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CGAL 4.10 - 3D Mesh Generation
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CGAL 4.10 - 3D Mesh Generation
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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 RegularTriangulationCellBase_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 multi-domain.
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 read-write access to two Cell_handle called 'intrusive'.
For parallel algorithms, the functions related to facet access/modification must be concurrency-safe 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 |
| 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 non-visited. | |
| const Point & | 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 p) |
Sets point p as the surface center of facet(i). | |
| void | set_facet_surface_center_index (int i, Index index) |
Sets surface center index of facet(i) to index. | |
| Index | get_facet_surface_center_index (int i) |
Returns surface center of facet(i). | |
| void | invalidate_circumcenter () |
| Invalidates the circumcenter value stored in the cell. More... | |
| 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::invalidate_circumcenter | ( | ) |
Invalidates the circumcenter value stored in the cell.
This value is usually stored in the cell, but the optimizers need to be able to invalidate this cache value.
| 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.
1.8.4