bullet3/examples/SharedMemory/PhysicsServer.cpp

#include "PhysicsServer.h"
#include "PosixSharedMemory.h"
#include "Win32SharedMemory.h"

#include "../Importers/ImportURDFDemo/BulletUrdfImporter.h"
#include "../Importers/ImportURDFDemo/MyMultiBodyCreator.h"
#include "../Importers/ImportURDFDemo/URDF2Bullet.h"
#include "BulletDynamics/Featherstone/btMultiBodyDynamicsWorld.h"
#include "BulletDynamics/Featherstone/btMultiBodyConstraintSolver.h"
#include "BulletDynamics/Featherstone/btMultiBodyPoint2Point.h"
#include "BulletDynamics/Featherstone/btMultiBodyLinkCollider.h"

#include "btBulletDynamicsCommon.h"

#include "../Extras/Serialize/BulletWorldImporter/btBulletWorldImporter.h"
#include "BulletDynamics/Featherstone/btMultiBodyJointMotor.h"
#include "LinearMath/btSerializer.h"
#include "Bullet3Common/b3Logging.h"
#include "../CommonInterfaces/CommonGUIHelperInterface.h"

struct UrdfLinkNameMapUtil
{
	btMultiBody* m_mb;
	btDefaultSerializer* m_memSerializer;

	UrdfLinkNameMapUtil():m_mb(0),m_memSerializer(0)
	{
	}
};

struct PhysicsServerInternalData
{
	SharedMemoryInterface* m_sharedMemory;
    SharedMemoryExampleData* m_testBlock1;
	bool m_isConnected;

	//btAlignedObjectArray<btJointFeedback*> m_jointFeedbacks;

	btAlignedObjectArray<btBulletWorldImporter*> m_worldImporters;
	btAlignedObjectArray<UrdfLinkNameMapUtil*> m_urdfLinkNameMapper;
	btHashMap<btHashInt, btMultiBodyJointMotor*>	m_multiBodyJointMotorMap;
	btAlignedObjectArray<std::string*> m_strings;

	btMultiBodyDynamicsWorld* m_dynamicsWorld;
	struct GUIHelperInterface* m_guiHelper;
	

	PhysicsServerInternalData()
		:m_sharedMemory(0),
		m_testBlock1(0),
		m_isConnected(false),
		m_dynamicsWorld(0),
		m_guiHelper(0)
	{
	}
};


PhysicsServerSharedMemory::PhysicsServerSharedMemory()
{
	m_data = new PhysicsServerInternalData();

#ifdef _WIN32
	m_data->m_sharedMemory = new Win32SharedMemoryServer();
#else
	m_data->m_sharedMemory = new PosixSharedMemory();
#endif


}

PhysicsServerSharedMemory::~PhysicsServerSharedMemory()
{
	delete m_data;
}



bool PhysicsServerSharedMemory::connectSharedMemory(bool allowSharedMemoryInitialization, class btMultiBodyDynamicsWorld* dynamicsWorld, struct GUIHelperInterface* guiHelper)
{
	m_data->m_dynamicsWorld = dynamicsWorld;
	m_data->m_guiHelper = guiHelper;
	
	bool allowCreation = true;

	m_data->m_testBlock1 = (SharedMemoryExampleData*)m_data->m_sharedMemory->allocateSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE,allowCreation);
    if (m_data->m_testBlock1)
    {
        if (m_data->m_testBlock1->m_magicId !=SHARED_MEMORY_MAGIC_NUMBER)
        {
			if (allowSharedMemoryInitialization)
			{
				InitSharedMemoryExampleData(m_data->m_testBlock1);
				b3Printf("Created and initialized shared memory block");
				m_data->m_isConnected = true;
			} else
			{
				b3Error("Error: please start server before client\n");
				m_data->m_sharedMemory->releaseSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE);
				m_data->m_testBlock1 = 0;
				return false;
			}
        } else
		{
			b3Printf("Connected to existing shared memory, status OK.\n");
			m_data->m_isConnected = true;
		}
    } else
	{
		b3Error("Cannot connect to shared memory");
		return false;
	}
	return true;
}


