Rework EnTT integration

- Update EnTT to 3.11.1
- Moved EnTT wrapper to EnTTWorld, inheriting EntityWorld
- AppEntitySystemComponent can now handles multiple EntityWorld
- Headers relying on EnTT are now automatically included if NAZARA_ENTT is defined
- Renamed SystemGraph to EnttSystemGraph (as it depends on it for now)

examples/PhysicallyBasedRendering/main.cpp

@@ -3,7 +3,6 @@
 #include <Nazara/Graphics.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <array>
 #include <chrono>
 #include <iostream>
 #include <thread>

examples/Physics2DDemo/main.cpp

@@ -1,17 +1,10 @@
 #include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Platform.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
 #include <Nazara/Math/PidController.hpp>
 #include <Nazara/Physics2D.hpp>
-#include <Nazara/Physics2D/Components.hpp>
-#include <Nazara/Physics2D/Systems.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
 #include <Nazara/Widgets.hpp>
 #include <entt/entt.hpp>
 #include <array>
@@ -42,8 +35,10 @@ int main()
 	auto& windowing = app.AddComponent<Nz::AppWindowingComponent>();
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
-	Nz::Physics2DSystem& physSytem = ecs.AddSystem<Nz::Physics2DSystem>();
+
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
+	Nz::Physics2DSystem& physSytem = world.AddSystem<Nz::Physics2DSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 
 	std::string windowTitle = "Physics 2D";
 	Nz::Window& window = windowing.CreateWindow(Nz::VideoMode(1920, 1080, 32), windowTitle);
@@ -55,7 +50,7 @@ int main()
 
 	physSytem.GetPhysWorld().SetGravity({ 0.f, -98.1f });
 
-	entt::handle viewer = ecs.CreateEntity();
+	entt::handle viewer = world.CreateEntity();
 	{
 		viewer.emplace<Nz::NodeComponent>();
 		auto& cameraComponent = viewer.emplace<Nz::CameraComponent>(&windowSwapchain.GetSwapchain(), Nz::ProjectionType::Orthographic);
@@ -77,7 +72,7 @@ int main()
 	{
 		for (std::size_t x = 0; x < 30; ++x)
 		{
-			entt::handle spriteEntity = ecs.CreateEntity();
+			entt::handle spriteEntity = world.CreateEntity();
 			{
 				std::shared_ptr<Nz::Sprite> sprite = std::make_shared<Nz::Sprite>(spriteMaterial);
 				sprite->SetSize({ 32.f, 32.f });
@@ -93,7 +88,7 @@ int main()
 		}
 	}
 
-	entt::handle groundEntity = ecs.CreateEntity();
+	entt::handle groundEntity = world.CreateEntity();
 	{
 		std::shared_ptr<Nz::Tilemap> tilemap = std::make_shared<Nz::Tilemap>(Nz::Vector2ui(40, 20), Nz::Vector2f(64.f, 64.f), 18);
 		tilemap->SetOrigin({ 0.5f, 0.5f });
@@ -138,7 +133,7 @@ int main()
 
 		if (secondClock.RestartIfOver(Nz::Time::Second()))
 		{
-			window.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(ecs.GetRegistry().alive()) + " entities");
+			window.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(world.GetRegistry().alive()) + " entities");
 			fps = 0;
 		}
 	});

examples/Physics2DDemo/xmake.lua

@@ -2,3 +2,4 @@ target("Physics2DDemo")
 	add_deps("NazaraGraphics", "NazaraPhysics2D")
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

examples/PhysicsDemo/main.cpp

@@ -1,18 +1,10 @@
 #include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Platform.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
-#include <Nazara/Graphics/TextSprite.hpp>
 #include <Nazara/Math/PidController.hpp>
 #include <Nazara/Physics3D.hpp>
-#include <Nazara/Physics3D/Components.hpp>
-#include <Nazara/Physics3D/Systems.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
 #include <entt/entt.hpp>
 #include <array>
 #include <chrono>
@@ -42,8 +34,10 @@ int main()
 	auto& windowing = app.AddComponent<Nz::AppWindowingComponent>();
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
-	Nz::Physics3DSystem& physSytem = ecs.AddSystem<Nz::Physics3DSystem>();
+
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
+	Nz::Physics3DSystem& physSytem = world.AddSystem<Nz::Physics3DSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 
 	std::string windowTitle = "Physics 3D";
 	Nz::Window& window = windowing.CreateWindow(Nz::VideoMode(1920, 1080, 32), windowTitle);
@@ -107,7 +101,7 @@ int main()
 
 	Nz::Vector2ui windowSize = window.GetSize();
 
-	entt::handle viewer = ecs.CreateEntity();
+	entt::handle viewer = world.CreateEntity();
 	{
 		viewer.emplace<Nz::NodeComponent>();
 		auto& cameraComponent = viewer.emplace<Nz::CameraComponent>(&windowSwapchain.GetSwapchain());
@@ -138,7 +132,7 @@ int main()
 			colliderModel->SetMaterial(i, colliderMat);
 	}
 
-	entt::handle textEntity = ecs.CreateEntity();
+	entt::handle textEntity = world.CreateEntity();
 	{
 		auto& entityGfx = textEntity.emplace<Nz::GraphicsComponent>();
 		entityGfx.AttachRenderable(sprite, 1);
@@ -146,9 +140,9 @@ int main()
 		auto& entityNode = textEntity.emplace<Nz::NodeComponent>();
 		entityNode.SetPosition(0.f, 5.f, 0.f);
 	}
-	entt::handle playerEntity = ecs.CreateEntity();
+	entt::handle playerEntity = world.CreateEntity();
 
