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vtkPolyData Class Reference

concrete dataset represents vertices, lines, polygons, and triangle strips More...

#include <vtkPolyData.h>

Inherits vtkPointSet.

Collaboration diagram for vtkPolyData:
[legend]

Public Types

typedef vtkPointSet Superclass
 

Public Member Functions

virtual int IsA (const char *type)
 
vtkPolyDataNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent)
 
int GetDataObjectType ()
 
void CopyStructure (vtkDataSet *ds)
 
void GetCellPoints (vtkIdType cellId, vtkIdList *ptIds)
 
void GetPointCells (vtkIdType ptId, vtkIdList *cellIds)
 
void ComputeBounds ()
 
void Squeeze ()
 
int GetMaxCellSize ()
 
void SetVerts (vtkCellArray *v)
 
vtkCellArray * GetVerts ()
 
void SetLines (vtkCellArray *l)
 
vtkCellArray * GetLines ()
 
void SetPolys (vtkCellArray *p)
 
vtkCellArray * GetPolys ()
 
void SetStrips (vtkCellArray *s)
 
vtkCellArray * GetStrips ()
 
void Allocate (vtkIdType numCells=1000, int extSize=1000)
 
int InsertNextCell (int type, int npts, vtkIdType *pts)
 
int InsertNextCell (int type, vtkIdList *pts)
 
void Reset ()
 
void BuildCells ()
 
void BuildLinks (int initialSize=0)
 
void DeleteCells ()
 
void DeleteLinks ()
 
void GetCellPoints (vtkIdType cellId, vtkIdType &npts, vtkIdType *&pts)
 
int IsTriangle (int v1, int v2, int v3)
 
int IsEdge (vtkIdType p1, vtkIdType p2)
 
int IsPointUsedByCell (vtkIdType ptId, vtkIdType cellId)
 
void ReplaceCell (vtkIdType cellId, int npts, vtkIdType *pts)
 
void ReverseCell (vtkIdType cellId)
 
void RemoveDeletedCells ()
 
int InsertNextLinkedCell (int type, int npts, vtkIdType *pts)
 
void ReplaceLinkedCell (vtkIdType cellId, int npts, vtkIdType *pts)
 
void RemoveCellReference (vtkIdType cellId)
 
void AddCellReference (vtkIdType cellId)
 
void RemoveReferenceToCell (vtkIdType ptId, vtkIdType cellId)
 
void AddReferenceToCell (vtkIdType ptId, vtkIdType cellId)
 
void ResizeCellList (vtkIdType ptId, int size)
 
virtual void Initialize ()
 
virtual int GetGhostLevel ()
 
unsigned long GetActualMemorySize ()
 
void RemoveGhostCells (int level)
 
vtkIdType GetNumberOfCells ()
 
vtkCell * GetCell (vtkIdType cellId)
 
void GetCell (vtkIdType cellId, vtkGenericCell *cell)
 
int GetCellType (vtkIdType cellId)
 
void GetCellBounds (vtkIdType cellId, double bounds[6])
 
void GetCellNeighbors (vtkIdType cellId, vtkIdList *ptIds, vtkIdList *cellIds)
 
void CopyCells (vtkPolyData *pd, vtkIdList *idList, vtkPointLocator *locator=NULL)
 
vtkIdType GetNumberOfVerts ()
 
vtkIdType GetNumberOfLines ()
 
vtkIdType GetNumberOfPolys ()
 
vtkIdType GetNumberOfStrips ()
 
void Allocate (vtkPolyData *inPolyData, vtkIdType numCells=1000, int extSize=1000)
 
void GetPointCells (vtkIdType ptId, unsigned short &ncells, vtkIdType *&cells)
 
void GetCellEdgeNeighbors (vtkIdType cellId, vtkIdType p1, vtkIdType p2, vtkIdList *cellIds)
 
void ReplaceCellPoint (vtkIdType cellId, vtkIdType oldPtId, vtkIdType newPtId)
 
void DeletePoint (vtkIdType ptId)
 
void DeleteCell (vtkIdType cellId)
 
int InsertNextLinkedPoint (int numLinks)
 
int InsertNextLinkedPoint (double x[3], int numLinks)
 
virtual int GetPiece ()
 
virtual int GetNumberOfPieces ()
 
void ShallowCopy (vtkDataObject *src)
 
void DeepCopy (vtkDataObject *src)
 

