SMDS_DownQuadQuadrangle Class Reference

#include <SMDS_Downward.hxx>

Inheritance diagram for SMDS_DownQuadQuadrangle:

Public Member Functions
virtual int	getNumberOfUpCells (int cellId)
virtual const int *	getUpCells (int cellId)
virtual const unsigned char *	getUpTypes (int cellId)
virtual void	getNodeIds (int cellId, std::set< int > &nodeSet)
virtual int	getNumberOfDownCells (int cellId)
	Get the number of downward entities associated to a cell (always the same for a given vtk type of cell) More...
virtual const int *	getDownCells (int cellId)
	get a pointer on the downward entities id's associated to a cell. More...
virtual const unsigned char *	getDownTypes (int cellId)
	get a list of vtk cell types associated to downward entities of a given cell, in the same order than the downward entities id's list ( More...
virtual int	getNodes (int cellId, int *nodevec)
virtual void	getOrderedNodesOfFace (int cellId, std::vector< vtkIdType > &orderedNodes)
int	getVtkCellId (int cellId)
int	getMaxId ()

Static Public Member Functions
static int	getCellDimension (unsigned char cellType)
	get the dimension of a cell (1,2,3 for 1D, 2D 3D) given the vtk cell type More...

Protected Member Functions
	SMDS_DownQuadQuadrangle (SMDS_UnstructuredGrid *grid)
	~SMDS_DownQuadQuadrangle ()
virtual void	computeEdgesWithNodes (int cellId, ListElemByNodesType &edgesWithNodes)
virtual void	addDownCell (int cellId, int lowCellId, unsigned char aType)
	Id's are downward connectivity id's. More...
virtual void	allocate (int nbElems)
	Resize the downward connectivity storage vector if needed. More...
virtual void	compactStorage ()
virtual void	addUpCell (int cellId, int upCellId, unsigned char aType)
	Id's are downward connectivity id's. More...
virtual int	getNodeSet (int cellId, int *nodeSet)
int	computeVolumeIds (int cellId, int *ids)
	Find in vtkUnstructuredGrid the volumes containing a face already stored in vtkUnstructuredGrid. More...
int	computeVolumeIds (ElemByNodesType &faceByNodes, int *ids)
	Find in vtkUnstructuredGrid the volumes containing a face described by it's nodes Search the volumes containing a face, to store the info in SMDS_Down2D for later uses with SMDS_Down2D::getUpCells and SMDS_Down2D::getUpTypes. More...
int	computeVolumeIdsFromNodesFace (int *nodes, int nbNodes, int *ids)
	Find in vtkUnstructuredGrid the volumes containing a face described by it's nodes Search the volumes containing a face, to store the info in SMDS_Down2D for later uses with SMDS_Down2D::getUpCells and SMDS_Down2D::getUpTypes. More...
void	setTempNodes (int cellId, int vtkId)
void	setTempNodes (int cellId, ElemByNodesType &faceByNodes)
bool	isInFace (int cellId, int *pts, int npts)
	Find if all the nodes belongs to the face. More...
int	FindEdgeByNodes (int cellId, ElemByNodesType &edgeByNodes)
int	addCell (int vtkId=-1)
	Give or create an entry for downward connectivity structure relative to a cell. More...
virtual void	initCell (int cellId)
	generic method do nothing. More...

Protected Attributes
std::vector< int >	_upCellIds
	2 volumes max. More...
std::vector< unsigned char >	_upCellTypes
	2 volume types per face More...
std::vector< int >	_tempNodes
	temporary storage of nodes, until downward connectivity completion More...
int	_nbNodes
	number of nodes in a face More...
SMDS_UnstructuredGrid *	_grid
int	_maxId
int	_nbDownCells
	the same number for all cells of a derived class More...
std::vector< int >	_cellIds
	growing size: all the down cell id's, size = _maxId * _nbDownCells More...
std::vector< int >	_vtkCellIds
	growing size: size = _maxId, either vtkId or -1 More...
std::vector< unsigned char >	_cellTypes
	fixed size: the same vector for all cells of a derived class More...

Static Protected Attributes
static std::vector< int >	_cellDimension
	conversion table: type –> dimension More...

Friends
class	SMDS_UnstructuredGrid

Constructor & Destructor Documentation

SMDS_DownQuadQuadrangle::SMDS_DownQuadQuadrangle ( SMDS_UnstructuredGrid *  grid )

protected

References SMDS_Downward::_cellTypes, and SMDS_Down2D::_nbNodes.

SMDS_DownQuadQuadrangle::~SMDS_DownQuadQuadrangle ( )

protected

Member Function Documentation

int SMDS_Downward::addCell ( int  vtkId = -1 )

protectedinherited

Give or create an entry for downward connectivity structure relative to a cell.

If the entry already exists, just return its id, otherwise, create it. The internal storage memory is allocated if needed. The SMDS_UnstructuredGrid::_cellIdToDownId vector is completed for vtkUnstructuredGrid cells.

Parameters

vtkId

for a vtkUnstructuredGrid cell or -1 (default) for a created downward cell.

Returns

the rank in downward[vtkType] structure.

References SMDS_Downward::_grid, SMDS_Downward::_maxId, SMDS_Downward::_vtkCellIds, SMDS_Downward::allocate(), SMDS_UnstructuredGrid::CellIdToDownId(), SMDS_Downward::initCell(), and SMDS_UnstructuredGrid::setCellIdToDownId().

void SMDS_DownQuadQuadrangle::addDownCell ( int  cellId, int  lowCellId, unsigned char  aType  )

protectedvirtual

Id's are downward connectivity id's.

Reimplemented from SMDS_Downward.

References SMDS_Downward::_cellIds, and SMDS_Downward::_nbDownCells.

void SMDS_Down2D::addUpCell ( int  cellId, int  upCellId, unsigned char  aType  )

protectedvirtualinherited

Id's are downward connectivity id's.

add a downward entity of dimension n+1 to a given cell.

Actual implementation is done in derived methods.

Parameters

cellId	index of the children cell (dimension n) in the downward structure relative to a vtk cell type.
upCellId	index of the parent cell to add (dimension n+1)
aType	vtk cell type of the cell to add (needed to find the SMDS_Downward structure containing the cell to add).

Reimplemented from SMDS_Downward.

References SMDS_Down2D::_upCellIds, and SMDS_Down2D::_upCellTypes.

void SMDS_Down2D::allocate ( int  nbElems )

protectedvirtualinherited

Resize the downward connectivity storage vector if needed.

Parameters

nbElems

total number of elements of the same type required

Implements SMDS_Downward.

References SMDS_Downward::_cellIds, SMDS_Downward::_nbDownCells, SMDS_Down2D::_nbNodes, SMDS_Down2D::_tempNodes, SMDS_Down2D::_upCellIds, SMDS_Down2D::_upCellTypes, SMDS_Downward::_vtkCellIds, and SMDS_Mesh::chunkSize.

void SMDS_Down2D::compactStorage ( )

protectedvirtualinherited

Implements SMDS_Downward.

References SMDS_Downward::_cellIds, SMDS_Downward::_maxId, SMDS_Downward::_nbDownCells, SMDS_Down2D::_tempNodes, SMDS_Down2D::_upCellIds, SMDS_Down2D::_upCellTypes, and SMDS_Downward::_vtkCellIds.

void SMDS_DownQuadQuadrangle::computeEdgesWithNodes ( int  cellId, ListElemByNodesType &  edgesWithNodes  )

protectedvirtual

Implements SMDS_Down2D.

References SMDS_Down2D::_nbNodes, SMDS_Down2D::_tempNodes, ListElemByNodesType::elems, ListElemByNodesType::nbElems, ElemByNodesType::nbNodes, ElemByNodesType::nodeIds, and ElemByNodesType::vtkType.

int SMDS_Down2D::computeVolumeIds ( int  cellId, int *  ids  )

protectedinherited

Find in vtkUnstructuredGrid the volumes containing a face already stored in vtkUnstructuredGrid.

Search the volumes containing a face, to store the info in SMDS_Down2D for later uses with SMDS_Down2D::getUpCells and SMDS_Down2D::getUpTypes. A face belongs to 0, 1 or 2 volumes, identified by their id in vtkUnstructuredGrid.

Parameters

cellId	the face cell id in vkUnstructuredGrid
ids	a couple of vtkId, initialized at -1 (no parent volume)

Returns

number of volumes (0, 1 or 2)

References SMDS_Downward::_grid, and SMDS_Down2D::computeVolumeIdsFromNodesFace().

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity().

int SMDS_Down2D::computeVolumeIds ( ElemByNodesType &  faceByNodes, int *  ids  )

protectedinherited

Find in vtkUnstructuredGrid the volumes containing a face described by it's nodes Search the volumes containing a face, to store the info in SMDS_Down2D for later uses with SMDS_Down2D::getUpCells and SMDS_Down2D::getUpTypes.

A face belongs to 0, 1 or 2 volumes, identified by their id in vtkUnstructuredGrid.

Parameters

faceByNodes
ids	a couple of vtkId, initialized at -1 (no parent volume)

Returns

number of volumes (0, 1 or 2)

References SMDS_Down2D::computeVolumeIdsFromNodesFace(), ElemByNodesType::nbNodes, and ElemByNodesType::nodeIds.

int SMDS_Down2D::computeVolumeIdsFromNodesFace ( int *  pts, int  npts, int *  ids  )

protectedinherited

Find in vtkUnstructuredGrid the volumes containing a face described by it's nodes Search the volumes containing a face, to store the info in SMDS_Down2D for later uses with SMDS_Down2D::getUpCells and SMDS_Down2D::getUpTypes.

A face belongs to 0, 1 or 2 volumes, identified by their id in vtkUnstructuredGrid.

Parameters

pts	array of vtk node id's
npts	number of nodes
ids

Returns

number of volumes (0, 1 or 2)

References SMDS_Downward::_grid, SMDS_Downward::getCellDimension(), and SMDS_UnstructuredGrid::GetLinks().

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity(), and SMDS_Down2D::computeVolumeIds().

int SMDS_Down2D::FindEdgeByNodes ( int  cellId, ElemByNodesType &  edgeByNodes  )

protectedinherited

References SMDS_Downward::_cellIds, SMDS_Downward::_cellTypes, SMDS_Downward::_grid, SMDS_Downward::_nbDownCells, SMDS_UnstructuredGrid::getDownArray(), SMDS_Downward::getNodeSet(), ElemByNodesType::nodeIds, and ElemByNodesType::vtkType.

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity().

int SMDS_Downward::getCellDimension ( unsigned char  cellType )

staticinherited

get the dimension of a cell (1,2,3 for 1D, 2D 3D) given the vtk cell type

Parameters

cellType

vtk cell type

See Also

vtkCellType.h

Returns

1,2 or 3

References VTK_MAXTYPE.

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity(), SMDS_Down1D::computeFaces(), SMDS_Down2D::computeVolumeIdsFromNodesFace(), SMDS_Down1D::computeVtkCells(), SMESH_MeshEditor::CreateHoleSkin(), SMDS_UnstructuredGrid::GetNeighbors(), SMDS_UnstructuredGrid::getOrderedNodesOfFace(), SMDS_UnstructuredGrid::GetParentVolumes(), and SMDS_Downward::SMDS_Downward().

const int * SMDS_Downward::getDownCells ( int  cellId )

virtualinherited

get a pointer on the downward entities id's associated to a cell.

See Also

SMDS_Downward::getNumberOfDownCells for the number of downward entities.

SMDS_Downward::getDownTypes for the vtk cell types associated to the downward entities.

Parameters

cellId

index of the cell in the downward structure relative to a given vtk cell type.

Returns

table of downward entities id's.

References SMDS_Downward::_cellIds, and SMDS_Downward::_nbDownCells.

Referenced by SMDS_Down1D::computeFaces(), SMESH_MeshEditor::CreateHoleSkin(), and SMESH_MeshEditor::DoubleNodesOnGroupBoundaries().

const unsigned char * SMDS_Downward::getDownTypes ( int  cellId )

virtualinherited

get a list of vtk cell types associated to downward entities of a given cell, in the same order than the downward entities id's list (

See Also

SMDS_Downward::getDownCells).

Parameters

cellId

index of the cell in the downward structure relative to a vtk cell type.

Returns

table of downward entities types.

References SMDS_Downward::_cellTypes.

Referenced by SMDS_Down1D::computeFaces(), SMESH_MeshEditor::CreateHoleSkin(), and SMESH_MeshEditor::DoubleNodesOnGroupBoundaries().

int SMDS_Downward::getMaxId ( )

inherited

References SMDS_Downward::_maxId.

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity().

void SMDS_Down2D::getNodeIds ( int  cellId, std::set< int > &  nodeSet  )

virtualinherited

Implements SMDS_Downward.