-	entt::handle headingEntity = ecs.CreateEntity();
+	entt::handle headingEntity = world.CreateEntity();
 	{
 		auto& entityLight = playerEntity.emplace<Nz::LightComponent>();
 		auto& spotLight = entityLight.AddLight<Nz::SpotLight>(1);
@@ -179,7 +173,7 @@ int main()
 		{
 			for (std::size_t z = 0; z < 3; ++z)
 			{
-				entt::handle entity = ecs.CreateEntity();
+				entt::handle entity = world.CreateEntity();
 				auto& entityGfx = entity.emplace<Nz::GraphicsComponent>();
 				entityGfx.AttachRenderable(model, 1);
 
@@ -222,20 +216,20 @@ int main()
 			showColliders = !showColliders;
 			if (showColliders)
 			{
-				auto view = ecs.GetRegistry().view<Nz::GraphicsComponent, Nz::RigidBody3DComponent>();
+				auto view = world.GetRegistry().view<Nz::GraphicsComponent, Nz::RigidBody3DComponent>();
 				for (auto [entity, gfxComponent, _] : view.each())
 					gfxComponent.AttachRenderable(colliderModel, 1);
 			}
 			else
 			{
-				auto view = ecs.GetRegistry().view<Nz::GraphicsComponent, Nz::RigidBody3DComponent>();
+				auto view = world.GetRegistry().view<Nz::GraphicsComponent, Nz::RigidBody3DComponent>();
 				for (auto [entity, gfxComponent, _] : view.each())
 					gfxComponent.DetachRenderable(colliderModel);
 			}
 		}
 		else if (event.virtualKey == Nz::Keyboard::VKey::Space)
 		{
-			entt::handle entity = ecs.CreateEntity();
+			entt::handle entity = world.CreateEntity();
 			auto& entityGfx = entity.emplace<Nz::GraphicsComponent>();
 			entityGfx.AttachRenderable(model, 1);
 			if (showColliders)
@@ -270,7 +264,7 @@ int main()
 		{
 			float elapsedTime = deltaTime->AsSeconds();
 
-			auto spaceshipView = ecs.GetRegistry().view<Nz::NodeComponent, Nz::RigidBody3DComponent>();
+			auto spaceshipView = world.GetRegistry().view<Nz::NodeComponent, Nz::RigidBody3DComponent>();
 			for (auto&& [entity, node, _] : spaceshipView.each())
 			{
 				if (entity == playerEntity)
@@ -278,7 +272,7 @@ int main()
 
 				Nz::Vector3f spaceshipPos = node.GetPosition(Nz::CoordSys::Global);
 				if (spaceshipPos.GetSquaredLength() > Nz::IntegralPow(20.f, 2))
-					ecs.GetRegistry().destroy(entity);
+					world.GetRegistry().destroy(entity);
 			}
 
 			Nz::RigidBody3DComponent& playerShipBody = playerEntity.get<Nz::RigidBody3DComponent>();
@@ -320,7 +314,7 @@ int main()
 
 		if (fpsClock.RestartIfOver(Nz::Time::Second()))
 		{
-			window.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(ecs.GetRegistry().alive()) + " entities");
+			window.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(world.GetRegistry().alive()) + " entities");
 			fps = 0;
 		}
 	});

examples/PhysicsDemo/xmake.lua

@@ -2,3 +2,4 @@ target("PhysicsDemo")
 	add_deps("NazaraGraphics", "NazaraPhysics3D")
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

examples/Showcase/main.cpp

@@ -1,19 +1,10 @@
 #include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Platform.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/TextSprite.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
 #include <Nazara/Math/PidController.hpp>
 #include <Nazara/Physics3D.hpp>
-#include <Nazara/Physics3D/Components.hpp>
-#include <Nazara/Physics3D/Systems.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
-#include <Nazara/Utility/Systems.hpp>
 #include <Nazara/Utility/Plugins/AssimpPlugin.hpp>
 #include <Nazara/Utils/CallOnExit.hpp>
 #include <NZSL/Math/FieldOffsets.hpp>
@@ -46,10 +37,12 @@ int main()
 	std::shared_ptr<Nz::RenderDevice> device = Nz::Graphics::Instance()->GetRenderDevice();
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
-	ecs.AddSystem<Nz::SkeletonSystem>();
 
-	Nz::Physics3DSystem& physSytem = ecs.AddSystem<Nz::Physics3DSystem>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	world.AddSystem<Nz::SkeletonSystem>();
+
+	Nz::Physics3DSystem& physSytem = world.AddSystem<Nz::Physics3DSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 
 	auto& windowing = app.AddComponent<Nz::AppWindowingComponent>();
 
@@ -62,9 +55,9 @@ int main()
 	Nz::TextureParams texParams;
 	texParams.renderDevice = device;
 
-	entt::handle playerEntity = ecs.CreateEntity();
+	entt::handle playerEntity = world.CreateEntity();
-	entt::handle playerRotation = ecs.CreateEntity();
+	entt::handle playerRotation = world.CreateEntity();
-	entt::handle playerCamera = ecs.CreateEntity();
+	entt::handle playerCamera = world.CreateEntity();
 	{
 		auto& playerNode = playerEntity.emplace<Nz::NodeComponent>();
 		playerNode.SetPosition(0.f, 1.8f, 1.f);
@@ -166,8 +159,8 @@ int main()
 		}
 	}*/
 
-	entt::handle bobEntity = ecs.CreateEntity();
+	entt::handle bobEntity = world.CreateEntity();
-	entt::handle lightEntity1 = ecs.CreateEntity();
+	entt::handle lightEntity1 = world.CreateEntity();
 	{
 		auto& lightNode = lightEntity1.emplace<Nz::NodeComponent>();
 		lightNode.SetPosition(Nz::Vector3f::Up() * 3.f + Nz::Vector3f::Backward() * 1.f);
@@ -182,7 +175,7 @@ int main()
 		spotLight.EnableShadowCasting(true);
 	}
 
-	entt::handle lightEntity2 = ecs.CreateEntity();
+	entt::handle lightEntity2 = world.CreateEntity();
 	{
 		auto& lightNode = lightEntity2.emplace<Nz::NodeComponent>();
 		lightNode.SetPosition(Nz::Vector3f::Up() * 3.5f + Nz::Vector3f::Right() * 1.5f);
@@ -196,7 +189,7 @@ int main()
 		spotLight.UpdateShadowMapSize(1024);
 	}
 
-	entt::handle lightEntity3 = ecs.CreateEntity();
+	entt::handle lightEntity3 = world.CreateEntity();
 
 	{
 		auto& bobNode = bobEntity.emplace<Nz::NodeComponent>();
@@ -209,7 +202,7 @@ int main()
 
 		auto& sharedSkeleton = bobEntity.emplace<Nz::SharedSkeletonComponent>(skeleton);
 
-		entt::handle sphereEntity = ecs.CreateEntity();
+		entt::handle sphereEntity = world.CreateEntity();
 		{
 			std::shared_ptr<Nz::Mesh> sphereMesh = std::make_shared<Nz::Mesh>();
 			sphereMesh->CreateStatic();
@@ -242,7 +235,7 @@ int main()
 			sphereGfx.AttachRenderable(sphereModel, 0xFFFFFFFF);
 		}
 
-		entt::handle smallBobEntity = ecs.CreateEntity();
+		entt::handle smallBobEntity = world.CreateEntity();
 		auto& smallBobNode = smallBobEntity.emplace<Nz::NodeComponent>();
 		smallBobNode.SetParentJoint(bobEntity, "LeftHand");
 
@@ -297,7 +290,7 @@ int main()
 	sprite->UpdateRenderLayer(1);
 	sprite->Update(Nz::SimpleTextDrawer::Draw("Shadow-mapping !", 72), 0.002f);
 
-	entt::handle textEntity = ecs.CreateEntity();
+	entt::handle textEntity = world.CreateEntity();
 	{
 		auto& entityGfx = textEntity.emplace<Nz::GraphicsComponent>();
 		entityGfx.AttachRenderable(sprite, 1);
@@ -307,7 +300,7 @@ int main()
 		entityNode.SetRotation(Nz::EulerAnglesf(-45.f, 0.f, 0.f));
 	}
 
-	entt::handle planeEntity = ecs.CreateEntity();
+	entt::handle planeEntity = world.CreateEntity();
 	Nz::Boxf floorBox;
 	{
 		Nz::MeshParams meshPrimitiveParams;
@@ -353,7 +346,7 @@ int main()
 		std::shared_ptr<Nz::Model> boxModel = std::make_shared<Nz::Model>(std::move(boxMeshGfx), boxMesh.GetAABB());
 		boxModel->SetMaterial(0, planeMat);
 
-		entt::handle boxEntity = ecs.CreateEntity();
+		entt::handle boxEntity = world.CreateEntity();
 		boxEntity.emplace<Nz::NodeComponent>().SetPosition(Nz::Vector3f(0.f, 0.25f, -0.5f));
 		boxEntity.emplace<Nz::GraphicsComponent>().AttachRenderable(boxModel, 0xFFFFFFFF);
 	}
@@ -517,7 +510,7 @@ int main()
 
 		if (fpsClock.RestartIfOver(Nz::Time::Second()))
 		{
-			mainWindow.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(ecs.GetRegistry().alive()) + " entities");
+			mainWindow.SetTitle(windowTitle + " - " + Nz::NumberToString(fps) + " FPS" + " - " + Nz::NumberToString(world.GetRegistry().alive()) + " entities");
 			fps = 0;
 		}
 	});

examples/Showcase/xmake.lua

@@ -5,3 +5,4 @@ target("Showcase")
 	add_deps("PluginAssimp", { links = {} })
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

examples/Tut01/main.cpp

@@ -1,15 +1,10 @@
 // Sources pour https://github.com/NazaraEngine/NazaraEngine/wiki/(FR)-Tutoriel:-%5B01%5D-Hello-World
 
-#include <Nazara/Core/Application.hpp>
+#include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
 #include <Nazara/Platform/AppWindowingComponent.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
 #include <iostream>
 
 int main()
@@ -20,11 +15,12 @@ int main()
 	Nz::Window& mainWindow = windowing.CreateWindow(Nz::VideoMode(1280, 720), "Tut01 - Hello world");
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
 
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 	auto& windowSwapchain = renderSystem.CreateSwapchain(mainWindow);
 
-	entt::handle cameraEntity = ecs.CreateEntity();
+	entt::handle cameraEntity = world.CreateEntity();
 	{
 		cameraEntity.emplace<Nz::NodeComponent>();
 
@@ -40,7 +36,7 @@ int main()
 	std::shared_ptr<Nz::TextSprite> textSprite = std::make_shared<Nz::TextSprite>();
 	textSprite->Update(textDrawer);
 
-	entt::handle textEntity = ecs.CreateEntity();
+	entt::handle textEntity = world.CreateEntity();
 	{
 		auto& nodeComponent = textEntity.emplace<Nz::NodeComponent>();
 		auto& gfxComponent = textEntity.emplace<Nz::GraphicsComponent>();

examples/Tut01/xmake.lua

@@ -2,3 +2,4 @@ target("Tut01_HelloWorld")
 	add_deps("NazaraGraphics")
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

examples/Tut02/main.cpp

@@ -1,15 +1,10 @@
 // Sources pour https://github.com/NazaraEngine/NazaraEngine/wiki/(FR)-Tutoriel:-%5B02%5D-Gestion-des-événements
 
-#include <Nazara/Core/Application.hpp>
+#include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
 #include <Nazara/Platform/AppWindowingComponent.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
 #include <iostream>
 
 int main()
@@ -20,11 +15,12 @@ int main()
 	Nz::Window& mainWindow = windowing.CreateWindow(Nz::VideoMode(1280, 720), "Tut02 - Hello world");
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
 
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 	auto& windowSwapchain = renderSystem.CreateSwapchain(mainWindow);
 
-	entt::handle cameraEntity = ecs.CreateEntity();
+	entt::handle cameraEntity = world.CreateEntity();
 	{
 		cameraEntity.emplace<Nz::NodeComponent>();
 
@@ -40,7 +36,7 @@ int main()
 	std::shared_ptr<Nz::TextSprite> textSprite = std::make_shared<Nz::TextSprite>();
 	textSprite->Update(textDrawer);
 
-	entt::handle textEntity = ecs.CreateEntity();
+	entt::handle textEntity = world.CreateEntity();
 	{
 		auto& nodeComponent = textEntity.emplace<Nz::NodeComponent>();
 		auto& gfxComponent = textEntity.emplace<Nz::GraphicsComponent>();

examples/Tut02/xmake.lua

@@ -2,3 +2,4 @@ target("Tut02_Events")
 	add_deps("NazaraGraphics")
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

examples/WidgetDemo/main.cpp

@@ -1,21 +1,11 @@
 #include <Nazara/Core.hpp>
-#include <Nazara/Core/AppEntitySystemComponent.hpp>
-#include <Nazara/Core/Systems.hpp>
 #include <Nazara/Platform.hpp>
 #include <Nazara/Graphics.hpp>
-#include <Nazara/Graphics/TextSprite.hpp>
-#include <Nazara/Graphics/Components.hpp>
-#include <Nazara/Graphics/Systems.hpp>
 #include <Nazara/Math/PidController.hpp>
 #include <Nazara/Physics3D.hpp>
-#include <Nazara/Physics3D/Components.hpp>
-#include <Nazara/Physics3D/Systems.hpp>
 #include <Nazara/Renderer.hpp>
 #include <Nazara/Utility.hpp>
-#include <Nazara/Utility/Components.hpp>
 #include <Nazara/Widgets.hpp>
-#include <Nazara/Widgets/ImageButtonWidget.hpp>
-#include <Nazara/Widgets/ScrollAreaWidget.hpp>
 #include <entt/entt.hpp>
 #include <array>
 #include <iostream>
@@ -40,6 +30,7 @@ int main()
 	Nz::Window& mainWindow = windowing.CreateWindow(Nz::VideoMode(1920, 1080), "Widget demo");
 
 	auto& ecs = app.AddComponent<Nz::AppEntitySystemComponent>();
+	auto& world = ecs.AddWorld<Nz::EnttWorld>();
 
 	auto& fs = app.AddComponent<Nz::AppFilesystemComponent>();
 	{
@@ -50,10 +41,10 @@ int main()
 		fs.Mount("assets", resourceDir);
 	}
 
-	Nz::RenderSystem& renderSystem = ecs.AddSystem<Nz::RenderSystem>();
+	Nz::RenderSystem& renderSystem = world.AddSystem<Nz::RenderSystem>();
 	auto& windowSwapchain = renderSystem.CreateSwapchain(mainWindow);
 
-	Nz::Canvas canvas2D(ecs.GetRegistry(), mainWindow.GetEventHandler(), mainWindow.GetCursorController().CreateHandle(), 0xFFFFFFFF);
+	Nz::Canvas canvas2D(world, mainWindow.GetEventHandler(), mainWindow.GetCursorController().CreateHandle(), 0xFFFFFFFF);
 	canvas2D.Resize(Nz::Vector2f(mainWindow.GetSize()));
 
 	Nz::LabelWidget* labelWidget = canvas2D.Add<Nz::LabelWidget>();
@@ -119,7 +110,7 @@ int main()
 	textAreaWidget2->SetBackgroundColor(Nz::Color::White());
 	textAreaWidget2->SetTextColor(Nz::Color::Black());*/
 
-	entt::handle viewer2D = ecs.CreateEntity();
+	entt::handle viewer2D = world.CreateEntity();
 	{
 		viewer2D.emplace<Nz::NodeComponent>();
 

examples/WidgetDemo/xmake.lua

@@ -2,3 +2,4 @@ target("WidgetDemo")
 	add_deps("NazaraGraphics", "NazaraPhysics3D", "NazaraWidgets")
 	add_packages("entt")
 	add_files("main.cpp")
+	add_defines("NAZARA_ENTT")

include/Nazara/Audio.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Audio module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Core.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Core module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -47,6 +47,7 @@
 #include <Nazara/Core/Core.hpp>
 #include <Nazara/Core/DynLib.hpp>
 #include <Nazara/Core/EmptyStream.hpp>
+#include <Nazara/Core/EntityWorld.hpp>
 #include <Nazara/Core/Enums.hpp>
 #include <Nazara/Core/Error.hpp>
 #include <Nazara/Core/ErrorFlags.hpp>
@@ -77,6 +78,7 @@
 #include <Nazara/Core/ResourceLoader.hpp>
 #include <Nazara/Core/ResourceManager.hpp>
 #include <Nazara/Core/ResourceParameters.hpp>
+#include <Nazara/Core/ResourceRegistry.hpp>
 #include <Nazara/Core/ResourceSaver.hpp>
 #include <Nazara/Core/SerializationContext.hpp>
 #include <Nazara/Core/StdLogger.hpp>
@@ -89,4 +91,14 @@
 #include <Nazara/Core/Uuid.hpp>
 #include <Nazara/Core/VirtualDirectory.hpp>
 
+#ifdef NAZARA_ENTT
+
+#include <Nazara/Core/AppEntitySystemComponent.hpp>
+#include <Nazara/Core/Components.hpp>
+#include <Nazara/Core/EnttSystemGraph.hpp>
+#include <Nazara/Core/EnttWorld.hpp>
+#include <Nazara/Core/Systems.hpp>
+
+#endif
+
 #endif // NAZARA_GLOBAL_CORE_HPP

include/Nazara/Core/AppEntitySystemComponent.hpp

@@ -10,25 +10,19 @@
 #include <Nazara/Prerequisites.hpp>
 #include <Nazara/Core/ApplicationComponent.hpp>
 #include <Nazara/Core/Config.hpp>
-#include <Nazara/Core/Systems/SystemGraph.hpp>
+#include <Nazara/Core/EntityWorld.hpp>
 
 namespace Nz
 {
 	class NAZARA_CORE_API AppEntitySystemComponent : public ApplicationComponent
 	{
 		public:
-			inline AppEntitySystemComponent(ApplicationBase& app);
+			using ApplicationComponent::ApplicationComponent;
 			AppEntitySystemComponent(const AppEntitySystemComponent&) = delete;
 			AppEntitySystemComponent(AppEntitySystemComponent&&) = delete;
 			~AppEntitySystemComponent() = default;
 
-			template<typename T, typename... Args> T& AddSystem(Args&&... args);
+			template<typename T, typename... Args> T& AddWorld(Args&&... args);
-
-			entt::handle CreateEntity();
-
-			entt::registry& GetRegistry();
-			const entt::registry& GetRegistry() const;
-			template<typename T> T& GetSystem() const;
 
 			void Update(Time elapsedTime) override;
 
@@ -36,8 +30,7 @@ namespace Nz
 			AppEntitySystemComponent& operator=(AppEntitySystemComponent&&) = delete;
 
 		private:
-			entt::registry m_registry;
+			std::vector<std::unique_ptr<EntityWorld>> m_worlds;
-			SystemGraph m_systemGraph;
 	};
 }
 

include/Nazara/Core/AppEntitySystemComponent.inl

@@ -7,37 +7,10 @@
 
 namespace Nz
 {
-	inline AppEntitySystemComponent::AppEntitySystemComponent(ApplicationBase& app) :
-	ApplicationComponent(app),
-	m_systemGraph(m_registry)
-	{
-	}
-
 	template<typename T, typename... Args>
-	T& AppEntitySystemComponent::AddSystem(Args&&... args)
+	T& AppEntitySystemComponent::AddWorld(Args&&... args)
 	{
-		return m_systemGraph.AddSystem<T>(std::forward<Args>(args)...);
+		return static_cast<T&>(*m_worlds.emplace_back(std::make_unique<T>(std::forward<Args>(args)...)));
-	}
-
-	inline entt::handle AppEntitySystemComponent::CreateEntity()
-	{
-		return entt::handle(m_registry, m_registry.create());
-	}
-
-	inline entt::registry& AppEntitySystemComponent::GetRegistry()
-	{
-		return m_registry;
-	}
-
-	inline const entt::registry& AppEntitySystemComponent::GetRegistry() const
-	{
-		return m_registry;
-	}
-
-	template<typename T>
-	T& AppEntitySystemComponent::GetSystem() const
-	{
-		return m_systemGraph.GetSystem<T>();
 	}
 }
 

include/Nazara/Core/Components.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Core module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Core/EntityWorld.hpp

@@ -0,0 +1,33 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_CORE_ENTITYWORLD_HPP
+#define NAZARA_CORE_ENTITYWORLD_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Config.hpp>
+#include <Nazara/Core/Time.hpp>
+
+namespace Nz
+{
+	class NAZARA_CORE_API EntityWorld
+	{
+		public:
+			EntityWorld() = default;
+			EntityWorld(const EntityWorld&) = default;
+			EntityWorld(EntityWorld&&) = default;
+			virtual ~EntityWorld();
+
+			virtual void Update(Time elapsedTime) = 0;
+
+			EntityWorld& operator=(const EntityWorld&) = default;
+			EntityWorld& operator=(EntityWorld&&) = default;
+	};
+}
+
+#include <Nazara/Core/EntityWorld.inl>
+
+#endif // NAZARA_CORE_ENTITYWORLD_HPP

include/Nazara/Core/EntityWorld.inl

@@ -0,0 +1,12 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/EntityWorld.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+}
+
+#include <Nazara/Core/DebugOff.hpp>

include/Nazara/Core/EnttSystemGraph.hpp

@@ -4,8 +4,8 @@
 
 #pragma once
 
-#ifndef NAZARA_CORE_SYSTEMS_SYSTEMGRAPH_HPP
+#ifndef NAZARA_CORE_ENTTSYSTEMGRAPH_HPP
-#define NAZARA_CORE_SYSTEMS_SYSTEMGRAPH_HPP
+#define NAZARA_CORE_ENTTSYSTEMGRAPH_HPP
 
 #include <Nazara/Prerequisites.hpp>
 #include <Nazara/Core/Clock.hpp>
@@ -18,13 +18,13 @@
 
 namespace Nz
 {
-	class NAZARA_CORE_API SystemGraph
+	class NAZARA_CORE_API EnttSystemGraph
 	{
 		public:
-			inline SystemGraph(entt::registry& registry);
+			inline EnttSystemGraph(entt::registry& registry);
-			SystemGraph(const SystemGraph&) = delete;
+			EnttSystemGraph(const EnttSystemGraph&) = delete;
-			SystemGraph(SystemGraph&&) = delete;
+			EnttSystemGraph(EnttSystemGraph&&) = delete;
-			~SystemGraph() = default;
+			~EnttSystemGraph() = default;
 
 			template<typename T, typename... Args> T& AddSystem(Args&&... args);
 
@@ -33,8 +33,8 @@ namespace Nz
 			void Update();
 			void Update(Time elapsedTime);
 
-			SystemGraph& operator=(const SystemGraph&) = delete;
+			EnttSystemGraph& operator=(const EnttSystemGraph&) = delete;
-			SystemGraph& operator=(SystemGraph&&) = delete;
+			EnttSystemGraph& operator=(EnttSystemGraph&&) = delete;
 
 		private:
 			struct NAZARA_CORE_API NodeBase
@@ -65,6 +65,6 @@ namespace Nz
 	};
 }
 
-#include <Nazara/Core/Systems/SystemGraph.inl>
+#include <Nazara/Core/EnttSystemGraph.inl>
 
-#endif // NAZARA_CORE_SYSTEMS_SYSTEMGRAPH_HPP
+#endif // NAZARA_CORE_ENTTSYSTEMGRAPH_HPP

include/Nazara/Core/EnttSystemGraph.inl

@@ -2,7 +2,7 @@
 // This file is part of the "Nazara Engine - Core module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
-#include <Nazara/Core/Systems/SystemGraph.hpp>
+#include <Nazara/Core/EnttSystemGraph.hpp>
 #include <Nazara/Core/Error.hpp>
 #include <stdexcept>
 #include <Nazara/Core/Debug.hpp>
@@ -12,44 +12,44 @@ namespace Nz
 	namespace Detail
 	{
 		template<typename, typename = void>
-		struct SystemGraphAllowConcurrent : std::bool_constant<true> {};
+		struct EnttSystemGraphAllowConcurrent : std::bool_constant<true> {};
 
 		template<typename T>
-		struct SystemGraphAllowConcurrent<T, std::void_t<decltype(T::AllowConcurrent)>> : std::bool_constant<T::AllowConcurrent> {};
+		struct EnttSystemGraphAllowConcurrent<T, std::void_t<decltype(T::AllowConcurrent)>> : std::bool_constant<T::AllowConcurrent> {};
 
 		template<typename, typename = void>
-		struct SystemGraphExecutionOrder : std::integral_constant<Int64, 0> {};
+		struct EnttSystemGraphExecutionOrder : std::integral_constant<Int64, 0> {};
 
 		template<typename T>
-		struct SystemGraphExecutionOrder<T, std::void_t<decltype(T::ExecutionOrder)>> : std::integral_constant<Int64, T::ExecutionOrder> {};
+		struct EnttSystemGraphExecutionOrder<T, std::void_t<decltype(T::ExecutionOrder)>> : std::integral_constant<Int64, T::ExecutionOrder> {};
 	}
 
 	template<typename T>
 	template<typename... Args>
-	SystemGraph::Node<T>::Node(Args&&... args) :
+	EnttSystemGraph::Node<T>::Node(Args&&... args) :
 	system(std::forward<Args>(args)...)
 	{
 	}
 
 	template<typename T>
-	void SystemGraph::Node<T>::Update(Time elapsedTime)
+	void EnttSystemGraph::Node<T>::Update(Time elapsedTime)
 	{
 		system.Update(elapsedTime);
 	}
 
-	inline SystemGraph::SystemGraph(entt::registry& registry) :
+	inline EnttSystemGraph::EnttSystemGraph(entt::registry& registry) :
 	m_registry(registry),
 	m_systemOrderUpdated(true)
 	{
 	}
 
 	template<typename T, typename... Args>
-	T& SystemGraph::AddSystem(Args&&... args)
+	T& EnttSystemGraph::AddSystem(Args&&... args)
 	{
 		NazaraAssert(m_systemToNodes.find(entt::type_hash<T>()) == m_systemToNodes.end(), "this system already exists");
 
 		auto nodePtr = std::make_unique<Node<T>>(m_registry, std::forward<Args>(args)...);
-		nodePtr->executionOrder = Detail::SystemGraphExecutionOrder<T>();
+		nodePtr->executionOrder = Detail::EnttSystemGraphExecutionOrder<T>();
 
 		T& system = nodePtr->system;
 
@@ -63,7 +63,7 @@ namespace Nz
 	}
 
 	template<typename T>
-	T& SystemGraph::GetSystem() const
+	T& EnttSystemGraph::GetSystem() const
 	{
 		auto it = m_systemToNodes.find(entt::type_hash<T>());
 		if (it == m_systemToNodes.end())

