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/*=========================================================================
Program: Visualization Toolkit
Module: vtkSphereSource.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 vtkSphereSource - create a polygonal sphere centered at the origin
// .SECTION Description
// vtkSphereSource creates a sphere (represented by polygons) of specified
// radius centered at the origin. The resolution (polygonal discretization)
// in both the latitude (phi) and longitude (theta) directions can be
// specified. It also is possible to create partial spheres by specifying
// maximum phi and theta angles. By default, the surface tessellation of
// the sphere uses triangles; however you can set LatLongTessellation to
// produce a tessellation using quadrilaterals.
// .SECTION Caveats
// Resolution means the number of latitude or longitude lines for a complete
// sphere. If you create partial spheres the number of latitude/longitude
// lines may be off by one.
#ifndef __vtkSphereSource_h
#define __vtkSphereSource_h
#include "vtkPolyDataAlgorithm.h"
#define VTK_MAX_SPHERE_RESOLUTION 1024
class VTK_GRAPHICS_EXPORT vtkSphereSource : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkSphereSource,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct sphere with radius=0.5 and default resolution 8 in both Phi
// and Theta directions. Theta ranges from (0,360) and phi (0,180) degrees.
static vtkSphereSource *New();
// Description:
// Set radius of sphere. Default is .5.
vtkSetClampMacro(Radius,double,0.0,VTK_DOUBLE_MAX);
vtkGetMacro(Radius,double);
// Description:
// Set the center of the sphere. Default is 0,0,0.
vtkSetVector3Macro(Center,double);
vtkGetVectorMacro(Center,double,3);
// Description:
// Set the number of points in the longitude direction (ranging from
// StartTheta to EndTheta).
vtkSetClampMacro(ThetaResolution,int,3,VTK_MAX_SPHERE_RESOLUTION);
vtkGetMacro(ThetaResolution,int);
// Description:
// Set the number of points in the latitude direction (ranging
// from StartPhi to EndPhi).
vtkSetClampMacro(PhiResolution,int,3,VTK_MAX_SPHERE_RESOLUTION);
vtkGetMacro(PhiResolution,int);
// Description:
// Set the starting longitude angle. By default StartTheta=0 degrees.
vtkSetClampMacro(StartTheta,double,0.0,360.0);
vtkGetMacro(StartTheta,double);
// Description:
// Set the ending longitude angle. By default EndTheta=360 degrees.
vtkSetClampMacro(EndTheta,double,0.0,360.0);
vtkGetMacro(EndTheta,double);
// Description:
// Set the starting latitude angle (0 is at north pole). By default
// StartPhi=0 degrees.
vtkSetClampMacro(StartPhi,double,0.0,360.0);
vtkGetMacro(StartPhi,double);
// Description:
// Set the ending latitude angle. By default EndPhi=180 degrees.
vtkSetClampMacro(EndPhi,double,0.0,360.0);
vtkGetMacro(EndPhi,double);
// Description:
// Cause the sphere to be tessellated with edges along the latitude
// and longitude lines. If off, triangles are generated at non-polar
// regions, which results in edges that are not parallel to latitude and
// longitude lines. If on, quadrilaterals are generated everywhere
// except at the poles. This can be useful for generating a wireframe
// sphere with natural latitude and longitude lines.
vtkSetMacro(LatLongTessellation,int);
vtkGetMacro(LatLongTessellation,int);
vtkBooleanMacro(LatLongTessellation,int);
protected:
vtkSphereSource(int res=8);
~vtkSphereSource() {}
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
int RequestInformation(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
double Radius;
double Center[3];
int ThetaResolution;
int PhiResolution;
double StartTheta;
double EndTheta;
double StartPhi;
double EndPhi;
int LatLongTessellation;
private:
vtkSphereSource(const vtkSphereSource&); // Not implemented.
void operator=(const vtkSphereSource&); // Not implemented.
};
#endif
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