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////////////////////////////////////////////////////////////////////////////////
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// This file is part of Toolkit for Conceptual Modeling (TCM).
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// (c) copyright 1995, Vrije Universiteit Amsterdam.
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// Author: Frank Dehne (frank@cs.vu.nl).
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// TCM is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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// TCM is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with TCM; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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////////////////////////////////////////////////////////////////////////////////
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const Point Point::ZERO = Point(0,0);
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Point operator-(const Point p1, const Point p2)
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{return Point(p1.x - p2.x, p1.y - p2.y);}
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Point operator+(const Point p1, const Point p2)
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{return Point(p1.x + p2.x, p1.y + p2.y);}
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Point operator*(const Point p1, const Point p2)
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{return Point(p1.x * p2.x, p1.y * p2.y);}
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Point operator/(const Point p1, const Point p2)
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{return Point(p1.x / p2.x, p1.y / p2.y);}
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bool operator==(const Point &p1, const Point &p2) {
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return (p1.x == p2.x && p1.y == p2.y); }
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bool operator!=(const Point &p1, const Point &p2) {
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return (p1.x != p2.x || p1.y != p2.y); }
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std::ostream &operator<<(std::ostream &o, const Point p)
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{o << p.x << " "; o << p.y; return o;}
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std::istream &operator>>(std::istream &i, Point &p)
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{i >> p.x; i >> p.y; return i;}