vtkExtractSelection.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkExtractSelection.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 vtkExtractSelection_h
#define vtkExtractSelection_h
 
#include "vtkDataObjectAlgorithm.h"
#include "vtkFiltersExtractionModule.h" // For export macro
 
#include "vtkSelectionNode.h" // for vtkSelectionNode::SelectionContent
#include "vtkSmartPointer.h"  // for smart pointer
 
class vtkSignedCharArray;
class vtkSelection;
class vtkSelectionNode;
class vtkSelector;
class vtkUnstructuredGrid;
class vtkTable;
 
class VTKFILTERSEXTRACTION_EXPORT vtkExtractSelection : public vtkDataObjectAlgorithm
{
public:
  static vtkExtractSelection* New();
  vtkTypeMacro(vtkExtractSelection, vtkDataObjectAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void SetSelectionConnection(vtkAlgorithmOutput* algOutput)
  {
    this->SetInputConnection(1, algOutput);
  }
 
 
  vtkSetMacro(PreserveTopology, bool);
  vtkGetMacro(PreserveTopology, bool);
  vtkBooleanMacro(PreserveTopology, bool);
 
protected:
  vtkExtractSelection();
  ~vtkExtractSelection() override;
 
  int RequestDataObject(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
  int RequestInformation(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  // Gets the attribute association of the selection.  Currently we support ROW, POINT, and CELL.
  // If the selection types are mismatched the boolean parameter will be set to false, otherwise
  // it will be true after the function returns.
  vtkDataObject::AttributeTypes GetAttributeTypeOfSelection(vtkSelection* sel, bool& sane);
 
  virtual vtkSmartPointer<vtkSelector> NewSelectionOperator(
    vtkSelectionNode::SelectionContent type);
 
  vtkSmartPointer<vtkDataObject> ExtractElements(vtkDataObject* block,
    vtkDataObject::AttributeTypes elementType, vtkSignedCharArray* insidednessArray);
 
  int FillInputPortInformation(int port, vtkInformation* info) override;
 
  void ExtractSelectedCells(
    vtkDataSet* input, vtkUnstructuredGrid* output, vtkSignedCharArray* cellInside);
  void ExtractSelectedPoints(
    vtkDataSet* input, vtkUnstructuredGrid* output, vtkSignedCharArray* pointInside);
  void ExtractSelectedRows(vtkTable* input, vtkTable* output, vtkSignedCharArray* rowsInside);
 
  bool PreserveTopology = false;
 
private:
  vtkExtractSelection(const vtkExtractSelection&) = delete;
  void operator=(const vtkExtractSelection&) = delete;
};
 
#endif