CGAL 5.4  3D Mesh Generation

The concept MeshCellBase_3
describes the requirements for the Cell
type of the triangulation used in the 3D mesh generation process. The type MeshCellBase_3
refines the concept RegularTriangulationCellBaseWithWeightedCircumcenter_3
and must be copy constructible. The concept MeshCellBase_3
includes a way to store and retrieve if a given cell of the triangulation is inside the domain or not and which subdomain it belongs to in case of a multidomain.
Moreover, this concept adds four markers per cell to mark the facets of the triangulation that are surface facets, and four additional helper markers used in some operations to mark for instance the facets that have been visited.
This concept also provides storage for the centers of Delaunay surface balls. Each surface facet has a Delaunay surface ball, i. e. a circumscribing ball, centered on an input complex surface patch, and empty of triangulation vertices. In the following we call surface center of a surface facet, the center of its biggest Delaunay surface ball.
The optimizers also need this concept to provide readwrite access to two Cell_handle
called 'intrusive'.
For parallel algorithms, the functions related to facet access/modification must be concurrencysafe when several calls are made in parallel on different facets of the cell (e.g. calling set_facet_visited(0, true)
, set_facet_visited(2, true)
and is_facet_visited(1)
in parallel must be safe)
Moreover, the parallel algorithms require an erase counter in each cell (see below).
CGAL::Compact_mesh_cell_base_3<Gt,MD,Tds>
CGAL::Mesh_cell_base_3<Gt,MD,Cb>
Types  
typedef unspecified_type  Point_3 
The bare point type, required to match the Point_3 type of the 3D triangulation traits in which the mesh is embedded.  
typedef unspecified_type  Point 
The point type, required to match the Point type of the 3D triangulation in which the mesh is embedded.  
typedef unspecified_type  Subdomain_index 
Type of indices for cells of the input complex. More...  
typedef unspecified_type  Surface_patch_index 
Type of indices for surface patches of the input complex. More...  
typedef unspecified_type  Index 
Type of indices to be stored at mesh vertices to characterize the lowest dimensional face of the input complex on which a possible future Steiner vertex lies. More...  
Operations  
Subdomain_index  subdomain_index () 
Returns the index of the input subdomain that contains the cell cell of the triangulation.  
void  set_subdomain_index (Subdomain_index index) 
Sets the subdomain index of the cell.  
bool  is_facet_on_surface (int i) 
returns true iff facet(i) is a surface facet.  
Surface_patch_index  surface_patch_index (int i) 
returns Surface_patch_index of facet i .  
void  set_surface_patch_index (int i, Surface_patch_index index) 
sets Surface_patch_index of facet i to index .  
bool  is_facet_visited (int i) 
Returns true iff facet(i) has been visited.  
void  set_facet_visited (int i) 
Marks facet(i) as visited.  
void  reset_visited (int i) 
Marks facet(i) as nonvisited.  
const Point_3 &  get_facet_surface_center (int i) 
Returns a const reference to the surface center of facet(i) .  
void  set_facet_surface_center (int i, Point_3 p) 
Sets the point p as the surface center of facet(i) .  
void  set_facet_surface_center_index (int i, Index index) 
Sets the surface center index of facet(i) to index .  
Index  get_facet_surface_center_index (int i) 
Returns the surface center index of facet(i) .  
unsigned int  erase_counter () const 
Get the erase counter. More...  
void  set_erase_counter (unsigned int c) 
Sets the erase counter. More...  
void  increment_erase_counter () 
Increments the erase counter. More...  
Internal  
These functions are used internally by mesh optimizers. The class should provide storage, accessors and modificators for two  
Cell_handle  next_intrusive () const 
void  set_next_intrusive (Cell_handle) 
Cell_handle  previous_intrusive () const 
void  set_previous_intrusive (Cell_handle) 
Type of indices to be stored at mesh vertices to characterize the lowest dimensional face of the input complex on which a possible future Steiner vertex lies.
Must match the type MeshDomain_3::Index
.
Type of indices for cells of the input complex.
Must match the type MeshDomain_3::Subdomain_index
.
Type of indices for surface patches of the input complex.
Must match the type MeshDomain_3::Surface_patch_index
.
unsigned int MeshCellBase_3::erase_counter  (  )  const 
Get the erase counter.
Only required by the parallel algorithms. See CGAL::Compact_container
for more details.
void MeshCellBase_3::increment_erase_counter  (  ) 
Increments the erase counter.
Only required by the parallel algorithms. See CGAL::Compact_container
for more details.
void MeshCellBase_3::set_erase_counter  (  unsigned int  c  ) 
Sets the erase counter.
Only required by the parallel algorithms. See CGAL::Compact_container
for more details.