References SMDS_Downward::_cellIds, SMDS_Downward::_cellTypes, SMDS_Downward::_grid, SMDS_Downward::_nbDownCells, SMDS_UnstructuredGrid::getDownArray(), and SMDS_Downward::getNodeIds().

virtual int SMDS_Downward::getNodes ( int  cellId, int *  nodevec  )

virtualinherited

Reimplemented in SMDS_Down1D.

Referenced by SMESH_MeshEditor::CreateHoleSkin(), and SMESH_MeshEditor::DoubleNodesOnGroupBoundaries().

int SMDS_Down2D::getNodeSet ( int  cellId, int *  nodeSet  )

protectedvirtualinherited

Reimplemented from SMDS_Downward.

References SMDS_Down2D::_nbNodes, and SMDS_Down2D::_tempNodes.

int SMDS_Downward::getNumberOfDownCells ( int  cellId )

virtualinherited

Get the number of downward entities associated to a cell (always the same for a given vtk type of cell)

Parameters

cellId

not used here.

Returns

References SMDS_Downward::_nbDownCells.

Referenced by SMDS_Down1D::computeFaces(), SMESH_MeshEditor::CreateHoleSkin(), and SMESH_MeshEditor::DoubleNodesOnGroupBoundaries().

int SMDS_Down2D::getNumberOfUpCells ( int  cellId )

virtualinherited

Implements SMDS_Downward.

References SMDS_Down2D::_upCellIds.

virtual void SMDS_Downward::getOrderedNodesOfFace ( int  cellId, std::vector< vtkIdType > &  orderedNodes  )

virtualinherited

Reimplemented in SMDS_DownQuadHexa, SMDS_DownHexa, SMDS_DownQuadPenta, SMDS_DownPenta, SMDS_DownQuadPyramid, SMDS_DownPyramid, SMDS_DownQuadTetra, and SMDS_DownTetra.

Referenced by SMDS_UnstructuredGrid::getOrderedNodesOfFace().

const int * SMDS_Down2D::getUpCells ( int  cellId )

virtualinherited

Implements SMDS_Downward.

References SMDS_Down2D::_upCellIds.

const unsigned char * SMDS_Down2D::getUpTypes ( int  cellId )

virtualinherited

Implements SMDS_Downward.

References SMDS_Down2D::_upCellTypes.

int SMDS_Downward::getVtkCellId ( int  cellId )

inherited

References SMDS_Downward::_vtkCellIds.

Referenced by SMESH_MeshEditor::CreateHoleSkin().

void SMDS_Downward::initCell ( int  cellId )

protectedvirtualinherited

generic method do nothing.

see derived methods

Parameters

cellId

Reimplemented in SMDS_Down1D.

Referenced by SMDS_Downward::addCell().

bool SMDS_Down2D::isInFace ( int  cellId, int *  pts, int  npts  )

protectedinherited

Find if all the nodes belongs to the face.

Parameters

cellId	the face cell Id
nodeSet	set of node id's to be found in the face list of nodes

Returns

References SMDS_Down2D::_nbNodes, and SMDS_Down2D::_tempNodes.

Referenced by SMDS_Down1D::computeFaces().

void SMDS_Down2D::setTempNodes ( int  cellId, int  vtkId  )

protectedinherited

References SMDS_Downward::_grid, SMDS_Down2D::_nbNodes, and SMDS_Down2D::_tempNodes.

Referenced by SMDS_UnstructuredGrid::BuildDownwardConnectivity().

void SMDS_Down2D::setTempNodes ( int  cellId, ElemByNodesType &  faceByNodes  )

protectedinherited

References SMDS_Down2D::_nbNodes, SMDS_Down2D::_tempNodes, ElemByNodesType::nbNodes, and ElemByNodesType::nodeIds.

Friends And Related Function Documentation

friend class SMDS_UnstructuredGrid

friend

Field Documentation

vector< int > SMDS_Downward::_cellDimension

staticprotectedinherited

conversion table: type –> dimension

Referenced by SMDS_Downward::SMDS_Downward().

