CGAL 6.0.1 - 3D Mesh Generation
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CGAL::Polyhedral_complex_mesh_domain_3< IGT, Polyhedron > Class Template Reference

#include <CGAL/Polyhedral_complex_mesh_domain_3.h>

Inherits from

CGAL::Mesh_domain_with_polyline_features_3< MD >.

Definition

template<class IGT, class Polyhedron = typename Mesh_polyhedron_3<IGT>::type>
class CGAL::Polyhedral_complex_mesh_domain_3< IGT, Polyhedron >

The class Polyhedral_complex_mesh_domain_3 implements a domain defined by a collection of polyhedral surfaces, forming a complex.

The constraints on the complex are:

  • a polyhedral surface of the complex cannot self-intersect,
  • two polyhedral surfaces of the complex are either disjoint, or share a subset of their border edges.

It is a model of the concept MeshDomainWithFeatures_3. It also provides a member function to automatically detect sharp features and boundaries from the input polyhedral surface(s).

The union of the polyhedral surfaces is a non-manifold surface, called the 2D surface of the domain. It is locally manifold, with or without borders, but at the intersections of polyhedral surfaces.

The complement of the 2D surface is decomposed into:

  • zero, one, or many sub-domains of the mesh domain,
  • plus the exterior of the mesh domain.

If the domain has sub-domains, each one must be the union of one or many connected components of the complement of the 2D surface. The sub-domains have indices, of integral type Subdomain_index, and the exterior of the mesh domain is associated with the subdomain index 0, like for any mesh domain in CGAL.

Each polyhedral surface is oriented, and has two sides. The positive side is union of the positive side of all of its facets, usually named the "exterior" of the surface. The negative side is the other side. The use of Polyhedral_complex_mesh_domain_3 assumes that for each polyhedral surface, the sub-domain indices on both sides are known.

Template Parameters
Polyhedronstands for the type of the input polyhedral surface(s), model of FaceListGraph.
IGTstands for a geometric traits class providing the types and functors required to implement the intersection tests and intersection computations for polyhedral boundary surfaces. This parameter has to be instantiated with a model of the concept IntersectionGeometricTraits_3.
Is model of
MeshDomainWithFeatures_3
See also
CGAL::make_mesh_3()
CGAL::Mesh_domain_with_polyline_features_3<MD>
CGAL::Polyhedral_mesh_domain_3<Polyhedron,IGT>
CGAL::Mesh_polyhedron_3<IGT>
Examples
Mesh_3/mesh_polyhedral_complex.cpp, and Mesh_3/mesh_polyhedral_complex_sm.cpp.

Public Member Functions

void detect_features (FT angle_bound=FT(60))
 detects sharp features and boundaries of the polyhedral components of the complex (including potential internal polyhedra), and inserts them as features of the domain.
 
void detect_borders ()
 detects border edges of the polyhedral components of the complex, and inserts them as features of the domain.
 
- Public Member Functions inherited from CGAL::Mesh_domain_with_polyline_features_3< MD >
template<typename ... T>
 Mesh_domain_with_polyline_features_3 (const T &...o)
 
 Mesh_domain_with_polyline_features_3 (const Mesh_domain_with_polyline_features_3 &)=default
 
template<typename InputIterator >
void add_features (InputIterator first, InputIterator end)
 adds 1-dimensional features in the domain.
 
template<typename InputIterator , typename PolylinePMap , typename IncidentPatchesIndicesPMap >
void add_features_and_incidences (InputIterator first, InputIterator end, PolylinePMap polyline_pmap, IncidentPatchesIndicesPMap incident_patches_indices_pmap)
 adds 1-dimensional features (curves) from the range [first, end) in the domain with their incidences with 2-dimensional features (patches) of the domain.
 
template<typename OutputIterator >
OutputIterator get_corners (OutputIterator out) const
 implements MeshDomainWithFeatures_3::get_corners().
 
template<typename OutputIterator >
OutputIterator get_curves (OutputIterator out) const
 implements MeshDomainWithFeatures_3::get_curves().
 
FT curve_segment_length (const Point_3 &p, const Point_3 q, const Curve_index &curve_index, CGAL::Orientation orientation) const
 implements MeshDomainWithFeatures_3::curve_segment_length().
 
FT curve_length (const Curve_index &curve_index) const
 implements MeshDomainWithFeatures_3::curve_length().
 
Point_3 construct_point_on_curve (const Point_3 &starting_point, const Curve_index &curve_index, FT distance) const
 implements MeshDomainWithFeatures_3::construct_point_on_curve().
 
CGAL::Sign distance_sign_along_loop (const Point_3 &p, const Point_3 &q, const Point_3 &r, const Curve_index &index) const
 implements MeshDomainWithFeatures_3::distance_sign_along_loop().
 
