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/*
* pairs.h -- ePiX pair:: class and mathematical operators
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.1.10
* Last Change: August 04, 2007
*/
/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
* Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*/
/*
* ePiX 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.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef EPIX_PAIRS
#define EPIX_PAIRS
namespace ePiX {
class P;
class pair {
public:
pair(double arg1=0, double arg2=0)
: m_x1(arg1), m_x2(arg2) { }
pair(const P& arg); // take first two coordinates
double x1() const { return m_x1; }
double x2() const { return m_x2; }
// unary increment operators
pair& operator += (const pair& arg);
pair& operator -= (const pair& arg);
pair& operator *= (double c);
// complex multiplication and division
pair& operator *= (const pair& arg);
pair& operator /= (const pair& arg);
bool operator== (const pair& u) const;
bool operator!= (const pair& u) const;
private:
double m_x1;
double m_x2;
}; // end of class pair
pair operator- (pair u);
pair operator+ (pair u, const pair& v);
pair operator- (pair u, const pair& v);
pair operator* (double c, pair u);
// complex arithmetic
pair J(pair p);
pair operator* (pair u, const pair& v);
pair operator/ (pair u, const pair& v);
// dot product
double operator| (const pair& u, const pair& v);
double norm (const pair& u);
// componentwise product (a,b)&(x,y)=(ax,by)
pair operator& (const pair& u, const pair& v);
} // end of namespace
#endif /* EPIX_PAIRS */
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