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15347 fschmid 1
/*
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 * coord.h
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 *
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 * Copyright 2006 Nathan Hurst <njh@mail.csse.monash.edu.au>
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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 SEEN_Geom_COORD_H
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#define SEEN_Geom_COORD_H
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#include <cmath>
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namespace Geom {
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/**
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 * A "real" type with sufficient precision for coordinates.
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 *
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 * You may safely assume that double (or even float) provides enough precision for storing
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 * on-canvas points, and hence that double provides enough precision for dot products of
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 * differences of on-canvas points.
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 */
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typedef double Coord;
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const Coord EPSILON = 1e-5; //1e-18;
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//IMPL: NearConcept
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inline bool are_near(Coord a, Coord b, double eps=EPSILON) { return fabs(a-b) <= eps; }
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} /* namespace Geom */
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#endif /* !SEEN_Geom_COORD_H */
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/*
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  Local Variables:
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  mode:c++
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  c-file-style:"stroustrup"
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  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
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  indent-tabs-mode:nil
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  fill-column:99
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  End:
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*/
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// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :