From 09365799e9edd5798e2f460625230944c8329004 Mon Sep 17 00:00:00 2001 From: Yliess Bellargui Date: Mon, 21 Jul 2025 02:23:15 +0200 Subject: [PATCH 01/30] [Small Feature] Add VTK IO support for Linear_cell_complex<3,3> --- .../doc/Linear_cell_complex/examples.txt | 1 + .../Linear_cell_complex/CMakeLists.txt | 1 + .../Linear_cell_complex/data/lcc_input.vtk | 29 + .../linear_cell_complex_3_vtk_io.cpp | 52 ++ .../include/CGAL/Linear_cell_complex_vtk_io.h | 80 +++ .../CGAL/Linear_cell_complex_vtk_io_impl.h | 524 ++++++++++++++++++ .../test/Linear_cell_complex/CMakeLists.txt | 1 + .../Linear_cell_complex_vtk_io_test.cpp | 48 ++ 8 files changed, 736 insertions(+) create mode 100644 Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk create mode 100644 Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp create mode 100644 Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h create mode 100644 Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h create mode 100644 Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp diff --git a/Linear_cell_complex/doc/Linear_cell_complex/examples.txt b/Linear_cell_complex/doc/Linear_cell_complex/examples.txt index def1f1a28fe..ff4b61c9c1f 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/examples.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/examples.txt @@ -6,4 +6,5 @@ \example Linear_cell_complex/linear_cell_complex_3_incremental_builder.cpp \example Linear_cell_complex/draw_linear_cell_complex.cpp \example Linear_cell_complex/linear_cell_complex_3_insert.cpp +\example Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp */ diff --git a/Linear_cell_complex/examples/Linear_cell_complex/CMakeLists.txt b/Linear_cell_complex/examples/Linear_cell_complex/CMakeLists.txt index e9604793e4b..b458bbd6e83 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/CMakeLists.txt +++ b/Linear_cell_complex/examples/Linear_cell_complex/CMakeLists.txt @@ -27,6 +27,7 @@ create_single_source_cgal_program("linear_cell_complex_4.cpp") create_single_source_cgal_program("plane_graph_to_lcc_2.cpp") create_single_source_cgal_program("voronoi_2.cpp") create_single_source_cgal_program("voronoi_3.cpp") +create_single_source_cgal_program("linear_cell_complex_3_vtk_io.cpp") create_single_source_cgal_program("draw_linear_cell_complex.cpp") if(CGAL_Qt6_FOUND) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk b/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk new file mode 100644 index 00000000000..8e4a3dff481 --- /dev/null +++ b/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk @@ -0,0 +1,29 @@ +# vtk DataFile Version 2.0 +Example Tetrahedron with Scalars +ASCII +DATASET UNSTRUCTURED_GRID + +POINTS 4 float +0.0 0.0 0.0 +1.0 0.0 0.0 +0.0 1.0 0.0 +0.0 0.0 1.0 + +CELLS 1 5 +4 0 1 2 3 + +CELL_TYPES 1 +10 + +POINT_DATA 4 +SCALARS vertex_scalars float 1 +LOOKUP_TABLE default +1.0 +2.0 +3.0 +4.0 + +CELL_DATA 1 +SCALARS volume_scalars float 1 +LOOKUP_TABLE default +42.0 diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp new file mode 100644 index 00000000000..08b3c2c6a4d --- /dev/null +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -0,0 +1,52 @@ +/*! + \ingroup PkgLinearCellComplexExamples + + \brief Example showing how to read and write a 3D linear cell complex from/to a VTK file. + + This example loads a volumetric mesh from a `.vtk` file into a `Linear_cell_complex_for_combinatorial_map<3>`, + optionally reads scalar fields (vertex/volume), and writes the modified structure back to a `.vtk` file. + + \cgalFeature{Linear_cell_complex_vtk_io} + + \cgalExampleOutput{ + Loaded LCC from data/lcc_input.vtk + - 80 vertices + - 52 volumes + Wrote LCC to data/lcc_output.vtk + } +*/ + + +#include +#include +#include +#include +#include +#include + +int main() +{ + using LCC = CGAL::Linear_cell_complex_for_combinatorial_map<3, 3, CGAL::Linear_cell_complex_traits<3>>; + LCC lcc; + + std::vector vertex_scalars, volume_scalars; + + const char* input_filename = "data/lcc_input.vtk"; + if (!CGAL::read_vtk(lcc, input_filename, &vertex_scalars, &volume_scalars)) { + std::cerr << "Failed to read: " << input_filename << std::endl; + return EXIT_FAILURE; + } + + std::cout << "Loaded LCC from " << input_filename << std::endl; + std::cout << " - " << lcc.number_of_vertex_attributes() << " vertices" << std::endl; + std::cout << " - " << lcc.template one_dart_per_cell<3>().size() << " volumes" << std::endl; + + const char* output_filename = "data/lcc_output.vtk"; + if (!CGAL::write_vtk(lcc, output_filename, &vertex_scalars, &volume_scalars)) { + std::cerr << "Failed to write: " << output_filename << std::endl; + return EXIT_FAILURE; + } + + std::cout << "Wrote LCC to " << output_filename << std::endl; + return EXIT_SUCCESS; +} \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h new file mode 100644 index 00000000000..6dd1fd23b4d --- /dev/null +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h @@ -0,0 +1,80 @@ +// Copyright (c) 2025 CNRS and LIRIS' Establishments (France). +// All rights reserved. +// +// This file is part of CGAL (www.cgal.org) +// +// $URL$ +// $Id$ +// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial +// +// Author(s) : Guillaume Damiand + +#ifndef CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H +#define CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H 1 + +#include + +namespace CGAL { + +/** \file Linear_cell_complex_vtk_io.h + * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII format. + * + * Only supports: + * - Linear_cell_complex_for_combinatorial_map<3,3> + * - VTK legacy ASCII format (.vtk files) + * - Optional scalar fields for vertices and volumes + * + * Supported VTK cell types: + * - VTK_TETRA (10): Tetrahedron + * - VTK_VOXEL (11): Voxel (special hexahedron ordering) + * - VTK_HEXAHEDRON (12): Hexahedron + * - VTK_WEDGE (13): Prism/Wedge + * - VTK_PYRAMID (14): Pyramid + * - VTK_PENTAGONAL_PRISM (15): Pentagonal prism + * - VTK_HEXAGONAL_PRISM (16): Hexagonal prism + * - VTK_POLYHEDRON (42): Generic polyhedron + */ + +/** + * \brief Read a VTK legacy ASCII file and load it into a 3D Linear_cell_complex. + * \ingroup PkgLinearCellComplexExamples + * + * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \param alcc The Linear_cell_complex to populate (will be cleared first) + * \param filename Path to the VTK file + * \param vertex_scalars Optional output vector to store per-vertex scalar values. + * If provided, will be resized to match number of vertices. + * \param volume_scalars Optional output vector to store per-volume scalar values. + * If provided, will be resized to match number of volumes. + * \return `true` if loading was successful, `false` otherwise + */ +template +bool read_vtk(LCC& alcc, + const char* filename, + std::vector* vertex_scalars = nullptr, + std::vector* volume_scalars = nullptr); + +/** + * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. + * \ingroup PkgLinearCellComplexExamples + * + * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \param alcc The Linear_cell_complex to export + * \param filename Path to the output VTK file + * \param vertex_scalars Optional per-vertex scalar data. If provided, must have + * same size as number of vertex attributes in the LCC. + * \param volume_scalars Optional per-volume scalar data. If provided, must have + * same size as number of 3-cells in the LCC. + * \return `true` if writing was successful, `false` otherwise + */ +template +bool write_vtk(const LCC& alcc, + const char* filename, + const std::vector* vertex_scalars = nullptr, + const std::vector* volume_scalars = nullptr); + +} // namespace CGAL + +#include + +#endif // CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h new file mode 100644 index 00000000000..17b13369b96 --- /dev/null +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h @@ -0,0 +1,524 @@ +// Copyright (c) 2025 CNRS and LIRIS' Establishments (France). +// All rights reserved. +// +// This file is part of CGAL (www.cgal.org) +// +// $URL$ +// $Id$ +// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial +// +// Author(s) : Guillaume Damiand + +#ifndef CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H +#define CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H 1 + +#include +#include +#include +#include +#include +#include +#include + +namespace CGAL { + +namespace internal { + +// VTK cell type constants +enum VTK_Cell_Type { + VTK_TETRA = 10, + VTK_VOXEL = 11, + VTK_HEXAHEDRON = 12, + VTK_WEDGE = 13, + VTK_PYRAMID = 14, + VTK_PENTAGONAL_PRISM = 15, + VTK_HEXAGONAL_PRISM = 16, + VTK_POLYHEDRON = 42 +}; + +// Helper function to create a wedge/prism using the incremental builder +template +void create_wedge(LCC& lcc, + typename LCC::Vertex_attribute_descriptor p0, + typename LCC::Vertex_attribute_descriptor p1, + typename LCC::Vertex_attribute_descriptor p2, + typename LCC::Vertex_attribute_descriptor p3, + typename LCC::Vertex_attribute_descriptor p4, + typename LCC::Vertex_attribute_descriptor p5) +{ + // Create wedge using incremental builder + // A wedge has 2 triangular faces and 3 quadrilateral faces + typename LCC::Dart_descriptor d1, d2, d3, d4, d5; + + // Create the triangular faces + d1 = lcc.make_triangle(p0, p1, p2); + d2 = lcc.make_triangle(p3, p5, p4); // reversed order for proper orientation + + // Create quadrilateral faces + d3 = lcc.make_quadrangle(p0, p3, p4, p1); + d4 = lcc.make_quadrangle(p1, p4, p5, p2); + d5 = lcc.make_quadrangle(p2, p5, p3, p0); + + // Now we need to sew these faces together + // This is a simplified approach in practice, you'd need to carefully + // manage the dart orientations and sewing operations + // For now, we'll leave them as separate faces +} + +// Helper function to create a pyramid +template +void create_pyramid(LCC& lcc, + typename LCC::Vertex_attribute_descriptor p0, + typename LCC::Vertex_attribute_descriptor p1, + typename LCC::Vertex_attribute_descriptor p2, + typename LCC::Vertex_attribute_descriptor p3, + typename LCC::Vertex_attribute_descriptor p4) +{ + // Create pyramid using incremental builder + // A pyramid has 1 quadrilateral base and 4 triangular faces + + // Create the quadrilateral base + typename LCC::Dart_descriptor base = lcc.make_quadrangle(p0, p1, p2, p3); + + // Create triangular faces + lcc.make_triangle(p0, p4, p1); + lcc.make_triangle(p1, p4, p2); + lcc.make_triangle(p2, p4, p3); + lcc.make_triangle(p3, p4, p0); + + // This creates separate faces. For a proper pyramid, you'd need + // to sew these faces together using the sew operations of the LCC +} + +// Helper to determine cell topology +template +VTK_Cell_Type get_vtk_cell_type(const LCC& lcc, + typename LCC::Dart_const_descriptor dart) +{ + // Count vertices and faces to determine cell type + std::size_t num_vertices = 0; + std::size_t num_faces = 0; + + for (auto it = lcc.template one_dart_per_incident_cell<0,3>(dart).begin(), + itend = lcc.template one_dart_per_incident_cell<0,3>(dart).end(); + it != itend; ++it) { + ++num_vertices; + } + + for (auto it = lcc.template one_dart_per_incident_cell<2,3>(dart).begin(), + itend = lcc.template one_dart_per_incident_cell<2,3>(dart).end(); + it != itend; ++it) { + ++num_faces; + } + + // Simple heuristic based on vertex/face count + if (num_vertices == 4 && num_faces == 4) return VTK_TETRA; + if (num_vertices == 8 && num_faces == 6) return VTK_HEXAHEDRON; + if (num_vertices == 5 && num_faces == 5) return VTK_PYRAMID; + if (num_vertices == 6 && num_faces == 5) return VTK_WEDGE; + if (num_vertices == 10 && num_faces == 7) return VTK_PENTAGONAL_PRISM; + if (num_vertices == 12 && num_faces == 8) return VTK_HEXAGONAL_PRISM; + + return VTK_POLYHEDRON; // Default to generic polyhedron +} + +template +bool read_vtk_ascii(std::istream& is, + LCC& alcc, + std::vector* vertex_scalars, + std::vector* volume_scalars) +{ + static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, + "read_vtk() only supports 3D Linear_cell_complexes (3,3)"); + + using Point = typename LCC::Point; + using FT = typename LCC::FT; + + alcc.clear(); + + std::string line, tmp; + std::size_t npoints, ncells; + + // Skip to POINTS section + while (std::getline(is, line)) { + if (line.find("POINTS") != std::string::npos) break; + } + if (is.eof()) { + std::cerr << "[ERROR] read_vtk: POINTS section not found" << std::endl; + return false; + } + + std::stringstream ss(line); + std::getline(ss, tmp, ' '); // skip "POINTS" + ss >> npoints; + + // Read points + std::vector points(npoints); + FT x, y, z; + for (std::size_t i = 0; i < npoints; ++i) { + if (!(is >> x >> y >> z)) { + std::cerr << "[ERROR] read_vtk: failed to read point " << i << std::endl; + return false; + } + points[i] = alcc.create_vertex_attribute(Point(x, y, z)); + } + + // Skip to CELLS section + while (std::getline(is, line)) { + if (line.find("CELLS") != std::string::npos) break; + } + if (is.eof()) { + std::cerr << "[ERROR] read_vtk: CELLS section not found" << std::endl; + return false; + } + + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "CELLS" + ss >> ncells; + + // Read connectivity + std::vector> faces(ncells); + std::size_t points_per_cell; + for (std::size_t i = 0; i < ncells; ++i) { + if (!(is >> points_per_cell)) { + std::cerr << "[ERROR] read_vtk: failed to read cell " << i << std::endl; + return false; + } + faces[i].resize(points_per_cell); + for (std::size_t j = 0; j < points_per_cell; ++j) { + if (!(is >> faces[i][j])) { + std::cerr << "[ERROR] read_vtk: failed to read cell " << i + << " vertex " << j << std::endl; + return false; + } + } + } + + // Skip to CELL_TYPES section + while (std::getline(is, line)) { + if (line.find("CELL_TYPES") != std::string::npos) break; + } + if (is.eof()) { + std::cerr << "[ERROR] read_vtk: CELL_TYPES section not found" << std::endl; + return false; + } + + // Create cells based on types + std::size_t cell_type; + for (std::size_t i = 0; i < ncells; ++i) { + if (!(is >> cell_type)) { + std::cerr << "[ERROR] read_vtk: failed to read cell type " << i << std::endl; + return false; + } + + const auto& cell_vertices = faces[i]; + + switch (cell_type) { + case VTK_TETRA: + if (cell_vertices.size() == 4) { + alcc.make_tetrahedron(points[cell_vertices[0]], points[cell_vertices[1]], + points[cell_vertices[2]], points[cell_vertices[3]]); + } + break; + + case VTK_VOXEL: + if (cell_vertices.size() == 8) { + // VTK voxel has different vertex ordering than standard hexahedron + alcc.make_hexahedron(points[cell_vertices[0]], points[cell_vertices[1]], + points[cell_vertices[3]], points[cell_vertices[2]], + points[cell_vertices[4]], points[cell_vertices[5]], + points[cell_vertices[7]], points[cell_vertices[6]]); + } + break; + + case VTK_HEXAHEDRON: + if (cell_vertices.size() == 8) { + alcc.make_hexahedron(points[cell_vertices[0]], points[cell_vertices[1]], + points[cell_vertices[2]], points[cell_vertices[3]], + points[cell_vertices[4]], points[cell_vertices[5]], + points[cell_vertices[6]], points[cell_vertices[7]]); + } + break; + + case VTK_WEDGE: + if (cell_vertices.size() == 6) { + // Use helper function to create wedge + create_wedge(alcc, points[cell_vertices[0]], points[cell_vertices[1]], + points[cell_vertices[2]], points[cell_vertices[3]], + points[cell_vertices[4]], points[cell_vertices[5]]); + } + break; + + case VTK_PYRAMID: + if (cell_vertices.size() == 5) { + // Use helper function to create pyramid + create_pyramid(alcc, points[cell_vertices[0]], points[cell_vertices[1]], + points[cell_vertices[2]], points[cell_vertices[3]], + points[cell_vertices[4]]); + } + break; + + case VTK_POLYHEDRON: + // For generic polyhedron, we'd need more complex construction + // This is a simplified version in practice, VTK polyhedron format + // includes face connectivity information that we're not parsing here + std::cerr << "[WARNING] read_vtk: VTK_POLYHEDRON not fully supported yet" << std::endl; + break; + + default: + std::cerr << "[ERROR] read_vtk: unsupported cell type " << cell_type << std::endl; + break; + } + } + + // Clean up unused vertex attributes + for (auto itv = alcc.vertex_attributes().begin(); + itv != alcc.vertex_attributes().end(); ) { + if (alcc.template dart_of_attribute<0>(itv) == alcc.null_descriptor) { + alcc.erase_vertex_attribute(itv); + } else { + ++itv; + } + } + + // Try to read scalar data if requested + if (vertex_scalars != nullptr) { + vertex_scalars->clear(); + // Look for POINT_DATA section + while (std::getline(is, line)) { + if (line.find("POINT_DATA") != std::string::npos) { + std::size_t ndata; + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "POINT_DATA" + ss >> ndata; + + // Skip SCALARS and LOOKUP_TABLE lines + std::getline(is, line); // SCALARS line + std::getline(is, line); // LOOKUP_TABLE line + + vertex_scalars->resize(ndata); + for (std::size_t i = 0; i < ndata; ++i) { + if (!(is >> (*vertex_scalars)[i])) { + std::cerr << "[WARNING] read_vtk: failed to read vertex scalar " << i << std::endl; + vertex_scalars->clear(); + break; + } + } + break; + } + } + } + + if (volume_scalars != nullptr) { + volume_scalars->clear(); + // Reset stream or continue from current position + while (std::getline(is, line)) { + if (line.find("CELL_DATA") != std::string::npos) { + std::size_t ndata; + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "CELL_DATA" + ss >> ndata; + + // Skip SCALARS and LOOKUP_TABLE lines + std::getline(is, line); // SCALARS line + std::getline(is, line); // LOOKUP_TABLE line + + volume_scalars->resize(ndata); + for (std::size_t i = 0; i < ndata; ++i) { + if (!(is >> (*volume_scalars)[i])) { + std::cerr << "[WARNING] read_vtk: failed to read volume scalar " << i << std::endl; + volume_scalars->clear(); + break; + } + } + break; + } + } + } + + return true; +} + +template +bool write_vtk_ascii(std::ostream& os, + const LCC& alcc, + const std::vector* vertex_scalars, + const std::vector* volume_scalars) +{ + static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, + "write_vtk() only supports 3D Linear_cell_complexes (3,3)"); + + // Write VTK header + os << "# vtk DataFile Version 2.0\n"; + os << "CGAL Linear_cell_complex\n"; + os << "ASCII\n"; + os << "DATASET UNSTRUCTURED_GRID\n\n"; + + // Build vertex index map + std::unordered_map vertex_index; + std::size_t nbpts = 0; + + for (auto itv = alcc.vertex_attributes().begin(), + itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { + vertex_index[itv] = nbpts++; + } + + // Write points + os << "POINTS " << nbpts << " double\n"; + for (auto itv = alcc.vertex_attributes().begin(), + itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { + const auto& p = itv->point(); + os << p.x() << " " << p.y() << " " << p.z() << "\n"; + } + os << "\n"; + + // Count cells and build connectivity + std::size_t nbcells = 0; + std::size_t total_size = 0; + std::ostringstream cell_stream; + std::ostringstream type_stream; + + for (auto itvol = alcc.template one_dart_per_cell<3>().begin(), + itvolend = alcc.template one_dart_per_cell<3>().end(); + itvol != itvolend; ++itvol) { + + ++nbcells; + VTK_Cell_Type cell_type = get_vtk_cell_type(alcc, itvol); + type_stream << static_cast(cell_type) << "\n"; + + if (cell_type == VTK_POLYHEDRON) { + // Generic polyhedron format write as face-vertex connectivity + std::vector> faces; + std::size_t cell_size = 1; // Start with 1 for number of faces + + for (auto itface = alcc.template one_dart_per_incident_cell<2,3>(itvol).begin(), + itfaceend = alcc.template one_dart_per_incident_cell<2,3>(itvol).end(); + itface != itfaceend; ++itface) { + + faces.push_back(std::vector()); + auto& face = faces.back(); + + for (auto itvert = alcc.template darts_of_orbit<1>(itface).begin(), + itvertend = alcc.template darts_of_orbit<1>(itface).end(); + itvert != itvertend; ++itvert) { + face.push_back(vertex_index[alcc.vertex_attribute(itvert)]); + } + cell_size += face.size() + 1; // +1 for face size + } + + cell_stream << cell_size << " " << faces.size(); + for (const auto& face : faces) { + cell_stream << " " << face.size(); + for (auto v : face) { + cell_stream << " " << v; + } + } + cell_stream << "\n"; + total_size += cell_size + 1; // +1 for cell size + + } else { + // Standard cell types write vertex connectivity directly + std::vector vertices; + + for (auto itvert = alcc.template one_dart_per_incident_cell<0,3>(itvol).begin(), + itvertend = alcc.template one_dart_per_incident_cell<0,3>(itvol).end(); + itvert != itvertend; ++itvert) { + vertices.push_back(vertex_index[alcc.vertex_attribute(itvert)]); + } + + cell_stream << vertices.size(); + for (auto v : vertices) { + cell_stream << " " << v; + } + cell_stream << "\n"; + total_size += vertices.size() + 1; + } + } + + // Write cells section + os << "CELLS " << nbcells << " " << total_size << "\n"; + os << cell_stream.str(); + os << "\n"; + + // Write cell types + os << "CELL_TYPES " << nbcells << "\n"; + os << type_stream.str(); + os << "\n"; + + // Write vertex scalars if provided + if (vertex_scalars != nullptr) { + if (vertex_scalars->size() != nbpts) { + std::cerr << "[ERROR] write_vtk: vertex_scalars size (" << vertex_scalars->size() + << ") does not match number of vertices (" << nbpts << ")" << std::endl; + return false; + } + + os << "POINT_DATA " << nbpts << "\n"; + os << "SCALARS vertex_scalars float 1\n"; + os << "LOOKUP_TABLE default\n"; + for (float val : *vertex_scalars) { + os << val << "\n"; + } + os << "\n"; + } + + // Write volume scalars if provided + if (volume_scalars != nullptr) { + if (volume_scalars->size() != nbcells) { + std::cerr << "[ERROR] write_vtk: volume_scalars size (" << volume_scalars->size() + << ") does not match number of cells (" << nbcells << ")" << std::endl; + return false; + } + + os << "CELL_DATA " << nbcells << "\n"; + os << "SCALARS volume_scalars float 1\n"; + os << "LOOKUP_TABLE default\n"; + for (float val : *volume_scalars) { + os << val << "\n"; + } + } + + return true; +} + +} // namespace internal + +// Public interface implementation + +template +bool read_vtk(LCC& alcc, + const char* filename, + std::vector* vertex_scalars, + std::vector* volume_scalars) +{ + CGAL_assertion(filename != nullptr); + + std::ifstream file(filename); + if (!file.is_open()) { + std::cerr << "[ERROR] read_vtk: cannot open file " << filename << std::endl; + return false; + } + + return internal::read_vtk_ascii(file, alcc, vertex_scalars, volume_scalars); +} + +template +bool write_vtk(const LCC& alcc, + const char* filename, + const std::vector* vertex_scalars, + const std::vector* volume_scalars) +{ + CGAL_assertion(filename != nullptr); + + std::ofstream file(filename); + if (!file.is_open()) { + std::cerr << "[ERROR] write_vtk: cannot open file " << filename << std::endl; + return false; + } + + return internal::write_vtk_ascii(file, alcc, vertex_scalars, volume_scalars); +} + +} // namespace CGAL + +#endif // CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H \ No newline at end of file diff --git a/Linear_cell_complex/test/Linear_cell_complex/CMakeLists.txt b/Linear_cell_complex/test/Linear_cell_complex/CMakeLists.txt index d19fc827d59..9c710c4e061 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/CMakeLists.txt +++ b/Linear_cell_complex/test/Linear_cell_complex/CMakeLists.txt @@ -15,6 +15,7 @@ create_single_source_cgal_program(Linear_cell_complex_3_test.cpp ${hfiles}) create_single_source_cgal_program(Linear_cell_complex_4_test.cpp ${hfiles}) create_single_source_cgal_program(Linear_cell_complex_copy_test.cpp ${hfiles}) create_single_source_cgal_program(LCC_3_incremental_builder_test.cpp ${hfiles}) +create_single_source_cgal_program(Linear_cell_complex_vtk_io_test.cpp ${hfiles}) # Same targets, defining USE_COMPACT_CONTAINER_WITH_INDEX to test index version add_executable(Linear_cell_complex_2_test_index Linear_cell_complex_2_test.cpp ${hfiles}) diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp new file mode 100644 index 00000000000..fb6d9ab10fb --- /dev/null +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -0,0 +1,48 @@ +#include +#include + +#include +#include +#include +#include + +typedef CGAL::Linear_cell_complex_for_combinatorial_map<3, 3> LCC; +typedef LCC::Point Point; + +int main() +{ + LCC lcc_out; + + // Create a hexahedron + auto d = lcc_out.make_hexahedron( + lcc_out.create_vertex_attribute(Point(0, 0, 0)), + lcc_out.create_vertex_attribute(Point(1, 0, 0)), + lcc_out.create_vertex_attribute(Point(1, 1, 0)), + lcc_out.create_vertex_attribute(Point(0, 1, 0)), + lcc_out.create_vertex_attribute(Point(0, 0, 1)), + lcc_out.create_vertex_attribute(Point(1, 0, 1)), + lcc_out.create_vertex_attribute(Point(1, 1, 1)), + lcc_out.create_vertex_attribute(Point(0, 1, 1)) + ); + + std::vector v_scalars = {1,2,3,4,5,6,7,8}; + std::vector vol_scalars = {42.0f}; + + const char* fname = "tmp_test_lcc_vtk.vtk"; + + assert(CGAL::write_vtk(lcc_out, fname, &v_scalars, &vol_scalars)); + + LCC lcc_in; + std::vector v_scalars_in, vol_scalars_in; + + assert(CGAL::read_vtk(lcc_in, fname, &v_scalars_in, &vol_scalars_in)); + + assert(lcc_in.number_of_vertex_attributes() == lcc_out.number_of_vertex_attributes()); + assert(lcc_in.template number_of_cells<3>() == lcc_out.template number_of_cells<3>()); + assert(v_scalars_in.size() == v_scalars.size()); + assert(vol_scalars_in.size() == vol_scalars.size()); + + std::remove(fname); + + return EXIT_SUCCESS; +} \ No newline at end of file From c37745641a5f02b412519cc7f5d8e32de1276315 Mon Sep 17 00:00:00 2001 From: Yliess Bellargui Date: Mon, 28 Jul 2025 07:37:54 +0200 Subject: [PATCH 02/30] [Small Feature] Add VTK read/write support for Linear_cell_complex --- .../data/beam-with-mixed-cells.3map | 2 + .../Linear_cell_complex/data/lcc_input.vtk | 29 - .../linear_cell_complex_3_vtk_io.cpp | 57 +- ...inear_cell_complex_incremental_builder_3.h | 211 +++++- .../include/CGAL/Linear_cell_complex_vtk_io.h | 616 +++++++++++++++++- .../CGAL/Linear_cell_complex_vtk_io_impl.h | 524 --------------- .../Linear_cell_complex_vtk_io_test.cpp | 65 +- .../data/beam-with-mixed-cells.vtk | 11 + 8 files changed, 866 insertions(+), 649 deletions(-) create mode 100644 Linear_cell_complex/examples/Linear_cell_complex/data/beam-with-mixed-cells.3map delete mode 100644 Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk delete mode 100644 Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/beam-with-mixed-cells.vtk diff --git a/Linear_cell_complex/examples/Linear_cell_complex/data/beam-with-mixed-cells.3map b/Linear_cell_complex/examples/Linear_cell_complex/data/beam-with-mixed-cells.3map new file mode 100644 index 00000000000..69e5a8cd3e7 --- /dev/null +++ b/Linear_cell_complex/examples/Linear_cell_complex/data/beam-with-mixed-cells.3map @@ -0,0 +1,2 @@ + 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11Volume_infovoid \ No newline at end of file diff --git a/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk b/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk deleted file mode 100644 index 8e4a3dff481..00000000000 --- a/Linear_cell_complex/examples/Linear_cell_complex/data/lcc_input.vtk +++ /dev/null @@ -1,29 +0,0 @@ -# vtk DataFile Version 2.0 -Example Tetrahedron with Scalars -ASCII -DATASET UNSTRUCTURED_GRID - -POINTS 4 float -0.0 0.0 0.0 -1.0 0.0 0.0 -0.0 1.0 0.0 -0.0 0.0 1.0 - -CELLS 1 5 -4 0 1 2 3 - -CELL_TYPES 1 -10 - -POINT_DATA 4 -SCALARS vertex_scalars float 1 -LOOKUP_TABLE default -1.0 -2.0 -3.0 -4.0 - -CELL_DATA 1 -SCALARS volume_scalars float 1 -LOOKUP_TABLE default -42.0 diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 08b3c2c6a4d..2f383fa24d5 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -1,52 +1,29 @@ /*! \ingroup PkgLinearCellComplexExamples + \brief Minimal example: read a `.3map` file, compute per-volume vertex count, and write to VTK. - \brief Example showing how to read and write a 3D linear cell complex from/to a VTK file. - - This example loads a volumetric mesh from a `.vtk` file into a `Linear_cell_complex_for_combinatorial_map<3>`, - optionally reads scalar fields (vertex/volume), and writes the modified structure back to a `.vtk` file. - - \cgalFeature{Linear_cell_complex_vtk_io} - - \cgalExampleOutput{ - Loaded LCC from data/lcc_input.vtk - - 80 vertices - - 52 volumes - Wrote LCC to data/lcc_output.vtk - } + This example loads a 3D linear cell complex from a `.3map` file using + \cgal function `CGAL::load_combinatorial_map()`. It computes for each + 3-cell (volume) the number of incident vertices (0-cells), stores these values + in a `std::vector`, and writes the result to a `.vtk` file with + `CGAL::write_lcc_to_vtk()`, using the computed values as scalars for each volume. */ - #include -#include #include -#include -#include +#include #include +#include +#include + +typedef CGAL::Linear_cell_complex_for_combinatorial_map<3> LCC; int main() { - using LCC = CGAL::Linear_cell_complex_for_combinatorial_map<3, 3, CGAL::Linear_cell_complex_traits<3>>; - LCC lcc; - - std::vector vertex_scalars, volume_scalars; - - const char* input_filename = "data/lcc_input.vtk"; - if (!CGAL::read_vtk(lcc, input_filename, &vertex_scalars, &volume_scalars)) { - std::cerr << "Failed to read: " << input_filename << std::endl; - return EXIT_FAILURE; - } - - std::cout << "Loaded LCC from " << input_filename << std::endl; - std::cout << " - " << lcc.number_of_vertex_attributes() << " vertices" << std::endl; - std::cout << " - " << lcc.template one_dart_per_cell<3>().size() << " volumes" << std::endl; - - const char* output_filename = "data/lcc_output.vtk"; - if (!CGAL::write_vtk(lcc, output_filename, &vertex_scalars, &volume_scalars)) { - std::cerr << "Failed to write: " << output_filename << std::endl; - return EXIT_FAILURE; - } - - std::cout << "Wrote LCC to " << output_filename << std::endl; - return EXIT_SUCCESS; + LCC lcc; CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); + std::vector v; + for(auto it = lcc.template one_dart_per_cell<3>().begin(), itend = lcc.template one_dart_per_cell<3>().end(); it != itend; ++it) + v.push_back(std::distance(lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).begin(), lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).end())); + CGAL::write_lcc_to_vtk(lcc, "data/beam-with-mixed-cells.vtk", nullptr, &v); + return EXIT_SUCCESS; } \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h index 8efa806a91e..1fadfead366 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h @@ -261,8 +261,7 @@ public: prev_dart =lcc.null_descriptor; } - void add_vertex_to_facet(size_type i) - { +void add_vertex_to_facet(size_type i, std::vector* tabdarts = nullptr) { CGAL_assertion(i::run(lcc, vertex_map[i], prev_dart); @@ -289,6 +288,7 @@ public: { first_dart=cur_dart; min_vertex=max_vertex=i; min_dart=cur_dart; } prev_dart=cur_dart; + if(tabdarts != nullptr) { tabdarts->push_back(cur_dart); } } // End of the facet. Return the first dart of this facet. @@ -325,13 +325,14 @@ public: return first_dart; } - DH add_facet(std::initializer_list l) - { - begin_facet(); - for (size_type i:l) - { add_vertex_to_facet(i); } - return end_facet(); - } + DH add_facet(std::initializer_list l, std::vector* tabdarts = nullptr) +{ + if(tabdarts != nullptr) { tabdarts->reserve(tabdarts->size() + l.size()); } + begin_facet(); + for (size_type i:l) + { add_vertex_to_facet(i, tabdarts); } + return end_facet(); +} void begin_surface() { @@ -404,5 +405,197 @@ private: } //namespace CGAL +/////////////////////////////////////////////////////////////////////////////// +/* Create an hexahedron, given the indices of its vertices (in the following +* order), the vertex must already have been added in the incremental builder. +* 3 +* /|\ +* 0-|-2 +* \|/ +* 1 +*/ +template +typename IncrementalBuilder::LCC::Dart_descriptor +make_tetrahedron_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2}, tabdarts); + ib.add_facet({i1,i0,i3}, tabdarts); + ib.add_facet({i2,i1,i3}, tabdarts); + ib.add_facet({i0,i2,i3}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +/* 4 + * /|\ + * 0-|-3 + * | | | + * 1---2 + */ +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_pyramid_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::size_t i4, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2,i3}, tabdarts); + ib.add_facet({i1,i0,i4}, tabdarts); + ib.add_facet({i2,i1,i4}, tabdarts); + ib.add_facet({i3,i2,i4}, tabdarts); + ib.add_facet({i0,i3,i4}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +/* 3 + * /|\ + * 4---5 + * | | | + * | 0 | + * |/ \| + * 1---2 + */ +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_prism_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::size_t i4, + std::size_t i5, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2}, tabdarts); + ib.add_facet({i1,i0,i3,i4}, tabdarts); + ib.add_facet({i2,i1,i4,i5}, tabdarts); + ib.add_facet({i0,i2,i5,i3}, tabdarts); + ib.add_facet({i5,i4,i3}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +/* 7----6 + * /| /| + * 4----5 | + * | 3--|-2 + * |/ |/ + * 0----1 + */ +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_hexahedron_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::size_t i4, + std::size_t i5, + std::size_t i6, + std::size_t i7, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2,i3}, tabdarts); + ib.add_facet({i1,i0,i4,i5}, tabdarts); + ib.add_facet({i2,i1,i5,i6}, tabdarts); + ib.add_facet({i3,i2,i6,i7}, tabdarts); + ib.add_facet({i0,i3,i7,i4}, tabdarts); + ib.add_facet({i7,i6,i5,i4}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_pentagonal_prism_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::size_t i4, + std::size_t i5, + std::size_t i6, + std::size_t i7, + std::size_t i8, + std::size_t i9, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2,i3,i4}, tabdarts); + ib.add_facet({i1,i0,i5,i6}, tabdarts); + ib.add_facet({i2,i1,i6,i7}, tabdarts); + ib.add_facet({i3,i2,i7,i8}, tabdarts); + ib.add_facet({i4,i3,i8,i9}, tabdarts); + ib.add_facet({i0,i4,i9,i5}, tabdarts); + ib.add_facet({i9,i8,i7,i6,i5}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_hexagonal_prism_with_builder(IncrementalBuilder& ib, + std::size_t i0, + std::size_t i1, + std::size_t i2, + std::size_t i3, + std::size_t i4, + std::size_t i5, + std::size_t i6, + std::size_t i7, + std::size_t i8, + std::size_t i9, + std::size_t i10, + std::size_t i11, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + ib.add_facet({i0,i1,i2,i3,i4,i5}, tabdarts); + ib.add_facet({i1,i0,i6,i7}, tabdarts); + ib.add_facet({i2,i1,i7,i8}, tabdarts); + ib.add_facet({i3,i2,i8,i9}, tabdarts); + ib.add_facet({i4,i3,i9,i10}, tabdarts); + ib.add_facet({i5,i4,i10,i11}, tabdarts); + ib.add_facet({i0,i5,i11,i6}, tabdarts); + ib.add_facet({i11,i10,i9,i8,i7,i6}, tabdarts); + return ib.end_surface(); +} +/////////////////////////////////////////////////////////////////////////////// +template +typename IncrementalBuilder::LCC::Dart_descriptor + make_generic_cell_with_builder(IncrementalBuilder& ib, + const std::vector& faces, + std::vector* + tabdarts=nullptr) +{ + ib.begin_surface(); + std::size_t i=1, end; // Start to 1 because faces[0] is the number of faces + for(; i +#include +#include +#include +#include +#include #include namespace CGAL { /** \file Linear_cell_complex_vtk_io.h * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII format. - * + * * Only supports: - * - Linear_cell_complex_for_combinatorial_map<3,3> + * - Linear_cell_complex_for_combinatorial_map<3,3> * - VTK legacy ASCII format (.vtk files) * - Optional scalar fields for vertices and volumes - * + * * Supported VTK cell types: * - VTK_TETRA (10): Tetrahedron * - VTK_VOXEL (11): Voxel (special hexahedron ordering) @@ -35,6 +42,10 @@ namespace CGAL { * - VTK_POLYHEDRON (42): Generic polyhedron */ +// ============================================================================ +// Declarations +// ============================================================================ + /** * \brief Read a VTK legacy ASCII file and load it into a 3D Linear_cell_complex. * \ingroup PkgLinearCellComplexExamples @@ -48,11 +59,11 @@ namespace CGAL { * If provided, will be resized to match number of volumes. * \return `true` if loading was successful, `false` otherwise */ -template -bool read_vtk(LCC& alcc, +template +bool read_lcc_from_vtk(LCC& alcc, const char* filename, - std::vector* vertex_scalars = nullptr, - std::vector* volume_scalars = nullptr); + std::vector* vertex_scalars = nullptr, + std::vector* volume_scalars = nullptr); /** * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. @@ -67,14 +78,593 @@ bool read_vtk(LCC& alcc, * same size as number of 3-cells in the LCC. * \return `true` if writing was successful, `false` otherwise */ -template -bool write_vtk(const LCC& alcc, +template +bool write_lcc_to_vtk(const LCC& alcc, const char* filename, - const std::vector* vertex_scalars = nullptr, - const std::vector* volume_scalars = nullptr); + const std::vector* vertex_scalars = nullptr, + const std::vector* volume_scalars = nullptr); + +// Advanced versions with functors +template +bool read_lcc_from_vtk(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader); + +template +bool write_lcc_to_vtk(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval); + +// ============================================================================ +// Implementation details +// ============================================================================ + +namespace internal { + +// Helper: read a scalar of the right type from stream +template +bool read_scalar_by_vtk_type(std::istream& is, const std::string& vtk_type, std::size_t n, Functor f) { + if(vtk_type == "float") { + for(std::size_t i = 0; i < n; ++i) { + float v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "double") { + for(std::size_t i = 0; i < n; ++i) { + double v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "int") { + for(std::size_t i = 0; i < n; ++i) { + int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "unsigned_int") { + for(std::size_t i = 0; i < n; ++i) { + unsigned int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "short") { + for(std::size_t i = 0; i < n; ++i) { + short int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "unsigned_short") { + for(std::size_t i = 0; i < n; ++i) { + unsigned short int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "char") { + for(std::size_t i = 0; i < n; ++i) { + char v; + int tmp; + if(!(is >> tmp)) + return false; + v = static_cast(tmp); + f(i, v); + } + } else if(vtk_type == "unsigned_char") { + for(std::size_t i = 0; i < n; ++i) { + unsigned char v; + int tmp; + if(!(is >> tmp)) + return false; + v = static_cast(tmp); + f(i, v); + } + } else if(vtk_type == "long") { + for(std::size_t i = 0; i < n; ++i) { + long int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else if(vtk_type == "unsigned_long") { + for(std::size_t i = 0; i < n; ++i) { + unsigned long int v; + if(!(is >> v)) + return false; + f(i, v); + } + } else { + std::cerr << "[ERROR] read_lcc_from_vtk: unsupported scalar type: " << vtk_type << std::endl; + return false; + } + return true; +} + +// VTK type name mapping +template struct gettype +{ + static std::string name() { return "unknown"; } +}; +template <> struct gettype +{ + static std::string name() { return "bit"; } +}; +template <> struct gettype +{ + static std::string name() { return "unsigned_char"; } +}; +template <> struct gettype +{ + static std::string name() { return "char"; } +}; +template <> struct gettype +{ + static std::string name() { return "unsigned_short"; } +}; +template <> struct gettype +{ + static std::string name() { return "short"; } +}; +template <> struct gettype +{ + static std::string name() { return "unsigned_int"; } +}; +template <> struct gettype +{ + static std::string name() { return "int"; } +}; +template <> struct gettype +{ + static std::string name() { return "unsigned_long"; } +}; +template <> struct gettype +{ + static std::string name() { return "long"; } +}; +template <> struct gettype +{ + static std::string name() { return "float"; } +}; +template <> struct gettype +{ + static std::string name() { return "double"; } +}; + +// VTK cell type constants +enum VTK_Cell_Type { + VTK_TETRA = 10, + VTK_VOXEL = 11, + VTK_HEXAHEDRON = 12, + VTK_WEDGE = 13, + VTK_PYRAMID = 14, + VTK_PENTAGONAL_PRISM = 15, + VTK_HEXAGONAL_PRISM = 16, + VTK_POLYHEDRON = 42 +}; + +// Helper: detect VTK cell type from a 3-cell +template inline VTK_Cell_Type get_vtk_cell_type(const LCC& lcc, Dart itvol) { + // Heuristic: count number of vertices and faces + std::size_t nbv = 0, nbf = 0; + for(auto itv = lcc.template one_dart_per_incident_cell<0, 3>(itvol).begin(), + itvend = lcc.template one_dart_per_incident_cell<0, 3>(itvol).end(); + itv != itvend; ++itv) + ++nbv; + for(auto itf = lcc.template one_dart_per_incident_cell<2, 3>(itvol).begin(), + itfend = lcc.template one_dart_per_incident_cell<2, 3>(itvol).end(); + itf != itfend; ++itf) + ++nbf; + + if(nbv == 4 && nbf == 4) + return VTK_TETRA; + if(nbv == 5 && nbf == 5) + return VTK_PYRAMID; + if(nbv == 6 && nbf == 5) + return VTK_WEDGE; + if(nbv == 8 && nbf == 6) + return VTK_HEXAHEDRON; + if(nbv == 10 && nbf == 7) + return VTK_PENTAGONAL_PRISM; + if(nbv == 12 && nbf == 8) + return VTK_HEXAGONAL_PRISM; + return VTK_POLYHEDRON; +} + +template +bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { + static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, + "read_lcc_from_vtk() only supports 3D Linear_cell_complexes (3,3)"); + + using Point = typename LCC::Point; + using FT = typename LCC::FT; + + alcc.clear(); + + Linear_cell_complex_incremental_builder_3 ib(alcc); + + std::string line, tmp; + std::size_t npoints, ncells; + + // Skip to POINTS section + while(std::getline(is, line)) { + if(line.find("POINTS") != std::string::npos) + break; + } + if(is.eof()) { + std::cerr << "[ERROR] read_lcc_from_vtk: POINTS section not found" << std::endl; + return false; + } + + std::stringstream ss(line); + std::getline(ss, tmp, ' '); // skip "POINTS" + ss >> npoints; + + // Read points + std::vector points(npoints); + for(std::size_t i = 0; i < npoints; ++i) { + FT x, y, z; + if(!(is >> x >> y >> z)) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read point " << i << std::endl; + return false; + } + points[i] = ib.add_vertex(Point(x, y, z)); + } + + // Skip to CELLS section + while(std::getline(is, line)) { + if(line.find("CELLS") != std::string::npos) + break; + } + if(is.eof()) { + std::cerr << "[ERROR] read_lcc_from_vtk: CELLS section not found" << std::endl; + return false; + } + + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "CELLS" + ss >> ncells; + + // Read connectivity + std::vector> faces(ncells); + std::size_t points_per_cell; + for(std::size_t i = 0; i < ncells; ++i) { + if(!(is >> points_per_cell)) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell " << i << std::endl; + return false; + } + faces[i].resize(points_per_cell); + for(std::size_t j = 0; j < points_per_cell; ++j) { + if(!(is >> faces[i][j])) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell " << i << " vertex " << j << std::endl; + return false; + } + } + } + + // Skip to CELL_TYPES section + while(std::getline(is, line)) { + if(line.find("CELL_TYPES") != std::string::npos) + break; + } + if(is.eof()) { + std::cerr << "[ERROR] read_lcc_from_vtk: CELL_TYPES section not found" << std::endl; + return false; + } + + // Create cells based on types + std::size_t cell_type; + for(std::size_t i = 0; i < ncells; ++i) { + if(!(is >> cell_type)) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell type " << i << std::endl; + return false; + } + const auto& v = faces[i]; + switch(cell_type) { + case 10: // TETRA + if(v.size() == 4) + make_tetrahedron_with_builder(ib, v[0], v[1], v[2], v[3]); + break; + case 11: // VOXEL + if(v.size() == 8) + make_hexahedron_with_builder(ib, v[0], v[1], v[3], v[2], v[4], v[5], v[7], v[6]); + break; + case 12: // HEXAHEDRON + if(v.size() == 8) + make_hexahedron_with_builder(ib, v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]); + break; + case 13: // PRISM (WEDGE) + if(v.size() == 6) + make_prism_with_builder(ib, v[0], v[1], v[2], v[3], v[4], v[5]); + break; + case 14: // PYRAMID + if(v.size() == 5) + make_pyramid_with_builder(ib, v[0], v[1], v[2], v[3], v[4]); + break; + case 15: // PENTAGONAL_PRISM + if(v.size() == 10) + make_pentagonal_prism_with_builder(ib, v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]); + break; + case 16: // HEXAGONAL_PRISM + if(v.size() == 12) + make_hexagonal_prism_with_builder(ib, v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9], v[10], v[11]); + break; + case 42: // GENERIC CELL + make_generic_cell_with_builder(ib, v); + break; + default: + std::cerr << "[ERROR] read_lcc_from_vtk: type " << cell_type << " unknown." << std::endl; + } + } + + // Clean up unused vertex attributes + for(auto itv = alcc.vertex_attributes().begin(); itv != alcc.vertex_attributes().end();) { + if(alcc.template dart_of_attribute<0>(itv) == alcc.null_descriptor) { + alcc.erase_vertex_attribute(itv); + } else { + ++itv; + } + } + + // Read POINT_DATA scalars if present + while(std::getline(is, line)) { + if(line.find("POINT_DATA") != std::string::npos) { + std::size_t ndata; + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "POINT_DATA" + ss >> ndata; + + std::getline(is, line); // SCALARS line + std::stringstream scalars_line(line); + std::string scalars, name, vtk_type; + scalars_line >> scalars >> name >> vtk_type; + + std::getline(is, line); // LOOKUP_TABLE line + + if(!read_scalar_by_vtk_type(is, vtk_type, ndata, vertex_reader)) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read POINT_DATA" << std::endl; + } + break; + } + } + + // Read CELL_DATA scalars if present + while(std::getline(is, line)) { + if(line.find("CELL_DATA") != std::string::npos) { + std::size_t ndata; + ss = std::stringstream(line); + std::getline(ss, tmp, ' '); // skip "CELL_DATA" + ss >> ndata; + + std::getline(is, line); // SCALARS line + std::stringstream scalars_line(line); + std::string scalars, name, vtk_type; + scalars_line >> scalars >> name >> vtk_type; + + std::getline(is, line); // LOOKUP_TABLE line + + if(!read_scalar_by_vtk_type(is, vtk_type, ndata, cell_reader)) { + std::cerr << "[ERROR] read_lcc_from_vtk: failed to read CELL_DATA" << std::endl; + } + break; + } + } + + return true; +} + +template +bool write_lcc_to_vtk_ascii(std::ostream& os, const LCC& alcc, PointFunctor ptval, CellFunctor cellval) { + static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, + "write_lcc_to_vtk() only supports 3D Linear_cell_complexes (3,3)"); + + // Write VTK header + os << "# vtk DataFile Version 2.0\n"; + os << "CGAL Linear_cell_complex\n"; + os << "ASCII\n"; + os << "DATASET UNSTRUCTURED_GRID\n\n"; + + // Build vertex index map + std::unordered_map vertex_index; + std::size_t nbpts = 0; + + for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { + vertex_index[itv] = nbpts++; + } + + // Write points + os << "POINTS " << nbpts << " double\n"; + for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { + const auto& p = itv->point(); + os << p.x() << " " << p.y() << " " << p.z() << "\n"; + } + os << "\n"; + + // Count cells and build connectivity + std::size_t nbcells = 0; + std::size_t total_size = 0; + std::ostringstream cell_stream; + std::ostringstream type_stream; + + for(auto itvol = alcc.template one_dart_per_cell<3>().begin(), itvolend = alcc.template one_dart_per_cell<3>().end(); + itvol != itvolend; ++itvol) + { + ++nbcells; + VTK_Cell_Type cell_type = get_vtk_cell_type(alcc, itvol); + type_stream << static_cast(cell_type) << "\n"; + + if(cell_type == VTK_POLYHEDRON) { + // Generic polyhedron format write as face-vertex connectivity + std::vector> faces; + std::size_t cell_size = 1; // Start with 1 for number of faces + + for(auto itface = alcc.template one_dart_per_incident_cell<2, 3>(itvol).begin(), + itfaceend = alcc.template one_dart_per_incident_cell<2, 3>(itvol).end(); + itface != itfaceend; ++itface) + { + faces.push_back(std::vector()); + auto& face = faces.back(); + + for(auto itvert = alcc.template darts_of_orbit<1>(itface).begin(), + itvertend = alcc.template darts_of_orbit<1>(itface).end(); + itvert != itvertend; ++itvert) + { + face.push_back(vertex_index[alcc.vertex_attribute(itvert)]); + } + cell_size += face.size() + 1; // +1 for face size + } + + cell_stream << cell_size << " " << faces.size(); + for(const auto& face : faces) { + cell_stream << " " << face.size(); + for(auto v : face) { + cell_stream << " " << v; + } + } + cell_stream << "\n"; + total_size += cell_size + 1; // +1 for cell size + + } else { + // Standard cell types write vertex connectivity directly + std::vector vertices; + + for(auto itvert = alcc.template one_dart_per_incident_cell<0, 3>(itvol).begin(), + itvertend = alcc.template one_dart_per_incident_cell<0, 3>(itvol).end(); + itvert != itvertend; ++itvert) + { + vertices.push_back(vertex_index[alcc.vertex_attribute(itvert)]); + } + + cell_stream << vertices.size(); + for(auto v : vertices) { + cell_stream << " " << v; + } + cell_stream << "\n"; + total_size += vertices.size() + 1; + } + } + + // Write cells section + os << "CELLS " << nbcells << " " << total_size << "\n"; + os << cell_stream.str(); + os << "\n"; + + // Write cell types + os << "CELL_TYPES " << nbcells << "\n"; + os << type_stream.str(); + os << "\n"; + + // Write vertex scalars if ptval is not nullptr + if constexpr(!std::is_same_v) { + os << "POINT_DATA " << nbpts << "\n"; + os << "SCALARS vertex_scalars " << gettype::name() << " 1\n"; + os << "LOOKUP_TABLE default\n"; + for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { + auto dart = alcc.template dart_of_attribute<0>(itv); + CGAL_assertion(dart != alcc.null_dart_descriptor); + os << ptval(alcc, dart) << "\n"; + } + } + + // Write cell scalars if cellval is not nullptr/pointer + if constexpr(!std::is_same_v && !std::is_pointer_v) { + os << "CELL_DATA " << nbcells << "\n"; + os << "SCALARS volume_scalars " << gettype::name() << " 1\n"; + os << "LOOKUP_TABLE default\n"; + for(auto itvol = alcc.template one_dart_per_cell<3>().begin(), + itvolend = alcc.template one_dart_per_cell<3>().end(); + itvol != itvolend; ++itvol) + { + os << cellval(alcc, itvol) << "\n"; + } + } + + return true; +} + +} // namespace internal + +// ============================================================================ +// Public interface implementation +// ============================================================================ + +// Functor-based versions +template +inline bool read_lcc_from_vtk(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { + CGAL_assertion(filename != nullptr); + std::ifstream file(filename); + if(!file.is_open()) { + std::cerr << "[ERROR] read_lcc_from_vtk: cannot open file " << filename << std::endl; + return false; + } + return internal::read_lcc_from_vtk_ascii(file, alcc, vertex_reader, cell_reader); +} + +template +inline bool write_lcc_to_vtk(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval) { + CGAL_assertion(filename != nullptr); + std::ofstream file(filename); + if(!file.is_open()) { + std::cerr << "[ERROR] write_lcc_to_vtk: cannot open file " << filename << std::endl; + return false; + } + return internal::write_lcc_to_vtk_ascii(file, alcc, ptval, cellval); +} + +// Vector-based versions (convenience wrappers) +template +inline bool read_lcc_from_vtk(LCC& alcc, + const char* filename, + std::vector* vertex_scalars, + std::vector* volume_scalars) { + auto v_writer = [&](std::size_t i, ScalarType val) { + if(vertex_scalars) { + if(vertex_scalars->size() <= i) + vertex_scalars->resize(i + 1); + (*vertex_scalars)[i] = val; + } + }; + auto c_writer = [&](std::size_t i, ScalarType val) { + if(volume_scalars) { + if(volume_scalars->size() <= i) + volume_scalars->resize(i + 1); + (*volume_scalars)[i] = val; + } + }; + return read_lcc_from_vtk(alcc, filename, v_writer, c_writer); +} + +template +inline bool write_lcc_to_vtk(const LCC& alcc, + const char* filename, + const std::vector* vertex_scalars, + const std::vector* volume_scalars) { + // Build index maps + std::unordered_map vertex_indices; + std::size_t idx = 0; + for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) + vertex_indices[itv] = idx++; + + std::unordered_map volume_indices; + idx = 0; + for(auto itvol = alcc.template one_dart_per_cell<3>().begin(), itvolend = alcc.template one_dart_per_cell<3>().end(); + itvol != itvolend; ++itvol) + volume_indices[itvol] = idx++; + + return write_lcc_to_vtk( + alcc, filename, + [vertex_scalars, &vertex_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> ScalarType { + if(vertex_scalars) + return (*vertex_scalars)[vertex_indices.at(lcc.attribute<0>(d))]; + return ScalarType(); + }, + [volume_scalars, &volume_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> ScalarType { + if(volume_scalars) + return (*volume_scalars)[volume_indices.at(d)]; + return ScalarType(); + }); +} } // namespace CGAL -#include - #endif // CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h deleted file mode 100644 index 17b13369b96..00000000000 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io_impl.h +++ /dev/null @@ -1,524 +0,0 @@ -// Copyright (c) 2025 CNRS and LIRIS' Establishments (France). -// All rights reserved. -// -// This file is part of CGAL (www.cgal.org) -// -// $URL$ -// $Id$ -// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial -// -// Author(s) : Guillaume Damiand - -#ifndef CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H -#define CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H 1 - -#include -#include -#include -#include -#include -#include -#include - -namespace CGAL { - -namespace internal { - -// VTK cell type constants -enum VTK_Cell_Type { - VTK_TETRA = 10, - VTK_VOXEL = 11, - VTK_HEXAHEDRON = 12, - VTK_WEDGE = 13, - VTK_PYRAMID = 14, - VTK_PENTAGONAL_PRISM = 15, - VTK_HEXAGONAL_PRISM = 16, - VTK_POLYHEDRON = 42 -}; - -// Helper function to create a wedge/prism using the incremental builder -template -void create_wedge(LCC& lcc, - typename LCC::Vertex_attribute_descriptor p0, - typename LCC::Vertex_attribute_descriptor p1, - typename LCC::Vertex_attribute_descriptor p2, - typename LCC::Vertex_attribute_descriptor p3, - typename LCC::Vertex_attribute_descriptor p4, - typename LCC::Vertex_attribute_descriptor p5) -{ - // Create wedge using incremental builder - // A wedge has 2 triangular faces and 3 quadrilateral faces - typename LCC::Dart_descriptor d1, d2, d3, d4, d5; - - // Create the triangular faces - d1 = lcc.make_triangle(p0, p1, p2); - d2 = lcc.make_triangle(p3, p5, p4); // reversed order for proper orientation - - // Create quadrilateral faces - d3 = lcc.make_quadrangle(p0, p3, p4, p1); - d4 = lcc.make_quadrangle(p1, p4, p5, p2); - d5 = lcc.make_quadrangle(p2, p5, p3, p0); - - // Now we need to sew these faces together - // This is a simplified approach in practice, you'd need to carefully - // manage the dart orientations and sewing operations - // For now, we'll leave them as separate faces -} - -// Helper function to create a pyramid -template -void create_pyramid(LCC& lcc, - typename LCC::Vertex_attribute_descriptor p0, - typename LCC::Vertex_attribute_descriptor p1, - typename LCC::Vertex_attribute_descriptor p2, - typename LCC::Vertex_attribute_descriptor p3, - typename LCC::Vertex_attribute_descriptor p4) -{ - // Create pyramid using incremental builder - // A pyramid has 1 quadrilateral base and 4 triangular faces - - // Create the quadrilateral base - typename LCC::Dart_descriptor base = lcc.make_quadrangle(p0, p1, p2, p3); - - // Create triangular faces - lcc.make_triangle(p0, p4, p1); - lcc.make_triangle(p1, p4, p2); - lcc.make_triangle(p2, p4, p3); - lcc.make_triangle(p3, p4, p0); - - // This creates separate faces. For a proper pyramid, you'd need - // to sew these faces together using the sew operations of the LCC -} - -// Helper to determine cell topology -template -VTK_Cell_Type get_vtk_cell_type(const LCC& lcc, - typename LCC::Dart_const_descriptor dart) -{ - // Count vertices and faces to determine cell type - std::size_t num_vertices = 0; - std::size_t num_faces = 0; - - for (auto it = lcc.template one_dart_per_incident_cell<0,3>(dart).begin(), - itend = lcc.template one_dart_per_incident_cell<0,3>(dart).end(); - it != itend; ++it) { - ++num_vertices; - } - - for (auto it = lcc.template one_dart_per_incident_cell<2,3>(dart).begin(), - itend = lcc.template one_dart_per_incident_cell<2,3>(dart).end(); - it != itend; ++it) { - ++num_faces; - } - - // Simple heuristic based on vertex/face count - if (num_vertices == 4 && num_faces == 4) return VTK_TETRA; - if (num_vertices == 8 && num_faces == 6) return VTK_HEXAHEDRON; - if (num_vertices == 5 && num_faces == 5) return VTK_PYRAMID; - if (num_vertices == 6 && num_faces == 5) return VTK_WEDGE; - if (num_vertices == 10 && num_faces == 7) return VTK_PENTAGONAL_PRISM; - if (num_vertices == 12 && num_faces == 8) return VTK_HEXAGONAL_PRISM; - - return VTK_POLYHEDRON; // Default to generic polyhedron -} - -template -bool read_vtk_ascii(std::istream& is, - LCC& alcc, - std::vector* vertex_scalars, - std::vector* volume_scalars) -{ - static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, - "read_vtk() only supports 3D Linear_cell_complexes (3,3)"); - - using Point = typename LCC::Point; - using FT = typename LCC::FT; - - alcc.clear(); - - std::string line, tmp; - std::size_t npoints, ncells; - - // Skip to POINTS section - while (std::getline(is, line)) { - if (line.find("POINTS") != std::string::npos) break; - } - if (is.eof()) { - std::cerr << "[ERROR] read_vtk: POINTS section not found" << std::endl; - return false; - } - - std::stringstream ss(line); - std::getline(ss, tmp, ' '); // skip "POINTS" - ss >> npoints; - - // Read points - std::vector points(npoints); - FT x, y, z; - for (std::size_t i = 0; i < npoints; ++i) { - if (!(is >> x >> y >> z)) { - std::cerr << "[ERROR] read_vtk: failed to read point " << i << std::endl; - return false; - } - points[i] = alcc.create_vertex_attribute(Point(x, y, z)); - } - - // Skip to CELLS section - while (std::getline(is, line)) { - if (line.find("CELLS") != std::string::npos) break; - } - if (is.eof()) { - std::cerr << "[ERROR] read_vtk: CELLS section not found" << std::endl; - return false; - } - - ss = std::stringstream(line); - std::getline(ss, tmp, ' '); // skip "CELLS" - ss >> ncells; - - // Read connectivity - std::vector> faces(ncells); - std::size_t points_per_cell; - for (std::size_t i = 0; i < ncells; ++i) { - if (!(is >> points_per_cell)) { - std::cerr << "[ERROR] read_vtk: failed to read cell " << i << std::endl; - return false; - } - faces[i].resize(points_per_cell); - for (std::size_t j = 0; j < points_per_cell; ++j) { - if (!(is >> faces[i][j])) { - std::cerr << "[ERROR] read_vtk: failed to read cell " << i - << " vertex " << j << std::endl; - return false; - } - } - } - - // Skip to CELL_TYPES section - while (std::getline(is, line)) { - if (line.find("CELL_TYPES") != std::string::npos) break; - } - if (is.eof()) { - std::cerr << "[ERROR] read_vtk: CELL_TYPES section not found" << std::endl; - return false; - } - - // Create cells based on types - std::size_t cell_type; - for (std::size_t i = 0; i < ncells; ++i) { - if (!(is >> cell_type)) { - std::cerr << "[ERROR] read_vtk: failed to read cell type " << i << std::endl; - return false; - } - - const auto& cell_vertices = faces[i]; - - switch (cell_type) { - case VTK_TETRA: - if (cell_vertices.size() == 4) { - alcc.make_tetrahedron(points[cell_vertices[0]], points[cell_vertices[1]], - points[cell_vertices[2]], points[cell_vertices[3]]); - } - break; - - case VTK_VOXEL: - if (cell_vertices.size() == 8) { - // VTK voxel has different vertex ordering than standard hexahedron - alcc.make_hexahedron(points[cell_vertices[0]], points[cell_vertices[1]], - points[cell_vertices[3]], points[cell_vertices[2]], - points[cell_vertices[4]], points[cell_vertices[5]], - points[cell_vertices[7]], points[cell_vertices[6]]); - } - break; - - case VTK_HEXAHEDRON: - if (cell_vertices.size() == 8) { - alcc.make_hexahedron(points[cell_vertices[0]], points[cell_vertices[1]], - points[cell_vertices[2]], points[cell_vertices[3]], - points[cell_vertices[4]], points[cell_vertices[5]], - points[cell_vertices[6]], points[cell_vertices[7]]); - } - break; - - case VTK_WEDGE: - if (cell_vertices.size() == 6) { - // Use helper function to create wedge - create_wedge(alcc, points[cell_vertices[0]], points[cell_vertices[1]], - points[cell_vertices[2]], points[cell_vertices[3]], - points[cell_vertices[4]], points[cell_vertices[5]]); - } - break; - - case VTK_PYRAMID: - if (cell_vertices.size() == 5) { - // Use helper function to create pyramid - create_pyramid(alcc, points[cell_vertices[0]], points[cell_vertices[1]], - points[cell_vertices[2]], points[cell_vertices[3]], - points[cell_vertices[4]]); - } - break; - - case VTK_POLYHEDRON: - // For generic polyhedron, we'd need more complex construction - // This is a simplified version in practice, VTK polyhedron format - // includes face connectivity information that we're not parsing here - std::cerr << "[WARNING] read_vtk: VTK_POLYHEDRON not fully supported yet" << std::endl; - break; - - default: - std::cerr << "[ERROR] read_vtk: unsupported cell type " << cell_type << std::endl; - break; - } - } - - // Clean up unused vertex attributes - for (auto itv = alcc.vertex_attributes().begin(); - itv != alcc.vertex_attributes().end(); ) { - if (alcc.template dart_of_attribute<0>(itv) == alcc.null_descriptor) { - alcc.erase_vertex_attribute(itv); - } else { - ++itv; - } - } - - // Try to read scalar data if requested - if (vertex_scalars != nullptr) { - vertex_scalars->clear(); - // Look for POINT_DATA section - while (std::getline(is, line)) { - if (line.find("POINT_DATA") != std::string::npos) { - std::size_t ndata; - ss = std::stringstream(line); - std::getline(ss, tmp, ' '); // skip "POINT_DATA" - ss >> ndata; - - // Skip SCALARS and LOOKUP_TABLE lines - std::getline(is, line); // SCALARS line - std::getline(is, line); // LOOKUP_TABLE line - - vertex_scalars->resize(ndata); - for (std::size_t i = 0; i < ndata; ++i) { - if (!(is >> (*vertex_scalars)[i])) { - std::cerr << "[WARNING] read_vtk: failed to read vertex scalar " << i << std::endl; - vertex_scalars->clear(); - break; - } - } - break; - } - } - } - - if (volume_scalars != nullptr) { - volume_scalars->clear(); - // Reset stream or continue from current position - while (std::getline(is, line)) { - if (line.find("CELL_DATA") != std::string::npos) { - std::size_t ndata; - ss = std::stringstream(line); - std::getline(ss, tmp, ' '); // skip "CELL_DATA" - ss >> ndata; - - // Skip SCALARS and LOOKUP_TABLE lines - std::getline(is, line); // SCALARS line - std::getline(is, line); // LOOKUP_TABLE line - - volume_scalars->resize(ndata); - for (std::size_t i = 0; i < ndata; ++i) { - if (!(is >> (*volume_scalars)[i])) { - std::cerr << "[WARNING] read_vtk: failed to read volume scalar " << i << std::endl; - volume_scalars->clear(); - break; - } - } - break; - } - } - } - - return true; -} - -template -bool write_vtk_ascii(std::ostream& os, - const LCC& alcc, - const std::vector* vertex_scalars, - const std::vector* volume_scalars) -{ - static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, - "write_vtk() only supports 3D Linear_cell_complexes (3,3)"); - - // Write VTK header - os << "# vtk DataFile Version 2.0\n"; - os << "CGAL Linear_cell_complex\n"; - os << "ASCII\n"; - os << "DATASET UNSTRUCTURED_GRID\n\n"; - - // Build vertex index map - std::unordered_map vertex_index; - std::size_t nbpts = 0; - - for (auto itv = alcc.vertex_attributes().begin(), - itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { - vertex_index[itv] = nbpts++; - } - - // Write points - os << "POINTS " << nbpts << " double\n"; - for (auto itv = alcc.vertex_attributes().begin(), - itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { - const auto& p = itv->point(); - os << p.x() << " " << p.y() << " " << p.z() << "\n"; - } - os << "\n"; - - // Count cells and build connectivity - std::size_t nbcells = 0; - std::size_t total_size = 0; - std::ostringstream cell_stream; - std::ostringstream type_stream; - - for (auto itvol = alcc.template one_dart_per_cell<3>().begin(), - itvolend = alcc.template one_dart_per_cell<3>().end(); - itvol != itvolend; ++itvol) { - - ++nbcells; - VTK_Cell_Type cell_type = get_vtk_cell_type(alcc, itvol); - type_stream << static_cast(cell_type) << "\n"; - - if (cell_type == VTK_POLYHEDRON) { - // Generic polyhedron format write as face-vertex connectivity - std::vector> faces; - std::size_t cell_size = 1; // Start with 1 for number of faces - - for (auto itface = alcc.template one_dart_per_incident_cell<2,3>(itvol).begin(), - itfaceend = alcc.template one_dart_per_incident_cell<2,3>(itvol).end(); - itface != itfaceend; ++itface) { - - faces.push_back(std::vector()); - auto& face = faces.back(); - - for (auto itvert = alcc.template darts_of_orbit<1>(itface).begin(), - itvertend = alcc.template darts_of_orbit<1>(itface).end(); - itvert != itvertend; ++itvert) { - face.push_back(vertex_index[alcc.vertex_attribute(itvert)]); - } - cell_size += face.size() + 1; // +1 for face size - } - - cell_stream << cell_size << " " << faces.size(); - for (const auto& face : faces) { - cell_stream << " " << face.size(); - for (auto v : face) { - cell_stream << " " << v; - } - } - cell_stream << "\n"; - total_size += cell_size + 1; // +1 for cell size - - } else { - // Standard cell types write vertex connectivity directly - std::vector vertices; - - for (auto itvert = alcc.template one_dart_per_incident_cell<0,3>(itvol).begin(), - itvertend = alcc.template one_dart_per_incident_cell<0,3>(itvol).end(); - itvert != itvertend; ++itvert) { - vertices.push_back(vertex_index[alcc.vertex_attribute(itvert)]); - } - - cell_stream << vertices.size(); - for (auto v : vertices) { - cell_stream << " " << v; - } - cell_stream << "\n"; - total_size += vertices.size() + 1; - } - } - - // Write cells section - os << "CELLS " << nbcells << " " << total_size << "\n"; - os << cell_stream.str(); - os << "\n"; - - // Write cell types - os << "CELL_TYPES " << nbcells << "\n"; - os << type_stream.str(); - os << "\n"; - - // Write vertex scalars if provided - if (vertex_scalars != nullptr) { - if (vertex_scalars->size() != nbpts) { - std::cerr << "[ERROR] write_vtk: vertex_scalars size (" << vertex_scalars->size() - << ") does not match number of vertices (" << nbpts << ")" << std::endl; - return false; - } - - os << "POINT_DATA " << nbpts << "\n"; - os << "SCALARS vertex_scalars float 1\n"; - os << "LOOKUP_TABLE default\n"; - for (float val : *vertex_scalars) { - os << val << "\n"; - } - os << "\n"; - } - - // Write volume scalars if provided - if (volume_scalars != nullptr) { - if (volume_scalars->size() != nbcells) { - std::cerr << "[ERROR] write_vtk: volume_scalars size (" << volume_scalars->size() - << ") does not match number of cells (" << nbcells << ")" << std::endl; - return false; - } - - os << "CELL_DATA " << nbcells << "\n"; - os << "SCALARS volume_scalars float 1\n"; - os << "LOOKUP_TABLE default\n"; - for (float val : *volume_scalars) { - os << val << "\n"; - } - } - - return true; -} - -} // namespace internal - -// Public interface implementation - -template -bool read_vtk(LCC& alcc, - const char* filename, - std::vector* vertex_scalars, - std::vector* volume_scalars) -{ - CGAL_assertion(filename != nullptr); - - std::ifstream file(filename); - if (!file.is_open()) { - std::cerr << "[ERROR] read_vtk: cannot open file " << filename << std::endl; - return false; - } - - return internal::read_vtk_ascii(file, alcc, vertex_scalars, volume_scalars); -} - -template -bool write_vtk(const LCC& alcc, - const char* filename, - const std::vector* vertex_scalars, - const std::vector* volume_scalars) -{ - CGAL_assertion(filename != nullptr); - - std::ofstream file(filename); - if (!file.is_open()) { - std::cerr << "[ERROR] write_vtk: cannot open file " << filename << std::endl; - return false; - } - - return internal::write_vtk_ascii(file, alcc, vertex_scalars, volume_scalars); -} - -} // namespace CGAL - -#endif // CGAL_LINEAR_CELL_COMPLEX_VTK_IO_IMPL_H \ No newline at end of file diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index fb6d9ab10fb..9530c5b3ed8 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -1,48 +1,45 @@ #include #include - -#include -#include #include -#include +#include +#include +#include typedef CGAL::Linear_cell_complex_for_combinatorial_map<3, 3> LCC; -typedef LCC::Point Point; -int main() -{ - LCC lcc_out; +int main() { + LCC lcc1, lcc2; + std::vector v_scalars1, vol_scalars1; + std::vector v_scalars2, vol_scalars2; - // Create a hexahedron - auto d = lcc_out.make_hexahedron( - lcc_out.create_vertex_attribute(Point(0, 0, 0)), - lcc_out.create_vertex_attribute(Point(1, 0, 0)), - lcc_out.create_vertex_attribute(Point(1, 1, 0)), - lcc_out.create_vertex_attribute(Point(0, 1, 0)), - lcc_out.create_vertex_attribute(Point(0, 0, 1)), - lcc_out.create_vertex_attribute(Point(1, 0, 1)), - lcc_out.create_vertex_attribute(Point(1, 1, 1)), - lcc_out.create_vertex_attribute(Point(0, 1, 1)) - ); + const std::string input_file = "data/beam-with-mixed-cells.vtk"; + assert(CGAL::read_lcc_from_vtk(lcc1, input_file.c_str(), &v_scalars1, &vol_scalars1)); - std::vector v_scalars = {1,2,3,4,5,6,7,8}; - std::vector vol_scalars = {42.0f}; + // Build index maps + std::unordered_map vertex_indices; + std::size_t idx = 0; + for(auto itv = lcc1.vertex_attributes().begin(), itvend = lcc1.vertex_attributes().end(); itv != itvend; ++itv) + vertex_indices[itv] = idx++; + std::unordered_map volume_indices; + idx = 0; + for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; + ++itvol) + volume_indices[itvol] = idx++; - const char* fname = "tmp_test_lcc_vtk.vtk"; + const char* tmp_file = "tmp_test_lcc_vtk.vtk"; + assert(CGAL::write_lcc_to_vtk( + lcc1, tmp_file, + [&v_scalars1, &vertex_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { + return v_scalars1[vertex_indices.at(lcc.attribute<0>(d))]; + }, + [&vol_scalars1, &volume_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { + return vol_scalars1[volume_indices.at(d)]; + })); + assert(CGAL::read_lcc_from_vtk(lcc2, tmp_file, &v_scalars2, &vol_scalars2)); - assert(CGAL::write_vtk(lcc_out, fname, &v_scalars, &vol_scalars)); + assert(lcc1.is_isomorphic_to(lcc2, false, true, true)); - LCC lcc_in; - std::vector v_scalars_in, vol_scalars_in; - - assert(CGAL::read_vtk(lcc_in, fname, &v_scalars_in, &vol_scalars_in)); - - assert(lcc_in.number_of_vertex_attributes() == lcc_out.number_of_vertex_attributes()); - assert(lcc_in.template number_of_cells<3>() == lcc_out.template number_of_cells<3>()); - assert(v_scalars_in.size() == v_scalars.size()); - assert(vol_scalars_in.size() == vol_scalars.size()); - - std::remove(fname); + std::remove(tmp_file); return EXIT_SUCCESS; } \ No newline at end of file diff --git a/Linear_cell_complex/test/Linear_cell_complex/data/beam-with-mixed-cells.vtk b/Linear_cell_complex/test/Linear_cell_complex/data/beam-with-mixed-cells.vtk new file mode 100644 index 00000000000..3197599a238 --- /dev/null +++ b/Linear_cell_complex/test/Linear_cell_complex/data/beam-with-mixed-cells.vtk @@ -0,0 +1,11 @@ +# vtk DataFile Version 2.0 +CGAL Linear_cell_complex +ASCII +DATASET UNSTRUCTURED_GRID + +POINTS 0 double + +CELLS 0 0 + +CELL_TYPES 0 + From e0634c4ab1a6e6d8e4d56511c1ad4f8d8696ef80 Mon Sep 17 00:00:00 2001 From: Yliess Bellargui Date: Wed, 6 Aug 2025 22:34:33 +0200 Subject: [PATCH 03/30] Add VTK I/O support for Linear_cell_complex --- .../Testing/Temporary/CTestCostData.txt | 1 + .../Testing/Temporary/LastTest.log | 3 + .../linear_cell_complex_3_vtk_io.cpp | 6 +- .../IO/VTK.h} | 63 +- .../Linear_cell_complex_vtk_io_test.cpp | 8 +- .../data/mixed-linear-bending-pdisttosurf.vtk | 673 ++++++++++++++++++ .../File_formats/Supported_file_formats.txt | 25 + Testing/Temporary/CTestCostData.txt | 1 + Testing/Temporary/LastTest.log | 3 + 9 files changed, 745 insertions(+), 38 deletions(-) create mode 100644 Linear_cell_complex/Testing/Temporary/CTestCostData.txt create mode 100644 Linear_cell_complex/Testing/Temporary/LastTest.log rename Linear_cell_complex/include/CGAL/{Linear_cell_complex_vtk_io.h => Linear_cell_complex/IO/VTK.h} (89%) create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/mixed-linear-bending-pdisttosurf.vtk create mode 100644 Testing/Temporary/CTestCostData.txt create mode 100644 Testing/Temporary/LastTest.log diff --git a/Linear_cell_complex/Testing/Temporary/CTestCostData.txt b/Linear_cell_complex/Testing/Temporary/CTestCostData.txt new file mode 100644 index 00000000000..ed97d539c09 --- /dev/null +++ b/Linear_cell_complex/Testing/Temporary/CTestCostData.txt @@ -0,0 +1 @@ +--- diff --git a/Linear_cell_complex/Testing/Temporary/LastTest.log b/Linear_cell_complex/Testing/Temporary/LastTest.log new file mode 100644 index 00000000000..7016d17c7c2 --- /dev/null +++ b/Linear_cell_complex/Testing/Temporary/LastTest.log @@ -0,0 +1,3 @@ +Start testing: Jul 25 15:46 CEST +---------------------------------------------------------- +End testing: Jul 25 15:46 CEST diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 2f383fa24d5..6c080d0508f 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -6,11 +6,11 @@ \cgal function `CGAL::load_combinatorial_map()`. It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file with - `CGAL::write_lcc_to_vtk()`, using the computed values as scalars for each volume. + `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. */ #include -#include +#include #include #include #include @@ -24,6 +24,6 @@ int main() std::vector v; for(auto it = lcc.template one_dart_per_cell<3>().begin(), itend = lcc.template one_dart_per_cell<3>().end(); it != itend; ++it) v.push_back(std::distance(lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).begin(), lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).end())); - CGAL::write_lcc_to_vtk(lcc, "data/beam-with-mixed-cells.vtk", nullptr, &v); + CGAL::IO::write_VTK(lcc, "data/beam-with-mixed-cells.vtk", nullptr, &v); return EXIT_SUCCESS; } \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h similarity index 89% rename from Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h rename to Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index dcdc5658994..7cb0d8dd660 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_vtk_io.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -9,10 +9,9 @@ // // Author(s) : Guillaume Damiand -#ifndef CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H -#define CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H 1 - -#include "Linear_cell_complex_incremental_builder_3.h" +#ifndef CGAL_LCC_IO_VTK_H +#define CGAL_LCC_IO_VTK_H 1 +#include #include #include #include @@ -22,8 +21,9 @@ #include namespace CGAL { +namespace IO { -/** \file Linear_cell_complex_vtk_io.h +/** \file VTK.h * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII format. * * Only supports: @@ -60,7 +60,7 @@ namespace CGAL { * \return `true` if loading was successful, `false` otherwise */ template -bool read_lcc_from_vtk(LCC& alcc, +bool read_VTK(LCC& alcc, const char* filename, std::vector* vertex_scalars = nullptr, std::vector* volume_scalars = nullptr); @@ -79,17 +79,17 @@ bool read_lcc_from_vtk(LCC& alcc, * \return `true` if writing was successful, `false` otherwise */ template -bool write_lcc_to_vtk(const LCC& alcc, +bool write_VTK(const LCC& alcc, const char* filename, const std::vector* vertex_scalars = nullptr, const std::vector* volume_scalars = nullptr); // Advanced versions with functors template -bool read_lcc_from_vtk(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader); +bool read_VTK(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader); template -bool write_lcc_to_vtk(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval); +bool write_VTK(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval); // ============================================================================ // Implementation details @@ -175,7 +175,7 @@ bool read_scalar_by_vtk_type(std::istream& is, const std::string& vtk_type, std: f(i, v); } } else { - std::cerr << "[ERROR] read_lcc_from_vtk: unsupported scalar type: " << vtk_type << std::endl; + std::cerr << "[ERROR] read_VTK: unsupported scalar type: " << vtk_type << std::endl; return false; } return true; @@ -274,7 +274,7 @@ template inline VTK_Cell_Type get_vtk_cell_type(co template bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, - "read_lcc_from_vtk() only supports 3D Linear_cell_complexes (3,3)"); + "read_VTK() only supports 3D Linear_cell_complexes (3,3)"); using Point = typename LCC::Point; using FT = typename LCC::FT; @@ -292,7 +292,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver break; } if(is.eof()) { - std::cerr << "[ERROR] read_lcc_from_vtk: POINTS section not found" << std::endl; + std::cerr << "[ERROR] read_VTK: POINTS section not found" << std::endl; return false; } @@ -305,7 +305,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver for(std::size_t i = 0; i < npoints; ++i) { FT x, y, z; if(!(is >> x >> y >> z)) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read point " << i << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read point " << i << std::endl; return false; } points[i] = ib.add_vertex(Point(x, y, z)); @@ -317,7 +317,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver break; } if(is.eof()) { - std::cerr << "[ERROR] read_lcc_from_vtk: CELLS section not found" << std::endl; + std::cerr << "[ERROR] read_VTK: CELLS section not found" << std::endl; return false; } @@ -330,13 +330,13 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver std::size_t points_per_cell; for(std::size_t i = 0; i < ncells; ++i) { if(!(is >> points_per_cell)) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell " << i << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read cell " << i << std::endl; return false; } faces[i].resize(points_per_cell); for(std::size_t j = 0; j < points_per_cell; ++j) { if(!(is >> faces[i][j])) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell " << i << " vertex " << j << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read cell " << i << " vertex " << j << std::endl; return false; } } @@ -348,7 +348,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver break; } if(is.eof()) { - std::cerr << "[ERROR] read_lcc_from_vtk: CELL_TYPES section not found" << std::endl; + std::cerr << "[ERROR] read_VTK: CELL_TYPES section not found" << std::endl; return false; } @@ -356,7 +356,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver std::size_t cell_type; for(std::size_t i = 0; i < ncells; ++i) { if(!(is >> cell_type)) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read cell type " << i << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read cell type " << i << std::endl; return false; } const auto& v = faces[i]; @@ -393,7 +393,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver make_generic_cell_with_builder(ib, v); break; default: - std::cerr << "[ERROR] read_lcc_from_vtk: type " << cell_type << " unknown." << std::endl; + std::cerr << "[ERROR] read_VTK: type " << cell_type << " unknown." << std::endl; } } @@ -422,7 +422,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver std::getline(is, line); // LOOKUP_TABLE line if(!read_scalar_by_vtk_type(is, vtk_type, ndata, vertex_reader)) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read POINT_DATA" << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read POINT_DATA" << std::endl; } break; } @@ -444,7 +444,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver std::getline(is, line); // LOOKUP_TABLE line if(!read_scalar_by_vtk_type(is, vtk_type, ndata, cell_reader)) { - std::cerr << "[ERROR] read_lcc_from_vtk: failed to read CELL_DATA" << std::endl; + std::cerr << "[ERROR] read_VTK: failed to read CELL_DATA" << std::endl; } break; } @@ -456,7 +456,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver template bool write_lcc_to_vtk_ascii(std::ostream& os, const LCC& alcc, PointFunctor ptval, CellFunctor cellval) { static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, - "write_lcc_to_vtk() only supports 3D Linear_cell_complexes (3,3)"); + "write_VTK() only supports 3D Linear_cell_complexes (3,3)"); // Write VTK header os << "# vtk DataFile Version 2.0\n"; @@ -590,22 +590,22 @@ bool write_lcc_to_vtk_ascii(std::ostream& os, const LCC& alcc, PointFunctor ptva // Functor-based versions template -inline bool read_lcc_from_vtk(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { +inline bool read_VTK(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { CGAL_assertion(filename != nullptr); std::ifstream file(filename); if(!file.is_open()) { - std::cerr << "[ERROR] read_lcc_from_vtk: cannot open file " << filename << std::endl; + std::cerr << "[ERROR] read_VTK: cannot open file " << filename << std::endl; return false; } return internal::read_lcc_from_vtk_ascii(file, alcc, vertex_reader, cell_reader); } template -inline bool write_lcc_to_vtk(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval) { +inline bool write_VTK(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval) { CGAL_assertion(filename != nullptr); std::ofstream file(filename); if(!file.is_open()) { - std::cerr << "[ERROR] write_lcc_to_vtk: cannot open file " << filename << std::endl; + std::cerr << "[ERROR] write_VTK: cannot open file " << filename << std::endl; return false; } return internal::write_lcc_to_vtk_ascii(file, alcc, ptval, cellval); @@ -613,7 +613,7 @@ inline bool write_lcc_to_vtk(const LCC& alcc, const char* filename, PointFunctor // Vector-based versions (convenience wrappers) template -inline bool read_lcc_from_vtk(LCC& alcc, +inline bool read_VTK(LCC& alcc, const char* filename, std::vector* vertex_scalars, std::vector* volume_scalars) { @@ -631,11 +631,11 @@ inline bool read_lcc_from_vtk(LCC& alcc, (*volume_scalars)[i] = val; } }; - return read_lcc_from_vtk(alcc, filename, v_writer, c_writer); + return read_VTK(alcc, filename, v_writer, c_writer); } template -inline bool write_lcc_to_vtk(const LCC& alcc, +inline bool write_VTK(const LCC& alcc, const char* filename, const std::vector* vertex_scalars, const std::vector* volume_scalars) { @@ -651,7 +651,7 @@ inline bool write_lcc_to_vtk(const LCC& alcc, itvol != itvolend; ++itvol) volume_indices[itvol] = idx++; - return write_lcc_to_vtk( + return write_VTK( alcc, filename, [vertex_scalars, &vertex_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> ScalarType { if(vertex_scalars) @@ -665,6 +665,7 @@ inline bool write_lcc_to_vtk(const LCC& alcc, }); } +} // namespace IO } // namespace CGAL -#endif // CGAL_LINEAR_CELL_COMPLEX_VTK_IO_H \ No newline at end of file +#endif // CGAL_LCC_IO_VTK_H \ No newline at end of file diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index 9530c5b3ed8..93aa2a27d7d 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -1,5 +1,5 @@ #include -#include +#include #include #include #include @@ -13,7 +13,7 @@ int main() { std::vector v_scalars2, vol_scalars2; const std::string input_file = "data/beam-with-mixed-cells.vtk"; - assert(CGAL::read_lcc_from_vtk(lcc1, input_file.c_str(), &v_scalars1, &vol_scalars1)); + assert(CGAL::IO::read_VTK(lcc1, input_file.c_str(), &v_scalars1, &vol_scalars1)); // Build index maps std::unordered_map vertex_indices; @@ -27,7 +27,7 @@ int main() { volume_indices[itvol] = idx++; const char* tmp_file = "tmp_test_lcc_vtk.vtk"; - assert(CGAL::write_lcc_to_vtk( + assert(CGAL::IO::write_VTK( lcc1, tmp_file, [&v_scalars1, &vertex_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { return v_scalars1[vertex_indices.at(lcc.attribute<0>(d))]; @@ -35,7 +35,7 @@ int main() { [&vol_scalars1, &volume_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { return vol_scalars1[volume_indices.at(d)]; })); - assert(CGAL::read_lcc_from_vtk(lcc2, tmp_file, &v_scalars2, &vol_scalars2)); + assert(CGAL::IO::read_VTK(lcc2, tmp_file, &v_scalars2, &vol_scalars2)); assert(lcc1.is_isomorphic_to(lcc2, false, true, true)); diff --git a/Linear_cell_complex/test/Linear_cell_complex/data/mixed-linear-bending-pdisttosurf.vtk b/Linear_cell_complex/test/Linear_cell_complex/data/mixed-linear-bending-pdisttosurf.vtk new file mode 100644 index 00000000000..1aaee160410 --- /dev/null +++ b/Linear_cell_complex/test/Linear_cell_complex/data/mixed-linear-bending-pdisttosurf.vtk @@ -0,0 +1,673 @@ +# vtk DataFile Version 2.0 +3D Mesh +ASCII +DATASET UNSTRUCTURED_GRID +POINTS 329 double + 0.117844 -0.279767 1.08011 + 0.102602 -0.267148 1.0493 + 0.199542 -0.280426 1.08011 + 0.199629 -0.318181 1.17014 + -0.000927929 -0.355862 1.26093 + 0.199648 -0.350348 1.24569 + 0.199633 -0.356614 1.26021 + -0.00154631 -0.287035 1.10025 + -0.00215992 -0.206748 0.900091 + 0.0388902 -0.279312 1.08045 + 0.000544925 -0.0928771 1.15542 + 2.50809e-05 -0.0188471 0.969227 + 0.000474716 -0.170576 1.33869 + -0.00146544 -0.279058 1.08055 + 0.000479773 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+0.0267525 +0.00148643 +0.0306218 +0.0011962 +0.00116897 +0.0111871 +0.00155375 +0.0136078 +0.00125381 +0.00122616 +0.00151987 +0.0345086 +0.0384067 +0.0386557 +0.13807 +0.130271 +0.138627 +0.000383886 +0.0600847 diff --git a/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt b/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt index 53a1a22b2cf..b11507d338c 100644 --- a/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt +++ b/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt @@ -22,6 +22,7 @@ each specific format. - \ref IOStreamMedit - \ref IOStreamTetgen - \ref IOStreamWKT +- \ref IOStreamVTKLCC \section IOStreamOFF Object File Format (OFF) @@ -504,6 +505,30 @@ The following \cgal data structures can be exported into the `.VTU` file format: - `CGAL::Mesh_complex_3_in_triangulation_3`, using \link CGAL::IO::output_to_vtu() `CGAL::IO::output_to_vtu()` \endlink - `CGAL::Constrained_Delaunay_triangulation_2`, using the function \link CGAL::IO::write_VTU `CGAL::IO::write_VTU()` \endlink +\section IOStreamVTKLCC VTK Legacy File Format for Linear Cell Complex + +The VTK legacy format, using file extension `.vtk`, is an \ascii format used to store 3D volumetric meshes. +This specific implementation supports Linear Cell Complex structures with various 3D cell types including +tetrahedra, hexahedra, prisms, pyramids, and generic polyhedra. Optional scalar data can be associated +with both vertices and volumes. + + + + + + + + + + + + + + + + + +
VTK Legacy File Format for Linear Cell Complex
Input3D Volumetric Mesh`Linear_cell_complex_for_combinatorial_map<3,3>`CGAL::IO::read_VTK()
Output3D Volumetric Mesh`Linear_cell_complex_for_combinatorial_map<3,3>`CGAL::IO::write_VTK()
\section IOStreamAvizo Avizo File Format diff --git a/Testing/Temporary/CTestCostData.txt b/Testing/Temporary/CTestCostData.txt new file mode 100644 index 00000000000..ed97d539c09 --- /dev/null +++ b/Testing/Temporary/CTestCostData.txt @@ -0,0 +1 @@ +--- diff --git a/Testing/Temporary/LastTest.log b/Testing/Temporary/LastTest.log new file mode 100644 index 00000000000..7016d17c7c2 --- /dev/null +++ b/Testing/Temporary/LastTest.log @@ -0,0 +1,3 @@ +Start testing: Jul 25 15:46 CEST +---------------------------------------------------------- +End testing: Jul 25 15:46 CEST From 464c591b5a9b4a10b7de75efe95d0eb0cd668749 Mon Sep 17 00:00:00 2001 From: ybellargui Date: Mon, 11 Aug 2025 14:52:05 +0200 Subject: [PATCH 04/30] Add VTK I/O support for Linear_cell_complex with dual scalar types --- .../linear_cell_complex_3_vtk_io.cpp | 30 ++++++++++-- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 46 ++++++++++--------- .../Linear_cell_complex_vtk_io_test.cpp | 10 ++-- 3 files changed, 57 insertions(+), 29 deletions(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 6c080d0508f..d1f8483fac9 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -20,10 +20,30 @@ typedef CGAL::Linear_cell_complex_for_combinatorial_map<3> LCC; int main() { - LCC lcc; CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); - std::vector v; - for(auto it = lcc.template one_dart_per_cell<3>().begin(), itend = lcc.template one_dart_per_cell<3>().end(); it != itend; ++it) - v.push_back(std::distance(lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).begin(), lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).end())); - CGAL::IO::write_VTK(lcc, "data/beam-with-mixed-cells.vtk", nullptr, &v); + LCC lcc; + CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); + + // Compute per-volume vertex count + std::vector volume_scalars; + for(auto it = lcc.template one_dart_per_cell<3>().begin(), + itend = lcc.template one_dart_per_cell<3>().end(); + it != itend; ++it) + { + volume_scalars.push_back( + std::distance( + lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).begin(), + lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).end() + ) + ); + } + + // Write to VTK with explicit template parameters + CGAL::IO::write_VTK( + lcc, + "data/beam-with-mixed-cells.vtk", + nullptr, + &volume_scalars + ); + return EXIT_SUCCESS; } \ No newline at end of file diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index 7cb0d8dd660..11d3afcb46e 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -51,6 +51,8 @@ namespace IO { * \ingroup PkgLinearCellComplexExamples * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam VertexScalarType Type for vertex scalar data (default: float) + * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param alcc The Linear_cell_complex to populate (will be cleared first) * \param filename Path to the VTK file * \param vertex_scalars Optional output vector to store per-vertex scalar values. @@ -59,17 +61,19 @@ namespace IO { * If provided, will be resized to match number of volumes. * \return `true` if loading was successful, `false` otherwise */ -template +template bool read_VTK(LCC& alcc, const char* filename, - std::vector* vertex_scalars = nullptr, - std::vector* volume_scalars = nullptr); + std::vector* vertex_scalars = nullptr, + std::vector* volume_scalars = nullptr); /** * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. * \ingroup PkgLinearCellComplexExamples * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam VertexScalarType Type for vertex scalar data (default: float) + * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param alcc The Linear_cell_complex to export * \param filename Path to the output VTK file * \param vertex_scalars Optional per-vertex scalar data. If provided, must have @@ -78,11 +82,11 @@ bool read_VTK(LCC& alcc, * same size as number of 3-cells in the LCC. * \return `true` if writing was successful, `false` otherwise */ -template +template bool write_VTK(const LCC& alcc, const char* filename, - const std::vector* vertex_scalars = nullptr, - const std::vector* volume_scalars = nullptr); + const std::vector* vertex_scalars = nullptr, + const std::vector* volume_scalars = nullptr); // Advanced versions with functors template @@ -612,33 +616,33 @@ inline bool write_VTK(const LCC& alcc, const char* filename, PointFunctor ptval, } // Vector-based versions (convenience wrappers) -template +template inline bool read_VTK(LCC& alcc, const char* filename, - std::vector* vertex_scalars, - std::vector* volume_scalars) { - auto v_writer = [&](std::size_t i, ScalarType val) { + std::vector* vertex_scalars, + std::vector* volume_scalars) { + auto v_writer = [&](std::size_t i, auto val) { if(vertex_scalars) { if(vertex_scalars->size() <= i) vertex_scalars->resize(i + 1); - (*vertex_scalars)[i] = val; + (*vertex_scalars)[i] = static_cast(val); } }; - auto c_writer = [&](std::size_t i, ScalarType val) { + auto c_writer = [&](std::size_t i, auto val) { if(volume_scalars) { if(volume_scalars->size() <= i) volume_scalars->resize(i + 1); - (*volume_scalars)[i] = val; + (*volume_scalars)[i] = static_cast(val); } }; return read_VTK(alcc, filename, v_writer, c_writer); } -template +template inline bool write_VTK(const LCC& alcc, const char* filename, - const std::vector* vertex_scalars, - const std::vector* volume_scalars) { + const std::vector* vertex_scalars, + const std::vector* volume_scalars) { // Build index maps std::unordered_map vertex_indices; std::size_t idx = 0; @@ -653,15 +657,15 @@ inline bool write_VTK(const LCC& alcc, return write_VTK( alcc, filename, - [vertex_scalars, &vertex_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> ScalarType { + [vertex_scalars, &vertex_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> VertexScalarType { if(vertex_scalars) - return (*vertex_scalars)[vertex_indices.at(lcc.attribute<0>(d))]; - return ScalarType(); + return (*vertex_scalars)[vertex_indices.at(lcc.template attribute<0>(d))]; + return VertexScalarType(); }, - [volume_scalars, &volume_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> ScalarType { + [volume_scalars, &volume_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> VolumeScalarType { if(volume_scalars) return (*volume_scalars)[volume_indices.at(d)]; - return ScalarType(); + return VolumeScalarType(); }); } diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index 93aa2a27d7d..0eec196cd0d 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -4,6 +4,7 @@ #include #include #include +#include typedef CGAL::Linear_cell_complex_for_combinatorial_map<3, 3> LCC; @@ -13,13 +14,14 @@ int main() { std::vector v_scalars2, vol_scalars2; const std::string input_file = "data/beam-with-mixed-cells.vtk"; + assert(CGAL::IO::read_VTK(lcc1, input_file.c_str(), &v_scalars1, &vol_scalars1)); - // Build index maps std::unordered_map vertex_indices; std::size_t idx = 0; for(auto itv = lcc1.vertex_attributes().begin(), itvend = lcc1.vertex_attributes().end(); itv != itvend; ++itv) vertex_indices[itv] = idx++; + std::unordered_map volume_indices; idx = 0; for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; @@ -27,14 +29,16 @@ int main() { volume_indices[itvol] = idx++; const char* tmp_file = "tmp_test_lcc_vtk.vtk"; + assert(CGAL::IO::write_VTK( lcc1, tmp_file, - [&v_scalars1, &vertex_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { + [&v_scalars1, &vertex_indices](const LCC& lcc, LCC::Dart_const_descriptor d) -> float { return v_scalars1[vertex_indices.at(lcc.attribute<0>(d))]; }, - [&vol_scalars1, &volume_indices](const LCC& lcc, LCC::Dart_const_descriptor d) { + [&vol_scalars1, &volume_indices](const LCC& lcc, LCC::Dart_const_descriptor d) -> float { return vol_scalars1[volume_indices.at(d)]; })); + assert(CGAL::IO::read_VTK(lcc2, tmp_file, &v_scalars2, &vol_scalars2)); assert(lcc1.is_isomorphic_to(lcc2, false, true, true)); From cc19bd4a80735e95570c7506514dd90bbe76f62e Mon Sep 17 00:00:00 2001 From: ybellargui Date: Fri, 15 Aug 2025 13:58:24 +0200 Subject: [PATCH 05/30] Refine VTK I/O example and test --- .../linear_cell_complex_3_vtk_io.cpp | 18 ++--- .../Linear_cell_complex_vtk_io_test.cpp | 74 ++++++++++++------- 2 files changed, 55 insertions(+), 37 deletions(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index d1f8483fac9..710442385de 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -25,17 +25,17 @@ int main() // Compute per-volume vertex count std::vector volume_scalars; - for(auto it = lcc.template one_dart_per_cell<3>().begin(), - itend = lcc.template one_dart_per_cell<3>().end(); - it != itend; ++it) + for(auto it = lcc.template one_dart_per_cell<3>().begin(), + itend = lcc.template one_dart_per_cell<3>().end(); it != itend; ++it) { - volume_scalars.push_back( - std::distance( - lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).begin(), - lcc.template one_dart_per_incident_cell<0,3>(lcc.dart_descriptor(*it)).end() - ) - ); + auto d = lcc.dart_descriptor(*it); + std::size_t nbv = lcc.template one_dart_per_incident_cell<0,3>(d).size(); + volume_scalars.push_back(nbv); } + + if(!CGAL::IO::write_VTK(lcc, + "data/beam-with-mixed-cells.vtk", nullptr, &volume_scalars)) + return EXIT_FAILURE; // Write to VTK with explicit template parameters CGAL::IO::write_VTK( diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index 0eec196cd0d..6587b9e928b 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -1,8 +1,6 @@ #include #include #include -#include -#include #include #include @@ -10,40 +8,60 @@ typedef CGAL::Linear_cell_complex_for_combinatorial_map<3, 3> LCC; int main() { LCC lcc1, lcc2; - std::vector v_scalars1, vol_scalars1; - std::vector v_scalars2, vol_scalars2; + std::vector vertex_scalars1, vertex_scalars2; + std::vector volume_scalars1, volume_scalars2; + + const char* filename = "data/beam-with-mixed-cells.vtk"; - const std::string input_file = "data/beam-with-mixed-cells.vtk"; - assert(CGAL::IO::read_VTK(lcc1, input_file.c_str(), &v_scalars1, &vol_scalars1)); + bool ok_read1 = CGAL::IO::read_VTK(lcc1, filename, + &vertex_scalars1, &volume_scalars1); + assert(ok_read1); - std::unordered_map vertex_indices; - std::size_t idx = 0; + + std::size_t nb_vertices = 0; for(auto itv = lcc1.vertex_attributes().begin(), itvend = lcc1.vertex_attributes().end(); itv != itvend; ++itv) - vertex_indices[itv] = idx++; - - std::unordered_map volume_indices; - idx = 0; - for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; - ++itvol) - volume_indices[itvol] = idx++; + ++nb_vertices; + if(vertex_scalars1.size() != nb_vertices) { + vertex_scalars1.resize(nb_vertices); + for(std::size_t i=0;i(i); + } - const char* tmp_file = "tmp_test_lcc_vtk.vtk"; - assert(CGAL::IO::write_VTK( - lcc1, tmp_file, - [&v_scalars1, &vertex_indices](const LCC& lcc, LCC::Dart_const_descriptor d) -> float { - return v_scalars1[vertex_indices.at(lcc.attribute<0>(d))]; - }, - [&vol_scalars1, &volume_indices](const LCC& lcc, LCC::Dart_const_descriptor d) -> float { - return vol_scalars1[volume_indices.at(d)]; - })); + std::size_t nb_volumes = 0; + for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), + itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; ++itvol) + ++nb_volumes; + + if(volume_scalars1.size() != nb_volumes) { + volume_scalars1.clear(); + volume_scalars1.reserve(nb_volumes); + for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), + itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; ++itvol) { + auto d = lcc1.dart_descriptor(*itvol); + std::size_t nbv = lcc1.template one_dart_per_incident_cell<0,3>(d).size(); + volume_scalars1.push_back(nbv); + } + } + - assert(CGAL::IO::read_VTK(lcc2, tmp_file, &v_scalars2, &vol_scalars2)); + bool ok_write = CGAL::IO::write_VTK(lcc1, filename, + &vertex_scalars1, &volume_scalars1); + assert(ok_write); + + + bool ok_read2 = CGAL::IO::read_VTK(lcc2, filename, + &vertex_scalars2, &volume_scalars2); + assert(ok_read2); assert(lcc1.is_isomorphic_to(lcc2, false, true, true)); - - std::remove(tmp_file); + assert(vertex_scalars1.size() == vertex_scalars2.size()); + assert(volume_scalars1.size() == volume_scalars2.size()); + for(std::size_t i=0;i Date: Wed, 3 Sep 2025 12:46:19 +0200 Subject: [PATCH 06/30] Add prisms and pyramids creation --- .../include/CGAL/Combinatorial_map.h | 176 ++++++++++++++++++ .../include/CGAL/Linear_cell_complex_base.h | 141 +++++++++++++- 2 files changed, 310 insertions(+), 7 deletions(-) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index 59f88e34970..336b317f566 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -4019,6 +4019,182 @@ namespace CGAL { return make_combinatorial_hexahedron(d1, d2, d3, d4, d5, d6); } + /** Test if a volume is a combinatorial prism. + * @param adart an intial dart + * @return true iff the volume containing adart is a combinatorial prism. + */ + bool is_volume_combinatorial_prism(Dart_const_descriptor d1) const + { + Dart_const_descriptor d2=beta(d1, 2); + Dart_const_descriptor d3=beta(d1, 1, 2); + Dart_const_descriptor d4=beta(d1, 0, 2); + Dart_const_descriptor d5=beta(d2, 1, 1, 2); + + if ( d1==null_dart_descriptor || d2==null_dart_descriptor || + d3==null_dart_descriptor || d4==null_dart_descriptor || + d5==null_dart_descriptor ) { return false; } + + if (!is_face_combinatorial_polygon(d1, 3) || + !is_face_combinatorial_polygon(d2, 4) || + !is_face_combinatorial_polygon(d3, 4) || + !is_face_combinatorial_polygon(d4, 4) || + !is_face_combinatorial_polygon(d5, 3)) { return false; } + + // TODO do better with marks. + if (belong_to_same_cell<2,1>(d1, d2) || + belong_to_same_cell<2,1>(d1, d3) || + belong_to_same_cell<2,1>(d1, d4) || + belong_to_same_cell<2,1>(d1, d5) || + belong_to_same_cell<2,1>(d2, d3) || + belong_to_same_cell<2,1>(d2, d4) || + belong_to_same_cell<2,1>(d2, d5) || + belong_to_same_cell<2,1>(d3, d4) || + belong_to_same_cell<2,1>(d3, d5) || + belong_to_same_cell<2,1>(d4, d5)) + { return false; } + + if (beta(d2,0,2) !=beta(d3,1) || + beta(d2,1,2) !=beta(d4,0) || + beta(d3,0,2) !=beta(d4,1) || + beta(d3,1,1,2)!=beta(d5,0) || + beta(d4,1,1,2)!=beta(d5,1)) { return false; } + + return true; + } + + /** Create a combinatorial prism from 2 triangles and 3 squares. + * @param d1 a dart onto a first triangle. + * @param d2 a dart onto a first square. + * @param d3 a dart onto a second square. + * @param d4 a dart onto a thirth square. + * @param d5 a dart onto a second triangle. + * @return a new dart. + */ + Dart_descriptor make_combinatorial_prism(Dart_descriptor d1, + Dart_descriptor d2, + Dart_descriptor d3, + Dart_descriptor d4, + Dart_descriptor d5) + { + // 2-link for first triangle + basic_link_beta_for_involution(d1, d2, 2); + basic_link_beta_for_involution(beta(d1, 1), d3, 2); + basic_link_beta_for_involution(beta(d1, 0), d4, 2); + + // 2-link for quandrangles between them + basic_link_beta_for_involution(beta(d2, 0), beta(d3, 1), 2); + basic_link_beta_for_involution(beta(d2, 1), beta(d4, 0), 2); + basic_link_beta_for_involution(beta(d3, 0), beta(d4, 1), 2); + + // 2-link for second triangle + basic_link_beta_for_involution(beta(d2, 1, 1), d5, 2); + basic_link_beta_for_involution(beta(d3, 1, 1), beta(d5, 0), 2); + basic_link_beta_for_involution(beta(d4, 1, 1), beta(d5, 1), 2); + + return d1; + } + + /** Create a new combinatorial prism. + * @return a new dart. + */ + Dart_descriptor make_combinatorial_prism() + { + Dart_descriptor d1 = make_combinatorial_polygon(3); + Dart_descriptor d2 = make_combinatorial_polygon(4); + Dart_descriptor d3 = make_combinatorial_polygon(4); + Dart_descriptor d4 = make_combinatorial_polygon(4); + Dart_descriptor d5 = make_combinatorial_polygon(3); + + return make_combinatorial_prism( d1, d2, d3, d4, d5); + } + + /** Test if a volume is a combinatorial pyramid. + * @param adart an intial dart + * @return true iff the volume containing adart is a combinatorial pyramid. + */ + bool is_volume_combinatorial_pyramid(Dart_const_descriptor d1) const + { + Dart_const_descriptor d2=beta(d1, 2); + Dart_const_descriptor d3=beta(d1, 0, 2); + Dart_const_descriptor d4=beta(d1, 1, 1, 2); + Dart_const_descriptor d5=beta(d1, 1, 2); + + if (d1==null_dart_descriptor || d2==null_dart_descriptor || + d3==null_dart_descriptor || d4==null_dart_descriptor || + d5==null_dart_descriptor) { return false; } + + if (!is_face_combinatorial_polygon(d1, 4) || + !is_face_combinatorial_polygon(d2, 3) || + !is_face_combinatorial_polygon(d3, 3) || + !is_face_combinatorial_polygon(d4, 3) || + !is_face_combinatorial_polygon(d5, 3)) { return false; } + + // TODO do better with marks. + if (belong_to_same_cell<2,1>(d1, d2) || + belong_to_same_cell<2,1>(d1, d3) || + belong_to_same_cell<2,1>(d1, d4) || + belong_to_same_cell<2,1>(d1, d5) || + belong_to_same_cell<2,1>(d2, d3) || + belong_to_same_cell<2,1>(d2, d4) || + belong_to_same_cell<2,1>(d2, d5) || + belong_to_same_cell<2,1>(d3, d4) || + belong_to_same_cell<2,1>(d3, d5) || + belong_to_same_cell<2,1>(d4, d5)) + { return false; } + + if (beta(d2,1,2)!=beta(d3,0) || + beta(d2,0,2)!=beta(d5,1) || + beta(d5,0,2)!=beta(d4,1) || + beta(d4,0,2)!=beta(d3,1)) { return false; } + + return true; + } + + /** Create a combinatorial pyramid from 1 square and 4 triangles. + * @param d1 a dart onto the square. + * @param d2 a dart onto a first triangle. + * @param d3 a dart onto a second triangle. + * @param d4 a dart onto a thirth triangle. + * @param d5 a dart onto a fourth triangle. + * @return a new dart. + */ + Dart_descriptor make_combinatorial_pyramid(Dart_descriptor d1, + Dart_descriptor d2, + Dart_descriptor d3, + Dart_descriptor d4, + Dart_descriptor d5) + { + // 2-link for the square + basic_link_beta_for_involution(d1, d2, 2); + basic_link_beta_for_involution(beta(d1, 1), d5, 2); + basic_link_beta_for_involution(beta(d1, 1, 1), d4, 2); + basic_link_beta_for_involution(beta(d1, 0), d3, 2); + + // 2-link for first triangle + basic_link_beta_for_involution(beta(d2, 1), beta(d3, 0), 2); + basic_link_beta_for_involution(beta(d2, 0), beta(d5, 1), 2); + + // 2-link for triangles between them + basic_link_beta_for_involution(beta(d5, 0), beta(d4, 1), 2); + basic_link_beta_for_involution(beta(d4, 0), beta(d3, 1), 2); + + return d1; + } + + /** Create a new combinatorial pyramid. + * @return a new dart. + */ + Dart_descriptor make_combinatorial_pyramid() + { + Dart_descriptor d1=make_combinatorial_polygon(4); + Dart_descriptor d2=make_combinatorial_polygon(3); + Dart_descriptor d3=make_combinatorial_polygon(3); + Dart_descriptor d4=make_combinatorial_polygon(3); + Dart_descriptor d5=make_combinatorial_polygon(3); + + return make_combinatorial_pyramid(d1, d2, d3, d4, d5); + } + /** Test if an i-cell can be removed. * An i-cell can be removed if i==dimension or i==dimension-1, * or if there are at most two (i+1)-cell incident to it. diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h index b1943bca3c4..7b9dcec4f5e 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h @@ -660,13 +660,13 @@ namespace CGAL { * h0,h5 and to the facet (h0,h5,h6,h1). */ Dart_descriptor make_hexahedron(Vertex_attribute_descriptor h0, - Vertex_attribute_descriptor h1, - Vertex_attribute_descriptor h2, - Vertex_attribute_descriptor h3, - Vertex_attribute_descriptor h4, - Vertex_attribute_descriptor h5, - Vertex_attribute_descriptor h6, - Vertex_attribute_descriptor h7) + Vertex_attribute_descriptor h1, + Vertex_attribute_descriptor h2, + Vertex_attribute_descriptor h3, + Vertex_attribute_descriptor h4, + Vertex_attribute_descriptor h5, + Vertex_attribute_descriptor h6, + Vertex_attribute_descriptor h7) { Dart_descriptor d1 = make_quadrangle(h0, h5, h6, h1); Dart_descriptor d2 = make_quadrangle(h1, h6, h7, h2); @@ -717,6 +717,133 @@ namespace CGAL { create_vertex_attribute(p7)); } + /** Create an prism given 6 Vertex_attribute_descriptor. + * (6 vertices, 9 edges and 5 facets) + * \verbatim + * 3---4 + * |\ /| + * 0-5-1 + * \|/ + * 2 + * \endverbatim + * @param h0 the first vertex handle. + * @param h1 the second vertex handle. + * @param h2 the third vertex handle. + * @param h3 the fourth vertex handle. + * @param h4 the fifth vertex handle. + * @param h5 the sixth vertex handle. + * @return the dart of the new prism incident to h0 and to + * the facet (h0,h1,h2). + */ + Dart_descriptor make_prism(Vertex_attribute_descriptor h0, + Vertex_attribute_descriptor h1, + Vertex_attribute_descriptor h2, + Vertex_attribute_descriptor h3, + Vertex_attribute_descriptor h4, + Vertex_attribute_descriptor h5) + { + Dart_descriptor d1=make_triangle(h0, h1, h2); + Dart_descriptor d2=make_quadrangle(h1, h0, h3, h4); + Dart_descriptor d3=make_quadrangle(h2, h1, h4, h5); + Dart_descriptor d4=make_quadrangle(h0, h2, h5, h3); + Dart_descriptor d5=make_triangle(h4, h3, h5); + + return make_combinatorial_prism(d1, d2, d3, d4, d5); + } + + /** Create an prism given 6 points. + * \verbatim + * 3---4 + * |\ /| + * 0-5-1 + * \|/ + * 2 + * \endverbatim + * @param p0 the first point. + * @param p1 the second point. + * @param p2 the third point. + * @param p3 the fourth point. + * @param p4 the fifth point. + * @param p5 the sixth point. + * @return the dart of the new prism incident to p0 and to + * the facet (p0,p1,p2). + */ + Dart_descriptor make_prism(const Point& p0, + const Point& p1, + const Point& p2, + const Point& p3, + const Point& p4, + const Point& p5) + { + return make_prism(create_vertex_attribute(p0), + create_vertex_attribute(p1), + create_vertex_attribute(p2), + create_vertex_attribute(p3), + create_vertex_attribute(p4), + create_vertex_attribute(p5)); + } + + /** Create an pyramid given 5 Vertex_attribute_descriptor. + * (5 vertices, 8 edges and 5 facets) + * \verbatim + * 4 + * /|\ + * 0-|-1 + * | | | + * 3---2 + * \endverbatim + * @param h0 the first vertex handle. + * @param h1 the second vertex handle. + * @param h2 the third vertex handle. + * @param h3 the fourth vertex handle. + * @param h4 the fifth vertex handle. + * @return the dart of the new pyramid incident to h0 and to + * the facet (h0,h1,h2,h3). + */ + Dart_descriptor make_pyramid(Vertex_attribute_descriptor h0, + Vertex_attribute_descriptor h1, + Vertex_attribute_descriptor h2, + Vertex_attribute_descriptor h3, + Vertex_attribute_descriptor h4) + { + Dart_descriptor d1=make_quadrangle(h0, h1, h2, h3); + Dart_descriptor d2=make_triangle(h1, h0, h4); + Dart_descriptor d3=make_triangle(h0, h3, h4); + Dart_descriptor d4=make_triangle(h3, h2, h4); + Dart_descriptor d5=make_triangle(h2, h1, h4); + + return make_combinatorial_pyramid(d1, d2, d3, d4, d5); + } + + /** Create an pyramid given 5 points. + * \verbatim + * 4 + * /|\ + * 0-|-1 + * | | | + * 3---2 + * \endverbatim + * @param p0 the first point. + * @param p1 the second point. + * @param p2 the third point. + * @param p3 the fourth point. + * @param p4 the fifth point. + * @return the dart of the new pyramid incident to p0 and to + * the facet (p0,p1,p2,p3). + */ + Dart_descriptor make_pyramid(const Point& p0, + const Point& p1, + const Point& p2, + const Point& p3, + const Point& p4) + { + return make_pyramid(create_vertex_attribute(p0), + create_vertex_attribute(p1), + create_vertex_attribute(p2), + create_vertex_attribute(p3), + create_vertex_attribute(p4)); + } + /** Compute the barycenter of a given cell. * @param adart a dart incident to the cell. * @param adim the dimension of the cell. From 707375e7805df9186bcd71abff99172dce709249 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sun, 7 Sep 2025 09:34:49 +0200 Subject: [PATCH 07/30] Add method to test some volume topology. --- .../include/CGAL/Combinatorial_map.h | 179 ++++++++++++++++++ 1 file changed, 179 insertions(+) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index 336b317f566..e4839b37d4b 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -4195,6 +4195,185 @@ namespace CGAL { return make_combinatorial_pyramid(d1, d2, d3, d4, d5); } + /** Test if a volume is a combinatorial pentagonal prism. + * @param adart an initial dart + * @return true iff the volume containing adart is a combinatorial pentagonal prism. + */ + bool is_volume_combinatorial_pentagonal_prism(Dart_const_descriptor d1) const + { + Dart_const_descriptor d2=beta(d1, 2); + Dart_const_descriptor d3=beta(d1, 1, 2); + Dart_const_descriptor d4=beta(d1, 1, 1, 2); + Dart_const_descriptor d5=beta(d1, 0, 0, 2); + Dart_const_descriptor d6=beta(d1, 0, 2); + Dart_const_descriptor d7=beta(d2, 1, 1, 2); + + if (d1==null_dart_descriptor || d2==null_dart_descriptor || + d3==null_dart_descriptor || d4==null_dart_descriptor || + d5==null_dart_descriptor || d6==null_dart_descriptor || + d7==null_dart_descriptor) + { return false; } + + if (!is_face_combinatorial_polygon(d1, 5) || + !is_face_combinatorial_polygon(d2, 4) || + !is_face_combinatorial_polygon(d3, 4) || + !is_face_combinatorial_polygon(d4, 4) || + !is_face_combinatorial_polygon(d5, 4) || + !is_face_combinatorial_polygon(d6, 4) || + !is_face_combinatorial_polygon(d7, 5)) { return false; } + + // TODO do better with marks. + if (belong_to_same_cell<2,1>(d1, d2) || + belong_to_same_cell<2,1>(d1, d3) || + belong_to_same_cell<2,1>(d1, d4) || + belong_to_same_cell<2,1>(d1, d5) || + belong_to_same_cell<2,1>(d1, d6) || + belong_to_same_cell<2,1>(d1, d7) || + belong_to_same_cell<2,1>(d2, d3) || + belong_to_same_cell<2,1>(d2, d4) || + belong_to_same_cell<2,1>(d2, d5) || + belong_to_same_cell<2,1>(d2, d6) || + belong_to_same_cell<2,1>(d2, d7) || + belong_to_same_cell<2,1>(d3, d4) || + belong_to_same_cell<2,1>(d3, d5) || + belong_to_same_cell<2,1>(d3, d6) || + belong_to_same_cell<2,1>(d3, d7) || + belong_to_same_cell<2,1>(d4, d5) || + belong_to_same_cell<2,1>(d4, d6) || + belong_to_same_cell<2,1>(d4, d7) || + belong_to_same_cell<2,1>(d5, d6) || + belong_to_same_cell<2,1>(d5, d7) || + belong_to_same_cell<2,1>(d6, d7)) + { return false; } + + if (beta(d2,0,2) !=beta(d3,1) || + beta(d3,0,2) !=beta(d4,1) || + beta(d4,0,2) !=beta(d5,1) || + beta(d5,0,2) !=beta(d6,1) || + beta(d6,0,2) !=beta(d2,1) || + beta(d3,1,1,2)!=beta(d7,0) || + beta(d4,1,1,2)!=beta(d7,0,0) || + beta(d5,1,1,2)!=beta(d7,1,1) || + beta(d6,1,1,2)!=beta(d7,1)) { return false; } + + return true; + + } + + /** Test if a volume is a combinatorial hexagonal prism. + * @param adart an initial dart + * @return true iff the volume containing adart is a combinatorial hexagonal prism. + */ + bool is_volume_combinatorial_hexagonal_prism(Dart_const_descriptor d1) const + { + Dart_const_descriptor d2=beta(d1, 2); + Dart_const_descriptor d3=beta(d1, 1, 2); + Dart_const_descriptor d4=beta(d1, 1, 1, 2); + Dart_const_descriptor d5=beta(d1, 1, 1, 1, 2); + Dart_const_descriptor d6=beta(d1, 0, 0, 2); + Dart_const_descriptor d7=beta(d1, 0, 2); + Dart_const_descriptor d8=beta(d2, 1, 1, 2); + + if (d1==null_dart_descriptor || d2==null_dart_descriptor || + d3==null_dart_descriptor || d4==null_dart_descriptor || + d5==null_dart_descriptor || d6==null_dart_descriptor || + d7==null_dart_descriptor || d8==null_dart_descriptor) + { return false; } + + if (!is_face_combinatorial_polygon(d1, 6) || + !is_face_combinatorial_polygon(d2, 4) || + !is_face_combinatorial_polygon(d3, 4) || + !is_face_combinatorial_polygon(d4, 4) || + !is_face_combinatorial_polygon(d5, 4) || + !is_face_combinatorial_polygon(d6, 4) || + !is_face_combinatorial_polygon(d7, 4) || + !is_face_combinatorial_polygon(d8, 6)) { return false; } + + // TODO do better with marks. + if (belong_to_same_cell<2,1>(d1, d2) || + belong_to_same_cell<2,1>(d1, d3) || + belong_to_same_cell<2,1>(d1, d4) || + belong_to_same_cell<2,1>(d1, d5) || + belong_to_same_cell<2,1>(d1, d6) || + belong_to_same_cell<2,1>(d1, d7) || + belong_to_same_cell<2,1>(d1, d8) || + belong_to_same_cell<2,1>(d2, d3) || + belong_to_same_cell<2,1>(d2, d4) || + belong_to_same_cell<2,1>(d2, d5) || + belong_to_same_cell<2,1>(d2, d6) || + belong_to_same_cell<2,1>(d2, d7) || + belong_to_same_cell<2,1>(d2, d8) || + belong_to_same_cell<2,1>(d3, d4) || + belong_to_same_cell<2,1>(d3, d5) || + belong_to_same_cell<2,1>(d3, d6) || + belong_to_same_cell<2,1>(d3, d7) || + belong_to_same_cell<2,1>(d3, d8) || + belong_to_same_cell<2,1>(d4, d5) || + belong_to_same_cell<2,1>(d4, d6) || + belong_to_same_cell<2,1>(d4, d7) || + belong_to_same_cell<2,1>(d4, d8) || + belong_to_same_cell<2,1>(d5, d6) || + belong_to_same_cell<2,1>(d5, d7) || + belong_to_same_cell<2,1>(d5, d8) || + belong_to_same_cell<2,1>(d6, d7) || + belong_to_same_cell<2,1>(d6, d8) || + belong_to_same_cell<2,1>(d7, d8)) + { return false; } + + if (beta(d2,0,2) !=beta(d3,1) || + beta(d3,0,2) !=beta(d4,1) || + beta(d4,0,2) !=beta(d5,1) || + beta(d5,0,2) !=beta(d6,1) || + beta(d6,0,2) !=beta(d7,1) || + beta(d7,0,2) !=beta(d2,1) || + beta(d3,1,1,2)!=beta(d8,0) || + beta(d4,1,1,2)!=beta(d8,0,0) || + beta(d5,1,1,2)!=beta(d8,0,0,0) || + beta(d6,1,1,2)!=beta(d8,1,1) || + beta(d7,1,1,2)!=beta(d8,1)) { return false; } + + return true; + } + + /** Test if a volume is a combinatorial tetrahedron10. + * @param adart an initial dart + * @return true iff the volume containing adart is a combinatorial tetrahedron. + */ + bool is_volume_combinatorial_tetrahedron10(Dart_const_descriptor d1) const + { + Dart_const_descriptor d2=beta(d1, 2,0); + Dart_const_descriptor d3=beta(d2, 0,2); + Dart_const_descriptor d4=beta(d2, 1,1,1,2); + + if(d1==null_dart_descriptor || d2==null_dart_descriptor || + d3==null_dart_descriptor || d4==null_dart_descriptor) + { return false; } + + if(!is_face_combinatorial_polygon(d1, 6) || + !is_face_combinatorial_polygon(d2, 6) || + !is_face_combinatorial_polygon(d3, 6) || + !is_face_combinatorial_polygon(d4, 6)) { return false; } + + if(beta(d1, 1,2)!=beta(d1, 2,0) || + beta(d2, 1,2)!=beta(d2, 2,0) || + beta(d3, 1,2)!=beta(d3, 2,0) || + beta(d4, 1,2)!=beta(d4, 2,0)) { return false; } + + // TODO do better with marks (?). + if(belong_to_same_cell<2,1>(d1, d2) || + belong_to_same_cell<2,1>(d1, d3) || + belong_to_same_cell<2,1>(d1, d4) || + belong_to_same_cell<2,1>(d2, d3) || + belong_to_same_cell<2,1>(d2, d4) || + belong_to_same_cell<2,1>(d3, d4)) { return false; } + + if(beta(d1,1,1,2)!=beta(d3,0) || + beta(d1,0,2)!=beta(d4,1,1) || + beta(d4,0,2)!=beta(d3,1,1)) { return false; } + + return true; + } + /** Test if an i-cell can be removed. * An i-cell can be removed if i==dimension or i==dimension-1, * or if there are at most two (i+1)-cell incident to it. From 3382ac0d1807690e9cb193eeff38c7a90dfe7c30 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sun, 7 Sep 2025 09:50:04 +0200 Subject: [PATCH 08/30] Example for LCC write vtk --- .../linear_cell_complex_3_vtk_io.cpp | 42 +++++++------------ 1 file changed, 15 insertions(+), 27 deletions(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 710442385de..794f1aaa62a 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -2,10 +2,10 @@ \ingroup PkgLinearCellComplexExamples \brief Minimal example: read a `.3map` file, compute per-volume vertex count, and write to VTK. - This example loads a 3D linear cell complex from a `.3map` file using - \cgal function `CGAL::load_combinatorial_map()`. It computes for each - 3-cell (volume) the number of incident vertices (0-cells), stores these values - in a `std::vector`, and writes the result to a `.vtk` file with + This example loads a 3D linear cell complex from a `.3map` file using + \cgal function `CGAL::load_combinatorial_map()`. It computes for each + 3-cell (volume) the number of incident vertices (0-cells), stores these values + in a `std::vector`, and writes the result to a `.vtk` file with `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. */ @@ -13,37 +13,25 @@ #include #include #include -#include #include -typedef CGAL::Linear_cell_complex_for_combinatorial_map<3> LCC; - int main() { - LCC lcc; - CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); - + CGAL::Linear_cell_complex_for_combinatorial_map<3> lcc; + CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); + // Compute per-volume vertex count std::vector volume_scalars; - for(auto it = lcc.template one_dart_per_cell<3>().begin(), - itend = lcc.template one_dart_per_cell<3>().end(); it != itend; ++it) + for(auto it=lcc.template one_dart_per_cell<3>().begin(), + itend=lcc.template one_dart_per_cell<3>().end(); it!=itend; ++it) { - auto d = lcc.dart_descriptor(*it); - std::size_t nbv = lcc.template one_dart_per_incident_cell<0,3>(d).size(); + std::size_t nbv=lcc.template one_dart_per_incident_cell<0,3>(it).size(); volume_scalars.push_back(nbv); } - if(!CGAL::IO::write_VTK(lcc, - "data/beam-with-mixed-cells.vtk", nullptr, &volume_scalars)) - return EXIT_FAILURE; - - // Write to VTK with explicit template parameters - CGAL::IO::write_VTK( - lcc, - "data/beam-with-mixed-cells.vtk", - nullptr, - &volume_scalars - ); - + if(!CGAL::IO::write_VTK(lcc, "beam-with-mixed-cells.vtk", nullptr, + &volume_scalars)) + { return EXIT_FAILURE; } + return EXIT_SUCCESS; -} \ No newline at end of file +} From f25a684c95cefea794a5515633592b6ba7cdd7c6 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sun, 7 Sep 2025 09:55:49 +0200 Subject: [PATCH 09/30] Read / write vtk for lcc --- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 997 +++++++++--------- 1 file changed, 519 insertions(+), 478 deletions(-) diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index 11d3afcb46e..0a70ee38e22 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -11,8 +11,11 @@ #ifndef CGAL_LCC_IO_VTK_H #define CGAL_LCC_IO_VTK_H 1 + #include #include +#include + #include #include #include @@ -24,7 +27,8 @@ namespace CGAL { namespace IO { /** \file VTK.h - * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII format. + * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII + * format. * * Only supports: * - Linear_cell_complex_for_combinatorial_map<3,3> @@ -47,7 +51,8 @@ namespace IO { // ============================================================================ /** - * \brief Read a VTK legacy ASCII file and load it into a 3D Linear_cell_complex. + * \brief Read a VTK legacy ASCII file and load it into a 3D + * Linear_cell_complex. * \ingroup PkgLinearCellComplexExamples * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> @@ -61,11 +66,12 @@ namespace IO { * If provided, will be resized to match number of volumes. * \return `true` if loading was successful, `false` otherwise */ -template +template bool read_VTK(LCC& alcc, const char* filename, - std::vector* vertex_scalars = nullptr, - std::vector* volume_scalars = nullptr); + std::vector* vertex_scalars, + std::vector* volume_scalars); /** * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. @@ -82,208 +88,205 @@ bool read_VTK(LCC& alcc, * same size as number of 3-cells in the LCC. * \return `true` if writing was successful, `false` otherwise */ -template +template bool write_VTK(const LCC& alcc, const char* filename, - const std::vector* vertex_scalars = nullptr, - const std::vector* volume_scalars = nullptr); - -// Advanced versions with functors -template -bool read_VTK(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader); + const std::vector* vertex_scalars, + const std::vector* volume_scalars); +// "Advanced" versions with functors template -bool write_VTK(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval); +bool write_VTK_with_fct(const LCC& alcc, const char* filename, + PointFunctor ptval, CellFunctor cellval); // ============================================================================ // Implementation details // ============================================================================ -namespace internal { +namespace internal +{ + ///////////////////////////////////////////////////////////////////////////// + // VTK type name mapping + // bit, unsigned_char, char, unsigned_short, short, unsigned_int, int, + // unsigned_long, long, float, double. + template + struct gettype + { static std::string name() { return "unknown"; }}; + template<> + struct gettype + { static std::string name() { return "bit"; }}; + template<> + struct gettype + { static std::string name() { return "unsigned_char"; }}; + template<> + struct gettype + { static std::string name() { return "char"; }}; + template<> + struct gettype + { static std::string name() { return "unsigned_short"; }}; + template<> + struct gettype + { static std::string name() { return "short"; }}; + template<> + struct gettype + { static std::string name() { return "unsigned_int"; }}; + template<> + struct gettype + { static std::string name() { return "int"; }}; + template<> + struct gettype + { static std::string name() { return "unsigned_long"; }}; + template<> + struct gettype + { static std::string name() { return "long"; }}; + template<> + struct gettype + { static std::string name() { return "float"; }}; + template<> + struct gettype + { static std::string name() { return "double"; }}; + ///////////////////////////////////////////////////////////////////////////// + // VTK cell type constants + enum VTK_Cell_Type + { + VTK_TETRA = 10, + VTK_VOXEL = 11, + VTK_HEXAHEDRON = 12, + VTK_WEDGE = 13, // Prism + VTK_PYRAMID = 14, + VTK_PENTAGONAL_PRISM = 15, + VTK_HEXAGONAL_PRISM = 16, + VTK_POLYHEDRON = 42 // Generic cell + }; + ///////////////////////////////////////////////////////////////////////////// + /// Write cell_data. + template + struct Write_cell_data + { + /// nb is the number of cells, + /// fct is a function having 3 parameters: a lcc, a dart_descriptor, + /// an the index of the cell. + template + static void run(std::ofstream& fo, LCC& lcc, std::size_t nb, FCT fct) + { + fo<<"CELL_DATA "<::name() + <<" 1"<().begin(), + itvolend=lcc.template one_dart_per_cell<3>().end(); + itvol!=itvolend; ++itvol, ++i) + { fo< + struct Write_cell_data + { + template + static void run(std::ofstream&, LCC&, std::size_t, std::nullptr_t) + {} + }; + ///////////////////////////////////////////////////////////////////////////// + /// Write point_data. + template + struct Write_point_data + { + /// nb is the number of cells, + /// fct is a function having 3 parameters: a lcc, a dart_descriptor, + /// an the index of the cell. + template + static void run(std::ofstream& fo, LCC& lcc, std::size_t nb, FCT fct) + { + fo<<"POINT_DATA "<::name() + <<" 1"<(itv), i)< + struct Write_point_data + { + template + static void run(std::ofstream&, LCC&, std::size_t, std::nullptr_t) + {} + }; + ///////////////////////////////////////////////////////////////////////////// + // Read data, stored values as T. + template + bool read_data(std::istream& fi, std::string& line, std::vector& data) + { + std::string txt, data_type; + std::size_t nb; + std::istringstream inputline(line); + inputline>>txt>>nb; // "CELL_DATA xxx" + fi>>txt>>txt; // "SCALARS cell_scalars " + fi>>data_type>>txt; // type for data + fi>>txt>>txt; // "LOOKUP_TABLE default" + if(!fi.good()) + { return false; } + data.clear(); + data.reserve(nb); + for(std::size_t i=0; i>txt)) + { return false; } -// Helper: read a scalar of the right type from stream -template -bool read_scalar_by_vtk_type(std::istream& is, const std::string& vtk_type, std::size_t n, Functor f) { - if(vtk_type == "float") { - for(std::size_t i = 0; i < n; ++i) { - float v; - if(!(is >> v)) - return false; - f(i, v); + std::stringstream ss{txt}; + T t; + ss>>t; + + data.push_back(t); } - } else if(vtk_type == "double") { - for(std::size_t i = 0; i < n; ++i) { - double v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "int") { - for(std::size_t i = 0; i < n; ++i) { - int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "unsigned_int") { - for(std::size_t i = 0; i < n; ++i) { - unsigned int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "short") { - for(std::size_t i = 0; i < n; ++i) { - short int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "unsigned_short") { - for(std::size_t i = 0; i < n; ++i) { - unsigned short int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "char") { - for(std::size_t i = 0; i < n; ++i) { - char v; - int tmp; - if(!(is >> tmp)) - return false; - v = static_cast(tmp); - f(i, v); - } - } else if(vtk_type == "unsigned_char") { - for(std::size_t i = 0; i < n; ++i) { - unsigned char v; - int tmp; - if(!(is >> tmp)) - return false; - v = static_cast(tmp); - f(i, v); - } - } else if(vtk_type == "long") { - for(std::size_t i = 0; i < n; ++i) { - long int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else if(vtk_type == "unsigned_long") { - for(std::size_t i = 0; i < n; ++i) { - unsigned long int v; - if(!(is >> v)) - return false; - f(i, v); - } - } else { - std::cerr << "[ERROR] read_VTK: unsupported scalar type: " << vtk_type << std::endl; - return false; + return true; } - return true; -} - -// VTK type name mapping -template struct gettype + ///////////////////////////////////////////////////////////////////////////// + // Helper: detect VTK cell type from a 3-cell + template + VTK_Cell_Type get_vtk_cell_type(const LCC& lcc, + typename LCC::Dart_const_descriptor itvol, + typename LCC::Dart_const_descriptor& sd) + { + using namespace CGAL::CMap::Element_topo; + cell_topo vol_type=get_cell_topo<3>(lcc, itvol, sd); + switch(vol_type) + { + case TETRAHEDRON: return VTK_TETRA; + case PYRAMID: return VTK_PYRAMID; + case PRISM: return VTK_WEDGE; + case HEXAHEDRON: return VTK_HEXAHEDRON; + // case PENTAGONAL_PRISM: return VTK_PENTAGONAL_PRISM; + // case HEXAGONAL_PRISM: return VTK_HEXAGONAL_PRISM; + // 24 QUADRATIC_TETRA + // 25 QUADRATIC_HEXAHEDRON + // 26 QUADRATIC_WEDGE + // 27 QUADRATIC_PYRAMID + default: break; + } + return VTK_POLYHEDRON; + } + ///////////////////////////////////////////////////////////////////////////// +template +bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, + std::vector* vertex_scalars=nullptr, + std::vector* cell_scalars=nullptr) { - static std::string name() { return "unknown"; } -}; -template <> struct gettype -{ - static std::string name() { return "bit"; } -}; -template <> struct gettype -{ - static std::string name() { return "unsigned_char"; } -}; -template <> struct gettype -{ - static std::string name() { return "char"; } -}; -template <> struct gettype -{ - static std::string name() { return "unsigned_short"; } -}; -template <> struct gettype -{ - static std::string name() { return "short"; } -}; -template <> struct gettype -{ - static std::string name() { return "unsigned_int"; } -}; -template <> struct gettype -{ - static std::string name() { return "int"; } -}; -template <> struct gettype -{ - static std::string name() { return "unsigned_long"; } -}; -template <> struct gettype -{ - static std::string name() { return "long"; } -}; -template <> struct gettype -{ - static std::string name() { return "float"; } -}; -template <> struct gettype -{ - static std::string name() { return "double"; } -}; - -// VTK cell type constants -enum VTK_Cell_Type { - VTK_TETRA = 10, - VTK_VOXEL = 11, - VTK_HEXAHEDRON = 12, - VTK_WEDGE = 13, - VTK_PYRAMID = 14, - VTK_PENTAGONAL_PRISM = 15, - VTK_HEXAGONAL_PRISM = 16, - VTK_POLYHEDRON = 42 -}; - -// Helper: detect VTK cell type from a 3-cell -template inline VTK_Cell_Type get_vtk_cell_type(const LCC& lcc, Dart itvol) { - // Heuristic: count number of vertices and faces - std::size_t nbv = 0, nbf = 0; - for(auto itv = lcc.template one_dart_per_incident_cell<0, 3>(itvol).begin(), - itvend = lcc.template one_dart_per_incident_cell<0, 3>(itvol).end(); - itv != itvend; ++itv) - ++nbv; - for(auto itf = lcc.template one_dart_per_incident_cell<2, 3>(itvol).begin(), - itfend = lcc.template one_dart_per_incident_cell<2, 3>(itvol).end(); - itf != itfend; ++itf) - ++nbf; - - if(nbv == 4 && nbf == 4) - return VTK_TETRA; - if(nbv == 5 && nbf == 5) - return VTK_PYRAMID; - if(nbv == 6 && nbf == 5) - return VTK_WEDGE; - if(nbv == 8 && nbf == 6) - return VTK_HEXAHEDRON; - if(nbv == 10 && nbf == 7) - return VTK_PENTAGONAL_PRISM; - if(nbv == 12 && nbf == 8) - return VTK_HEXAGONAL_PRISM; - return VTK_POLYHEDRON; -} - -template -bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { - static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, + static_assert(LCC::dimension==3 && LCC::ambient_dimension==3, "read_VTK() only supports 3D Linear_cell_complexes (3,3)"); - using Point = typename LCC::Point; - using FT = typename LCC::FT; - - alcc.clear(); + using Point=typename LCC::Point; + using FT=typename LCC::FT; Linear_cell_complex_incremental_builder_3 ib(alcc); @@ -291,297 +294,295 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, VertexScalarReader ver std::size_t npoints, ncells; // Skip to POINTS section - while(std::getline(is, line)) { - if(line.find("POINTS") != std::string::npos) - break; - } - if(is.eof()) { - std::cerr << "[ERROR] read_VTK: POINTS section not found" << std::endl; + while(std::getline(is, line) && line.find("POINTS")==std::string::npos) + {} + if(is.eof()) + { + std::cerr<<"[ERROR] read_VTK: POINTS section not found"<> npoints; + ss>>npoints; // Read points std::vector points(npoints); - for(std::size_t i = 0; i < npoints; ++i) { + for(std::size_t i=0; i> x >> y >> z)) { - std::cerr << "[ERROR] read_VTK: failed to read point " << i << std::endl; + if(!(is>>x>>y>>z)) + { + std::cerr<<"[ERROR] read_VTK: failed to read point "<> ncells; + ss>>ncells; // Read connectivity std::vector> faces(ncells); std::size_t points_per_cell; - for(std::size_t i = 0; i < ncells; ++i) { - if(!(is >> points_per_cell)) { - std::cerr << "[ERROR] read_VTK: failed to read cell " << i << std::endl; + for(std::size_t i=0; i>points_per_cell)) + { + std::cerr<<"[ERROR] read_VTK: failed to read cell "<> faces[i][j])) { - std::cerr << "[ERROR] read_VTK: failed to read cell " << i << " vertex " << j << std::endl; + for(std::size_t j=0; j>faces[i][j])) + { + std::cerr<<"[ERROR] read_VTK: failed to read cell "<> cell_type)) { - std::cerr << "[ERROR] read_VTK: failed to read cell type " << i << std::endl; + for(std::size_t i = 0; i>cell_type)) + { + std::cerr<<"[ERROR] read_VTK: failed to read cell type "<(itv) == alcc.null_descriptor) { - alcc.erase_vertex_attribute(itv); - } else { - ++itv; - } + for(auto itv=alcc.vertex_attributes().begin(); + itv!=alcc.vertex_attributes().end(); ++itv) + { + if(alcc.template dart_of_attribute<0>(itv)==alcc.null_descriptor) + { alcc.erase_vertex_attribute(itv); } } - // Read POINT_DATA scalars if present - while(std::getline(is, line)) { - if(line.find("POINT_DATA") != std::string::npos) { - std::size_t ndata; - ss = std::stringstream(line); - std::getline(ss, tmp, ' '); // skip "POINT_DATA" - ss >> ndata; - - std::getline(is, line); // SCALARS line - std::stringstream scalars_line(line); - std::string scalars, name, vtk_type; - scalars_line >> scalars >> name >> vtk_type; - - std::getline(is, line); // LOOKUP_TABLE line - - if(!read_scalar_by_vtk_type(is, vtk_type, ndata, vertex_reader)) { - std::cerr << "[ERROR] read_VTK: failed to read POINT_DATA" << std::endl; + while(std::getline(is, line)) + { + // Read POINT_DATA scalars if present + if(vertex_scalars!=nullptr && line.find("POINT_DATA")!=std::string::npos) + { + if(!read_data(is, line, *vertex_scalars)) + { + std::cerr<<"[ERROR] read_VTK: error when reading POINT_DATA." + <> ndata; - - std::getline(is, line); // SCALARS line - std::stringstream scalars_line(line); - std::string scalars, name, vtk_type; - scalars_line >> scalars >> name >> vtk_type; - - std::getline(is, line); // LOOKUP_TABLE line - - if(!read_scalar_by_vtk_type(is, vtk_type, ndata, cell_reader)) { - std::cerr << "[ERROR] read_VTK: failed to read CELL_DATA" << std::endl; + // Read CELL_DATA scalars if present + else if(cell_scalars!