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| 1 | // SPDX-FileCopyrightText: 2022-2023 Dennis Gläser <dennis.glaeser@iws.uni-stuttgart.de> | ||
| 2 | // SPDX-License-Identifier: MIT | ||
| 3 | /*! | ||
| 4 | * \file | ||
| 5 | * \ingroup VTK | ||
| 6 | * \copydoc GridFormat::VTK::PXMLReader | ||
| 7 | */ | ||
| 8 | #ifndef GRIDFORMAT_VTK_PXML_READER_HPP_ | ||
| 9 | #define GRIDFORMAT_VTK_PXML_READER_HPP_ | ||
| 10 | |||
| 11 | #include <array> | ||
| 12 | #include <string> | ||
| 13 | #include <optional> | ||
| 14 | #include <iterator> | ||
| 15 | #include <filesystem> | ||
| 16 | #include <algorithm> | ||
| 17 | #include <iterator> | ||
| 18 | #include <utility> | ||
| 19 | #include <cmath> | ||
| 20 | |||
| 21 | #include <gridformat/common/ranges.hpp> | ||
| 22 | #include <gridformat/common/field.hpp> | ||
| 23 | #include <gridformat/common/md_index.hpp> | ||
| 24 | #include <gridformat/common/md_layout.hpp> | ||
| 25 | #include <gridformat/common/flat_index_mapper.hpp> | ||
| 26 | #include <gridformat/common/empty_field.hpp> | ||
| 27 | #include <gridformat/common/field_transformations.hpp> | ||
| 28 | #include <gridformat/common/exceptions.hpp> | ||
| 29 | |||
| 30 | #include <gridformat/grid/reader.hpp> | ||
| 31 | #include <gridformat/parallel/communication.hpp> | ||
| 32 | |||
| 33 | #include <gridformat/vtk/common.hpp> | ||
| 34 | #include <gridformat/vtk/xml.hpp> | ||
| 35 | |||
| 36 | namespace GridFormat::VTK { | ||
| 37 | |||
| 38 | /*! | ||
| 39 | * \ingroup VTK | ||
| 40 | * \brief Base class for readers of parallel vtk-xml file formats. | ||
| 41 | * \details Constructors of derived classes for readers of unstructured | ||
| 42 | * grids may expose the `merge_exceeding_pieces` option. If set | ||
| 43 | * to true, then parallel I/O with less ranks than pieces in the | ||
| 44 | * PVTK file is done such that the last rank reads in and merges | ||
| 45 | * all remaining pieces. Otherwise, only as many pieces as ranks | ||
| 46 | * are read. On the other hand, if there are more ranks than pieces, | ||
| 47 | * some ranks will not read in any data (i.e. the grids are empty). | ||
| 48 | */ | ||
| 49 | template<std::derived_from<GridReader> PieceReader> | ||
| 50 | class PXMLReaderBase : public GridReader { | ||
| 51 | public: | ||
| 52 | 2612 | virtual ~PXMLReaderBase() = default; | |
| 53 | |||
| 54 | 1032 | PXMLReaderBase(PXMLReaderBase&&) = default; | |
| 55 | PXMLReaderBase(const PXMLReaderBase&) = delete; | ||
| 56 | 1 | PXMLReaderBase& operator=(PXMLReaderBase&&) = default; | |
| 57 | PXMLReaderBase& operator=(const PXMLReaderBase&) = delete; | ||
| 58 | |||
| 59 | 1534 | PXMLReaderBase(std::string vtk_grid_type) | |
| 60 | 1534 | : _vtk_grid_type{std::move(vtk_grid_type)} | |
| 61 | 1534 | {} | |
| 62 | |||
| 63 | explicit PXMLReaderBase(std::string vtk_grid_type, const NullCommunicator&) | ||
| 64 | : PXMLReaderBase(std::move(vtk_grid_type)) | ||
| 65 | {} | ||
| 66 | |||
| 67 | template<Concepts::Communicator C> | ||
| 68 | 953 | explicit PXMLReaderBase(std::string vtk_grid_type, | |
| 69 | const C& comm, | ||
| 70 | std::optional<bool> merge_exceeding_pieces = {}) | ||
| 71 |
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953 | : PXMLReaderBase(std::move(vtk_grid_type)) { |
| 72 |
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953 | _num_ranks = Parallel::size(comm); |
| 73 |
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953 | _rank = Parallel::rank(comm); |
| 74 | 953 | _merge_exceeding = merge_exceeding_pieces; | |
| 75 | 953 | } | |
| 76 | |||
| 77 | protected: | ||
| 78 | enum class FieldType { point, cell }; | ||
| 79 | |||
| 80 | 4065 | const std::vector<PieceReader>& _readers() const { | |
| 81 | 4065 | return _piece_readers; | |
| 82 | } | ||
| 83 | |||