include/Nazara/Core/EnttWorld.hpp

@@ -0,0 +1,49 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_CORE_ENTTWORLD_HPP
+#define NAZARA_CORE_ENTTWORLD_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/ApplicationComponent.hpp>
+#include <Nazara/Core/EntityWorld.hpp>
+#include <Nazara/Core/EnttSystemGraph.hpp>
+
+namespace Nz
+{
+	class NAZARA_CORE_API EnttWorld : public EntityWorld
+	{
+		public:
+			EnttWorld();
+			EnttWorld(const EnttWorld&) = default;
+			EnttWorld(EnttWorld&&) = default;
+			~EnttWorld() = default;
+
+			template<typename T, typename... Args> T& AddSystem(Args&&... args);
+
+			entt::handle CreateEntity();
+
+			entt::registry& GetRegistry();
+			const entt::registry& GetRegistry() const;
+			template<typename T> T& GetSystem() const;
+
+			void Update(Time elapsedTime) override;
+
+			operator entt::registry&();
+			operator const entt::registry&() const;
+
+			EnttWorld& operator=(const EnttWorld&) = delete;
+			EnttWorld& operator=(EnttWorld&&) = delete;
+
+		private:
+			entt::registry m_registry;
+			EnttSystemGraph m_systemGraph;
+	};
+}
+
+#include <Nazara/Core/EnttWorld.inl>
+
+#endif // NAZARA_CORE_ENTTWORLD_HPP

include/Nazara/Core/EnttWorld.inl

@@ -0,0 +1,53 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/EnttWorld.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	inline EnttWorld::EnttWorld() :
+	m_systemGraph(m_registry)
+	{
+	}
+
+	template<typename T, typename... Args>
+	T& EnttWorld::AddSystem(Args&&... args)
+	{
+		return m_systemGraph.AddSystem<T>(std::forward<Args>(args)...);
+	}
+
+	inline entt::handle EnttWorld::CreateEntity()
+	{
+		return entt::handle(m_registry, m_registry.create());
+	}
+
+	inline entt::registry& EnttWorld::GetRegistry()
+	{
+		return m_registry;
+	}
+
+	inline const entt::registry& EnttWorld::GetRegistry() const
+	{
+		return m_registry;
+	}
+
+	template<typename T>
+	T& EnttWorld::GetSystem() const
+	{
+		return m_systemGraph.GetSystem<T>();
+	}
+
+	inline EnttWorld::operator entt::registry&()
+	{
+		return m_registry;
+	}
+
+	inline EnttWorld::operator const entt::registry&() const
+	{
+		return m_registry;
+	}
+}
+
+#include <Nazara/Core/DebugOff.hpp>

include/Nazara/Core/Systems.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Core module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -30,6 +30,5 @@
 #define NAZARA_CORE_SYSTEMS_HPP
 
 #include <Nazara/Core/Systems/LifetimeSystem.hpp>
-#include <Nazara/Core/Systems/SystemGraph.hpp>
 
 #endif // NAZARA_CORE_SYSTEMS_HPP

include/Nazara/Graphics.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Graphics module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -91,4 +91,11 @@
 #include <Nazara/Graphics/ViewerInstance.hpp>
 #include <Nazara/Graphics/WorldInstance.hpp>
 
+#ifdef NAZARA_ENTT
+
+#include <Nazara/Graphics/Components.hpp>
+#include <Nazara/Graphics/Systems.hpp>
+
+#endif
+
 #endif // NAZARA_GLOBAL_GRAPHICS_HPP

include/Nazara/Graphics/Components.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Graphics module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Graphics/Systems.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Graphics module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Math.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Math module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (Lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (Lynix680@gmail.com)
 	                   Rémi "overdrivr" Bèges (remi.beges@laposte.net)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of

include/Nazara/Network.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Network module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/OpenGLRenderer.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - OpenGL renderer
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/OpenGLRenderer/Wrapper.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - OpenGL renderer
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Physics2D.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics2D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -38,4 +38,11 @@
 #include <Nazara/Physics2D/PhysWorld2D.hpp>
 #include <Nazara/Physics2D/RigidBody2D.hpp>
 
+#ifdef NAZARA_ENTT
+
+#include <Nazara/Physics2D/Components.hpp>
+#include <Nazara/Physics2D/Systems.hpp>
+
+#endif
+
 #endif // NAZARA_GLOBAL_PHYSICS2D_HPP

include/Nazara/Physics2D/Components.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics2D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Physics2D/Systems.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics2D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Physics3D.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics3D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -36,4 +36,11 @@
 #include <Nazara/Physics3D/PhysWorld3D.hpp>
 #include <Nazara/Physics3D/RigidBody3D.hpp>
 
+#ifdef NAZARA_ENTT
+
+#include <Nazara/Physics3D/Components.hpp>
+#include <Nazara/Physics3D/Systems.hpp>
+
+#endif
+
 #endif // NAZARA_GLOBAL_PHYSICS3D_HPP

include/Nazara/Physics3D/Components.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics3D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Physics3D/Systems.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Physics3D module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Platform.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Platform module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Renderer.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Renderer module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Utility.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Utility module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in
@@ -70,4 +70,11 @@
 #include <Nazara/Utility/VertexMapper.hpp>
 #include <Nazara/Utility/VertexStruct.hpp>
 
+#ifdef NAZARA_ENTT
+
+#include <Nazara/Utility/Components.hpp>
+#include <Nazara/Utility/Systems.hpp>
+
+#endif
+
 #endif // NAZARA_GLOBAL_UTILITY_HPP

include/Nazara/Utility/Components.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Utility module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Utility/Systems.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Utility module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/VulkanRenderer.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Vulkan renderer
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/VulkanRenderer/Wrapper.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Vulkan renderer
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

include/Nazara/Widgets.hpp

@@ -3,7 +3,7 @@
 /*
 	Nazara Engine - Widgets module
 
-	Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+	Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
 