=nullptr && line.find("CELL_DATA")!=std::string::npos) + { + if(!read_data(is, line, *cell_scalars)) + { + std::cerr<<"[ERROR] read_VTK: error when reading CELL_DATA." + < -bool write_lcc_to_vtk_ascii(std::ostream& os, const LCC& alcc, PointFunctor ptval, CellFunctor cellval) { - static_assert(LCC::dimension == 3 && LCC::ambient_dimension == 3, +///////////////////////////////////////////////////////////////////////////// +template +bool write_lcc_topo_to_vtk_ascii(std::ostream& os, const LCC& alcc, + std::size_t& nbpts, std::size_t& nbcells) +{ + static_assert(LCC::dimension==3 && LCC::ambient_dimension==3, "write_VTK() only supports 3D Linear_cell_complexes (3,3)"); // Write VTK header - os << "# vtk DataFile Version 2.0\n"; - os << "CGAL Linear_cell_complex\n"; - os << "ASCII\n"; - os << "DATASET UNSTRUCTURED_GRID\n\n"; + os<<"# vtk DataFile Version 2.0\n"; + os<<"CGAL Linear_cell_complex\n"; + os<<"ASCII\n"; + os<<"DATASET UNSTRUCTURED_GRID\n\n"; - // Build vertex index map - std::unordered_map vertex_index; - std::size_t nbpts = 0; - - for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { - vertex_index[itv] = nbpts++; + // Build vertex index map and write points + std::unordered_map + index; + nbpts=0; + os<<"POINTS "<point()<point(); - os << p.x() << " " << p.y() << " " << p.z() << "\n"; - } - os << "\n"; + os<().begin(), itvolend = alcc.template one_dart_per_cell<3>().end(); - itvol != itvolend; ++itvol) - { - ++nbcells; - VTK_Cell_Type cell_type = get_vtk_cell_type(alcc, itvol); - type_stream << static_cast(cell_type) << "\n"; - - if(cell_type == VTK_POLYHEDRON) { - // Generic polyhedron format write as face-vertex connectivity - std::vector> faces; - std::size_t cell_size = 1; // Start with 1 for number of faces - - for(auto itface = alcc.template one_dart_per_incident_cell<2, 3>(itvol).begin(), - itfaceend = alcc.template one_dart_per_incident_cell<2, 3>(itvol).end(); - itface != itfaceend; ++itface) - { - faces.push_back(std::vector()); - auto& face = faces.back(); - - for(auto itvert = alcc.template darts_of_orbit<1>(itface).begin(), - itvertend = alcc.template darts_of_orbit<1>(itface).end(); - itvert != itvertend; ++itvert) - { - face.push_back(vertex_index[alcc.vertex_attribute(itvert)]); - } - cell_size += face.size() + 1; // +1 for face size - } - - cell_stream << cell_size << " " << faces.size(); - for(const auto& face : faces) { - cell_stream << " " << face.size(); - for(auto v : face) { - cell_stream << " " << v; - } - } - cell_stream << "\n"; - total_size += cell_size + 1; // +1 for cell size - - } else { - // Standard cell types write vertex connectivity directly - std::vector vertices; - - for(auto itvert = alcc.template one_dart_per_incident_cell<0, 3>(itvol).begin(), - itvertend = alcc.template one_dart_per_incident_cell<0, 3>(itvol).end(); - itvert != itvertend; ++itvert) - { - vertices.push_back(vertex_index[alcc.vertex_attribute(itvert)]); - } - - cell_stream << vertices.size(); - for(auto v : vertices) { - cell_stream << " " << v; - } - cell_stream << "\n"; - total_size += vertices.size() + 1; - } - } + nbcells=0; + std::size_t total_size=0; + std::ostringstream cell_stream, type_stream; + typename LCC::Dart_const_descriptor sd; // Write cells section - os << "CELLS " << nbcells << " " << total_size << "\n"; - os << cell_stream.str(); - os << "\n"; + for(typename LCC::template One_dart_per_cell_range<3>::const_iterator + itvol=alcc.template one_dart_per_cell<3>().begin(), + itvolend=alcc.template one_dart_per_cell<3>().end(); + itvol!=itvolend; ++itvol) + { + ++nbcells; + ++total_size; // for the number of vertices + VTK_Cell_Type cell_type=get_vtk_cell_type(alcc, itvol, sd); + type_stream<(cell_type)<(sd))]<<" " + <(sd))]<<" " + <(sd))]<(sd))]<<" " + <(sd))]<<" " + <(sd))]<<" " + <(sd))]<(sd))]<<" " + <(sd))]<<" "; + // Move to the up face + typename LCC::Dart_const_descriptor d2=alcc.template beta<2, 1, 1, 2>(sd); + cell_stream<(d2))]<<" " + <(d2))]<(sd); + } + typename LCC::Dart_const_descriptor d2=alcc.template beta<2, 1, 1, 2, 1>(sd); + // Darts associated with particles 4, 5, 6, 7 + for(unsigned int i = 0; i < 4; i++) + { + cell_stream<(d2); + } + cell_stream<> faces; + std::size_t cell_size=1; // Start with 1 for number of faces + ++total_size; // for the same reason + for(auto itface=alcc.template one_dart_per_incident_cell<2, 3, 2>(itvol).begin(), + itfaceend=alcc.template one_dart_per_incident_cell<2, 3, 2>(itvol).end(); + itface!=itfaceend; ++itface) + { + faces.push_back(std::vector()); + typename LCC::Dart_const_descriptor curdh=itface; + do + { + faces.back().push_back(index[alcc.vertex_attribute(curdh)]); + curdh=alcc.template beta<1>(curdh); + } + while(curdh!=itface); + cell_size+=faces.back().size()+1; // +1 for the number of vertices in the face + } + cell_stream<) { - os << "POINT_DATA " << nbpts << "\n"; - os << "SCALARS vertex_scalars " << gettype::name() << " 1\n"; - os << "LOOKUP_TABLE default\n"; - for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) { - auto dart = alcc.template dart_of_attribute<0>(itv); - CGAL_assertion(dart != alcc.null_dart_descriptor); - os << ptval(alcc, dart) << "\n"; - } - } - - // Write cell scalars if cellval is not nullptr/pointer - if constexpr(!std::is_same_v && !std::is_pointer_v) { - os << "CELL_DATA " << nbcells << "\n"; - os << "SCALARS volume_scalars " << gettype::name() << " 1\n"; - os << "LOOKUP_TABLE default\n"; - for(auto itvol = alcc.template one_dart_per_cell<3>().begin(), - itvolend = alcc.template one_dart_per_cell<3>().end(); - itvol != itvolend; ++itvol) - { - os << cellval(alcc, itvol) << "\n"; - } - } + os<<"CELL_TYPES "< -inline bool read_VTK(LCC& alcc, const char* filename, VertexScalarReader vertex_reader, CellScalarReader cell_reader) { - CGAL_assertion(filename != nullptr); - std::ifstream file(filename); - if(!file.is_open()) { - std::cerr << "[ERROR] read_VTK: cannot open file " << filename << std::endl; - return false; - } - return internal::read_lcc_from_vtk_ascii(file, alcc, vertex_reader, cell_reader); -} - -template -inline bool write_VTK(const LCC& alcc, const char* filename, PointFunctor ptval, CellFunctor cellval) { - CGAL_assertion(filename != nullptr); - std::ofstream file(filename); - if(!file.is_open()) { - std::cerr << "[ERROR] write_VTK: cannot open file " << filename << std::endl; - return false; - } - return internal::write_lcc_to_vtk_ascii(file, alcc, ptval, cellval); -} - -// Vector-based versions (convenience wrappers) +//////////////////////////////////////////////////////////////////////////////////// template -inline bool read_VTK(LCC& alcc, +bool read_VTK(LCC& alcc, const char* filename, std::vector* vertex_scalars, - std::vector* volume_scalars) { - auto v_writer = [&](std::size_t i, auto val) { - if(vertex_scalars) { - if(vertex_scalars->size() <= i) - vertex_scalars->resize(i + 1); - (*vertex_scalars)[i] = static_cast(val); - } - }; - auto c_writer = [&](std::size_t i, auto val) { - if(volume_scalars) { - if(volume_scalars->size() <= i) - volume_scalars->resize(i + 1); - (*volume_scalars)[i] = static_cast(val); - } - }; - return read_VTK(alcc, filename, v_writer, c_writer); + std::vector* volume_scalars) +{ + CGAL_assertion(filename!=nullptr); + std::ifstream file(filename); + if(!file.is_open()) + { + std::cerr<<"[ERROR] read_VTK: cannot open file "< +bool read_VTK(LCC& alcc, + const char* filename) +{ return read_VTK + (alcc, filename, nullptr, nullptr); } + +template +bool read_VTK(LCC& alcc, + const char* filename, + std::vector* vertex_scalars) +{ return read_VTK + (alcc, filename, vertex_scalars, nullptr); } + +template +bool read_VTK(LCC& alcc, + const char* filename, + std::nullptr_t, + std::vector* volume_scalars) +{ return read_VTK + (alcc, filename, nullptr, volume_scalars); } +//////////////////////////////////////////////////////////////////////////////////// +template +inline bool write_VTK_with_fct(const LCC& alcc, const char* filename, + PointFunctor pointfct, CellFunctor cellfct) +{ + CGAL_assertion(filename!=nullptr); + std::ofstream file(filename); + if(!file.good()) + { + std::cerr<<"[ERROR] write_VTK: cannot open file "<:: + run(file, alcc, nbpts, pointfct); } + if(cellfct) + { internal::Write_cell_data:: + run(file, alcc, nbcells, cellfct); } + } + file.close(); + return true; +} +//////////////////////////////////////////////////////////////////////////////////// template -inline bool write_VTK(const LCC& alcc, - const char* filename, +bool write_VTK(const LCC& alcc, const char* filename, const std::vector* vertex_scalars, - const std::vector* volume_scalars) { - // Build index maps - std::unordered_map vertex_indices; - std::size_t idx = 0; - for(auto itv = alcc.vertex_attributes().begin(), itvend = alcc.vertex_attributes().end(); itv != itvend; ++itv) - vertex_indices[itv] = idx++; + const std::vector* volume_scalars) +{ + std::function vertexfct; + std::function cellfct; + if(vertex_scalars!=nullptr) + { + vertexfct=[&vertex_scalars](const LCC&, typename LCC::Dart_const_descriptor, + std::size_t i) -> VertexScalarType + { return (*vertex_scalars)[i]; }; + } - std::unordered_map volume_indices; - idx = 0; - for(auto itvol = alcc.template one_dart_per_cell<3>().begin(), itvolend = alcc.template one_dart_per_cell<3>().end(); - itvol != itvolend; ++itvol) - volume_indices[itvol] = idx++; + if(volume_scalars!=nullptr) + { + cellfct=[&volume_scalars](const LCC&, typename LCC::Dart_const_descriptor, + std::size_t i) -> VolumeScalarType + { return (*volume_scalars)[i]; }; + } - return write_VTK( - alcc, filename, - [vertex_scalars, &vertex_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> VertexScalarType { - if(vertex_scalars) - return (*vertex_scalars)[vertex_indices.at(lcc.template attribute<0>(d))]; - return VertexScalarType(); - }, - [volume_scalars, &volume_indices](const LCC& lcc, typename LCC::Dart_const_descriptor d) -> VolumeScalarType { - if(volume_scalars) - return (*volume_scalars)[volume_indices.at(d)]; - return VolumeScalarType(); - }); + return write_VTK_with_fct(alcc, filename, vertexfct, cellfct); } +template +bool write_VTK(const LCC& alcc, const char* filename) +{ + return write_VTK(alcc, filename, nullptr, nullptr); +} + +template +bool write_VTK(const LCC& alcc, const char* filename, + const std::vector* vertex_scalars) +{ + return write_VTK(alcc, filename, vertex_scalars, + nullptr); +} + +template +bool write_VTK(const LCC& alcc, const char* filename, + std::nullptr_t, + const std::vector* volume_scalars) +{ + return write_VTK(alcc, filename, nullptr, + volume_scalars); +} +//////////////////////////////////////////////////////////////////////////////////// + } // namespace IO } // namespace CGAL -#endif // CGAL_LCC_IO_VTK_H \ No newline at end of file +#endif // CGAL_LCC_IO_VTK_H From 8ebeb1389677ae07696aaeb832eb46d236e4095a Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sun, 7 Sep 2025 09:57:36 +0200 Subject: [PATCH 10/30] Creation of prisms and pyramids are now members of cmap and lcc --- .../LCC_3_incremental_builder_test.cpp | 98 ------------------- 1 file changed, 98 deletions(-) diff --git a/Linear_cell_complex/test/Linear_cell_complex/LCC_3_incremental_builder_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/LCC_3_incremental_builder_test.cpp index 03d6bf55922..32e4336bc03 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/LCC_3_incremental_builder_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/LCC_3_incremental_builder_test.cpp @@ -5,104 +5,6 @@ #include "Linear_cell_complex_3_test.h" -/////////////////////////////////////////////////////////////////////////////// -/* 3 - * /|\ - * 0-|-2 - * \|/ - * 1 - */ -template -void make_tetrahedron_with_builder(IncrementalBuilder& ib, - std::size_t i0, - std::size_t i1, - std::size_t i2, - std::size_t i3) -{ - ib.begin_surface(); - ib.add_facet({i0,i1,i2}); - ib.add_facet({i1,i0,i3}); - ib.add_facet({i2,i1,i3}); - ib.add_facet({i0,i2,i3}); - ib.end_surface(); -} -/////////////////////////////////////////////////////////////////////////////// -/* 4 - * /|\ - * 0-|-3 - * | | | - * 1---2 - */ -template -void make_pyramid_with_builder(IncrementalBuilder& ib, - std::size_t i0, - std::size_t i1, - std::size_t i2, - std::size_t i3, - std::size_t i4) -{ - ib.begin_surface(); - ib.add_facet({i0,i1,i2,i3}); - ib.add_facet({i1,i0,i4}); - ib.add_facet({i2,i1,i4}); - ib.add_facet({i3,i2,i4}); - ib.add_facet({i0,i3,i4}); - ib.end_surface(); -} -/////////////////////////////////////////////////////////////////////////////// -/* 3 - * /|\ - * 4---5 - * | | | - * | 0 | - * |/ \| - * 1---2 - */ -template -void make_prism_with_builder(IncrementalBuilder& ib, - std::size_t i0, - std::size_t i1, - std::size_t i2, - std::size_t i3, - std::size_t i4, - std::size_t i5) -{ - ib.begin_surface(); - ib.add_facet({i0,i1,i2}); - ib.add_facet({i1,i0,i3,i4}); - ib.add_facet({i2,i1,i4,i5}); - ib.add_facet({i0,i2,i5,i3}); - ib.add_facet({i5,i4,i3}); - ib.end_surface(); -} -/////////////////////////////////////////////////////////////////////////////// -/* 7----6 - * /| /| - * 4----5 | - * | 3--|-2 - * |/ |/ - * 0----1 - */ -template -void make_hexahedron_with_builder(IncrementalBuilder& ib, - std::size_t i0, - std::size_t i1, - std::size_t i2, - std::size_t i3, - std::size_t i4, - std::size_t i5, - std::size_t i6, - std::size_t i7) -{ - ib.begin_surface(); - ib.add_facet({i0,i1,i2,i3}); - ib.add_facet({i1,i0,i4,i5}); - ib.add_facet({i2,i1,i5,i6}); - ib.add_facet({i3,i2,i6,i7}); - ib.add_facet({i0,i3,i7,i4}); - ib.add_facet({i7,i6,i5,i4}); - ib.end_surface(); -} /////////////////////////////////////////////////////////////////////////////// template bool test_ib(const char* filename) From 876db072d83b5eac741fade7dff3d44f45aaeda0 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sun, 7 Sep 2025 10:02:14 +0200 Subject: [PATCH 11/30] LCC: compute topology of volumes --- Combinatorial_map/include/CGAL/Element_topo.h | 208 ++++++++++++++++++ 1 file changed, 208 insertions(+) create mode 100644 Combinatorial_map/include/CGAL/Element_topo.h diff --git a/Combinatorial_map/include/CGAL/Element_topo.h b/Combinatorial_map/include/CGAL/Element_topo.h new file mode 100644 index 00000000000..4ef5d0c1776 --- /dev/null +++ b/Combinatorial_map/include/CGAL/Element_topo.h @@ -0,0 +1,208 @@ +// Copyright (c) 2025 CNRS and LIRIS' Establishments (France). +// All rights reserved. +// +// This file is part of CGAL (www.cgal.org) +// +// $URL$ +// $Id$ +// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial +// +// Author(s) : Guillaume Damiand +// +//////////////////////////////////////////////////////////////////////////////// +#ifndef CMAP_ELEMENT_TOPO_H +#define CMAP_ELEMENT_TOPO_H + +#include + +namespace CGAL { + namespace CMap { + namespace Element_topo { + +enum cell_topo + { + SQUARE=0, + TRIANGLE=1, + HEXAHEDRON=2, + TETRAHEDRON=3, + PRISM=4, + PYRAMID=5, + GENERIC_2D=6, + GENERIC_3D=7, + EDGE=8, + TETRAHEDRON10=9, + PENTAGONAL_PRISM=10, + HEXAGONAL_PRISM=11, + NO_TYPE=-1 + }; + +inline +std::string topo_name(cell_topo t) +{ + switch(t) + { + case SQUARE: return "SQUARE"; + case TRIANGLE: return "TRIANGLE"; + case HEXAHEDRON: return "HEXAHEDRON"; + case TETRAHEDRON: return "TETRAHEDRON"; + case PRISM: return "PRISM"; + case PYRAMID: return "PYRAMID"; + case GENERIC_2D: return "GENERIC_2D"; + case GENERIC_3D: return "GENERIC_3D"; + case EDGE: return "EDGE"; + case TETRAHEDRON10: return "TETRAHEDRON10"; + case PENTAGONAL_PRISM: return "PENTAGONAL_PRISM"; + case HEXAGONAL_PRISM: return "HEXAGONAL_PRISM"; + case NO_TYPE: return "NO_TYPE"; + } + return "UNKNOWN"; +} + +inline +cell_topo topo_from_name(const std::string& t) +{ + if (t=="SQUARE") return SQUARE; + if (t=="TRIANGLE") return TRIANGLE; + if (t=="HEXAHEDRON") return HEXAHEDRON; + if (t=="TETRAHEDRON") return TETRAHEDRON; + if (t=="PRISM") return PRISM; + if (t=="PYRAMID") return PYRAMID; + if (t=="GENERIC_2D") return GENERIC_2D; + if (t=="GENERIC_3D") return GENERIC_3D; + if (t=="EDGE") return EDGE; + if (t=="TETRAHEDRON10") return TETRAHEDRON10; + if (t=="PENTAGONAL_PRISM") return PENTAGONAL_PRISM; + if (t=="HEXAGONAL_PRISM") return HEXAGONAL_PRISM; + if (t=="NO_TYPE") return NO_TYPE; + return NO_TYPE; +} + +/** + * @brief To get the type of dimD cell of the CMap of cmapdim dimension. + */ +template +struct Get_cell_topo +{ + static cell_topo run(CMap&, typename CMap::Dart_descriptor dh, + typename CMap::Dart_descriptor& starting_dart) + { + starting_dart=dh; + return NO_TYPE; + } +}; + +/** + * @brief To get the type associated of an edge. For now only one type. + */ +template +struct Get_cell_topo +{ + static cell_topo run(CMap&, typename CMap::Dart_descriptor it, + typename CMap::Dart_descriptor& starting_dart) + { + starting_dart=it; + return EDGE; + } +}; + +/** + * @brief To get the type of 2D cell of the CMap of cmapdim dimension. + */ +template +struct Get_cell_topo +{ + static cell_topo run(CMap& cmap, typename CMap::Dart_descriptor it, + typename CMap::Dart_descriptor& starting_dart) + { + starting_dart=it; + + if (cmap.is_face_combinatorial_polygon(it, 3)) + { return TRIANGLE; } + + else if (cmap.is_face_combinatorial_polygon(it, 4)) + { return SQUARE; } + + return GENERIC_2D; + } +}; + +/** + * @brief To get the type of 3D cell of the CMap of dimension 3. + */ +template +struct Get_cell_topo +{ + static cell_topo run(CMap& cmap, typename CMap::Dart_descriptor it, + typename CMap::Dart_descriptor& starting_dart) + { + starting_dart=it; + + if (cmap.is_volume_combinatorial_tetrahedron(it)) + { return TETRAHEDRON; } + + else if (cmap.is_volume_combinatorial_hexahedron(it)) + { return HEXAHEDRON; } + + else if(cmap.is_volume_combinatorial_tetrahedron10(it)) + { return TETRAHEDRON10; } + + // For non symetric object, we need to test all darts + for (auto itv=cmap.template darts_of_cell<3>(it).begin(), + itvend=cmap.template darts_of_cell<3>(it).end(); itv!=itvend; ++itv) + { + starting_dart=itv; + + if (cmap.is_volume_combinatorial_prism(itv)) + { return PRISM; } + + else if (cmap.is_volume_combinatorial_pentagonal_prism(itv)) + { return PENTAGONAL_PRISM; } + + else if (cmap.is_volume_combinatorial_pyramid(itv)) + { return PYRAMID; } + + else if (cmap.is_volume_combinatorial_hexagonal_prism(itv)) + { return HEXAGONAL_PRISM; } + + } + + return GENERIC_3D; + } +}; + +template +cell_topo get_cell_topo(CMap& cmap, typename CMap::Dart_descriptor it, + typename CMap::Dart_descriptor& starting_dart) +{ return Get_cell_topo::run(cmap, it, starting_dart); } + +template +cell_topo get_cell_topo(CMap& cmap, typename CMap::Dart_descriptor it) +{ + typename CMap::Dart_descriptor dummy; + return get_cell_topo(cmap, it, dummy); +} + +template +cell_topo get_cell_topo(const CMap& cmap, typename CMap::Dart_const_descriptor it, + typename CMap::Dart_const_descriptor& starting_dart) +{ + typename CMap::Dart_descriptor it2=const_cast(cmap).dart_descriptor + (cmap.darts().index(it)); + typename CMap::Dart_descriptor sd2; + cell_topo res=Get_cell_topo::run(const_cast(cmap), + it2, sd2); + starting_dart=sd2; + return res; +} + +template +cell_topo get_cell_topo(const CMap& cmap, typename CMap::Dart_const_descriptor it) +{ + typename CMap::Dart_descriptor it2=it; + return Get_cell_topo::run(const_cast(cmap), it2); +} + +} } } // namespace CGAL::CMap::Element_topo + +#endif // CMAP_ELEMENT_TOPO_H From 5a3dbda022a442eb8457ac6f70e9ec82b8a9db58 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Mon, 8 Sep 2025 12:30:48 +0200 Subject: [PATCH 12/30] Test for read write vtk + data files --- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 5 + .../Linear_cell_complex_vtk_io_test.cpp | 225 +- .../data/2generic_cell.vtk | 35 + .../test/Linear_cell_complex/data/2hexa.vtk | 26 + .../test/Linear_cell_complex/data/2prism.vtk | 30 + .../Linear_cell_complex/data/2pyramid.vtk | 21 + .../test/Linear_cell_complex/data/2tetra.vtk | 33 + .../data/beam-with-mixed-cells.vtk | 1958 ++++++++++++++++- 8 files changed, 2283 insertions(+), 50 deletions(-) create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/2generic_cell.vtk create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/2hexa.vtk create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/2prism.vtk create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/2pyramid.vtk create mode 100644 Linear_cell_complex/test/Linear_cell_complex/data/2tetra.vtk diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index 0a70ee38e22..2805f904d8d 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -423,6 +423,11 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, { alcc.erase_vertex_attribute(itv); } } + if(vertex_scalars!=nullptr) + { vertex_scalars->clear(); } + if(cell_scalars!=nullptr) + { cell_scalars->clear(); } + while(std::getline(is, line)) { // Read POINT_DATA scalars if present diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index 6587b9e928b..10f825f0435 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -6,62 +6,197 @@ typedef CGAL::Linear_cell_complex_for_combinatorial_map<3, 3> LCC; -int main() { +bool test_file(const char* filename) +{ LCC lcc1, lcc2; std::vector vertex_scalars1, vertex_scalars2; std::vector volume_scalars1, volume_scalars2; - const char* filename = "data/beam-with-mixed-cells.vtk"; - - - bool ok_read1 = CGAL::IO::read_VTK(lcc1, filename, - &vertex_scalars1, &volume_scalars1); - assert(ok_read1); - - - std::size_t nb_vertices = 0; - for(auto itv = lcc1.vertex_attributes().begin(), itvend = lcc1.vertex_attributes().end(); itv != itvend; ++itv) - ++nb_vertices; - if(vertex_scalars1.size() != nb_vertices) { - vertex_scalars1.resize(nb_vertices); - for(std::size_t i=0;i(i); + bool res=CGAL::IO::read_VTK(lcc1, filename); + if(!res) + { + std::cerr<<"[ERROR] LCC_vtk_io_test error read_VTK in test_file"<().begin(), - itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; ++itvol) - ++nb_volumes; + std::size_t nb_vertices=lcc1.number_of_vertex_attributes(); + vertex_scalars1.resize(nb_vertices); + for(std::size_t i=0;i(i); } - if(volume_scalars1.size() != nb_volumes) { - volume_scalars1.clear(); - volume_scalars1.reserve(nb_volumes); - for(auto itvol = lcc1.one_dart_per_cell<3>().begin(), - itvolend = lcc1.one_dart_per_cell<3>().end(); itvol != itvolend; ++itvol) { - auto d = lcc1.dart_descriptor(*itvol); - std::size_t nbv = lcc1.template one_dart_per_incident_cell<0,3>(d).size(); - volume_scalars1.push_back(nbv); - } + std::size_t nb_volumes=0; + for(auto itvol=lcc1.one_dart_per_cell<3>().begin(), + itvolend=lcc1.one_dart_per_cell<3>().end(); itvol!=itvolend; ++itvol) + { ++nb_volumes; } + + volume_scalars1.reserve(nb_volumes); + for(auto itvol=lcc1.one_dart_per_cell<3>().begin(), + itvolend=lcc1.one_dart_per_cell<3>().end(); itvol!=itvolend; ++itvol) + { + std::size_t nbv=lcc1.template one_dart_per_incident_cell<0,3>(itvol).size(); + volume_scalars1.push_back(nbv); } - - bool ok_write = CGAL::IO::write_VTK(lcc1, filename, - &vertex_scalars1, &volume_scalars1); - assert(ok_write); + res=CGAL::IO::write_VTK(lcc1, "output.vtk", + &vertex_scalars1, &volume_scalars1); + if(!res) + { + std::cerr<<"[ERROR] LCC_vtk_io_test error write_VTK in test_file"<(lcc2, filename, - &vertex_scalars2, &volume_scalars2); - assert(ok_read2); + res=CGAL::IO::read_VTK(lcc2, "output.vtk", + &vertex_scalars2, &volume_scalars2); + if(!res) + { + std::cerr<<"[ERROR] LCC_vtk_io_test error read_VTK 2 in test_file"< vertex_scalars; + std::vector volume_scalars; + + /// Read the last file generated by test_file("data/beam-with-mixed-cells.vtk") + /// i.e. beam-with-mixed-cells.vtk with point and cells scalars. + if(!CGAL::IO::read_VTK(lcc, "output.vtk", + &vertex_scalars, &volume_scalars) || + vertex_scalars.size()!=719 || volume_scalars.size()!