CGAL::Sign distance_sign (const Point_3 &p, const Point_3 &q, const Curve_index &index) const
 implements MeshDomainWithFeatures_3::distance_sign().
 
bool is_loop (const Curve_index &index) const
 implements MeshDomainWithFeatures_3::is_loop().
 
bool is_curve_segment_covered (const Curve_index &index, CGAL::Orientation orientation, const Point_3 &c1, const Point_3 &c2, const FT sq_r1, const FT sq_r2) const
 implements MeshDomainWithFeatures_3::is_curve_segment_covered().
 
Index index_from_surface_patch_index (const Surface_patch_index &index) const
 Returns the index to be stored in a vertex lying on the surface identified by index.
 
Index index_from_subdomain_index (const Subdomain_index &index) const
 Returns the index to be stored in a vertex lying in the subdomain identified by index.
 
Index index_from_curve_index (const Curve_index &index) const
 returns an Index from a Curve_index
 
Index index_from_corner_index (const Corner_index &index) const
 returns an Index from a Corner_index
 
Surface_patch_index surface_patch_index (const Index &index) const
 Returns the Surface_patch_index of the surface patch where lies a vertex with dimension 2 and index index.
 
Subdomain_index subdomain_index (const Index &index) const
 Returns the index of the subdomain containing a vertex with dimension 3 and index index.
 
Curve_index curve_index (const Index &index) const
 returns a Curve_index from an Index
 
Corner_index corner_index (const Index &index) const
 returns a Corner_index from an Index
 

Creation

template<typename InputPolyhedraIterator , typename InputPairOfSubdomainIndicesIterator >
 Polyhedral_complex_mesh_domain_3 (InputPolyhedraIterator begin, InputPolyhedraIterator end, InputPairOfSubdomainIndicesIterator indices_begin, InputPairOfSubdomainIndicesIterator indices_end)
 constructs a domain defined by a set of polyhedral surfaces, describing a polyhedral complex.
 

Additional Inherited Members

- Public Types inherited from CGAL::Mesh_domain_with_polyline_features_3< MD >
typedef MD::Surface_patch_index Surface_patch_index
 
typedef MD::Subdomain_index Subdomain_index
 
typedef int Curve_index
 
typedef int Corner_index
 
typedef unspecified_type Index
 
typedef CGAL::Tag_true Has_features
 
typedef MD::R::FT FT
 

Constructor & Destructor Documentation

◆ Polyhedral_complex_mesh_domain_3()

template<class IGT , class Polyhedron = typename Mesh_polyhedron_3<IGT>::type>
template<typename InputPolyhedraIterator , typename InputPairOfSubdomainIndicesIterator >
CGAL::Polyhedral_complex_mesh_domain_3< IGT, Polyhedron >::Polyhedral_complex_mesh_domain_3 ( InputPolyhedraIterator  begin,
InputPolyhedraIterator  end,
InputPairOfSubdomainIndicesIterator  indices_begin,
InputPairOfSubdomainIndicesIterator  indices_end 
)

constructs a domain defined by a set of polyhedral surfaces, describing a polyhedral complex.

Parameters
beginfirst iterator on the input polyhedral surfaces
endpast the end iterator on the input polyhedral surfaces
indices_beginfirst iterator on the pairs of subdomain indices (two subdomain indices per input polyhedral surface), corresponding to the first input polyhedral surface. Each pair should be ordered as follows : the first (resp. second) element is the index of the subdomain that lies on the positively oriented (resp. negatively oriented) side of the corresponding input polyhedral surface.
indices_endpast the end iterator on the pairs of subdomain indices
Template Parameters
InputPolyhedraIteratormodel of ForwardIterator, holding Polyhedron's
InputPairOfSubdomainIndicesIteratormodel of ForwardIterator, holding std::pair<Subdomain_index, Subdomain_index>
Precondition
std::distance(begin, end) == std::distance(indices_begin, indices_end)

Member Function Documentation

◆ detect_borders()

template<class IGT , class Polyhedron = typename Mesh_polyhedron_3<IGT>::type>
void CGAL::Polyhedral_complex_mesh_domain_3< IGT, Polyhedron >::detect_borders ( )

detects border edges of the polyhedral components of the complex, and inserts them as features of the domain.

This function should only be called alone, and not before or after detect_features().

◆ detect_features()

template<class IGT , class Polyhedron = typename Mesh_polyhedron_3<IGT>::type>
void CGAL::Polyhedral_complex_mesh_domain_3< IGT, Polyhedron >::detect_features ( FT  angle_bound = FT(60))

detects sharp features and boundaries of the polyhedral components of the complex (including potential internal polyhedra), and inserts them as features of the domain.

angle_bound gives the maximum angle (in degrees) between the two normal vectors of adjacent triangles. For an edge of the polyhedron, if the angle between the two normal vectors of its incident facets is bigger than the given bound, then the edge is considered as a feature edge, and inserted as a feature of the domain.