DataSetBuilderCurvilinear.h

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//============================================================================
//  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_cont_DataSetBuilderCurvilinear_h
#define vtk_m_cont_DataSetBuilderCurvilinear_h
 
#include <vtkm/cont/ArrayHandleSOA.h>
#include <vtkm/cont/CoordinateSystem.h>
#include <vtkm/cont/DataSet.h>
 
namespace vtkm
{
namespace cont
{
 
class VTKM_CONT_EXPORT DataSetBuilderCurvilinear
{
public:
  VTKM_CONT
  DataSetBuilderCurvilinear();
 
  template <typename T>
  VTKM_CONT static vtkm::cont::DataSet Create(const std::vector<T>& xVals,
                                              const std::string& coordsNm = "coords")
  {
    VTKM_ASSERT(xVals.size() > 0);
 
    std::vector<T> yVals(xVals.size(), 0), zVals(xVals.size(), 0);
    vtkm::Id dim = static_cast<vtkm::Id>(xVals.size());
    auto coords = vtkm::cont::make_ArrayHandleSOA<vtkm::Vec<T, 3>>({ xVals, yVals, zVals });
 
    return DataSetBuilderCurvilinear::Create(coords, { dim, 0, 0 }, 1, coordsNm);
  }
 
  template <typename T>
  VTKM_CONT static vtkm::cont::DataSet Create(const std::vector<T>& xVals,
                                              const std::vector<T>& yVals,
                                              const vtkm::Id2& dims,
                                              const std::string& coordsNm = "coords")
  {
    VTKM_ASSERT(xVals.size() > 0 && xVals.size() == yVals.size());
 
    std::vector<T> zVals(xVals.size(), 0);
    auto coords = vtkm::cont::make_ArrayHandleSOA<vtkm::Vec<T, 3>>({ xVals, yVals, zVals });
 
    return DataSetBuilderCurvilinear::Create(coords, { dims[0], dims[1], 0 }, 2, coordsNm);
  }
 
  template <typename T>
  VTKM_CONT static vtkm::cont::DataSet Create(const std::vector<T>& xVals,
                                              const std::vector<T>& yVals,
                                              const std::vector<T>& zVals,
                                              const vtkm::Id3& dims,
                                              const std::string& coordsNm = "coords")
  {
    VTKM_ASSERT(xVals.size() > 0 && xVals.size() == yVals.size());
    VTKM_ASSERT(xVals.size() == zVals.size());
 
    auto coords = vtkm::cont::make_ArrayHandleSOA<vtkm::Vec<T, 3>>({ xVals, yVals, zVals });
 
    return DataSetBuilderCurvilinear::Create(coords, dims, 3, coordsNm);
  }
 
  template <typename T>
  VTKM_CONT static vtkm::cont::DataSet Create(const std::vector<vtkm::Vec<T, 3>>& points,
                                              const vtkm::Id3& dims,
                                              const std::string& coordsNm = "coords")
  {
    auto coords = vtkm::cont::make_ArrayHandle(points);
    return DataSetBuilderCurvilinear::Create(coords, dims, 3, coordsNm);
  }
 
  template <typename CoordsType>
  VTKM_CONT static vtkm::cont::DataSet Create(const CoordsType& coords,
                                              const vtkm::Id3& dims,
                                              const std::string& coordsNm = "coords")
  {
    return DataSetBuilderCurvilinear::Create(coords, dims, 3, coordsNm);
  }
 
  template <typename CoordsType>
  VTKM_CONT static vtkm::cont::DataSet Create(const CoordsType& coords,
                                              const vtkm::Id2& dims,
                                              const std::string& coordsNm = "coords")
  {
    return DataSetBuilderCurvilinear::Create(coords, { dims[0], dims[1], 0 }, 2, coordsNm);
  }
 
  template <typename CoordsType>
  VTKM_CONT static vtkm::cont::DataSet Create(const CoordsType& coords,
                                              const std::string& coordsNm = "coords")
  {
    return DataSetBuilderCurvilinear::Create(
      coords, { coords.GetNumberOfValues(), 0, 0 }, 1, coordsNm);
  }
 
private:
  template <typename CoordsType>
  VTKM_CONT static vtkm::cont::DataSet Create(const CoordsType& coords,
                                              const vtkm::Id3& dims,
                                              const vtkm::Id& cellSetDim,
                                              const std::string& coordsNm = "coords")
  {
    vtkm::cont::DataSet ds;
    ds.AddCoordinateSystem(vtkm::cont::CoordinateSystem(coordsNm, coords));
 
    if (cellSetDim == 3)
    {
      VTKM_ASSERT(dims[0] >= 1 && dims[1] >= 1 && dims[2] >= 1);
      VTKM_ASSERT(coords.GetNumberOfValues() == dims[0] * dims[1] * dims[2]);
 
      vtkm::cont::CellSetStructured<3> cellSet;
      cellSet.SetPointDimensions(dims);
      ds.SetCellSet(cellSet);
    }
    else if (cellSetDim == 2)
    {
      VTKM_ASSERT(dims[0] >= 1 && dims[1] >= 1 && dims[2] == 0);
      VTKM_ASSERT(coords.GetNumberOfValues() == dims[0] * dims[1]);
 
      vtkm::cont::CellSetStructured<2> cellSet;
      cellSet.SetPointDimensions({ dims[0], dims[1] });
      ds.SetCellSet(cellSet);
    }
    else if (cellSetDim == 1)
    {
      VTKM_ASSERT(dims[0] >= 1 && dims[1] == 0 && dims[2] == 0);
      VTKM_ASSERT(coords.GetNumberOfValues() == dims[0]);
 
      vtkm::cont::CellSetStructured<1> cellSet;
      cellSet.SetPointDimensions(dims[0]);
      ds.SetCellSet(cellSet);
    }
    else
      throw vtkm::cont::ErrorBadValue("Unsupported CellSetStructured dimension.");
 
    return ds;
  }
};
 
} // namespace cont
} // namespace vtkm
 
#endif //vtk_m_cont_DataSetBuilderCurvilinear_h