utilities.h

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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2023 - 2025 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
 
#ifndef dealii_vtk_utilities_h
#define dealii_vtk_utilities_h
 
#include <deal.II/base/config.h>
 
#include <deal.II/base/exceptions.h>
#include <deal.II/base/point.h>
 
#ifdef DEAL_II_WITH_VTK
 
#  include <vtkDoubleArray.h>
 
DEAL_II_NAMESPACE_OPEN

namespace VTKWrappers
{
  template <int dim>
  inline vtkSmartPointer<vtkDoubleArray>
  dealii_point_to_vtk_array(const ::Point<dim> &p);
 
#  ifndef DOXYGEN
  // Template implementations
 
  template <int dim>
  inline vtkSmartPointer<vtkDoubleArray>
  dealii_point_to_vtk_array(const ::Point<dim> &p)
  {
    vtkSmartPointer<vtkDoubleArray> p_vtk =
      vtkSmartPointer<vtkDoubleArray>::New();
 
    p_vtk->SetNumberOfComponents(dim);
    p_vtk->SetNumberOfTuples(1);
 
    for (int d = 0; d < dim; ++d)
      p_vtk->FillComponent(d, p[d]);
 
    return p_vtk;
  }
 
#  endif
 
} // namespace VTKWrappers
 
DEAL_II_NAMESPACE_CLOSE
 
#else
 
// Make sure the scripts that create the C++20 module input files have
// something to latch on if the preprocessor #ifdef above would
// otherwise lead to an empty content of the file.
DEAL_II_NAMESPACE_OPEN
DEAL_II_NAMESPACE_CLOSE
 
#endif
#endif