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/*=========================================================================
Program: Visualization Toolkit
Module: vtkRecursiveDividingCubes.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 vtkRecursiveDividingCubes - create points lying on isosurface (using recursive approach)
// .SECTION Description
// vtkRecursiveDividingCubes is a filter that generates points lying on a
// surface of constant scalar value (i.e., an isosurface). Dense point
// clouds (i.e., at screen resolution) will appear as a surface. Less dense
// clouds can be used as a source to generate streamlines or to generate
// "transparent" surfaces.
//
// This implementation differs from vtkDividingCubes in that it uses a
// recursive procedure. In many cases this can result in generating
// more points than the procedural implementation of vtkDividingCubes. This is
// because the recursive procedure divides voxels by multiples of powers of
// two. This can over-constrain subdivision. One of the advantages of the
// recursive technique is that the recursion is terminated earlier, which in
// some cases can be more efficient.
// .SECTION See Also
// vtkDividingCubes vtkContourFilter vtkMarchingCubes
#ifndef __vtkRecursiveDividingCubes_h
#define __vtkRecursiveDividingCubes_h
#include "vtkPolyDataAlgorithm.h"
class vtkVoxel;
class VTK_GRAPHICS_EXPORT vtkRecursiveDividingCubes : public vtkPolyDataAlgorithm
{
public:
static vtkRecursiveDividingCubes *New();
vtkTypeMacro(vtkRecursiveDividingCubes,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Set isosurface value.
vtkSetMacro(Value,double);
vtkGetMacro(Value,double);
// Description:
// Specify sub-voxel size at which to generate point.
vtkSetClampMacro(Distance,double,1.0e-06,VTK_DOUBLE_MAX);
vtkGetMacro(Distance,double);
// Description:
// Every "Increment" point is added to the list of points. This parameter, if
// set to a large value, can be used to limit the number of points while
// retaining good accuracy.
vtkSetClampMacro(Increment,int,1,VTK_LARGE_INTEGER);
vtkGetMacro(Increment,int);
protected:
vtkRecursiveDividingCubes();
~vtkRecursiveDividingCubes();
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
virtual int FillInputPortInformation(int port, vtkInformation *info);
void SubDivide(double origin[3], double h[3], double values[8]);
double Value;
double Distance;
int Increment;
// working variable
int Count;
// to replace a static
vtkVoxel *Voxel;
private:
vtkRecursiveDividingCubes(const vtkRecursiveDividingCubes&); // Not implemented.
void operator=(const vtkRecursiveDividingCubes&); // Not implemented.
};
#endif
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