| // SPDX-License-Identifier: LGPL-2.1-or-later | |
| /*************************************************************************** | |
| * Copyright (c) 2017 Lorenz Lechner * | |
| * * | |
| * This file is part of the FreeCAD CAx development system. * | |
| * * | |
| * This library is free software; you can redistribute it and/or * | |
| * modify it under the terms of the GNU Library General Public * | |
| * License as published by the Free Software Foundation; either * | |
| * version 2 of the License, or (at your option) any later version. * | |
| * * | |
| * This library is distributed in the hope that it will be useful, * | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of * | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * | |
| * GNU Library General Public License for more details. * | |
| * * | |
| * You should have received a copy of the GNU Library General Public * | |
| * License along with this library; see the file COPYING.LIB. If not, * | |
| * write to the Free Software Foundation, Inc., 59 Temple Place, * | |
| * Suite 330, Boston, MA 02111-1307, USA * | |
| * * | |
| ***************************************************************************/ | |
| // idea: | |
| // - unwrap any meshed shells and output a 2d face (meshing is done externally) | |
| // - unwrap faces which are nurbs and return nurbs (no cuts, meshing internally) | |
| // - TODO: map any curves from origin to flattened faces | |
| // clang-format off | |
| using Vector3 = Eigen::Vector3d; | |
| using Vector2 = Eigen::Vector2d; | |
| template <typename type, unsigned int size> | |
| using ColMat = Eigen::Matrix<type, Eigen::Dynamic, size>; | |
| template <typename type, unsigned int size> | |
| using RowMat = Eigen::Matrix<type, size, Eigen::Dynamic>; | |
| using trip = Eigen::Triplet<double>; | |
| using spMat = Eigen::SparseMatrix<double>; | |
| std::vector<ColMat<double, 3>> getBoundaries(ColMat<double, 3> vertices, ColMat<long, 3> tris); | |
| class FaceUnwrapper{ | |
| nurbs::NurbsBase2D nu; | |
| public: | |
| FaceUnwrapper() = default; | |
| FaceUnwrapper(const TopoDS_Face & face); | |
| FaceUnwrapper(ColMat<double, 3> xyz_nodes, ColMat<long, 3> tris); | |
| void findFlatNodes(int steps, double val); | |
| ColMat<double, 3> interpolateFlatFace(const TopoDS_Face& face); | |
| std::vector<ColMat<double, 3>> getFlatBoundaryNodes(); | |
| bool use_nurbs = true; | |
| // the mesh | |
| ColMat<long, 3> tris; // input | |
| ColMat<long, 1> fixed_nodes; // input | |
| ColMat<double, 3> xyz_nodes; // compute from uv_mesh (xyz = A * poles) | |
| ColMat<double, 2> uv_nodes; // input | |
| ColMat<double, 2> ze_nodes; // compute | |
| // nurbs | |
| ColMat<double, 2> ze_poles; // compute | |
| spMat A; // mapping between nurbs(poles) and mesh(vertices) computed with nurbs-basis-functions and uv_mesh | |
| }; | |
| // clang-format on | |