randgen.h

00001 // randgen.h (random number functions)
00002 //
00003 //  The WorldForge Project
00004 //  Copyright (C) 2002  The WorldForge Project
00005 //
00006 //  This program is free software; you can redistribute it and/or modify
00007 //  it under the terms of the GNU General Public License as published by
00008 //  the Free Software Foundation; either version 2 of the License, or
00009 //  (at your option) any later version.
00010 //
00011 //  This program is distributed in the hope that it will be useful,
00012 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 //  GNU General Public License for more details.
00015 //
00016 //  You should have received a copy of the GNU General Public License
00017 //  along with this program; if not, write to the Free Software
00018 //  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00019 //
00020 //  For information about WorldForge and its authors, please contact
00021 //  the Worldforge Web Site at http://www.worldforge.org.
00022 
00023 // Author: Ron Steinke
00024 // Created: 2002-5-23
00025 
00026 #ifndef WFMATH_RANDGEN_H
00027 #define WFMATH_RANDGEN_H
00028 
00029 #include <wfmath/const.h>
00030 #include <wfmath/MersenneTwister.h>
00031 
00032 namespace WFMath {
00033 
00034 // backwards compatibility functions
00035 
00036 #ifdef WFMATH_USE_OLD_RAND
00037 
00039 
00042 inline void SeedRand(unsigned int val) {MTRand::instance.seed(val);}
00044 inline double DRand() {return MTRand::instance.rand();}
00046 inline unsigned int IRand(unsigned int val) {assert(val); return MTRand::instance.randInt(val - 1);}
00047 
00048 #endif
00049 
00050 } // namespace WFMath
00051 
00052 #endif  // WFMATH_RANDGEN_H

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