From: Timo Heister Date: Thu, 18 Jun 2020 14:00:38 +0000 (-0400) Subject: introduce GridTools::cell_measure for std::vector X-Git-Tag: v9.3.0-rc1~1405^2~1 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef6ef7b25aa554588bb726539a18bb8427703df8;p=dealii.git introduce GridTools::cell_measure for std::vector call cell_measure with a reference to CellData::vertices in ASPECT, which no longer compiles. Fix this by introducing an overload of cell_measure accepting an ArrayView. The means a std::vector works directly. Also switch the implementation around where the array calls the ArrayView implementation. --- diff --git a/include/deal.II/grid/grid_tools.h b/include/deal.II/grid/grid_tools.h index 86ff8c3261..5d36e157cd 100644 --- a/include/deal.II/grid/grid_tools.h +++ b/include/deal.II/grid/grid_tools.h @@ -225,7 +225,21 @@ namespace GridTools const unsigned int (&vertex_indices)[GeometryInfo::vertices_per_cell]); /** - * A version of the last function that can accept input for nonzero + * A variant of cell_measure() accepting an ArrayView instead of a + * fixed-sized array for @p vertex_indices. + * + * The parameter @p vertex_indices is expected to have + * GeometryInfo::vertices_per_cell entries. A std::vector is implicitly + * convertible to an ArrayView, so it can be passed directly. See the + * ArrayView class for more information. + */ + template + double + cell_measure(const std::vector> & all_vertices, + const ArrayView &vertex_indices); + + /** + * A version of the function above that can accept input for nonzero * codimension cases. This function only exists to aid generic programming * and calling it will just raise an exception. */ @@ -3128,23 +3142,17 @@ namespace GridTools namespace GridTools { - // declare specializations - template <> - double - cell_measure<1>(const std::vector> &, - const unsigned int (&)[GeometryInfo<1>::vertices_per_cell]); - - template <> - double - cell_measure<2>(const std::vector> &, - const unsigned int (&)[GeometryInfo<2>::vertices_per_cell]); - - template <> + template double - cell_measure<3>(const std::vector> &, - const unsigned int (&)[GeometryInfo<3>::vertices_per_cell]); - - + cell_measure( + const std::vector> &all_vertices, + const unsigned int (&indices)[GeometryInfo::vertices_per_cell]) + { + // We forward call to the ArrayView version: + const ArrayView view( + &indices[0], GeometryInfo::vertices_per_cell); + return cell_measure(all_vertices, view); + } template double diff --git a/source/grid/grid_tools_nontemplates.cc b/source/grid/grid_tools_nontemplates.cc index 706dbc4d42..126ea9ec8a 100644 --- a/source/grid/grid_tools_nontemplates.cc +++ b/source/grid/grid_tools_nontemplates.cc @@ -29,10 +29,11 @@ namespace GridTools { template <> double - cell_measure<1>( - const std::vector> &all_vertices, - const unsigned int (&vertex_indices)[GeometryInfo<1>::vertices_per_cell]) + cell_measure<1>(const std::vector> & all_vertices, + const ArrayView &vertex_indices) { + AssertDimension(vertex_indices.size(), GeometryInfo<1>::vertices_per_cell); + return all_vertices[vertex_indices[1]][0] - all_vertices[vertex_indices[0]][0]; } @@ -41,10 +42,11 @@ namespace GridTools template <> double - cell_measure<2>( - const std::vector> &all_vertices, - const unsigned int (&vertex_indices)[GeometryInfo<2>::vertices_per_cell]) + cell_measure<2>(const std::vector> & all_vertices, + const ArrayView &vertex_indices) { + AssertDimension(vertex_indices.size(), GeometryInfo<2>::vertices_per_cell); + /* Get the computation of the measure by this little Maple script. We use the blinear mapping of the unit quad to the real quad. However, @@ -100,10 +102,10 @@ namespace GridTools template <> double - cell_measure<3>( - const std::vector> &all_vertices, - const unsigned int (&vertex_indices)[GeometryInfo<3>::vertices_per_cell]) + cell_measure<3>(const std::vector> & all_vertices, + const ArrayView &vertex_indices) { + AssertDimension(vertex_indices.size(), GeometryInfo<3>::vertices_per_cell); // note that this is the // cell_measure based on the new // deal.II numbering. When called diff --git a/tests/grid/cell_measure_01.cc b/tests/grid/cell_measure_01.cc new file mode 100644 index 0000000000..1d38e83bb7 --- /dev/null +++ b/tests/grid/cell_measure_01.cc @@ -0,0 +1,93 @@ +// --------------------------------------------------------------------- +// +// Copyright (C) 2018 - 2020 by the deal.II authors +// +// This file is part of the deal.II library. +// +// The deal.II library is free software; you can use it, redistribute +// it, and/or modify it under the terms of the GNU Lesser General +// Public License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// The full text of the license can be found in the file LICENSE.md at +// the top level directory of deal.II. +// +// --------------------------------------------------------------------- + + + +// check GridTools::cell_measure() + +#include + +#include "../tests.h" + + +template +void +test() +{} + +template <> +void +test<1>() +{ + std::vector> points; + points.emplace_back(0.); + points.emplace_back(3.); + + unsigned int indices1[GeometryInfo<1>::vertices_per_cell] = {0, 1}; + std::vector indices2 = {0, 1}; + + deallog << "1d: " << GridTools::cell_measure(points, indices1) << " " + << GridTools::cell_measure(points, indices2) << std::endl; +} + +template <> +void +test<2>() +{ + std::vector> points; + points.emplace_back(0., 0.); + points.emplace_back(1., 0.); + points.emplace_back(0., 2.); + points.emplace_back(1., 2.); + + unsigned int indices1[GeometryInfo<2>::vertices_per_cell] = {0, 1, 2, 3}; + std::vector indices2 = {0, 1, 2, 3}; + + deallog << "2d: " << GridTools::cell_measure(points, indices1) << " " + << GridTools::cell_measure(points, indices2) << std::endl; +} + +template <> +void +test<3>() +{ + std::vector> points; + points.emplace_back(0., 0., 0.); + points.emplace_back(1., 0., 0.); + points.emplace_back(0., 2., 0.); + points.emplace_back(1., 2., 0.); + points.emplace_back(0., 0., 3.); + points.emplace_back(1., 0., 3.); + points.emplace_back(0., 2., 3.); + points.emplace_back(1., 2., 3.); + + unsigned int indices1[GeometryInfo<3>::vertices_per_cell] = { + 0, 1, 2, 3, 4, 5, 6, 7}; + std::vector indices2 = {0, 1, 2, 3, 4, 5, 6, 7}; + + deallog << "3d: " << GridTools::cell_measure(points, indices1) << " " + << GridTools::cell_measure(points, indices2) << std::endl; +} + +int +main() +{ + initlog(); + test<1>(); + test<2>(); + test<3>(); + + return 0; +} diff --git a/tests/grid/cell_measure_01.output b/tests/grid/cell_measure_01.output new file mode 100644 index 0000000000..b8280388f0 --- /dev/null +++ b/tests/grid/cell_measure_01.output @@ -0,0 +1,4 @@ + +DEAL::1d: 3.00000 3.00000 +DEAL::2d: 2.00000 2.00000 +DEAL::3d: 6.00000 6.00000