Static Public Member Functions

static vtkPolyDataNew ()
 
static int IsTypeOf (const char *type)
 
static vtkPolyDataSafeDownCast (vtkObjectBase *o)
 
static vtkPolyDataGetData (vtkInformation *info)
 
static vtkPolyDataGetData (vtkInformationVector *v, int i=0)
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkPolyData ()
 
 ~vtkPolyData ()
 

Protected Attributes

vtkVertex * Vertex
 
vtkPolyVertex * PolyVertex
 
vtkLine * Line
 
vtkPolyLinePolyLine
 
vtkTriangle * Triangle
 
vtkQuad * Quad
 
vtkPolygonPolygon
 
vtkTriangleStrip * TriangleStrip
 
vtkEmptyCell * EmptyCell
 
vtkCellArray * Verts
 
vtkCellArray * Lines
 
vtkCellArray * Polys
 
vtkCellArray * Strips
 
vtkCellTypes * Cells
 
vtkCellLinks * Links
 

Static Protected Attributes

static vtkCellArray * Dummy
 
enum  {
  ERR_NO_SUCH_FIELD = -4, ERR_INCORRECT_FIELD = -3, ERR_NON_MANIFOLD_STAR = -2, REGULAR_POINT = -1,
  MINIMUM = 0, SADDLE = 1, MAXIMUM = 2
}
 
int GetScalarFieldCriticalIndex (vtkIdType pointId, vtkDataArray *scalarField)
 
int GetScalarFieldCriticalIndex (vtkIdType pointId, int fieldId)
 
int GetScalarFieldCriticalIndex (vtkIdType pointId, const char *fieldName)
 

Detailed Description

concrete dataset represents vertices, lines, polygons, and triangle strips

vtkPolyData is a data object that is a concrete implementation of vtkDataSet. vtkPolyData represents a geometric structure consisting of vertices, lines, polygons, and/or triangle strips. Point and cell attribute values (e.g., scalars, vectors, etc.) also are represented.

The actual cell types (vtkCellType.h) supported by vtkPolyData are: vtkVertex, vtkPolyVertex, vtkLine, vtkPolyLine, vtkTriangle, vtkQuad, vtkPolygon, and vtkTriangleStrip.

One important feature of vtkPolyData objects is that special traversal and data manipulation methods are available to process data. These methods are generally more efficient than vtkDataSet methods and should be used whenever possible. For example, traversing the cells in a dataset we would use GetCell(). To traverse cells with vtkPolyData we would retrieve the cell array object representing polygons (for example using GetPolys()) and then use vtkCellArray's InitTraversal() and GetNextCell() methods.

Warning
Because vtkPolyData is implemented with four separate instances of vtkCellArray to represent 0D vertices, 1D lines, 2D polygons, and 2D triangle strips, it is possible to create vtkPolyData instances that consist of a mixture of cell types. Because of the design of the class, there are certain limitations on how mixed cell types are inserted into the vtkPolyData, and in turn the order in which they are processed and rendered. To preserve the consistency of cell ids, and to insure that cells with cell data are rendered properly, users must insert mixed cells in the order of vertices (vtkVertex and vtkPolyVertex), lines (vtkLine and vtkPolyLine), polygons (vtkTriangle, vtkQuad, vtkPolygon), and triangle strips (vtkTriangleStrip).
Some filters when processing vtkPolyData with mixed cell types may process the cells in differing ways. Some will convert one type into another (e.g., vtkTriangleStrip into vtkTriangles) or expect a certain type (vtkDecimatePro expects triangles or triangle strips; vtkTubeFilter expects lines). Read the documentation for each filter carefully to understand how each part of vtkPolyData is processed.
Examples:
vtkPolyData (Examples)
Tests:
vtkPolyData (Tests)

Definition at line 82 of file vtkPolyData.h.

Member Typedef Documentation

typedef vtkPointSet vtkPolyData::Superclass

Definition at line 87 of file vtkPolyData.h.

Member Enumeration Documentation

anonymous enum

Scalar field critical point classification (for manifold 2D meshes). Reference: J. Milnor "Morse Theory", Princeton University Press,

  1. Given a pointId and an attribute representing a scalar field, this member returns the index of the critical point: vtkPolyData::MINIMUM (index 0): local minimum; vtkPolyData::SADDLE (index 1): local saddle; vtkPolyData::MAXIMUM (index 2): local maximum. Other returned values are: vtkPolyData::REGULAR_POINT: regular point (the gradient does not vanish); vtkPolyData::ERR_NON_MANIFOLD_STAR: the star of the considered vertex is not manifold (could not evaluate the index) vtkPolyData::ERR_INCORRECT_FIELD: the number of entries in the scalar field array is different form the number of vertices in the mesh. vtkPolyData::ERR_NO_SUCH_FIELD: the specified scalar field does not exist.
Enumerator
ERR_NO_SUCH_FIELD 
ERR_INCORRECT_FIELD 
ERR_NON_MANIFOLD_STAR 
REGULAR_POINT 
MINIMUM 
SADDLE 
MAXIMUM 

Definition at line 403 of file vtkPolyData.h.

Constructor & Destructor Documentation

vtkPolyData::vtkPolyData ( )
protected
vtkPolyData::~vtkPolyData ( )
protected

Member Function Documentation

static vtkPolyData* vtkPolyData::New ( )
static
static int vtkPolyData::IsTypeOf ( const char *  type)
static
virtual int vtkPolyData::IsA ( const char *  type)
virtual
static vtkPolyData* vtkPolyData::SafeDownCast ( vtkObjectBase o)
static
virtual vtkObjectBase* vtkPolyData::NewInstanceInternal ( ) const
protectedvirtual
vtkPolyData* vtkPolyData::NewInstance ( ) const
void vtkPolyData::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
int vtkPolyData::GetDataObjectType ( )
inline

Return what type of dataset this is.

Definition at line 91 of file vtkPolyData.h.

void vtkPolyData::CopyStructure ( vtkDataSet *  ds)

Copy the geometric and topological structure of an input poly data object.

vtkIdType vtkPolyData::GetNumberOfCells ( )

Standard vtkDataSet interface.

vtkCell* vtkPolyData::GetCell ( vtkIdType  cellId)

Standard vtkDataSet interface.

void vtkPolyData::GetCell ( vtkIdType  cellId,
vtkGenericCell *  cell 
)

Standard vtkDataSet interface.

int vtkPolyData::GetCellType ( vtkIdType  cellId)

Standard vtkDataSet interface.

void vtkPolyData::GetCellBounds ( vtkIdType  cellId,
double  bounds[6] 
)

Standard vtkDataSet interface.

void vtkPolyData::GetCellNeighbors ( vtkIdType  cellId,
vtkIdList ptIds,
vtkIdList cellIds 
)

Standard vtkDataSet interface.

void vtkPolyData::CopyCells ( vtkPolyData pd,
vtkIdList idList,
vtkPointLocator *  locator = NULL 
)

Copy cells listed in idList from pd, including points, point data, and cell data. This method assumes that point and cell data have been allocated. If you pass in a point locator, then the points won't be duplicated in the output.

void vtkPolyData::GetCellPoints ( vtkIdType  cellId,
vtkIdList ptIds 
)

Copy a cells point ids into list provided. (Less efficient.)

void vtkPolyData::GetPointCells ( vtkIdType  ptId,
vtkIdList cellIds 
)

Efficient method to obtain cells using a particular point. Make sure that routine BuildLinks() has been called.

void vtkPolyData::ComputeBounds ( )

Compute the (X, Y, Z) bounds of the data.

void vtkPolyData::Squeeze ( )

Recover extra allocated memory when creating data whose initial size is unknown. Examples include using the InsertNextCell() method, or when using the CellArray::EstimateSize() method to create vertices, lines, polygons, or triangle strips.

int vtkPolyData::GetMaxCellSize ( )

Return the maximum cell size in this poly data.

void vtkPolyData::SetVerts ( vtkCellArray *  v)

Set the cell array defining vertices.

