vtkFrustumSelector.h

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

  Program:   Visualization Toolkit
  Module:    vtkFrustumSelector.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 vtkFrustumSelector_h
#define vtkFrustumSelector_h

#include "vtkFiltersExtractionModule.h" // For export macro
#include "vtkSelector.h"

#include "vtkSmartPointer.h" // for smart pointer

class vtkDataSet;
class vtkPlanes;
class vtkSignedCharArray;

class VTKFILTERSEXTRACTION_EXPORT vtkFrustumSelector : public vtkSelector
{
public:
  static vtkFrustumSelector *New();
  vtkTypeMacro(vtkFrustumSelector, vtkSelector);
  void PrintSelf(ostream& os, vtkIndent indent) override;

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

  vtkMTimeType GetMTime() override;


  void SetFrustum(vtkPlanes*);
  vtkPlanes* GetFrustum();

protected:
  vtkFrustumSelector(vtkPlanes *f=nullptr);
  ~vtkFrustumSelector() override;

  vtkSmartPointer<vtkPlanes> Frustum;

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

  void CreateFrustum(double vertices[32]);

  void ComputeSelectedPoints(vtkDataSet* input, vtkSignedCharArray* pointsInside);
  void ComputeSelectedCells(vtkDataSet* input, vtkSignedCharArray* cellsInside);

  int OverallBoundsTest(double bounds[6]);

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

#endif