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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2024 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
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/>.
\*---------------------------------------------------------------------------*/
#include "tracking.H"
#include "tetIndices.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace tracking
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
// Tetrahedra
//- Get the vertices of the current tet
inline void stationaryTetGeometry
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
vector& centre,
vector& base,
vector& vertex1,
vector& vertex2
);
//- Get the transformation associated with the current tet. This
// will convert a barycentric position within the tet to a
// cartesian position in the global coordinate system. The
// conversion is x = A & y, where x is the cartesian position, y is
// the barycentric position and A is the transformation tensor.
inline barycentricTensor stationaryTetTransform
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii
);
//- Get the vertices of the current moving tet. Two values are
// returned for each vertex. The first is a constant, and the
// second is a linear coefficient of the track fraction.
inline void movingTetGeometry
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
const scalar startStepFraction,
const scalar endStepFraction,
Pair<vector>& centre,
Pair<vector>& base,
Pair<vector>& vertex1,
Pair<vector>& vertex2
);
//- Get the transformation associated with the current, moving, tet.
// This is of the same form as for the static case. As with the
// moving geometry, a linear function of the tracking fraction is
// returned for each component.
inline Pair<barycentricTensor> movingTetTransform
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
const scalar startStepFraction,
const scalar endStepFraction
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace tracking
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
inline void Foam::tracking::stationaryTetGeometry
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
vector& centre,
vector& base,
vector& vertex1,
vector& vertex2
)
{
const triFace triIs(tetIndices(celli, facei, faceTrii).faceTriIs(mesh));
const vectorField& ccs = mesh.cellCentres();
const pointField& pts = mesh.points();
centre = ccs[celli];
base = pts[triIs[0]];
vertex1 = pts[triIs[1]];
vertex2 = pts[triIs[2]];
}
inline Foam::barycentricTensor Foam::tracking::stationaryTetTransform
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii
)
{
vector centre, base, vertex1, vertex2;
stationaryTetGeometry
(
mesh,
celli,
facei,
faceTrii,
centre,
base,
vertex1,
vertex2
);
return barycentricTensor(centre, base, vertex1, vertex2);
}
inline void Foam::tracking::movingTetGeometry
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
const scalar startStepFraction,
const scalar endStepFraction,
Pair<vector>& centre,
Pair<vector>& base,
Pair<vector>& vertex1,
Pair<vector>& vertex2
)
{
const triFace triIs(tetIndices(celli, facei, faceTrii).faceTriIs(mesh));
const pointField& ptsOld = mesh.oldPoints();
const pointField& ptsNew = mesh.points();
const vector ccOld = mesh.oldCellCentres()[celli];
const vector ccNew = mesh.cellCentres()[celli];
const scalar f0 = startStepFraction, f1 = endStepFraction;
centre[0] = ccOld + f0*(ccNew - ccOld);
base[0] = ptsOld[triIs[0]] + f0*(ptsNew[triIs[0]] - ptsOld[triIs[0]]);
vertex1[0] = ptsOld[triIs[1]] + f0*(ptsNew[triIs[1]] - ptsOld[triIs[1]]);
vertex2[0] = ptsOld[triIs[2]] + f0*(ptsNew[triIs[2]] - ptsOld[triIs[2]]);
centre[1] = f1*(ccNew - ccOld);
base[1] = f1*(ptsNew[triIs[0]] - ptsOld[triIs[0]]);
vertex1[1] = f1*(ptsNew[triIs[1]] - ptsOld[triIs[1]]);
vertex2[1] = f1*(ptsNew[triIs[2]] - ptsOld[triIs[2]]);
}
inline Foam::Pair<Foam::barycentricTensor> Foam::tracking::movingTetTransform
(
const polyMesh& mesh,
const label celli,
const label facei,
const label faceTrii,
const scalar startStepFraction,
const scalar endStepFraction
)
{
Pair<vector> centre, base, vertex1, vertex2;
movingTetGeometry
(
mesh,
celli,
facei,
faceTrii,
startStepFraction,
endStepFraction,
centre,
base,
vertex1,
vertex2
);
return
Pair<barycentricTensor>
(
barycentricTensor(centre[0], base[0], vertex1[0], vertex2[0]),
barycentricTensor(centre[1], base[1], vertex1[1], vertex2[1])
);
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
inline Foam::point Foam::tracking::position
(
const polyMesh& mesh,
const barycentric& coordinates,
const label celli,
const label facei,
const label faceTrii,
const scalar stepFraction
)
{
if (mesh.moving() && stepFraction != 1)
{
return
movingTetTransform(mesh, celli, facei, faceTrii, stepFraction, 1)[0]
& coordinates;
}
else
{
return
stationaryTetTransform(mesh, celli, facei, faceTrii)
& coordinates;
}
}
// ************************************************************************* //
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