void run(const FaceGraph& graph){
typename Kernel::Point_3 p(0.2, 0.2, 0.2);
typename Kernel::Point_3 q(1.0, 1.0, 1.0);
// constructs the AABB tree and the internal search tree for
// efficient distance queries.
Tree tree( faces(graph).first, faces(graph).second, graph);
tree.accelerate_distance_queries();
// counts #intersections with a triangle query
Segment segment_query(p,q);
std::cout << tree.number_of_intersected_primitives(segment_query)
<< " intersections(s) with triangle" << std::endl;
assert( tree.number_of_intersected_primitives(segment_query)== 1 );
// computes the closest point from a query point
typename Kernel::Point_3 point_query(2.0, 2.0, 2.0);
typename Kernel::Point_3 closest = tree.closest_point(point_query);
std::cerr << "closest point is: " << closest << std::endl;
}
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);
Mesh m;
CGAL::make_tetrahedron(p, q, r, s, m);
// constructs AABB tree
Tree tree(faces(m).first, faces(m).second, m);
// constructs segment query
Point a(-0.2, 0.2, -0.2);
Point b(1.3, 0.2, 1.3);
Segment segment_query(a,b);
// tests intersections with segment query
if(tree.do_intersect(segment_query))
std::cout << "intersection(s)" << std::endl;
else
std::cout << "no intersection" << std::endl;
// computes #intersections with segment query
std::cout << tree.number_of_intersected_primitives(segment_query)
<< " intersection(s)" << std::endl;
// computes first encountered intersection with segment query
// (generally a point)
Segment_intersection intersection =
tree.any_intersection(segment_query);
if(intersection){
// gets intersection object
if(boost::get<Point>(&(intersection->first))){
Point* p = boost::get<Point>(&(intersection->first));
std::cout << "intersection object is a point " << *p << std::endl;
std::cout << "with face "<< intersection->second << std::endl;
}
}
// computes all intersections with segment query (as pairs object - primitive_id)
std::list<Segment_intersection> intersections;
tree.all_intersections(segment_query, std::back_inserter(intersections));
// computes all intersected primitives with segment query as primitive ids
std::list<Primitive_id> primitives;
tree.all_intersected_primitives(segment_query, std::back_inserter(primitives));
// constructs plane query
Point base(0.0,0.0,0.5);
Vector vec(0.0,0.0,1.0);
Plane plane_query(base,vec);
// computes first encountered intersection with plane query
// (generally a segment)
Plane_intersection plane_intersection = tree.any_intersection(plane_query);
if(plane_intersection){
if(boost::get<Segment>(&(plane_intersection->first))){
Segment* s = boost::get<Segment>(&(plane_intersection->first));
std::cout << "one intersection object is the segment " << s << std::endl;
std::cout << "with face "<< intersection->second << std::endl;
}
}
return EXIT_SUCCESS;
}
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 polyhedron;
polyhedron.make_tetrahedron(p, q, r, s);
// constructs AABB tree
Tree tree(polyhedron.facets_begin(),polyhedron.facets_end(),polyhedron);
// constructs segment query
Point a(-0.2, 0.2, -0.2);
Point b(1.3, 0.2, 1.3);
Segment segment_query(a,b);
// tests intersections with segment query
if(tree.do_intersect(segment_query))
std::cout << "intersection(s)" << std::endl;
else
std::cout << "no intersection" << std::endl;
// computes #intersections with segment query
std::cout << tree.number_of_intersected_primitives(segment_query)
<< " intersection(s)" << std::endl;
// computes first encountered intersection with segment query
// (generally a point)
Segment_intersection intersection =
tree.any_intersection(segment_query);
if(intersection)
{
// gets intersection object
if(boost::get<Point>(&(intersection->first)))
std::cout << "intersection object is a point" << std::endl;
}
// computes all intersections with segment query (as pairs object - primitive_id)
std::list<Segment_intersection> intersections;
tree.all_intersections(segment_query, std::back_inserter(intersections));
// computes all intersected primitives with segment query as primitive ids
std::list<Primitive_id> primitives;
tree.all_intersected_primitives(segment_query, std::back_inserter(primitives));
// constructs plane query
Vector vec(0.0,0.0,1.0);
Plane plane_query(a,vec);
// computes first encountered intersection with plane query
// (generally a segment)
Plane_intersection plane_intersection = tree.any_intersection(plane_query);
if(plane_intersection)
{
if(boost::get<Segment>(&(plane_intersection->first)))
std::cout << "intersection object is a segment" << std::endl;
}
return EXIT_SUCCESS;
}