std::vector<int> SMDS_Downward::_cellIds

protectedinherited

growing size: all the down cell id's, size = _maxId * _nbDownCells

Referenced by SMDS_DownTriangle::addDownCell(), SMDS_DownQuadTriangle::addDownCell(), SMDS_DownQuadrangle::addDownCell(), addDownCell(), SMDS_DownTetra::addDownCell(), SMDS_DownQuadTetra::addDownCell(), SMDS_DownPyramid::addDownCell(), SMDS_DownQuadPyramid::addDownCell(), SMDS_DownPenta::addDownCell(), SMDS_DownQuadPenta::addDownCell(), SMDS_DownHexa::addDownCell(), SMDS_DownQuadHexa::addDownCell(), SMDS_Down1D::allocate(), SMDS_Down2D::allocate(), SMDS_Down3D::allocate(), SMDS_Down1D::compactStorage(), SMDS_Down2D::compactStorage(), SMDS_Down1D::computeFaces(), SMDS_Down1D::computeVtkCells(), SMDS_Down2D::FindEdgeByNodes(), SMDS_Down3D::FindFaceByNodes(), SMDS_Downward::getDownCells(), SMDS_Down1D::getNodeIds(), SMDS_Down2D::getNodeIds(), SMDS_Down1D::getNodeSet(), SMDS_Down1D::setNodes(), and SMDS_Downward::SMDS_Downward().

std::vector<unsigned char> SMDS_Downward::_cellTypes

protectedinherited

fixed size: the same vector for all cells of a derived class

Referenced by SMDS_Down2D::FindEdgeByNodes(), SMDS_Down3D::FindFaceByNodes(), SMDS_Downward::getDownTypes(), SMDS_Down2D::getNodeIds(), SMDS_DownEdge::SMDS_DownEdge(), SMDS_DownHexa::SMDS_DownHexa(), SMDS_DownPenta::SMDS_DownPenta(), SMDS_DownPyramid::SMDS_DownPyramid(), SMDS_DownQuadEdge::SMDS_DownQuadEdge(), SMDS_DownQuadHexa::SMDS_DownQuadHexa(), SMDS_DownQuadPenta::SMDS_DownQuadPenta(), SMDS_DownQuadPyramid::SMDS_DownQuadPyramid(), SMDS_DownQuadQuadrangle(), SMDS_DownQuadrangle::SMDS_DownQuadrangle(), SMDS_DownQuadTetra::SMDS_DownQuadTetra(), SMDS_DownQuadTriangle::SMDS_DownQuadTriangle(), SMDS_DownTetra::SMDS_DownTetra(), SMDS_DownTriangle::SMDS_DownTriangle(), and SMDS_Downward::SMDS_Downward().

SMDS_UnstructuredGrid* SMDS_Downward::_grid

protectedinherited

Referenced by SMDS_Downward::addCell(), SMDS_Down1D::computeFaces(), SMDS_DownTetra::computeFacesWithNodes(), SMDS_DownQuadTetra::computeFacesWithNodes(), SMDS_DownPyramid::computeFacesWithNodes(), SMDS_DownQuadPyramid::computeFacesWithNodes(), SMDS_DownPenta::computeFacesWithNodes(), SMDS_DownQuadPenta::computeFacesWithNodes(), SMDS_DownHexa::computeFacesWithNodes(), SMDS_DownQuadHexa::computeFacesWithNodes(), SMDS_Down2D::computeVolumeIds(), SMDS_Down2D::computeVolumeIdsFromNodesFace(), SMDS_Down1D::computeVtkCells(), SMDS_Down2D::FindEdgeByNodes(), SMDS_Down3D::FindFaceByNodes(), SMDS_Down2D::getNodeIds(), SMDS_Down3D::getNodeIds(), SMDS_DownTetra::getOrderedNodesOfFace(), SMDS_DownQuadTetra::getOrderedNodesOfFace(), SMDS_DownPyramid::getOrderedNodesOfFace(), SMDS_DownQuadPyramid::getOrderedNodesOfFace(), SMDS_DownPenta::getOrderedNodesOfFace(), SMDS_DownQuadPenta::getOrderedNodesOfFace(), SMDS_DownHexa::getOrderedNodesOfFace(), SMDS_DownQuadHexa::getOrderedNodesOfFace(), SMDS_Down1D::setNodes(), and SMDS_Down2D::setTempNodes().

int SMDS_Downward::_maxId

protectedinherited

Referenced by SMDS_Downward::addCell(), SMDS_Down1D::compactStorage(), SMDS_Down2D::compactStorage(), SMDS_Downward::getMaxId(), and SMDS_Downward::SMDS_Downward().

