AABB.hpp

/*
 * Stellarium Scenery3d Plug-in
 *
 * Copyright (C) 2011-2015 Simon Parzer, Peter Neubauer, Georg Zotti, Andrei Borza, Florian Schaukowitsch
 *
 * 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., 51 Franklin Street, Suite 500, Boston, MA  02110-1335, USA.
 */

#ifndef _AABB_HPP_
#define _AABB_HPP_

#include <vector>
#include "VecMath.hpp"

class Box
{
public:
    Box();

    Vec3f vertices[8];

    void transform(const QMatrix4x4 &tf);
    void render() const;
};

class AABB
{
public:
    enum Corner
    {
        MinMinMin = 0, MaxMinMin, MaxMaxMin, MinMaxMin,
        MinMinMax, MaxMinMax, MaxMaxMax, MinMaxMax,
        CORNERCOUNT
    };

    enum Plane
    {
        Front = 0, Back, Bottom, Top, Left, Right,
        PLANECOUNT
    };

    Vec3f min, max;

    AABB();
    AABB(Vec3f min, Vec3f max);
    ~AABB();

    void reset();
    void resetToZero();

    void expand(const Vec3f& vec);

    Vec3f getCorner(Corner corner) const;

    Vec3f positiveVertex(Vec3f& normal) const;
    Vec3f negativeVertex(Vec3f& normal) const;

    void render() const;

    Vec4f getEquation(AABB::Plane p) const;
    Box toBox();
};

#endif