CGAL users discussion list

[Wolfram Bosbach <>]

Hi

I am using CGAL for transferring surface meshes into volume meshes.

I have made the experience that sometimes during the CGAL transformation individual bodies can disappear.

My code:

############################################################################################################

#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/Polyhedral_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/refine_mesh_3.h>

// IO
#include <CGAL/IO/Polyhedron_iostream.h>

// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Polyhedron_3<K> Polyhedron;
typedef CGAL::Polyhedral_mesh_domain_3<Polyhedron, K> Mesh_domain;

// Triangulation
typedef CGAL::Mesh_triangulation_3<Mesh_domain>::type Tr;
typedef CGAL::Mesh_complex_3_in_triangulation_3<Tr> C3t3;

// Criteria
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;

// To avoid verbose function and named parameters call
using namespace CGAL::parameters;

int main()
{
  // Create input polyhedron
  Polyhedron polyhedron;
  std::ifstream input("444.surface.cgal");
  input >> polyhedron;
  
  // Create domain
  Mesh_domain domain(polyhedron);
 
  // Mesh criteria (no cell_size set)
  Mesh_criteria criteria(facet_angle=10, facet_size=1, facet_distance=1,
                         cell_radius_edge_ratio=10, cell_size=1);
 
  // Mesh generation
  C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria, no_lloyd(), no_odt(), no_perturb(), no_exude());

  // Output
  std::ofstream medit_file("444v3.volume.cgal");
  c3t3.output_to_medit(medit_file);
  medit_file.close();

  return 0;
}

############################################################################################################

Has this ever happened before to anybody?

Kind regards

Wolfram

Wolfram Bosbach
PhD Student

Engineering for Life Sciences Group
University of Cambridge, Department of Engineering
Trumpington Street
Cambridge CB2 1PZ
United Kingdom

Tel: 0044 1223 7 48524
Fax: 0044 1223 3 32662
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