tetDecomposer.H

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    Copyright (C) 2012-2016 OpenFOAM Foundation
    Copyright (C) 2018-2020,2024 OpenCFD Ltd.
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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
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    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
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Class
    Foam::tetDecomposer
 
Description
    Decomposes polyMesh into tets (or pyramids)
 
    Cells neighbouring decomposed cells are not decomposed themselves
    so will be polyhedral.
 
SourceFiles
    tetDecomposer.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef tetDecomposer_H
#define tetDecomposer_H
 
#include "DynamicList.H"
#include "bitSet.H"
#include "boolList.H"
#include "typeInfo.H"
#include "Enum.H"
#include "faceList.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class polyMesh;
class polyTopoChange;
class face;
class mapPolyMesh;
 
/*---------------------------------------------------------------------------*\
                           Class tetDecomposer Declaration
\*---------------------------------------------------------------------------*/
 
class tetDecomposer
{
public:
 
    // Public data types
 
        enum decompositionType
        {
            FACE_CENTRE_TRIS, //- Faces decomposed into triangles
                              //  using face-centre
            FACE_DIAG_TRIS,   //- Faces decomposed into triangles diagonally
            PYRAMID,          //- Faces not decomposed (generates pyramids)
            FACE_DIAG_QUADS   //- Like FACE_DIAG_TRIS but does quads mainly
        };
        static const Enum<decompositionType> decompositionTypeNames;
 
 
private:
 
    // Private data
 
        const polyMesh& mesh_;
 
        //- From cell to tet point
        labelList cellToPoint_;
 
        //- From face to tet point
        labelList faceToPoint_;
 
        // Per face, per point (faceCentre) or triangle (faceDiag)
        // the added tet on the owner side
        labelListList faceOwnerCells_;
 
        // Per face, per point (faceCentre) or triangle (faceDiag)
        // the added tet on the neighbour side
        labelListList faceNeighbourCells_;
 
 
    // Private Member Functions
 
        //- Modify a face
        void modifyFace
        (
            polyTopoChange& meshMod,
            const face& f,
            const label facei,
            const label own,
            const label nei,
            const label patchi,
            const label zoneI,
            const bool zoneFlip
        ) const;
 
        //- Add a face
        void addFace
        (
            polyTopoChange& meshMod,
            const face& f,
            const label facei,
            const label own,
            const label nei,
            const label masterPointID,
            const label masterEdgeID,
            const label masterFaceID,
            const label patchi,
            const label zoneI,
            const bool zoneFlip
        ) const;
 
        //- Work out triangle index given the starting vertex in the face
        label triIndex(const label facei, const label fp) const;
 
        //- Calculate triangulation of boundary faces
        void splitBoundaryFaces
        (
            List<faceList>& boundaryQuads,
            List<faceList>& boundaryTris
        ) const;
 
        //- Correct coupled faces to match up
        void relativeIndicesToFace
        (
            const bool doFlip,
            const face& meshFace,
            const faceList& indexLists,
            faceList& faces
        ) const;
 
        //- Calculate triangulation of any face
        void splitFace
        (
            const List<faceList>& boundaryQuads,
            const List<faceList>& boundaryTris,
            const label facei,
            const label patchi,
            label& quadi,
            faceList& quadFaces,
            label& trii,
            faceList& triFaces
        ) const;
 
        void splitFace
        (
            const List<faceList>& boundaryQuads,
            const List<faceList>& boundaryTris,
            const label facei,
            const label patchi,
            faceList& quadFaces,
            faceList& triFaces,
            faceList& subFaces
        ) const;
 
        //- No copy construct
        tetDecomposer(const tetDecomposer&) = delete;
 
        //- No copy assignment
        void operator=(const tetDecomposer&) = delete;
 
 
public:
 
    //- Runtime type information
    ClassName("tetDecomposer");
 
 
    // Constructors
 
        //- Construct from mesh
        tetDecomposer(const polyMesh&);
 
 
    // Member Functions
 
        // Access
 
            //- From cell to tet point
            const labelList& cellToPoint() const
            {
                return cellToPoint_;
            }
 
            //- From face to tet point (only for faceCentre)
            const labelList& faceToPoint() const
            {
                return faceToPoint_;
            }
 
 
            //- Per face, per point (faceCentre) or triangle (faceDiag)
            //  the added tet on the owner side. For non-face (pyramid)
            //  size 1.
            const labelListList& faceOwnerCells() const
            {
                return faceOwnerCells_;
            }
 
            //- Per face, per point (faceCentre) or triangle (faceDiag)
            //  the added tet on the neighbour side. For non-face (pyramid)
            //  size 1.
            const labelListList& faceNeighbourCells() const
            {
                return faceNeighbourCells_;
            }
 
 
        // Edit
 
            //- Insert all changes into meshMod to convert the polyMesh into
            //  subshapes (tets/prisms)
            void setRefinement
            (
                const decompositionType decomposeType,
                const bitSet& decomposeCell,
                polyTopoChange& meshMod
            );
 
            //- Insert all changes into meshMod to convert the polyMesh into
            //- subshapes (tets/prisms). Explicit control over which faces
            //- get decomposed. Can be used e.g. to not split triangles.
            void setRefinement
            (
                const decompositionType decomposeType,
                const bitSet& decomposeCell,
                const bitSet& decomposeFace,
                polyTopoChange& meshMod
            );
 
            //- Force recalculation of locally stored data on topological change
            void updateMesh(const mapPolyMesh&);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //