コード例 #1
0
int main(int argc,char* argv[])
	{
	LidarProcessOctree lpo(argv[1],512*1024*1024);
	
	#if 0
	Misc::Timer t;
	{
	// BinaryPointSaver bps(argv[2]);
	double scale[3]={0.001,0.001,0.001};
	double offset[3];
	for(int i=0;i<3;++i)
		offset[i]=lpo.getDomain().getCenter(i);
	LasPointSaver lps(argv[2],scale,offset);
	// PointCounter pc;
	Box box(Box::Point(2.04446e6,617053.0,-1000.0),Box::Point(2.04446e6+100.0,617053.0+100.0,1000.0));
	lpo.processPointsInBox(box,lps);
	// std::cout<<lps.getNumPoints()<<std::endl;
	}
	t.elapse();
	std::cout<<"Done in "<<t.getTime()*1000.0<<" ms"<<std::endl;
	#elif 0
	PointSaver ps(argv[2]);
	Box box=Box::full;
	for(int i=0;i<2;++i)
		{
		box.min[i]=atof(argv[3+i]);
		box.max[i]=atof(argv[5+i]);
		}
	lpo.processPointsInBox(box,ps);
	#elif 0
	PointCounter pc;
	lpo.processPoints(pc);
	std::cout<<pc.getNumPoints()<<std::endl;
	#else
	Scalar radius=Scalar(0.1);
	PointDensityCalculator pdc(lpo,radius,4);
	#if 0
	Box box;
	box.min=Point(930,530,0);
	box.max=Point(970,570,100);
	lpo.processPointsInBox(box,pdc);
	#else
	// lpo.processPoints(pdc);
	lpo.processNodesPostfix(pdc);
	#endif
	
	std::cout<<"Number of processed points: "<<pdc.numPoints<<std::endl;
	std::cout<<"Total number of found neighbors: "<<pdc.totalNumNeighbors<<std::endl;
	std::cout<<"Total number of loaded octree nodes: "<<lpo.getNumSubdivideCalls()<<", "<<lpo.getNumLoadedNodes()<<std::endl;
	std::cout<<"Average point density in 1/m^3: "<<pdc.totalNumNeighbors/(pdc.numPoints*4.0/3.0*3.141592654*radius*radius*radius)<<std::endl;
	#endif
	
	return 0;
	}
コード例 #2
0
void PointAccumulator::savePoints(void)
	{
	/* Create a temporary octree for the current in-memory point set: */
	std::cout<<std::endl<<"Storing "<<points.size()<<" points as temporary octree..."<<std::flush;
	char tofnt[1024];
	strcpy(tofnt,tempOctreeFileNameTemplate.c_str());
	Misc::Timer t;
	TempOctree* to=new TempOctree(tofnt,maxNumPointsPerNode,&points[0],points.size());
	t.elapse();
	std::cout<<" done in "<<t.getTime()*1000.0<<" ms"<<std::endl;
	tempOctrees.push_back(to);
	
	/* Clear the point set: */
	points.clear();
	}
コード例 #3
0
int main(int argc,char* argv[])
	{
	LidarProcessOctree lpo(argv[1],512*1024*1024);
	
	Misc::Timer t;
	
	size_t numLeafPoints=0;
	for(LidarProcessOctree::PointIterator pIt=lpo.beginNodes();pIt!=lpo.endNodes();++pIt)
		++numLeafPoints;
	
	t.elapse();
	std::cout<<numLeafPoints<<" leaf points, ";
	std::cout<<"done in "<<t.getTime()*1000.0<<" ms"<<std::endl;
	
	return 0;
	}
コード例 #4
0
ファイル: DeviceTest.cpp プロジェクト: jrevote/3DA-Vrui
int main(int argc,char* argv[])
	{
	/* Parse command line: */
	char* serverName=0;
	int trackerIndex=0;
	int printMode=0;
	bool printButtonStates=false;
	bool printNewlines=false;
	for(int i=1;i<argc;++i)
		{
		if(argv[i][0]=='-')
			{
			if(strcasecmp(argv[i],"-t")==0||strcasecmp(argv[i],"--trackerIndex")==0)
				{
				++i;
				trackerIndex=atoi(argv[i]);
				}
			else if(strcasecmp(argv[i],"-alltrackers")==0)
				trackerIndex=-1;
			else if(strcasecmp(argv[i],"-p")==0)
				printMode=0;
			else if(strcasecmp(argv[i],"-o")==0)
				printMode=1;
			else if(strcasecmp(argv[i],"-f")==0)
				printMode=2;
			else if(strcasecmp(argv[i],"-v")==0)
				printMode=3;
			else if(strcasecmp(argv[i],"-b")==0)
				printButtonStates=true;
			else if(strcasecmp(argv[i],"-n")==0)
				printNewlines=true;
			}
		else
			serverName=argv[i];
		}
	
