4 * This source code is part of
8 * GROningen MAchine for Chemical Simulations
12 * Copyright (c) 1991-2001
13 * BIOSON Research Institute, Dept. of Biophysical Chemistry
14 * University of Groningen, The Netherlands
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License
18 * as published by the Free Software Foundation; either version 2
19 * of the License, or (at your option) any later version.
21 * If you want to redistribute modifications, please consider that
22 * scientific software is very special. Version control is crucial -
23 * bugs must be traceable. We will be happy to consider code for
24 * inclusion in the official distribution, but derived work must not
25 * be called official GROMACS. Details are found in the README & COPYING
26 * files - if they are missing, get the official version at www.gromacs.org.
28 * To help us fund GROMACS development, we humbly ask that you cite
29 * the papers on the package - you can find them in the top README file.
31 * Do check out http://www.gromacs.org , or mail us at gromacs@gromacs.org .
34 * Giving Russians Opium May Alter Current Situation
40 static char *SRCID_complex_h = "$Id$";
52 typedef t_complex cvec[DIM];
54 static t_complex cnul = { 0.0, 0.0 };
56 static t_complex rcmul(real r,t_complex c)
66 static t_complex rcexp(real r)
77 static t_complex cadd(t_complex a,t_complex b)
87 static t_complex csub(t_complex a,t_complex b)
97 static t_complex cmul(t_complex a,t_complex b)
101 c.re = a.re*b.re - a.im*b.im;
102 c.im = a.re*b.im + a.im*b.re;
107 static t_complex conjugate(t_complex c)
117 static t_complex cdiv(t_complex teller,t_complex noemer)
119 t_complex res,anoemer;
121 anoemer = cmul(conjugate(noemer),noemer);
122 res = cmul(teller,conjugate(noemer));
124 return rcmul(1.0/anoemer.re,res);