void PhysicsServerSharedMemory::disconnectSharedMemory(bool deInitializeSharedMemory)
{
	b3Printf("releaseSharedMemory1\n");
	if (m_data->m_testBlock1)
	{
		b3Printf("m_testBlock1\n");
		if (deInitializeSharedMemory)
		{
			m_data->m_testBlock1->m_magicId = 0;
			b3Printf("De-initialized shared memory, magic id = %d\n",m_data->m_testBlock1->m_magicId);
		}
		btAssert(m_data->m_sharedMemory);
		m_data->m_sharedMemory->releaseSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE);
	}
	if (m_data->m_sharedMemory)
	{
		b3Printf("m_sharedMemory\n");
		delete m_data->m_sharedMemory;
		m_data->m_sharedMemory = 0;
		m_data->m_testBlock1 = 0;
	}
}

void PhysicsServerSharedMemory::releaseSharedMemory()
{
	b3Printf("releaseSharedMemory1\n");
    if (m_data->m_testBlock1)
    {
		b3Printf("m_testBlock1\n");
        m_data->m_testBlock1->m_magicId = 0;
        b3Printf("magic id = %d\n",m_data->m_testBlock1->m_magicId);
        btAssert(m_data->m_sharedMemory);
        m_data->m_sharedMemory->releaseSharedMemory(SHARED_MEMORY_KEY, SHARED_MEMORY_SIZE);
    }
    if (m_data->m_sharedMemory)
    {
		b3Printf("m_sharedMemory\n");
        delete m_data->m_sharedMemory;
        m_data->m_sharedMemory = 0;
        m_data->m_testBlock1 = 0;
    }
}


bool PhysicsServerSharedMemory::supportsJointMotor(btMultiBody* mb, int mbLinkIndex)
{
	bool canHaveMotor = (mb->getLink(mbLinkIndex).m_jointType==btMultibodyLink::eRevolute
			||mb->getLink(mbLinkIndex).m_jointType==btMultibodyLink::ePrismatic);
	return canHaveMotor;

}

//for testing, create joint motors for revolute and prismatic joints
void	PhysicsServerSharedMemory::createJointMotors(btMultiBody* mb)
{
	int numLinks = mb->getNumLinks();
	for (int i=0;i<numLinks;i++)
	{
		int mbLinkIndex = i;
							
		if (supportsJointMotor(mb,mbLinkIndex))
		{
			float maxMotorImpulse = 0.f;
			int dof = 0;
			btScalar desiredVelocity = 0.f;
			btMultiBodyJointMotor* motor = new btMultiBodyJointMotor(mb,mbLinkIndex,dof,desiredVelocity,maxMotorImpulse);
			//motor->setMaxAppliedImpulse(0);
			m_data->m_multiBodyJointMotorMap.insert(mbLinkIndex,motor);
			m_data->m_dynamicsWorld->addMultiBodyConstraint(motor);
		}

	}
}



bool PhysicsServerSharedMemory::loadUrdf(const char* fileName, const btVector3& pos, const btQuaternion& orn,
                             bool useMultiBody, bool useFixedBase)
{
	btAssert(m_data->m_dynamicsWorld);
	if (!m_data->m_dynamicsWorld)
	{
		b3Error("loadUrdf: No valid m_dynamicsWorld");
		return false;
	}

    BulletURDFImporter u2b(m_data->m_guiHelper);

    bool loadOk =  u2b.loadURDF(fileName, useFixedBase);
    if (loadOk)
    {
        b3Printf("loaded %s OK!", fileName);
        
        btTransform tr;
        tr.setIdentity();
        tr.setOrigin(pos);
        tr.setRotation(orn);
        int rootLinkIndex = u2b.getRootLinkIndex();
        //                      printf("urdf root link index = %d\n",rootLinkIndex);
		MyMultiBodyCreator creation(m_data->m_guiHelper);
        
        ConvertURDF2Bullet(u2b,creation, tr,m_data->m_dynamicsWorld,useMultiBody,u2b.getPathPrefix());
        btMultiBody* mb = creation.getBulletMultiBody();
		if (useMultiBody)
		{
			if (mb)
			{
				createJointMotors(mb);

