Imports 3D mesh with tetrahedra and hexahedra. More...

#include <meshImport3D.hh>

Inheritance diagram for concepts::Import3dMesh:

Classes
class	NodeCell
	Stores the nodes and edges of a cell to be created. More...

class	NodeHexahedron
	Stores the nodes and faces of a hexahedral cell to be created. More...

class	NodeTetrahedron
	Stores the nodes and faces of a tetrahedral cell to be created. More...

class	S
	Scanner class for Import3dMesh. More...

Public Member Functions
	Import3dMesh (const std::string coord, const std::string elms, const std::string boundary, const uint idxStart=1, const bool leftHand=false, const uint elmtyp=0)
	Constructor. More...

virtual uint	ncell () const
	Returns the number of cells in the mesh. More...

virtual Scan3 *	scan ()
	Returns a scanner over the cells of the mesh. More...

virtual	~Import3dMesh ()

Protected Member Functions
virtual std::ostream &	info (std::ostream &os) const
	Returns information in an output stream. More...

Private Member Functions
void	clear_ (std::vector< NodeCell * > &cells) const
	Deletes the content of `cells`. More...

void	createEdge_ (uint ix, uint iy, std::map< uint, std::map< uint, Edge * > > &edges, Attribute attr=0, Edge **e=0)
	Creates the edge with vertices `ix` and `iy` using `edges` as repository. More...

Quad *	createQuad_ (const Index &I, std::map< uint, std::map< uint, Edge * > > &edges, Attribute attr=0)
	Creates a quad. More...

Triangle *	createTriangle_ (const Index &I, std::map< uint, std::map< uint, Edge * > > &edges, Attribute attr=0)
	Creates a triangle. More...

uint	readInts_ (const std::string &i, std::vector< int > &v) const
	Reads integers from the string. More...

Private Attributes
std::vector< Cell3 * >	cell_
	List of cells. More...

std::vector< Edge * >	edg_
	List of edges. More...

std::unordered_map< Index, Quad *, std::hash< Index >, std::IndexEqual >	quad_
	List of quads. More...

std::unordered_map< Index, Triangle *, std::hash< Index >, std::IndexEqual >	tri_
	List of triangles. More...

std::vector< Vertex * >	vtx_
	List of vertices. More...

Detailed Description

Imports 3D mesh with tetrahedra and hexahedra.

They can be mixed in the mesh—the only problem is, that tetrahedra and hexahedra cannot connect to each other, but this importer can be enhanced to support prisms or pyramids as well.

The notation for the meshes is used in [1] for instance.

Author: Philipp Frauenfelder, 2002

Test:

test::DeadLock1

test::DeadLock3

See also: [1] Alberty, Carstensen, Funken, Remarks Around 50 Lines of MATLAB: Finite Element Implementation, 1998

Examples: hpFEM3d-EV.cc.

Definition at line 94 of file meshImport3D.hh.

Constructor & Destructor Documentation

◆ Import3dMesh()

concepts::Import3dMesh::Import3dMesh	(	const std::string	coord,
		const std::string	elms,
		const std::string	boundary,
		const uint	idxStart = `1`,
		const bool	leftHand = `false`,
		const uint	elmtyp = `0`
	)

Constructor.

Reads the data from three files and creates a mesh from it. The vertices, faces and cells should be number in striclty increasing order, ie. 1, 2, 3 etc.

Parameters

coord	File with coordinates of vertices. Format: <node> <x> <y> <z> For instance: 1 1.0 1.0 2.0 2 0.0 0.5 1.0 3 0.0 0.0 0.0 4 -1.0 2.0 3.0
elms	File with node numbers of tetrahedra or hexahedra. Format: <tetrahedron> <node0> <node1> <node2> <node3> or <hexahedron> <node0> <node1> <node2> <node3> <node4> <node5> <node6> <node7> For instance: 1 1 2 3 4 or 1 1 2 3 4 5 6 7 8
boundary	File with node numbers of edges with boundary conditions and attribute number. Format for a triangle: <face> <node0> <node1> <node2> <attr> Format for a quad: <face> <node0> <node1> <node2> <node3> <attr> Format for an edge: <edge> <node0> <node1> <attr> Format for a vertex: <vtx> <node> <attr> For instance: 1 2 33 2 1 2 66 3 1 2 3 44 4 1 2 3 4 55 Vertices should come first in the list of boundary attributes, then edges and triangle or quads last.
idxStart	Starting point of indices in the files (1 or 0)
leftHand	Indicates if the order of the points in a tet follow the left hand rule
elmtyp	only for hexahedras (0: Hexahedron3d is used, 1: Parallelepiped3d is used)

◆ ~Import3dMesh()

virtual concepts::Import3dMesh::~Import3dMesh ( )

virtual

Member Function Documentation

◆ clear_()

void concepts::Import3dMesh::clear_ ( std::vector< NodeCell * > & cells ) const

private

Deletes the content of cells.

