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# 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

Date:
  2002/09/03 12:52:23

Revision:
  1.41

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

Created by:
  - Schroeder, Will

CVS contributions (if > 5%):
  - Schroeder, Will (60%)
  - Martin, Ken (11%)
  - Law, Charles (11%)

CVS logs (CVSweb):
  - .`h` (`/Graphics/vtkLinearExtrusionFilter.h)`
  - .`cxx` (`/Graphics/vtkLinearExtrusionFilter.cxx)`

Tests:
  vtkLinearExtrusionFilter (Tests)

Definition at line 80 of file vtkLinearExtrusionFilter.h.

## Public Types

typedef vtkPolyDataToPolyDataFilter | Superclass

## Public Methods

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 (float)
virtual float | GetScaleFactor ()
virtual void | SetVector (float, float, float)
virtual void | SetVector (float[3])
virtual float * | GetVector ()
virtual void | GetVector (float data[3])
virtual void | SetExtrusionPoint (float, float, float)
virtual void | SetExtrusionPoint (float[3])
virtual float * | GetExtrusionPoint ()
virtual void | GetExtrusionPoint (float data[3])

## Static Public Methods

int | IsTypeOf (const char *type)
vtkLinearExtrusionFilter * | SafeDownCast (vtkObject *o)
vtkLinearExtrusionFilter * | New ()

## Protected Methods

| vtkLinearExtrusionFilter ()
| ~vtkLinearExtrusionFilter ()
void | Execute ()
float * | ViaNormal (float x[3], vtkIdType id, vtkDataArray *normals)
float * | ViaVector (float x[3], vtkIdType id, vtkDataArray *normals=0)
float * | ViaPoint (float x[3], vtkIdType id, vtkDataArray *normals=0)

## Protected Attributes

int | ExtrusionType
int | Capping
float | ScaleFactor
float | Vector [3]
float | ExtrusionPoint [3]
float *(vtkLinearExtrusionFilter::* | ExtrudePoint )(float x[3], vtkIdType id, vtkDataArray *normals)

## Member Typedef Documentation

typedef vtkPolyDataToPolyDataFilter vtkLinearExtrusionFilter::Superclass

| Reimplemented from vtkPolyDataToPolyDataFilter. Reimplemented in vtkPLinearExtrusionFilter. Definition at line 83 of file vtkLinearExtrusionFilter.h.

## Constructor & Destructor Documentation

vtkLinearExtrusionFilter::vtkLinearExtrusionFilter | ( |  | ) | `[protected]`

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

| Definition at line 131 of file vtkLinearExtrusionFilter.h.

## Member Function Documentation

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

| Reimplemented from vtkPolyDataToPolyDataFilter. Reimplemented in vtkPLinearExtrusionFilter.

int vtkLinearExtrusionFilter::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 vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter. Reimplemented in vtkPLinearExtrusionFilter.

virtual int vtkLinearExtrusionFilter::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 vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkPolyDataToPolyDataFilter. Reimplemented in vtkPLinearExtrusionFilter.

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

| Reimplemented from vtkPolyDataToPolyDataFilter. 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 vtkPolyDataToPolyDataFilter. Reimplemented in vtkPLinearExtrusionFilter.

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 vtkObject. Reimplemented in vtkPLinearExtrusionFilter.

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

| Set/Get the type of extrusion.

virtual int vtkLinearExtrusionFilter::GetExtrusionType | ( |  | ) | `[virtual]`

| Set/Get the type of extrusion.

void vtkLinearExtrusionFilter::SetExtrusionTypeToVectorExtrusion | ( |  | ) | `[inline]`

| Set/Get the type of extrusion. Definition at line 94 of file vtkLinearExtrusionFilter.h. References VTK_VECTOR_EXTRUSION.

void vtkLinearExtrusionFilter::SetExtrusionTypeToNormalExtrusion | ( |  | ) | `[inline]`

| Set/Get the type of extrusion. Definition at line 96 of file vtkLinearExtrusionFilter.h. References VTK_NORMAL_EXTRUSION.

void vtkLinearExtrusionFilter::SetExtrusionTypeToPointExtrusion | ( |  | ) | `[inline]`

| Set/Get the type of extrusion. Definition at line 98 of file vtkLinearExtrusionFilter.h. References VTK_POINT_EXTRUSION.

virtual void vtkLinearExtrusionFilter::SetCapping | ( | int |  | ) | `[virtual]`

| Turn on/off the capping of the skirt.

