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/*=========================================================================
Program: Visualization Toolkit
Module: vtkThresholdPoints.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 vtkThresholdPoints - extracts points whose scalar value satisfies threshold criterion
// .SECTION Description
// vtkThresholdPoints is a filter that extracts points from a dataset that
// satisfy a threshold criterion. The criterion can take three forms:
// 1) greater than a particular value; 2) less than a particular value; or
// 3) between a particular value. The output of the filter is polygonal data.
// .SECTION See Also
// vtkThreshold
#ifndef __vtkThresholdPoints_h
#define __vtkThresholdPoints_h
#include "vtkPolyDataAlgorithm.h"
class VTK_GRAPHICS_EXPORT vtkThresholdPoints : public vtkPolyDataAlgorithm
{
public:
static vtkThresholdPoints *New();
vtkTypeMacro(vtkThresholdPoints,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Criterion is cells whose scalars are less or equal to lower threshold.
void ThresholdByLower(double lower);
// Description:
// Criterion is cells whose scalars are greater or equal to upper threshold.
void ThresholdByUpper(double upper);
// Description:
// Criterion is cells whose scalars are between lower and upper thresholds
// (inclusive of the end values).
void ThresholdBetween(double lower, double upper);
// Description:
// Set/Get the upper threshold.
vtkSetMacro(UpperThreshold,double);
vtkGetMacro(UpperThreshold,double);
// Description:
// Set/Get the lower threshold.
vtkSetMacro(LowerThreshold,double);
vtkGetMacro(LowerThreshold,double);
protected:
vtkThresholdPoints();
~vtkThresholdPoints() {};
// Usual data generation method
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
virtual int FillInputPortInformation(int port, vtkInformation *info);
double LowerThreshold;
double UpperThreshold;
//BTX
int (vtkThresholdPoints::*ThresholdFunction)(double s);
//ETX
int Lower(double s) {return ( s <= this->LowerThreshold ? 1 : 0 );};
int Upper(double s) {return ( s >= this->UpperThreshold ? 1 : 0 );};
int Between(double s) {return ( s >= this->LowerThreshold ?
( s <= this->UpperThreshold ? 1 : 0 ) : 0 );};
private:
vtkThresholdPoints(const vtkThresholdPoints&); // Not implemented.
void operator=(const vtkThresholdPoints&); // Not implemented.
};
#endif
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