				//serialize the btMultiBody and send the data to the client. This is one way to get the link/joint names across the (shared memory) wire
			    UrdfLinkNameMapUtil* util = new UrdfLinkNameMapUtil;
			    m_data->m_urdfLinkNameMapper.push_back(util);
			    util->m_mb = mb;
			    util->m_memSerializer = new btDefaultSerializer(SHARED_MEMORY_MAX_STREAM_CHUNK_SIZE,(unsigned char*)m_data->m_testBlock1->m_bulletStreamDataServerToClient);
			    //disable serialization of the collision objects (they are too big, and the client likely doesn't need them);
				util->m_memSerializer->m_skipPointers.insert(mb->getBaseCollider(),0);

			    for (int i=0;i<mb->getNumLinks();i++)
                {
					//disable serialization of the collision objects
                   util->m_memSerializer->m_skipPointers.insert(mb->getLink(i).m_collider,0);
				   int urdfLinkIndex = creation.m_mb2urdfLink[i];
				   std::string* linkName = new std::string(u2b.getLinkName(urdfLinkIndex).c_str());
				   m_data->m_strings.push_back(linkName);
				   util->m_memSerializer->registerNameForPointer(linkName->c_str(),linkName->c_str());
				   mb->getLink(i).m_linkName = linkName->c_str();

				   std::string* jointName = new std::string(u2b.getJointName(urdfLinkIndex).c_str());
				   m_data->m_strings.push_back(jointName);
				   util->m_memSerializer->registerNameForPointer(jointName->c_str(),jointName->c_str());
				   mb->getLink(i).m_jointName = jointName->c_str();
                }
				
				std::string* baseName = new std::string(u2b.getLinkName(u2b.getRootLinkIndex()));
				m_data->m_strings.push_back(baseName);

				
				util->m_memSerializer->registerNameForPointer(baseName->c_str(),baseName->c_str());
				mb->setBaseName(baseName->c_str());
				
				
                util->m_memSerializer->insertHeader();
                
                int len = mb->calculateSerializeBufferSize();
                btChunk* chunk = util->m_memSerializer->allocate(len,1);
                const char* structType = mb->serialize(chunk->m_oldPtr, util->m_memSerializer);
                util->m_memSerializer->finalizeChunk(chunk,structType,BT_MULTIBODY_CODE,mb);
                
				return true;
			} else
			{
				b3Warning("No multibody loaded from URDF. Could add btRigidBody+btTypedConstraint solution later.");
				return false;
			}
		} else
		{
			btAssert(0);
			/*
			for (int i=0;i<m_data->m_dynamicsWorld->getNumConstraints();i++)
			{
				btTypedConstraint* c = m_data->m_dynamicsWorld->getConstraint(i);
				btJointFeedback* fb = new btJointFeedback();
				m_data->m_jointFeedbacks.push_back(fb);
				c->setJointFeedback(fb);

			}
			*/
			return true;
		}
        
    }
    
    return false;
}


void PhysicsServerSharedMemory::processClientCommands()
{
	if (m_data->m_isConnected && m_data->m_testBlock1)
    {
        ///we ignore overflow of integer for now
        if (m_data->m_testBlock1->m_numClientCommands> m_data->m_testBlock1->m_numProcessedClientCommands)
        {
            
            //until we implement a proper ring buffer, we assume always maximum of 1 outstanding commands
            btAssert(m_data->m_testBlock1->m_numClientCommands==m_data->m_testBlock1->m_numProcessedClientCommands+1);
            
			const SharedMemoryCommand& clientCmd =m_data->m_testBlock1->m_clientCommands[0];
			m_data->m_testBlock1->m_numProcessedClientCommands++;
            
            //consume the command
			switch (clientCmd.m_type)
            {
				case CMD_SEND_BULLET_DATA_STREAM:
                {
					b3Printf("Processed CMD_SEND_BULLET_DATA_STREAM length %d",clientCmd.m_dataStreamArguments.m_streamChunkLength);
					
					btBulletWorldImporter* worldImporter = new btBulletWorldImporter(m_data->m_dynamicsWorld);
					m_data->m_worldImporters.push_back(worldImporter);
					bool completedOk = worldImporter->loadFileFromMemory(m_data->m_testBlock1->m_bulletStreamDataClientToServer,clientCmd.m_dataStreamArguments.m_streamChunkLength);
					