=615) + { + std::cerr<<"[ERROR] LCC_vtk_io_test error read_VTK in test_different_scalars"< Date: Mon, 8 Sep 2025 13:06:42 +0200 Subject: [PATCH 13/30] Cleanup --- Linear_cell_complex/Testing/Temporary/CTestCostData.txt | 1 - Linear_cell_complex/Testing/Temporary/LastTest.log | 3 --- Testing/Temporary/CTestCostData.txt | 1 - Testing/Temporary/LastTest.log | 3 --- 4 files changed, 8 deletions(-) delete mode 100644 Linear_cell_complex/Testing/Temporary/CTestCostData.txt delete mode 100644 Linear_cell_complex/Testing/Temporary/LastTest.log delete mode 100644 Testing/Temporary/CTestCostData.txt delete mode 100644 Testing/Temporary/LastTest.log diff --git a/Linear_cell_complex/Testing/Temporary/CTestCostData.txt b/Linear_cell_complex/Testing/Temporary/CTestCostData.txt deleted file mode 100644 index ed97d539c09..00000000000 --- a/Linear_cell_complex/Testing/Temporary/CTestCostData.txt +++ /dev/null @@ -1 +0,0 @@ ---- diff --git a/Linear_cell_complex/Testing/Temporary/LastTest.log b/Linear_cell_complex/Testing/Temporary/LastTest.log deleted file mode 100644 index 7016d17c7c2..00000000000 --- a/Linear_cell_complex/Testing/Temporary/LastTest.log +++ /dev/null @@ -1,3 +0,0 @@ -Start testing: Jul 25 15:46 CEST ----------------------------------------------------------- -End testing: Jul 25 15:46 CEST diff --git a/Testing/Temporary/CTestCostData.txt b/Testing/Temporary/CTestCostData.txt deleted file mode 100644 index ed97d539c09..00000000000 --- a/Testing/Temporary/CTestCostData.txt +++ /dev/null @@ -1 +0,0 @@ ---- diff --git a/Testing/Temporary/LastTest.log b/Testing/Temporary/LastTest.log deleted file mode 100644 index 7016d17c7c2..00000000000 --- a/Testing/Temporary/LastTest.log +++ /dev/null @@ -1,3 +0,0 @@ -Start testing: Jul 25 15:46 CEST ----------------------------------------------------------- -End testing: Jul 25 15:46 CEST From 1a03f8c6e10e234970f73de06e7b87c64fdc9888 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 9 Oct 2025 17:32:55 +0200 Subject: [PATCH 14/30] update following Mael review --- .../include/CGAL/Combinatorial_map.h | 16 ++++++++-------- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 2 +- .../include/CGAL/Linear_cell_complex_base.h | 8 ++++---- .../Linear_cell_complex_incremental_builder_3.h | 17 +++++++++-------- 4 files changed, 22 insertions(+), 21 deletions(-) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index e4839b37d4b..1502b7bff7b 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -3860,7 +3860,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial tetrahedron. - * @param adart an initial dart + * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial tetrahedron. */ bool is_volume_combinatorial_tetrahedron(Dart_const_descriptor d1) const @@ -3953,7 +3953,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial hexahedron. - * @param adart an initial dart + * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial hexahedron. */ bool is_volume_combinatorial_hexahedron(Dart_const_descriptor d1) const @@ -4020,7 +4020,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial prism. - * @param adart an intial dart + * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial prism. */ bool is_volume_combinatorial_prism(Dart_const_descriptor d1) const @@ -4109,7 +4109,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial pyramid. - * @param adart an intial dart + * @param d1 an intial dart * @return true iff the volume containing adart is a combinatorial pyramid. */ bool is_volume_combinatorial_pyramid(Dart_const_descriptor d1) const @@ -4196,7 +4196,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial pentagonal prism. - * @param adart an initial dart + * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial pentagonal prism. */ bool is_volume_combinatorial_pentagonal_prism(Dart_const_descriptor d1) const @@ -4261,7 +4261,7 @@ namespace CGAL { } /** Test if a volume is a combinatorial hexagonal prism. - * @param adart an initial dart + * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial hexagonal prism. */ bool is_volume_combinatorial_hexagonal_prism(Dart_const_descriptor d1) const @@ -4336,8 +4336,8 @@ namespace CGAL { } /** Test if a volume is a combinatorial tetrahedron10. - * @param adart an initial dart - * @return true iff the volume containing adart is a combinatorial tetrahedron. + * @param d1 an initial dart + * @return true iff the volume containing adart is a combinatorial tetrahedron10. */ bool is_volume_combinatorial_tetrahedron10(Dart_const_descriptor d1) const { diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index 2805f904d8d..cbdeaaa0ef9 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -10,7 +10,7 @@ // Author(s) : Guillaume Damiand #ifndef CGAL_LCC_IO_VTK_H -#define CGAL_LCC_IO_VTK_H 1 +#define CGAL_LCC_IO_VTK_H #include #include diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h index 7b9dcec4f5e..f62d36ff41d 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h @@ -717,7 +717,7 @@ namespace CGAL { create_vertex_attribute(p7)); } - /** Create an prism given 6 Vertex_attribute_descriptor. + /** Create a prism given 6 Vertex_attribute_descriptor. * (6 vertices, 9 edges and 5 facets) * \verbatim * 3---4 @@ -751,7 +751,7 @@ namespace CGAL { return make_combinatorial_prism(d1, d2, d3, d4, d5); } - /** Create an prism given 6 points. + /** Create a prism given 6 points. * \verbatim * 3---4 * |\ /| @@ -783,7 +783,7 @@ namespace CGAL { create_vertex_attribute(p5)); } - /** Create an pyramid given 5 Vertex_attribute_descriptor. + /** Create a pyramid given 5 Vertex_attribute_descriptor. * (5 vertices, 8 edges and 5 facets) * \verbatim * 4 @@ -815,7 +815,7 @@ namespace CGAL { return make_combinatorial_pyramid(d1, d2, d3, d4, d5); } - /** Create an pyramid given 5 points. + /** Create a pyramid given 5 points. * \verbatim * 4 * /|\ diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h index 1fadfead366..d88208ad181 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_incremental_builder_3.h @@ -261,7 +261,8 @@ public: prev_dart =lcc.null_descriptor; } -void add_vertex_to_facet(size_type i, std::vector* tabdarts = nullptr) { + void add_vertex_to_facet(size_type i, std::vector* tabdarts = nullptr) + { CGAL_assertion(i::run(lcc, vertex_map[i], prev_dart); @@ -326,13 +327,13 @@ void add_vertex_to_facet(size_type i, std::vector* tabdarts = nullptr) { } DH add_facet(std::initializer_list l, std::vector* tabdarts = nullptr) -{ - if(tabdarts != nullptr) { tabdarts->reserve(tabdarts->size() + l.size()); } - begin_facet(); - for (size_type i:l) - { add_vertex_to_facet(i, tabdarts); } - return end_facet(); -} + { + if(tabdarts != nullptr) { tabdarts->reserve(tabdarts->size() + l.size()); } + begin_facet(); + for (size_type i:l) + { add_vertex_to_facet(i, tabdarts); } + return end_facet(); + } void begin_surface() { From cd248c2638f6d5e10b836f153d19cfa7504471ff Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 9 Oct 2025 18:40:47 +0200 Subject: [PATCH 15/30] Change order of parameters for lcc read/write vtk --- .../linear_cell_complex_3_vtk_io.cpp | 13 +----- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 41 +++++++++---------- .../Linear_cell_complex_vtk_io_test.cpp | 26 ++++++------ 3 files changed, 33 insertions(+), 47 deletions(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 794f1aaa62a..d1c040ac29c 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -1,14 +1,3 @@ -/*! - \ingroup PkgLinearCellComplexExamples - \brief Minimal example: read a `.3map` file, compute per-volume vertex count, and write to VTK. - - This example loads a 3D linear cell complex from a `.3map` file using - \cgal function `CGAL::load_combinatorial_map()`. It computes for each - 3-cell (volume) the number of incident vertices (0-cells), stores these values - in a `std::vector`, and writes the result to a `.vtk` file with - `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. -*/ - #include #include #include @@ -29,7 +18,7 @@ int main() volume_scalars.push_back(nbv); } - if(!CGAL::IO::write_VTK(lcc, "beam-with-mixed-cells.vtk", nullptr, + if(!CGAL::IO::write_VTK("beam-with-mixed-cells.vtk", lcc, nullptr, &volume_scalars)) { return EXIT_FAILURE; } diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index cbdeaaa0ef9..2bcf5fe9973 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -26,7 +26,7 @@ namespace CGAL { namespace IO { -/** \file VTK.h +/* * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII * format. * @@ -50,10 +50,8 @@ namespace IO { // Declarations // ============================================================================ -/** - * \brief Read a VTK legacy ASCII file and load it into a 3D - * Linear_cell_complex. - * \ingroup PkgLinearCellComplexExamples +/* + * Read a VTK legacy ASCII file and load it into a 3D Linear_cell_complex. * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> * \tparam VertexScalarType Type for vertex scalar data (default: float) @@ -68,14 +66,13 @@ namespace IO { */ template -bool read_VTK(LCC& alcc, - const char* filename, +bool read_VTK(const char* filename, + LCC& alcc, std::vector* vertex_scalars, std::vector* volume_scalars); -/** - * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. - * \ingroup PkgLinearCellComplexExamples +/* + * Write a 3D Linear_cell_complex to a VTK legacy ASCII file. * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> * \tparam VertexScalarType Type for vertex scalar data (default: float) @@ -90,14 +87,14 @@ bool read_VTK(LCC& alcc, */ template -bool write_VTK(const LCC& alcc, - const char* filename, +bool write_VTK(const char* filename, + const LCC& alcc, const std::vector* vertex_scalars, const std::vector* volume_scalars); // "Advanced" versions with functors template -bool write_VTK_with_fct(const LCC& alcc, const char* filename, +bool write_VTK_with_fct(const char* filename, const LCC& alcc, PointFunctor ptval, CellFunctor cellval); // ============================================================================ @@ -638,7 +635,7 @@ bool read_VTK(LCC& alcc, (alcc, filename, nullptr, volume_scalars); } //////////////////////////////////////////////////////////////////////////////////// template -inline bool write_VTK_with_fct(const LCC& alcc, const char* filename, +inline bool write_VTK_with_fct(const char* filename, const LCC& alcc, PointFunctor pointfct, CellFunctor cellfct) { CGAL_assertion(filename!=nullptr); @@ -664,7 +661,7 @@ inline bool write_VTK_with_fct(const LCC& alcc, const char* filename, } //////////////////////////////////////////////////////////////////////////////////// template -bool write_VTK(const LCC& alcc, const char* filename, +bool write_VTK(const char* filename, const LCC& alcc, const std::vector* vertex_scalars, const std::vector* volume_scalars) { @@ -688,27 +685,27 @@ bool write_VTK(const LCC& alcc, const char* filename, { return (*volume_scalars)[i]; }; } - return write_VTK_with_fct(alcc, filename, vertexfct, cellfct); + return write_VTK_with_fct(filename, alcc, vertexfct, cellfct); } template -bool write_VTK(const LCC& alcc, const char* filename) +bool write_VTK(const char* filename, const LCC& alcc) { return write_VTK(alcc, filename, nullptr, nullptr); } template -bool write_VTK(const LCC& alcc, const char* filename, - const std::vector* vertex_scalars) +bool write_VTK(const char* filename, const LCC& alcc, + const std::vector* vertex_scalars) { return write_VTK(alcc, filename, vertex_scalars, nullptr); } template -bool write_VTK(const LCC& alcc, const char* filename, - std::nullptr_t, - const std::vector* volume_scalars) +bool write_VTK(const char* filename, const LCC& alcc, + std::nullptr_t, + const std::vector* volume_scalars) { return write_VTK(alcc, filename, nullptr, volume_scalars); diff --git a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp index 10f825f0435..179961092f5 100644 --- a/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp +++ b/Linear_cell_complex/test/Linear_cell_complex/Linear_cell_complex_vtk_io_test.cpp @@ -12,7 +12,7 @@ bool test_file(const char* filename) std::vector vertex_scalars1, vertex_scalars2; std::vector volume_scalars1, volume_scalars2; - bool res=CGAL::IO::read_VTK(lcc1, filename); + bool res=CGAL::IO::read_VTK(filename, lcc1); if(!res) { std::cerr<<"[ERROR] LCC_vtk_io_test error read_VTK in test_file"< Date: Thu, 9 Oct 2025 18:47:58 +0200 Subject: [PATCH 16/30] add example in lcc for write_vtk; add groups --- .../doc/Linear_cell_complex/Linear_cell_complex.txt | 7 +++++++ .../doc/Linear_cell_complex/PackageDescription.txt | 12 ++++++++++++ 2 files changed, 19 insertions(+) diff --git a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt index d58e0f6e2e5..6dc799dae2b 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt @@ -288,6 +288,13 @@ The following example shows the use of \link GenericMap::insert_cell_1_between_t Result of the run of the linear_cell_complex_3_insert program. A window shows the 3D cube where one face has a hole. \cgalFigureEnd +\subsection Linear_cell_complexWriteVTK Write a Linear Cell Complex in a VTK File +\anchor ssecLCCWriteVtK + +This example loads a 3D linear cell complex from a `.3map` file using \cgal function `CGAL::load_combinatorial_map()`. It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file with `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. + +\cgalExample{Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp} + \section Linear_cell_complexDesign Design and Implementation History This package was developed by Guillaume Damiand, with the help of Andreas Fabri, Sébastien Loriot and Laurent Rineau. Monique Teillaud and Bernd Gärtner contributed to the manual. diff --git a/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt b/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt index caf7173fbee..8c078b6159c 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt @@ -23,6 +23,14 @@ /// \defgroup PkgDrawLinearCellComplex Draw a Linear Cell Complex /// \ingroup PkgLinearCellComplexRef +/// \defgroup PkgLinearCellComplexRefIO IO Functions for LCC +/// \ingroup PkgLinearCellComplexRef + +/*! High-level operations. +\cgalInclude{CGAL/Linear_cell_complex/IO/VTK.h} +*/ +/// \defgroup PkgLinearCellComplexRefIOVTK VTK IO Functions for LCC +/// \ingroup PkgLinearCellComplexRefIO /*! \addtogroup PkgLinearCellComplexRef @@ -74,4 +82,8 @@ - \link PkgDrawLinearCellComplex CGAL::draw() \endlink - \link PkgDrawLinearCellComplex CGAL::add_in_graphics_scene() \endlink +\cgalCRPSubsection{IO Functions for LCC} +- `CGAL::IO::Read_VTK()` +- `CGAL::IO::Write_VTK()` + */ From ed6eb76670ea2605c52992ba9565de6a00781d39 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 9 Oct 2025 18:53:22 +0200 Subject: [PATCH 17/30] spaces --- Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index 2bcf5fe9973..115d2e2a416 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -94,7 +94,7 @@ bool write_VTK(const char* filename, // "Advanced" versions with functors template -bool write_VTK_with_fct(const char* filename, const LCC& alcc, +bool write_VTK_with_fct(const char* filename, const LCC& alcc, PointFunctor ptval, CellFunctor cellval); // ============================================================================ From 8c8431679630ec9becc2898ab14a66c266e03af0 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 9 Oct 2025 18:57:19 +0200 Subject: [PATCH 18/30] doc for lcc vtk io --- .../CGAL/Linear_cell_complex/IO/VTK.h | 68 +++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h new file mode 100644 index 00000000000..6f7b4ae2c67 --- /dev/null +++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h @@ -0,0 +1,68 @@ +namespace CGAL { +namespace IO { + +/** \file VTK.h + * Functions to import/export 3D Linear_cell_complex from/to VTK legacy ASCII + * format. + * + * Only supports: + * - Linear_cell_complex_for_combinatorial_map<3,3> + * - VTK legacy ASCII format (.vtk files) + * - Optional scalar fields for vertices and volumes + * + * Supported VTK cell types: + * - VTK_TETRA (10): Tetrahedron + * - VTK_VOXEL (11): Voxel (special hexahedron ordering) + * - VTK_HEXAHEDRON (12): Hexahedron + * - VTK_WEDGE (13): Prism/Wedge + * - VTK_PYRAMID (14): Pyramid + * - VTK_PENTAGONAL_PRISM (15): Pentagonal prism + * - VTK_HEXAGONAL_PRISM (16): Hexagonal prism + * - VTK_POLYHEDRON (42): Generic polyhedron + */ + +/** + * \brief Read a VTK legacy ASCII file and load it into a 3D + * Linear_cell_complex. + * \ingroup PkgLinearCellComplexRefIOVTK + * + * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam VertexScalarType Type for vertex scalar data (default: float) + * \tparam VolumeScalarType Type for volume scalar data (default: float) + * \param filename Path to the VTK file + * \param alcc The Linear_cell_complex to populate (will be cleared first) + * \param vertex_scalars Optional output vector to store per-vertex scalar values. + * If provided, will be resized to match number of vertices. + * \param volume_scalars Optional output vector to store per-volume scalar values. + * If provided, will be resized to match number of volumes. + * \return `true` if loading was successful, `false` otherwise + */ +template +bool read_VTK(const char* filename, + LCC& alcc, + std::vector* vertex_scalars, + std::vector* volume_scalars); + +/** + * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. + * \ingroup PkgLinearCellComplexRefIOVTK + * + * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam VertexScalarType Type for vertex scalar data (default: float) + * \tparam VolumeScalarType Type for volume scalar data (default: float) + * \param filename Path to the output VTK file + * \param alcc The Linear_cell_complex to export + * \param vertex_scalars Optional per-vertex scalar data. If provided, must have + * same size as number of vertex attributes in the LCC. + * \param volume_scalars Optional per-volume scalar data. If provided, must have + * same size as number of 3-cells in the LCC. + * \return `true` if writing was successful, `false` otherwise + */ +template +bool write_VTK(const char* filename, + const LCC& alcc, + const std::vector* vertex_scalars, + const std::vector* volume_scalars); + +} // namespace IO +} // namespace CGAL From ce1c890cb0ec71294a56f23199e9aa0a55b25ed4 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Fri, 10 Oct 2025 09:42:43 +0200 Subject: [PATCH 19/30] order of parameter for lcc vtk functions --- .../linear_cell_complex_3_vtk_io.cpp | 33 +++++++++++-------- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 31 ++++++++--------- 2 files changed, 32 insertions(+), 32 deletions(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index d1c040ac29c..8bd7b39e38d 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -1,26 +1,31 @@ #include #include -#include #include #include int main() { CGAL::Linear_cell_complex_for_combinatorial_map<3> lcc; - CGAL::load_combinatorial_map("data/beam-with-mixed-cells.3map", lcc); + std::ifstream is("data/beam-with-mixed-cells.3map"); + if(!is) + { + std::cout<<"Error opening data/beam-with-mixed-cells.3map."< volume_scalars; - for(auto it=lcc.template one_dart_per_cell<3>().begin(), - itend=lcc.template one_dart_per_cell<3>().end(); it!=itend; ++it) - { - std::size_t nbv=lcc.template one_dart_per_incident_cell<0,3>(it).size(); - volume_scalars.push_back(nbv); - } + is>>lcc; + // Compute per-volume vertex count + std::vector volume_scalars; + for(auto it=lcc.template one_dart_per_cell<3>().begin(), + itend=lcc.template one_dart_per_cell<3>().end(); it!=itend; ++it) + { + std::size_t nbv=lcc.template one_dart_per_incident_cell<0,3>(it).size(); + volume_scalars.push_back(nbv); + } - if(!CGAL::IO::write_VTK("beam-with-mixed-cells.vtk", lcc, nullptr, - &volume_scalars)) - { return EXIT_FAILURE; } + if(!CGAL::IO::write_VTK("beam-with-mixed-cells.vtk", lcc, nullptr, + &volume_scalars)) + { std::cout<<"Error for write_VTK."< -bool read_VTK(LCC& alcc, - const char* filename, +bool read_VTK(const char* filename, LCC& alcc, std::vector* vertex_scalars, std::vector* volume_scalars) { @@ -614,25 +613,21 @@ bool read_VTK(LCC& alcc, } template -bool read_VTK(LCC& alcc, - const char* filename) -{ return read_VTK - (alcc, filename, nullptr, nullptr); } +bool read_VTK(const char* filename, LCC& alcc) +{ return read_VTK(filename, alcc, nullptr, nullptr); } template -bool read_VTK(LCC& alcc, - const char* filename, - std::vector* vertex_scalars) +bool read_VTK(const char* filename, LCC& alcc, + std::vector* vertex_scalars) { return read_VTK - (alcc, filename, vertex_scalars, nullptr); } + (filename, alcc, vertex_scalars, nullptr); } template -bool read_VTK(LCC& alcc, - const char* filename, - std::nullptr_t, - std::vector* volume_scalars) +bool read_VTK(const char* filename, LCC& alcc, + std::nullptr_t, + std::vector* volume_scalars) { return read_VTK - (alcc, filename, nullptr, volume_scalars); } + (filename, alcc, nullptr, volume_scalars); } //////////////////////////////////////////////////////////////////////////////////// template inline bool write_VTK_with_fct(const char* filename, const LCC& alcc, @@ -691,14 +686,14 @@ bool write_VTK(const char* filename, const LCC& alcc, template bool write_VTK(const char* filename, const LCC& alcc) { - return write_VTK(alcc, filename, nullptr, nullptr); + return write_VTK(filename, alcc, nullptr, nullptr); } template bool write_VTK(const char* filename, const LCC& alcc, const std::vector* vertex_scalars) { - return write_VTK(alcc, filename, vertex_scalars, + return write_VTK(filename, alcc, vertex_scalars, nullptr); } @@ -707,7 +702,7 @@ bool write_VTK(const char* filename, const LCC& alcc, std::nullptr_t, const std::vector* volume_scalars) { - return write_VTK(alcc, filename, nullptr, + return write_VTK(filename, alcc, nullptr, volume_scalars); } //////////////////////////////////////////////////////////////////////////////////// From e1ec2fd1d242bf4fc566cb8ea565899fa585275e Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Fri, 10 Oct 2025 09:55:12 +0200 Subject: [PATCH 20/30] Document cmap read/write; and lcc read/write vtk --- .../doc/Combinatorial_map/Concepts/GenericMap.h | 14 ++++++++++++-- .../Combinatorial_map/PackageDescription.txt | 7 +++++++ .../Linear_cell_complex/Linear_cell_complex.txt | 7 ++++++- .../Linear_cell_complex/PackageDescription.txt | 6 ++++-- .../Linear_cell_complex/fig/lcc-export-vtk.png | Bin 0 -> 91005 bytes 5 files changed, 29 insertions(+), 5 deletions(-) create mode 100644 Linear_cell_complex/doc/Linear_cell_complex/fig/lcc-export-vtk.png diff --git a/Combinatorial_map/doc/Combinatorial_map/Concepts/GenericMap.h b/Combinatorial_map/doc/Combinatorial_map/Concepts/GenericMap.h index b7f985acac0..fbe5315f6d3 100644 --- a/Combinatorial_map/doc/Combinatorial_map/Concepts/GenericMap.h +++ b/Combinatorial_map/doc/Combinatorial_map/Concepts/GenericMap.h @@ -1068,8 +1068,18 @@ If \link GenericMap::are_attributes_automatically_managed `are_attributes_automa template size_type remove_cell(Dart_descriptor d); +/*! +\ingroup PkgCombinatorialMapsRefIO + Writes `amap` in `os`, using our own internal file format in XML. Writes both the topology of the combinatorial map and its enabled attributes. + */ +friend std::ostream& operator<< (std::ostream& os, const GenericMap& amap); + +/*! + \ingroup PkgCombinatorialMapsRefIO + Reads `amap` from `is`, using our own internal file format in XML. Reads both the topology of the combinatorial map and its enabled attributes which are present in `is`. Note that if `amap` is not empty before the reading, the new map is added in the previous one. + */ +friend std::ifstream& operator>> (std::ifstream& is, GenericMap& amap); + /// @} }; /* end GenericMap */ - - diff --git a/Combinatorial_map/doc/Combinatorial_map/PackageDescription.txt b/Combinatorial_map/doc/Combinatorial_map/PackageDescription.txt index 5016a763697..45081261ce8 100644 --- a/Combinatorial_map/doc/Combinatorial_map/PackageDescription.txt +++ b/Combinatorial_map/doc/Combinatorial_map/PackageDescription.txt @@ -6,6 +6,9 @@ /// \defgroup PkgCombinatorialMapsClasses Classes /// \ingroup PkgCombinatorialMapsRef +/// \defgroup PkgCombinatorialMapsRefIO IO Functions for CMap +/// \ingroup PkgCombinatorialMapsRef + /*! \addtogroup PkgCombinatorialMapsRef \cgalPkgDescriptionBegin{Combinatorial Maps,PkgCombinatorialMaps} @@ -36,5 +39,9 @@ - `CGAL::Cell_attribute_with_id` - `CGAL::Generic_map_min_items` +\cgalCRPSubsection{IO Functions for CMap} +- \link PkgCombinatorialMapsRefIO `std::ostream& operator<< (std::ostream& os, const GenericMap& amap)` \endlink +- \link PkgCombinatorialMapsRefIO `std::ifstream& operator>> (std::ifstream& is, GenericMap& amap)` \endlink + */ diff --git a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt index 6dc799dae2b..d0dc1a2b351 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt @@ -291,10 +291,15 @@ Result of the run of the linear_cell_complex_3_insert program. A window shows th \subsection Linear_cell_complexWriteVTK Write a Linear Cell Complex in a VTK File \anchor ssecLCCWriteVtK -This example loads a 3D linear cell complex from a `.3map` file using \cgal function `CGAL::load_combinatorial_map()`. It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file with `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. +This example loads a 3D linear cell complex from a `.3map` file (using the `operator>>`). It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file with `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. \cgalExample{Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp} +\cgalFigureBegin{fig_lcc_export_vtk,lcc-export-vtk.png} +Visualization of the VTK file generated by the linear_cell_complex_3_vtk_io program, using Paraview. Each volume is colored depending on its number of vertices. +\cgalFigureEnd + + \section Linear_cell_complexDesign Design and Implementation History This package was developed by Guillaume Damiand, with the help of Andreas Fabri, Sébastien Loriot and Laurent Rineau. Monique Teillaud and Bernd Gärtner contributed to the manual. diff --git a/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt b/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt index 8c078b6159c..03983e5a810 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/PackageDescription.txt @@ -83,7 +83,9 @@ - \link PkgDrawLinearCellComplex CGAL::add_in_graphics_scene() \endlink \cgalCRPSubsection{IO Functions for LCC} -- `CGAL::IO::Read_VTK()` -- `CGAL::IO::Write_VTK()` +- \link PkgCombinatorialMapsRefIO `std::ostream& operator<< (std::ostream& os, const GenericMap& amap)` \endlink +- \link PkgCombinatorialMapsRefIO `std::ifstream& operator>> (std::ifstream& is, GenericMap& amap)` \endlink +- \link PkgLinearCellComplexRefIOVTK `CGAL::IO::Read_VTK()` \endlink +- \link PkgLinearCellComplexRefIOVTK `CGAL::IO::Write_VTK()` \endlink */ diff --git 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read/write_vtk lcc in stream support --- .../File_formats/Supported_file_formats.txt | 8 ++++---- Stream_support/doc/Stream_support/dependencies | 1 + 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt b/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt index b11507d338c..e7c81b16d76 100644 --- a/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt +++ b/Stream_support/doc/Stream_support/File_formats/Supported_file_formats.txt @@ -519,14 +519,14 @@ with both vertices and volumes. Input 3D Volumetric Mesh - `Linear_cell_complex_for_combinatorial_map<3,3>` - CGAL::IO::read_VTK() + `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` + \link PkgLinearCellComplexRefIOVTK `CGAL::IO::read_VTK()` \endlink Output 3D Volumetric Mesh - `Linear_cell_complex_for_combinatorial_map<3,3>` - CGAL::IO::write_VTK() + `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` + \link PkgLinearCellComplexRefIOVTK `CGAL::IO::Write_VTK()` \endlink diff --git a/Stream_support/doc/Stream_support/dependencies b/Stream_support/doc/Stream_support/dependencies index 55201690c3c..6c6839848e6 100644 --- a/Stream_support/doc/Stream_support/dependencies +++ b/Stream_support/doc/Stream_support/dependencies @@ -3,6 +3,7 @@ Arrangement_on_surface_2 BGL Constrained_triangulation_3 Kernel_23 +Linear_cell_complex Manual Mesh_2 Mesh_3 From f6425d7773b417be91f56c951a5a591dd49dce9f Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Sat, 11 Oct 2025 14:57:17 +0200 Subject: [PATCH 22/30] write error message only once --- .../include/CGAL/Linear_cell_complex/IO/VTK.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h index a5700661597..ab829bf5b8d 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex/IO/VTK.h @@ -22,6 +22,7 @@ #include #include #include +#include namespace CGAL { namespace IO { @@ -361,6 +362,7 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, // Create cells based on types std::size_t cell_type; + std::set error_types; for(std::size_t i = 0; i>cell_type)) @@ -408,7 +410,11 @@ bool read_lcc_from_vtk_ascii(std::istream& is, LCC& alcc, make_generic_cell_with_builder(ib, v); break; default: - std::cerr<<"[ERROR] read_VTK: type "< Date: Wed, 5 Nov 2025 20:29:40 +0100 Subject: [PATCH 23/30] formatting --- .../Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp index 8bd7b39e38d..87f1fe88bfe 100644 --- a/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp +++ b/Linear_cell_complex/examples/Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp @@ -25,7 +25,10 @@ int main() if(!CGAL::IO::write_VTK("beam-with-mixed-cells.vtk", lcc, nullptr, &volume_scalars)) - { std::cout<<"Error for write_VTK."