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/* This file is part of the Gudhi Library. The Gudhi library
* (Geometric Understanding in Higher Dimensions) is a generic C++
* library for computational topology.
*
* Author(s): Siargey Kachanovich
*
* Copyright (C) 2015 INRIA Sophia Antipolis-Méditerranée (France)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <iostream>
#include <fstream>
#include <ctime>
#include <sys/types.h>
#include <sys/stat.h>
//#include <stdlib.h>
//#include "gudhi/graph_simplicial_complex.h"
#include "gudhi/Witness_complex.h"
#include "gudhi/reader_utils.h"
//#include <boost/filesystem.hpp>
using namespace Gudhi;
//using namespace boost::filesystem;
typedef std::vector< Vertex_handle > typeVectorVertex;
typedef std::vector< std::vector <double> > Point_Vector;
//typedef std::pair<typeVectorVertex, Filtration_value> typeSimplex;
//typedef std::pair< Simplex_tree<>::Simplex_handle, bool > typePairSimplexBool;
/**
* \brief Customized version of read_points
* which takes into account a possible nbP first line
*
*/
inline void
read_points_cust ( std::string file_name , std::vector< std::vector< double > > & points)
{
std::ifstream in_file (file_name.c_str(),std::ios::in);
if(!in_file.is_open())
{
std::cerr << "Unable to open file " << file_name << std::endl;
return;
}
std::string line;
double x;
while( getline ( in_file , line ) )
{
std::vector< double > point;
std::istringstream iss( line );
while(iss >> x) { point.push_back(x); }
if (point.size() != 1)
points.push_back(point);
}
in_file.close();
}
void write_wl( std::string file_name, std::vector< std::vector <int> > & WL)
{
std::ofstream ofs (file_name, std::ofstream::out);
for (auto w : WL)
{
for (auto l: w)
ofs << l << " ";
ofs << "\n";
}
ofs.close();
}
void read_wl( std::string file_name, std::vector< std::vector <int> > & WL)
{
std::ifstream in_file (file_name.c_str(),std::ios::in);
if(!in_file.is_open())
{
std::cerr << "Unable to open file " << file_name << std::endl;
return;
}
std::string line;
int x;
while( getline ( in_file , line ) )
{
std::vector< int > witness;
std::istringstream iss( line );
while(iss >> x) { witness.push_back(x); }
WL.push_back(witness);
}
in_file.close();
}
int main (int argc, char * const argv[])
{
if (argc != 2)
{
std::cerr << "Usage: " << argv[0]
<< " path_to_point_file \n";
return 0;
}
/*
boost::filesystem::path p;
for (; argc > 2; --argc, ++argv)
p /= argv[1];
*/
std::string file_name = argv[1];
//int nbL = atoi(argv[2]);
clock_t start, end;
//Construct the Simplex Tree
Witness_complex<> witnessComplex;
std::cout << "Let the carnage begin!\n";
Point_Vector point_vector;
read_points_cust(file_name, point_vector);
//std::cout << "Successfully read the points\n";
// witnessComplex.witness_complex_from_points(point_vector);
std::vector<std::vector< int > > WL;
read_wl(file_name,WL);
witnessComplex.setNbL(WL[0].size());
// Write the WL matrix in a file
std::string out_file;
write_wl(out_file,WL);
start = clock();
witnessComplex.witness_complex(WL);
//
end = clock();
std::cout << "Howdy world! The process took "
<< (double)(end-start)/CLOCKS_PER_SEC << " s. \n";
out_file = "output/"+file_name+"_"+argv[2]+".stree";
std::ofstream ofs (out_file, std::ofstream::out);
witnessComplex.st_to_file(ofs);
ofs.close();
}
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