Ndk/Physics: Added first physics components/systems

Former-commit-id: 654b7a2a4645487d139474dcbd02c0882d7c8f02

SDK/src/NDK/Systems/PhysicsSystem.cpp

@@ -0,0 +1,40 @@
+// Copyright (C) 2015 Jérôme Leclercq
+// This file is part of the "Nazara Development Kit"
+// For conditions of distribution and use, see copyright notice in Prerequesites.hpp
+
+#include <NDK/Systems/PhysicsSystem.hpp>
+#include <Nazara/Physics/PhysObject.hpp>
+#include <NDK/Components/CollisionComponent.hpp>
+#include <NDK/Components/NodeComponent.hpp>
+#include <NDK/Components/PhysicsComponent.hpp>
+
+namespace Ndk
+{
+	PhysicsSystem::PhysicsSystem()
+	{
+		Requires<NodeComponent, PhysicsComponent>();
+	}
+
+	PhysicsSystem::PhysicsSystem(const PhysicsSystem& system) :
+	System(system),
+	m_world()
+	{
+	}
+
+	void PhysicsSystem::Update(float elapsedTime)
+	{
+		m_world.Step(elapsedTime);
+
+		for (const Ndk::EntityHandle& entity : GetEntities())
+		{
+			NodeComponent& node = entity->GetComponent<NodeComponent>();
+			PhysicsComponent& phys = entity->GetComponent<PhysicsComponent>();
+
+			NzPhysObject& physObj = phys.GetPhysObject();
+			node.SetRotation(physObj.GetRotation(), nzCoordSys_Global);
+			node.SetPosition(physObj.GetPosition(), nzCoordSys_Global);
+		}
+	}
+
+	SystemIndex PhysicsSystem::systemIndex;
+}