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removePoints.H

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00001 /*---------------------------------------------------------------------------*\
00002   =========                 |
00003   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
00004    \\    /   O peration     |
00005     \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
00006      \\/     M anipulation  |
00007 -------------------------------------------------------------------------------
00008 License
00009     This file is part of OpenFOAM.
00010 
00011     OpenFOAM is free software: you can redistribute it and/or modify it
00012     under the terms of the GNU General Public License as published by
00013     the Free Software Foundation, either version 3 of the License, or
00014     (at your option) any later version.
00015 
00016     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
00017     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00018     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
00019     for more details.
00020 
00021     You should have received a copy of the GNU General Public License
00022     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
00023 
00024 Class
00025     Foam::removePoints
00026 
00027 Description
00028     Removes selected points from mesh and updates faces using these
00029     points.
00030 
00031 SourceFiles
00032     removePoints.C
00033 
00034 \*---------------------------------------------------------------------------*/
00035 
00036 #ifndef removePoints_H
00037 #define removePoints_H
00038 
00039 #include <OpenFOAM/typeInfo.H>
00040 #include <OpenFOAM/boolList.H>
00041 #include <OpenFOAM/pointField.H>
00042 #include <OpenFOAM/faceList.H>
00043 
00044 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00045 
00046 namespace Foam
00047 {
00048 
00049 // Forward declaration of classes
00050 class polyMesh;
00051 class polyTopoChange;
00052 class mapPolyMesh;
00053 class face;
00054 
00055 /*---------------------------------------------------------------------------*\
00056                            Class removePoints Declaration
00057 \*---------------------------------------------------------------------------*/
00058 
00059 class removePoints
00060 {
00061 
00062     // Private classes
00063 
00064         //- Combine-reduce operator to combine data on faces. Takes care
00065         //  of reverse orientation on coupled face.
00066         template <class T, template<class> class CombineOp>
00067         class faceEqOp
00068         {
00069 
00070         public:
00071 
00072             void operator()(List<T>& x, const List<T>& y) const
00073             {
00074                 if (y.size() > 0)
00075                 {
00076                     if (x.empty())
00077                     {
00078                         x = y;
00079                     }
00080                     else
00081                     {
00082                         label j = 0;
00083                         forAll(x, i)
00084                         {
00085                             CombineOp<T>()(x[i], y[j]);
00086                             j = y.rcIndex(j);
00087                         }
00088                     }
00089                 }
00090             }
00091         };
00092 
00093 
00094     // Private data
00095 
00096         //- Reference to mesh
00097         const polyMesh& mesh_;
00098 
00099         //- Whether undoable
00100         const bool undoable_;
00101 
00102         //- If undoable: deleted points
00103         pointField savedPoints_;
00104 
00105         //- If undoable: per stored face the original mesh face label
00106         labelList savedFaceLabels_;
00107 
00108         //- If undoable: per stored face the vertices. Negative indices
00109         //  refer to deletedPoints_
00110         faceList savedFaces_;
00111 
00112 
00113     // Private Member Functions
00114 
00115         //- Change the vertices of the face whilst keeping everything else
00116         //  (patch, zone) the same.
00117         void modifyFace
00118         (
00119             const label faceI,
00120             const face&,
00121             polyTopoChange&
00122         ) const;
00123 
00124 
00125         //- Disallow default bitwise copy construct
00126         removePoints(const removePoints&);
00127 
00128         //- Disallow default bitwise assignment
00129         void operator=(const removePoints&);
00130 
00131 public:
00132 
00133     //- Runtime type information
00134     ClassName("removePoints");
00135 
00136 
00137     // Constructors
00138 
00139         //- Construct from mesh
00140         removePoints(const polyMesh& mesh, const bool undoable = false);
00141 
00142 
00143     // Member Functions
00144 
00145             //- If undoable: affected face labels. Already restored faces
00146             //  will be -1.
00147             const labelList& savedFaceLabels() const
00148             {
00149                 return savedFaceLabels_;
00150             }
00151 
00152 
00153         // Helper functions
00154 
00155             //- Mark in pointCanBeDeleted the points that can be deleted
00156             //  (parallel synchronised) and returns the global number of these
00157             //  points. (this number is the global number before synchronisation
00158             //  so might be off!)
00159             //  A point can be deleted if
00160             //  - it is not used by any edge.
00161             //  or
00162             //  - is not used by an internal edge
00163             //  - is used by only two boundary edges. (note that these two
00164             //    edges will always be boundary ones!)
00165             //  - these two edges are sufficiently in line (cos > minCos)
00166             //  - all processors agree that point can be deleted.
00167             label countPointUsage
00168             (
00169                 const scalar minCos,
00170                 boolList& pointCanBeDeleted
00171             ) const;
00172 
00173         // Topology changes
00174 
00175             //- Play commands into polyTopoChange to remove points. Gets
00176             //  boolList (output of countPointUsage) as input.
00177             //  Does no check for whether resulting face is legal.
00178             //  Since pointCanBeDeleted is synced all coupled faces should
00179             //  decide the same.
00180             void setRefinement(const boolList&, polyTopoChange&);
00181 
00182             //- Force recalculation of locally stored data on topological change
00183             void updateMesh(const mapPolyMesh&);
00184 
00185             //- Given set of faces to restore calculates a consistent set of
00186             //  saved faces (indices into savedFaces_) and saved vertices
00187             //  (indices into savedPoints_) to restore. The undoFaces have to
00188             //  be synced.
00189             void getUnrefimentSet
00190             (
00191                 const labelList& undoFaces,
00192                 labelList& localFaces,
00193                 labelList& localPoints
00194             ) const;
00195 
00196             //- Restore selected faces and vertices.
00197             void setUnrefinement
00198             (
00199                 const labelList& localFaces,
00200                 const labelList& localPoints,
00201                 polyTopoChange&
00202             );
00203 };
00204 
00205 
00206 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00207 
00208 } // End namespace Foam
00209 
00210 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
00211 
00212 #endif
00213 
00214 // ************************ vim: set sw=4 sts=4 et: ************************ //
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