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/*=========================================================================
Program: Visualization Toolkit
Module: vtkLinearExtrusionFilter.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkLinearExtrusionFilter
* @brief 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.
*
* @sa
* vtkRotationalExtrusionFilter
*/
#ifndef vtkLinearExtrusionFilter_h
#define vtkLinearExtrusionFilter_h
#include "vtkFiltersModelingModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
class vtkDataArray;
#define VTK_VECTOR_EXTRUSION 1
#define VTK_NORMAL_EXTRUSION 2
#define VTK_POINT_EXTRUSION 3
class VTKFILTERSMODELING_EXPORT vtkLinearExtrusionFilter : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkLinearExtrusionFilter,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
/**
* Create object with normal extrusion type, capping on, scale factor=1.0,
* vector (0,0,1), and extrusion point (0,0,0).
*/
static vtkLinearExtrusionFilter *New();
//@{
/**
* Set/Get the type of extrusion.
*/
vtkSetClampMacro(ExtrusionType,int,VTK_VECTOR_EXTRUSION,VTK_POINT_EXTRUSION);
vtkGetMacro(ExtrusionType,int);
void SetExtrusionTypeToVectorExtrusion()
{this->SetExtrusionType(VTK_VECTOR_EXTRUSION);};
void SetExtrusionTypeToNormalExtrusion()
{this->SetExtrusionType(VTK_NORMAL_EXTRUSION);};
void SetExtrusionTypeToPointExtrusion()
{this->SetExtrusionType(VTK_POINT_EXTRUSION);};
//@}
//@{
/**
* Turn on/off the capping of the skirt.
*/
vtkSetMacro(Capping,int);
vtkGetMacro(Capping,int);
vtkBooleanMacro(Capping,int);
//@}
//@{
/**
* Set/Get extrusion scale factor,
*/
vtkSetMacro(ScaleFactor,double);
vtkGetMacro(ScaleFactor,double);
//@}
//@{
/**
* Set/Get extrusion vector. Only needs to be set if VectorExtrusion is
* turned on.
*/
vtkSetVector3Macro(Vector,double);
vtkGetVectorMacro(Vector,double,3);
//@}
//@{
/**
* Set/Get extrusion point. Only needs to be set if PointExtrusion is
* turned on. This is the point towards which extrusion occurs.
*/
vtkSetVector3Macro(ExtrusionPoint,double);
vtkGetVectorMacro(ExtrusionPoint,double,3);
//@}
protected:
vtkLinearExtrusionFilter();
~vtkLinearExtrusionFilter() {}
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
int ExtrusionType;
int Capping;
double ScaleFactor;
double Vector[3];
double ExtrusionPoint[3];
void (vtkLinearExtrusionFilter::*ExtrudePoint)(double x[3], vtkIdType id,
vtkDataArray *normals);
void ViaNormal(double x[3], vtkIdType id, vtkDataArray *normals);
void ViaVector(double x[3], vtkIdType id, vtkDataArray *normals=0);
void ViaPoint(double x[3], vtkIdType id, vtkDataArray *normals=0);
private:
vtkLinearExtrusionFilter(const vtkLinearExtrusionFilter&) VTK_DELETE_FUNCTION;
void operator=(const vtkLinearExtrusionFilter&) VTK_DELETE_FUNCTION;
};
#endif
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