\( \newcommand{\E}{\mathrm{E}} \) \( \newcommand{\A}{\mathrm{A}} \) \( \newcommand{\R}{\mathrm{R}} \) \( \newcommand{\N}{\mathrm{N}} \) \( \newcommand{\Q}{\mathrm{Q}} \) \( \newcommand{\Z}{\mathrm{Z}} \) \( \def\ccSum #1#2#3{ \sum_{#1}^{#2}{#3} } \def\ccProd #1#2#3{ \sum_{#1}^{#2}{#3} }\)
CGAL 4.7 - 3D Triangulations
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Triangulation_3/parallel_insertion_and_removal_in_regular_3.cpp
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Regular_triangulation_3.h>
#include <CGAL/Regular_triangulation_euclidean_traits_3.h>
#include <CGAL/point_generators_3.h>
#include <iostream>
#include <fstream>
#include <vector>
int main()
{
#ifdef CGAL_LINKED_WITH_TBB
typedef Traits::Bare_point Point;
// Regular T3
typedef Rt::Vertex_handle Vertex_handle;
const int NUM_INSERTED_POINTS = 5000;
CGAL::Random_points_in_cube_3<Point> rnd(1.);
// Construction from a vector of 1,000,000 points
std::vector<Point> V;
V.reserve(NUM_INSERTED_POINTS);
for (int i = 0; i != NUM_INSERTED_POINTS; ++i)
V.push_back(*rnd++);
// Construct the locking data-structure, using the bounding-box of the points
Rt::Lock_data_structure locking_ds(
CGAL::Bbox_3(-1., -1., -1., 1., 1., 1.), 50);
// Contruct the triangulation in parallel
std::cerr << "Construction and insertion" << std::endl;
Rt rtr(V.begin(), V.end(), &locking_ds);
assert(rtr.is_valid());
std::cerr << "Remove" << std::endl;
// Remove the first 1/10 vertices
std::vector<Vertex_handle> vertices_to_remove;
Rt::Finite_vertices_iterator vit = rtr.finite_vertices_begin();
for (int i = 0 ; i < NUM_INSERTED_POINTS/10 ; ++i)
vertices_to_remove.push_back(vit++);
// Parallel remove
rtr.remove(vertices_to_remove.begin(), vertices_to_remove.end());
assert(rtr.is_valid());
#endif //CGAL_LINKED_WITH_TBB
return 0;
}