boundSphere.H

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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
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    You should have received a copy of the GNU General Public License
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Description
    Functions for constructing bounding spheres of lists of points
 
SourceFiles
    boundSphere.C
    boundSphereTemplates.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef boundSphere_H
#define boundSphere_H
 
#include "point.H"
#include "Random.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
//- Return whether or not the given sphere is valid
inline bool isValidBoundSphere(const Tuple2<point, scalar>& sphere);
 
//- Compute a sphere of four points or less where every point intersects the
//  sphere's surface
template<class PointField>
Tuple2<point, scalar> intersectBoundSphere
(
    const PointField& ps,
    const FixedList<label, 4>& pis,
    const label nPs
);
 
//- Compute a bounding sphere of four points or less
template<class PointField>
Tuple2<point, scalar> trivialBoundSphere
(
    const PointField& ps,
    const FixedList<label, 4>& pis,
    const label nPs
);
 
//- Compute a bounding sphere for an arbitrary number of points recursively
//  using Weizl's algorithm
template<class PointField>
Tuple2<point, scalar> weizlBoundSphere
(
    const PointField& ps,
    List<label>& pis,
    const label nPs,
    FixedList<label, 4>& boundaryPis,
    const label nBoundaryPs
);
 
//- Compute a bounding sphere for an arbitrary number of points, and given an
//  engine with which to randomise Weizl's algorithm
template<class PointField>
Tuple2<point, scalar> boundSphere(const PointField& ps, Random& rndGen);
 
//- Compute a bounding sphere for an arbitrary number of points
template<class PointField>
Tuple2<point, scalar> boundSphere(const PointField& ps);
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "boundSphereTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //