pointInCell.C

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     \\/     M anipulation  |
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License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
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    for more details.
 
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    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
 
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#include "pointInCell.H"
#include "polyMeshTetDecomposition.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
bool Foam::pointInCellFacePlanes
(
    const point& p,
    const polyMesh& mesh,
    const label celli
)
{
    const labelList& cFaces = mesh.cells()[celli];
 
    forAll(cFaces, cFacei)
    {
        const label facei = cFaces[cFacei];
        const bool isOwn = mesh.faceOwner()[facei] == celli;
 
        const vector normal =
            isOwn ? mesh.faceAreas()[facei] : - mesh.faceAreas()[facei];
 
        const vector proj = p - mesh.faceCentres()[facei];
 
        if ((normal & proj) > 0)
        {
            return false;
        }
    }
 
    return true;
}
 
 
bool Foam::pointInCellFaceCentreTris
(
    const point& p,
    const polyMesh& mesh,
    const label celli
)
{
    const cell& cFaces = mesh.cells()[celli];
 
    forAll(cFaces, cFacei)
    {
        const label facei = cFaces[cFacei];
        const face& f = mesh.faces()[facei];
        const point& fCentre = mesh.faceCentres()[facei];
        const bool isOwn = mesh.faceOwner()[facei] == celli;
 
        forAll(f, fPointi)
        {
            label pointi;
            label nextPointi;
            if (isOwn)
            {
                pointi = f[fPointi];
                nextPointi = f.nextLabel(fPointi);
            }
            else
            {
                pointi = f.nextLabel(fPointi);
                nextPointi = f[fPointi];
            }
 
            const triPointRef faceTri
            (
                mesh.points()[pointi],
                mesh.points()[nextPointi],
                fCentre
            );
 
            const vector proj = p - faceTri.centre();
 
            if ((faceTri.area() & proj) > 0)
            {
                return false;
            }
        }
    }
 
    return true;
}
 
 
bool Foam::pointInCellFaceDiagTris
(
    const point& p,
    const polyMesh& mesh,
    const label celli
)
{
    const cell& cFaces = mesh.cells()[celli];
 
    forAll(cFaces, cFacei)
    {
        const label facei = cFaces[cFacei];
        const face& f = mesh.faces()[facei];
 
        for (label tetPti = 1; tetPti < f.size() - 1; tetPti++)
        {
            const triPointRef faceTri =
                tetIndices(celli, facei, tetPti).faceTri(mesh);
 
            const vector proj = p - faceTri.centre();
 
            if ((faceTri.area() & proj) > 0)
            {
                return false;
            }
        }
    }
 
    return true;
}
 
 
bool Foam::pointInCellTets
(
    const point& p,
    const polyMesh& mesh,
    const label celli
)
{
    return polyMeshTetDecomposition::findTet(mesh, celli, p).face() != -1;
}
 
 
bool Foam::pointInCell
(
    const point& p,
    const polyMesh& mesh,
    const label celli,
    const pointInCellShapes cellShapes
)
{
    switch (cellShapes)
    {
        case pointInCellShapes::facePlanes:
            return pointInCellFacePlanes(p, mesh, celli);
        case pointInCellShapes::faceCentreTris:
            return pointInCellFaceCentreTris(p, mesh, celli);
        case pointInCellShapes::faceDiagonalTris:
            return pointInCellFaceDiagTris(p, mesh, celli);
        case pointInCellShapes::tets:
            return pointInCellTets(p, mesh, celli);
    }
 
    return false;
 
}
 
 
// ************************************************************************* //