	if(serverName==0)
		{
		std::cerr<<"Usage: "<<argv[0]<<" [(-t | --trackerIndex) <trackerIndex>] [-p | -o | -f | -v] [-b] <serverName:serverPort>"<<std::endl;
		return 1;
		}
	
	/* Initialize device client: */
	Vrui::VRDeviceClient* deviceClient=0;
	try
		{
		/* Split the server name into hostname:port: */
		char* colonPtr=0;
		for(char* cPtr=serverName;*cPtr!='\0';++cPtr)
			if(*cPtr==':')
				colonPtr=cPtr;
		int portNumber=0;
		if(colonPtr!=0)
			{
			portNumber=atoi(colonPtr+1);
			*colonPtr='\0';
			}
		deviceClient=new Vrui::VRDeviceClient(serverName,portNumber);
		}
	catch(std::runtime_error error)
		{
		std::cerr<<"Caught exception "<<error.what()<<" while initializing VR device client"<<std::endl;
		return 1;
		}
	
	/* Print output header line: */
	switch(printMode)
		{
		case 0:
			std::cout<<"  Pos X    Pos Y    Pos Z   "<<std::endl;
			break;
		
		case 1:
			std::cout<<"  Pos X    Pos Y    Pos Z      Axis X   Axis Y   Axis Z    Angle  "<<std::endl;
			break;
		
		case 2:
			std::cout<<" Pos X  Pos Y  Pos Z     XA X   XA Y   XA Z     YA X   YA Y   YA Z     ZA X   ZA Y   ZA Z  "<<std::endl;
			break;
		}
	
	/* Run main loop: */
	deviceClient->activate();
	deviceClient->startStream();
	bool loop=true;
	Misc::Timer t;
	int numPackets=0;
	while(loop)
		{
		/* Print new device state: */
		if(!printNewlines)
			std::cout<<"\r";
		deviceClient->lockState();
		const Vrui::VRDeviceState& state=deviceClient->getState();
		switch(printMode)
			{
			case 0:
				if(trackerIndex<0)
					{
					printTrackerPos(state,0);
					for(int i=1;i<state.getNumTrackers();++i)
						{
						std::cout<<" ";
						printTrackerPos(state,i);
						}
					}
				else
					printTrackerPos(state,trackerIndex);
				break;
			
			case 1:
				printTrackerPosOrient(state,trackerIndex);
				break;
			
			case 2:
				printTrackerFrame(state,trackerIndex);
				break;
			
			case 3:
				printValuators(state);
				break;
			}
		if(printButtonStates)
			{
			std::cout<<" ";
			printButtons(state);
			}
		deviceClient->unlockState();
		if(printNewlines)
			std::cout<<std::endl;
		else
			std::cout<<std::flush;
		
		/* Check for a key press event: */
		fd_set readFdSet;
		FD_ZERO(&readFdSet);
		FD_SET(fileno(stdin),&readFdSet);
		struct timeval timeout;
		timeout.tv_sec=0;
		timeout.tv_usec=0;
		bool dataWaiting=select(fileno(stdin)+1,&readFdSet,0,0,&timeout)>=0&&FD_ISSET(fileno(stdin),&readFdSet);
		if(dataWaiting)
			loop=false;
		
		if(loop)
			{
			/* Wait for next packet: */
			deviceClient->getPacket();
			++numPackets;
			}
		}
	std::cout<<std::endl;
	t.elapse();
	std::cout<<"Received "<<numPackets<<" device data packets in "<<t.getTime()*1000.0<<" ms ("<<double(numPackets)/t.getTime()<<" packets/s)"<<std::endl;
	deviceClient->stopStream();
	deviceClient->deactivate();
	
	/* Clean up and terminate: */
	delete deviceClient;
	return 0;
	}
コード例 #5
0
int main(int argc,char* argv[])
	{
	/* Set default values for all parameters: */
	unsigned int memoryCacheSize=512;
	unsigned int tempOctreeMaxNumPointsPerNode=4096;
	std::string tempOctreeFileNameTemplate="/tmp/Pointe_Preprocessor_TempOctree";
	unsigned int maxNumPointsPerNode=4096;
	std::string tempPointFileNameTemplate="/tmp/Pointe_Preprocessor_TempPoints";
	
	const char * fileName=0;
	float valueMinimum=Math::Constants<float>::max;
	float valueMaximum=Math::Constants<float>::min;
	float * histogram;

	try
		{
		/* Open Pointe-Samhlaigh's configuration file: */
		Misc::ConfigurationFile configFile(POINTE_CONFIGFILENAME);
		Misc::ConfigurationFileSection cfg=configFile.getSection("/Pointe_Preprocessor");
		
		/* Override program settings from configuration file: */
		memoryCacheSize=cfg.retrieveValue<unsigned int>("./memoryCacheSize",memoryCacheSize);
		tempOctreeMaxNumPointsPerNode=cfg.retrieveValue<unsigned int>("./tempOctreeMaxNumPointsPerNode",tempOctreeMaxNumPointsPerNode);
		tempOctreeFileNameTemplate=cfg.retrieveValue<std::string>("./tempOctreeFileNameTemplate",tempOctreeFileNameTemplate);
		maxNumPointsPerNode=cfg.retrieveValue<unsigned int>("./maxNumPointsPerNode",maxNumPointsPerNode);
		tempPointFileNameTemplate=cfg.retrieveValue<std::string>("./tempPointFileNameTemplate",tempPointFileNameTemplate);
		}
	catch(std::runtime_error err)
		{
		/* Just ignore the error */
		}
	
	/* Initialize transient parameters: */
	const char* outputFileName=0;
	PointFileType pointFileType=XYZI;
	bool havePoints=false;
	
	/* Parse the command line and load all input files: */
	Misc::Timer loadTimer;
	PointeAccumulator pa;
	pa.setMemorySize(memoryCacheSize,tempOctreeMaxNumPointsPerNode);
	pa.setTempOctreeFileNameTemplate(tempOctreeFileNameTemplate+"XXXXXX");
	for(int i=1;i<argc;++i)
		{
		if(argv[i][0]=='-')
			{
			if(strcasecmp(argv[i]+1,"o")==0)
				{
				++i;
				if(i<argc)
					outputFileName=argv[i];
				else
					std::cerr<<"Dangling -o flag on command line"<<std::endl;
				}
			else if(strcasecmp(argv[i]+1,"np")==0)
				{
				++i;
				if(i<argc)
					maxNumPointsPerNode=(unsigned int)(atoi(argv[i]));
				else
					std::cerr<<"Dangling -np flag on command line"<<std::endl;
				}
			else if(strcasecmp(argv[i]+1,"cs")==0)
				{
				++i;
				if(i<argc)
					{
					memoryCacheSize=(unsigned int)(atoi(argv[i]));
					pa.setMemorySize(memoryCacheSize,tempOctreeMaxNumPointsPerNode);
					}
				else
					std::cerr<<"Dangling -cs flag on command line"<<std::endl;
				}
			else if(strcasecmp(argv[i]+1,"to")==0)
				{
				++i;
				if(i<argc)
					{
					if(!havePoints)
						{
						tempOctreeFileNameTemplate=argv[i];
						pa.setTempOctreeFileNameTemplate(tempOctreeFileNameTemplate+"XXXXXX");
						}
					else
						std::cerr<<"Ignoring -to flag; must be specified before any input point sets are read"<<std::endl;
					}
				else
					std::cerr<<"Dangling -to flag on command line"<<std::endl;
				}
			else if(strcasecmp(argv[i]+1,"tp")==0)
				{
				++i;
				if(i<argc)
					tempPointFileNameTemplate=argv[i];
				else
					std::cerr<<"Dangling -tp flag on command line"<<std::endl;
				}
			else if(strcasecmp(argv[i]+1,"xyzi")==0)
				pointFileType=XYZI;
			else
				std::cerr<<"Unrecognized command line option "<<argv[i]<<std::endl;
			}
		else
			{
			PointFileType thisPointFileType=pointFileType;
			switch(thisPointFileType)
				{
				case XYZI:
					std::cout<<"Processing XYZI input file "<<argv[i]<<"..."<<std::flush;
					histogram = new float[256];
					fileName=argv[i];
					loadPointFileXyzi(pa, fileName, &valueMaximum, &valueMinimum);
					for(int index=0;index<256;index++)
						histogram[index]=0.0f;
					createHistogram(fileName, histogram, valueMaximum, valueMinimum);
					havePoints=true;
					std::cout<<" done."<<std::endl;
					break;

				default:
					std::cerr<<"Input file "<<argv[i]<<" has an unrecognized file format"<<std::endl;
				}
			}
		}
	
