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#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Surface_mesh.h>
#include <CGAL/AABB_tree.h>
#include <CGAL/AABB_traits_3.h>
#include <CGAL/AABB_face_graph_triangle_primitive.h>
#include <CGAL/optimal_bounding_box.h>
#include <CGAL/Polygon_mesh_processing/IO/polygon_mesh_io.h>
#include <boost/property_map/function_property_map.hpp>
#include <fstream>
#include <iostream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef K::Point_3 Point;
typedef K::Aff_transformation_3 Aff_transformation;
typedef CGAL::Surface_mesh<Point> Surface_mesh;
typedef boost::graph_traits<Surface_mesh>::vertex_descriptor vertex_descriptor;
struct Aff_tr_fct
{
Aff_tr_fct() : m_at(nullptr), m_sm(nullptr) { }
Aff_tr_fct(const Aff_transformation& at, const Surface_mesh& sm) : m_at(&at), m_sm(&sm) { }
Point operator()(const vertex_descriptor v) const { return m_at->transform(m_sm->point(v)); }
private:
const Aff_transformation* m_at;
const Surface_mesh* m_sm;
};
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;
}
// get the transformation that yields the optimal bounding box
Aff_transformation at;
CGAL::oriented_bounding_box(sm, at);
// functor to apply the affine transformation to a vertex of the mesh
Aff_tr_fct aff_tr_fct(at, sm);
auto aff_tr_vpm = boost::make_function_property_map<vertex_descriptor>(aff_tr_fct);
// rotated AABB tree
typedef CGAL::AABB_face_graph_triangle_primitive<Surface_mesh, decltype(aff_tr_vpm)> AABB_face_graph_primitive;
typedef CGAL::AABB_traits_3<K, AABB_face_graph_primitive> AABB_face_graph_traits;
CGAL::AABB_tree<AABB_face_graph_traits> tree(faces(sm).begin(), faces(sm).end(), sm, aff_tr_vpm);
return EXIT_SUCCESS;
}
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