vtkScalarTree Class Reference

#include <vtkScalarTree.h>

Inheritance diagram for vtkScalarTree:

[legend]

Collaboration diagram for vtkScalarTree:

[legend]

List of all members.

Detailed Description

organize data according to scalar values (used to accelerate contouring operations)

vtkScalarTree is an abstract class that defines the API to concrete scalar tree subclasses. A scalar tree is a data structure that organizes data according to its scalar value. This allows rapid access to data for those algorithms that access the data based on scalar value. For example, isocontouring operates on cells based on the scalar (isocontour) value.

To use subclasses of this class, you must specify a dataset to operate on, and then specify a scalar value in the InitTraversal() method. Then calls to GetNextCell() return cells whose scalar data contains the scalar value specified.

See also:: vtkSimpleScalarTree

Definition at line 45 of file vtkScalarTree.h.


Public Types
typedef vtkObject	Superclass
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
virtual void	BuildTree ()=0
virtual void	Initialize ()=0
virtual void	InitTraversal (double scalarValue)=0

virtual void	SetDataSet (vtkDataSet *)
virtual vtkDataSet *	GetDataSet ()

virtual vtkCell *	GetNextCell (vtkIdType &cellId, vtkIdList &ptIds, vtkDataArray cellScalars)=0
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtkScalarTree *	SafeDownCast (vtkObject *o)
Protected Member Functions
	vtkScalarTree ()
	~vtkScalarTree ()
virtual void	ReportReferences (vtkGarbageCollector *)
Protected Attributes
vtkDataSet *	DataSet
vtkDataArray *	Scalars
vtkTimeStamp	BuildTime
double	ScalarValue

Member Typedef Documentation

typedef vtkObject vtkScalarTree::Superclass

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree.

Definition at line 48 of file vtkScalarTree.h.

Constructor & Destructor Documentation

vtkScalarTree::vtkScalarTree ( ) [protected]

vtkScalarTree::~vtkScalarTree ( ) [protected]

Member Function Documentation

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

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree.

static int vtkScalarTree::IsTypeOf ( const char * name ) [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree.

virtual int vtkScalarTree::IsA ( const char * name ) [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 vtkTypeRevisionMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree.

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

Reimplemented from vtkObject.

Reimplemented in vtkSimpleScalarTree.

void vtkScalarTree::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 vtkObject.

Reimplemented in vtkSimpleScalarTree.

virtual void vtkScalarTree::SetDataSet ( vtkDataSet * ) [virtual]

Build the tree from the points/cells defining this dataset.

virtual vtkDataSet* vtkScalarTree::GetDataSet ( ) [virtual]

Build the tree from the points/cells defining this dataset.

virtual void vtkScalarTree::BuildTree ( ) [pure virtual]

Construct the scalar tree from the dataset provided. Checks build times and modified time from input and reconstructs the tree if necessary.

Implemented in vtkSimpleScalarTree.

virtual void vtkScalarTree::Initialize ( ) [pure virtual]

Initialize locator. Frees memory and resets object as appropriate.

Implemented in vtkSimpleScalarTree.

virtual void vtkScalarTree::InitTraversal ( double scalarValue ) [pure virtual]

Begin to traverse the cells based on a scalar value. Returned cells will have scalar values that span the scalar value specified.

Implemented in vtkSimpleScalarTree.

virtual vtkCell* vtkScalarTree::GetNextCell	(	vtkIdType &	cellId,
		vtkIdList *&	ptIds,
		vtkDataArray *	cellScalars
	)			`[pure virtual]`

Return the next cell that may contain scalar value specified to initialize traversal. The value NULL is returned if the list is exhausted. Make sure that InitTraversal() has been invoked first or you'll get erratic behavior.

Implemented in vtkSimpleScalarTree.

virtual void vtkScalarTree::ReportReferences ( vtkGarbageCollector * ) [protected, virtual]

Reimplemented from vtkObjectBase.