TComponent3> : WorldEnumerator,
-		IEnumerator<(Entity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2, TComponent3* Component3)>
+		IEnumerator<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2, TComponent3* Component3)>
 		where TComponent0 : struct where TComponent1 : struct where TComponent2 : struct where TComponent3 : struct
 	{
 		internal EcsWorld.ComponentPoolEntry* _componentPool0;
@@ -157,9 +157,9 @@ namespace GlitchyEngine.World
 			_componentPool3 = &world.GetComponentPool<TComponent3>();
 		}
 
-		public new Result<(Entity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2, TComponent3* Component3)> GetNext() mut
+		public new Result<(EcsEntity Entity, TComponent0* Component0, TComponent1* Component1, TComponent2* Component2, TComponent3* Component3)> GetNext() mut
 		{
-			Result<Entity> entity = base.GetNext();
+			Result<EcsEntity> entity = base.GetNext();
 
 			if(entity case .Err)
 				return .Err;

Sandbox/src/ExampleLayer.bf

@@ -249,8 +249,8 @@ namespace Sandbox
 				}
 			}
 
-			Entity evenCrazierParent;
-			Entity crazyParent;
+			EcsEntity evenCrazierParent;
+			EcsEntity crazyParent;
 
 			Material testMaterial1 ~ _?.ReleaseRef();
 			Material testMaterial2 ~ _?.ReleaseRef();