EMAN2
emconstants.h
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00001 /*
00002  * Author: Pawel A.Penczek, 09/09/2006 (Pawel.A.Penczek@uth.tmc.edu)
00003  * Copyright (c) 2000-2006 The University of Texas - Houston Medical School
00004  *
00005  * This software is issued under a joint BSD/GNU license. You may use the
00006  * source code in this file under either license. However, note that the
00007  * complete EMAN2 and SPARX software packages have some GPL dependencies,
00008  * so you are responsible for compliance with the licenses of these packages
00009  * if you opt to use BSD licensing. The warranty disclaimer below holds
00010  * in either instance.
00011  *
00012  * This complete copyright notice must be included in any revised version of the
00013  * source code. Additional authorship citations may be added, but existing
00014  * author citations must be preserved.
00015  *
00016  * This program is free software; you can redistribute it and/or modify
00017  * it under the terms of the GNU General Public License as published by
00018  * the Free Software Foundation; either version 2 of the License, or
00019  * (at your option) any later version.
00020  *
00021  * This program is distributed in the hope that it will be useful,
00022  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00023  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
00024  * GNU General Public License for more details.
00025  *
00026  * You should have received a copy of the GNU General Public License
00027  * along with this program; if not, write to the Free Software
00028  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
00029  *
00030  */
00031 
00032 #ifndef EMCONSTANTS_H
00033 #define EMCONSTANTS_H
00034 
00035 #include <cmath>
00036 #include <complex>
00037 const long double pi = 3.141592653589793238462643383279502884197L;
00038 const long double twopi = 2*pi;
00039 const long double pihalf = pi/2;
00040 const long double dgr_to_rad = pi/180;
00041 const long double rad_to_dgr = 180/pi;
00042 const double e_base = std::exp(1.);
00043 const double sqrt2 = std::sqrt(2.);
00044 const std::complex<float> iimag(0.f,1.f);
00045 
00046 #endif // EMCONSTANTS_H