CGAL 5.2.2 - 3D Point Set
Point_set_3/point_set_read_ply.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Point_set_3.h>
#include <CGAL/Point_set_3/IO.h>
#include <fstream>
#include <limits>
typedef Kernel::FT FT;
typedef Kernel::Point_3 Point;
typedef Kernel::Vector_3 Vector;
typedef CGAL::Point_set_3<Point> Point_set;
int main (int argc, char** argv)
{
std::ifstream f (argc > 1 ? argv[1] : "data/example.ply",
std::ios_base::binary); // Mandatory on Windows if input is binary PLY
Point_set point_set;
if (!f || !CGAL::read_ply_point_set (f, point_set)) // same as `f >> point_set`
{
std::cerr << "Can't read input file " << std::endl;
}
// Shows which properties are defined
std::vector<std::string> properties = point_set.properties();
std::cerr << "Properties:" << std::endl;
for (std::size_t i = 0; i < properties.size(); ++ i)
std::cerr << " * " << properties[i] << std::endl;
// Recover "label" property of type int
Point_set::Property_map<boost::int32_t> label_prop;
bool found = false;
boost::tie (label_prop, found) = point_set.property_map<boost::int32_t> ("label");
if (found)
{
std::cerr << "Point set has an integer \"label\" property with values:" << std::endl;
for (Point_set::iterator it = point_set.begin(); it != point_set.end(); ++ it)
std::cerr << " * " << label_prop[*it] << std::endl;
}
if (argc > 2 && strcmp (argv[2], "-b") == 0) // Optional binary output
{
std::ofstream out ("out.ply",
std::ios_base::binary); // Mandatory on Windows
CGAL::set_binary_mode (out); // Select binary mode (ASCII is default)
out << point_set; // same as `CGAL::write_ply_point_set (out, point_set)`
}
else // ASCII output
{
std::ofstream out ("out.ply");
out.precision(17); // Use sufficient precision in ASCII
CGAL::write_ply_point_set (out, point_set); // same as `out << point_set`
}
return 0;
}