	/* Check if an output file name was given: */
	if(outputFileName==0)
		{
		std::cerr<<"Usage: "<<argv[0]<<"-o <output file name> -np <max points per node> <input file spec>"<<std::endl;
		std::cerr<<"Input file spec:  <format spec> <file name>"<<std::endl;
		std::cerr<<"Format spec: -XYZI"<<std::endl;
		std::cerr<<"             -XYZRGB"<<std::endl;
		return 1;
		}
	
	/* Finish reading points: */
	pa.finishReading();
	loadTimer.elapse();
	
	/* Construct an octree with less than maxPointsPerNode points per leaf: */
	Misc::Timer createTimer;
	OctreeCreator tree(pa.getMaxNumCacheablePoints(),maxNumPointsPerNode,pa.getTempOctrees(),tempPointFileNameTemplate+"XXXXXX", histogram, valueMaximum, valueMinimum);
	
	/* Delete the temporary point octrees: */
	pa.deleteTempOctrees();
	createTimer.elapse();
	
	/* Write the octree structure and data to the destination file: */
	Misc::Timer writeTimer;
	tree.write(outputFileName);
	writeTimer.elapse();

	std::cout<<"Time to load input data: "<<loadTimer.getTime()<<"s, time to create octree: "<<createTimer.getTime()<<"s, time to write final octree files: "<<writeTimer.getTime()<<"s"<<std::endl;
	
	return 0;
	}
コード例 #6
0
int main(int argc,char* argv[])
	{
	/* Open the depth stream file: */
	IO::FilePtr depthFrameFile(IO::openFile("/work/okreylos/3DVideo/Kinect/DepthFrames.dat"));
	depthFrameFile->setEndianness(Misc::LittleEndian);
	
	/* Read the file header: */
	unsigned int size[2];
	depthFrameFile->read(size,2);
	
	/* Create a background frame: */
	unsigned short* backgroundFrame=new unsigned short[size[1]*size[0]];
	unsigned short* bfPtr=backgroundFrame;
	for(unsigned int y=0;y<size[1];++y)
		for(unsigned int x=0;x<size[0];++x,++bfPtr)
			*bfPtr=0x07ffU;
	unsigned int numCaptureFrames=150;
	
	/* Create the depth frame writer: */
	IO::FilePtr compressedDepthFrameFile(IO::openFile("/work/okreylos/3DVideo/Kinect/CompressedDepthFrames.dat",IO::File::WriteOnly));
	Kinect::DepthFrameWriter depthFrameWriter(*compressedDepthFrameFile,size);
	
	/* Process all frames from the depth frame file: */
	size_t totalSize=0;
	double totalTime=0.0;
	double maxTime=0.0;
	unsigned int numFrames=0;
	while(!depthFrameFile->eof())
		{
		/* Read the next frame's time stamp: */
		double timeStamp=depthFrameFile->read<double>();
		
		/* Read the next depth frame: */
		Kinect::FrameBuffer frame(size[0],size[1],size[1]*size[0]*sizeof(unsigned short));
		unsigned short* frameBuffer=static_cast<unsigned short*>(frame.getBuffer());
		depthFrameFile->read(frameBuffer,size[1]*size[0]);
		
		if(numCaptureFrames>0)
			{
			/* Add the depth frame to the background frame: */
			unsigned short* bfPtr=backgroundFrame;
			const unsigned short* dfPtr=frameBuffer;
			for(unsigned int y=0;y<size[1];++y)
				for(unsigned int x=0;x<size[0];++x,++bfPtr,++dfPtr)
					if(*bfPtr>*dfPtr-2)
						*bfPtr=*dfPtr-2;
			--numCaptureFrames;
			}
		else
			{
			/* Remove background from the depth frame: */
			const unsigned short* bfPtr=backgroundFrame;
			unsigned short* dfPtr=frameBuffer;
			for(unsigned int y=0;y<size[1];++y)
				for(unsigned int x=0;x<size[0];++x,++bfPtr,++dfPtr)
					if(*dfPtr>=*bfPtr)
						*dfPtr=0x07ffU;
			}
		
