Constraint 2D (#147)

* Rename all Constraint by [name]Constraint3D

* Create Refs and Libraries for Constraint2D

* Remove ref to PhysWorld in Constraints ctors

* Update Constraint2d ctor to have RigiBodies first

* Add New static function for all constraints and fix an oopsie

* Add Contraint Library and remove all library useless aliases

* Add ConstraintComponent2D

* remove useless definition of Constraint2D library

* Fix : getting the world of the constraint before having created it

* Make the GetStaticBody function return a ref

* Remove : Useless AddJoint Fonction and Update CreateJoint function

* Update PhysicsSystem3D because GetStaticBody return now a ref

* Oops

* Having done something with the 3D and i was needing 2D

* Add ConstraintComponent as friend of Collision and PhysicsComponent

* Update all the Get[Static/Rigid]Body function so they return a pointer

* fix the bugs caused by the commit before

* update : CreateConstraint lambda for the nullptr case

* remove the useless  use of const pointer

* Update : CreateConstraint function

* Update ChangeLog.md

SDK/include/NDK/Components/CollisionComponent2D.hpp

@@ -17,6 +17,7 @@ namespace Ndk
 	class NDK_API CollisionComponent2D : public Component<CollisionComponent2D>
 	{
 		friend class PhysicsSystem2D;
+		friend class ConstraintComponent2D;
 
 		public:
 			CollisionComponent2D(Nz::Collider2DRef geom = Nz::Collider2DRef());

SDK/include/NDK/Components/ConstraintComponent2D.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#ifndef NDK_COMPONENTS_CONSTRAINTCOMPONENT2D_HPP
+#define NDK_COMPONENTS_CONSTRAINTCOMPONENT2D_HPP
+
+#include <NDK/Component.hpp>
+#include <Nazara/Physics2D/Constraint2D.hpp>
+#include <Nazara/Math/Vector3.hpp>
+#include <vector>
+#include <memory>
+
+namespace Ndk
+{
+	class NDK_API ConstraintComponent2D : public Component<ConstraintComponent2D>
+	{
+		public:
+			ConstraintComponent2D() = default;
+			ConstraintComponent2D(const ConstraintComponent2D& joint) = default;
+			ConstraintComponent2D(ConstraintComponent2D&& joint) = default;
+
+			template<typename T, typename... Args> inline Nz::ObjectRef<T> CreateConstraint(const Ndk::EntityHandle first, const Ndk::EntityHandle second, Args&&... args);
+		
+			static ComponentIndex componentIndex;
+
+		private:
+
+			std::vector<Nz::Constraint2DRef> m_constraints;
+	};
+
+}
+
+#include <NDK/Components/ConstraintComponent2D.inl>
+
+#endif// NDK_COMPONENTS_CONSTRAINTCOMPONENT2D_HPP

SDK/include/NDK/Components/ConstraintComponent2D.inl

@@ -0,0 +1,29 @@
+#include <NDK/Components/ConstraintComponent2D.hpp>
+#include <NDK/Components/PhysicsComponent2D.hpp>
+#include <NDK/Components/CollisionComponent2D.hpp>
+
+namespace Ndk
+{
+	template<typename T, typename ...Args>
+	inline Nz::ObjectRef<T> ConstraintComponent2D::CreateConstraint(const Ndk::EntityHandle first, const Ndk::EntityHandle second, Args && ...args)
+	{
+		auto QueryBody = [](const Ndk::EntityHandle& entity) -> Nz::RigidBody2D*
+		{
+			if (entity->HasComponent<Ndk::PhysicsComponent2D>())
+				return entity->GetComponent<Ndk::PhysicsComponent2D>().GetRigidBody();
+			else if (entity->HasComponent<Ndk::CollisionComponent2D>())
+				return entity->GetComponent<Ndk::CollisionComponent2D>().GetStaticBody();
+			return nullptr;
+		};
+
+		Nz::RigidBody2D* body_first{ QueryBody(first) }, body_second{ QueryBody(second) };
+
+		NazaraAssert(body_first && body_second, "RigidBodies of CollisionComponent2D or PhysicsComponent2D must be valid");
+
+		Nz::ObjectRef<T> constraint = T::New(*body_first, *body_second, std::forward<Args>(args)...);
+
+		m_constraints.push_back(constraint);
+
+		return constraint;
+	}
+}

SDK/include/NDK/Components/PhysicsComponent2D.hpp

@@ -17,6 +17,7 @@ namespace Ndk
 	{
 		friend class CollisionComponent2D;
 		friend class PhysicsSystem2D;
+		friend class ConstraintComponent2D;
 
 		public:
 			PhysicsComponent2D() = default;
@@ -49,7 +50,7 @@ namespace Ndk
 			static ComponentIndex componentIndex;
 
 		private:
-			Nz::RigidBody2D& GetRigidBody();
+			Nz::RigidBody2D* GetRigidBody();
 
 			void OnAttached() override;
 			void OnComponentAttached(BaseComponent& component) override;

SDK/include/NDK/Components/PhysicsComponent2D.inl

@@ -307,8 +307,8 @@ namespace Ndk
 	* \return A reference to the physics object
 	*/
 
-	inline Nz::RigidBody2D& PhysicsComponent2D::GetRigidBody()
+	inline Nz::RigidBody2D* PhysicsComponent2D::GetRigidBody()
 	{
-		return *m_object.get();
+		return m_object.get();
 	}
 }

SDK/include/NDK/Components/PhysicsComponent3D.hpp

@@ -62,7 +62,7 @@ namespace Ndk
 		private:
 			void ApplyPhysicsState(Nz::RigidBody3D& rigidBody) const;
 			void CopyPhysicsState(const Nz::RigidBody3D& rigidBody);
-			Nz::RigidBody3D& GetRigidBody();
+			Nz::RigidBody3D* GetRigidBody();
 			const Nz::RigidBody3D& GetRigidBody() const;
 
 			void OnAttached() override;

SDK/include/NDK/Components/PhysicsComponent3D.inl

@@ -461,9 +461,9 @@ namespace Ndk
 	* \brief Gets the underlying physics object
 	* \return A reference to the physics object
 	*/
-	inline Nz::RigidBody3D& PhysicsComponent3D::GetRigidBody()
+	inline Nz::RigidBody3D* PhysicsComponent3D::GetRigidBody()
 	{
-		return *m_object.get();
+		return m_object.get();
 	}
 
 	/*!