virtual int vtkLinearExtrusionFilter::GetCapping | ( |  | ) | `[virtual]`

| Turn on/off the capping of the skirt.

virtual void vtkLinearExtrusionFilter::CappingOn | ( |  | ) | `[virtual]`

| Turn on/off the capping of the skirt.

virtual void vtkLinearExtrusionFilter::CappingOff | ( |  | ) | `[virtual]`

| Turn on/off the capping of the skirt.

virtual void vtkLinearExtrusionFilter::SetScaleFactor | ( | float |  | ) | `[virtual]`

| Set/Get extrusion scale factor,

virtual float vtkLinearExtrusionFilter::GetScaleFactor | ( |  | ) | `[virtual]`

| Set/Get extrusion scale factor,

virtual void vtkLinearExtrusionFilter::SetVector | ( | float | ,
|  | float | ,
|  | float |
| ) | `[virtual]`

| Set/Get extrusion vector. Only needs to be set if VectorExtrusion is turned on.

virtual void vtkLinearExtrusionFilter::SetVector | ( | float | [3] | ) | `[virtual]`

| Set/Get extrusion vector. Only needs to be set if VectorExtrusion is turned on.

virtual float* vtkLinearExtrusionFilter::GetVector | ( |  | ) | `[virtual]`

| Set/Get extrusion vector. Only needs to be set if VectorExtrusion is turned on.

virtual void vtkLinearExtrusionFilter::GetVector | ( | float | data[3] | ) | `[virtual]`

| Set/Get extrusion vector. Only needs to be set if VectorExtrusion is turned on.

virtual void vtkLinearExtrusionFilter::SetExtrusionPoint | ( | float | ,
|  | float | ,
|  | float |
| ) | `[virtual]`

| Set/Get extrusion point. Only needs to be set if PointExtrusion is turned on. This is the point towards which extrusion occurs.

virtual void vtkLinearExtrusionFilter::SetExtrusionPoint | ( | float | [3] | ) | `[virtual]`

| Set/Get extrusion point. Only needs to be set if PointExtrusion is turned on. This is the point towards which extrusion occurs.

virtual float* vtkLinearExtrusionFilter::GetExtrusionPoint | ( |  | ) | `[virtual]`

| Set/Get extrusion point. Only needs to be set if PointExtrusion is turned on. This is the point towards which extrusion occurs.

virtual void vtkLinearExtrusionFilter::GetExtrusionPoint | ( | float | data[3] | ) | `[virtual]`

| Set/Get extrusion point. Only needs to be set if PointExtrusion is turned on. This is the point towards which extrusion occurs.

void vtkLinearExtrusionFilter::Execute | ( |  | ) | `[protected, virtual]`

| This method is the old style execute method Reimplemented from vtkSource. Reimplemented in vtkPLinearExtrusionFilter.

float* vtkLinearExtrusionFilter::ViaNormal | ( | float | x[3],
|  | vtkIdType | id,
|  | vtkDataArray * | normals
| ) | `[protected]`

float* vtkLinearExtrusionFilter::ViaVector | ( | float | x[3],
|  | vtkIdType | id,
|  | vtkDataArray * | normals = 0
| ) | `[protected]`

float* vtkLinearExtrusionFilter::ViaPoint | ( | float | x[3],
|  | vtkIdType | id,
|  | vtkDataArray * | normals = 0
| ) | `[protected]`

## Member Data Documentation

int vtkLinearExtrusionFilter::ExtrusionType`[protected]`

| Definition at line 134 of file vtkLinearExtrusionFilter.h.

int vtkLinearExtrusionFilter::Capping`[protected]`

| Definition at line 135 of file vtkLinearExtrusionFilter.h.

float vtkLinearExtrusionFilter::ScaleFactor`[protected]`

| Definition at line 136 of file vtkLinearExtrusionFilter.h.

float vtkLinearExtrusionFilter::Vector[3]`[protected]`

| Definition at line 137 of file vtkLinearExtrusionFilter.h.

float vtkLinearExtrusionFilter::ExtrusionPoint[3]`[protected]`

| Definition at line 138 of file vtkLinearExtrusionFilter.h.

float*(vtkLinearExtrusionFilter::* vtkLinearExtrusionFilter::ExtrudePoint)(float x[3], vtkIdType id, vtkDataArray *normals)`[protected]`

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

- Graphics/vtkLinearExtrusionFilter.h