CGAL 6.2 - 3D Mesh Generation

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Mesh_3/mesh_3D_image_variable_size.cpp
#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_constant_domain_field_3.h>
#include <CGAL/Labeled_mesh_domain_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/Image_3.h>
// Domain
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Labeled_mesh_domain_3<K> Mesh_domain;
#ifdef CGAL_CONCURRENT_MESH_3
typedef CGAL::Parallel_tag Concurrency_tag;
#else
typedef CGAL::Sequential_tag Concurrency_tag;
#endif
// Triangulation
typedef CGAL::Mesh_triangulation_3<Mesh_domain,CGAL::Default,Concurrency_tag>::type Tr;
typedef CGAL::Mesh_complex_3_in_triangulation_3<Tr> C3t3;
// Criteria
typedef CGAL::Mesh_criteria_3<Tr> Mesh_criteria;
typedef CGAL::Mesh_constant_domain_field_3<Mesh_domain::R,
Mesh_domain::Index> Sizing_field;
namespace params = CGAL::parameters;
int main(int argc, char* argv[])
{
const std::string fname = (argc>1)?argv[1]:CGAL::data_file_path("images/liver.inr.gz");
// Loads image
CGAL::Image_3 image;
if(!image.read(fname)){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
// Domain
Mesh_domain domain = Mesh_domain::create_labeled_image_mesh_domain(image);
// Sizing field: set global size to 8 and kidney size (label 127) to 3
double kidney_size = 3.;
int volume_dimension = 3;
Sizing_field size(8);
size.set_size(kidney_size, volume_dimension,
domain.index_from_subdomain_index(127));
// Mesh criteria
Mesh_criteria criteria(params::facet_angle(30).facet_size(6).facet_distance(2).
cell_radius_edge_ratio(3).cell_size(size));
// Meshing
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria);
// Output
std::ofstream medit_file("out.mesh");
CGAL::IO::write_MEDIT(medit_file, c3t3);
medit_file.close();
return 0;
}
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Image_3
The class Image_3 holds a shared pointer to a 3D image buffer.
Definition: Image_3.h:11
CGAL::Image_3::read
bool read(const char *file)
Open a 3D image file.
CGAL::Labeled_mesh_domain_3
The class Labeled_mesh_domain_3 implements indexed domains.
Definition: Labeled_mesh_domain_3.h:53
CGAL::Mesh_complex_3_in_triangulation_3
CGAL::Mesh_constant_domain_field_3
The class Mesh_constant_domain_field_3 is a model of concept MeshDomainField_3.
Definition: Mesh_constant_domain_field_3.h:51
CGAL::Mesh_criteria_3
The class gathers the refinement criteria for mesh tetrahedra and surface facets where surface facets...
Definition: Mesh_criteria_3.h:186
unspecified_type
CGAL::IO::write_MEDIT
void write_MEDIT(std::ostream &os, const T3 &t3, const NamedParameters &np=parameters::default_values())
CGAL::parameters
CGAL::Parallel_tag
CGAL::Sequential_tag