vtkCellArray* vtkPolyData::GetVerts ( )

Get the cell array defining vertices. If there are no vertices, an empty array will be returned (convenience to simplify traversal).

void vtkPolyData::SetLines ( vtkCellArray *  l)

Set the cell array defining lines.

vtkCellArray* vtkPolyData::GetLines ( )

Get the cell array defining lines. If there are no lines, an empty array will be returned (convenience to simplify traversal).

void vtkPolyData::SetPolys ( vtkCellArray *  p)

Set the cell array defining polygons.

vtkCellArray* vtkPolyData::GetPolys ( )

Get the cell array defining polygons. If there are no polygons, an empty array will be returned (convenience to simplify traversal).

void vtkPolyData::SetStrips ( vtkCellArray *  s)

Set the cell array defining triangle strips.

vtkCellArray* vtkPolyData::GetStrips ( )

Get the cell array defining triangle strips. If there are no triangle strips, an empty array will be returned (convenience to simplify traversal).

vtkIdType vtkPolyData::GetNumberOfVerts ( )

Return the number of primitives of a particular type held..

vtkIdType vtkPolyData::GetNumberOfLines ( )

Return the number of primitives of a particular type held..

vtkIdType vtkPolyData::GetNumberOfPolys ( )

Return the number of primitives of a particular type held..

vtkIdType vtkPolyData::GetNumberOfStrips ( )

Return the number of primitives of a particular type held..

void vtkPolyData::Allocate ( vtkIdType  numCells = 1000,
int  extSize = 1000 
)

Method allocates initial storage for vertex, line, polygon, and triangle strip arrays. Use this method before the method PolyData::InsertNextCell(). (Or, provide vertex, line, polygon, and triangle strip cell arrays.) The array capacity is doubled when the inserting a cell exceeds the current capacity. extSize is no longer used.

void vtkPolyData::Allocate ( vtkPolyData inPolyData,
vtkIdType  numCells = 1000,
int  extSize = 1000 
)

Similar to the method above, this method allocates initial storage for vertex, line, polygon, and triangle strip arrays. It does this more intelligently, examining the supplied inPolyData to determine whether to allocate the verts, lines, polys, and strips arrays. (These arrays are allocated only if there is data in the corresponding arrays in the inPolyData.) Caution: if the inPolyData has no verts, and after allocating with this method an PolyData::InsertNextCell() is invoked where a vertex is inserted, bad things will happen.

int vtkPolyData::InsertNextCell ( int  type,
int  npts,
vtkIdType pts 
)

Insert a cell of type VTK_VERTEX, VTK_POLY_VERTEX, VTK_LINE, VTK_POLY_LINE, VTK_TRIANGLE, VTK_QUAD, VTK_POLYGON, or VTK_TRIANGLE_STRIP. Make sure that the PolyData::Allocate() function has been called first or that vertex, line, polygon, and triangle strip arrays have been supplied. Note: will also insert VTK_PIXEL, but converts it to VTK_QUAD.

int vtkPolyData::InsertNextCell ( int  type,
vtkIdList pts 
)

Insert a cell of type VTK_VERTEX, VTK_POLY_VERTEX, VTK_LINE, VTK_POLY_LINE, VTK_TRIANGLE, VTK_QUAD, VTK_POLYGON, or VTK_TRIANGLE_STRIP. Make sure that the PolyData::Allocate() function has been called first or that vertex, line, polygon, and triangle strip arrays have been supplied. Note: will also insert VTK_PIXEL, but converts it to VTK_QUAD.

void vtkPolyData::Reset ( )

Begin inserting data all over again. Memory is not freed but otherwise objects are returned to their initial state.

void vtkPolyData::BuildCells ( )

Create data structure that allows random access of cells.

void vtkPolyData::BuildLinks ( int  initialSize = 0)

Create upward links from points to cells that use each point. Enables topologically complex queries. Normally the links array is allocated based on the number of points in the vtkPolyData. The optional initialSize parameter can be used to allocate a larger size initially.

void vtkPolyData::DeleteCells ( )

Release data structure that allows random access of the cells. This must be done before a 2nd call to BuildLinks(). DeleteCells implicitly deletes the links as well since they are no longer valid.

void vtkPolyData::DeleteLinks ( )

Release the upward links from point to cells that use each point.

void vtkPolyData::GetPointCells ( vtkIdType  ptId,
unsigned short &  ncells,
vtkIdType *&  cells 
)
inline

Special (efficient) operations on poly data. Use carefully.

Definition at line 466 of file vtkPolyData.h.

void vtkPolyData::GetCellEdgeNeighbors ( vtkIdType  cellId,
vtkIdType  p1,
vtkIdType  p2,
vtkIdList cellIds 
)

Get the neighbors at an edge. More efficient than the general GetCellNeighbors(). Assumes links have been built (with BuildLinks()), and looks specifically for edge neighbors.

void vtkPolyData::GetCellPoints ( vtkIdType  cellId,
vtkIdType npts,
vtkIdType *&  pts 
)

Return a pointer to a list of point ids defining cell. (More efficient.) Assumes that cells have been built (with BuildCells()).

int vtkPolyData::IsTriangle ( int  v1,
int  v2,
int  v3 
)
inline

Given three vertices, determine whether it's a triangle. Make sure BuildLinks() has been called first.

Definition at line 473 of file vtkPolyData.h.

int vtkPolyData::IsEdge ( vtkIdType  p1,
vtkIdType  p2 
)

Determine whether two points form an edge. If they do, return non-zero. By definition PolyVertex and PolyLine have no edges since 1-dimensional edges are only found on cells 2D and higher. Edges are defined as 1-D boundary entities to cells. Make sure BuildLinks() has been called first.

int vtkPolyData::IsPointUsedByCell ( vtkIdType  ptId,
vtkIdType  cellId 
)
inline

Determine whether a point is used by a particular cell. If it is, return non-zero. Make sure BuildCells() has been called first.

Definition at line 503 of file vtkPolyData.h.

void vtkPolyData::ReplaceCell ( vtkIdType  cellId,
int  npts,
vtkIdType pts 
)

Replace the points defining cell "cellId" with a new set of points. This operator is (typically) used when links from points to cells have not been built (i.e., BuildLinks() has not been executed). Use the operator ReplaceLinkedCell() to replace a cell when cell structure has been built.

void vtkPolyData::ReplaceCellPoint ( vtkIdType  cellId,
vtkIdType  oldPtId,
vtkIdType  newPtId 
)
inline

Replace a point in the cell connectivity list with a different point.

Definition at line 556 of file vtkPolyData.h.

void vtkPolyData::ReverseCell ( vtkIdType  cellId)

Reverse the order of point ids defining the cell.

void vtkPolyData::DeletePoint ( vtkIdType  ptId)
inline

Mark a point/cell as deleted from this vtkPolyData.

Definition at line 519 of file vtkPolyData.h.

void vtkPolyData::DeleteCell ( vtkIdType  cellId)
inline

Mark a point/cell as deleted from this vtkPolyData.

Definition at line 524 of file vtkPolyData.h.

void vtkPolyData::RemoveDeletedCells ( )

The cells marked by calls to DeleteCell are stored in the Cell Array VTK_EMPTY_CELL, but they still exist in the cell arrays. Calling RemoveDeletedCells will traverse the cell arrays and remove/compact the cell arrays as well as any cell data thus truly removing the cells from the polydata object.

int vtkPolyData::InsertNextLinkedPoint ( int  numLinks)

Add a point to the cell data structure (after cell pointers have been built). This method adds the point and then allocates memory for the links to the cells. (To use this method, make sure points are available and BuildLinks() has been invoked.) Of the two methods below, one inserts a point coordinate and the other just makes room for cell links.

int vtkPolyData::InsertNextLinkedPoint ( double  x[3],
int  numLinks 
)

Add a point to the cell data structure (after cell pointers have been built). This method adds the point and then allocates memory for the links to the cells. (To use this method, make sure points are available and BuildLinks() has been invoked.) Of the two methods below, one inserts a point coordinate and the other just makes room for cell links.

int vtkPolyData::InsertNextLinkedCell ( int  type,
int  npts,
vtkIdType pts 
)

Add a new cell to the cell data structure (after cell pointers have been built). This method adds the cell and then updates the links from the points to the cells. (Memory is allocated as necessary.)

void vtkPolyData::ReplaceLinkedCell ( vtkIdType  cellId,
int  npts,
vtkIdType pts 
)

Replace one cell with another in cell structure. This operator updates the connectivity list and the point's link list. It does not delete references to the old cell in the point's link list. Use the operator RemoveCellReference() to delete all references from points to (old) cell. You may also want to consider using the operator ResizeCellList() if the link list is changing size.

void vtkPolyData::RemoveCellReference ( vtkIdType  cellId)
inline

Remove all references to cell in cell structure. This means the links from the cell's points to the cell are deleted. Memory is not reclaimed. Use the method ResizeCellList() to resize the link list from a point to its using cells. (This operator assumes BuildLinks() has been called.)

Definition at line 529 of file vtkPolyData.h.

void vtkPolyData::AddCellReference ( vtkIdType  cellId)
inline

Add references to cell in cell structure. This means the links from the cell's points to the cell are modified. Memory is not extended. Use the method ResizeCellList() to resize the link list from a point to its using cells. (This operator assumes BuildLinks() has been called.)

Definition at line 540 of file vtkPolyData.h.

void vtkPolyData::RemoveReferenceToCell ( vtkIdType  ptId,
vtkIdType  cellId 
)

Remove a reference to a cell in a particular point's link list. You may also consider using RemoveCellReference() to remove the references from all the cell's points to the cell. This operator does not reallocate memory; use the operator ResizeCellList() to do this if necessary.

void vtkPolyData::AddReferenceToCell ( vtkIdType  ptId,
vtkIdType  cellId 
)

Add a reference to a cell in a particular point's link list. (You may also consider using AddCellReference() to add the references from all the cell's points to the cell.) This operator does not realloc memory; use the operator ResizeCellList() to do this if necessary.

void vtkPolyData::ResizeCellList ( vtkIdType  ptId,
int  size 
)
inline

Resize the list of cells using a particular point. (This operator assumes that BuildLinks() has been called.)

Definition at line 551 of file vtkPolyData.h.

virtual void vtkPolyData::Initialize ( )
virtual

Restore object to initial state. Release memory back to system.

virtual int vtkPolyData::GetPiece ( )
virtual

Get the piece and the number of pieces. Similar to extent in 3D.

virtual int vtkPolyData::GetNumberOfPieces ( )
virtual

Get the piece and the number of pieces. Similar to extent in 3D.

virtual int vtkPolyData::GetGhostLevel ( )
virtual

Get the ghost level.

unsigned long vtkPolyData::GetActualMemorySize ( )

Return the actual size of the data in kilobytes. This number is valid only after the pipeline has updated. The memory size returned is guaranteed to be greater than or equal to the memory required to represent the data (e.g., extra space in arrays, etc. are not included in the return value). THIS METHOD IS THREAD SAFE.

void vtkPolyData::ShallowCopy ( vtkDataObject src)

Shallow and Deep copy.

void vtkPolyData::DeepCopy ( vtkDataObject src)

Shallow and Deep copy.

void vtkPolyData::RemoveGhostCells ( int  level)

This method will remove any cell that has a ghost level array value greater or equal to level. It does not remove unused points (yet).

static vtkPolyData* vtkPolyData::GetData ( vtkInformation info)
static

Retrieve an instance of this class from an information object.

static vtkPolyData* vtkPolyData::GetData ( vtkInformationVector v,
int  i = 0 
)
static

Retrieve an instance of this class from an information object.

int vtkPolyData::GetScalarFieldCriticalIndex ( vtkIdType  pointId,
vtkDataArray scalarField 
)

Scalar field critical point classification (for manifold 2D meshes). Reference: J. Milnor "Morse Theory", Princeton University Press,

  1. Given a pointId and an attribute representing a scalar field, this member returns the index of the critical point: vtkPolyData::MINIMUM (index 0): local minimum; vtkPolyData::SADDLE (index 1): local saddle; vtkPolyData::MAXIMUM (index 2): local maximum. Other returned values are: vtkPolyData::REGULAR_POINT: regular point (the gradient does not vanish); vtkPolyData::ERR_NON_MANIFOLD_STAR: the star of the considered vertex is not manifold (could not evaluate the index) vtkPolyData::ERR_INCORRECT_FIELD: the number of entries in the scalar field array is different form the number of vertices in the mesh. vtkPolyData::ERR_NO_SUCH_FIELD: the specified scalar field does not exist.
int vtkPolyData::GetScalarFieldCriticalIndex ( vtkIdType  pointId,
int  fieldId 
)

Scalar field critical point classification (for manifold 2D meshes). Reference: J. Milnor "Morse Theory", Princeton University Press,

  1. Given a pointId and an attribute representing a scalar field, this member returns the index of the critical point: vtkPolyData::MINIMUM (index 0): local minimum; vtkPolyData::SADDLE (index 1): local saddle; vtkPolyData::MAXIMUM (index 2): local maximum. Other returned values are: vtkPolyData::REGULAR_POINT: regular point (the gradient does not vanish); vtkPolyData::ERR_NON_MANIFOLD_STAR: the star of the considered vertex is not manifold (could not evaluate the index) vtkPolyData::ERR_INCORRECT_FIELD: the number of entries in the scalar field array is different form the number of vertices in the mesh. vtkPolyData::ERR_NO_SUCH_FIELD: the specified scalar field does not exist.
int vtkPolyData::GetScalarFieldCriticalIndex ( vtkIdType  pointId,
const char *  fieldName 
)

Scalar field critical point classification (for manifold 2D meshes). Reference: J. Milnor "Morse Theory", Princeton University Press,

  1. Given a pointId and an attribute representing a scalar field, this member returns the index of the critical point: vtkPolyData::MINIMUM (index 0): local minimum; vtkPolyData::SADDLE (index 1): local saddle; vtkPolyData::MAXIMUM (index 2): local maximum. Other returned values are: vtkPolyData::REGULAR_POINT: regular point (the gradient does not vanish); vtkPolyData::ERR_NON_MANIFOLD_STAR: the star of the considered vertex is not manifold (could not evaluate the index) vtkPolyData::ERR_INCORRECT_FIELD: the number of entries in the scalar field array is different form the number of vertices in the mesh. vtkPolyData::ERR_NO_SUCH_FIELD: the specified scalar field does not exist.

Member Data Documentation

vtkVertex* vtkPolyData::Vertex
protected

Definition at line 425 of file vtkPolyData.h.

vtkPolyVertex* vtkPolyData::PolyVertex
protected

Definition at line 426 of file vtkPolyData.h.

vtkLine* vtkPolyData::Line
protected

Definition at line 427 of file vtkPolyData.h.

vtkPolyLine* vtkPolyData::PolyLine
protected

Definition at line 428 of file vtkPolyData.h.

vtkTriangle* vtkPolyData::Triangle
protected

Definition at line 429 of file vtkPolyData.h.

vtkQuad* vtkPolyData::Quad
protected

Definition at line 430 of file vtkPolyData.h.

vtkPolygon* vtkPolyData::Polygon
protected

Definition at line 431 of file vtkPolyData.h.

vtkTriangleStrip* vtkPolyData::TriangleStrip
protected

Definition at line 432 of file vtkPolyData.h.

vtkEmptyCell* vtkPolyData::EmptyCell
protected

Definition at line 433 of file vtkPolyData.h.

vtkCellArray* vtkPolyData::Verts
protected

Definition at line 437 of file vtkPolyData.h.

vtkCellArray* vtkPolyData::Lines
protected

Definition at line 438 of file vtkPolyData.h.

vtkCellArray* vtkPolyData::Polys
protected

Definition at line 439 of file vtkPolyData.h.

vtkCellArray* vtkPolyData::Strips
protected

Definition at line 440 of file vtkPolyData.h.

vtkCellArray* vtkPolyData::Dummy
staticprotected

Definition at line 443 of file vtkPolyData.h.

vtkCellTypes* vtkPolyData::Cells
protected

Definition at line 447 of file vtkPolyData.h.

vtkCellLinks* vtkPolyData::Links
protected

Definition at line 448 of file vtkPolyData.h.


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