/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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
    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

Description

\*---------------------------------------------------------------------------*/

#include <OpenFOAM/IOstreams.H>

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

template<class Point, class PointRef, class polygonRef>
inline pyramid<Point, PointRef, polygonRef>::pyramid
(
    polygonRef base,
    const Point& apex
)
:
    base_(base),
    apex_(apex)
{}


template<class Point, class PointRef, class polygonRef>
inline pyramid<Point, PointRef, polygonRef>::pyramid(Istream& is)
{
    is >> base_ >> apex_;
    is.check("pyramid::pyramid(Istream& is)");
}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

template<class Point, class PointRef, class polygonRef>
inline const Point& pyramid<Point, PointRef, polygonRef>::apex() const
{
    return apex_;
}

template<class Point, class PointRef, class polygonRef>
inline polygonRef pyramid<Point, PointRef, polygonRef>::base() const
{
    return base_;
}


template<class Point, class PointRef, class polygonRef>
inline Point pyramid<Point, PointRef, polygonRef>::centre
(
    const pointField& points
) const
{
    return (3.0/4.0)*base_.centre(points) + (1.0/4.0)*apex_;
}


template<class Point, class PointRef, class polygonRef>
inline vector pyramid<Point, PointRef, polygonRef>::height
(
    const pointField& points
) const
{
    // Height = apex - baseCentroid
    return (apex_ - base_.centre(points));
}


template<class Point, class PointRef, class polygonRef>
inline scalar pyramid<Point, PointRef, polygonRef>::mag
(
    const pointField& points
) const
{
    return (1.0/3.0)*(base_.normal(points)&(height(points)));
}


// * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * * //

template<class Point, class PointRef, class polygonRef>
inline Istream& operator>>
(
    Istream& is,
    pyramid<Point, PointRef, polygonRef>& p
)
{
    is >> p.base_ >> p.apex_;
    is.check("Istream& operator>>(Istream&, pyramid&)");
    return is;
}


template<class Point, class PointRef, class polygonRef>
inline Ostream& operator<<
(
    Ostream& os,
    const pyramid<Point, PointRef, polygonRef>& p
)
{
    os << p.base_ << tab << p.apex_ << nl;
    return os;
}


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// ************************ vim: set sw=4 sts=4 et: ************************ //
