Polyhedron.hpp

/*
 * Stellarium Scenery3d Plug-in
 *
 * Copyright (C) 2011 Simon Parzer, Peter Neubauer, Georg Zotti, Andrei Borza
 *
 * 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 _POLYHEDRON_HPP_
#define _POLYHEDRON_HPP_

#include "Frustum.hpp"
#include "Plane.hpp"
#include "SPolygon.hpp"

class Polyhedron
{
public:
    Polyhedron();
    ~Polyhedron();

    QVector<SPolygon> polygons;

    void add(const Frustum& f);
    void add(const SPolygon& p);
    void add(const QVector<Vec3f> &verts, const Vec3f &normal);

    void intersect(const AABB &bb);
    void intersect(const Plane &p);
    void extrude(const Vec3f &dir, const AABB &bb);
    void clear();
    int getVertCount() const;
    const QVector<Vec3f> &getVerts() const;
    void makeUniqueVerts();

    void render() const;

    Box debugBox;
private:
    QVector<Vec3f> uniqueVerts;
    void addUniqueVert(const Vec3f &v);
    void intersect(const Line &l, const Vec3f &min, const Vec3f &max, QVector<Vec3f> &vertices);
    bool clip(float p, float q, float &u1, float &u2) const;
};

#endif