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vtkDataSet Class Reference

abstract class to specify dataset behavior. More...

#include <vtkDataSet.h>

Inheritance diagram for vtkDataSet:

[legend]Collaboration diagram for vtkDataSet:

Public Types
enum	FieldDataType { DATA_OBJECT_FIELD = 0, POINT_DATA_FIELD = 1, CELL_DATA_FIELD = 2 }
Public Methods
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
virtual void	CopyStructure (vtkDataSet *ds)=0
virtual vtkIdType	GetNumberOfPoints ()=0
virtual vtkIdType	GetNumberOfCells ()=0
virtual float *	GetPoint (vtkIdType ptId)=0
virtual void	GetPoint (vtkIdType id, float x[3])
virtual vtkCell *	GetCell (vtkIdType cellId)=0
virtual void	GetCell (vtkIdType cellId, vtkGenericCell *cell)=0
virtual void	GetCellBounds (vtkIdType cellId, float bounds[6])
virtual int	GetCellType (vtkIdType cellId)=0
virtual void	GetCellTypes (vtkCellTypes *types)
virtual void	GetCellPoints (vtkIdType cellId, vtkIdList *ptIds)=0
virtual void	GetPointCells (vtkIdType ptId, vtkIdList *cellIds)=0
unsigned long int	GetMTime ()
vtkCellData *	GetCellData ()
vtkPointData *	GetPointData ()
virtual void	Squeeze ()
virtual void	ComputeBounds ()
float *	GetBounds ()
void	GetBounds (float bounds[6])
float *	GetCenter ()
void	GetCenter (float center[3])
float	GetLength ()
void	Initialize ()
virtual void	GetScalarRange (float range[2])
float *	GetScalarRange ()
virtual int	GetMaxCellSize ()=0
unsigned long	GetActualMemorySize ()

virtual void	GetCellNeighbors (vtkIdType cellId, vtkIdList ptIds, vtkIdList cellIds)

vtkIdType	FindPoint (float x, float y, float z)
virtual vtkIdType	FindPoint (float x[3])=0

virtual vtkIdType	FindCell (float x[3], vtkCell cell, vtkIdType cellId, float tol2, int &subId, float pcoords[3], float weights)=0

virtual vtkIdType	FindCell (float x[3], vtkCell cell, vtkGenericCell gencell, vtkIdType cellId, float tol2, int &subId, float pcoords[3], float *weights)=0

virtual vtkCell *	FindAndGetCell (float x[3], vtkCell cell, vtkIdType cellId, float tol2, int &subId, float pcoords[3], float weights)

int	GetDataObjectType ()

void	ShallowCopy (vtkDataObject *src)
void	DeepCopy (vtkDataObject *src)
Static Public Methods
int	IsTypeOf (const char *type)
vtkDataSet *	SafeDownCast (vtkObject *o)
Protected Methods
	vtkDataSet ()
	~vtkDataSet ()
Protected Attributes
vtkCellData *	CellData
vtkPointData *	PointData
vtkTimeStamp	ComputeTime
float	Bounds [6]
float	ScalarRange [2]
float	Center [3]

Detailed Description

abstract class to specify dataset behavior.

Date:: 2001/11/13 14:09:24

Revision:: 1.109

vtkDataSet is an abstract class that specifies an interface for dataset objects. vtkDataSet also provides methods to provide informations about the data, such as center, bounding box, and representative length.

In vtk a dataset consists of a structure (geometry and topology) and attribute data. The structure is defined implicitly or explicitly as a collection of cells. The geometry of the structure is contained in point coordinates plus the cell interpolation functions. The topology of the dataset structure is defined by cell types and how the cells share their defining points.

Attribute data in vtk is either point data (data at points) or cell data (data at cells). Typically filters operate on point data, but some may operate on cell data, both cell and point data, either one, or none.

See also:: vtkPointSet vtkStructuredPoints vtkStructuredGrid vtkUnstructuredGrid vtkRectilinearGrid vtkPolyData vtkPointData vtkCellData vtkDataObject vtkField

Examples:: vtkDataSet (Examples)

Definition at line 79 of file vtkDataSet.h.

Member Enumeration Documentation

enum vtkDataSet::FieldDataType

Enumeration values:

DATA_OBJECT_FIELD

POINT_DATA_FIELD

CELL_DATA_FIELD

Definition at line 293 of file vtkDataSet.h.

Constructor & Destructor Documentation

vtkDataSet::vtkDataSet ( ) [protected]

vtkDataSet::~vtkDataSet ( ) [protected]

Member Function Documentation

virtual const char* vtkDataSet::GetClassName ( ) [virtual]

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkStructuredPoints, vtkUnstructuredGrid, and vtkImageCanvasSource2D.

int vtkDataSet::IsTypeOf ( const char * type ) [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkStructuredPoints, vtkUnstructuredGrid, and vtkImageCanvasSource2D.

virtual int vtkDataSet::IsA ( const char * type ) [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkStructuredPoints, vtkUnstructuredGrid, and vtkImageCanvasSource2D.

vtkDataSet* vtkDataSet::SafeDownCast ( vtkObject * o ) [static]

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkStructuredPoints, vtkUnstructuredGrid, and vtkImageCanvasSource2D.

void vtkDataSet::PrintSelf ( ostream & os,

vtkIndent indent

) [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkUnstructuredGrid, and vtkImageCanvasSource2D.

virtual void vtkDataSet::CopyStructure ( vtkDataSet * ds ) [pure virtual]

Copy the geometric and topological structure of an object. Note that the invoking object and the object pointed to by the parameter ds must be of the same type. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual vtkIdType vtkDataSet::GetNumberOfPoints ( ) [pure virtual]

Determine the number of points composing the dataset. THIS METHOD IS THREAD SAFE
Reimplemented in vtkImageData, vtkPointSet, vtkRectilinearGrid, and vtkStructuredGrid.

virtual vtkIdType vtkDataSet::GetNumberOfCells ( ) [pure virtual]

Determine the number of cells composing the dataset. THIS METHOD IS THREAD SAFE
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual float* vtkDataSet::GetPoint ( vtkIdType ptId ) [pure virtual]

Get point coordinates with ptId such that: 0 <= ptId < NumberOfPoints. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, vtkPointSet, vtkRectilinearGrid, and vtkStructuredGrid.
Referenced by GetPoint().

void vtkDataSet::GetPoint ( vtkIdType ptId,

float p[3]

) [inline, virtual]

Copy point coordinates into user provided array x[3] for specified point id. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPointSet, vtkRectilinearGrid, and vtkStructuredGrid.
Definition at line 320 of file vtkDataSet.h.

virtual vtkCell* vtkDataSet::GetCell ( vtkIdType cellId ) [pure virtual]

Get cell with cellId such that: 0 <= cellId < NumberOfCells. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetCell ( vtkIdType cellId,

vtkGenericCell * cell

) [pure virtual]

Get cell with cellId such that: 0 <= cellId < NumberOfCells. This is a thread-safe alternative to the previous GetCell() method. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetCellBounds ( vtkIdType cellId,

float bounds[6]

) [virtual]

Get the bounds of the cell with cellId such that: 0 <= cellId < NumberOfCells. A subclass may be able to determine the bounds of cell without using an expensive GetCell() method. A default implementation is provided that actually uses a GetCell() call. This is to ensure the method is available to all datasets. Subclasses should override this method to provide an efficient implementation. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual int vtkDataSet::GetCellType ( vtkIdType cellId ) [pure virtual]

Get type of cell with cellId such that: 0 <= cellId < NumberOfCells. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetCellTypes ( vtkCellTypes * types ) [virtual]

