isoSurfaceTopoTemplates.C

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// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
template<class Type>
Foam::tmp<Foam::Field<Type>>
Foam::isoSurfaceTopo::interpolate
(
    const Field<Type>& cellCoords,
    const Field<Type>& pointCoords
) const
{
    tmp<Field<Type>> tfld(new Field<Type>(pointToVerts_.size()));
    Field<Type>& fld = tfld.ref();
 
    forAll(pointToVerts_, i)
    {
        scalar s0;
        Type p0;
        {
            label v0 = pointToVerts_[i][0];
            if (v0 < mesh_.nPoints())
            {
                s0 = pVals_[v0];
                p0 = pointCoords[v0];
            }
            else
            {
                label celli = v0-mesh_.nPoints();
                s0 = cVals_[celli];
                p0 = cellCoords[celli];
            }
        }
 
        scalar s1;
        Type p1;
        {
            label v1 = pointToVerts_[i][1];
            if (v1 < mesh_.nPoints())
            {
                s1 = pVals_[v1];
                p1 = pointCoords[v1];
            }
            else
            {
                label celli = v1-mesh_.nPoints();
                s1 = cVals_[celli];
                p1 = cellCoords[celli];
            }
        }
 
        scalar d = s1-s0;
        if (mag(d) > VSMALL)
        {
            scalar s = (iso_-s0)/d;
            fld[i] = s*p1+(1.0-s)*p0;
        }
        else
        {
            fld[i] = 0.5*(p0+p1);
        }
    }
 
    return tfld;
}
 
 
// ************************************************************************* //