mappedPatchBase.H

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/*---------------------------------------------------------------------------*\
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-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2020 OpenCFD Ltd.
-------------------------------------------------------------------------------
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/>.
 
Class
    Foam::mappedPatchBase
 
Description
    Determines a mapping between patch face centres and mesh cell or face
    centres and processors they're on.
 
    If constructed from dictionary:
    \verbatim
        // Optional world to sample (default is all)
        //sampleWorld solidSim;
 
        // Optional explicit coupling (requires functionObject to synchronise
        // databases. Default is close coupling (bc to bc)
        //sampleDatabase true;
 
        // Region to sample (default is region0)
        sampleRegion region0;
 
        // What to sample:
        // - nearestCell         : sample cell containing point
        // - nearestOnlyCell     : nearest sample cell (even if not containing
        //                         point)
        // - nearestPatchFace    : nearest face on selected patch
        // - nearestPatchFaceAMI : nearest face on selected patch
                                   - patches need not conform
                                   - uses AMI interpolation
        // - nearestFace         : nearest boundary face on any patch
        // - nearestPatchPoint   : nearest patch point (for coupled points
        //                         this might be any of the points so you have
        //                         to guarantee the point data is synchronised
        //                         beforehand)
        sampleMode nearestCell;
 
        // If sampleMode is nearestPatchFace : patch to find faces of
        samplePatch movingWall;
 
        // If sampleMode is nearestPatchFace : specify patchgroup to find
        // samplePatch and sampleRegion (if not provided)
        coupleGroup baffleGroup;
 
        // How to supply offset (w.r.t. my patch face centres):
        // - uniform : single offset vector
        // - nonuniform : per-face offset vector
        // - normal : using supplied distance and face normal
        offsetMode uniform;
 
        // According to offsetMode (see above) supply one of
        // offset, offsets or distance
        offset  (1 0 0);
    \endverbatim
 
    Note: if offsetMode is \c normal it uses outwards pointing normals. So
    supply a negative distance if sampling inside the domain.
 
Note
    Storage is not optimal. It temporary collects all (patch)face centres
    on all processors to keep the addressing calculation simple.
 
SourceFiles
    mappedPatchBase.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef mappedPatchBase_H
#define mappedPatchBase_H
 
#include "pointField.H"
#include "Tuple2.H"
#include "pointIndexHit.H"
#include "AMIPatchToPatchInterpolation.H"
#include "coupleGroupIdentifier.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
class polyPatch;
class polyMesh;
class mapDistribute;
 
/*---------------------------------------------------------------------------*\
                       Class mappedPatchBase Declaration
\*---------------------------------------------------------------------------*/
 
class mappedPatchBase
{
 
public:
 
    // Type enumerations
 
        //- Mesh items to sample
        enum sampleMode
        {
            NEARESTCELL,         
            NEARESTPATCHFACE,    
            NEARESTPATCHFACEAMI, 
            NEARESTPATCHPOINT,   
            NEARESTFACE,         
            NEARESTONLYCELL      
        };
 
        //- How to project face centres
        enum offsetMode
        {
            UNIFORM,            
            NONUNIFORM,         
            NORMAL              
        };
 
        static const Enum<sampleMode> sampleModeNames_;
 
        static const Enum<offsetMode> offsetModeNames_;
 
 
    //- Helper class for finding nearest
    //  Nearest:
    //  - point+local index
    //  - sqr(distance)
    //  - processor
    typedef Tuple2<pointIndexHit, Tuple2<scalar, label>> nearInfo;
 
    class nearestEqOp
    {
 
    public:
 
        void operator()(nearInfo& x, const nearInfo& y) const
        {
            if (y.first().hit())
            {
                if (!x.first().hit())
                {
                    x = y;
                }
                else if (y.second().first() < x.second().first())
                {
                    x = y;
                }
            }
        }
    };
 
    class maxProcEqOp
    {
 
    public:
 
        void operator()(nearInfo& x, const nearInfo& y) const
        {
            if (y.first().hit())
            {
                if (!x.first().hit())
                {
                    x = y;
                }
                else if (y.second().second() > x.second().second())
                {
                    x = y;
                }
            }
        }
    };
 
 
    //- nearest + world
    //  Used to only look at entries from same world
    typedef Tuple2<nearInfo, label> nearInfoWorld;
 
    class nearestWorldEqOp
    {
 
    public:
 
        void operator()(nearInfoWorld& x, const nearInfoWorld& y) const
        {
            // Is there a hit and is it sampling the same world
            const nearInfo& xi = x.first();
            const nearInfo& yi = y.first();
            if (yi.first().hit())
            {
                if (x.second() == y.second())
                {
                    if (!xi.first().hit())
                    {
                        x = y;
                    }
                    else if (yi.second().first() < xi.second().first())
                    {
                        x = y;
                    }
                }
            }
        }
    };
 
 
protected:
 
    // Protected data
 
        //- Patch to sample
        const polyPatch& patch_;
 
        //- World to sample
        mutable word sampleWorld_;
 
        //- Region to sample
        mutable word sampleRegion_;
 
