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111 lines
3.2 KiB
C++
111 lines
3.2 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkThresholdPoints.h
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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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/**
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* @class vtkThresholdPoints
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* @brief extracts points whose scalar value satisfies threshold criterion
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*
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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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*
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* @sa
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* vtkThreshold vtkSelectEnclosedPoints vtkExtractEnclosedPoints
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*/
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#ifndef vtkThresholdPoints_h
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#define vtkThresholdPoints_h
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#include "vtkFiltersCoreModule.h" // For export macro
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#include "vtkPolyDataAlgorithm.h"
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class VTKFILTERSCORE_EXPORT vtkThresholdPoints : public vtkPolyDataAlgorithm
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{
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public:
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static vtkThresholdPoints* New();
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vtkTypeMacro(vtkThresholdPoints, vtkPolyDataAlgorithm);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Criterion is cells whose scalars are less or equal to lower threshold.
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*/
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void ThresholdByLower(double lower);
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/**
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* Criterion is cells whose scalars are greater or equal to upper threshold.
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*/
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void ThresholdByUpper(double upper);
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/**
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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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*/
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void ThresholdBetween(double lower, double upper);
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//@{
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/**
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* Set/Get the upper threshold.
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*/
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vtkSetMacro(UpperThreshold, double);
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vtkGetMacro(UpperThreshold, double);
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//@}
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//@{
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/**
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* Set/Get the lower threshold.
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*/
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vtkSetMacro(LowerThreshold, double);
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vtkGetMacro(LowerThreshold, double);
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//@}
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//@{
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/**
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* Set/get the desired precision for the output types. See the documentation
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* for the vtkAlgorithm::DesiredOutputPrecision enum for an explanation of
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* the available precision settings.
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*/
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vtkSetMacro(OutputPointsPrecision, int);
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vtkGetMacro(OutputPointsPrecision, int);
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//@}
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protected:
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vtkThresholdPoints();
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~vtkThresholdPoints() override {}
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// Usual data generation method
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int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
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int FillInputPortInformation(int port, vtkInformation* info) override;
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double LowerThreshold;
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double UpperThreshold;
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int OutputPointsPrecision;
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int (vtkThresholdPoints::*ThresholdFunction)(double s);
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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)
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{
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return (s >= this->LowerThreshold ? (s <= this->UpperThreshold ? 1 : 0) : 0);
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}
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private:
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vtkThresholdPoints(const vtkThresholdPoints&) = delete;
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void operator=(const vtkThresholdPoints&) = delete;
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};
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#endif
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