#include <PointListReader.h>

Static Public Member Functions
static std::vector< TPoint >	getPointsFromInputStream (std::istream &in, std::vector< unsigned int > aVectPosition=std::vector< unsigned int >())
static std::vector< TPoint >	getPointsFromFile (const std::string &filename, std::vector< unsigned int > aVectPosition=std::vector< unsigned int >())
static std::vector < std::vector< TPoint > >	getPolygonsFromFile (const std::string &filename)
static std::vector < std::vector< TPoint > >	getPolygonsFromInputStream (std::istream &in)
template<typename TInteger >
static std::vector < FreemanChain< TInteger > >	getFreemanChainsFromFile (const std::string &filename)

Detailed Description

template<typename TPoint>
struct DGtal::PointListReader< TPoint >

Aim: Implements method to read a set of points represented in each line of a file.

Description of class 'PointListReader'

The main method to read a set of points as a simple format where each elements is represented in a single line. Blank line or line beginning with "#" are skipped.

Simple example:

      #include "DGtal/helpers/StdDefs.h"
      .... 
      string filename= "testFile.dat"; 
      vector<Z2i::Point> vectPoints = PointListReader<Z2i::Point>::getPointsFromFile(filename);

and you can specifying the point position:

   vector<unsigned int> vIndice;
   vIndice.push_back(1); // select for X coordinate the second position number of the line.
   vIndice.push_back(2); // select for Y coordinate the third position number of the line.
   vector<Z2i::Point> vectPoints = PointListReader<Z2i::Point>::getPointsFromFile(filename,vectPos);

See also:: testPointListReader.cpp

Examples:: io/digitalSetFromPointList.cpp.

Definition at line 84 of file PointListReader.h.

Member Function Documentation

template<typename TPoint >

template<typename TInteger >

std::vector< FreemanChain< TInteger > > DGtal::PointListReader< TPoint >::getFreemanChainsFromFile ( const std::string & filename )

inlinestatic

Main method to FreemanChain contours. Each line of the file should represent a FreemanChain

Parameters:

filename

Returns:: the vector containing the set of FreemanChain.

Definition at line 152 of file PointListReader.ih.

                                                                                {
  std::vector< FreemanChain<  TInteger> >   vectResult;
  ifstream infile;
  infile.open (filename.c_str(), ifstream::in);
  string str;
  getline(infile, str );
  while ( infile.good() ){
    if ( ( str != "" ) && ( str[ 0 ] != '#' ) ){
      istringstream in_str( str );
      int x0, y0;
      string fcChain;
      bool isOK = (in_str >> x0) && (in_str >> y0) && (in_str >> fcChain);
      FreemanChain< TInteger> fc(fcChain, x0, y0);
      if(isOK){
  vectResult.push_back(fc);
      }else{
  cerr << "Ignoring entry invalid FreemanChain" << endl;
      }
    }
    getline(infile, str );
  }  
  return vectResult;
}

template<typename TPoint >

std::vector< TPoint > DGtal::PointListReader< TPoint >::getPointsFromFile	(	const std::string &	filename,
		std::vector< unsigned int >	aVectPosition = `std::vector<unsigned int>()`
	)

inlinestatic

Main method to import a vector containing a list of points defined in a file where each line defines a point.

Parameters:

filename
aVectPosition	used to specify the position of indices of value points (optional: default set to 0,..,dimension)

Returns:: a vector containing the set of points.

Definition at line 50 of file PointListReader.ih.

{
  ifstream infile;
  infile.open (filename.c_str(), ifstream::in);
  return PointListReader<TPoint>::getPointsFromInputStream(infile, aVectPosition);
}

template<typename TPoint >

std::vector< TPoint > DGtal::PointListReader< TPoint >::getPointsFromInputStream	(	std::istream &	in,
		std::vector< unsigned int >	aVectPosition = `std::vector<unsigned int>()`
	)

inlinestatic

Main method to import a vector containing a list of points defined in a file where each line defines a point.

Parameters:

in	the input stream.
aVectPosition	used to specify the position of indices of value points (default set to 0,..,dimension).

Returns:: a vector containing the set of points.

Definition at line 62 of file PointListReader.ih.

Referenced by DGtal::GridCurve< TKSpace >::initFromVectorStream().

{
  if(aVectPosition.size()==0){
    for(unsigned int i=0; i<TPoint::dimension; i++){
      aVectPosition.push_back(i);
    }
  }
  vector<TPoint> vectResult;
  string str;
  getline(in, str );
  while ( in.good() ){
    if ( ( str != "" ) && ( str[ 0 ] != '#' ) ){
      istringstream in_str( str );
      unsigned int idx = 0;
      typename TPoint::Component val;
      unsigned int nbFound=0;
      TPoint p;
      while ( in_str.good()&& (nbFound<TPoint::dimension)){
  bool isOK = (in_str >> val);
  for(unsigned int j=0; j< TPoint::dimension; j++){
    if (isOK && (idx == aVectPosition.at(j)) ){
      nbFound++;
      p[j]=val;
    }
  }
  ++idx;
      }      
      if(nbFound==TPoint::dimension){
  vectResult.push_back(p);
      }
    }
    getline(in, str );
  }
  return vectResult;
}

template<typename TPoint >

std::vector< std::vector< TPoint > > DGtal::PointListReader< TPoint >::getPolygonsFromFile ( const std::string & filename )

inlinestatic

Import a vector containing all polygons defined on each line of a given file.

Parameters:

filename

Returns:: a vector containing the vector of polygons.

Definition at line 105 of file PointListReader.ih.

                                                                          {
  ifstream infile;
  infile.open (filename.c_str(), ifstream::in);
  return PointListReader<TPoint>::getPolygonsFromInputStream(infile);
}

template<typename TPoint >

std::vector< std::vector< TPoint > > DGtal::PointListReader< TPoint >::getPolygonsFromInputStream ( std::istream & in )

inlinestatic

Import a vector containing all polygons defined on each line of a given istream.

Parameters:

in	the input stream.

Returns:: a vector containing the vector of polygons.

Definition at line 115 of file PointListReader.ih.

                                                                       {
  vector< vector< TPoint > > vectResult;
  string str;
  getline(in, str );
  while ( in.good() ){
    if ( ( str != "" ) && ( str[ 0 ] != '#' ) ){
      vector <TPoint> aContour;
      istringstream in_str( str );
      double x=0.0, y=0.0;
      while ( in_str.good()){
  bool isOK = (in_str >> x);
  isOK = isOK &&  (in_str >>y);
  if(isOK){
    TPoint p;
    p[0]=x;
    p[1]=y;
    aContour.push_back(p);
  }
      }
      vectResult.push_back(aContour);
    }
    getline(in, str );
  }
  return vectResult;
}

The documentation for this struct was generated from the following files:

Static Public Member Functions

Detailed Description

template<typename TPoint> struct DGtal::PointListReader< TPoint >

Member Function Documentation

template<typename TPoint>
struct DGtal::PointListReader< TPoint >