 	Permission is hereby granted, free of charge, to any person obtaining a copy of
 	this software and associated documentation files (the "Software"), to deal in

src/Nazara/Core/AppEntitySystemComponent.cpp

@@ -9,6 +9,7 @@ namespace Nz
 {
 	void AppEntitySystemComponent::Update(Time elapsedTime)
 	{
-		m_systemGraph.Update(elapsedTime);
+		for (auto& worldPtr : m_worlds)
+			worldPtr->Update(elapsedTime);
 	}
 }

src/Nazara/Core/EntityWorld.cpp

@@ -0,0 +1,11 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/EntityWorld.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	EntityWorld::~EntityWorld() = default;
+}

src/Nazara/Core/EnttSystemGraph.cpp

@@ -2,19 +2,19 @@
 // This file is part of the "Nazara Engine - Core module"
 // For conditions of distribution and use, see copyright notice in Config.hpp
 
-#include <Nazara/Core/Systems/SystemGraph.hpp>
+#include <Nazara/Core/EnttSystemGraph.hpp>
 #include <Nazara/Core/Debug.hpp>
 
 namespace Nz
 {
-	SystemGraph::NodeBase::~NodeBase() = default;
+	EnttSystemGraph::NodeBase::~NodeBase() = default;
 
-	void SystemGraph::Update()
+	void EnttSystemGraph::Update()
 	{
 		return Update(m_clock.Restart());
 	}
 
-	void SystemGraph::Update(Time elapsedTime)
+	void EnttSystemGraph::Update(Time elapsedTime)
 	{
 		if (!m_systemOrderUpdated)
 		{

src/Nazara/Core/EnttWorld.cpp

@@ -0,0 +1,14 @@
+// Copyright (C) 2023 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Core/EnttWorld.hpp>
+#include <Nazara/Core/Debug.hpp>
+
+namespace Nz
+{
+	void EnttWorld::Update(Time elapsedTime)
+	{
+		m_systemGraph.Update(elapsedTime);
+	}
+}

xmake.lua

@@ -170,7 +170,7 @@ option("unitybuild", { description = "Build the engine using unity build", defau
 set_project("NazaraEngine")
 set_xmakever("2.7.3")
 
-add_requires("chipmunk2d", "dr_wav", "efsw", "entt 3.10.1", "fmt", "frozen", "kiwisolver", "libflac", "libsdl", "minimp3", "ordered_map", "stb")
+add_requires("chipmunk2d", "dr_wav", "efsw", "entt v3.11.1", "fmt", "frozen", "kiwisolver", "libflac", "libsdl", "minimp3", "ordered_map", "stb")
 add_requires("freetype", { configs = { bzip2 = true, png = true, woff2 = true, zlib = true, debug = is_mode("debug") } })
 add_requires("libvorbis", { configs = { with_vorbisenc = false } })
 add_requires("openal-soft", { configs = { shared = true }})

xmake/actions/generateheaders.lua

@@ -11,11 +11,11 @@ on_run(function ()
 	local paths = {}
 
 	local excludedFiles = {
-		["Components.hpp"] = true,
+		["Components.hpp"] = { Define = "NAZARA_ENTT" },
 		["ConfigCheck.hpp"] = true,
 		["Debug.hpp"] = true,
 		["DebugOff.hpp"] = true,
-		["Systems.hpp"] = true,
+		["Systems.hpp"] = { Define = "NAZARA_ENTT" },
 		["ThreadSafety.hpp"] = true,
 		["ThreadSafetyOff.hpp"] = true
 	}
@@ -73,7 +73,9 @@ on_run(function ()
 	end
 
 	paths["Audio"].Excludes["OpenALFunctions.hpp"] = true
-	paths["Core"].Excludes["AppEntitySystemComponent.hpp"] = true
+	paths["Core"].Excludes["AppEntitySystemComponent.hpp"] = { Define = "NAZARA_ENTT" }
+	paths["Core"].Excludes["EnttSystemGraph.hpp"] = { Define = "NAZARA_ENTT" }
+	paths["Core"].Excludes["EnttWorld.hpp"] = { Define = "NAZARA_ENTT" }
 	paths["OpenGLRenderer"].Excludes["Wrapper.hpp"] = true
 	paths["VulkanRenderer"].Excludes["Wrapper.hpp"] = true
 
@@ -127,6 +129,8 @@ on_run(function ()
 		header:write("#ifndef " .. v.HeaderGuard .. "\n")
 		header:write("#define " .. v.HeaderGuard .. "\n\n")
 
+		local gatedIncludes = {}
+
 		local count = 0
 		for _, filePath in pairs(files) do
 			local pathParts = path.split(filePath)
@@ -136,13 +140,31 @@ on_run(function ()
 
 			local include = table.concat(pathParts, "/")
 			local fileName = path.filename(filePath)
-			if (not v.Excludes[fileName]) then
+
+			local exclusion = v.Excludes[fileName]
+			if (not exclusion) then
 				header:write("#include <" .. include .. ">\n")
 				count = count + 1
+			elseif (type(exclusion) == "table" and exclusion.Define) then
+				local gatedFiles = gatedIncludes[exclusion.Define]
+				if not gatedFiles then
+					gatedFiles = {}
+					gatedIncludes[exclusion.Define] = gatedFiles
+				end
+				table.insert(gatedFiles, include)
 			end
 		end
+		header:write("\n")
 
-		header:write("\n#endif // " .. v.HeaderGuard .. "\n")
+		for _, gatedDefine in ipairs(table.orderkeys(gatedIncludes)) do
+			header:write("#ifdef " .. gatedDefine .. "\n\n")
+			for _, include in ipairs(gatedIncludes[gatedDefine]) do
+				header:write("#include <" .. include .. ">\n")
+			end
+			header:write("\n#endif\n\n")
+		end
+
+		header:write("#endif // " .. v.HeaderGuard .. "\n")
 		header:close()
 		
 		print(string.format("-#include count: %d", count))