CGAL 6.1.2 - dD Frechet Distance: Frechet_distance/Frechet_DS_d.cpp

CGAL 6.1.2 - dD Frechet Distance

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Frechet_distance/Frechet_DS_d.cpp
#include <CGAL/Frechet_distance.h>
#include <CGAL/Frechet_distance_traits_d.h>
#include <CGAL/Frechet_distance/Neighbor_search.h>
#include <CGAL/Epick_d.h>
#include <CGAL/IO/WKT.h>
#include <ostream>
#include <fstream>
#include <filesystem>
using Kernel = CGAL::Epick_d<CGAL::Dimension_tag<4>>;
using Traits = CGAL::Frechet_distance_traits_d<Kernel>;
using Point = Traits::Point_d;
using Curve = std::vector<Point>;
using Curves = std::vector<Curve>;
int main()
{
Curves curves;
Curve polylineA = { Point(0,0,0,0), Point(1,0,0,0), Point(1,1,0,1),Point(1,1,1,0)};
Curve polylineB = { Point(0,0,0,0), Point(1,0,0,0), Point(1,1,0,0),Point(1,1,1,0)};
Curve polylineC = { Point(0,0,0,1), Point(1,0,0,0), Point(1,1,1,0),Point(1,1,0,0)};
curves.push_back(polylineA);
curves.push_back(polylineB);
curves.push_back(polylineC);
// last curve is the query curve
Curve query = curves.back();
curves.pop_back();
CGAL::Frechet_distance::Neighbor_search<Curve,Traits> ds(curves);
for(const Curve& c : curves){
std::pair<double, double> res = CGAL::bounded_error_Frechet_distance(c, query, 0.000001);
std::cout << "The Frechet distance between the polylines is between " << res.first << " and " << res.second << std::endl;
}
double distance = 1.1;
std::vector<std::size_t> result = ds. get_close_curves(query, distance);
std::cout << result.size() << " curves at Frechet distance closer than " << distance << std::endl;
}
CGAL::Frechet_distance::Neighbor_search
A data structure to store polylines with a function that enables to find those polylines which are cl...
Definition: Neighbor_search.h:44
CGAL::Frechet_distance::Neighbor_search::get_close_curves
std::vector< std::size_t > get_close_curves(const PointRange &query, double distance)
returns the indices of the inserted polylines that are closer than distance to the polyline query.
Definition: Neighbor_search.h:79
CGAL::Frechet_distance_traits_d
Definition: Frechet_distance_traits_d.h:34
CGAL::bounded_error_Frechet_distance
std::pair< double, double > bounded_error_Frechet_distance(const PointRange &polyline1, const PointRange &polyline2, const double error_bound, const NamedParameters &np=parameters::default_values())
returns an estimate of the Fréchet distance between the two polylines that is at most error_bound awa...
Definition: Frechet_distance.h:173
Kernel
CGAL::Epick_d