nearestCellsToCells.H

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/*---------------------------------------------------------------------------*\
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    \\  /    A nd           | Copyright (C) 2013-2023 OpenFOAM Foundation
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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
    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::cellsToCellss::nearest
 
Description
    Nearest cells-to-cells interpolation class.
 
SourceFiles
    nearestCellsToCells.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef nearestCellsToCells_H
#define nearestCellsToCells_H
 
#include "cellsToCells.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace cellsToCellss
{
 
/*---------------------------------------------------------------------------*\
                           Class nearest Declaration
\*---------------------------------------------------------------------------*/
 
class nearest
:
    public cellsToCells
{
private:
 
    // Private Member Functions
 
        //- Find indices of overlapping cells in src and tgt meshes - returns
        //  true if found a matching pair
        bool findInitialSeeds
        (
            const polyMesh& srcMesh,
            const polyMesh& tgtMesh,
            const labelList& srcCellIDs,
            const boolList& mapFlag,
            const label startSeedI,
            label& srcSeedI,
            label& tgtSeedI
        ) const;
 
        //- Calculate the mesh-to-mesh addressing and weights
        scalar calculateAddressing
        (
            const polyMesh& srcMesh,
            const polyMesh& tgtMesh,
            labelListList& srcToTgtCellAddr,
            scalarListList& srcToTgtCellWght,
            labelListList& tgtToSrcCellAddr,
            scalarListList& tgtToSrcCellWght,
            const label srcSeedI,
            const label tgtSeedI,
            const labelList& srcCellIDs,
            boolList& mapFlag,
            label& startSeedI
        );
 
        //- Find the nearest cell on mesh2 for cell1 on mesh1
        void findNearestCell
        (
            const polyMesh& mesh1,
            const polyMesh& mesh2,
            const label cell1,
            label& cell2
        ) const;
 
        //- Set the next cells for the marching front algorithm
        void setNextNearestCells
        (
            const polyMesh& srcMesh,
            const polyMesh& tgtMesh,
            label& startSeedI,
            label& srcCelli,
            label& tgtCelli,
            boolList& mapFlag,
            const labelList& srcCellIDs
        ) const;
 
        //- Find a source cell mapped to target cell tgtCelli
        label findMappedSrcCell
        (
            const polyMesh& srcMesh,
            const polyMesh& tgtMesh,
            const label tgtCelli,
            const List<DynamicList<label>>& tgtToSrc
        ) const;
 
 
protected:
 
    // Protected Member Functions
 
        // Intersection
 
            //- Calculate the addressing and weights
            virtual scalar calculate
            (
                const polyMesh& srcMesh,
                const polyMesh& tgtMesh
            );
 
            //- Normalise the weights for a given mesh
            virtual void normalise
            (
                const polyMesh& mesh,
                labelListList& localOtherCells,
                scalarListList& weights
            ) const;
 
 
public:
 
    //- Run-time type information
    TypeName("nearest");
 
 
    // Constructors
 
        //- Construct null
        nearest();
 
 
    //- Destructor
    virtual ~nearest();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace cellsToCellss
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //