Add initial ECS support

src/Nazara/Physics3D/Components/RigidBody3DComponent.cpp

@@ -0,0 +1,10 @@
+// Copyright (C) 2021 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Physics 3D module"
+// For conditions of distribution and use, see copyright notice in Prerequisites.hpp
+
+#include <Nazara/Physics3D/Components/RigidBody3DComponent.hpp>
+#include <Nazara/Physics3D/Debug.hpp>
+
+namespace Nz
+{
+}

src/Nazara/Physics3D/Systems/Physics3DSystem.cpp

@@ -0,0 +1,45 @@
+// Copyright (C) 2021 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Utility module"
+// For conditions of distribution and use, see copyright notice in Prerequisites.hpp
+
+#include <Nazara/Physics3D/Systems/Physics3DSystem.hpp>
+#include <Nazara/Utility/Components/NodeComponent.hpp>
+#include <Nazara/Physics3D/Debug.hpp>
+
+namespace Nz
+{
+	Physics3DSystem::Physics3DSystem(entt::registry& registry)
+	{
+		m_constructConnection = registry.on_construct<RigidBody3DComponent>().connect<OnConstruct>();
+	}
+
+	Physics3DSystem::~Physics3DSystem()
+	{
+		m_constructConnection.release();
+	}
+
+	void Physics3DSystem::Update(entt::registry& registry, float elapsedTime)
+	{
+		m_physWorld.Step(elapsedTime);
+
+		// Replicate rigid body position to their node components
+		auto velView = registry.view<Nz::NodeComponent, const RigidBody3DComponent>();
+		for (auto [entity, nodeComponent, rigidBodyComponent] : velView.each())
+		{
+			nodeComponent.SetPosition(rigidBodyComponent.GetPosition(), CoordSys::Global);
+			nodeComponent.SetRotation(rigidBodyComponent.GetRotation(), CoordSys::Global);
+		}
+	}
+
+	void Physics3DSystem::OnConstruct(entt::registry& registry, entt::entity entity)
+	{
+		// If our entity already has a node component when adding a rigid body, initialize it with
+		Nz::NodeComponent* node = registry.try_get<NodeComponent>(entity);
+		if (node)
+		{
+			RigidBody3DComponent& rigidBody = registry.get<RigidBody3DComponent>(entity);
+			rigidBody.SetPosition(node->GetPosition());
+			rigidBody.SetRotation(node->GetRotation());
+		}
+	}
+}