intersection.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    Copyright (C) 2011-2015 OpenFOAM Foundation
    Copyright (C) 2017 OpenCFD Ltd.
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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
    (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
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Class
    Foam::intersection
 
Description
    Foam::intersection
 
SourceFiles
    intersection.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef intersection_H
#define intersection_H
 
#include "scalar.H"
#include "Enum.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                        Class intersection Declaration
\*---------------------------------------------------------------------------*/
 
class intersection
{
private:
 
    // Static data
 
        //- Relative tolerance for point in a plane.
        //  The tolerance is relative to the object size.
        //  Used to determine if a half-ray from a point in plane of triangle
        // intersects the triangle or not.
        static scalar planarTol_;
 
public:
 
    enum direction
    {
        VECTOR,
        CONTACT_SPHERE
    };
 
    enum algorithm
    {
        FULL_RAY,        // Intersecting with full ray
        HALF_RAY,        // Intersecting with half ray
        VISIBLE          // Intersecting with the visible side
    };
 
    // Static Member Functions
 
        //- Direction names
        static const Enum<direction> directionNames_;
 
        //- Projection algorithm names
        static const Enum<algorithm> algorithmNames_;
 
        //- Return planar tolerance
        static scalar planarTol()
        {
            return planarTol_;
        }
 
        //- Set the planar tolerance, returning the previous value
        static scalar setPlanarTol(const scalar t)
        {
            if (t < -VSMALL)
            {
                FatalErrorInFunction
                    << abort(FatalError);
            }
 
            scalar oldTol = planarTol_;
            planarTol_ = t;
 
            return oldTol;
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //