CGAL 6.2 - Intersecting Sequences of dD Iso-oriented Boxes: Box_intersection_d/triangle_self_intersect_pointers.cpp

CGAL 6.2 - Intersecting Sequences of dD Iso-oriented Boxes

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Box_intersection_d/triangle_self_intersect_pointers.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/box_intersection_d.h>
#include <vector>
#include <fstream>
typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
typedef Kernel::Point_3 Point_3;
typedef Kernel::Triangle_3 Triangle_3;
typedef std::vector<Triangle_3> Triangles;
typedef Triangles::iterator Iterator;
typedef CGAL::Box_intersection_d::Box_with_handle_d<double,3,Iterator> Box;
struct Report {
Triangles* triangles;
Report(Triangles& triangles)
: triangles(&triangles)
{}
// callback functor that reports all truly intersecting triangles
void operator()(const Box* a, const Box* b) const
{
std::cout << "Box " << (a->handle() - triangles->begin()) << " and "
<< (b->handle() - triangles->begin()) << " intersect";
if ( ! a->handle()->is_degenerate() && ! b->handle()->is_degenerate()
&& CGAL::do_intersect( *(a->handle()), *(b->handle()))) {
std::cout << ", and the triangles intersect also";
}
std::cout << '.' << std::endl;
}
};
int main(int argc, char*argv[])
{
std::ifstream in((argc>1)?argv[1]:CGAL::data_file_path("points_3/triangles.xyz"));
Triangles triangles;
Triangle_3 t;
while(in >> t){
triangles.push_back(t);
}
// Create the corresponding vector of bounding boxes
std::vector<Box> boxes;
for ( Iterator i = triangles.begin(); i != triangles.end(); ++i)
boxes.push_back( Box( i->bbox(), i));
// Create the corresponding vector of pointers to bounding boxes
std::vector<Box *> ptr;
for ( std::vector<Box>::iterator i = boxes.begin(); i != boxes.end(); ++i)
ptr.push_back( &*i);
// Run the self intersection algorithm with all defaults on the
// indirect pointers to bounding boxes. Avoids copying the boxes.
CGAL::box_self_intersection_d( ptr.begin(), ptr.end(), Report(triangles));
return 0;
}
CGAL::Box_intersection_d::Box_with_handle_d
Box_with_handle_d is a generic iso-oriented bounding box in dimension that stores additionally a han...
Definition: Box_with_handle_d.h:67
CGAL::Exact_predicates_inexact_constructions_kernel
Iterator
Kernel::Point_3
Kernel::Triangle_3
CGAL::box_self_intersection_d
void box_self_intersection_d(RandomAccessIterator begin, RandomAccessIterator end, Callback callback, std::ptrdiff_t cutoff=10, CGAL::Box_intersection_d::Topology topology=CGAL::Box_intersection_d::CLOSED)
Invocation of box intersection with default box traits Box_intersection_d::Box_traits_d<Box_handle>,...
CGAL::do_intersect
bool do_intersect(Type1< Kernel > obj1, Type2< Kernel > obj2)
Kernel