paraview-dev 5.0.1+dfsg1-4 / usr / include / paraview / vtkExtractHistogram.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkExtractHistogram.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.

=========================================================================*/

#ifndef vtkExtractHistogram_h
#define vtkExtractHistogram_h

#include "vtkPVVTKExtensionsDefaultModule.h" //needed for exports
#include "vtkTableAlgorithm.h"

//BTX
class vtkDoubleArray;
class vtkFieldData;
class vtkIntArray;
struct vtkEHInternals;
//ETX

// .NAME vtkExtractHistogram - Extract histogram data (binned values) from any 
// dataset
// .SECTION Description
// vtkExtractHistogram accepts any vtkDataSet as input and produces a
// vtkPolyData containing histogram data as output.  The output vtkPolyData
// will have contain a vtkDoubleArray named "bin_extents" which contains
// the boundaries between each histogram bin, and a vtkUnsignedLongArray
// named "bin_values" which will contain the value for each bin.

class VTKPVVTKEXTENSIONSDEFAULT_EXPORT vtkExtractHistogram : public vtkTableAlgorithm
{
public:
  static vtkExtractHistogram* New();
  vtkTypeMacro(vtkExtractHistogram, vtkTableAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // Controls which input data component should be binned, for input arrays
  // with more-than-one component
  vtkSetClampMacro(Component, int, 0, VTK_INT_MAX);
  vtkGetMacro(Component, int);
  
  // Description:
  // Controls the number of bins N in the output histogram data
  vtkSetClampMacro(BinCount, int, 1, VTK_INT_MAX);
  vtkGetMacro(BinCount, int);

  // Description:
  // Get/Set custom bin ranges to use. These are used only when
  // UseCustomBinRanges is set to true.
  vtkSetVector2Macro(CustomBinRanges, double);
  vtkGetVector2Macro(CustomBinRanges, double);

  // Description:
  // When set to true, CustomBinRanges will  be used instead of using the full
  // range for the selected array. By default, set to false.
  vtkSetMacro(UseCustomBinRanges, bool);
  vtkGetMacro(UseCustomBinRanges, bool);
  vtkBooleanMacro(UseCustomBinRanges, bool);
  
  // Description:
  // This option controls whether the algorithm calculates averages
  // of variables other than the primary variable that fall into each
  // bin. False by default.
  vtkSetMacro(CalculateAverages, int);
  vtkGetMacro(CalculateAverages, int);
  vtkBooleanMacro(CalculateAverages, int);
  
protected: 
  vtkExtractHistogram();
  ~vtkExtractHistogram();

  // Description:
  // Returns the data range for the input array to process.
  // This method is not called with this->UseCustomBinRanges is true.
  // Returns true is range could be determined correctly, otherwise returns
  // false and range is set to {VTK_DOUBLE_MAX, VTK_DOUBLE_MIN}. When returning
  // true, the actual data range is returned (without any extra padding).
  virtual bool GetInputArrayRange(vtkInformationVector** inputVector, double range[2]);

  virtual int FillInputPortInformation (int port, vtkInformation *info);

  virtual int RequestData(vtkInformation *request, 
                          vtkInformationVector **inputVector, 
                          vtkInformationVector *outputVector);

  // Initialize the bin_extents using the data range for the selected 
  // array.
  virtual bool InitializeBinExtents(
    vtkInformationVector** inputVector, 
    vtkDoubleArray* bin_extents, 
    double& min, double& max);

  void BinAnArray(
    vtkDataArray *src, 
    vtkIntArray *vals, 
    double min, double max,
    vtkFieldData* field);

  void FillBinExtents(vtkDoubleArray* bin_extents, double min, double max);

  double CustomBinRanges[2];
  bool UseCustomBinRanges;
  int Component;
  int BinCount;
  int CalculateAverages;

  vtkEHInternals* Internal;
  
private:
  void operator=(const vtkExtractHistogram&); // Not implemented
  vtkExtractHistogram(const vtkExtractHistogram&); // Not implemented
  
  int GetInputFieldAssociation();
  vtkFieldData* GetInputFieldData(vtkDataObject* input);
};

#endif

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