CGAL 6.2 - Optimal Bounding Box

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Optimal_bounding_box/obb_with_point_maps_example.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/optimal_bounding_box.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <array>
#include <fstream>
#include <iostream>
#include <map>
#include <unordered_map>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef K::Point_3 Point;
typedef K::Vector_3 Vector;
typedef CGAL::Surface_mesh<Point> Surface_mesh;
typedef boost::graph_traits<Surface_mesh>::vertex_descriptor vertex_descriptor;
namespace CP = CGAL::parameters;
int main(int argc, char** argv)
{
const std::string filename = (argc > 1) ? argv[1] : CGAL::data_file_path("meshes/pig.off");
Surface_mesh sm;
if(!CGAL::Polygon_mesh_processing::IO::read_polygon_mesh(filename, sm) || sm.is_empty())
{
std::cerr << "Invalid input file." << std::endl;
return EXIT_FAILURE;
}
// a typical call
std::array<Point, 8> obb_points;
CGAL::oriented_bounding_box(sm, obb_points);
// one can associate positions to the vertices of the mesh without changing the mesh
std::unordered_map<vertex_descriptor, Point> translated_positions;
for(const vertex_descriptor& v : vertices(sm))
translated_positions[v] = sm.point(v) + Vector(1, 2, 3);
CGAL::oriented_bounding_box(sm, obb_points,
CP::vertex_point_map(boost::make_assoc_property_map(translated_positions)));
// using a range of points
std::vector<Point> points;
for(const vertex_descriptor& v : vertices(sm))
points.push_back(sm.point(v));
CGAL::oriented_bounding_box(points, obb_points);
// one can associate positions to the range without changing the range
std::map<Point, Point> scaled_positions;
for(const Point& p : points)
scaled_positions[p] = p + (p - CGAL::ORIGIN);
CGAL::oriented_bounding_box(points, obb_points,
CP::point_map(boost::make_assoc_property_map(scaled_positions)));
return EXIT_SUCCESS;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Surface_mesh
CGAL::oriented_bounding_box
void oriented_bounding_box(const PointRange &points, Output &out, const NamedParameters &np=parameters::default_values())
The function oriented_bounding_box() computes an approximation of the optimal bounding box,...
Definition: oriented_bounding_box.h:318
CGAL::ORIGIN
const CGAL::Origin ORIGIN
CGAL::parameters
optimal_bounding_box.h
Convenience header file including the headers for all the classes and functions of this package.