libMesh::TetGenMeshInterface Class Reference

Class TetGenMeshInterface provides an interface for tetrahedralization of meshes using the TetGen library. More...

#include <mesh_tetgen_interface.h>

Public Member Functions
	TetGenMeshInterface (UnstructuredMesh &mesh)
	Constructor. More...
	~TetGenMeshInterface ()
	Empty destructor. More...
void	set_switches (const std::string &)
	Method to set switches to tetgen, allowing for different behaviours. More...
void	triangulate_pointset ()
	Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set. More...
void	pointset_convexhull ()
	Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set. More...
void	triangulate_conformingDelaunayMesh (double quality_constraint=0., double volume_constraint=0.)
	Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set. More...
void	triangulate_conformingDelaunayMesh_carvehole (const std::vector< Point > &holes, double quality_constraint=0., double volume_constraint=0.)
	Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set. More...

Protected Member Functions
void	fill_pointlist (TetGenWrapper &wrapper)
	This function copies nodes from the _mesh into TetGen's pointlist. More...
void	assign_nodes_to_elem (unsigned *node_labels, Elem *elem)
	Assigns the node IDs contained in the 'node_labels' array to 'elem'. More...
unsigned	check_hull_integrity ()
	This function checks the integrity of the current set of elements in the Mesh to see if they comprise a convex hull, that is: More...
void	process_hull_integrity_result (unsigned result)
	This function prints an informative message and crashes based on the output of the check_hull_integrity() function. More...
void	delete_2D_hull_elements ()
	Delete original convex hull elements from the Mesh after performing a Delaunay tetrahedralization. More...

Protected Attributes
UnstructuredMesh &	_mesh
	Local reference to the mesh we are working with. More...
std::vector< unsigned >	_sequential_to_libmesh_node_map
	We should not assume libmesh nodes are numbered sequentially... More...
MeshSerializer	_serializer
	Tetgen only operates on serial meshes. More...
std::string	_switches
	Parameter controlling the behaviour of tetgen. More...

Detailed Description

Class TetGenMeshInterface provides an interface for tetrahedralization of meshes using the TetGen library.

For information about TetGen cf. TetGen home page.

Author

Steffen Petersen

Date

2004

Author

John W. Peterson

Date

2011

Definition at line 54 of file mesh_tetgen_interface.h.

Constructor & Destructor Documentation

TetGenMeshInterface()

libMesh::TetGenMeshInterface::TetGenMeshInterface ( UnstructuredMesh &  mesh )

explicit

Constructor.

Takes a reference to the mesh.

~TetGenMeshInterface()

libMesh::TetGenMeshInterface::~TetGenMeshInterface

(

)

Empty destructor.

Definition at line 67 of file mesh_tetgen_interface.h.

{}

Member Function Documentation

assign_nodes_to_elem()

void libMesh::TetGenMeshInterface::assign_nodes_to_elem ( unsigned *  node_labels, Elem *  elem  )

protected

Assigns the node IDs contained in the 'node_labels' array to 'elem'.

check_hull_integrity()

unsigned libMesh::TetGenMeshInterface::check_hull_integrity ( )

protected

This function checks the integrity of the current set of elements in the Mesh to see if they comprise a convex hull, that is:

• If they are all TRI3 elements
• They all have non-nullptr neighbors

Returns

• 0 if the mesh forms a valid convex hull
• 1 if a non-TRI3 element is found
• 2 if an element with a nullptr-neighbor is found

delete_2D_hull_elements()

void libMesh::TetGenMeshInterface::delete_2D_hull_elements ( )

protected

Delete original convex hull elements from the Mesh after performing a Delaunay tetrahedralization.

fill_pointlist()

void libMesh::TetGenMeshInterface::fill_pointlist ( TetGenWrapper &  wrapper )

protected

This function copies nodes from the _mesh into TetGen's pointlist.

Takes some pains to ensure that non-sequential node numberings (which can happen with e.g. DistributedMesh) are handled.

pointset_convexhull()

void libMesh::TetGenMeshInterface::pointset_convexhull

(

)

Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set.

Stores only 2D hull surface elements.

process_hull_integrity_result()

void libMesh::TetGenMeshInterface::process_hull_integrity_result ( unsigned  result )

protected

This function prints an informative message and crashes based on the output of the check_hull_integrity() function.

It is a separate function so that you can check hull integrity without crashing if you desire.

set_switches()

void libMesh::TetGenMeshInterface::set_switches

(

const std::string &

)

Method to set switches to tetgen, allowing for different behaviours.

triangulate_conformingDelaunayMesh()

void libMesh::TetGenMeshInterface::triangulate_conformingDelaunayMesh	(	double	quality_constraint = 0.,
		double	volume_constraint = 0.
	)

Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set.

Boundary constraints are taken from elements array.

triangulate_conformingDelaunayMesh_carvehole()

void libMesh::TetGenMeshInterface::triangulate_conformingDelaunayMesh_carvehole	(	const std::vector< Point > &	holes,
		double	quality_constraint = 0.,
		double	volume_constraint = 0.
	)

Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set.

Boundary constraints are taken from elements array. Include carve-out functionality.

triangulate_pointset()

void libMesh::TetGenMeshInterface::triangulate_pointset

(

)

Method invokes TetGen library to compute a Delaunay tetrahedralization from the nodes point set.

Member Data Documentation

_mesh

UnstructuredMesh& libMesh::TetGenMeshInterface::_mesh

protected

Local reference to the mesh we are working with.

Definition at line 151 of file mesh_tetgen_interface.h.

_sequential_to_libmesh_node_map

std::vector<unsigned> libMesh::TetGenMeshInterface::_sequential_to_libmesh_node_map

protected

We should not assume libmesh nodes are numbered sequentially...

This is not the default behavior of DistributedMesh, for example, unless you specify node IDs explicitly. So this array allows us to keep a mapping between the sequential numbering in tetgen_data.pointlist.

Definition at line 160 of file mesh_tetgen_interface.h.

_serializer

MeshSerializer libMesh::TetGenMeshInterface::_serializer

protected

Tetgen only operates on serial meshes.

Definition at line 165 of file mesh_tetgen_interface.h.

_switches

std::string libMesh::TetGenMeshInterface::_switches

protected

Parameter controlling the behaviour of tetgen.

By default quiet.

Definition at line 171 of file mesh_tetgen_interface.h.

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The documentation for this class was generated from the following file:

• include/mesh/mesh_tetgen_interface.h