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
 
#include <set> // for std::set
 
class vtkCompositeDataSet;
class vtkDataObject;
class vtkSelectionNode;
class vtkSignedCharArray;
class vtkTable;
class vtkDataObjectTree;
class vtkUniformGridAMR;
 
class VTKFILTERSEXTRACTION_EXPORT vtkSelector : public vtkObject
{
public:
  vtkTypeMacro(vtkSelector, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  virtual void Initialize(vtkSelectionNode* node);
 
  virtual void Finalize() {}
 
  virtual void Execute(vtkDataObject* input, vtkDataObject* output);
 
 
  vtkSetMacro(InsidednessArrayName, std::string);
  vtkGetMacro(InsidednessArrayName, std::string);
protected:
  vtkSelector();
  ~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 ComputeSelectedElements(
    vtkDataObject* input, vtkSignedCharArray* insidednessArray) = 0;
 
  enum SelectionMode
  {
    INCLUDE,
    EXCLUDE,
    INHERIT
  };
 
  virtual SelectionMode GetAMRBlockSelection(unsigned int level, unsigned int index);
 
  virtual SelectionMode GetBlockSelection(unsigned int compositeIndex);
 
  vtkSmartPointer<vtkSignedCharArray> CreateInsidednessArray(vtkIdType numElems);
 
  vtkSmartPointer<vtkSignedCharArray> ComputeCellsContainingSelectedPoints(
    vtkDataObject* data, vtkSignedCharArray* selectedPoints);
 
  void ExpandToConnectedElements(vtkDataObject* output);
 
private:
  vtkSelector(const vtkSelector&) = delete;
  void operator=(const vtkSelector&) = delete;
 
  void ProcessBlock(vtkDataObject* inputBlock, vtkDataObject* outputBlock, bool forceFalse);
  void ProcessAMR(vtkUniformGridAMR* input, vtkCompositeDataSet* output);
  void ProcessDataObjectTree(vtkDataObjectTree* input, vtkDataObjectTree* output,
    SelectionMode inheritedSelectionMode, unsigned int compositeIndex = 0);
  void ProcessSelectors(vtkCompositeDataSet* input);
 
  std::set<unsigned int> SubsetCompositeIds;
};
 
#endif