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/**
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 *  \file geom.h
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 *  \brief Various geometrical calculations
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 *
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 *  Authors:
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 *   Nathan Hurst <njh@mail.csse.monash.edu.au>
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 *
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 * Copyright (C) 1999-2002 authors
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it either under the terms of the GNU Lesser General Public
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 * License version 2.1 as published by the Free Software Foundation
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 * (the "LGPL") or, at your option, under the terms of the Mozilla
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 * Public License Version 1.1 (the "MPL"). If you do not alter this
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 * notice, a recipient may use your version of this file under either
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 * the MPL or the LGPL.
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 *
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 * You should have received a copy of the LGPL along with this library
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 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 * You should have received a copy of the MPL along with this library
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 * in the file COPYING-MPL-1.1
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 *
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 * The contents of this file are subject to the Mozilla Public License
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 * Version 1.1 (the "License"); you may not use this file except in
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 * compliance with the License. You may obtain a copy of the License at
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 * http://www.mozilla.org/MPL/
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 *
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
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 * the specific language governing rights and limitations.
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 *
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 */
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#ifndef LIB2GEOM_SEEN_GEOM_H
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#define LIB2GEOM_SEEN_GEOM_H
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//TODO: move somewhere else
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#include <vector>
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#include "point.h"
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namespace Geom {
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enum IntersectorKind {
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    intersects = 0,
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    parallel,
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    coincident,
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    no_intersection
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};
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int
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intersector_ccw(const Geom::Point& p0, const Geom::Point& p1,
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                const Geom::Point& p2);
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/* intersectors */
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IntersectorKind
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line_intersection(Geom::Point const &n0, double const d0,
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                  Geom::Point const &n1, double const d1,
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                  Geom::Point &result);
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IntersectorKind
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segment_intersect(Geom::Point const &p00, Geom::Point const &p01,
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                  Geom::Point const &p10, Geom::Point const &p11,
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                  Geom::Point &result);
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IntersectorKind
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line_twopoint_intersect(Geom::Point const &p00, Geom::Point const &p01,
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                        Geom::Point const &p10, Geom::Point const &p11,
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                        Geom::Point &result);
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int centroid(std::vector<Geom::Point> p, Geom::Point& centroid, double &area);
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}
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#endif