/usr/include/freefoam/dynamicMesh/geomCellLooper.H is in libfreefoam-dev 0.1.0+dfsg-1build1.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ 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/>.
Class
Foam::geomCellLooper
Description
Implementation of cellLooper. Does pure geometric cut through cell.
Handles all cell shapes in the same way: cut edges with plane through
cell centre and normal in direction of provided direction. Snaps cuts
close to edge endpoints (close = snapTol * minEdgeLen) to vertices.
Currently determines cuts through edges (and edgeendpoints close to plane)
in random order and then sorts them acc. to angle. Could be converted to
use walk but problem is that face can be cut multiple times (since does
not need to be convex). Another problem is that edges parallel to plane
might not be cut. So these are handled by looking at the distance from
edge endpoints to the plane.
SourceFiles
geomCellLooper.C
\*---------------------------------------------------------------------------*/
#ifndef geomCellLooper_H
#define geomCellLooper_H
#include "cellLooper.H"
#include <OpenFOAM/typeInfo.H>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
// Forward declaration of classes
class plane;
/*---------------------------------------------------------------------------*\
Class geomCellLooper Declaration
\*---------------------------------------------------------------------------*/
class geomCellLooper
:
public cellLooper
{
// Static
//- Tolerance for point equal test. Fraction of edge length.
static const scalar pointEqualTol_;
//- Tolerance for cut through edges to get snapped to edge end point.
// Fraction of length of minimum connected edge length.
static scalar snapTol_;
// Private Member Functions
//- Min length of attached edges
scalar minEdgeLen(const label vertI) const;
//- Return true and set weight if edge is cut
bool cutEdge
(
const plane& cutPlane,
const label edgeI,
scalar& weight
) const;
//- Snaps cut through edge by cut through vertex (if weight closer than
// tol to 0 or 1). Returns vertex label snapped to or -1.
label snapToVert
(
const scalar tol,
const label edgeI,
const scalar weight
) const;
//- Gets two (random) vectors perpendicular to n and each other to be
// used as base.
void getBase
(
const vector& n,
vector& e0,
vector& e1
) const;
//- Return true if the cut edge at loop[index] is inbetween the cuts
// through the edge end points.
bool edgeEndsCut(const labelList&, const label index) const;
//- Disallow default bitwise copy construct
geomCellLooper(const geomCellLooper&);
//- Disallow default bitwise assignment
void operator=(const geomCellLooper&);
public:
//- Runtime type information
TypeName("geomCellLooper");
// Static Functions
static scalar snapTol()
{
return snapTol_;
}
static void setSnapTol(const scalar tol)
{
snapTol_ = tol;
}
// Constructors
//- Construct from components
geomCellLooper(const polyMesh& mesh);
// Destructor
virtual ~geomCellLooper();
// Member Functions
//- Create cut along circumference of cellI. Gets current mesh cuts.
// Cut along circumference is expressed as loop of cuts plus weights
// for cuts along edges (only valid for edge cuts).
// Return true if successful cut.
virtual bool cut
(
const vector& refDir,
const label cellI,
const boolList& vertIsCut,
const boolList& edgeIsCut,
const scalarField& edgeWeight,
labelList& loop,
scalarField& loopWeights
) const;
//- Same but now also base point of cut provided (instead of always
// cell centre)
virtual bool cut
(
const plane& cutPlane,
const label cellI,
const boolList& vertIsCut,
const boolList& edgeIsCut,
const scalarField& edgeWeight,
labelList& loop,
scalarField& loopWeights
) const;
};
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
#endif
// ************************ vim: set sw=4 sts=4 et: ************************ //
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