vtkVisibilitySort.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright 2003 Sandia Corporation
// SPDX-License-Identifier: LicenseRef-BSD-3-Clause-Sandia-USGov

#ifndef vtkVisibilitySort_h
#define vtkVisibilitySort_h

#include "vtkObject.h"
#include "vtkRenderingCoreModule.h" // For export macro
#include "vtkWrappingHints.h"       // For VTK_MARSHALAUTO

VTK_ABI_NAMESPACE_BEGIN
class vtkIdTypeArray;
class vtkDataSet;
class vtkMatrix4x4;
class vtkCamera;

class VTKRENDERINGCORE_EXPORT VTK_MARSHALAUTO vtkVisibilitySort : public vtkObject
{
public:
  vtkTypeMacro(vtkVisibilitySort, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  virtual void InitTraversal() = 0;
  virtual vtkIdTypeArray* GetNextCells() = 0;


  vtkSetClampMacro(MaxCellsReturned, int, 1, VTK_INT_MAX);
  vtkGetMacro(MaxCellsReturned, int);


  virtual void SetModelTransform(vtkMatrix4x4* mat);
  vtkGetObjectMacro(ModelTransform, vtkMatrix4x4);

  vtkGetObjectMacro(InverseModelTransform, vtkMatrix4x4);


  virtual void SetCamera(vtkCamera* camera);
  vtkGetObjectMacro(Camera, vtkCamera);


  virtual void SetInput(vtkDataSet* data);
  vtkGetObjectMacro(Input, vtkDataSet);


  vtkGetMacro(Direction, int);
  vtkSetMacro(Direction, int);
  void SetDirectionToBackToFront() { this->SetDirection(BACK_TO_FRONT); }
  void SetDirectionToFrontToBack() { this->SetDirection(FRONT_TO_BACK); }

  enum
  {
    BACK_TO_FRONT,
    FRONT_TO_BACK
  };


  bool UsesGarbageCollector() const override { return true; }

protected:
  vtkVisibilitySort();
  ~vtkVisibilitySort() override;

  vtkTimeStamp LastSortTime;

  vtkMatrix4x4* ModelTransform;
  vtkMatrix4x4* InverseModelTransform;
  vtkCamera* Camera;
  vtkDataSet* Input;

  int MaxCellsReturned;

  int Direction;

  void ReportReferences(vtkGarbageCollector* collector) override;

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

VTK_ABI_NAMESPACE_END
#endif // vtkVisibilitySort_h