uniformDistance.C

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    Copyright (C) 2018-2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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#include "uniformDistance.H"
#include "addToRunTimeSelectionTable.H"
#include "volumeType.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    defineTypeNameAndDebug(uniformDistance, 0);
    addToRunTimeSelectionTable(cellSizeFunction, uniformDistance, dictionary);
}

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::uniformDistance::uniformDistance
(
    const dictionary& initialPointsDict,
    const searchableSurface& surface,
    const scalar& defaultCellSize,
    const labelList regionIndices
)
:
    cellSizeFunction
    (
        typeName,
        initialPointsDict,
        surface,
        defaultCellSize,
        regionIndices
    ),
    distance_
    (
        coeffsDict().get<scalar>("distanceCoeff") * defaultCellSize
    ),
    distanceSqr_(sqr(distance_))
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //


bool Foam::uniformDistance::sizeLocations
(
    const pointIndexHit& hitPt,
    const vector& n,
    pointField& shapePts,
    scalarField& shapeSizes
) const
{
    const Foam::point& pt = hitPt.hitPoint();

    const scalar distanceCellSize =
        surfaceCellSizeFunction_().interpolate(pt, hitPt.index());

    if (sideMode_ == rmBothsides)
    {
        shapePts.resize(2);
        shapeSizes.resize(2);

        shapePts[0] = pt - n*distance_;
        shapePts[1] = pt + n*distance_;

        shapeSizes[0] = distanceCellSize;
        shapeSizes[1] = distanceCellSize;
    }
    else if (sideMode_ == smInside)
    {
        shapePts.resize(1);
        shapeSizes.resize(1);

        shapePts[0] = pt - n*distance_;
        shapeSizes[0] = distanceCellSize;
    }
    else if (sideMode_ == smOutside)
    {
        shapePts.resize(1);
        shapeSizes.resize(1);

        shapePts[0] = pt - n*distance_;
        shapeSizes[0] = distanceCellSize;
    }

    return false;
}


bool Foam::uniformDistance::cellSize
(
    const point& pt,
    scalar& size
) const
{
    size = 0;

    List<pointIndexHit> hits;

    surface_.findNearest
    (
        pointField(1, pt),
        scalarField(1, distanceSqr_),
        regionIndices_,
        hits
    );

    const pointIndexHit& hitInfo = hits[0];

    if (hitInfo.hit())
    {
        const point& hitPt = hitInfo.point();
        const label index = hitInfo.index();

        if (sideMode_ == rmBothsides)
        {
            size = surfaceCellSizeFunction_().interpolate(hitPt, index);

            return true;
        }

        // If the nearest point is essentially on the surface, do not do a
        // getVolumeType calculation, as it will be prone to error.
        if (hitInfo.point().dist(pt) < snapToSurfaceTol_)
        {
            size = surfaceCellSizeFunction_().interpolate(hitPt, index);

            return true;
        }

        pointField ptF(1, pt);
        List<volumeType> vTL;

        surface_.getVolumeType(ptF, vTL);

        bool functionApplied = false;

        if
        (
            sideMode_ == smInside
         && vTL[0] == volumeType::INSIDE
        )
        {
            size = surfaceCellSizeFunction_().interpolate(hitPt, index);

            functionApplied = true;
        }
        else if
        (
            sideMode_ == smOutside
         && vTL[0] == volumeType::OUTSIDE
        )
        {
            size = surfaceCellSizeFunction_().interpolate(hitPt, index);

            functionApplied = true;
        }

        return functionApplied;
    }

    return false;
}


bool Foam::uniformDistance::setCellSize
(
    const pointField& pts
)
{
//    labelHashSet surfaceAlreadyHit(surface_.size());
//
//    for (const Foam::point& pt : pts)
//    {
//        List<pointIndexHit> hits;
//
//        surface_.findNearest
//        (
//            pointField(1, pt),
//            scalarField(1, distanceSqr_),
//            regionIndices_,
//            hits
//        );
//
//        if (hits[0].hit() && !surfaceAlreadyHit.found(hits[0].index()))
//        {
//            surfaceCellSizeFunction_().refineSurfaceSize(hits[0].index());
//
//            surfaceAlreadyHit.insert(hits[0].index());
//        }
//    }
//
//    return true;

    return false;
}


// ************************************************************************* //