CGAL 6.1 - 3D Mesh Generation

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Mesh_3/mesh_3D_image_with_detection_of_features.cpp
#include <vector>
#include <iostream>
#include <CGAL/Mesh_triangulation_3.h>
#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
#include <CGAL/Mesh_criteria_3.h>
#include <CGAL/make_mesh_3.h>
#include <CGAL/Image_3.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Mesh_domain_with_polyline_features_3.h>
#include <CGAL/Labeled_mesh_domain_3.h>
typedef CGAL::Exact_predicates_inexact_constructions_kernel K;
typedef CGAL::Labeled_mesh_domain_3<K> Image_domain;
typedef CGAL::Mesh_domain_with_polyline_features_3<Image_domain> Mesh_domain;
#include <CGAL/Mesh_3/Detect_features_in_image.h>
#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;
// To avoid verbose function and named parameters call
namespace params = CGAL::parameters;
int main(int argc, char* argv[])
{
const std::string fname = (argc>1)?argv[1]:CGAL::data_file_path("images/420.inr");
CGAL::Image_3 image;
if(!image.read(fname)){
std::cerr << "Error: Cannot read file " << fname << std::endl;
return EXIT_FAILURE;
}
Mesh_domain domain
= Mesh_domain::create_labeled_image_mesh_domain(image,
params::features_detector = CGAL::Mesh_3::Detect_features_in_image());
CGAL::Bbox_3 bbox = domain.bbox();
double diag = CGAL::sqrt(CGAL::square(bbox.xmax() - bbox.xmin()) +
CGAL::square(bbox.ymax() - bbox.ymin()) +
CGAL::square(bbox.zmax() - bbox.zmin()));
double sizing_default = diag * 0.05;
Mesh_criteria criteria(params::edge_size = sizing_default,
params::facet_angle = 30,
params::facet_size = sizing_default,
params::facet_distance = sizing_default / 10,
params::facet_topology = CGAL::FACET_VERTICES_ON_SAME_SURFACE_PATCH,
params::cell_radius_edge_ratio = 0,
params::cell_size = 0
);
C3t3 c3t3 = CGAL::make_mesh_3<C3t3>(domain, criteria,
params::no_exude(),
params::no_perturb());
// Output
CGAL::dump_c3t3(c3t3, "out");
return 0;
}
CGAL::Bbox_3
CGAL::Bbox_3::ymin
double ymin() const
CGAL::Bbox_3::xmax
double xmax() const
CGAL::Bbox_3::zmin
double zmin() const
CGAL::Bbox_3::zmax
double zmax() const
CGAL::Bbox_3::ymax
double ymax() const
CGAL::Bbox_3::xmin
double xmin() const
CGAL::Exact_predicates_inexact_constructions_kernel
CGAL::Image_3
The class Image_3 is a C++ wrapper around the InrImage library.
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:354
CGAL::Mesh_complex_3_in_triangulation_3
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
CGAL::Mesh_domain_with_polyline_features_3
The class Mesh_domain_with_polyline_features_3 enables the user to add some 0- and 1-dimensional feat...
Definition: Mesh_domain_with_polyline_features_3.h:535
unspecified_type
CGAL::square
NT square(const NT &x)
CGAL::sqrt
NT sqrt(const NT &x)
CGAL::FACET_VERTICES_ON_SAME_SURFACE_PATCH
@ FACET_VERTICES_ON_SAME_SURFACE_PATCH
The three vertices of a facet belonging to a surface patch s have to be on the same surface patch s,...
Definition: Mesh_facet_topology.h:38
CGAL::parameters
CGAL::Mesh_3::Detect_features_in_image
Functor for feature detection in labeled images.
Definition: Detect_features_in_image.h:263
CGAL::Parallel_tag
CGAL::Sequential_tag