< Date: Wed, 5 Nov 2025 20:37:36 +0100 Subject: [PATCH 24/30] update comments --- .../include/CGAL/Combinatorial_map.h | 86 +++++++++---------- .../include/CGAL/Linear_cell_complex_base.h | 30 +++---- 2 files changed, 58 insertions(+), 58 deletions(-) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index 1502b7bff7b..a35053846aa 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -255,7 +255,7 @@ namespace CGAL { } } - // Create an mapping between darts of the two maps (originals->copies). + // Creates a mapping between darts of the two maps (originals->copies). // (here we cannot use CGAL::Unique_hash_map because it does not provide // iterators... std::unordered_map local_dartmap; @@ -585,7 +585,7 @@ namespace CGAL { bool copy_perforated_darts=false, size_type mark_perforated=INVALID_MARK) { - // Create an mapping between darts of the two maps (originals->copies). + // Creates a mapping between darts of the two maps (originals->copies). // (here we cannot use CGAL::Unique_hash_map because it does not provide // iterators... std::unordered_map @@ -661,7 +661,7 @@ namespace CGAL { return is; } - /** Create a new dart and add it to the map. + /** Creates a new dart and add it to the map. * The marks of the darts are initialized with mmask_marks, i.e. the dart * is unmarked for all the marks. * @return a Dart_descriptor on the new dart. @@ -968,7 +968,7 @@ namespace CGAL { size_type number_of_used_marks() const { return mnb_used_marks; } - /** Test if a given mark is reserved. + /** Tests if a given mark is reserved. * @return true iff the mark is reserved (i.e. in used). */ bool is_reserved(size_type amark) const @@ -997,14 +997,14 @@ namespace CGAL { return number_of_darts() - number_of_marked_darts(amark); } - /** Test if all the darts are unmarked for a given mark. + /** Tests if all the darts are unmarked for a given mark. * @param amark the mark index. * @return true iff all the darts are unmarked for amark. */ bool is_whole_map_unmarked(size_type amark) const { return number_of_marked_darts(amark) == 0; } - /** Test if all the darts are marked for a given mark. + /** Tests if all the darts are marked for a given mark. * @param amark the mark index. * @return true iff all the darts are marked for amark. */ @@ -1071,7 +1071,7 @@ namespace CGAL { mmask_marks.flip(amark); } - /** Test if a given dart is marked for a given mark. + /** Tests if a given dart is marked for a given mark. * @param adart the dart to test. * @param amark the given mark. * @return true iff adart is marked for the mark amark. @@ -1239,7 +1239,7 @@ namespace CGAL { std::size_t orient(size_type amark) const { negate_mark(amark); return number_of_darts(); } - /** Test if this map is without boundary for a given dimension. + /** Tests if this map is without boundary for a given dimension. * @param i the dimension. * @return true iff all the darts are not i-free. * @pre 1<=i<=n @@ -1253,7 +1253,7 @@ namespace CGAL { return true; } - /** Test if this map is without boundary for all the dimensions. + /** Tests if this map is without boundary for all the dimensions. * @return true iff all the darts are non free. */ bool is_without_boundary() const @@ -1334,7 +1334,7 @@ namespace CGAL { return res; } - /** Test if the map is valid. + /** Tests if the map is valid. * @return true iff the map is valid. */ bool is_valid(bool show_errors=true) const @@ -1579,7 +1579,7 @@ namespace CGAL { return os; } - /// Create a new attribute. + /// Creates a new attribute. /// @return a descriptor on the new attribute. template typename Attribute_descriptor::type create_attribute(const Args&... args) @@ -1988,7 +1988,7 @@ namespace CGAL { else unlink_beta_for_involution(adart, i); } - /** Test if it is possible to sew by betai the two given darts + /** Tests if it is possible to sew by betai the two given darts * @param adart1 the first dart. * @param adart2 the second dart. * @return true iff \em adart1 can be i-sewn with \em adart2. @@ -3439,7 +3439,7 @@ namespace CGAL { } - /** Test if the connected component of cmap containing dart dh1 is + /** Tests if the connected component of cmap containing dart dh1 is * isomorphic to the connected component of map2 containing dart dh2, * starting from dh1 and dh2. * @param dh1 initial dart for this map @@ -3648,7 +3648,7 @@ namespace CGAL { return match; } - /** Test if this cmap is isomorphic to map2. + /** Tests if this cmap is isomorphic to map2. * @pre cmap is connected. * @param map2 the second combinatorial map * @param testDartInfo Boolean to test the equality of dart info (true) @@ -3687,7 +3687,7 @@ namespace CGAL { return false; } - /** Test if the attributes of this map are automatically updated. + /** Tests if the attributes of this map are automatically updated. * @return true iff the boolean automatic_attributes_management is set to true. */ bool are_attributes_automatically_managed() const @@ -3710,13 +3710,13 @@ namespace CGAL { void set_automatic_attributes_management_without_correction(bool newval) { this->automatic_attributes_management = newval; } - /** Create an half-edge. + /** Creates an half-edge. * @return a dart of the new half-edge. */ Dart_descriptor make_half_edge() { return create_dart(); } - /** Create an edge. + /** Creates an edge. * if closed==true, the edge has no 2-free dart. * (note that for CMap there is no difference between true and false, but * this is not the case for GMap) @@ -3730,7 +3730,7 @@ namespace CGAL { return d1; } - /** Create an edge given 2 Attribute_descriptor<0>. + /** Creates an edge given 2 Attribute_descriptor<0>. * Note that this function can be used only if 0-attributes are non void * @param h0 the first vertex descriptor. * @param h1 the second vertex descriptor. @@ -3751,7 +3751,7 @@ namespace CGAL { return d1; } - /** Create a combinatorial polygon of length alg + /** Creates a combinatorial polygon of length alg * (a cycle of alg darts beta1 links together). * @return a new dart. */ @@ -3772,7 +3772,7 @@ namespace CGAL { return start; } - /** Test if a face is a combinatorial polygon of length alg + /** Tests if a face is a combinatorial polygon of length alg * (a cycle of alg darts beta1 links together). * @param adart an initial dart * @return true iff the face containing adart is a polygon of length alg. @@ -3794,7 +3794,7 @@ namespace CGAL { return (nb==alg); } - /** Create a triangle given 3 Attribute_descriptor<0>. + /** Creates a triangle given 3 Attribute_descriptor<0>. * @param h0 the first descriptor. * @param h1 the second descriptor. * @param h2 the third descriptor. @@ -3814,7 +3814,7 @@ namespace CGAL { return d1; } - /** Create a quadrangle given 4 Vertex_attribute_descriptor. + /** Creates a quadrangle given 4 Vertex_attribute_descriptor. * @param h0 the first vertex descriptor. * @param h1 the second vertex descriptor. * @param h2 the third vertex descriptor. @@ -3837,7 +3837,7 @@ namespace CGAL { return d1; } - /** Create a combinatorial tetrahedron from 4 triangles. + /** Creates a combinatorial tetrahedron from 4 triangles. * @param d1 a dart onto a first triangle. * @param d2 a dart onto a second triangle. * @param d3 a dart onto a third triangle. @@ -3859,7 +3859,7 @@ namespace CGAL { return d1; } - /** Test if a volume is a combinatorial tetrahedron. + /** Tests if a volume is a combinatorial tetrahedron. * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial tetrahedron. */ @@ -3892,7 +3892,7 @@ namespace CGAL { return true; } - /** Create a new combinatorial tetrahedron. + /** Creates a new combinatorial tetrahedron. * @return a new dart. */ Dart_descriptor make_combinatorial_tetrahedron() @@ -3905,7 +3905,7 @@ namespace CGAL { return make_combinatorial_tetrahedron(d1, d2, d3, d4); } - /** Create a combinatorial hexahedron from 6 quadrilaterals. + /** Creates a combinatorial hexahedron from 6 quadrilaterals. * @param d1 a dart onto a first quadrilateral. * @param d2 a dart onto a second quadrilateral. * @param d3 a dart onto a third quadrilateral. @@ -3952,7 +3952,7 @@ namespace CGAL { return d1; } - /** Test if a volume is a combinatorial hexahedron. + /** Tests if a volume is a combinatorial hexahedron. * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial hexahedron. */ @@ -4004,7 +4004,7 @@ namespace CGAL { return true; } - /** Create a new combinatorial hexahedron. + /** Creates a new combinatorial hexahedron. * @return a new dart. */ Dart_descriptor make_combinatorial_hexahedron() @@ -4019,9 +4019,9 @@ namespace CGAL { return make_combinatorial_hexahedron(d1, d2, d3, d4, d5, d6); } - /** Test if a volume is a combinatorial prism. + /** Tests if a volume is a combinatorial prism. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial prism. + * @return true iff the volume containing d1 is a combinatorial prism. */ bool is_volume_combinatorial_prism(Dart_const_descriptor d1) const { @@ -4062,7 +4062,7 @@ namespace CGAL { return true; } - /** Create a combinatorial prism from 2 triangles and 3 squares. + /** Creates a combinatorial prism from 2 triangles and 3 squares. * @param d1 a dart onto a first triangle. * @param d2 a dart onto a first square. * @param d3 a dart onto a second square. @@ -4094,7 +4094,7 @@ namespace CGAL { return d1; } - /** Create a new combinatorial prism. + /** Creates a new combinatorial prism. * @return a new dart. */ Dart_descriptor make_combinatorial_prism() @@ -4108,7 +4108,7 @@ namespace CGAL { return make_combinatorial_prism( d1, d2, d3, d4, d5); } - /** Test if a volume is a combinatorial pyramid. + /** Tests if a volume is a combinatorial pyramid. * @param d1 an intial dart * @return true iff the volume containing adart is a combinatorial pyramid. */ @@ -4150,7 +4150,7 @@ namespace CGAL { return true; } - /** Create a combinatorial pyramid from 1 square and 4 triangles. + /** Creates a combinatorial pyramid from 1 square and 4 triangles. * @param d1 a dart onto the square. * @param d2 a dart onto a first triangle. * @param d3 a dart onto a second triangle. @@ -4181,7 +4181,7 @@ namespace CGAL { return d1; } - /** Create a new combinatorial pyramid. + /** Creates a new combinatorial pyramid. * @return a new dart. */ Dart_descriptor make_combinatorial_pyramid() @@ -4195,7 +4195,7 @@ namespace CGAL { return make_combinatorial_pyramid(d1, d2, d3, d4, d5); } - /** Test if a volume is a combinatorial pentagonal prism. + /** Tests if a volume is a combinatorial pentagonal prism. * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial pentagonal prism. */ @@ -4260,7 +4260,7 @@ namespace CGAL { } - /** Test if a volume is a combinatorial hexagonal prism. + /** Tests if a volume is a combinatorial hexagonal prism. * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial hexagonal prism. */ @@ -4335,7 +4335,7 @@ namespace CGAL { return true; } - /** Test if a volume is a combinatorial tetrahedron10. + /** Tests if a volume is a combinatorial tetrahedron10. * @param d1 an initial dart * @return true iff the volume containing adart is a combinatorial tetrahedron10. */ @@ -4374,7 +4374,7 @@ namespace CGAL { return true; } - /** Test if an i-cell can be removed. + /** Tests if an i-cell can be removed. * An i-cell can be removed if i==dimension or i==dimension-1, * or if there are at most two (i+1)-cell incident to it. * @param adart a dart of the i-cell. @@ -4396,7 +4396,7 @@ namespace CGAL { run(*this,adart,update_attributes); } - /** Test if an i-cell can be contracted. + /** Tests if an i-cell can be contracted. * An i-cell can be contracted if i==1 * or if there are at most two (i-1)-cell incident to it. * @param adart a dart of the i-cell. @@ -4762,7 +4762,7 @@ namespace CGAL { return this->template beta<0>(adart1); } - /** Test if an edge can be inserted onto a 2-cell between two given darts. + /** Tests if an edge can be inserted onto a 2-cell between two given darts. * @param adart1 a first dart. * @param adart2 a second dart. * @return true iff an edge can be inserted between adart1 and adart2. @@ -4798,7 +4798,7 @@ namespace CGAL { return generic_insert_cell_1(adart1, adart2, false, update_attributes); } - /** Test if an edge can be inserted between two different 2-cells + /** Tests if an edge can be inserted between two different 2-cells * between two given darts. * @param adart1 a first dart. * @param adart2 a second dart. @@ -4982,7 +4982,7 @@ namespace CGAL { return this->template beta<0>(adart1); } - /** Test if a 2-cell can be inserted onto a given 3-cell along + /** Tests if a 2-cell can be inserted onto a given 3-cell along * a path of edges. * @param afirst iterator on the beginning of the path. * @param alast iterator on the end of the path. diff --git a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h index f62d36ff41d..fc4af01a588 100644 --- a/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h +++ b/Linear_cell_complex/include/CGAL/Linear_cell_complex_base.h @@ -213,7 +213,7 @@ namespace CGAL { return *this; } - /** Create a vertex attribute. + /** Creates a vertex attribute. * @return an handle on the new attribute. */ template @@ -221,7 +221,7 @@ namespace CGAL { { return Base::template create_attribute<0>(args...); } /** - * Create a new dart associated with an handle through an attribute. + * Creates a new dart associated with an handle through an attribute. * @param ahandle the point handle to associated with the dart. * @return a Dart_descriptor on the new dart. */ @@ -232,7 +232,7 @@ namespace CGAL { return res; } - /** Create a new dart associated with a point. + /** Creates a new dart associated with a point. * @param apoint the point to associated with the dart. * @return a Dart_descriptor on the new dart. */ @@ -307,7 +307,7 @@ namespace CGAL { return point_of_vertex_attribute(this->template attribute<0>(adart)); } - /** Test if the lcc is valid. + /** Tests if the lcc is valid. * A Linear_cell_complex is valid if it is a valid Combinatorial_map with * an attribute associated to each dart. * @return true iff the map is valid. @@ -550,7 +550,7 @@ namespace CGAL { return res; } - /** Create a segment given 2 points. + /** Creates a segment given 2 points. * @param p0 the first point. * @param p1 the second point. * if closed==true, the edge has no 2-free dart. @@ -564,7 +564,7 @@ namespace CGAL { closed); } - /** Create a triangle given 3 points. + /** Creates a triangle given 3 points. * @param p0 the first point. * @param p1 the second point. * @param p2 the third point. @@ -579,7 +579,7 @@ namespace CGAL { create_vertex_attribute(p2)); } - /** Create a quadrangle given 4 points. + /** Creates a quadrangle given 4 points. * @param p0 the first point. * @param p1 the second point. * @param p2 the third point. @@ -598,7 +598,7 @@ namespace CGAL { } - /** Create a tetrahedron given 4 Vertex_attribute_descriptor. + /** Creates a tetrahedron given 4 Vertex_attribute_descriptor. * @param h0 the first vertex handle. * @param h1 the second vertex handle. * @param h2 the third vertex handle. @@ -619,7 +619,7 @@ namespace CGAL { return this->make_combinatorial_tetrahedron(d1, d2, d3, d4); } - /** Create a tetrahedron given 4 points. + /** Creates a tetrahedron given 4 points. * @param p0 the first point. * @param p1 the second point. * @param p2 the third point. @@ -638,7 +638,7 @@ namespace CGAL { create_vertex_attribute(p3)); } - /** Create an hexahedron given 8 Vertex_attribute_descriptor. + /** Creates an hexahedron given 8 Vertex_attribute_descriptor. * (8 vertices, 12 edges and 6 facets) * \verbatim * 4----7 @@ -678,7 +678,7 @@ namespace CGAL { return this->make_combinatorial_hexahedron(d1, d2, d3, d4, d5, d6); } - /** Create an hexahedron given 8 points. + /** Creates an hexahedron given 8 points. * \verbatim * 4----7 * /| /| @@ -717,7 +717,7 @@ namespace CGAL { create_vertex_attribute(p7)); } - /** Create a prism given 6 Vertex_attribute_descriptor. + /** Creates a prism given 6 Vertex_attribute_descriptor. * (6 vertices, 9 edges and 5 facets) * \verbatim * 3---4 @@ -751,7 +751,7 @@ namespace CGAL { return make_combinatorial_prism(d1, d2, d3, d4, d5); } - /** Create a prism given 6 points. + /** Creates a prism given 6 points. * \verbatim * 3---4 * |\ /| @@ -783,7 +783,7 @@ namespace CGAL { create_vertex_attribute(p5)); } - /** Create a pyramid given 5 Vertex_attribute_descriptor. + /** Creates a pyramid given 5 Vertex_attribute_descriptor. * (5 vertices, 8 edges and 5 facets) * \verbatim * 4 @@ -815,7 +815,7 @@ namespace CGAL { return make_combinatorial_pyramid(d1, d2, d3, d4, d5); } - /** Create a pyramid given 5 points. + /** Creates a pyramid given 5 points. * \verbatim * 4 * /|\ From 459fcf3c3f76bdcc9a90f03186117e4cb68ecae9 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Wed, 5 Nov 2025 20:46:02 +0100 Subject: [PATCH 25/30] adart -> d1 --- Combinatorial_map/include/CGAL/Combinatorial_map.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index a35053846aa..44d653e2c83 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -3861,7 +3861,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial tetrahedron. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial tetrahedron. + * @return true iff the volume containing d1 is a combinatorial tetrahedron. */ bool is_volume_combinatorial_tetrahedron(Dart_const_descriptor d1) const { @@ -3954,7 +3954,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial hexahedron. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial hexahedron. + * @return true iff the volume containing d1 is a combinatorial hexahedron. */ bool is_volume_combinatorial_hexahedron(Dart_const_descriptor d1) const { @@ -4110,7 +4110,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial pyramid. * @param d1 an intial dart - * @return true iff the volume containing adart is a combinatorial pyramid. + * @return true iff the volume containing d1 is a combinatorial pyramid. */ bool is_volume_combinatorial_pyramid(Dart_const_descriptor d1) const { @@ -4197,7 +4197,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial pentagonal prism. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial pentagonal prism. + * @return true iff the volume containing d1 is a combinatorial pentagonal prism. */ bool is_volume_combinatorial_pentagonal_prism(Dart_const_descriptor d1) const { @@ -4262,7 +4262,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial hexagonal prism. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial hexagonal prism. + * @return true iff the volume containing d1 is a combinatorial hexagonal prism. */ bool is_volume_combinatorial_hexagonal_prism(Dart_const_descriptor d1) const { @@ -4337,7 +4337,7 @@ namespace CGAL { /** Tests if a volume is a combinatorial tetrahedron10. * @param d1 an initial dart - * @return true iff the volume containing adart is a combinatorial tetrahedron10. + * @return true iff the volume containing d1 is a combinatorial tetrahedron10. */ bool is_volume_combinatorial_tetrahedron10(Dart_const_descriptor d1) const { From 828d57a41957daa7ce478d57a6f7e04da2dbc077 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 6 Nov 2025 09:45:20 +0100 Subject: [PATCH 26/30] Update Combinatorial_map/include/CGAL/Combinatorial_map.h Co-authored-by: Andreas Fabri --- Combinatorial_map/include/CGAL/Combinatorial_map.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Combinatorial_map/include/CGAL/Combinatorial_map.h b/Combinatorial_map/include/CGAL/Combinatorial_map.h index fe661377baa..a14c628f2ac 100644 --- a/Combinatorial_map/include/CGAL/Combinatorial_map.h +++ b/Combinatorial_map/include/CGAL/Combinatorial_map.h @@ -3710,7 +3710,7 @@ namespace CGAL { void set_automatic_attributes_management_without_correction(bool newval) { this->automatic_attributes_management = newval; } - /** Creates a half-edge. + /** Creates a halfedge. * @return a dart of the new half-edge. */ Dart_descriptor make_half_edge() From 546d0b2871cc6a12394e8f18850e56d644b6a48e Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 6 Nov 2025 18:14:22 +0100 Subject: [PATCH 27/30] verbs --- .../doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h index 6f7b4ae2c67..bf7f5fd4818 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h @@ -22,7 +22,7 @@ namespace IO { */ /** - * \brief Read a VTK legacy ASCII file and load it into a 3D + * \brief Reads a VTK legacy ASCII file and load it into a 3D * Linear_cell_complex. * \ingroup PkgLinearCellComplexRefIOVTK * @@ -44,7 +44,7 @@ bool read_VTK(const char* filename, std::vector* volume_scalars); /** - * \brief Write a 3D Linear_cell_complex to a VTK legacy ASCII file. + * \brief Writes a 3D Linear_cell_complex to a VTK legacy ASCII file. * \ingroup PkgLinearCellComplexRefIOVTK * * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> From 76552ccca132b5d77c7c573580eb26faf7af8c68 Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Thu, 6 Nov 2025 18:16:43 +0100 Subject: [PATCH 28/30] class name --- .../doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h index bf7f5fd4818..48755d80425 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h @@ -26,7 +26,7 @@ namespace IO { * Linear_cell_complex. * \ingroup PkgLinearCellComplexRefIOVTK * - * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam LCC must be a `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` * \tparam VertexScalarType Type for vertex scalar data (default: float) * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param filename Path to the VTK file @@ -47,7 +47,7 @@ bool read_VTK(const char* filename, * \brief Writes a 3D Linear_cell_complex to a VTK legacy ASCII file. * \ingroup PkgLinearCellComplexRefIOVTK * - * \tparam LCC must be a Linear_cell_complex_for_combinatorial_map<3,3> + * \tparam LCC must be a `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` * \tparam VertexScalarType Type for vertex scalar data (default: float) * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param filename Path to the output VTK file From eb14bf2a1727dcbc2e221d98ca447dfe6793b756 Mon Sep 17 00:00:00 2001 From: Sebastien Loriot Date: Thu, 20 Nov 2025 13:23:26 +0100 Subject: [PATCH 29/30] backticks and rephrasing Co-authored-by: Mael --- Combinatorial_map/include/CGAL/Element_topo.h | 2 +- .../Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h | 8 ++++---- .../doc/Linear_cell_complex/Linear_cell_complex.txt | 6 +++--- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/Combinatorial_map/include/CGAL/Element_topo.h b/Combinatorial_map/include/CGAL/Element_topo.h index 4ef5d0c1776..f37a18c6278 100644 --- a/Combinatorial_map/include/CGAL/Element_topo.h +++ b/Combinatorial_map/include/CGAL/Element_topo.h @@ -78,7 +78,7 @@ cell_topo topo_from_name(const std::string& t) } /** - * @brief To get the type of dimD cell of the CMap of cmapdim dimension. + * @brief To get the type of `dimD` cell of the `CMap` of `cmapdim` dimension. */ template diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h index 48755d80425..07f6dd4327c 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h @@ -6,7 +6,7 @@ namespace IO { * format. * * Only supports: - * - Linear_cell_complex_for_combinatorial_map<3,3> + * - `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` * - VTK legacy ASCII format (.vtk files) * - Optional scalar fields for vertices and volumes * @@ -23,14 +23,14 @@ namespace IO { /** * \brief Reads a VTK legacy ASCII file and load it into a 3D - * Linear_cell_complex. + * linear cell complex. * \ingroup PkgLinearCellComplexRefIOVTK * * \tparam LCC must be a `CGAL::Linear_cell_complex_for_combinatorial_map<3,3>` * \tparam VertexScalarType Type for vertex scalar data (default: float) * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param filename Path to the VTK file - * \param alcc The Linear_cell_complex to populate (will be cleared first) + * \param alcc The linear cell complex to populate (will be cleared first) * \param vertex_scalars Optional output vector to store per-vertex scalar values. * If provided, will be resized to match number of vertices. * \param volume_scalars Optional output vector to store per-volume scalar values. @@ -51,7 +51,7 @@ bool read_VTK(const char* filename, * \tparam VertexScalarType Type for vertex scalar data (default: float) * \tparam VolumeScalarType Type for volume scalar data (default: float) * \param filename Path to the output VTK file - * \param alcc The Linear_cell_complex to export + * \param alcc The linear cell complex to export * \param vertex_scalars Optional per-vertex scalar data. If provided, must have * same size as number of vertex attributes in the LCC. * \param volume_scalars Optional per-volume scalar data. If provided, must have diff --git a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt index 0a04ceb347d..94672f31b71 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt +++ b/Linear_cell_complex/doc/Linear_cell_complex/Linear_cell_complex.txt @@ -289,15 +289,15 @@ The following example shows the use of \link GenericMap::insert_cell_1_between_t Result of the run of the linear_cell_complex_3_insert program. A window shows the 3D cube where one face has a hole. \cgalFigureEnd -\subsection Linear_cell_complexWriteVTK Write a Linear Cell Complex in a VTK File +\subsection Linear_cell_complexWriteVTK Writing a Linear Cell Complex to a VTK File \anchor ssecLCCWriteVtK -This example loads a 3D linear cell complex from a `.3map` file (using the `operator>>`). It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file with `CGAL::IO::write_VTK()`, using the computed values as scalars for each volume. +This example loads a 3D linear cell complex from a `.3map` file (using the `operator>>`). It computes for each 3-cell (volume) the number of incident vertices (0-cells), stores these values in a `std::vector`, and writes the result to a `.vtk` file using `CGAL::IO::write_VTK()`, with the computed values as scalars for each volume. \cgalExample{Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp} \cgalFigureBegin{fig_lcc_export_vtk,lcc-export-vtk.png} -Visualization of the VTK file generated by the linear_cell_complex_3_vtk_io program, using Paraview. Each volume is colored depending on its number of vertices. +Visualization of the VTK file generated by the `linear_cell_complex_3_vtk_io` program, using Paraview. Each volume is colored depending on its number of vertices. \cgalFigureEnd From fdf06fe9690af570d74b8d6c2f14b98e4487acec Mon Sep 17 00:00:00 2001 From: Guillaume Damiand Date: Fri, 21 Nov 2025 15:01:14 +0100 Subject: [PATCH 30/30] add default parameter --- .../Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h index 07f6dd4327c..8be086ed211 100644 --- a/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h +++ b/Linear_cell_complex/doc/Linear_cell_complex/CGAL/Linear_cell_complex/IO/VTK.h @@ -40,8 +40,8 @@ namespace IO { template bool read_VTK(const char* filename, LCC& alcc, - std::vector* vertex_scalars, - std::vector* volume_scalars); + std::vector* vertex_scalars=nullptr, + std::vector* volume_scalars=nullptr); /** * \brief Writes a 3D Linear_cell_complex to a VTK legacy ASCII file. @@ -61,8 +61,8 @@ bool read_VTK(const char* filename, template bool write_VTK(const char* filename, const LCC& alcc, - const std::vector* vertex_scalars, - const std::vector* volume_scalars); + const std::vector* vertex_scalars=nullptr, + const std::vector* volume_scalars=nullptr); } // namespace IO } // namespace CGAL