        //- What to sample
        const sampleMode mode_;
 
        //- Patch (if in sampleMode NEARESTPATCH*)
        mutable word samplePatch_;
 
        //- PatchGroup (if in sampleMode NEARESTPATCH*)
        const coupleGroupIdentifier coupleGroup_;
 
        //- Empty or location of database
        const autoPtr<fileName> sampleDatabasePtr_;
 
        //- How to obtain samples
        offsetMode offsetMode_;
 
        //- Offset vector (uniform)
        vector offset_;
 
        //- Offset vector (nonuniform)
        vectorField offsets_;
 
        //- Offset distance (normal)
        scalar distance_;
 
        //- Communicator
        label comm_;
 
        //- Same region
        mutable bool sameRegion_;
 
 
        // Derived information
 
            //- Communication schedule:
            //
            //    - Cells/faces to sample per processor
            //    - Patch faces to receive per processor
            //    - schedule
            mutable autoPtr<mapDistribute> mapPtr_;
 
 
        // AMI interpolator (only for NEARESTPATCHFACEAMI)
 
            //- Flag to indicate that slave patch should be reversed for AMI
            const bool AMIReverse_;
 
            //- Pointer to AMI interpolator
            mutable autoPtr<AMIPatchToPatchInterpolation> AMIPtr_;
 
            //- Pointer to projection surface employed by AMI interpolator
            mutable autoPtr<searchableSurface> surfPtr_;
 
            //- Dictionary storing projection surface description
            dictionary surfDict_;
 
 
    // Protected Member Functions
 
        //- Optionally allocate a world-local communicator
        static label communicator(const word& sampleWorld);
 
        //- Lookup mesh
        const polyMesh& lookupMesh(const word& region) const;
 
        //- Lookup patch
        const polyPatch& lookupPatch
        (
            const word& sampleRegion,
            const word& samplePatch
        ) const;
 
 
        //- Get the points from face-centre-decomposition face centres
        //  and project them onto the face-diagonal-decomposition triangles.
        tmp<pointField> facePoints(const polyPatch&) const;
 
        //- Collect single list of samples and originating processor+face +
        //  wanted world
        void collectSamples
        (
            const label mySampleWorld,  // My wanted sampling world
            const pointField& facePoints,
            pointField& samples,        // Per sample: coordinate
            labelList& patchFaceWorlds, // Per sample: wanted world
            labelList& patchFaceProcs,  // Per sample: originating proc
            labelList& patchFaces,      // Per sample: originating face
            pointField& patchFc
        ) const;
 
        //- Find (local) cells/faces containing samples
        void findLocalSamples
        (
            const sampleMode mode,
            const label sampleWorld,        // my world as index
            const word& sampleRegion,
            const word& samplePatch,
            const pointField& samplePoints,
 
            List<nearInfoWorld>& nearest
        ) const;
 
        //- Find (global) cells/faces containing samples
        void findSamples
        (
            const sampleMode mode,      // search mode
            const label myWorldIndex,   // my world (in index form)
 
            const pointField&,
            const labelList& wantedWorlds,
            const labelList& origProcs, // per sample the originating proc
 
            labelList& sampleProcs,     // processor containing sample
            labelList& sampleIndices,   // local index of cell/face
            pointField& sampleLocations // actual representative location
        ) const;
 
        //- Get the sample points given the face points
        tmp<pointField> samplePoints(const pointField&) const;
 
        //- Calculate mapping
        void calcMapping() const;
 
        //- Calculate AMI interpolator
        void calcAMI() const;
 
 
        // Database handling
 
            //- Read optional database name from dictionary
            static autoPtr<fileName> readDatabase(const dictionary& dict);
 
            //- Lookup (sub)objectRegistry by following names of sub registries.
            //- Creates non-existing intermediate ones.
            static const objectRegistry& subRegistry
            (
                const objectRegistry& obr,
                const wordList& names,
                const label index
            );
 
            //- Attempt to detect an IOField<Type> and write to dictionary
            template<class Type>
            static bool writeIOField
            (
                const regIOobject& obj,
                dictionary& dict
            );
 
            //- Attempt to read an IOField<Type> and store on objectRegistry
            template<class Type>
            static bool constructIOField
            (
                const word& name,
                token& tok,
                Istream& is,
                objectRegistry& obr
            );
 
public:
 
    //- Runtime type information
    TypeName("mappedPatchBase");
 
 
    // Constructors
 
        //- Construct from patch
        explicit mappedPatchBase(const polyPatch&);
 
        //- Construct with offsetMode=non-uniform
        mappedPatchBase
        (
            const polyPatch& pp,
            const word& sampleRegion,
            const sampleMode sampleMode,
            const word& samplePatch,
            const vectorField& offsets
        );
 
        //- Construct from offsetMode=uniform
        mappedPatchBase
        (
            const polyPatch& pp,
            const word& sampleRegion,
            const sampleMode sampleMode,
            const word& samplePatch,
            const vector& offset
        );
 
        //- Construct from offsetMode=normal and distance
        mappedPatchBase
        (
            const polyPatch& pp,
            const word& sampleRegion,
            const sampleMode sampleMode,
            const word& samplePatch,
            const scalar distance
        );
 
        //- Construct from dictionary
        mappedPatchBase(const polyPatch&, const dictionary&);
 
        //- Construct from dictionary and (collocated) sample mode
        //  (only for nearestPatchFace, nearestPatchFaceAMI, nearestPatchPoint)
        //  Assumes zero offset.
        mappedPatchBase(const polyPatch&, const sampleMode, const dictionary&);
 
        //- Construct as copy, resetting patch
        mappedPatchBase(const polyPatch&, const mappedPatchBase&);
 
        //- Construct as copy, resetting patch, map original data
        mappedPatchBase
        (
            const polyPatch&,
            const mappedPatchBase&,
            const labelUList& mapAddressing
        );
 
 
    //- Destructor
    virtual ~mappedPatchBase();
 
 
    // Member functions
 
        void clearOut();
 
        // Access
 
            //- What to sample
            inline const sampleMode& mode() const;
 
            //- World to sample
            inline const word& sampleWorld() const;
 
            //- Region to sample
            inline const word& sampleRegion() const;
 
            //- Patch (only if NEARESTPATCHFACE)
            inline const word& samplePatch() const;
 
            //- PatchGroup (only if NEARESTPATCHFACE)
            inline const word& coupleGroup() const;
 
            //- Return size of mapped mesh/patch/boundary
            inline label sampleSize() const;
 
            //- Offset vector (from patch faces to destination mesh objects)
            inline const vector& offset() const;
 
            //- Offset vector (from patch faces to destination mesh objects)
            inline const vectorField& offsets() const;
 
            //- Communicator
            inline label comm() const;
 
            //- Is world the local world
            inline bool sameWorld() const;
 
            //- Cached sampleRegion != mesh.name()
            inline bool sameRegion() const;
 
            //- Return reference to the parallel distribution map
            inline const mapDistribute& map() const;
 
            //- Return reference to the AMI interpolator
            inline const AMIPatchToPatchInterpolation& AMI
            (
                const bool forceUpdate = false
            ) const;
 
            //- Return a pointer to the AMI projection surface
            const autoPtr<Foam::searchableSurface>& surfPtr() const;
 
            //- Get the region mesh
            const polyMesh& sampleMesh() const;
 
            //- Get the patch on the region
            const polyPatch& samplePolyPatch() const;
 
 
        // Helpers
 
            //- Get the sample points
            tmp<pointField> samplePoints() const;
 
            //- Get a point on the face given a face decomposition method:
            //  face-centre-tet : face centre. Returns index of face.
            //  face-planes     : face centre. Returns index of face.
            //  face-diagonal   : intersection of ray from cellcentre to
            //                    facecentre with any of the triangles.
            //                    Returns index (0..size-2) of triangle.
            static pointIndexHit facePoint
            (
                const polyMesh&,
                const label facei,
                const polyMesh::cellDecomposition
            );
 
        // For database storage
 
            inline const fileName& sampleDatabasePath() const
            {
                return *sampleDatabasePtr_;
            }
 
            inline bool sampleDatabase() const
            {
                return sampleDatabasePtr_.valid();
            }
 
            //- Helper: return path to store data to be sent to processor i
            static fileName sendPath(const fileName& root, const label proci);
 
            virtual fileName sendPath(const label proci) const;
 
            //- Helper: return path to store data to be received from
            //- processor i
            static fileName receivePath
            (
                const fileName& root,
                const label proci
            );
 
            virtual fileName receivePath(const label proci) const;
 
            //- Lookup (sub)objectRegistry from '/' separated path (relative to
            //- objectRegistry). Creates non-existing intermediate ones.
            static const objectRegistry& subRegistry
            (
                const objectRegistry& obr,
                const fileName& path
            );
 
            //- Store an IOField on the objectRegistry relative to obr
            template<class Type>
            static void storeField
            (
                objectRegistry& obr,
                const word& fieldName,
                const Field<Type>& values
            );
 
            //- Convert objectRegistry contents into dictionary
            static void writeDict
            (
                const objectRegistry& obr,
                dictionary& dict
            );
 
            //- (recursively) construct and register IOFields from dictionary
            static void readDict(const dictionary& d, objectRegistry& obr);
 
 
        // Distribute
 
            //- Wrapper around map/interpolate data distribution
            template<class Type>
            void distribute(List<Type>& lst) const;
 
            //- Wrapper around map/interpolate data distribution with operation
            template<class Type, class CombineOp>
            void distribute(List<Type>& lst, const CombineOp& cop) const;
 
            //- Wrapper around map/interpolate data distribution
            template<class Type>
            void reverseDistribute(List<Type>& lst) const;
 
            //- Wrapper around map/interpolate data distribution with operation
            template<class Type, class CombineOp>
            void reverseDistribute(List<Type>& lst, const CombineOp& cop) const;
 
 
        // I/O
 
            //- Write as a dictionary
            virtual void write(Ostream&) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "mappedPatchBaseI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "mappedPatchBaseTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //