//
//  glgrav - OpenGL N-Body gravity simulator
//
//  Copyright (C) 2003  Ian Cowburn (ianc@noddybox.demon.co.uk)
//
//  This program 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 2 of the License, or
//  (at your option) any later version.
//
//  This program 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 this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  -------------------------------------------------------------------------
//
//  3D Vector
//
// $Id$
//
#ifndef VEC3D_H

#define VEC3D_H

#include "global.h"

class Vec3D
{
public:
    Vec3D();
    Vec3D(double dx, double dy, double dz);
    virtual ~Vec3D();

    void Set(double dx, double dy ,double dz);

    double dx() const;
    double dy() const;
    double dz() const;

    bool IsNull() const;

    double Length() const;

    void Normalise();
    void SetLength(double d);

    void AddScalar(double d);
    void Minus();
    void Scale(double d);

    void Add(const Vec3D& v);
    void Subtract(const Vec3D& v);
    void Scale(const Vec3D& v);

    double DotProduct(const Vec3D& v);
    Vec3D CrossProduct(const Vec3D& v);

private:
    double	m_dx;
    double	m_dy;
    double	m_dz;
};

#endif

// END OF FILE //