| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2022-2023 OpenFOAM Foundation | |
| \\/ M anipulation | | |
| ------------------------------------------------------------------------------- | |
| License | |
| This file is part of OpenFOAM. | |
| OpenFOAM is free software: you can redistribute it and/or modify it | |
| under the terms of the GNU General Public License as published by | |
| the Free Software Foundation, either version 3 of the License, or | |
| (at your option) any later version. | |
| OpenFOAM 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 General Public License | |
| for more details. | |
| You should have received a copy of the GNU General Public License | |
| along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>. | |
| Namespace | |
| Foam::cutPoly | |
| Description | |
| Low level functions for cutting poly faces and cells | |
| Cutting a face using an iso-surface defined at the points is done by | |
| walking around the face. A start point is chosen and then the walk proceeds | |
| until a "cut" edge is found with points on either side of the iso-surface. | |
| This edge is noted and the walk continues until another cut edge is found. | |
| These two edge cuts, along with all points in-between, form a sub-face on | |
| one side of the iso-surface. This algorithm continues around the entire | |
| face, potentially cutting off multiple sub-faces. The remainder is a single | |
| contiguous face on the other side of the iso-surface. | |
| Cutting a cell is then done by walking from cut-edge to cut-edge around the | |
| cell's faces. | |
| SourceFiles | |
| cutPoly.C | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| namespace Foam | |
| { | |
| class OBJstream; | |
| namespace cutPoly | |
| { | |
| //- This flag determines which side of the iso-surface is separated into | |
| // multiple sub-faces, and which side is kept as the central contiguous face | |
| static const bool separatedBelow = true; | |
| //- Return the cuts for a given face. This returns a list of pairs of | |
| // face-edge indices. Both edges in the pair are cut, and connecting these | |
| // cuts creates an edge of the iso-surface. | |
| List<labelPair> faceCuts | |
| ( | |
| const face& f, | |
| const scalarField& pAlphas, | |
| const scalar isoAlpha | |
| ); | |
| //- Return the cuts for a given cell. This returns a list of lists of cell-edge | |
| // indices. Each sub-list represents a single closed loop of cell-edges. The | |
| // edges listed are all cut, and connecting these cuts up creates a face of | |
| // the iso-surface. | |
| labelListList cellCuts | |
| ( | |
| const cell& c, | |
| const cellEdgeAddressing& cAddr, | |
| const faceUList& fs, | |
| const List<List<labelPair>>& fCuts, | |
| const scalarField& pAlphas, | |
| const scalar isoAlpha | |
| ); | |
| //- Write the cuts for a given face to an OBJ file | |
| void writeFaceCuts | |
| ( | |
| const face& f, | |
| const List<labelPair>& fCuts, | |
| const pointField& ps, | |
| const scalarField& pAlphas, | |
| const scalar isoAlpha, | |
| OBJstream& obj | |
| ); | |
| //- Write the cuts for a given cell to an OBJ file | |
| void writeCellCuts | |
| ( | |
| const cell& c, | |
| const cellEdgeAddressing& cAddr, | |
| const List<List<label>>& cCuts, | |
| const faceList& fs, | |
| const pointField& ps, | |
| const scalarField& pAlphas, | |
| const scalar isoAlpha, | |
| OBJstream& obj | |
| ); | |
| } // End namespace cutPoly | |
| } // End namespace Foam | |
| // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // | |
| // ************************************************************************* // | |