CGAL 6.1.1 - Fast Intersection and Distance Computation (AABB Tree)

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AABB_tree/AABB_insertion_example.cpp
#include <iostream>
#include <CGAL/Simple_cartesian.h>
#include <CGAL/AABB_tree.h>
#include <CGAL/AABB_traits_3.h>
#include <CGAL/Polyhedron_3.h>
#include <CGAL/AABB_face_graph_triangle_primitive.h>
typedef CGAL::Simple_cartesian<double> K;
typedef K::FT FT;
typedef K::Point_3 Point;
typedef K::Segment_3 Segment;
typedef CGAL::Polyhedron_3<K> Polyhedron;
typedef CGAL::AABB_face_graph_triangle_primitive<Polyhedron, CGAL::Default, CGAL::Tag_false> Primitive;
typedef CGAL::AABB_traits_3<K, Primitive> Traits;
typedef CGAL::AABB_tree<Traits> Tree;
typedef Tree::Point_and_primitive_id Point_and_primitive_id;
int main()
{
Point p(1.0, 0.0, 0.0);
Point q(0.0, 1.0, 0.0);
Point r(0.0, 0.0, 1.0);
Point s(0.0, 0.0, 0.0);
Polyhedron polyhedron1;
polyhedron1.make_tetrahedron(p, q, r, s);
Point p2(11.0, 0.0, 0.0);
Point q2(10.0, 1.0, 0.0);
Point r2(10.0, 0.0, 1.0);
Point s2(10.0, 0.0, 0.0);
Polyhedron polyhedron2;
polyhedron2.make_tetrahedron(p2, q2, r2, s2);
// constructs AABB tree and computes internal KD-tree
// data structure to accelerate distance queries
Tree tree(faces(polyhedron1).first, faces(polyhedron1).second, polyhedron1);
tree.insert(faces(polyhedron2).first, faces(polyhedron2).second, polyhedron2);
// query point
Point query(0.0, 0.0, 3.0);
// computes squared distance from query
FT sqd = tree.squared_distance(query);
std::cout << "squared distance: " << sqd << std::endl;
return EXIT_SUCCESS;
}
CGAL::AABB_face_graph_triangle_primitive
Primitive type for a facet of a polyhedral surface.
Definition: AABB_face_graph_triangle_primitive.h:75
CGAL::AABB_traits_3
This traits class handles any type of 3D geometric primitives provided that the proper intersection t...
Definition: AABB_traits_3.h:172
CGAL::AABB_tree
Static data structure for efficient intersection and distance computations in 2D and 3D.
Definition: AABB_tree.h:57
CGAL::Polyhedron_3
CGAL::Simple_cartesian