text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkProjectedAAHexahedraMapper.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.
  
  =========================================================================*/
  // .NAME vtkProjectedAAHexahedraMapper - volume mapper for axis-aligned hexahedra
  // .SECTION Description
  // High quality volume renderer for axis-aligned hexahedra
  
  // .SECTION Implementation
  // Implementation by Stephane Marchesin (stephane.marchesin@gmail.com)
  // CEA/DIF - Commissariat a l'Energie Atomique, Centre DAM Ile-De-France
  // BP12, F-91297 Arpajon, France.
  //
  // This mapper implements the paper
  // "High-Quality, Semi-Analytical Volume Rendering for AMR Data",
  // Stephane Marchesin and Guillaume Colin de Verdiere, IEEE Vis 2009.
  
  #ifndef __vtkProjectedAAHexahedraMapper_h
  #define __vtkProjectedAAHexahedraMapper_h
  
  #include "vtkUnstructuredGridVolumeMapper.h"
  
  class vtkFloatArray;
  class vtkPoints;
  class vtkUnsignedCharArray;
  class vtkVisibilitySort;
  class vtkVolumeProperty;
  class vtkRenderWindow;
  
  class VTK_VOLUMERENDERING_EXPORT vtkProjectedAAHexahedraMapper : public vtkUnstructuredGridVolumeMapper
  {
  public:
    vtkTypeMacro(vtkProjectedAAHexahedraMapper,
                 vtkUnstructuredGridVolumeMapper);
    static vtkProjectedAAHexahedraMapper *New();
    virtual void PrintSelf(ostream &os, vtkIndent indent);
  
    // Description:
    // Algorithm used to sort the cells according to viewpoint of the camera.
    // Initial value is a vtkCellCenterDepthSort object.
    virtual void SetVisibilitySort(vtkVisibilitySort *sort);
    vtkGetObjectMacro(VisibilitySort, vtkVisibilitySort);
  
    // Description:
    // Check if the required OpenGL extensions are supported by the OpenGL
    // context attached to the render window `w'.
    virtual bool IsRenderSupported(vtkRenderWindow *w)=0;
  
  protected:
    vtkProjectedAAHexahedraMapper();
    ~vtkProjectedAAHexahedraMapper();
  
    // Description:
    // The visibility sort will probably make a reference loop by holding a
    // reference to the input.
    virtual void ReportReferences(vtkGarbageCollector *collector);
  
    vtkVisibilitySort *VisibilitySort;
  
  private:
    vtkProjectedAAHexahedraMapper(const vtkProjectedAAHexahedraMapper &);  // Not Implemented.
    void operator=(const vtkProjectedAAHexahedraMapper &);  // Not Implemented.
  };
  
  #endif
  