48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
// -*- C++ -*-
|
|
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
|
|
Written by James Clark (jjc@jclark.com)
|
|
|
|
This file is part of groff.
|
|
|
|
groff 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, or (at your option) any later
|
|
version.
|
|
|
|
groff 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 groff; see the file COPYING. If not, write to the Free Software
|
|
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
struct place;
|
|
struct position {
|
|
double x;
|
|
double y;
|
|
position(double, double );
|
|
position();
|
|
position(const place &);
|
|
position &operator+=(const position &);
|
|
position &operator-=(const position &);
|
|
position &operator*=(double);
|
|
position &operator/=(double);
|
|
};
|
|
|
|
position operator-(const position &);
|
|
position operator+(const position &, const position &);
|
|
position operator-(const position &, const position &);
|
|
position operator/(const position &, double);
|
|
position operator*(const position &, double);
|
|
// dot product
|
|
double operator*(const position &, const position &);
|
|
int operator==(const position &, const position &);
|
|
int operator!=(const position &, const position &);
|
|
|
|
double hypot(const position &a);
|
|
|
|
typedef position distance;
|
|
|