int SMDS_Downward::_nbDownCells

protectedinherited

the same number for all cells of a derived class

Referenced by SMDS_DownTriangle::addDownCell(), SMDS_DownQuadTriangle::addDownCell(), SMDS_DownQuadrangle::addDownCell(), addDownCell(), SMDS_DownTetra::addDownCell(), SMDS_DownQuadTetra::addDownCell(), SMDS_DownPyramid::addDownCell(), SMDS_DownQuadPyramid::addDownCell(), SMDS_DownPenta::addDownCell(), SMDS_DownQuadPenta::addDownCell(), SMDS_DownHexa::addDownCell(), SMDS_DownQuadHexa::addDownCell(), SMDS_Down1D::allocate(), SMDS_Down2D::allocate(), SMDS_Down3D::allocate(), SMDS_Down1D::compactStorage(), SMDS_Down2D::compactStorage(), SMDS_Down1D::computeFaces(), SMDS_Down1D::computeVtkCells(), SMDS_Down2D::FindEdgeByNodes(), SMDS_Down3D::FindFaceByNodes(), SMDS_Downward::getDownCells(), SMDS_Down1D::getNodeIds(), SMDS_Down2D::getNodeIds(), SMDS_Down1D::getNodeSet(), SMDS_Downward::getNumberOfDownCells(), and SMDS_Down1D::setNodes().

int SMDS_Down2D::_nbNodes

protectedinherited

number of nodes in a face

Referenced by SMDS_Down2D::allocate(), SMDS_DownTriangle::computeEdgesWithNodes(), SMDS_DownQuadTriangle::computeEdgesWithNodes(), SMDS_DownQuadrangle::computeEdgesWithNodes(), computeEdgesWithNodes(), SMDS_Down2D::getNodeSet(), SMDS_Down2D::isInFace(), SMDS_Down2D::setTempNodes(), SMDS_Down2D::SMDS_Down2D(), SMDS_DownQuadQuadrangle(), SMDS_DownQuadrangle::SMDS_DownQuadrangle(), SMDS_DownQuadTriangle::SMDS_DownQuadTriangle(), and SMDS_DownTriangle::SMDS_DownTriangle().

std::vector<int> SMDS_Down2D::_tempNodes

protectedinherited

temporary storage of nodes, until downward connectivity completion

Referenced by SMDS_Down2D::allocate(), SMDS_Down2D::compactStorage(), SMDS_DownTriangle::computeEdgesWithNodes(), SMDS_DownQuadTriangle::computeEdgesWithNodes(), SMDS_DownQuadrangle::computeEdgesWithNodes(), computeEdgesWithNodes(), SMDS_Down2D::getNodeSet(), SMDS_Down2D::isInFace(), SMDS_Down2D::setTempNodes(), and SMDS_Down2D::SMDS_Down2D().

std::vector<int> SMDS_Down2D::_upCellIds

protectedinherited

2 volumes max.

per face

Referenced by SMDS_Down2D::addUpCell(), SMDS_Down2D::allocate(), SMDS_Down2D::compactStorage(), SMDS_Down2D::getNumberOfUpCells(), SMDS_Down2D::getUpCells(), and SMDS_Down2D::SMDS_Down2D().

std::vector<unsigned char> SMDS_Down2D::_upCellTypes

protectedinherited

2 volume types per face

Referenced by SMDS_Down2D::addUpCell(), SMDS_Down2D::allocate(), SMDS_Down2D::compactStorage(), SMDS_Down2D::getUpTypes(), and SMDS_Down2D::SMDS_Down2D().

std::vector<int> SMDS_Downward::_vtkCellIds

protectedinherited

growing size: size = _maxId, either vtkId or -1

Referenced by SMDS_Downward::addCell(), SMDS_Down1D::allocate(), SMDS_Down2D::allocate(), SMDS_Down3D::allocate(), SMDS_Down1D::compactStorage(), SMDS_Down2D::compactStorage(), SMDS_Down3D::getNodeIds(), SMDS_DownTetra::getOrderedNodesOfFace(), SMDS_DownQuadTetra::getOrderedNodesOfFace(), SMDS_DownPyramid::getOrderedNodesOfFace(), SMDS_DownQuadPyramid::getOrderedNodesOfFace(), SMDS_DownPenta::getOrderedNodesOfFace(), SMDS_DownQuadPenta::getOrderedNodesOfFace(), SMDS_DownHexa::getOrderedNodesOfFace(), SMDS_DownQuadHexa::getOrderedNodesOfFace(), and SMDS_Downward::getVtkCellId().