		/* Compress and save the depth frame: */
		Misc::Timer compressTime;
		compressedDepthFrameFile->write<double>(timeStamp);
		size_t compressedSize=depthFrameWriter.writeFrame(frame);
		compressTime.elapse();
		double time=compressTime.getTime();
		totalSize+=compressedSize;
		totalTime+=time;
		if(maxTime<time)
			maxTime=time;
		++numFrames;
		}
	std::cout<<"Total compression time: "<<totalTime*1000.0<<" ms, total file size: "<<totalSize<<", "<<numFrames<<" frames"<<std::endl;
	std::cout<<"Maximum compression time: "<<maxTime*1000.0<<" ms"<<std::endl;
	std::cout<<"Compression frame rate: "<<double(numFrames)/totalTime<<" Hz"<<std::endl;
	std::cout<<"Bandwidth: "<<double(totalSize)*30.0/double(numFrames)/(1024.0*1024.0)<<"MB/s"<<std::endl;
	
	return 0;
	}
コード例 #7
0
int main(int argc,char* argv[])
	{
	/* Open the uncompressed depth stream file: */
	IO::FilePtr depthFrameFile(IO::openFile("/work/okreylos/3DVideo/Kinect/DepthFrames.dat"));
	depthFrameFile->setEndianness(Misc::LittleEndian);
	
	/* Read the file header: */
	unsigned int size[2];
	depthFrameFile->read(size,2);
	
	/* Create a background frame: */
	unsigned short* backgroundFrame=new unsigned short[size[1]*size[0]];
	unsigned short* bfPtr=backgroundFrame;
	for(unsigned int y=0;y<size[1];++y)
		for(unsigned int x=0;x<size[0];++x,++bfPtr)
			*bfPtr=0x07ffU;
	unsigned int numCaptureFrames=150;
	
	/* Create the depth frame writer and reader: */
	IO::FilePtr compressedDepthFrameFile(IO::openFile("/work/okreylos/3DVideo/Kinect/CompressedDepthFrames.dat",IO::File::ReadWrite));
	Kinect::DepthFrameWriter depthFrameWriter(*compressedDepthFrameFile,size);
	compressedDepthFrameFile->flush();
	Kinect::DepthFrameReader depthFrameReader(*compressedDepthFrameFile);
	
	/* Process all frames from the two depth frame files: */
	double totalTime=0.0;
	double maxTime=0.0;
	unsigned int numFrames=0;
	while(!depthFrameFile->eof())
		{
		/* Read the next uncompressed depth frame: */
		Kinect::FrameBuffer frame0(size[0],size[1],size[1]*size[0]*sizeof(unsigned short));
		frame0.timeStamp=depthFrameFile->read<double>();
		unsigned short* frameBuffer0=frame0.getData<unsigned short>();
		depthFrameFile->read(frameBuffer0,size[1]*size[0]);
		
		if(numCaptureFrames>0)
			{
			/* Add the depth frame to the background frame: */
			unsigned short* bfPtr=backgroundFrame;
			const unsigned short* dfPtr=frameBuffer0;
			for(unsigned int y=0;y<size[1];++y)
				for(unsigned int x=0;x<size[0];++x,++bfPtr,++dfPtr)
					if(*bfPtr>*dfPtr-2)
						*bfPtr=*dfPtr-2;
			--numCaptureFrames;
			}
		else
			{
			/* Remove background from the depth frame: */
			const unsigned short* bfPtr=backgroundFrame;
			unsigned short* dfPtr=frameBuffer0;
			for(unsigned int y=0;y<size[1];++y)
				for(unsigned int x=0;x<size[0];++x,++bfPtr,++dfPtr)
					if(*dfPtr>=*bfPtr)
						*dfPtr=0x07ffU;
			}
		
		/* Write the compressed depth frame: */
		depthFrameWriter.writeFrame(frame0);
		compressedDepthFrameFile->flush();
		
		/* Read the next compressed depth frame: */
		Misc::Timer uncompressTime;
		Kinect::FrameBuffer frame1=depthFrameReader.readNextFrame();
		uncompressTime.elapse();
		double time=uncompressTime.getTime();
		totalTime+=time;
		if(maxTime<time)
			maxTime=time;
		++numFrames;
		
