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diff --git a/extern/bullet2/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h b/extern/bullet2/BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h
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+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2009 Erwin Coumans  http://bulletphysics.org
+
+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.
+*/
+
+
+#ifndef BT_DISCRETE_DYNAMICS_WORLD_H
+#define BT_DISCRETE_DYNAMICS_WORLD_H
+
+#include "btDynamicsWorld.h"
+
+class btDispatcher;
+class btOverlappingPairCache;
+class btConstraintSolver;
+class btSimulationIslandManager;
+class btTypedConstraint;
+class btActionInterface;
+
+class btIDebugDraw;
+#include "LinearMath/btAlignedObjectArray.h"
+
+
+///btDiscreteDynamicsWorld provides discrete rigid body simulation
+///those classes replace the obsolete CcdPhysicsEnvironment/CcdPhysicsController
+class btDiscreteDynamicsWorld : public btDynamicsWorld
+{
+protected:
+
+	btConstraintSolver*	m_constraintSolver;
+
+	btSimulationIslandManager*	m_islandManager;
+
+	btAlignedObjectArray<btTypedConstraint*> m_constraints;
+
+	btAlignedObjectArray<btRigidBody*> m_nonStaticRigidBodies;
+
+	btVector3	m_gravity;
+
+	//for variable timesteps
+	btScalar	m_localTime;
+	//for variable timesteps
+
+	bool	m_ownsIslandManager;
+	bool	m_ownsConstraintSolver;
+	bool	m_synchronizeAllMotionStates;
+
+	btAlignedObjectArray<btActionInterface*>	m_actions;
+	
+	int	m_profileTimings;
+
+	virtual void	predictUnconstraintMotion(btScalar timeStep);
+	
+	virtual void	integrateTransforms(btScalar timeStep);
+		
+	virtual void	calculateSimulationIslands();
+
+	virtual void	solveConstraints(btContactSolverInfo& solverInfo);
+	
+	void	updateActivationState(btScalar timeStep);
+
+	void	updateActions(btScalar timeStep);
+
+	void	startProfiling(btScalar timeStep);
+
+	virtual void	internalSingleStepSimulation( btScalar timeStep);
+
+
+	virtual void	saveKinematicState(btScalar timeStep);
+
+	void	serializeRigidBodies(btSerializer* serializer);
+
+public:
+
+
+	///this btDiscreteDynamicsWorld constructor gets created objects from the user, and will not delete those
+	btDiscreteDynamicsWorld(btDispatcher* dispatcher,btBroadphaseInterface* pairCache,btConstraintSolver* constraintSolver,btCollisionConfiguration* collisionConfiguration);
+
+	virtual ~btDiscreteDynamicsWorld();
+
+	///if maxSubSteps > 0, it will interpolate motion between fixedTimeStep's
+	virtual int	stepSimulation( btScalar timeStep,int maxSubSteps=1, btScalar fixedTimeStep=btScalar(1.)/btScalar(60.));
+
+
+	virtual void	synchronizeMotionStates();
+
+	///this can be useful to synchronize a single rigid body -> graphics object
+	void	synchronizeSingleMotionState(btRigidBody* body);
+
+	virtual void	addConstraint(btTypedConstraint* constraint, bool disableCollisionsBetweenLinkedBodies=false);
+
+	virtual void	removeConstraint(btTypedConstraint* constraint);
+
+	virtual void	addAction(btActionInterface*);
+
+	virtual void	removeAction(btActionInterface*);
+	
+	btSimulationIslandManager*	getSimulationIslandManager()
+	{
+		return m_islandManager;
+	}
+
+	const btSimulationIslandManager*	getSimulationIslandManager() const 
+	{
+		return m_islandManager;
+	}
+
+	btCollisionWorld*	getCollisionWorld()
+	{
+		return this;
+	}
+
+	virtual void	setGravity(const btVector3& gravity);
+
+	virtual btVector3 getGravity () const;
+
+	virtual void	addCollisionObject(btCollisionObject* collisionObject,short int collisionFilterGroup=btBroadphaseProxy::StaticFilter,short int collisionFilterMask=btBroadphaseProxy::AllFilter ^ btBroadphaseProxy::StaticFilter);
+
+	virtual void	addRigidBody(btRigidBody* body);
+
+	virtual void	addRigidBody(btRigidBody* body, short group, short mask);
+
+	virtual void	removeRigidBody(btRigidBody* body);
+
+	///removeCollisionObject will first check if it is a rigid body, if so call removeRigidBody otherwise call btCollisionWorld::removeCollisionObject
+	virtual void	removeCollisionObject(btCollisionObject* collisionObject);
+
+
+	void	debugDrawConstraint(btTypedConstraint* constraint);
+
+	virtual void	debugDrawWorld();
+
+	virtual void	setConstraintSolver(btConstraintSolver* solver);
+
+	virtual btConstraintSolver* getConstraintSolver();
+	
+	virtual	int		getNumConstraints() const;
+
+	virtual btTypedConstraint* getConstraint(int index)	;
+
+	virtual const btTypedConstraint* getConstraint(int index) const;
+
+	
+	virtual btDynamicsWorldType	getWorldType() const
+	{
+		return BT_DISCRETE_DYNAMICS_WORLD;
+	}
+	
+	///the forces on each rigidbody is accumulating together with gravity. clear this after each timestep.
+	virtual void	clearForces();
+
+	///apply gravity, call this once per timestep
+	virtual void	applyGravity();
+
+	virtual void	setNumTasks(int numTasks)
+	{
+        (void) numTasks;
+	}
+
+	///obsolete, use updateActions instead
+	virtual void updateVehicles(btScalar timeStep)
+	{
+		updateActions(timeStep);
+	}
+
+	///obsolete, use addAction instead
+	virtual void	addVehicle(btActionInterface* vehicle);
+	///obsolete, use removeAction instead
+	virtual void	removeVehicle(btActionInterface* vehicle);
+	///obsolete, use addAction instead
+	virtual void	addCharacter(btActionInterface* character);
+	///obsolete, use removeAction instead
+	virtual void	removeCharacter(btActionInterface* character);
+
+	void	setSynchronizeAllMotionStates(bool synchronizeAll)
+	{
+		m_synchronizeAllMotionStates = synchronizeAll;
+	}
+	bool getSynchronizeAllMotionStates() const
+	{
+		return m_synchronizeAllMotionStates;
+	}
+
+	///Preliminary serialization test for Bullet 2.76. Loading those files requires a separate parser (see Bullet/Demos/SerializeDemo)
+	virtual	void	serialize(btSerializer* serializer);
+
+};
+
+#endif //BT_DISCRETE_DYNAMICS_WORLD_H