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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /graphics/epix/pairs.h
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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 */