src/math/SeqRandNumGen.cpp

 /*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Acknowledgement of the program authors must be made in any
 *    publication of scientific results based in part on use of the
 *    program.  An acceptable form of acknowledgement is citation of
 *    the article in which the program was described (Matthew
 *    A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher
 *    J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented
 *    Parallel Simulation Engine for Molecular Dynamics,"
 *    J. Comput. Chem. 26, pp. 252-271 (2005))
 *
 * 2. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 3. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 */

#include "math/SeqRandNumGen.hpp"


namespace oopse {


int SeqRandNumGen::nCreatedRNG_ = 0;

SeqRandNumGen::SeqRandNumGen( const uint32& oneSeed) {

    //In order to generate independent random number stream, the actual seed used by random 
    //number generator is the seed passed to the constructor plus the number of random number
    //generators which are already created. 
    int newSeed = oneSeed + nCreatedRNG_;
    mtRand_ = new MTRand(newSeed, 1, 0);
    ++nCreatedRNG_;
}

SeqRandNumGen::SeqRandNumGen() {

    //the default seeds generated by MTRand will make sure they are unique
    mtRand_ = new MTRand(1, 0);      
    ++nCreatedRNG_;
}


void SeqRandNumGen::seed( const uint32 oneSeed ) {

    int newSeed = oneSeed + nCreatedRNG_;
    mtRand_->seed(newSeed);

    ++nCreatedRNG_;
}
        
void SeqRandNumGen::seed() {

    mtRand_->seed();
    ++nCreatedRNG_;
}    


}

Revision:	2076
Committed:	Wed Mar 2 15:36:14 2005 UTC (19 years, 4 months ago) by tim
File size:	2972 byte(s)
Log Message:	remove default parameter from MersenneTwister.hpp which causes all kinds of trouble. Refactory random number generator
#	User	Rev	Content
1	tim	2076	/*
2			* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3			*
4			* The University of Notre Dame grants you ("Licensee") a
5			* non-exclusive, royalty free, license to use, modify and
6			* redistribute this software in source and binary code form, provided
7			* that the following conditions are met:
8			*
9			* 1. Acknowledgement of the program authors must be made in any
10			* publication of scientific results based in part on use of the
11			* program. An acceptable form of acknowledgement is citation of
12			* the article in which the program was described (Matthew
13			* A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher
14			* J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented
15			* Parallel Simulation Engine for Molecular Dynamics,"
16			* J. Comput. Chem. 26, pp. 252-271 (2005))
17			*
18			* 2. Redistributions of source code must retain the above copyright
19			* notice, this list of conditions and the following disclaimer.
20			*
21			* 3. Redistributions in binary form must reproduce the above copyright
22			* notice, this list of conditions and the following disclaimer in the
23			* documentation and/or other materials provided with the
24			* distribution.
25			*
26			* This software is provided "AS IS," without a warranty of any
27			* kind. All express or implied conditions, representations and
28			* warranties, including any implied warranty of merchantability,
29			* fitness for a particular purpose or non-infringement, are hereby
30			* excluded. The University of Notre Dame and its licensors shall not
31			* be liable for any damages suffered by licensee as a result of
32			* using, modifying or distributing the software or its
33			* derivatives. In no event will the University of Notre Dame or its
34			* licensors be liable for any lost revenue, profit or data, or for
35			* direct, indirect, special, consequential, incidental or punitive
36			* damages, however caused and regardless of the theory of liability,
37			* arising out of the use of or inability to use software, even if the
38			* University of Notre Dame has been advised of the possibility of
39			* such damages.
40			*/
41
42			#include "math/SeqRandNumGen.hpp"
43
44
45			namespace oopse {
46
47
48
49			int SeqRandNumGen::nCreatedRNG_ = 0;
50
51			SeqRandNumGen::SeqRandNumGen( const uint32& oneSeed) {
52
53			//In order to generate independent random number stream, the actual seed used by random
54			//number generator is the seed passed to the constructor plus the number of random number
55			//generators which are already created.
56			int newSeed = oneSeed + nCreatedRNG_;
57			mtRand_ = new MTRand(newSeed, 1, 0);
58			++nCreatedRNG_;
59			}
60
61			SeqRandNumGen::SeqRandNumGen() {
62
63			//the default seeds generated by MTRand will make sure they are unique
64			mtRand_ = new MTRand(1, 0);
65			++nCreatedRNG_;
66			}
67
68
69			void SeqRandNumGen::seed( const uint32 oneSeed ) {
70
71			int newSeed = oneSeed + nCreatedRNG_;
72			mtRand_->seed(newSeed);
73
74			++nCreatedRNG_;
75			}
76
77			void SeqRandNumGen::seed() {
78
79			mtRand_->seed();
80			++nCreatedRNG_;
81			}
82
83
84			}
85