c618e6a9d3
There was a bug in feature point handling. normals that were effectively parallel were not being picked up as being parallel, so a tolerance has been added as a static const.
139 lines
3.9 KiB
C++
139 lines
3.9 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) 2011 OpenFOAM Foundation
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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
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the Free Software Foundation, either version 3 of the License, or
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(at your 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, see <http://www.gnu.org/licenses/>.
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Class
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Foam::vectorTools
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Description
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Functions for analysing the relationships between vectors
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SourceFiles
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\*---------------------------------------------------------------------------*/
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#ifndef vectorTools_H
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#define vectorTools_H
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#include "vector.H"
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#include "unitConversion.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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/*---------------------------------------------------------------------------*\
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Namespace vectorTools Declaration
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\*---------------------------------------------------------------------------*/
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//- Collection of functions for testing relationships between two vectors.
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namespace vectorTools
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{
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//- Test if a and b are parallel: a.b = 1
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// Uses the cross product, so the tolerance is proportional to
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// the sine of the angle between a and b in radians
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template <typename T>
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bool areParallel
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(
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const Vector<T>& a,
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const Vector<T>& b,
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const T& tolerance = SMALL
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)
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{
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return (mag(a ^ b) < tolerance) ? true : false;
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// return ( mag( mag(a & b)/(mag(a)*mag(b)) - 1.0 ) < tolerance )
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// ? true
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// : false;
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}
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//- Test if a and b are orthogonal: a.b = 0
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// Uses the dot product, so the tolerance is proportional to
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// the cosine of the angle between a and b in radians
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template <typename T>
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bool areOrthogonal
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(
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const Vector<T>& a,
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const Vector<T>& b,
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const T& tolerance = SMALL
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)
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{
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return (mag(a & b) < tolerance) ? true : false;
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}
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//- Test if angle between a and b is acute: a.b > 0
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template <typename T>
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bool areAcute
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(
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const Vector<T>& a,
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const Vector<T>& b
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)
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{
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return ((a & b) > 0) ? true : false;
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}
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//- Test if angle between a and b is obtuse: a.b < 0
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template <typename T>
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bool areObtuse
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(
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const Vector<T>& a,
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const Vector<T>& b
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)
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{
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return ((a & b) < 0) ? true : false;
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}
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//- Calculate angle between a and b in radians
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template <typename T>
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T radAngleBetween
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(
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const Vector<T>& a,
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const Vector<T>& b,
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const T& tolerance = SMALL
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)
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{
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return Foam::acos( (a & b)/(mag(a)*mag(b) + tolerance) );
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}
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//- Calculate angle between a and b in degrees
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template <typename T>
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T degAngleBetween
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(
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const Vector<T>& a,
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const Vector<T>& b,
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const T& tolerance = SMALL
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)
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{
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return Foam::radToDeg(radAngleBetween(a, b, tolerance));
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}
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} // End namespace vectorTools
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************************************************************* //
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