CGAL 5.6.3 - Point Set Processing

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Point_set_processing_3/read_write_xyz_point_set_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/property_map.h>
#include <CGAL/IO/read_xyz_points.h>
#include <CGAL/IO/write_xyz_points.h>
#include <utility> // defines std::pair
#include <vector>
#include <fstream>
#include <iostream>
// types
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef Kernel::Point_3 Point;
typedef Kernel::Vector_3 Vector;
// Point with normal vector stored as a std::pair.
typedef std::pair<Point, Vector> Pwn;
int main(int argc, char*argv[])
{
const std::string fname = (argc>1) ? argv[1] : CGAL::data_file_path("points_3/oni.pwn");
// Reads a .xyz point set file in points[].
// Note: read_points() requires an output iterator
// over points and as well as property maps to access each
// point position and normal.
std::vector<Pwn> points;
if(!CGAL::IO::read_XYZ(fname,
std::back_inserter(points),
CGAL::parameters::point_map(CGAL::First_of_pair_property_map<Pwn>())
.normal_map(CGAL::Second_of_pair_property_map<Pwn>())))
{
std::cerr << "Error: cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
// Saves point set.
// Note: write_XYZ() requires property maps to access each
// point position and normal.
if(!CGAL::IO::write_XYZ("oni_copy.xyz", points,
CGAL::parameters::point_map(CGAL::First_of_pair_property_map<Pwn>())
.normal_map(CGAL::Second_of_pair_property_map<Pwn>())
.stream_precision(17)))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
Kernel::Point_3
Kernel::Vector_3
CGAL::IO::write_XYZ
bool write_XYZ(std::ostream &os, const PointRange &points, const NamedParameters &np=parameters::default_values())
writes the range of points (positions + normals, if available), using the XYZ File Format.
Definition: write_xyz_points.h:125
Kernel
CGAL::First_of_pair_property_map
CGAL::Second_of_pair_property_map