PbMesh Class Reference
[Property/Data]

MeshViz Defines an abstract mesh. More...

#include <MeshViz/3Ddata/PbMesh.h>

Inheritance diagram for PbMesh:
PbBase PbMesh1D PbMesh2D PbMesh3D PbIrregularMesh1D PbRegularMesh1D PbGrid2D PbIndexedMesh2D PbGrid3D PbIndexedMesh3D PbCartesianGrid2D PbPolarGrid2D PbRegularCartesianGrid2D PbQuadrangleMesh2D PbTriangleMesh2D PbCartesianGrid3D PbRegularCartesianGrid3D PbHexahedronMesh3D PbTetrahedronMesh3D

List of all members.

Public Types

enum  DataBinding {
  PER_CELL = PoMeshProperty::PER_CELL,
  PER_NODE = PoMeshProperty::PER_NODE
}

Public Member Functions

 PbMesh (SbBool is_data_duplicated=TRUE)
 PbMesh (const PbMesh &mesh)
 ~PbMesh ()
PbMesh & operator= (const PbMesh &mesh)
int getNumNodes () const
int getNumCells () const
virtual SbVec3f getNodeCoord (int nod_index) const =0
SbBox3f getBoundingBox () const
SbBool isDataDuplicated () const
virtual void addValuesSet (int set_index, const float *val, const SbString &set_name="")
void addValuesSet (int set_index, const float *val, DataBinding binding, const SbString &set_name="")
DataBinding getValuesBinding (int set_index) const
virtual void addStringsSet (int set_index, const SbString *val, const SbString &set_name="")
virtual void addVecsSet (int set_index, const SbVec3f *val, const SbString &set_name="")
virtual const SbString * getValuesSetName (int set_index) const
virtual const SbString * getStringsSetName (int set_index) const
virtual const SbString * getVecsSetName (int set_index) const
virtual const float * getValuesSet (int set_index) const
virtual const SbString * getStringsSet (int set_index) const
virtual const SbVec3f * getVecsSet (int set_index) const
virtual SbBool removeValuesSet (int set_index)
virtual SbBool removeStringsSet (int set_index)
virtual SbBool removeVecsSet (int set_index)
virtual void removeAllValuesSet ()
virtual void removeAllStringsSet ()
virtual void removeAllVecsSet ()
virtual int getNumValuesSet () const
virtual int getNumStringsSet () const
virtual int getNumVecsSet () const
virtual SbBool getMinValuesSet (int set_index, float &min) const
virtual SbBool getMinVecsSet (int set_index, float &min) const
virtual SbBool getMaxValuesSet (int set_index, float &max) const
virtual SbBool getMaxVecsSet (int set_index, float &max) const
virtual void getNodeOwnerCellsInd (int nod_index, PbArrayOfInt &owner_cells) const =0
virtual void getNodesOwnerCellsInd (const PbArrayOfInt &nod_indices, PbArrayOfInt &owner_cells) const
virtual void getAdjacentCellsIndByNode (int cell_index, PbArrayOfInt &adjacent_cells) const
virtual void getAdjacentCellsIndByFacet (int cell_index, PbArrayOfInt &adjacent_cells) const
virtual const PbCell * getCell (int cell_index) const =0
virtual SbBox3f getSmallestCellBox (int &cell_index) const
virtual SbBox3f getBiggestCellBox (int &cell_index) const
virtual float getVolume () const =0
virtual float getArea () const =0
virtual const PbCell * findContainingCell (const SbVec3f &point, float tolerance, SbVec3f &pcoord, const PbCell *adjacent_cell) const
virtual const PbCell * findContainingCell (const SbVec3f &point, float tolerance, SbVec3f &pcoord) const
virtual void setCoordinates (const float *x_nod, const float *y_nod, const float *z_nod)
virtual void getCoordinates (const float *&xnod, const float *&ynod, const float *&znod, int &size_xnod, int &size_ynod, int &size_znod) const

Detailed Description

MeshViz Defines an abstract mesh.

A mesh is a set of nodes linked by edges. A mesh can be a surface mesh (see PbMesh2D) or a volume mesh (see PbMesh3D). A surface mesh can be either 2D (its nodes have 2 coordinates) or 3D (its nodes have 3 coordinates). Each node is referred to by an index named node_index.

A mesh is composed of a list of cells. A cell is a "simple" basic volume or surface element that connects adjacent nodes of the mesh. Surface meshes can be defined by triangles, quadrangles and polygonal cells. Volume meshes can be defined by tetrahedrons, hexahedrons, prisms, or pyramid cells. A cell is defined by the list of nodes (node indices) that it connects. The order of the nodes that define a cell is the same for each cell in the mesh. Each cell is referred to by an index named cell_index.

A list of value-set can be defined. A value is a scalar (float), string, or a vector. Each value is located on mesh node, so the number of values in a set must be equal to the number of mesh's nodes. Each set of values can be named by a string.

A scalar value set is used to color the representations of the mesh. A string value set is used by some charting representations. A vector value set is used to make "hedgehog" vector field representations, or streamline representations. Each data-set is referred by an index named set_index. This index is used by classes of mesh representation to indicate which value set must be used for coloring. (see PoMesh::valuesIndex and PoMesh::vecsIndex). Mapping a scalar value onto a color is done by PbDataMapping or PoDataMapping classes (and derived).

Data duplication:

If the last argument is_data_duplicate of a constructor of a derived class is FALSE, the geometry and values sets are not copied by the object.

In this case, the methods setGeometry, addValuesSet, addStringsSet and addVecsSet save only the adress of the user data set and it is the application's responsibility to manage the validity of data during the existence of the mesh object.

Member Enumeration Documentation

enum PbMesh::DataBinding

Data binding.

Specifies how data is specified (i.e., per cell or per node) for a data set.

Enumerator:
PER_CELL 

The data set contains one data value per cell.

PER_NODE 

The data set contains one data value per node.

Constructor & Destructor Documentation

PbMesh::PbMesh ( SbBool  is_data_duplicated = TRUE  ) 

Constructor.

If the argument is_data_duplicate is FALSE, the geometry and values sets are not copied by the object.

PbMesh::PbMesh ( const PbMesh &  mesh  ) 

Copy constructor.

PbMesh::~PbMesh (  ) 

Destructor.

Member Function Documentation

virtual void PbMesh::addStringsSet ( int  set_index,
const SbString *  val,
const SbString &  set_name = "" 
) [virtual]

Adds a set of string values .

The number of string in a set must be equal to the number of nodes in the mesh. The set can be optionally named (set_name parameter).

void PbMesh::addValuesSet ( int  set_index,
const float *  val,
DataBinding  binding,
const SbString &  set_name = "" 
)

Adds a set of scalar values that can be located either at nodes or at cells.

Warning: At this time, the PER_CELL data binding is taken into account only by the following classes:

The other classes use inherited coloring mode when the PER_CELL binding is used.

Parameters:
set_index the index of the new set added.
val the array of values. Its size must be either the number of nodes or the number of cells depending on the binding argument.
binding specifies the location of the values.
set_name string associated with this set of values.

NOTE: This method must be called after a setGeometry method because the size of the argument val is determined by the number of nodes in the mesh. The setGeometry methods are defined in subclasses of PbMesh.

virtual void PbMesh::addValuesSet ( int  set_index,
const float *  val,
const SbString &  set_name = "" 
) [virtual]

Adds a set of scalar values.

The values are located at nodes so the number of values in a set must be equal to the number of nodes in the mesh.

Parameters:
set_index the index of the new set added.
val the array of values. Its size must be the number of nodes.
set_name string associated with this set of values.

NOTE: This method must be called after a setGeometry method because the size of the argument val is determined by the number of nodes in the mesh. The setGeometry methods are defined in subclasses of PbMesh.

virtual void PbMesh::addVecsSet ( int  set_index,
const SbVec3f *  val,
const SbString &  set_name = "" 
) [virtual]

Adds a set of vector values .

The number of values in a set must be equal to the number of nodes in the mesh. The set can be optionally named (set_name parameter).

virtual const PbCell* PbMesh::findContainingCell ( const SbVec3f &  point,
float  tolerance,
SbVec3f &  pcoord 
) const [virtual]

Find the cell that contains the point.

If the (optional) adjacent cell is given, searching the containing cell starts by the cells around this adjacent one. Returns also the parametric coordinates of the point in the found cell. Parametric coordinates are the coordinates of the point relative to a topological equivalent unit cell. A point is inside a cell if its parametric coordinates range from 0 to 1. However we use a test with a tolerance value : a point is inside the cell if its parametric coordinates p verify -tolerance <= p <= 1+tolerance. Parametric coordinates are useful to interpolate the value in the cell (see PbCell::getValue). Attention! This method returns always the same address of an internal private cell. This private cell is updated each time findContainingCell is called.

Reimplemented in PbMesh1D, PbParalCartesianGrid2D, PbParalCartesianGrid3D, PbRegularCartesianGrid2D, and PbRegularCartesianGrid3D.

virtual const PbCell* PbMesh::findContainingCell ( const SbVec3f &  point,
float  tolerance,
SbVec3f &  pcoord,
const PbCell *  adjacent_cell 
) const [virtual]

Reimplemented in PbMesh1D, PbParalCartesianGrid2D, PbParalCartesianGrid3D, PbRegularCartesianGrid2D, and PbRegularCartesianGrid3D.

virtual void PbMesh::getAdjacentCellsIndByFacet ( int  cell_index,
PbArrayOfInt &  adjacent_cells 
) const [virtual]

Gets the list of indices of cells that are adjacent (by a facet) to cell_index.

