vtkSelector.h

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

  Program:   Visualization Toolkit
  Module:    vtkSelector.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 vtkSelector_h
#define vtkSelector_h

#include "vtkFiltersExtractionModule.h" // For export macro
#include "vtkObject.h"
#include "vtkSmartPointer.h" // For vtkSmartPointer

class vtkCompositeDataSet;
class vtkDataObject;
class vtkSelectionNode;
class vtkSignedCharArray;
class vtkTable;

class VTKFILTERSEXTRACTION_EXPORT vtkSelector : public vtkObject
{
  public:
  vtkTypeMacro(vtkSelector, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  virtual void Initialize(vtkSelectionNode* node, const std::string& insidednessArrayName);

  virtual void Finalize() {}

  virtual bool ComputeSelectedElements(vtkDataObject* input, vtkDataObject* output);

protected:
  vtkSelector();
  virtual ~vtkSelector() override;

  // Contains the selection criteria.
  vtkSelectionNode* Node = nullptr;

  // Name of the insidedness array added to the output when the selection criteria is
  // evaluated by this operator.
  std::string InsidednessArrayName;

  virtual bool ComputeSelectedElementsForBlock(vtkDataObject* input,
    vtkSignedCharArray* insidednessArray, unsigned int compositeIndex,
    unsigned int amrLevel, unsigned int amrIndex) = 0;

  virtual bool ComputeSelectedElementsForCompositeDataSet(
    vtkCompositeDataSet* input, vtkCompositeDataSet* output);

  bool SkipBlock(unsigned int compositeIndex, unsigned int amrLevel, unsigned int amrIndex);

  vtkSmartPointer<vtkSignedCharArray> CreateInsidednessArray(vtkIdType numElems);

  vtkSmartPointer<vtkSignedCharArray> ComputeCellsContainingSelectedPoints(
    vtkDataObject* data, vtkSignedCharArray* selectedPoints);

private:
  vtkSelector(const vtkSelector&) = delete;
  void operator=(const vtkSelector&) = delete;
};

#endif