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// to construct a Delaunay_triangulation from a OFF file
#include <gudhi/Delaunay_triangulation_off_io.h>
#include <CGAL/Delaunay_triangulation.h>
#include <CGAL/Epick_d.h>
#include <iostream>
#include <string>
// Use dynamic_dimension_tag for the user to be able to set dimension
typedef CGAL::Epick_d< CGAL::Dynamic_dimension_tag > K;
typedef CGAL::Delaunay_triangulation<K> T;
// The triangulation uses the default instantiation of the
// TriangulationDataStructure template parameter
void usage(char * const progName) {
std::cerr << "Usage: " << progName << " inputFile.off outputFile.off" << std::endl;
exit(-1); // ----- >>
}
int main(int argc, char **argv) {
if (argc != 3) {
std::cerr << "Error: Number of arguments (" << argc << ") is not correct" << std::endl;
usage(argv[0]);
}
std::string offInputFile(argv[1]);
// Read the OFF file (input file name given as parameter) and triangulates points
Gudhi::Delaunay_triangulation_off_reader<T> off_reader(offInputFile);
// Check the read operation was correct
if (!off_reader.is_valid()) {
std::cerr << "Unable to read file " << offInputFile << std::endl;
exit(-1); // ----- >>
}
// Retrieve the triangulation
T* triangulation = off_reader.get_complex();
// Operations on triangulation
std::cout << "Number of vertices= " << triangulation->number_of_vertices() << std::endl;
std::cout << "Number of finite full cells= " << triangulation->number_of_finite_full_cells() << std::endl;
std::string outFileName(argv[2]);
std::string offOutputFile(outFileName);
// Write the OFF file (output file name given as parameter) with the points and triangulated cells as faces
Gudhi::Delaunay_triangulation_off_writer<T> off_writer(offOutputFile, triangulation);
// Check the write operation was correct
if (!off_writer.is_valid()) {
std::cerr << "Unable to write file " << offOutputFile << std::endl;
exit(-1); // ----- >>
}
return 0;
}
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