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

  Program:   Visualization Toolkit
  Module:    vtkUnstructuredGridVolumeRayCastFunction.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 vtkUnstructuredGridVolumeRayCastFunction_h
#define vtkUnstructuredGridVolumeRayCastFunction_h

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

class vtkRenderer;
class vtkVolume;
class vtkUnstructuredGridVolumeRayCastIterator;

class VTKRENDERINGVOLUME_EXPORT vtkUnstructuredGridVolumeRayCastFunction : public vtkObject
{
public:
  vtkTypeMacro(vtkUnstructuredGridVolumeRayCastFunction,vtkObject);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

//BTX
  virtual void Initialize( vtkRenderer *ren, vtkVolume   *vol )=0;

  virtual void Finalize( )=0;


  virtual vtkUnstructuredGridVolumeRayCastIterator *NewIterator() = 0;
//ETX


protected:
  vtkUnstructuredGridVolumeRayCastFunction() {}
  ~vtkUnstructuredGridVolumeRayCastFunction() {}

private:
  vtkUnstructuredGridVolumeRayCastFunction(const vtkUnstructuredGridVolumeRayCastFunction&);  // Not implemented.
  void operator=(const vtkUnstructuredGridVolumeRayCastFunction&);  // Not implemented.
};

#endif