vtkProgrammableGlyphFilter Class Reference

#include <vtkProgrammableGlyphFilter.h>

Inheritance diagram for vtkProgrammableGlyphFilter:

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Collaboration diagram for vtkProgrammableGlyphFilter:

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List of all members.

Detailed Description

control the generation and placement of glyphs at input points

vtkProgrammableGlyphFilter is a filter that allows you to place a glyph at each input point in the dataset. In addition, the filter is programmable which means the user has control over the generation of the glyph. The glyphs can be controlled via the point data attributes (e.g., scalars, vectors, etc.) or any other information in the input dataset.

This is the way the filter works. You must define an input dataset which at a minimum contains points with associated attribute values. Also, the Source instance variable must be set which is of type vtkPolyData. Then, for each point in the input, the PointId is set to the current point id, and a user-defined function is called (i.e., GlyphMethod). In this method you can manipulate the Source data (including changing to a different Source object). After the GlyphMethod is called, vtkProgrammableGlyphFilter will invoke an Update() on its Source object, and then copy its data to the output of the vtkProgrammableGlyphFilter. Therefore the output of this filter is of type vtkPolyData.

Another option to this filter is the way you color the glyphs. You can use the scalar data from the input or the source. The instance variable ColorMode controls this behavior.

Warning:: This filter operates on point data attributes. If you want to use cell data attributes, use a filter like vtkCellCenters to generate points at the centers of cells, and then use these points.
Note that the data attributes (cell and point) are passed to the output of this filter from the Source object. This works well as long as you are not changing the class of the Source object during execution. However, if the class of the Source object changes, then the potential exists that the data attributes might change during execution (e.g., scalars available from one source and not the next), possibly fouling up the copying of data attributes to the output. In this case, you may have to manually set the output's copy flags (e.g., CopyScalarsOn/Off(), CopyVectorsOn/Off(), etc.) to control what's being copied.

See also:: vtkGlyph3D vtkTensorGlyph vtkCellCenters

Tests:: vtkProgrammableGlyphFilter (Tests)

Definition at line 73 of file vtkProgrammableGlyphFilter.h.


Public Types
typedef vtkPolyDataAlgorithm	Superclass
typedef void(*	ProgrammableMethodCallbackType )(void *arg)
Public Member Functions
virtual const char *	GetClassName ()
virtual int	IsA (const char *type)
void	PrintSelf (ostream &os, vtkIndent indent)
void	SetGlyphMethod (void(f)(void ), void *arg)
void	SetGlyphMethodArgDelete (void(f)(void ))

void	SetSource (vtkPolyData *source)
vtkPolyData *	GetSource ()

virtual vtkIdType	GetPointId ()

virtual double *	GetPoint ()
virtual void	GetPoint (double &, double &, double &)
virtual void	GetPoint (double[3])

virtual vtkPointData *	GetPointData ()

virtual void	SetColorMode (int)
virtual int	GetColorMode ()
void	SetColorModeToColorByInput ()
void	SetColorModeToColorBySource ()
const char *	GetColorModeAsString ()
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtkProgrammableGlyphFilter *	SafeDownCast (vtkObject *o)
static vtkProgrammableGlyphFilter *	New ()
Protected Member Functions
	vtkProgrammableGlyphFilter ()
	~vtkProgrammableGlyphFilter ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
virtual int	FillInputPortInformation (int, vtkInformation *)
Protected Attributes
double	Point [3]
vtkIdType	PointId
vtkPointData *	PointData
int	ColorMode
ProgrammableMethodCallbackType	GlyphMethod
ProgrammableMethodCallbackType	GlyphMethodArgDelete
void *	GlyphMethodArg

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkProgrammableGlyphFilter::Superclass

Reimplemented from vtkPolyDataAlgorithm.

Definition at line 76 of file vtkProgrammableGlyphFilter.h.

typedef void(* vtkProgrammableGlyphFilter::ProgrammableMethodCallbackType)(void *arg)

Signature definition for programmable method callbacks. Methods passed to SetGlyphMethod or SetGlyphMethodArgDelete must conform to this signature. The presence of this typedef is useful for reference and for external analysis tools, but it cannot be used in the method signatures in these header files themselves because it prevents the internal VTK wrapper generators from wrapping these methods.

Constructor & Destructor Documentation

vtkProgrammableGlyphFilter::vtkProgrammableGlyphFilter ( ) [protected]

vtkProgrammableGlyphFilter::~vtkProgrammableGlyphFilter ( ) [protected]

Member Function Documentation

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

Reimplemented from vtkPolyDataAlgorithm.

static int vtkProgrammableGlyphFilter::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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkPolyDataAlgorithm.

virtual int vtkProgrammableGlyphFilter::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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkPolyDataAlgorithm.

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

Reimplemented from vtkPolyDataAlgorithm.

void vtkProgrammableGlyphFilter::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 vtkPolyDataAlgorithm.

static vtkProgrammableGlyphFilter* vtkProgrammableGlyphFilter::New ( ) [static]

Construct object with NULL GlyphMethod() and no source object. The ColorMode is set to color by the input.

Reimplemented from vtkPolyDataAlgorithm.

void vtkProgrammableGlyphFilter::SetSource ( vtkPolyData * source )

Set/Get the source to use for this glyph. Note: you can change the source during execution of this filter.

vtkPolyData* vtkProgrammableGlyphFilter::GetSource ( )

Set/Get the source to use for this glyph. Note: you can change the source during execution of this filter.

void vtkProgrammableGlyphFilter::SetGlyphMethod	(	void()(void )	f,
		void *	arg
	)

Specify function to be called for each input point.

void vtkProgrammableGlyphFilter::SetGlyphMethodArgDelete ( void(*)(void *) f )

Set the arg delete method. This is used to free user memory that might be associated with the GlyphMethod().

virtual vtkIdType vtkProgrammableGlyphFilter::GetPointId ( ) [virtual]

Get the current point id during processing. Value only valid during the Execute() method of this filter. (Meant to be called by the GlyphMethod().)

virtual double* vtkProgrammableGlyphFilter::GetPoint ( ) [virtual]

Get the current point coordinates during processing. Value only valid during the Execute() method of this filter. (Meant to be called by the GlyphMethod().)

virtual void vtkProgrammableGlyphFilter::GetPoint	(	double &	,
		double &	,
		double &
	)			`[virtual]`

Get the current point coordinates during processing. Value only valid during the Execute() method of this filter. (Meant to be called by the GlyphMethod().)

virtual void vtkProgrammableGlyphFilter::GetPoint ( double [3] ) [virtual]

Get the current point coordinates during processing. Value only valid during the Execute() method of this filter. (Meant to be called by the GlyphMethod().)

virtual vtkPointData* vtkProgrammableGlyphFilter::GetPointData ( ) [virtual]

Get the set of point data attributes for the input. A convenience to the programmer to be used in the GlyphMethod(). Only valid during the Execute() method of this filter.

virtual void vtkProgrammableGlyphFilter::SetColorMode ( int ) [virtual]