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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2020-2022 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 "MPLICface.H"
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::MPLICface::MPLICface(const bool unweighted)
:
unweighted_(unweighted)
{};
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
Foam::label Foam::MPLICface::cutFace
(
const labelList& f,
const labelList& faceEdges,
const pointField& points,
const boolList& isEdgeCutOld,
boolList& isEdgeCut,
label& faceEdgei,
const UList<scalar>& pointsAlpha,
const UList<vector>& pointsU,
const label facei,
const scalar target,
const bool ow
)
{
// Clear all the storage
cutPoints_.clear();
subPoints_.clear();
cutEdges_.clear();
subPointsU_.clear();
// Direction of face circulators
flipped_ = false;
label fp;
if (faceEdgei == -1)
{
const UIndirectList<scalar> fAlphas(pointsAlpha, f);
// Starting from this point on the face
fp = findMin(fAlphas);
flipped_ = ow ? false : true;
}
else
{
// Finding first index of the edge in the face point list
const label startPoint = faceEdgei;
// Pick up starting point and decide direction of circulators
const label fwd = f.fcIndex(startPoint);
const label back = f.rcIndex(startPoint);
const label lEdgeP = f[fwd] == f[f.fcIndex(faceEdgei)] ? fwd : back;
// Starting from this point on the face
fp = pointsAlpha[f[startPoint]] < pointsAlpha[f[lEdgeP]]
? startPoint : lEdgeP;
if
(
!(
(
lEdgeP == fwd
&& pointsAlpha[f[startPoint]] < pointsAlpha[f[lEdgeP]]
)
|| (
lEdgeP == back
&& pointsAlpha[f[startPoint]] > pointsAlpha[f[lEdgeP]]
)
)
)
{
flipped_ = true;
}
}
label nextFp, edgei;
if (flipped_)
{
nextFp = f.rcIndex(fp);
edgei = nextFp;
}
else
{
nextFp = f.fcIndex(fp);
edgei = fp;
}
forAll(f, i)
{
// Edge points field value
const scalar& fl = pointsAlpha[f[fp]];
const scalar& fk = pointsAlpha[f[nextFp]];
const point& pL = points[f[fp]];
const point& pK = points[f[nextFp]];
const label edg = faceEdges[edgei];
// Collect sub-point if the iso-value is bigger than target value
if (fl >= target && cutPoints_.size() > 0)
{
subPoints_.append(pL);
if (!unweighted_)
{
subPointsU_.append(pointsU[f[fp]]);
}
}
// Cut the edge
if
(
!isEdgeCutOld[edg]
&& ((fl < target && fk >= target) || (fl >= target && fk < target))
)
{
const scalar coeff = (target - fk)/(fl - fk);
const point cut = pK + coeff*(pL - pK);
if (!unweighted_)
{
subPointsU_.append
(
pointsU[f[nextFp]]
+ coeff*(pointsU[f[fp]] - pointsU[f[nextFp]])
);
}
cutPoints_.append(cut);
subPoints_.append(cut);
cutEdges_.append(edg);
isEdgeCut[edg] = true;
}
// Termination control
if (cutPoints_.size() == 2)
{
faceEdgei = edgei;
return 1;
}
if (flipped_)
{
fp = f.rcIndex(fp);
nextFp = f.rcIndex(fp);
edgei = nextFp;
}
else
{
fp = f.fcIndex(fp);
nextFp = f.fcIndex(fp);
edgei = fp;
}
}
return 0;
}
Foam::label Foam::MPLICface::cutFace
(
const UList<label>& f,
const UList<point>& points,
const UList<scalar>& pointsAlpha,
const UList<vector>& pointsU,
const scalar target,
const bool ow
)
{
// Clear all the storage
cutPoints_.clear();
subPoints_.clear();
subPointsU_.clear();
// Direction of face circulators
flipped_ = ow ? false : true;
const UIndirectList<scalar> fAlphas(pointsAlpha, f);
// Starting from point with minimum alpha value
label fp = findMin(fAlphas);
// Second point index
label nextFp = flipped_ ? f.rcIndex(fp) : f.fcIndex(fp);
forAll(f, i)
{
// Edge points field value
const scalar& fl = pointsAlpha[f[fp]];
const scalar& fk = pointsAlpha[f[nextFp]];
const point& pL = points[f[fp]];
const point& pK = points[f[nextFp]];
// Collect sub-point if the iso-value is bigger than target value
if (fl >= target && cutPoints_.size() > 0)
{
subPoints_.append(pL);
if (!unweighted_)
{
subPointsU_.append(pointsU[f[fp]]);
}
}
// Cut the edge
if ((fl < target && fk >= target) || (fl >= target && fk < target))
{
const scalar coeff = (target - fk)/(fl - fk);
const point cut = pK + coeff*(pL - pK);
if (!unweighted_)
{
subPointsU_.append
(
pointsU[f[nextFp]]
+ coeff*(pointsU[f[fp]] - pointsU[f[nextFp]])
);
}
cutPoints_.append(cut);
subPoints_.append(cut);
}
if (flipped_)
{
fp = f.rcIndex(fp);
nextFp = f.rcIndex(fp);
}
else
{
fp = f.fcIndex(fp);
nextFp = f.fcIndex(fp);
}
}
// Simple cut
if (cutPoints_.size() == 2)
{
return 1;
}
// Multiple cuts through the face
else if (cutPoints_.size() > 2)
{
return -1;
}
// No cut
else
{
return 0;
}
}
// ************************************************************************* //
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