aabb2.h

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/*
    Sheep - A Rigid Body Dynamics Engine
    Copyright (C) 2001-2004 Francois Beaune
    Contact: http://toxicengine.sourceforge.net/

    This file is part of Sheep.

    Sheep 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.

    Sheep 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 Sheep; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#ifndef SHEEP_MATH_AABB2_H
#define SHEEP_MATH_AABB2_H

#include "point2.h"
#include "real.h"
#include "vector2.h"

#include <limits>

namespace sheep {

    class AABB2 {
    public:
        Point2 m_min, m_max;

        //! Invalidate the AABB.
        AABB2();

        AABB2(const AABB2 &aabb);
        AABB2(const Point2 &min, const Point2 &max);

        //! Returns the largest possible bounding box.
        static AABB2 Biggest();

        void Invalidate();
        bool IsValid() const;

        void Include(const Point2 &point);
        void Include(const AABB2 &aabb);

        //! Warning, calling the Intersect() method may result
        //! in an invalid bounding box.
        void Intersect(const AABB2 &aabb);

        bool Overlaps(const AABB2 &aabb) const;
        bool Contains(const Point2 &point) const;

        Point2 GetCenter() const;
        Vector2 GetSize() const;

        //! Scales the box extent by a given factor on each axis without
        //! affecting the box center.
        void Scale(const Vector2 &scale);

        //! Offsets the box corners outward by a given amount on each
        //! axis, without affecting the box center.
        void Extend(const Vector2 &ext);
    };

#include "aabb2.inl"

}

#endif  // !SHEEP_MATH_AABB2_H

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