pyramid.H

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    Copyright (C) 2011 OpenFOAM Foundation
-------------------------------------------------------------------------------
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.
 
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    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::pyramid
 
Description
    A geometric pyramid primitive with a base of 'n' sides:
    i.e. a parametric pyramid. A pyramid is constructed from
    a base polygon and an apex point.
 
SourceFiles
    pyramidI.H
 
\*---------------------------------------------------------------------------*/
 
#ifndef pyramid_H
#define pyramid_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// Forward declaration of friend functions and operators
 
template<class Point, class PointRef, class polygonRef>
class pyramid;
 
template<class Point, class PointRef, class polygonRef>
inline Istream& operator>>
(
    Istream& is,
    pyramid<Point, PointRef, polygonRef>& p
);
 
template<class Point, class PointRef, class polygonRef>
inline Ostream& operator<<
(
    Ostream& os,
    const pyramid<Point, PointRef, polygonRef>& p
);
 
 
/*---------------------------------------------------------------------------*\
                           Class pyramid Declaration
\*---------------------------------------------------------------------------*/
 
template<class Point, class PointRef, class polygonRef>
class pyramid
{
    // Private data
 
        polygonRef base_;
        PointRef apex_;
 
 
public:
 
    // Constructors
 
        //- Construct from base polygon and apex point
        inline pyramid(polygonRef base, const Point& apex);
 
        //- Construct from Istream
        inline pyramid(Istream& is);
 
 
    // Member functions
 
        // Access
 
            //- Return apex point
            inline const Point& apex() const;
 
            //- Return base polygon
            inline polygonRef base() const;
 
 
        // Properties
 
            //- Return centre (centroid)
            inline Point centre(const UList<point>& points) const;
 
            //- Return height vector
            inline vector height(const UList<point>& points) const;
 
            //- Return scalar magnitude - returns volume of pyramid
            inline scalar mag(const UList<point>& points) const;
 
 
    // IOstream operators
 
        friend Istream& operator>> <Point, PointRef, polygonRef>
        (
            Istream& is,
            pyramid& p
        );
 
        friend Ostream& operator<< <Point, PointRef, polygonRef>
        (
            Ostream& os,
            const pyramid& p
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "pyramidI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //