CGAL 6.1 - Spatial Sorting

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Spatial_sorting/sp_sort_using_property_map_3.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/spatial_sort.h>
#include <CGAL/Spatial_sort_traits_adapter_3.h>
#include <vector>
#include <CGAL/boost/iterator/counting_iterator.hpp>
typedef CGAL::Simple_cartesian<double> Kernel;
typedef Kernel::Point_3 Point_3;
typedef CGAL::Spatial_sort_traits_adapter_3<Kernel,
CGAL::Pointer_property_map<Point_3>::type > Search_traits_3;
int main()
{
std::vector<Point_3> points;
points.push_back(Point_3(1,3,11));
points.push_back(Point_3(14,34,46));
points.push_back(Point_3(414,34,4));
points.push_back(Point_3(4,2,56));
points.push_back(Point_3(744,4154,43));
points.push_back(Point_3(74,44,1));
std::vector<std::size_t> indices;
indices.reserve(points.size());
std::copy(boost::counting_iterator<std::size_t>(0),
boost::counting_iterator<std::size_t>(points.size()),
std::back_inserter(indices));
std::cout << "Order using default policy (median)\n";
CGAL::spatial_sort( indices.begin(),
indices.end(),
Search_traits_3(CGAL::make_property_map(points)) );
for (std::size_t i : indices)
std::cout << points[i] << "\n";
std::cout << "Order using middle policy\n";
CGAL::spatial_sort( indices.begin(),
indices.end(),
Search_traits_3(CGAL::make_property_map(points)),
CGAL::Hilbert_sort_middle_policy());
for (std::size_t i : indices)
std::cout << points[i] << "\n";
std::cout << "done" << std::endl;
return 0;
}
CGAL::Spatial_sort_traits_adapter_3
Given a property map associating a key to a point, the class Spatial_sort_traits_adapter_3 induces a ...
Definition: Spatial_sort_traits_adapter_3.h:20
Kernel::Point_3
CGAL::spatial_sort
void spatial_sort(InputPointIterator begin, InputPointIterator end, const Traits &traits=Default_traits, PolicyTag policy=Default_policy, std::ptrdiff_t threshold_hilbert=default, std::ptrdiff_t threshold_multiscale=default, double ratio=default)
The function spatial_sort() sorts an iterator range of points in a way that improves space locality.
Kernel
CGAL::Hilbert_policy
Hilbert_policy is a policy class which can be used to parameterize a strategy policy in order to spec...
Definition: Hilbert_policy_tags.h:56
CGAL::Simple_cartesian