1 files changed, 201 insertions, 0 deletions
diff --git a/Runtime/Physics2D/Joint2D.cpp b/Runtime/Physics2D/Joint2D.cpp
new file mode 100644
index 0000000..ed0de54
--- /dev/null
+++ b/Runtime/Physics2D/Joint2D.cpp
@@ -0,0 +1,201 @@
+#include "UnityPrefix.h"
+
+#if ENABLE_2D_PHYSICS || DOXYGEN
+#include "Runtime/Physics2D/Joint2D.h"
+#include "Runtime/Physics2D/RigidBody2D.h"
+#include "Runtime/Physics2D/Physics2DManager.h"
+
+#include "Runtime/Graphics/Transform.h"
+#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
+#include "Runtime/Utilities/LogAssert.h"
+#include "External/Box2D/Box2D/Box2D.h"
+
+
+IMPLEMENT_CLASS (Joint2D)
+IMPLEMENT_OBJECT_SERIALIZE (Joint2D)
+INSTANTIATE_TEMPLATE_TRANSFER (Joint2D)
+
+// --------------------------------------------------------------------------
+
+
+Joint2D::Joint2D (MemLabelId label, ObjectCreationMode mode)
+:	Super(label, mode)
+,	m_Joint(NULL)
+{
+}
+
+
+Joint2D::~Joint2D ()
+{
+	Cleanup ();
+}
+
+
+template<class TransferFunction>
+void Joint2D::Transfer (TransferFunction& transfer) 
+{
+	Super::Transfer(transfer);
+
+	TRANSFER (m_CollideConnected);
+	transfer.Align();
+	TRANSFER (m_ConnectedRigidBody);
+}
+
+
+void Joint2D::Reset ()
+{
+	Super::Reset ();
+
+	Cleanup ();
+
+	m_ConnectedRigidBody = NULL;
+	m_CollideConnected = false;
+}	
+	
+
+void Joint2D::AwakeFromLoad (AwakeFromLoadMode awakeMode)
+{
+	Super::AwakeFromLoad (awakeMode);
+
+	// Recreate joint if appropriate.
+	// Most of Box2D joint properties are immutable once created
+	// thus causing us to regenerate the joint if a property changes in the editor.
+	if ((awakeMode == kDefaultAwakeFromLoad))
+		ReCreate ();
+}
+
+
+void Joint2D::Deactivate (DeactivateOperation operation)
+{
+	Cleanup ();
+	Super::Deactivate (operation);
+}
+
+
+void Joint2D::AddToManager ()
+{
+	// Create the joint.
+	ReCreate ();
+}
+
+
+void Joint2D::RemoveFromManager ()
+{
+	// Destroy the joint.
+	Cleanup ();
+}
+
+
+void Joint2D::RecreateJoint (const Rigidbody2D* ignoreRigidbody)
+{
+	if (IsActive () && GetEnabled())
+		ReCreate ();
+	else
+		Cleanup ();
+}
+
+
+void Joint2D::SetConnectedBody (PPtr<Rigidbody2D> rigidBody)
+{
+	m_ConnectedRigidBody = rigidBody;
+	SetDirty ();
+
+	ReCreate ();
+}
+
+
+void Joint2D::SetCollideConnected (bool collide)
+{
+	m_CollideConnected = collide;
+	SetDirty ();
+
+	ReCreate ();
+}
+
+
+// --------------------------------------------------------------------------
+
+
+void Joint2D::ReCreate()
+{
+	Cleanup();
+
+	if (IsActive () && GetEnabled ())
+		Create();
+}
+
+
+void Joint2D::Cleanup ()
+{
+	// Finish if no joint to clean-up.
+	if (!m_Joint)
+		return;
+
+	// Destroy the joint.
+	GetPhysics2DWorld ()->DestroyJoint (m_Joint);
+	m_Joint = NULL;
+}
+
+
+b2Body* Joint2D::FetchBodyA () const
+{
+	// Find the rigid-body A.
+	Rigidbody2D* rigidBodyA = QueryComponent(Rigidbody2D);
+	Assert (rigidBodyA != NULL);
+
+	// Ensure the rigid-body (body) is available.
+	if ( rigidBodyA )
+		rigidBodyA->Create();
+
+	// Fetch the body A.
+	return rigidBodyA->GetBody();
+}
+
+
+b2Body* Joint2D::FetchBodyB () const
+{
+	// Find the appropriate rigid body B.
+	Rigidbody2D* rigidBodyB = m_ConnectedRigidBody;
+
+	// Ensure the rigid-body (body) is available.
+	if ( rigidBodyB )
+		rigidBodyB->Create();
+
+	// Fetch the appropriate body B.
+	return rigidBodyB != NULL ? rigidBodyB->GetBody() : GetPhysicsGroundBody();
+}
+
+
+void Joint2D::FinalizeCreateJoint (b2JointDef* jointDef)
+{
+	Assert (jointDef != NULL);
+
+	if (!IsActive ())
+		return;
+
+	// Fetch the appropriate body A.
+	b2Body* bodyA = FetchBodyA();
+
+	// Fetch the appropriate body B.
+	b2Body* bodyB = FetchBodyB();
+
+	// Finish if the same body is being used.
+	if ( bodyA == bodyB )
+	{
+		WarningStringObject(Format("Cannot create 2D joint on '%s' as it connects to itself.\n",	
+			 GetGameObjectPtr()->GetName()), this);
+		return;
+	}
+
+	// Populate the basic joint definition information.
+	jointDef->bodyA = bodyA;
+	jointDef->bodyB = bodyB;
+	jointDef->collideConnected = m_CollideConnected;
+	jointDef->userData = this;
+
+	// Create the joint.
+	m_Joint = GetPhysics2DWorld ()->CreateJoint (jointDef);
+}
+
+
+#endif //ENABLE_2D_PHYSICS