/*

* Copyright (c) 2006-2007 Erin Catto http://www.gphysics.com

*

* This software is provided 'as-is', without any express or implied

* warranty.  In no event will the authors be held liable for any damages

* arising from the use of this software.

* Permission is granted to anyone to use this software for any purpose,

* including commercial applications, and to alter it and redistribute it

* freely, subject to the following restrictions:

* 1. The origin of this software must not be misrepresented; you must not

* claim that you wrote the original software. If you use this software

* in a product, an acknowledgment in the product documentation would be

* appreciated but is not required.

* 2. Altered source versions must be plainly marked as such, and must not be

* misrepresented as being the original software.

* 3. This notice may not be removed or altered from any source distribution.

*/



#include <Box2D/Dynamics/Joints/b2Joint.h>

#include <Box2D/Dynamics/Joints/b2DistanceJoint.h>

#include <Box2D/Dynamics/Joints/b2LineJoint.h>

#include <Box2D/Dynamics/Joints/b2MouseJoint.h>

#include <Box2D/Dynamics/Joints/b2RevoluteJoint.h>

#include <Box2D/Dynamics/Joints/b2PrismaticJoint.h>

#include <Box2D/Dynamics/Joints/b2PulleyJoint.h>

#include <Box2D/Dynamics/Joints/b2GearJoint.h>

#include <Box2D/Dynamics/Joints/b2WeldJoint.h>

#include <Box2D/Dynamics/Joints/b2FrictionJoint.h>

#include <Box2D/Dynamics/b2Body.h>

#include <Box2D/Dynamics/b2World.h>

#include <Box2D/Common/b2BlockAllocator.h>



#include <new>



b2Joint* b2Joint::Create(const b2JointDef* def, b2BlockAllocator* allocator)

{

	b2Joint* joint = NULL;



	switch (def->type)

	{

	case e_distanceJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2DistanceJoint));

			joint = new (mem) b2DistanceJoint((b2DistanceJointDef*)def);

		}

		break;



	case e_mouseJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2MouseJoint));

			joint = new (mem) b2MouseJoint((b2MouseJointDef*)def);

		}

		break;



	case e_prismaticJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2PrismaticJoint));

			joint = new (mem) b2PrismaticJoint((b2PrismaticJointDef*)def);

		}

		break;



	case e_revoluteJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2RevoluteJoint));

			joint = new (mem) b2RevoluteJoint((b2RevoluteJointDef*)def);

		}

		break;



	case e_pulleyJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2PulleyJoint));

			joint = new (mem) b2PulleyJoint((b2PulleyJointDef*)def);

		}

		break;



	case e_gearJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2GearJoint));

			joint = new (mem) b2GearJoint((b2GearJointDef*)def);

		}

		break;



	case e_lineJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2LineJoint));

			joint = new (mem) b2LineJoint((b2LineJointDef*)def);

		}

		break;



	case e_weldJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2WeldJoint));

			joint = new (mem) b2WeldJoint((b2WeldJointDef*)def);

		}

		break;

        

	case e_frictionJoint:

		{

			void* mem = allocator->Allocate(sizeof(b2FrictionJoint));

			joint = new (mem) b2FrictionJoint((b2FrictionJointDef*)def);

		}

		break;



	default:

		b2Assert(false);

		break;

	}



	return joint;

}



void b2Joint::Destroy(b2Joint* joint, b2BlockAllocator* allocator)

{

	joint->~b2Joint();

	switch (joint->m_type)

	{

	case e_distanceJoint:

		allocator->Free(joint, sizeof(b2DistanceJoint));

		break;



	case e_mouseJoint:

		allocator->Free(joint, sizeof(b2MouseJoint));

		break;



	case e_prismaticJoint:

		allocator->Free(joint, sizeof(b2PrismaticJoint));

		break;



	case e_revoluteJoint:

		allocator->Free(joint, sizeof(b2RevoluteJoint));

		break;



	case e_pulleyJoint:

		allocator->Free(joint, sizeof(b2PulleyJoint));

		break;



	case e_gearJoint:

		allocator->Free(joint, sizeof(b2GearJoint));

		break;



	case e_lineJoint:

		allocator->Free(joint, sizeof(b2LineJoint));

		break;

    

	case e_weldJoint:

		allocator->Free(joint, sizeof(b2WeldJoint));

		break;



	case e_frictionJoint:

		allocator->Free(joint, sizeof(b2FrictionJoint));

		break;



	default:

		b2Assert(false);

		break;

	}

}



b2Joint::b2Joint(const b2JointDef* def)

{

	b2Assert(def->bodyA != def->bodyB);



	m_type = def->type;

	m_prev = NULL;

	m_next = NULL;

	m_bodyA = def->bodyA;

	m_bodyB = def->bodyB;

	m_collideConnected = def->collideConnected;

	m_islandFlag = false;

	m_userData = def->userData;



	m_edgeA.joint = NULL;

	m_edgeA.other = NULL;

	m_edgeA.prev = NULL;

	m_edgeA.next = NULL;



	m_edgeB.joint = NULL;

	m_edgeB.other = NULL;

	m_edgeB.prev = NULL;

	m_edgeB.next = NULL;

}



bool b2Joint::IsActive() const

{

	return m_bodyA->IsActive() && m_bodyB->IsActive();

}