Get a list of types of cells in a dataset. The list consists of an array of types (not necessarily in any order), with a single entry per type. For example a dataset 5 triangles, 3 lines, and 100 hexahedra would result a list of three entries, corresponding to the types VTK_TRIANGLE, VTK_LINE, and VTK_HEXAHEDRON. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED

virtual void vtkDataSet::GetCellPoints ( vtkIdType cellId,

vtkIdList * ptIds

) [pure virtual]

Topological inquiry to get points defining cell. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetPointCells ( vtkIdType ptId,

vtkIdList * cellIds

) [pure virtual]

Topological inquiry to get cells using point. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetCellNeighbors ( vtkIdType cellId,

vtkIdList * ptIds,

vtkIdList * cellIds

) [virtual]

Topological inquiry to get all cells using list of points exclusive of cell specified (e.g., cellId). Note that the list consists of only cells that use ALL the points provided. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.
Referenced by vtkUnstructuredGrid::Locations(), and vtkRectilinearGrid::PointReturn().

vtkIdType vtkDataSet::FindPoint ( float x,

float y,

float z

) [inline]

Locate the closest point to the global coordinate x. Return the point id. If point id < 0; then no point found. (This may arise when point is outside of dataset.) THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPointSet, and vtkRectilinearGrid.
Definition at line 165 of file vtkDataSet.h.
Referenced by vtkRectilinearGrid::FindPoint(), vtkPointSet::FindPoint(), and vtkImageData::FindPoint().

virtual vtkIdType vtkDataSet::FindPoint ( float x[3] ) [pure virtual]

Locate the closest point to the global coordinate x. Return the point id. If point id < 0; then no point found. (This may arise when point is outside of dataset.) THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPointSet, and vtkRectilinearGrid.

virtual vtkIdType vtkDataSet::FindCell ( float x[3],

vtkCell * cell,

vtkIdType cellId,

float tol2,

int & subId,

float pcoords[3],

float * weights

) [pure virtual]

Locate cell based on global coordinate x and tolerance squared. If cell and cellId is non-NULL, then search starts from this cell and looks at immediate neighbors. Returns cellId >= 0 if inside, < 0 otherwise. The parametric coordinates are provided in pcoords[3]. The interpolation weights are returned in weights[]. (The number of weights is equal to the number of points in the found cell). Tolerance is used to control how close the point is to be considered "in" the cell. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, vtkPointSet, and vtkRectilinearGrid.

virtual vtkIdType vtkDataSet::FindCell ( float x[3],

vtkCell * cell,

vtkGenericCell * gencell,

vtkIdType cellId,

float tol2,

int & subId,

float pcoords[3],

float * weights

) [pure virtual]

This is a version of the above method that can be used with multithreaded applications. A vtkGenericCell must be passed in to be used in internal calls that might be made to GetCell() THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkImageData, vtkPointSet, and vtkRectilinearGrid.

virtual vtkCell* vtkDataSet::FindAndGetCell ( float x[3],

vtkCell * cell,

vtkIdType cellId,

float tol2,

int & subId,

float pcoords[3],

float * weights

) [virtual]

Locate the cell that contains a point and return the cell. Also returns the subcell id, parametric coordinates and weights for subsequent interpolation. This method combines the derived class methods int FindCell and vtkCell *GetCell. Derived classes may provide a more efficient implementation. See for example vtkStructuredPoints. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, and vtkRectilinearGrid.

unsigned long int vtkDataSet::GetMTime ( ) [virtual]

Datasets are composite objects and need to check each part for MTime THIS METHOD IS THREAD SAFE
Reimplemented from vtkDataObject.
Reimplemented in vtkPointSet.

vtkCellData* vtkDataSet::GetCellData ( ) [inline]

return pointer to this dataset's point data THIS METHOD IS THREAD SAFE
Definition at line 218 of file vtkDataSet.h.

vtkPointData* vtkDataSet::GetPointData ( ) [inline]

return pointer to this dataset's point data THIS METHOD IS THREAD SAFE
Definition at line 222 of file vtkDataSet.h.

virtual void vtkDataSet::Squeeze ( ) [virtual]

Reclaim any extra memory used to store data. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkPointSet, vtkPolyData, and vtkUnstructuredGrid.

virtual void vtkDataSet::ComputeBounds ( ) [virtual]

Compute the data bounding box from data points. THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, and vtkRectilinearGrid.

float* vtkDataSet::GetBounds ( )

Return a pointer to the geometry bounding box in the form (xmin,xmax, ymin,ymax, zmin,zmax). THIS METHOD IS NOT THREAD SAFE.

void vtkDataSet::GetBounds ( float bounds[6] )

Return a pointer to the geometry bounding box in the form (xmin,xmax, ymin,ymax, zmin,zmax). THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED

float* vtkDataSet::GetCenter ( )

Get the center of the bounding box. THIS METHOD IS NOT THREAD SAFE.

void vtkDataSet::GetCenter ( float center[3] )

Get the center of the bounding box. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED

float vtkDataSet::GetLength ( )

Return the length of the diagonal of the bounding box. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED

void vtkDataSet::Initialize ( ) [virtual]

Restore data object to initial state, THIS METHOD IS NOT THREAD SAFE.
Reimplemented from vtkDataObject.
Reimplemented in vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

virtual void vtkDataSet::GetScalarRange ( float range[2] ) [virtual]

Convenience method to get the range of the scalar data (if there is any scalar data). Returns the (min/max) range of combined point and cell data. If there are no point or cell scalars the method will return (0,1). Note: Update needs to be called to create the scalars. THIS METHOD IS THREAD SAFE IF FIRST CALLED FROM A SINGLE THREAD AND THE DATASET IS NOT MODIFIED
Reimplemented in vtkStructuredGrid.

float* vtkDataSet::GetScalarRange ( )

Convenience method to get the range of the scalar data (if there is any scalar data). THIS METHOD IS NOT THREAD SAFE.
Reimplemented in vtkStructuredGrid.
Referenced by vtkStructuredGrid::GetScalarRange().

virtual int vtkDataSet::GetMaxCellSize ( ) [pure virtual]

Convenience method returns largest cell size in dataset. This is generally used to allocate memory for supporting data structures. THIS METHOD IS THREAD SAFE
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

unsigned long vtkDataSet::GetActualMemorySize ( ) [virtual]

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.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

int vtkDataSet::GetDataObjectType ( ) [inline, virtual]

Return the type of data object.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, vtkStructuredPoints, and vtkUnstructuredGrid.
Definition at line 282 of file vtkDataSet.h.

void vtkDataSet::ShallowCopy ( vtkDataObject * src ) [virtual]

Shallow and Deep copy.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

void vtkDataSet::DeepCopy ( vtkDataObject * src ) [virtual]

Shallow and Deep copy.
Reimplemented from vtkDataObject.
Reimplemented in vtkImageData, vtkPointSet, vtkPolyData, vtkRectilinearGrid, vtkStructuredGrid, and vtkUnstructuredGrid.

Member Data Documentation

vtkCellData* vtkDataSet::CellData [protected]

Definition at line 306 of file vtkDataSet.h.

vtkPointData* vtkDataSet::PointData [protected]

Definition at line 307 of file vtkDataSet.h.

vtkTimeStamp vtkDataSet::ComputeTime [protected]

Definition at line 308 of file vtkDataSet.h.

float vtkDataSet::Bounds[6] [protected]

Definition at line 309 of file vtkDataSet.h.

float vtkDataSet::ScalarRange[2] [protected]

Definition at line 310 of file vtkDataSet.h.

float vtkDataSet::Center[3] [protected]

Definition at line 311 of file vtkDataSet.h.

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

Common/vtkDataSet.h

Generated on Thu Mar 28 14:28:35 2002 for VTK by

vtkDataSet Class Reference

Public Types

Public Methods

Static Public Methods

Protected Methods

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation