//============================================================================
//  Copyright (c) Kitware, Inc.
//  All rights reserved.
//  See LICENSE.txt 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 vtk_m_rendering_raytracing_Triangle_Extractor_h
#define vtk_m_rendering_raytracing_Triangle_Extractor_h

#include <vtkm/cont/DataSet.h>
#include <vtkm/cont/Field.h>
#include <vtkm/rendering/vtkm_rendering_export.h>

namespace vtkm
{
namespace rendering
{
namespace raytracing
{

class VTKM_RENDERING_EXPORT TriangleExtractor
{
protected:
  vtkm::cont::ArrayHandle<vtkm::Id4> Triangles; // (cellid, v0, v1, v2)
public:
  void ExtractCells(const vtkm::cont::UnknownCellSet& cells);

  void ExtractCells(const vtkm::cont::UnknownCellSet& cells, const vtkm::cont::Field& ghostField);

  vtkm::cont::ArrayHandle<vtkm::Id4> GetTriangles();
  vtkm::Id GetNumberOfTriangles() const;
}; // class TriangleExtractor
}
}
} //namespace vtkm::rendering::raytracing
#endif //vtk_m_rendering_raytracing_Triangle_Extractor_h