vtkLinearExtrusionFilter Class Reference

#include <vtkLinearExtrusionFilter.h>

Inheritance diagram for vtkLinearExtrusionFilter:

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Collaboration diagram for vtkLinearExtrusionFilter:

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List of all members.

Detailed Description

sweep polygonal data creating a "skirt" from free edges and lines, and lines from vertices

vtkLinearExtrusionFilter is a modeling filter. It takes polygonal data as input and generates polygonal data on output. The input dataset is swept according to some extrusion function and creates new polygonal primitives. These primitives form a "skirt" or swept surface. For example, sweeping a line results in a quadrilateral, and sweeping a triangle creates a "wedge".

There are a number of control parameters for this filter. You can control whether the sweep of a 2D object (i.e., polygon or triangle strip) is capped with the generating geometry via the "Capping" ivar. Also, you can extrude in the direction of a user specified vector, towards a point, or in the direction of vertex normals (normals must be provided - use vtkPolyDataNormals if necessary). The amount of extrusion is controlled by the "ScaleFactor" instance variable.

The skirt is generated by locating certain topological features. Free edges (edges of polygons or triangle strips only used by one polygon or triangle strips) generate surfaces. This is true also of lines or polylines. Vertices generate lines.

This filter can be used to create 3D fonts, 3D irregular bar charts, or to model 2 1/2D objects like punched plates. It also can be used to create solid objects from 2D polygonal meshes.

Warning:: Some polygonal objects have no free edges (e.g., sphere). When swept, this will result in two separate surfaces if capping is on, or no surface if capping is off.

See also:: vtkRotationalExtrusionFilter

Tests:: vtkLinearExtrusionFilter (Tests)

Definition at line 64 of file vtkLinearExtrusionFilter.h.


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

virtual void	SetExtrusionType (int)
virtual int	GetExtrusionType ()
void	SetExtrusionTypeToVectorExtrusion ()
void	SetExtrusionTypeToNormalExtrusion ()
void	SetExtrusionTypeToPointExtrusion ()

virtual void	SetCapping (int)
virtual int	GetCapping ()
virtual void	CappingOn ()
virtual void	CappingOff ()

virtual void	SetScaleFactor (double)
virtual double	GetScaleFactor ()

virtual void	SetVector (double, double, double)
virtual void	SetVector (double[3])
virtual double *	GetVector ()
virtual void	GetVector (double data[3])

virtual void	SetExtrusionPoint (double, double, double)
virtual void	SetExtrusionPoint (double[3])
virtual double *	GetExtrusionPoint ()
virtual void	GetExtrusionPoint (double data[3])
Static Public Member Functions
static int	IsTypeOf (const char *type)
static vtkLinearExtrusionFilter *	SafeDownCast (vtkObject *o)
static vtkLinearExtrusionFilter *	New ()
Protected Member Functions
	vtkLinearExtrusionFilter ()
	~vtkLinearExtrusionFilter ()
virtual int	RequestData (vtkInformation , vtkInformationVector , vtkInformationVector )
double *	ViaNormal (double x[3], vtkIdType id, vtkDataArray *normals)
double *	ViaVector (double x[3], vtkIdType id, vtkDataArray *normals=0)
double *	ViaPoint (double x[3], vtkIdType id, vtkDataArray *normals=0)
Protected Attributes
int	ExtrusionType
int	Capping
double	ScaleFactor
double	Vector [3]
double	ExtrusionPoint [3]
double (vtkLinearExtrusionFilter::	ExtrudePoint )(double x[3], vtkIdType id, vtkDataArray *normals)

Member Typedef Documentation

typedef vtkPolyDataAlgorithm vtkLinearExtrusionFilter::Superclass

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

Definition at line 67 of file vtkLinearExtrusionFilter.h.

Constructor & Destructor Documentation

vtkLinearExtrusionFilter::vtkLinearExtrusionFilter ( ) [protected]

vtkLinearExtrusionFilter::~vtkLinearExtrusionFilter ( ) [inline, protected]

Definition at line 115 of file vtkLinearExtrusionFilter.h.

Member Function Documentation

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

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

static int vtkLinearExtrusionFilter::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 vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

virtual int vtkLinearExtrusionFilter::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 vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

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

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

void vtkLinearExtrusionFilter::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.

Reimplemented in vtkPLinearExtrusionFilter.

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

Create object with normal extrusion type, capping on, scale factor=1.0, vector (0,0,1), and extrusion point (0,0,0).

Reimplemented from vtkPolyDataAlgorithm.

Reimplemented in vtkPLinearExtrusionFilter.

virtual void vtkLinearExtrusionFilter::SetExtrusionType ( int ) [virtual]