		/* Compare the two frames: */
		unsigned int numPixels=size[0]*size[1];
		const unsigned short* f0Ptr=frameBuffer0;
		const unsigned short* f1Ptr=frame1.getData<unsigned short>();
		while(numPixels>0)
			{
			if(*f0Ptr!=*f1Ptr)
				std::cerr<<"Difference in frame "<<numFrames-1<<", "<<numPixels<<" pixels left"<<std::endl;
			++f0Ptr;
			++f1Ptr;
			--numPixels;
			}
		}
	std::cout<<"Total decompression time: "<<totalTime*1000.0<<" ms, "<<numFrames<<" frames"<<std::endl;
	std::cout<<"Maximum decompression time: "<<maxTime*1000.0<<" ms"<<std::endl;
	std::cout<<"Decompression frame rate: "<<double(numFrames)/totalTime<<" Hz"<<std::endl;
	
	return 0;
	}
コード例 #8
0
void SpaceBall::deviceThreadMethod(void)
	{
	/* Create free-running timer to estimate tracker velocities: */
	Misc::Timer timer;
	bool notFirstMeasurement=false;
	
	/* Receive lines from the serial port until interrupted: */
	while(true)
		{
		/* Read characters until an end-of-line is encountered: */
		unsigned char packet[256];
		readPacket(256,packet);
		
		/* Determine the packet type: */
		switch(packet[0])
			{
			case 'D':
				{
				Vrui::VRDeviceState::TrackerState ts;
				
				/* Parse a data packet: */
				short int rawData[6];
				rawData[0]=(short int)(((unsigned int)packet[ 3]<<8)|(unsigned int)packet[ 4]);
				rawData[1]=(short int)(((unsigned int)packet[ 5]<<8)|(unsigned int)packet[ 6]);
				rawData[2]=(short int)(((unsigned int)packet[ 7]<<8)|(unsigned int)packet[ 8]);
				rawData[3]=(short int)(((unsigned int)packet[ 9]<<8)|(unsigned int)packet[10]);
				rawData[4]=(short int)(((unsigned int)packet[11]<<8)|(unsigned int)packet[12]);
				rawData[5]=(short int)(((unsigned int)packet[13]<<8)|(unsigned int)packet[14]);
				
				/* Calibrate linear data: */
				PositionOrientation::Vector translation;
				for(int i=0;i<3;++i)
					translation[i]=double(rawData[i])*linearGain;
				translation[2]=-translation[2]; // Z-axis values are negated (?!?)
				
				/* Calibrate angular data: */
				PositionOrientation::Vector rotationAxis;
				for(int i=0;i<3;++i)
					rotationAxis[i]=double(rawData[i+3])*angularGain;
				rotationAxis[2]=-rotationAxis[2]; // Z-axis values are negated (?!?)
				
				/* Construct incremental transformation: */
				PositionOrientation t=PositionOrientation::translate(translation);
				PositionOrientation::Scalar rotationAngle=Geometry::mag(rotationAxis);
				PositionOrientation::Rotation rotation=PositionOrientation::Rotation::rotateAxis(rotationAxis,rotationAngle);
				t*=PositionOrientation::rotate(rotation);
				
				/* Accumulate current device position/orientation: */
				currentPositionOrientation*=t;
				// currentPositionOrientation.leftMultiply(t);
				ts.positionOrientation=currentPositionOrientation;
				
				/* Calculate linear and angular velocities: */
				timer.elapse();
				if(notFirstMeasurement)
					{
					/* Estimate velocities by dividing position/orientation differences by elapsed time since last measurement: */
					double time=timer.getTime();
					ts.linearVelocity=translation/Vrui::VRDeviceState::TrackerState::LinearVelocity::Scalar(time);
					ts.angularVelocity=rotationAxis/Vrui::VRDeviceState::TrackerState::AngularVelocity::Scalar(time);
					}
				else
					{
					/* Force initial velocities to zero: */
					ts.linearVelocity=Vrui::VRDeviceState::TrackerState::LinearVelocity::zero;
					ts.angularVelocity=Vrui::VRDeviceState::TrackerState::AngularVelocity::zero;
					notFirstMeasurement=true;
					}
				
				/* Update tracker state: */
				setTrackerState(0,ts);
				break;
				}
			
			case '.':
				{
				/* Parse a button event packet: */
				int buttonMask=0x0;
				buttonMask|=int(packet[2]&0x3f);
				buttonMask|=int(packet[2]&0x80)>>1;
				buttonMask|=int(packet[1]&0x1f)<<7;
				
				/* Update the current button states: */
				for(int i=0;i<12;++i)
					setButtonState(i,buttonMask&(1<<i));
				break;
				}
			}
		}
	}