CGAL 6.2 - Point Set Processing

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Point_set_processing_3/grid_simplification_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/grid_simplify_point_set.h>
#include <CGAL/IO/read_points.h>
#include <vector>
#include <fstream>
// types
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef Kernel::Point_3 Point;
int main(int argc, char*argv[])
{
const std::string fname = (argc>1) ? argv[1] : CGAL::data_file_path("points_3/oni.pwn");
// Reads a point set file in points[].
std::vector<Point> points;
if(!CGAL::IO::read_points(fname, std::back_inserter(points)))
{
std::cerr << "Error: cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
// simplification by clustering using erase-remove idiom
double cell_size = 0.03;
unsigned int min_points_per_cell = 3;
auto iterator_to_first_to_remove
= CGAL::grid_simplify_point_set
(points, cell_size,
CGAL::parameters::min_points_per_cell(min_points_per_cell)); // optional
points.erase(iterator_to_first_to_remove, points.end());
// Optional: after erase(), shrink_to_fit to trim excess capacity
points.shrink_to_fit();
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
Kernel::Point_3
CGAL::IO::read_points
bool read_points(const std::string &fname, PointOutputIterator output, const NamedParameters &np=parameters::default_values())
CGAL::grid_simplify_point_set
PointRange::iterator grid_simplify_point_set(PointRange &points, double epsilon, const NamedParameters &np=parameters::default_values())
Merges points which belong to the same cell of a grid of cell size = epsilon.
Definition: grid_simplify_point_set.h:235
Kernel