◆ createEdge_()

void concepts::Import3dMesh::createEdge_	(	uint	ix,
		uint	iy,
		std::map< uint, std::map< uint, Edge * > > &	edges,
		Attribute	attr = `0`,
		Edge **	e = `0`
	)

private

Creates the edge with vertices ix and iy using edges as repository.

If e is different from 0, the found or created edge is stored there.

Parameters

ix	Index of first vertex
iy	Index of second vertex
edges	Stores the edges index by smaller and greater index
attr	Attribute for the edge
e	Return value: the new (or found) edge

Precondition: ix and iy are vertices which are mentioned in vtx_

◆ createQuad_()

Quad* concepts::Import3dMesh::createQuad_	(	const Index &	I,
		std::map< uint, std::map< uint, Edge * > > &	edges,
		Attribute	attr = `0`
	)

private

Creates a quad.

The edges are taken from edges or created and stored there by calling createEdge_.

Parameters

I	Indices of the vertices to create the quad from
edges	Storage area for the edges
attr	Attribute for the triangle

Returns: the new or found quad

◆ createTriangle_()

Triangle* concepts::Import3dMesh::createTriangle_	(	const Index &	I,
		std::map< uint, std::map< uint, Edge * > > &	edges,
		Attribute	attr = `0`
	)

private

Creates a triangle.

The edges are taken from edges or created and stored there by calling createEdge_.

Parameters

I	Indices of the vertices to create the triangle from
edges	Storage area for the edges
attr	Attribute for the triangle

Returns: the new or found triangle

◆ info()

virtual std::ostream& concepts::Import3dMesh::info ( std::ostream & os ) const

protectedvirtual

Returns information in an output stream.

Reimplemented from concepts::Mesh.

◆ ncell()

virtual uint concepts::Import3dMesh::ncell ( ) const

inlinevirtual

Returns the number of cells in the mesh.

Implements concepts::Mesh.

Definition at line 140 of file meshImport3D.hh.

◆ readInts_()

uint concepts::Import3dMesh::readInts_	(	const std::string &	i,
		std::vector< int > &	v
	)		const

private

Reads integers from the string.

Returns: Number of integers read

◆ scan()

virtual Scan3* concepts::Import3dMesh::scan ( )

inlinevirtual

Returns a scanner over the cells of the mesh.

Postcondition: The scanner must be deleted after usage. This has to be done by the user.

Implements concepts::Mesh3.

Definition at line 141 of file meshImport3D.hh.

Member Data Documentation

◆ cell_

std::vector<Cell3*> concepts::Import3dMesh::cell_

private

List of cells.

Definition at line 173 of file meshImport3D.hh.

◆ edg_

std::vector<Edge*> concepts::Import3dMesh::edg_

private

List of edges.

Definition at line 165 of file meshImport3D.hh.

◆ quad_

std::unordered_map<Index, Quad*, std::hash<Index>, std::IndexEqual> concepts::Import3dMesh::quad_

private

List of quads.

Definition at line 171 of file meshImport3D.hh.

◆ tri_

std::unordered_map<Index, Triangle*, std::hash<Index>, std::IndexEqual> concepts::Import3dMesh::tri_

private

List of triangles.

Definition at line 168 of file meshImport3D.hh.

◆ vtx_

std::vector<Vertex*> concepts::Import3dMesh::vtx_

private

List of vertices.

Definition at line 163 of file meshImport3D.hh.

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

geometry/meshImport3D.hh

concepts::Import3dMesh Class ReferenceGeometry

Classes

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Import3dMesh()

◆ ~Import3dMesh()

Member Function Documentation

◆ clear_()

◆ createEdge_()

◆ createQuad_()

◆ createTriangle_()

◆ info()

◆ ncell()

◆ readInts_()

◆ scan()

Member Data Documentation

◆ cell_

◆ edg_

◆ quad_

◆ tri_

◆ vtx_

concepts::Import3dMesh Class Reference
Geometry