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ENH: Add concave cell checking

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This commit is contained in:
mattijs 2010-03-30 21:48:57 +01:00
parent 9bb6e5ac25
commit 883dbc2e2d
3 changed files with 160 additions and 12 deletions
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16
applications/utilities/mesh/manipulation/checkMesh/checkGeometry.C
View File

@ -291,6 +291,22 @@ Foam::label Foam::checkGeometry(const polyMesh& mesh, const bool allGeometry)
}
}
if (allGeometry)
{
cellSet cells(mesh, "concaveCells", mesh.nCells()/100);
if (mesh.checkConcaveCells(true, &cells))
{
noFailedChecks++;
label nCells = returnReduce(cells.size(), sumOp<label>());
Info<< " <<Writing " << nCells
<< " concave cells to set " << cells.name() << endl;
cells.instance() = mesh.pointsInstance();
cells.write();
}
}
return noFailedChecks;
}

21
src/OpenFOAM/meshes/primitiveMesh/primitiveMesh.H
View File

@ -8,10 +8,10 @@
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 2 of the License, or (at your
option) any later version.
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
@ -19,8 +19,7 @@ License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::primitiveMesh
@ -292,6 +291,9 @@ class primitiveMesh
//- Skewness warning threshold
static scalar skewThreshold_;
//- Threshold where faces are considered coplanar
static scalar planarCosAngle_;
protected:
@ -647,6 +649,13 @@ public:
labelHashSet* setPtr = NULL
) const;
//- Check for concave cells
bool checkConcaveCells
(
const bool report = false,
labelHashSet* setPtr = NULL
) const;
//- Check mesh topology for correctness.
// Returns false for no error.

135
src/OpenFOAM/meshes/primitiveMesh/primitiveMeshCheck/primitiveMeshCheck.C
View File

@ -8,10 +8,10 @@
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 2 of the License, or (at your
option) any later version.
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
@ -19,8 +19,7 @@ License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM; if not, write to the Free Software Foundation,
Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
@ -38,6 +37,7 @@ Foam::scalar Foam::primitiveMesh::closedThreshold_ = 1.0e-6;
Foam::scalar Foam::primitiveMesh::aspectThreshold_ = 1000;
Foam::scalar Foam::primitiveMesh::nonOrthThreshold_ = 70; // deg
Foam::scalar Foam::primitiveMesh::skewThreshold_ = 4;
Foam::scalar Foam::primitiveMesh::planarCosAngle_ = 1.0e-6;
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
@ -2094,6 +2094,129 @@ bool Foam::primitiveMesh::checkCellDeterminant
}
bool Foam::primitiveMesh::checkConcaveCells
(
const bool report,
labelHashSet* setPtr
) const
{
if (debug)
{
Info<< "bool primitiveMesh::checkConcaveCells(const bool"
<< ", labelHashSet*) const: "
<< "checking for concave cells" << endl;
}
const cellList& c = cells();
const labelList& fOwner = faceOwner();
const vectorField& fAreas = faceAreas();
const pointField& fCentres = faceCentres();
const pointField& pts = points();
label nConcaveCells = 0;
forAll (c, cellI)
{
const cell& cFaces = c[cellI];
const labelList& cPoints = cellPoints()[cellI];
bool concave = false;
forAll(cFaces, i)
{
if (concave)
{
break;
}
label fI = cFaces[i];
const point& fC = fCentres[fI];
const face& f = faces()[fI];
vector fN = fAreas[fI];
fN /= max(mag(fN), VSMALL);
// Flip normal if required so that it is always pointing out of
// the cell
if (fOwner[fI] != cellI)
{
fN *= -1;
}
// Is any vertex of the cell on the wrong side of the
// plane of this face?
forAll(cPoints, cPtI)
{
label ptI = cPoints[cPtI];
// Skip points that are on this face
if (findIndex(f, ptI) > -1)
{
continue;
}
const point& pt = pts[ptI];
// If the cell is concave, the point will be on the
// positive normal side of the plane of f, defined by
// its centre and normal, and the angle between (pt -
// fC) and fN will be less than 90 degrees, so the dot
// product will be positive.
vector pC = (pt - fC);
pC /= max(mag(pC), VSMALL);
if ((pC & fN) > -planarCosAngle_)
{
// Concave or planar face
concave = true;
if (setPtr)
{
setPtr->insert(cellI);
}
nConcaveCells++;
break;
}
}
}
}
reduce(nConcaveCells, sumOp<label>());
if (nConcaveCells > 0)
{
if (debug || report)
{
Info<< " ***Concave cells found, number of cells: "
<< nConcaveCells << endl;
}
return true;
}
else
{
if (debug || report)
{
Info<< " Concave cell check OK." << endl;
}
return false;
}
return false;
}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
bool Foam::primitiveMesh::checkTopology(const bool report) const