CGAL 6.1.1 - Point Set Processing

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Point_set_processing_3/edge_aware_upsample_point_set_example.cpp
#include <CGAL/Simple_cartesian.h>
#include <CGAL/edge_aware_upsample_point_set.h>
#include <CGAL/IO/read_points.h>
#include <CGAL/IO/write_points.h>
#include <vector>
#include <fstream>
// types
typedef CGAL::Simple_cartesian<double> Kernel;
typedef Kernel::Point_3 Point;
typedef Kernel::Vector_3 Vector;
// Point with normal vector stored in a std::pair.
typedef std::pair<Point, Vector> PointVectorPair;
// Concurrency
typedef CGAL::Parallel_if_available_tag Concurrency_tag;
int main(int argc, char* argv[])
{
const std::string input_filename = (argc>1) ? argv[1] : CGAL::data_file_path("points_3/before_upsample.xyz");
const char* output_filename = (argc>2) ? argv[2] : "data/before_upsample_UPSAMPLED.xyz";
// Reads a .xyz point set file in points[], *with normals*.
std::vector<PointVectorPair> points;
if(!CGAL::IO::read_points(input_filename,
std::back_inserter(points),
CGAL::parameters::point_map(CGAL::First_of_pair_property_map<PointVectorPair>())
.normal_map(CGAL::Second_of_pair_property_map<PointVectorPair>())))
{
std::cerr << "Error: cannot read file " << input_filename << std::endl;
return EXIT_FAILURE;
}
//Algorithm parameters
const double sharpness_angle = 25; // control sharpness of the result.
const double edge_sensitivity = 0; // higher values will sample more points near the edges
const double neighbor_radius = 0.25; // initial size of neighborhood.
const std::size_t number_of_output_points = points.size() * 4;
//Run algorithm
CGAL::edge_aware_upsample_point_set<Concurrency_tag>(
points,
std::back_inserter(points),
CGAL::parameters::point_map(CGAL::First_of_pair_property_map<PointVectorPair>()).
normal_map(CGAL::Second_of_pair_property_map<PointVectorPair>()).
sharpness_angle(sharpness_angle).
edge_sensitivity(edge_sensitivity).
neighbor_radius(neighbor_radius).
number_of_output_points(number_of_output_points));
// Saves point set.
if(!CGAL::IO::write_points(output_filename, points,
CGAL::parameters::point_map(CGAL::First_of_pair_property_map<PointVectorPair>())
.normal_map(CGAL::Second_of_pair_property_map<PointVectorPair>())
.stream_precision(17)))
return EXIT_FAILURE;
return EXIT_SUCCESS;
}
Kernel::Point_3
Kernel::Vector_3
CGAL::IO::write_points
bool write_points(const std::string &fname, const PointRange &points, const NamedParameters &np=parameters::default_values(),)
writes the range of points with properties to a file.
Definition: write_points.h:92
CGAL::IO::read_points
bool read_points(const std::string &fname, PointOutputIterator output, const NamedParameters &np=parameters::default_values())
reads the point set from an input file.
Definition: read_points.h:89
Kernel
CGAL::First_of_pair_property_map
CGAL::Parallel_if_available_tag
CGAL::Second_of_pair_property_map
CGAL::Simple_cartesian