libMesh::MeshTools::Generation Namespace Reference

Tools for Mesh generation. More...

Classes
class	QueryElemSubdomainIDBase
	Class for receiving the callback during extrusion generation and providing user-defined subdomains based on the old (existing) element id and the current layer. More...

Functions
void	build_cube (UnstructuredMesh &mesh, const unsigned int nx=0, const unsigned int ny=0, const unsigned int nz=0, const Real xmin=0., const Real xmax=1., const Real ymin=0., const Real ymax=1., const Real zmin=0., const Real zmax=1., const ElemType type=INVALID_ELEM, const bool gauss_lobatto_grid=false)
	Builds a (elements) cube. More...
void	build_point (UnstructuredMesh &mesh, const ElemType type=INVALID_ELEM, const bool gauss_lobatto_grid=false)
	A specialized build_cube() for 0D meshes. More...
void	build_line (UnstructuredMesh &mesh, const unsigned int nx, const Real xmin=0., const Real xmax=1., const ElemType type=INVALID_ELEM, const bool gauss_lobatto_grid=false)
	A specialized build_cube() for 1D meshes. More...
void	build_square (UnstructuredMesh &mesh, const unsigned int nx, const unsigned int ny, const Real xmin=0., const Real xmax=1., const Real ymin=0., const Real ymax=1., const ElemType type=INVALID_ELEM, const bool gauss_lobatto_grid=false)
	A specialized build_cube() for 2D meshes. More...
void	build_sphere (UnstructuredMesh &mesh, const Real rad=1, const unsigned int nr=2, const ElemType type=INVALID_ELEM, const unsigned int n_smooth=2, const bool flat=true)
	Meshes a spherical or mapped-spherical domain. More...
void	build_extrusion (UnstructuredMesh &mesh, const MeshBase &cross_section, const unsigned int nz, RealVectorValue extrusion_vector, QueryElemSubdomainIDBase *elem_subdomain=nullptr)
	Meshes the tensor product of a 1D and a 1D-or-2D domain. More...
void	build_delaunay_square (UnstructuredMesh &mesh, const unsigned int nx, const unsigned int ny, const Real xmin, const Real xmax, const Real ymin, const Real ymax, const ElemType type, const std::vector< TriangleInterface::Hole *> *holes=nullptr)
	Meshes a rectangular (2D) region (with or without holes) with a Delaunay triangulation. More...

Detailed Description

Tools for Mesh generation.

Author

Benjamin S. Kirk

Date

2004

Function Documentation

build_cube()

void libMesh::MeshTools::Generation::build_cube	(	UnstructuredMesh &	mesh,
		const unsigned int	nx = 0,
		const unsigned int	ny = 0,
		const unsigned int	nz = 0,
		const Real	xmin = 0.,
		const Real	xmax = 1.,
		const Real	ymin = 0.,
		const Real	ymax = 1.,
		const Real	zmin = 0.,
		const Real	zmax = 1.,
		const ElemType	type = INVALID_ELEM,
		const bool	gauss_lobatto_grid = false
	)

Builds a (elements) cube.

Defaults to a unit cube (or line in 1D, square in 2D), but the dimensions can be specified through the optional arguments.

Boundary ids are set to be equal to the side indexing on a master hex

Referenced by FETest< order, family, elem_type >::setUp(), and PartitionerTest< PartitionerSubclass, MeshClass >::testPartition().

build_delaunay_square()

void libMesh::MeshTools::Generation::build_delaunay_square	(	UnstructuredMesh &	mesh,
		const unsigned int	nx,
		const unsigned int	ny,
		const Real	xmin,
		const Real	xmax,
		const Real	ymin,
		const Real	ymax,
		const ElemType	type,
		const std::vector< TriangleInterface::Hole *> *	holes = nullptr
	)

Meshes a rectangular (2D) region (with or without holes) with a Delaunay triangulation.

This function internally calls the triangle library written by J.R. Shewchuk.

build_extrusion()

void libMesh::MeshTools::Generation::build_extrusion	(	UnstructuredMesh &	mesh,
		const MeshBase &	cross_section,
		const unsigned int	nz,
		RealVectorValue	extrusion_vector,
		QueryElemSubdomainIDBase *	elem_subdomain = nullptr
	)

Meshes the tensor product of a 1D and a 1D-or-2D domain.

build_line()

void libMesh::MeshTools::Generation::build_line	(	UnstructuredMesh &	mesh,
		const unsigned int	nx,
		const Real	xmin = 0.,
		const Real	xmax = 1.,
		const ElemType	type = INVALID_ELEM,
		const bool	gauss_lobatto_grid = false
	)

A specialized build_cube() for 1D meshes.

Boundary ids are set to be equal to the side indexing on a master edge

build_point()

void libMesh::MeshTools::Generation::build_point	(	UnstructuredMesh &	mesh,
		const ElemType	type = INVALID_ELEM,
		const bool	gauss_lobatto_grid = false
	)

A specialized build_cube() for 0D meshes.

The resulting mesh is a single NodeElem suitable for ODE tests

Referenced by TimeSolverTestImplementation< TimeSolverType >::run_test_with_exact_soln().

build_sphere()

void libMesh::MeshTools::Generation::build_sphere	(	UnstructuredMesh &	mesh,
		const Real	rad = 1,
		const unsigned int	nr = 2,
		const ElemType	type = INVALID_ELEM,
		const unsigned int	n_smooth = 2,
		const bool	flat = true
	)

Meshes a spherical or mapped-spherical domain.

build_square()

void libMesh::MeshTools::Generation::build_square	(	UnstructuredMesh &	mesh,
		const unsigned int	nx,
		const unsigned int	ny,
		const Real	xmin = 0.,
		const Real	xmax = 1.,
		const Real	ymin = 0.,
		const Real	ymax = 1.,
		const ElemType	type = INVALID_ELEM,
		const bool	gauss_lobatto_grid = false
	)

A specialized build_cube() for 2D meshes.

Boundary ids are set to be equal to the side indexing on a master quad