Two cells are adjacent by a facet if they own at least one facet of the mesh in common

Reimplemented in PbGrid2D, PbGrid3D, and PbMesh1D.

virtual void PbMesh::getAdjacentCellsIndByNode ( int  cell_index,
PbArrayOfInt &  adjacent_cells 
) const [virtual]

Gets the list of indices of cells that are adjacent (by a node) to cell_index.

Two cells are adjacent by a node if they own at least one node of the mesh in common.

Reimplemented in PbGrid2D, PbGrid3D, and PbMesh1D.

virtual float PbMesh::getArea (  )  const [pure virtual]

Gets the area of the mesh.

Returns always 0 for a volume mesh

Implemented in PbMesh1D, PbMesh2D, PbMesh3D, PbParalCartesianGrid2D, and PbRegularCartesianGrid2D.

virtual SbBox3f PbMesh::getBiggestCellBox ( int &  cell_index  )  const [virtual]

Gets the biggest cell's bounding box, returns also the index of this cell.

SbBox3f PbMesh::getBoundingBox (  )  const [inline]

Gets the bounding box of the mesh.

Reimplemented in PbMesh2D.

virtual const PbCell* PbMesh::getCell ( int  cell_index  )  const [pure virtual]

Gets the cell with index cell_index.

Returns NULL if the cell does not exist. Attention! this method returns always the same adress of an internal private cell. This private cell is updated each time getCell is called.

Implemented in PbCartesianGrid2D, PbCartesianGrid3D, PbHexahedronMesh3D, PbIndexedMesh2D, PbIndexedMesh3D, PbMesh1D, PbParalCartesianGrid2D, PbParalCartesianGrid3D, PbPolarGrid2D, PbQuadrangleMesh2D, PbRegularCartesianGrid2D, PbRegularCartesianGrid3D, PbTetrahedronMesh3D, and PbTriangleMesh2D.

void PbMesh::getCoordinates ( const float *&  xnod,
const float *&  ynod,
const float *&  znod,
int &  size_xnod,
int &  size_ynod,
int &  size_znod 
) const [inline, virtual]

Get the current coordinates of the nodes of this mesh.

Parameters:
xnod array of x coord
ynod array of y coord
znod array of z coord
size_xnod size of the array xnod
size_ynod size of the array ynod
size_znod size of the array znod

Reimplemented in PbCartesianGrid3D, PbIndexedMesh3D, PbParalCartesianGrid3D, and PbRegularCartesianGrid3D.

virtual SbBool PbMesh::getMaxValuesSet ( int  set_index,
float &  max 
) const [virtual]

Gets the max of a set of scalars.

Returns:
FALSE if the scalar set does not exist,
TRUE otherwise.
virtual SbBool PbMesh::getMaxVecsSet ( int  set_index,
float &  max 
) const [virtual]

Gets the max module of a set of vectors.

Returns:
FALSE if the vector set does not exist,
TRUE otherwise.
virtual SbBool PbMesh::getMinValuesSet ( int  set_index,
float &  min 
) const [virtual]

Gets the min of a set of scalars.

Returns:
FALSE if the scalar set does not exist,
TRUE otherwise.
virtual SbBool PbMesh::getMinVecsSet ( int  set_index,
float &  min 
) const [virtual]

Gets the min module of a set of vectors.

Returns:
FALSE if the vector set does not exist,
TRUE otherwise.
virtual SbVec3f PbMesh::getNodeCoord ( int  nod_index  )  const [pure virtual]

Gets the coordinates of a node.

Implemented in PbCartesianGrid2D, PbCartesianGrid3D, PbGrid2D, PbGrid3D, PbIndexedMesh2D, PbIndexedMesh3D, PbIrregularMesh1D, PbParalCartesianGrid2D, PbParalCartesianGrid3D, PbPolarGrid2D, PbRegularCartesianGrid2D, PbRegularCartesianGrid3D, and PbRegularMesh1D.

virtual void PbMesh::getNodeOwnerCellsInd ( int  nod_index,
PbArrayOfInt &  owner_cells 
) const [pure virtual]

Gets the list of indices of cells that own the node "nod_index".

Implemented in PbGrid2D, PbGrid3D, PbIndexedMesh2D, PbIndexedMesh3D, and PbMesh1D.

virtual void PbMesh::getNodesOwnerCellsInd ( const PbArrayOfInt &  nod_indices,
PbArrayOfInt &  owner_cells 
) const [virtual]

Gets the list of indices of cells that own the list of nodes "nod_indices".

"nod_indices" can be the list of indices of a facet, an edge... For example, if "nod_indices" contains the 2 indices of the edge's nodes, getNodesOwnerCellsInd returns the list of cell's that own this edge.

Reimplemented in PbHexahedronMesh3D, PbMesh1D, PbQuadrangleMesh2D, PbTetrahedronMesh3D, and PbTriangleMesh2D.

int PbMesh::getNumCells (  )  const [inline]

Gets the number of cells in the mesh.

int PbMesh::getNumNodes (  )  const [inline]

Gets the number of nodes in the mesh.

virtual int PbMesh::getNumStringsSet (  )  const [virtual]

Gets the number of set of string values.

virtual int PbMesh::getNumValuesSet (  )  const [virtual]

Gets the number of set of scalar values.

virtual int PbMesh::getNumVecsSet (  )  const [virtual]

Gets the number of set of vector values.

virtual SbBox3f PbMesh::getSmallestCellBox ( int &  cell_index  )  const [virtual]

Gets the smallest cell's bounding box, returns also the index of this cell.

virtual const SbString* PbMesh::getStringsSet ( int  set_index  )  const [virtual]

Gets a set of string values.

virtual const SbString* PbMesh::getStringsSetName ( int  set_index  )  const [virtual]

Gets the name associated to a string values set.

NULL is returned if the set does not exist.

DataBinding PbMesh::getValuesBinding ( int  set_index  )  const

Gets the binding of the scalar value set.

Parameters:
set_index the index of the set of scalar values.
Returns:
PER_CELL or PER_NODE, or undefined binding if specified data set does not exist.
virtual const float* PbMesh::getValuesSet ( int  set_index  )  const [virtual]

Gets a set of scalar values.

virtual const SbString* PbMesh::getValuesSetName ( int  set_index  )  const [virtual]

Gets the name associated to a scalar values set.

NULL is returned if the set does not exist.

virtual const SbVec3f* PbMesh::getVecsSet ( int  set_index  )  const [virtual]

Gets a set of vector values.

virtual const SbString* PbMesh::getVecsSetName ( int  set_index  )  const [virtual]

Gets the name associated to a vec values set.

NULL is returned if the set does not exist.

virtual float PbMesh::getVolume (  )  const [pure virtual]

Gets the volume of the mesh.

Returns always 0 for a surface mesh

Implemented in PbMesh1D, PbMesh2D, PbMesh3D, PbParalCartesianGrid3D, and PbRegularCartesianGrid3D.

SbBool PbMesh::isDataDuplicated (  )  const [inline]

Returns TRUE if mesh's data are duplicated, FALSE otherwise.

If the data are not duplicated, the method addValuesSet, addStringsSet, addVecsSet save only the adress of the user data set. In this case, it user's responsibility to check the validity of data during the existence of the PbMesh object.

PbMesh& PbMesh::operator= ( const PbMesh &  mesh  ) 

Assignment operator.

Reimplemented from PbBase.

Reimplemented in PbCartesianGrid2D, PbCartesianGrid3D, PbGrid2D, PbGrid3D, PbHexahedronMesh3D, PbIndexedMesh2D, PbIndexedMesh3D, PbIrregularMesh1D, PbMesh1D, PbParalCartesianGrid2D, PbParalCartesianGrid3D, PbPolarGrid2D, PbQuadrangleMesh2D, PbRegularCartesianGrid2D, PbRegularCartesianGrid3D, PbRegularMesh1D, PbTetrahedronMesh3D, and PbTriangleMesh2D.

virtual void PbMesh::removeAllStringsSet (  )  [virtual]

Remove all sets of strings values.

virtual void PbMesh::removeAllValuesSet (  )  [virtual]

Remove all sets of scalar values.

virtual void PbMesh::removeAllVecsSet (  )  [virtual]

Remove all sets of vector values.

virtual SbBool PbMesh::removeStringsSet ( int  set_index  )  [virtual]

Remove a set of string values.

Returns:
FALSE if the scalar set does not exist,
TRUE otherwise.
virtual SbBool PbMesh::removeValuesSet ( int  set_index  )  [virtual]

Remove a set of scalar values.

Returns:
FALSE if the scalar set does not exist,
TRUE otherwise.
virtual SbBool PbMesh::removeVecsSet ( int  set_index  )  [virtual]

Remove a set of vector values.

Returns:
FALSE if the vector set does not exist,
TRUE otherwise.
void PbMesh::setCoordinates ( const float *  x_nod,
const float *  y_nod,
const float *  z_nod 
) [inline, virtual]

Set new node coordinates without modifying the mesh topology.

For performance reasons, this method should be called instead of setGeometry when doing a mesh deformation animation.

Reimplemented in PbCartesianGrid3D, PbIndexedMesh3D, PbParalCartesianGrid3D, and PbRegularCartesianGrid3D.

The documentation for this class was generated from the following file:
Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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