Introduction

TrkFileIO contains reader and writer for *.trk file defined in http://www.trackvis.org/docs/?subsect=fileformat

Requirements

Compiler support for C++11

optional:

You can open the *.pro file with Qt Creator and build it. But it is not required. You can just copy source file defs.h, trkfileio.h and trkfileio.cpp to your project folder and complie them with whatever you want.

Quick Start

Just copy defs.h, trkfileio.h and trkfileio.cpp to your project.

Following code does 0.1% random sampling on input track file.

#include <iostream>
#include <stdlib.h>
#include <time.h>
#include "trkfileio.h"
using namespace std;

int main()
{
    /// input & output filename
    string strInputFilePath  = "/path/to/input.trk";
    string strOutputFilePath = "/path/to/output.trk";

    /// create reader and open file
    TrkFileReader cReader(strInputFilePath);
    if( !cReader.open() )
        return EXIT_FAILURE;

    /// create writer and create an empty new file
    TrkFileWriter cWriter(strOutputFilePath);
    cWriter.copyHeader(cReader.getHeader());    /// Copy header from the input file, beacuse the coordinates system (LPS/RAS/..) is defined in header.
    if( !cWriter.create() )
        return EXIT_FAILURE;

    /// random sampling (0.1%)
    vector<float> cTrk;
    int iTotalTrackNum = cReader.getTotalTrkNum();  /// total number of tracks in input file
    srand(time(nullptr));                           /// random seed
    for(int i = 0; i < iTotalTrackNum; i++)
    {
        if( rand() % 1000 < 998 )   /// 0.1% random sampling
            continue;
        cTrk.clear();
        cReader.readTrack(i, cTrk); /// read one track from input
        cWriter.appendTrack(cTrk);  /// write it back to output
    }

    /// close input and output file
    cWriter.close();
    cReader.close();

    cout << "Finished" << endl;
    return EXIT_SUCCESS;
}