| 84 | 633 | const std::string _grid_type() const { | |
| 85 | 633 | return _vtk_grid_type; | |
| 86 | } | ||
| 87 | |||
| 88 | 19690 | std::size_t _num_process_pieces() const { | |
| 89 | 19690 | return _piece_readers.size(); | |
| 90 | } | ||
| 91 | |||
| 92 | 633 | std::optional<bool> _merge_exceeding_pieces_option() const { | |
| 93 | 633 | return _merge_exceeding; | |
| 94 | } | ||
| 95 | |||
| 96 | 1022 | XMLReaderHelper _read_pvtk_file(const std::string& filename, typename GridReader::FieldNames& fields) { | |
| 97 | 1022 | _filename = filename; | |
| 98 | 1022 | auto helper = XMLReaderHelper::make_from(filename, _vtk_grid_type); | |
| 99 |
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1018 | _num_pieces_in_file = Ranges::size(_pieces_paths(helper)); |
| 100 |
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1018 | _read_pieces(helper); |
| 101 |
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1018 | if (_piece_readers.size() > 0) { |
| 102 |
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1017 | std::ranges::copy(point_field_names(_piece_readers.front()), std::back_inserter(fields.point_fields)); |
| 103 |
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1017 | std::ranges::copy(cell_field_names(_piece_readers.front()), std::back_inserter(fields.cell_fields)); |
| 104 |
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1017 | std::ranges::copy(meta_data_field_names(_piece_readers.front()), std::back_inserter(fields.meta_data_fields)); |
| 105 | } | ||
| 106 | |||
| 107 |
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1050 | if (std::ranges::any_of(_piece_readers | std::views::drop(1), [&] (const auto& reader) { |
| 108 |
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39 | return !std::ranges::equal(point_field_names(reader), fields.point_fields); |
| 109 | })) | ||
| 110 | ✗ | throw IOError("All pieces must define the same point fields"); | |
| 111 |
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1050 | if (std::ranges::any_of(_piece_readers | std::views::drop(1), [&] (const auto& reader) { |
| 112 |
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39 | return !std::ranges::equal(cell_field_names(reader), fields.cell_fields); |
| 113 | })) | ||
| 114 | ✗ | throw IOError("All pieces must define the same cell fields"); | |
| 115 | 1018 | return helper; | |
| 116 | ✗ | } | |
| 117 | |||
| 118 | 16 | void _close_pvtk_file() { | |
| 119 | 16 | _filename.reset(); | |
| 120 | 16 | _piece_readers.clear(); | |
| 121 | 16 | _num_pieces_in_file = 0; | |
| 122 | 16 | } | |
| 123 | |||
| 124 | private: | ||
| 125 | 389 | void _open(const std::string& filename, typename GridReader::FieldNames& fields) override { | |
| 126 |
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389 | _read_pvtk_file(filename, fields); |
| 127 | 385 | } | |
| 128 | |||
| 129 | 8 | void _close() override { | |
| 130 | 8 | _close_pvtk_file(); | |
| 131 | 8 | } | |
| 132 | |||
| 133 | 1922 | std::size_t _number_of_cells() const override { | |
| 134 |
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2876 | auto num_cells_view = _piece_readers | std::views::transform([] (const auto& reader) { |
| 135 | 984 | return reader.number_of_cells(); | |
| 136 | }); | ||
| 137 |
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1922 | return std::accumulate( |
| 138 | std::ranges::begin(num_cells_view), | ||
| 139 | std::ranges::end(num_cells_view), | ||
| 140 | std::size_t{0} | ||
| 141 | 3844 | ); | |
| 142 | } | ||
| 143 | |||
| 144 | 87 | std::size_t _number_of_pieces() const override { | |
| 145 | 87 | return _num_pieces_in_file; | |
| 146 | } | ||
| 147 | |||
| 148 | 16 | bool _is_sequence() const override { | |
| 149 | 16 | return false; | |
| 150 | } | ||
| 151 | |||
| 152 | 333 | FieldPtr _meta_data_field(std::string_view name) const override { | |
| 153 | 333 | return _piece_readers.front().meta_data_field(name); | |
| 154 | } | ||
| 155 | |||
| 156 | 527 | FieldPtr _points() const override { | |
| 157 |
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1340 | return _merge([] (const PieceReader& reader) { return reader.points(); }, FieldType::point); |
| 158 | } | ||
| 159 | |||
| 160 | 3606 | FieldPtr _cell_field(std::string_view name) const override { | |
| 161 |
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9270 | return _merge([&] (const PieceReader& reader) { return reader.cell_field(name); }, FieldType::cell); |
| 162 | } | ||
| 163 | |||
| 164 | 3638 | FieldPtr _point_field(std::string_view name) const override { | |
| 165 |
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9350 | return _merge([&] (const PieceReader& reader) { return reader.point_field(name); }, FieldType::point); |
| 166 | } | ||
| 167 | |||
| 168 | template<std::invocable<const PieceReader&> FieldGetter> | ||
| 169 | requires(std::same_as<std::invoke_result_t<FieldGetter, const PieceReader&>, FieldPtr>) | ||
| 170 | 8044 | FieldPtr _merge(const FieldGetter& get_field, FieldType type) const { | |
| 171 |
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8044 | if (_num_process_pieces() == 0) |
| 172 | ✗ | return make_field_ptr(EmptyField{float64}); | |
| 173 |
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8044 | if (_num_process_pieces() == 1) |
| 174 |
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7278 | return get_field(_piece_readers.front()); |
| 175 | |||
| 176 | 766 | std::vector<FieldPtr> field_pieces; | |
| 177 |
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1532 | std::ranges::copy( |
| 178 | 766 | _piece_readers | |
| 179 |
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1545 | | std::views::transform([&] (const PieceReader& reader) { return get_field(reader); }), |
| 180 | std::back_inserter(field_pieces) | ||
| 181 | ); | ||
| 182 |
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766 | return _merge_field_pieces(std::move(field_pieces), type); |
| 183 | 766 | } | |
| 184 | |||
| 185 | virtual FieldPtr _merge_field_pieces(std::vector<FieldPtr>&&, FieldType) const = 0; | ||
| 186 | |||
| 187 | 2986 | std::ranges::range auto _pieces_paths(const XMLReaderHelper& helper) const { | |
| 188 |
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2986 | return children(helper.get(_vtk_grid_type)) |
| 189 |
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13209 | | std::views::filter([&] (const XMLElement& e) { return e.name() == "Piece"; }) |
| 190 |
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10074 | | std::views::transform([&] (const XMLElement& p) { return _get_piece_path(p.get_attribute("Source")); }); |
| 191 | } | ||
| 192 | |||
| 193 | 1088 | std::filesystem::path _get_piece_path(const std::string& piece_filename) const { | |
| 194 |
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1088 | std::filesystem::path piece_path{piece_filename}; |
| 195 |
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1088 | if (piece_path.is_absolute()) |
| 196 | ✗ | return piece_path; | |
| 197 |
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1088 | return std::filesystem::path{_filename.value()}.parent_path() / piece_filename; |
| 198 | 1088 | } | |
| 199 | |||
| 200 | 1018 | void _read_pieces(const XMLReaderHelper& helper) { | |
| 201 |
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1018 | if (_num_ranks) |
| 202 | 949 | _read_parallel_piece(helper); | |
| 203 | else | ||
| 204 |
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197 | std::ranges::for_each(_pieces_paths(helper), [&] (const std::filesystem::path& path) { |
| 205 |
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75 | _piece_readers.emplace_back(PieceReader{}).open(path); |
| 206 | }); | ||
| 207 | 1018 | } | |
| 208 | |||
| 209 | 949 | void _read_parallel_piece(const XMLReaderHelper& helper) { | |
| 210 |
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949 | const auto num_pieces = Ranges::size(_pieces_paths(helper)); |
| 211 |
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949 | if (num_pieces < _num_ranks.value() && _rank.value() == 0) |
| 212 |
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1 | this->_log_warning( |
| 213 | "PVTK file defines less pieces than there are ranks. The grids on some ranks will be empty." | ||
| 214 | ); | ||
| 215 |
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949 | if (num_pieces > _num_ranks.value() && !_merge_exceeding.has_value() && _rank.value() == 0) |
| 216 | ✗ | this->_log_warning( | |
| 217 | "PVTK file defines more pieces than used ranks. Will only read the first " | ||
| 218 | ✗ | + std::to_string(_num_ranks.value()) + " pieces" | |
| 219 | ); | ||
| 220 | |||
| 221 |
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949 | const bool is_last_rank = _rank.value() == _num_ranks.value() - 1; |
| 222 |
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949 | const bool merge_final_pieces = is_last_rank && _merge_exceeding.value_or(false); |
| 223 |
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949 | const std::size_t my_num_pieces = merge_final_pieces ? Ranges::size(_pieces_paths(helper)) - _rank.value() : 1; |
| 224 | |||
| 225 |
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949 | std::ranges::for_each( |
| 226 |
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949 | _pieces_paths(helper) |
| 227 |
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1898 | | std::views::drop(_rank.value()) |
| 228 |
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1898 | | std::views::take(my_num_pieces), |
| 229 | 966 | [&] (const std::filesystem::path& path) { | |
| 230 |
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483 | _piece_readers.emplace_back(PieceReader{}).open(path); |
| 231 | } | ||
| 232 | ); | ||
| 233 | 949 | } | |
| 234 | |||
| 235 | std::string _vtk_grid_type; | ||
| 236 | |||
| 237 | std::optional<unsigned int> _num_ranks; | ||
| 238 | std::optional<unsigned int> _rank; | ||
| 239 | std::optional<bool> _merge_exceeding; | ||
| 240 | |||
| 241 | std::optional<std::string> _filename; | ||
| 242 | std::vector<PieceReader> _piece_readers; | ||
| 243 | std::size_t _num_pieces_in_file = 0; | ||
| 244 | }; | ||
| 245 | |||
| 246 | |||
| 247 | /*! | ||
| 248 | * \ingroup VTK | ||
| 249 | * \brief Base class for readers of parallel vtk-xml file formats for unstructured grids. | ||
| 250 | * \copydetails PXMLReaderBase | ||
| 251 | */ | ||
| 252 | template<std::derived_from<GridReader> PieceReader> | ||
| 253 | class PXMLUnstructuredGridReader : public PXMLReaderBase<PieceReader> { | ||
| 254 | using ParentType = PXMLReaderBase<PieceReader>; | ||
| 255 | public: | ||
| 256 | using ParentType::ParentType; | ||
| 257 | |||
| 258 | private: | ||
| 259 | 756 | std::size_t _number_of_points() const override { | |
| 260 |
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1118 | auto num_points_view = this->_readers() | std::views::transform([] (const auto& reader) { |
| 261 | 412 | return reader.number_of_points(); | |
| 262 | }); | ||
| 263 |
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756 | return std::accumulate( |
| 264 | std::ranges::begin(num_points_view), | ||
| 265 | std::ranges::end(num_points_view), | ||
| 266 | std::size_t{0} | ||
| 267 | 1512 | ); | |
| 268 | } | ||
| 269 | |||
| 270 | 473 | void _visit_cells(const typename GridReader::CellVisitor& visitor) const override { | |
| 271 | 473 | std::size_t offset = 0; | |
| 272 |
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937 | std::ranges::for_each(this->_readers(), [&] (const PieceReader& reader) { |
| 273 |
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10568 | reader.visit_cells([&] (CellType ct, std::vector<std::size_t> corners) { |
| 274 | 25816 | std::ranges::for_each(corners, [&] (auto& value) { value += offset; }); | |
| 275 | 5176 | visitor(ct, corners); | |
| 276 | }); | ||
| 277 | 248 | offset += reader.number_of_points(); | |
| 278 | }); | ||
| 279 | 473 | } | |
| 280 | |||
| 281 | 283 | FieldPtr _merge_field_pieces(std::vector<FieldPtr>&& pieces, ParentType::FieldType) const override { | |
| 282 |
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283 | return make_field_ptr(MergedField{std::move(pieces)}); |
| 283 | } | ||
| 284 | }; | ||
| 285 | |||
| 286 | |||
| 287 | /*! | ||
| 288 | * \ingroup VTK | ||
| 289 | * \brief Base class for readers of parallel vtk-xml file formats for structured grids. | ||
| 290 | * \copydetails PXMLReaderBase | ||
| 291 | * \note This implementation does not support overlapping partitions | ||
| 292 | */ | ||
| 293 | template<std::derived_from<GridReader> PieceReader> | ||
| 294 | class PXMLStructuredGridReader : public PXMLReaderBase<PieceReader> { | ||
| 295 | using ParentType = PXMLReaderBase<PieceReader>; | ||
| 296 | public: | ||
| 297 | using ParentType::ParentType; | ||
| 298 | |||
| 299 | protected: | ||
| 300 | struct StructuredGridSpecs { | ||
| 301 | std::array<std::size_t, 6> extents; | ||
| 302 | std::optional<std::array<double, 3>> spacing; // for image grids | ||
| 303 | std::optional<std::array<double, 3>> origin; // for image grids | ||
| 304 | std::array<double, 9> direction{ // for image grids | ||
| 305 | 1., 0., 0., 0., 1., 0., 0., 0., 1. | ||
| 306 | }; | ||
| 307 | }; | ||
| 308 | |||
| 309 | 453 | const StructuredGridSpecs& _specs() const { | |
| 310 |
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453 | if (!_grid_specs.has_value()) |
| 311 | ✗ | throw InvalidState("No data has been read"); | |
| 312 | 453 | return _grid_specs.value(); | |
| 313 | } | ||
| 314 | |||
| 315 | private: | ||
| 316 | 633 | void _open(const std::string& filename, typename GridReader::FieldNames& names) override { | |
| 317 |
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633 | if (this->_merge_exceeding_pieces_option().value_or(false)) |
| 318 | ✗ | throw IOError("Parallel I/O of structured vtk files does not support the 'merge_exceeding_pieces' option"); | |
| 319 | |||
| 320 |
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633 | auto helper = ParentType::_read_pvtk_file(filename, names); |
| 321 |
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633 | const XMLElement& vtk_grid = helper.get(this->_grid_type()); |
| 322 |
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633 | if (vtk_grid.get_attribute_or(std::size_t{0}, "GhostLevel") > 0) |
| 323 | ✗ | throw IOError("GhostLevel > 0 not yet supported for parallel I/O of structured vtk files."); | |
| 324 | |||
| 325 | 633 | StructuredGridSpecs& specs = _grid_specs.emplace(); | |
| 326 |
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633 | specs.extents = Ranges::array_from_string<std::size_t, 6>(vtk_grid.get_attribute("WholeExtent")); |
| 327 |
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633 | if (specs.extents[0] != 0 || specs.extents[2] != 0 || specs.extents[4] != 0) |
| 328 | ✗ | throw ValueError("'WholeExtent' is expected to have no offset (e.g. have the shape 0 X 0 Y 0 Z)"); | |
| 329 |
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633 | if (vtk_grid.has_attribute("Origin")) |
| 330 |
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275 | specs.origin = Ranges::array_from_string<double, 3>(vtk_grid.get_attribute("Origin")); |
| 331 |
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633 | if (vtk_grid.has_attribute("Spacing")) |
| 332 |
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275 | specs.spacing = Ranges::array_from_string<double, 3>(vtk_grid.get_attribute("Spacing")); |
| 333 |
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633 | if (vtk_grid.has_attribute("Direction")) |
| 334 |
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275 | specs.direction = Ranges::array_from_string<double, 9>(vtk_grid.get_attribute("Direction")); |
| 335 | 633 | } | |
| 336 | |||
| 337 | 8 | void _close() override { | |
| 338 | 8 | ParentType::_close_pvtk_file(); | |
| 339 | 8 | _grid_specs.reset(); | |
| 340 | 8 | } | |
| 341 | |||
| 342 | 3 | typename GridReader::Vector _origin() const override { | |
| 343 |
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3 | if (!_specs().origin.has_value()) |
| 344 | ✗ | throw ValueError("PVTK file does not define the origin for '" + this->_grid_type() + "'"); | |
| 345 |
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3 | if (this->_num_process_pieces() == 1) { |
| 346 | ✗ | const auto& specs = _specs(); | |
| 347 | ✗ | return CommonDetail::compute_piece_origin( | |
| 348 | specs.origin.value(), | ||
| 349 | ✗ | _spacing(), | |
| 350 | ✗ | this->_readers().at(0).location().lower_left, | |
| 351 | ✗ | specs.direction | |
| 352 | ✗ | ); | |
| 353 | } else { // use global origin | ||
| 354 | 3 | return _specs().origin.value(); | |
| 355 | } | ||
| 356 | } | ||
| 357 | |||
| 358 | 3 | typename GridReader::Vector _spacing() const override { | |
| 359 |
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3 | if (!_specs().spacing.has_value()) |
| 360 | ✗ | throw ValueError("PVTK file does not define the spacing for '" + this->_grid_type() + "'"); | |
| 361 | 3 | return _specs().spacing.value(); | |
| 362 | } | ||
| 363 | |||
| 364 | ✗ | typename GridReader::Vector _basis_vector(unsigned int i) const override { | |
| 365 | ✗ | const auto& direction = _specs().direction; | |
| 366 | ✗ | return {direction.at(i), direction.at(i+3), direction.at(i+6)}; | |
| 367 | } | ||
| 368 | |||
| 369 | ✗ | typename GridReader::PieceLocation _location() const override { | |
| 370 | typename GridReader::PieceLocation result; | ||
| 371 | |||
| 372 | ✗ | if (this->_num_process_pieces() == 1) { | |
| 373 | ✗ | result = this->_readers().at(0).location(); | |
| 374 | } else { // use "WholeExtent" | ||
| 375 | ✗ | const auto& specs = _specs(); | |
| 376 | ✗ | result.lower_left = {specs.extents[0], specs.extents[2], specs.extents[4]}; | |
| 377 | ✗ | result.upper_right = {specs.extents[1], specs.extents[3], specs.extents[5]}; | |
| 378 | } | ||
| 379 | |||
| 380 | ✗ | return result; | |
| 381 | } | ||
| 382 | |||
| 383 | 1667 | std::size_t _number_of_points() const override { | |
| 384 |
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1667 | if (this->_num_process_pieces() == 0) |
| 385 | ✗ | return 0; | |
| 386 |
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1667 | if (this->_num_process_pieces() == 1) |
| 387 | 1646 | return this->_readers().at(0).number_of_points(); | |
| 388 |
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21 | return CommonDetail::number_of_entities(_whole_point_extents()); |
| 389 | } | ||
| 390 | |||
| 391 | 775 | void _visit_cells(const typename GridReader::CellVisitor& visitor) const override { | |
| 392 |
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775 | if (this->_num_process_pieces() == 1) |
| 393 | 766 | this->_readers().at(0).visit_cells(visitor); | |
| 394 | else | ||
| 395 | 9 | CommonDetail::visit_structured_cells(visitor, _specs().extents); | |
| 396 | 775 | } | |
| 397 | |||
| 398 | 405 | FieldPtr _merge_field_pieces(std::vector<FieldPtr>&& pieces, ParentType::FieldType type) const override { | |
| 399 |
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495 | auto whole_grid_extents = type == ParentType::FieldType::point ? _whole_point_extents() : [&] () { |
| 400 | 108 | auto result = _specs().extents; | |
| 401 | // avoid zeroes s.t. the index mappers map properly | ||
| 402 | 108 | result[1] = std::max(result[1], std::size_t{1}); | |
| 403 | 108 | result[3] = std::max(result[3], std::size_t{1}); | |
| 404 | 108 | result[5] = std::max(result[5], std::size_t{1}); | |
| 405 | 108 | return result; | |
| 406 |
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198 | } (); |
| 407 |
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405 | auto num_entities = CommonDetail::number_of_entities(whole_grid_extents); |
| 408 |
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405 | auto precision = pieces.at(0)->precision(); |
| 409 |
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588 | MDLayout whole_field_layout = [&] () { |
| 410 |
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222 | const auto first_layout = pieces.at(0)->layout(); |
| 411 |
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222 | std::vector<std::size_t> dims(first_layout.begin(), first_layout.end()); |
| 412 |
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222 | dims.at(0) = num_entities; |
| 413 |
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444 | return MDLayout{std::move(dims)}; |
| 414 | 222 | } (); | |
| 415 |
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405 | _check_fields_compatibility(pieces, whole_field_layout, precision); |
| 416 | |||
| 417 | 405 | std::vector<MDLayout> pieces_layouts; | |
| 418 | 405 | std::vector<MDIndex> pieces_offsets; | |
| 419 |
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849 | std::ranges::for_each(this->_readers(), [&] (const PieceReader& reader) { |
| 420 |
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444 | pieces_layouts.push_back(MDLayout{reader.extents()}); |
| 421 |
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444 | pieces_offsets.push_back(MDIndex{reader.location().lower_left}); |
| 422 |
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444 | if (type == ParentType::FieldType::point) |
| 423 | 786 | std::ranges::for_each(pieces_layouts.back(), [] (auto& o) { o += 1; }); | |
| 424 | else | ||
| 425 | 864 | std::ranges::for_each(pieces_layouts.back(), [] (auto& o) { o = std::max(o, std::size_t{1}); }); | |
| 426 | }); | ||
| 427 | |||
| 428 |
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810 | return make_field_ptr(LazyField{ |
| 429 | int{}, // dummy source | ||
| 430 | whole_field_layout, | ||
| 431 | precision, | ||
| 432 |
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2208 | [ |
| 433 | 405 | _whole_ex=std::move(whole_grid_extents), _prec=precision, _field_layout=whole_field_layout, | |
| 434 | 1215 | _pieces=std::move(pieces), _offsets=std::move(pieces_offsets), _piece_layouts=std::move(pieces_layouts) | |
| 435 | ] (const int&) { | ||
| 436 |
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258 | const auto num_entities = _field_layout.extent(0); |
| 437 |
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258 | const auto num_comps = _field_layout.dimension() > 1 ? _field_layout.number_of_entries(1) : 1; |
| 438 |
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258 | const FlatIndexMapper global_mapper{std::array{_whole_ex[1], _whole_ex[3], _whole_ex[5]}}; |
| 439 | 591 | return _prec.visit([&] <typename T> (const Precision<T>& prec) { | |
| 440 |
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258 | Serialization result(num_entities*num_comps*sizeof(T)); |
| 441 |
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258 | auto result_span = result.as_span_of(prec); |
| 442 | |||
| 443 |
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774 | for (unsigned int i = 0; i < _pieces.size(); ++i) { |
| 444 |
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|
516 | auto piece_serialization = _pieces.at(i)->serialized(); |
| 445 |
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|
516 | auto piece_span = piece_serialization.as_span_of(prec); |
| 446 | |||
| 447 | 516 | std::size_t piece_offset = 0; | |
| 448 |
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516 | const auto local_to_global_offset = _offsets.at(i); |
| 449 |
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26436 | for (auto piece_index : MDIndexRange{_piece_layouts.at(i)}) { |
| 450 |
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12960 | piece_index += local_to_global_offset; |
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12960 | const auto global_offset = global_mapper.map(piece_index)*num_comps; |
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12960 | assert(global_offset + num_comps <= result_span.size()); |
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12960 | assert(piece_offset + num_comps <= piece_span.size()); |
| 454 | ✗ | std::copy_n( | |
| 455 |
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|
12960 | piece_span.data() + piece_offset, |
| 456 | num_comps, | ||
| 457 | 12960 | result_span.data() + global_offset | |
| 458 | ); | ||
| 459 | 12960 | piece_offset += num_comps; | |
| 460 | } | ||
| 461 | } | ||
| 462 | 258 | return result; | |
| 463 |
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516 | }); |
| 464 | } | ||
| 465 |
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810 | }); |
| 466 | 405 | } | |
| 467 | |||
| 468 | 405 | void _check_fields_compatibility(const std::vector<FieldPtr>& pieces, | |
| 469 | const MDLayout& whole_field_layout, | ||
| 470 | const DynamicPrecision& precision) const { | ||
| 471 | 849 | const auto has_compatible_layout = [&] (const FieldPtr& piece_field) { | |
| 472 |
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444 | const auto piece_layout = piece_field->layout(); |
| 473 |
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444 | if (piece_layout.dimension() != whole_field_layout.dimension()) |
| 474 | ✗ | return false; | |
| 475 |
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444 | if (whole_field_layout.dimension() > 1) |
| 476 |
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300 | return whole_field_layout.sub_layout(1) == piece_layout.sub_layout(1); |
| 477 | 144 | return true; | |
| 478 | 444 | }; | |
| 479 |
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405 | if (!std::ranges::all_of(pieces, has_compatible_layout)) |
| 480 | ✗ | throw ValueError("Fields to be merged have incompatible layouts"); | |
| 481 | |||
| 482 | 849 | const auto has_compatible_precision = [&] (const FieldPtr& piece_field) { | |
| 483 |
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444 | return piece_field->precision() == precision; |
| 484 | }; | ||
| 485 |
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405 | if (!std::ranges::all_of(pieces, has_compatible_precision)) |
| 486 | ✗ | throw ValueError("Fields to be merged have incompatible precisions"); | |
| 487 | 405 | } | |
| 488 | |||
| 489 | 129 | std::array<std::size_t, 6> _whole_point_extents() const { | |
| 490 | 129 | auto result = _specs().extents; | |
| 491 | 129 | result[1] += 1; | |
| 492 | 129 | result[3] += 1; | |
| 493 | 129 | result[5] += 1; | |
| 494 | 129 | return result; | |
| 495 | } | ||
| 496 | |||
| 497 | std::optional<StructuredGridSpecs> _grid_specs; | ||
| 498 | }; | ||
| 499 | |||
| 500 | } // namespace GridFormat::VTK | ||
| 501 | |||
| 502 | #endif // GRIDFORMAT_VTK_PXML_READER_HPP_ | ||
| 503 |