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/*=========================================================================
Program: Visualization Toolkit
Module: vtkRotationalExtrusionFilter.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.
=========================================================================*/
// .NAME vtkRotationalExtrusionFilter - sweep polygonal data creating "skirt" from free edges and lines, and lines from vertices
// .SECTION Description
// vtkRotationalExtrusionFilter is a modeling filter. It takes polygonal
// data as input and generates polygonal data on output. The input dataset
// is swept around the z-axis to create new polygonal primitives. These
// primitives form a "skirt" or swept surface. For example, sweeping a
// line results in a cylindrical shell, and sweeping a circle creates a
// torus.
//
// 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" instance
// variable. Also, you can control the angle of rotation, and whether
// translation along the z-axis is performed along with the rotation.
// (Translation is useful for creating "springs".) You also can adjust
// the radius of the generating geometry using the "DeltaRotation" 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 model axisymmetric objects like cylinders,
// bottles, and wine glasses; or translational/rotational symmetric objects
// like springs or corkscrews.
// .SECTION Caveats
// If the object sweeps 360 degrees, radius does not vary, and the object
// does not translate, capping is not performed. This is because the cap
// is unnecessary.
//
// 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.
// .SECTION See Also
// vtkLinearExtrusionFilter
#ifndef __vtkRotationalExtrusionFilter_h
#define __vtkRotationalExtrusionFilter_h
#include "vtkPolyDataAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkRotationalExtrusionFilter : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkRotationalExtrusionFilter,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Create object with capping on, angle of 360 degrees, resolution = 12, and
// no translation along z-axis.
// vector (0,0,1), and point (0,0,0).
static vtkRotationalExtrusionFilter *New();
// Description:
// Set/Get resolution of sweep operation. Resolution controls the number
// of intermediate node points.
vtkSetClampMacro(Resolution,int,1,VTK_LARGE_INTEGER);
vtkGetMacro(Resolution,int);
// Description:
// Turn on/off the capping of the skirt.
vtkSetMacro(Capping,int);
vtkGetMacro(Capping,int);
vtkBooleanMacro(Capping,int);
// Description:
// Set/Get angle of rotation.
vtkSetMacro(Angle,double);
vtkGetMacro(Angle,double);
// Description:
// Set/Get total amount of translation along the z-axis.
vtkSetMacro(Translation,double);
vtkGetMacro(Translation,double);
// Description:
// Set/Get change in radius during sweep process.
vtkSetMacro(DeltaRadius,double);
vtkGetMacro(DeltaRadius,double);
protected:
vtkRotationalExtrusionFilter();
~vtkRotationalExtrusionFilter() {};
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
int Resolution;
int Capping;
double Angle;
double Translation;
double DeltaRadius;
private:
vtkRotationalExtrusionFilter(const vtkRotationalExtrusionFilter&); // Not implemented.
void operator=(const vtkRotationalExtrusionFilter&); // Not implemented.
};
#endif
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