					SharedMemoryCommand& serverCmd =m_data->m_testBlock1->m_serverCommands[0];
 
                    if (completedOk)
                    {
						m_data->m_guiHelper->autogenerateGraphicsObjects(this->m_data->m_dynamicsWorld);
                        serverCmd.m_type =CMD_BULLET_DATA_STREAM_RECEIVED_COMPLETED;
                    } else
                    {
                        serverCmd.m_type =CMD_BULLET_DATA_STREAM_RECEIVED_FAILED;
                    
                    }
                    m_data->m_testBlock1->m_numServerCommands++;
					break;
				}
                case CMD_LOAD_URDF:
                {
                    const UrdfArgs& urdfArgs = clientCmd.m_urdfArguments;
                    b3Printf("Processed CMD_LOAD_URDF:%s", urdfArgs.m_urdfFileName);

                    //load the actual URDF and send a report: completed or failed
                    bool completedOk = loadUrdf(urdfArgs.m_urdfFileName,
                                                btVector3(urdfArgs.m_initialPosition[0],
                                                          urdfArgs.m_initialPosition[1],
                                                          urdfArgs.m_initialPosition[2]),
                                                btQuaternion(urdfArgs.m_initialOrientation[0],
                                                             urdfArgs.m_initialOrientation[1],
                                                             urdfArgs.m_initialOrientation[2],
                                                             urdfArgs.m_initialOrientation[3]),
                                                urdfArgs.m_useMultiBody, urdfArgs.m_useFixedBase);
                    SharedMemoryCommand& serverCmd =m_data->m_testBlock1->m_serverCommands[0];
 
                    if (completedOk)
                    {
						if (m_data->m_urdfLinkNameMapper.size())
						{
							serverCmd.m_dataStreamArguments.m_streamChunkLength = m_data->m_urdfLinkNameMapper.at(m_data->m_urdfLinkNameMapper.size()-1)->m_memSerializer->getCurrentBufferSize();
						}
                        serverCmd.m_type =CMD_URDF_LOADING_COMPLETED;
                    } else
                    {
                        serverCmd.m_type =CMD_URDF_LOADING_FAILED;
                    
                    }
                    m_data->m_testBlock1->m_numServerCommands++;
                    

                    
                    break;
                }
                case CMD_SEND_DESIRED_STATE:
                    {
                        	//for (int i=0;i<MAX_DEGREE_OF_FREEDOM;i++)
                            //{
                            //    m_testBlock1->m_desiredStateForceTorque[i] = 100;
                            //}
                            
                            b3Printf("Processed CMD_SEND_DESIRED_STATE");
                            if (m_data->m_dynamicsWorld->getNumMultibodies()>0)
                            {
                                btMultiBody* mb = m_data->m_dynamicsWorld->getMultiBody(0);
                                btAssert(mb);
                                
                                switch (clientCmd.m_sendDesiredStateCommandArgument.m_controlMode)
                                {
                                case CONTROL_MODE_TORQUE:
                                    {
										b3Printf("Using CONTROL_MODE_TORQUE");
                                        mb->clearForcesAndTorques();
                                        
                                        int torqueIndex = 0;
										btVector3 f(clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[0],
                                                    clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[1],
                                                    clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[2]);
                                        btVector3 t(clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[3],
                                                    clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[4],
                                                    clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[5]);
                                        torqueIndex+=6;
                                        mb->addBaseForce(f);
                                        mb->addBaseTorque(t);
                                        for (int link=0;link<mb->getNumLinks();link++)
                                        {
                                            
                                            for (int dof=0;dof<mb->getLink(link).m_dofCount;dof++)
                                            {               
                                                double torque = clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[torqueIndex];
                                                mb->addJointTorqueMultiDof(link,dof,torque);
                                                torqueIndex++;
                                            }
                                        }
                                        break;
                                    }
								case CONTROL_MODE_VELOCITY:
									{
										int numMotors = 0;
										//find the joint motors and apply the desired velocity and maximum force/torque
										if (m_data->m_dynamicsWorld->getNumMultibodies()>0)
										{
											btMultiBody* mb = m_data->m_dynamicsWorld->getMultiBody(0);
											int dofIndex = 6;//skip the 3 linear + 3 angular degree of freedom entries of the base
											for (int link=0;link<mb->getNumLinks();link++)
											{
												if (supportsJointMotor(mb,link))
												{
													
													btMultiBodyJointMotor** motorPtr  = m_data->m_multiBodyJointMotorMap[link];
													if (motorPtr)
													{
														btMultiBodyJointMotor* motor = *motorPtr;
														btScalar desiredVelocity = clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateQdot[dofIndex];
														motor->setVelocityTarget(desiredVelocity);

														btScalar physicsDeltaTime=1./60.;//todo: set the physicsDeltaTime explicitly in the API, separate from the 'stepSimulation'

														btScalar maxImp = clientCmd.m_sendDesiredStateCommandArgument.m_desiredStateForceTorque[dofIndex]*physicsDeltaTime;
														motor->setMaxAppliedImpulse(maxImp);
														numMotors++;

													}
												}
												dofIndex += mb->getLink(link).m_dofCount;
											}
										}
										b3Printf("Using CONTROL_MODE_TORQUE with %d motors", numMotors);
										break;
									}
                                default:
                                    {
                                        b3Printf("m_controlMode not implemented yet");
                                        break;
                                    }
                                    
                                }
                            }
                            
                            
                            
                            SharedMemoryCommand& serverCmd = m_data->m_testBlock1->m_serverCommands[0];
							serverCmd.m_type = CMD_DESIRED_STATE_RECEIVED_COMPLETED;
							m_data->m_testBlock1->m_numServerCommands++;
                        break;
                    }
				case CMD_REQUEST_ACTUAL_STATE:
					{
	                    b3Printf("Sending the actual state (Q,U)");
						if (m_data->m_dynamicsWorld->getNumMultibodies()>0)
						{
							btMultiBody* mb = m_data->m_dynamicsWorld->getMultiBody(0);
							SharedMemoryCommand& serverCmd = m_data->m_testBlock1->m_serverCommands[0];
							serverCmd.m_type = CMD_ACTUAL_STATE_UPDATE_COMPLETED;

							serverCmd.m_sendActualStateArgs.m_bodyUniqueId = 0;
							int totalDegreeOfFreedomQ = 0;
							int totalDegreeOfFreedomU = 0; 
							
							//always add the base, even for static (non-moving objects)
							//so that we can easily move the 'fixed' base when needed
							//do we don't use this conditional "if (!mb->hasFixedBase())"
							{
								btTransform tr;
								tr.setOrigin(mb->getBasePos());
								tr.setRotation(mb->getWorldToBaseRot().inverse());
								
								//base position in world space, carthesian
								serverCmd.m_sendActualStateArgs.m_actualStateQ[0] = tr.getOrigin()[0];
								serverCmd.m_sendActualStateArgs.m_actualStateQ[1] = tr.getOrigin()[1];
								serverCmd.m_sendActualStateArgs.m_actualStateQ[2] = tr.getOrigin()[2];

								//base orientation, quaternion x,y,z,w, in world space, carthesian
								serverCmd.m_sendActualStateArgs.m_actualStateQ[3] = tr.getRotation()[0]; 
								serverCmd.m_sendActualStateArgs.m_actualStateQ[4] = tr.getRotation()[1];
								serverCmd.m_sendActualStateArgs.m_actualStateQ[5] = tr.getRotation()[2];
								serverCmd.m_sendActualStateArgs.m_actualStateQ[6] = tr.getRotation()[3];
								totalDegreeOfFreedomQ +=7;//pos + quaternion

								//base linear velocity (in world space, carthesian)
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[0] = mb->getBaseVel()[0];
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[1] = mb->getBaseVel()[1];
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[2] = mb->getBaseVel()[2];
	
								//base angular velocity (in world space, carthesian)
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[3] = mb->getBaseOmega()[0];
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[4] = mb->getBaseOmega()[1];
								serverCmd.m_sendActualStateArgs.m_actualStateQdot[5] = mb->getBaseOmega()[2];
								totalDegreeOfFreedomU += 6;//3 linear and 3 angular DOF
							}
							for (int l=0;l<mb->getNumLinks();l++)
							{
								for (int d=0;d<mb->getLink(l).m_posVarCount;d++)
								{
									serverCmd.m_sendActualStateArgs.m_actualStateQ[totalDegreeOfFreedomQ++] = mb->getJointPosMultiDof(l)[d];
								}
								for (int d=0;d<mb->getLink(l).m_dofCount;d++)
								{
									serverCmd.m_sendActualStateArgs.m_actualStateQdot[totalDegreeOfFreedomU++] = mb->getJointVelMultiDof(l)[d];
								}

							}

							serverCmd.m_sendActualStateArgs.m_numDegreeOfFreedomQ = totalDegreeOfFreedomQ;
							serverCmd.m_sendActualStateArgs.m_numDegreeOfFreedomU = totalDegreeOfFreedomU;
							
							
						} else
						{
							b3Warning("Request state but no multibody available");
							//rigid bodies?
						}
/*

											//now we send back the actual q, q' and force/torque and IMU sensor values
					for (int i=0;i<m_jointFeedbacks.size();i++)
					{
						printf("Applied force A:(%f,%f,%f), torque A:(%f,%f,%f)\nForce B:(%f,%f,%f), torque B:(%f,%f,%f)\n", 
							m_jointFeedbacks[i]->m_appliedForceBodyA.x(),
							m_jointFeedbacks[i]->m_appliedForceBodyA.y(),
							m_jointFeedbacks[i]->m_appliedForceBodyA.z(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyA.x(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyA.y(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyA.z(),
							m_jointFeedbacks[i]->m_appliedForceBodyB.x(),
							m_jointFeedbacks[i]->m_appliedForceBodyB.y(),
							m_jointFeedbacks[i]->m_appliedForceBodyB.z(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyB.x(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyB.y(),
							m_jointFeedbacks[i]->m_appliedTorqueBodyB.z());
					}
					*/

						m_data->m_testBlock1->m_numServerCommands++;

						
						break;
					}
                case CMD_STEP_FORWARD_SIMULATION:
                {
                   
                    b3Printf("Step simulation request");
                    double timeStep = clientCmd.m_stepSimulationArguments.m_deltaTimeInSeconds;
                    m_data->m_dynamicsWorld->stepSimulation(timeStep);
                    
                    SharedMemoryCommand& serverCmd =m_data->m_testBlock1->m_serverCommands[0];
                    
                    serverCmd.m_type =CMD_STEP_FORWARD_SIMULATION_COMPLETED;
                    m_data->m_testBlock1->m_numServerCommands++;

                    break;
                }
                case CMD_SHUTDOWN:
                {
					btAssert(0);
                    //wantsShutdown = true;
                    break;
                }
				case CMD_CREATE_BOX_COLLISION_SHAPE:
					{
						btVector3 halfExtents(30,30,1);
						btTransform startTrans;
						startTrans.setIdentity();
						startTrans.setOrigin(btVector3(0,0,-4));
						
						btBulletWorldImporter* worldImporter = new btBulletWorldImporter(m_data->m_dynamicsWorld);
						m_data->m_worldImporters.push_back(worldImporter);

						btCollisionShape* shape = worldImporter->createBoxShape(halfExtents);
						btScalar mass = 0.f;
						bool isDynamic = (mass>0);
						worldImporter->createRigidBody(isDynamic,mass,startTrans,shape,0);
						m_data->m_guiHelper->autogenerateGraphicsObjects(this->m_data->m_dynamicsWorld);
						SharedMemoryCommand& serverCmd =m_data->m_testBlock1->m_serverCommands[0];
						serverCmd.m_type =CMD_STEP_FORWARD_SIMULATION_COMPLETED;
						m_data->m_testBlock1->m_numServerCommands++;
						break;
					}
                default:
                {
                    b3Error("Unsupported command encountered");
                    btAssert(0);
                }
            };
            
           
            
            //process the command right now
            
        }
    }
}