MeshCellBase

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MeshCellBase_3

Definition

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. As a Cgal 3D triangulation triangulates the whole convex hull of its vertices, it is needed to specify whether 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.

Refines

RegularTriangulationCellBase_3

Types

MeshCellBase_3::Point
	Point type, required to match the point type of the 3D triangulation in which the mesh is embedded.

MeshCellBase_3::Subdomain_index;
	Type of indices for cells of the input complex. Must match the type MeshDomain_3::Subdomain_index.
MeshCellBase_3::Surface_index;
	Type of indices for surface patches of the input complex. Must match the type MeshDomain_3::Surface_index.

Operations

Subdomain_index	cell.subdomain_index ()	Returns the index of the input subdomain that contains the cell cell of the triangulation.

void	cell.set_subdomain_index ( Subdomain_index index)
		Sets the subdomain index of the cell.

bool	cell.is_facet_on_surface ( int i)	returns true iff facet(i) is a surface facet.
void	cell.set_facet_on_surface ( int i, Surface_index index)
		Sets facet(i) as a surface facet iff index is different from Surface_index default value.

bool	cell.is_facet_visited ( int i)	Returns true iff facet(i) has been visited.
void	cell.set_facet_visited ( int i, bool b)
		Marks facet(i) as visited if b is true and non-visited otherwise.

Point	cell.facet_surface_center ( int i)
		Returns a const reference to the surface center of facet(i).
void	cell.set_facet_surface_center ( int i, Point p)
		Sets point p as the surface center of facet(i).

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