cleaned up FractureDemo, still need to apply the velocity/impulses after the fracture took place

Demos/FractureDemo/btFractureDynamicsWorld.h

@@ -0,0 +1,48 @@
+#ifndef _BT_FRACTURE_DYNAMICS_WORLD_H
+#define _BT_FRACTURE_DYNAMICS_WORLD_H
+
+#include "BulletDynamics/Dynamics/btDiscreteDynamicsWorld.h"
+#include "LinearMath/btAlignedObjectArray.h"
+
+class btFractureBody;
+class btCompoundShape;
+class btTransform;
+
+
+///The btFractureDynamicsWorld class enabled basic glue and fracture of objects. 
+///If/once this implementation is stablized/tested we might merge it into btDiscreteDynamicsWorld and remove the class.
+class btFractureDynamicsWorld : public btDiscreteDynamicsWorld
+{
+	btAlignedObjectArray<btFractureBody*> m_fractureBodies;
+
+	bool	m_fracturingMode;
+
+	void glueCallback(btScalar timeStep);
+	
+	void fractureCallback( btScalar timeStep);
+
+	void addNewBody(const btTransform& oldTransform,btScalar* masses, btCompoundShape* oldCompound);
+
+	void	breakDisconnectedParts( btFractureBody* fracObj);
+
+public:
+
+	btFractureDynamicsWorld ( btDispatcher* dispatcher,btBroadphaseInterface* pairCache,btConstraintSolver* constraintSolver,btCollisionConfiguration* collisionConfiguration);
+
+	virtual void	addRigidBody(btRigidBody* body);
+
+	virtual void	removeRigidBody(btRigidBody* body);
+
+	void	solveConstraints(btContactSolverInfo& solverInfo);
+
+	///either fracture or glue (!fracture)
+	void	setFractureMode(bool fracture)
+	{
+		m_fracturingMode = fracture;
+	}
+
+	bool getFractureMode() const { return m_fracturingMode;}
+};
+
+#endif //_BT_FRACTURE_DYNAMICS_WORLD_H
+