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[tang <>]

Dear all,

I used the latest CGAL 4.4 to run the following code and it hangs there.
Could anyone help me to take a look at it?


//******************************************************************************
// File Description :
// Outputs to out.mesh a mesh of implicit domains. These domains are defined
// by a vector of functions. Each n-uplet of sign of function values defines
a
// subdomain.
//******************************************************************************
#include <debug.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Mesh_triangulation_3.h>
#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
#include <CGAL/Mesh_criteria_3.h>
#include <CGAL/Mesh_3/Implicit_to_labeled_function_wrapper.h>
#include <CGAL/Mesh_3/Labeled_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include "implicit_functions.h"
// IO
#include <CGAL/IO/File_medit.h>
using namespace CGAL::parameters;
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef FT_to_point_function_wrapper<K::FT, K::Point_3> Function;
typedef CGAL::Mesh_3::Implicit_vector_to_labeled_function_wrapper<Function,
K>
Function_wrapper;
typedef Function_wrapper::Function_vector Function_vector;
typedef CGAL::Mesh_3::Labeled_mesh_domain_3<Function_wrapper, K>
Mesh_domain;
// Triangulation
typedef CGAL::Mesh_triangulation_3<Mesh_domain>::type Tr;
typedef CGAL::Mesh_complex_3_in_triangulation_3 C3t3;
// Mesh Criteria
typedef CGAL::Mesh_criteria_3 Mesh_criteria;
typedef Mesh_criteria::Facet_criteria Facet_criteria;
typedef Mesh_criteria::Cell_criteria Cell_criteria;
int main()
{
// Define functions
//Function f1(&torus_function);
//Function f2(&sphere_function<5>);
//Function f3(&sphere_function<2>);
        Function f1(&cube_function<-1,0,0,2>);
        Function f2(&cube_function<1,0,0,2>);
Function_vector v;
v.push_back(&f1);
v.push_back(&f2);
//v.push_back(&f3);
// Domain (Warning: Sphere_3 constructor uses square radius !)
Mesh_domain domain(v, K::Sphere_3(CGAL::ORIGIN, 5.*5.), 1e-6);
// Set mesh criteria
Facet_criteria facet_criteria(30, 0.2, 0.0001); // angle, size,
approximation
Cell_criteria cell_criteria(2., 0.4); // radius-edge ratio, size
Mesh_criteria criteria(facet_criteria, cell_criteria);
// Mesh generation
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, no_exude(),
no_perturb());
// Perturbation (maximum cpu time: 10s, targeted dihedral angle: default)
//CGAL::perturb_mesh_3(c3t3, domain, time_limit = 10);
// Exudation
//CGAL::exude_mesh_3(c3t3,12);
// Output
std::ofstream medit_file("out.mesh");
CGAL::output_to_medit(medit_file, c3t3);
return 0;
}

The function 'cube_function' is defined in 'implicit_functions.h' as
follows:

template <int x0,int y0,int z0,int r0>
double cube_function (double x, double y, double z) // (c=(x0,y0,z0),
r=Sq_radius)
{
        double r=r0/2.0;
  if( x-x0 < r && -(x-x0) < r &&
      y-y0 < r && -(y-y0) < r &&
      z-z0 < r && -(z-z0) < r )
    return -1.;
  return 1.;
}



Could anyone help me to take a look at it? Is there anything missed?

Thanks,
Tang Laoya 



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