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5648be03f0
- the blockMesh interface is splineEdge.H, selectable as "spline" The first tests look fine - it works as expected for the case with buggy polySpline reported on the forum. Should of course do some more extensive testing. The advantages compared to the current B-Spline implementation: - Doesn't need a matrix solver. - The coding resembles something that can be found in the literature. - In contrast to the B-Spline implementation, it is fairly clear what is actually going on. I don't even know if the B-Spline are actually B-Spline, Beta-Splines or something else. - Catmull-Rom splines seem to be what all the graphics people have as their stable workhorse. We now have 3 different names for splines in blockMesh: - "spline" - *new* Catmull-Rom for arbitrary segments. - "simpleSpline" - B-Spline for a single segment - "polySpline" - B-Spline for a multiple segments Assuming the Catmull-Rom splines continue to behave nicely, there is no reason to keep the other (broken) B-Splines. This would help clean up the blockMesh interface too. Placed the older ones under legacy/ for easier identification in the future. TODO: - currently no handling of non-zero end tangents - could be extended to handle closed loops, which might be useful for feature edges from CAD (eg, for the cvm mesher)
93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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\*---------------------------------------------------------------------------*/
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#include "simpleSplineEdge.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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defineTypeNameAndDebug(simpleSplineEdge, 0);
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addToRunTimeSelectionTable(curvedEdge, simpleSplineEdge, Istream);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::simpleSplineEdge::simpleSplineEdge
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(
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const pointField& points,
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const label start,
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const label end,
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const pointField& otherknots
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)
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:
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curvedEdge(points, start, end),
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BSpline(appendEndPoints(points, start, end, otherknots))
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{}
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Foam::simpleSplineEdge::simpleSplineEdge
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(
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const pointField& points,
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const label start,
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const label end,
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const pointField& otherknots,
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const vector& fstend,
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const vector& sndend
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)
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:
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curvedEdge(points, start, end),
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BSpline(appendEndPoints(points, start, end, otherknots), fstend, sndend)
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{}
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Foam::simpleSplineEdge::simpleSplineEdge(const pointField& points, Istream& is)
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:
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curvedEdge(points, is),
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BSpline(appendEndPoints(points, start_, end_, pointField(is)))
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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Foam::point Foam::simpleSplineEdge::position(const scalar mu) const
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{
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return BSpline::position(mu);
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}
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Foam::scalar Foam::simpleSplineEdge::length() const
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{
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notImplemented("simpleSplineEdge::length() const");
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return 1.0;
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}
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// ************************************************************************* //
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