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randomserver.h

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00001 /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*-
00002 
00003    this file is part of rcssserver3D
00004    Fri May 9 2003
00005    Copyright (C) 2002,2003 Koblenz University
00006    Copyright (C) 2004 RoboCup Soccer Server 3D Maintenance Group
00007    $Id: randomserver.h,v 1.2 2004/02/12 14:07:24 fruit Exp $
00008 
00009    This program is free software; you can redistribute it and/or modify
00010    it under the terms of the GNU General Public License as published by
00011    the Free Software Foundation; version 2 of the License.
00012 
00013    This program is distributed in the hope that it will be useful,
00014    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016    GNU General Public License for more details.
00017 
00018    You should have received a copy of the GNU General Public License
00019    along with this program; if not, write to the Free Software
00020    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00021 
00022 */
00023 #ifndef ZEITGEIST_RANDOMSERVER_H
00024 #define ZEITGEIST_RANDOMSERVER_H
00025 
00026 #include <salt/random.h>
00027 #include <zeitgeist/node.h>
00028 #include <sys/time.h>
00029 
00030 namespace zeitgeist
00031 {
00032 
00037 class RandomServer : public Node
00038 {
00039 public:
00041     RandomServer() {}
00042 
00043     virtual ~RandomServer()  {}
00044 
00046     void Seed(salt::RandomEngine::result_type seed)
00047     {
00048         if (seed == 0)
00049         {
00050             timeval tv;
00051             gettimeofday(&tv,0);
00052             seed = tv.tv_usec;
00053         }
00054         salt::RandomEngine::instance(seed);
00055     }
00056 
00058     template<class RealType>
00059     RealType GetUniformRandom(RealType min, RealType max) const
00060     {
00061         return salt::UniformRNG<RealType>(min,max)();
00062     }
00063 
00064     template<class RealType>
00065     RealType GetNormalRandom(RealType mean, RealType sigma) const
00066     {
00067         return salt::NormalRNG<RealType>(mean,sigma)();
00068     }
00069 
00070     template<class RealType>
00071     RealType GetExponentialRandom(RealType lambda) const
00072     {
00073         return salt::ExponentialRNG<RealType>(lambda)();
00074     }
00075 
00076 };
00077 
00078 DECLARE_CLASS(RandomServer);
00079 
00080 } //namespace zeitgeist
00081 
00082 #endif //ZEITGEIST_LOGSERVER_H

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