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79 lines
2.8 KiB
79 lines
2.8 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkThresholdPoints.h,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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// .NAME vtkThresholdPoints - extracts points whose scalar value satisfies threshold criterion
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// .SECTION Description
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// vtkThresholdPoints is a filter that extracts points from a dataset that
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// satisfy a threshold criterion. The criterion can take three forms:
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// 1) greater than a particular value; 2) less than a particular value; or
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// 3) between a particular value. The output of the filter is polygonal data.
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// .SECTION See Also
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// vtkThreshold
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#ifndef __vtkThresholdPoints_h
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#define __vtkThresholdPoints_h
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#include "vtkPolyDataAlgorithm.h"
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class VTK_GRAPHICS_EXPORT vtkThresholdPoints : public vtkPolyDataAlgorithm
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{
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public:
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static vtkThresholdPoints *New();
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vtkTypeRevisionMacro(vtkThresholdPoints,vtkPolyDataAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent);
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// Description:
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// Criterion is cells whose scalars are less or equal to lower threshold.
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void ThresholdByLower(double lower);
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// Description:
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// Criterion is cells whose scalars are greater or equal to upper threshold.
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void ThresholdByUpper(double upper);
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// Description:
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// Criterion is cells whose scalars are between lower and upper thresholds
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// (inclusive of the end values).
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void ThresholdBetween(double lower, double upper);
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// Description:
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// Get the upper and lower thresholds.
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vtkGetMacro(UpperThreshold,double);
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vtkGetMacro(LowerThreshold,double);
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protected:
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vtkThresholdPoints();
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~vtkThresholdPoints() {};
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// Usual data generation method
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virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
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virtual int FillInputPortInformation(int port, vtkInformation *info);
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double LowerThreshold;
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double UpperThreshold;
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//BTX
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int (vtkThresholdPoints::*ThresholdFunction)(double s);
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//ETX
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int Lower(double s) {return ( s <= this->LowerThreshold ? 1 : 0 );};
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int Upper(double s) {return ( s >= this->UpperThreshold ? 1 : 0 );};
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int Between(double s) {return ( s >= this->LowerThreshold ?
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( s <= this->UpperThreshold ? 1 : 0 ) : 0 );};
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private:
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vtkThresholdPoints(const vtkThresholdPoints&); // Not implemented.
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void operator=(const vtkThresholdPoints&); // Not implemented.
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};
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#endif
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