vtkVisibilitySort.h

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

  Program:   Visualization Toolkit
  Module:    vtkVisibilitySort.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.

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

/*
 * Copyright 2003 Sandia Corporation.
 * Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
 * license for use of this work by or on behalf of the
 * U.S. Government. Redistribution and use in source and binary forms, with
 * or without modification, are permitted provided that this Notice and any
 * statement of authorship are reproduced on all copies.
 */

#ifndef vtkVisibilitySort_h
#define vtkVisibilitySort_h

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

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

class VTKRENDERINGCORE_EXPORT 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 };


  void Register(vtkObjectBase *o) override;
  void UnRegister(vtkObjectBase *o) override;

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;
};

#endif //vtkVisibilitySort_h