AreaMoment.h

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#ifndef AREA_MOMENT_H_INCLUDED
#define AREA_MOMENT_H_INCLUDED
/*
 * Copyright 2011-2016 Universiteit Antwerpen
 *
 * Licensed under the EUPL, Version 1.1 or  as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at: http://ec.europa.eu/idabc/eupl5
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing
 * permissions and limitations under the Licence.
 */
namespace SimPT_Sim {

struct AreaMoment
{
        AreaMoment()
                : m_xx(0.0), m_xy(0.0), m_yy(0.0)
        {
        }

        AreaMoment(double xx, double xy, double yy)
                : m_xx(xx), m_xy(xy), m_yy(yy)
        {
        }

        AreaMoment& operator+=(const AreaMoment& rhs)
        {
                m_xx += rhs.m_xx; m_xy += rhs.m_xy; m_yy += rhs.m_yy;
                return *this;
        }

        AreaMoment& operator-=(const AreaMoment& rhs)
        {
                m_xx -= rhs.m_xx; m_xy -= rhs.m_xy; m_yy -= rhs.m_yy;
                return *this;
        }

        double   m_xx;
        double   m_xy;
        double   m_yy;
};

inline AreaMoment operator+(const AreaMoment& i1, const AreaMoment& i2)
{
        return AreaMoment(i1.m_xx + i2.m_xx, i1.m_xy + i2.m_xy, i1.m_yy + i2.m_yy);
}

inline AreaMoment operator-(const AreaMoment& i1, const AreaMoment& i2)
{
        return AreaMoment(i1.m_xx - i2.m_xx, i1.m_xy - i2.m_xy, i1.m_yy - i2.m_yy);
}

inline std::ostream& operator<<(std::ostream& os, const AreaMoment& i)
{
        os << "AreaMoment: {" << std::endl;
        os << "\t " << i.m_xx << " , " << i.m_xy << " , " << i.m_yy << std::endl;
        os << "}";
        return os;
}

} // namespace

#endif // end-of-include-guard