geomDecomp.H

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    Copyright (C) 2018-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    the Free Software Foundation, either version 3 of the License, or
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Class
    Foam::geomDecomp
 
Description
    Base for geometrical domain decomposition methods
 
    Base coefficients:
    \table
        Property  | Description                             | Required | Default
        n         | (nx ny nz)                              | yes |
        order     | order of operation                      | no  | xyz
        delta     | delta (jitter) for rotation matrix      | no  | 0.001
        rotation  | coordinate rotation                     | no  |
    \endtable
 
SourceFiles
    geomDecomp.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef geomDecomp_H
#define geomDecomp_H
 
#include "decompositionMethod.H"
#include "cartesianCS.H"
#include "Vector.H"
#include "tmp.H"
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class geomDecomp Declaration
\*---------------------------------------------------------------------------*/
 
class geomDecomp
:
    public decompositionMethod
{
    // Private Data
 
        //- Small delta (default: 0.001) to avoid staggering when
        //- mesh itself is aligned with x/y/z
        scalar delta_;
 
        //- Local coordinates, or delta rotation tensor
        coordSystem::cartesian csys_;
 
 
    // Private Member Functions
 
        //- Convert ordering string ("xyz") into list of components.
        //  Checks for bad entries, but no check for duplicate entries.
        void setOrder();
 
        //- Read input values and initialize rotation matrix
        void readCoeffs();
 
 
protected:
 
    // Protected Data
 
        //- The divisions
        Vector<label> n_;
 
        //- Decomposition order in terms of components (optional)
        Vector<direction> order_;
 
        //- Coefficients for all derived methods
        const dictionary& coeffsDict_;
 
 
    // Protected Member Functions
 
        //- Apply delta (jitter) or rotation to coordinates
        tmp<pointField> adjustPoints(const pointField&) const;
 
        //- Check that mesh directions are compatible with decomposition
        void checkDecompositionDirections(const Vector<label>&) const;
 
 
public:
 
    // Constructors
 
        //- Construct for derived type name and decomposition dictionary
        geomDecomp
        (
            const word& derivedType,
            const dictionary& decompDict,
            int select = selectionType::DEFAULT
        );
 
        //- Construct for derived type name, decomposition dictionary
        //- and region name
        geomDecomp
        (
            const word& derivedType,
            const dictionary& decompDict,
            const word& regionName,
            int select = selectionType::DEFAULT
        );
 
 
    // Member Functions
 
        //- Return for every coordinate the wanted processor number.
        virtual labelList decompose
        (
            const pointField& points,
            const scalarField& pointWeights
        ) const = 0;
 
        //- Decompose with uniform weights on the points
        virtual labelList decompose(const pointField& points) const = 0;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //