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. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *                                                                      
 * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
 * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
 * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).          
 * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
 * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
 */

#include "math/SeqRandNumGen.hpp"


namespace OpenMD {


  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:	1879
Committed:	Sun Jun 16 15:15:42 2013 UTC (11 years, 10 months ago) by gezelter
File size:	3098 byte(s)
Log Message:	MERGE OpenMD development 1783:1878 into trunk
#	User	Rev	Content
1	gezelter	507	/*
2	tim	392	* 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	gezelter	1390	* 1. Redistributions of source code must retain the above copyright
10	tim	392	* notice, this list of conditions and the following disclaimer.
11			*
12	gezelter	1390	* 2. Redistributions in binary form must reproduce the above copyright
13	tim	392	* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the
15			* distribution.
16			*
17			* This software is provided "AS IS," without a warranty of any
18			* kind. All express or implied conditions, representations and
19			* warranties, including any implied warranty of merchantability,
20			* fitness for a particular purpose or non-infringement, are hereby
21			* excluded. The University of Notre Dame and its licensors shall not
22			* be liable for any damages suffered by licensee as a result of
23			* using, modifying or distributing the software or its
24			* derivatives. In no event will the University of Notre Dame or its
25			* licensors be liable for any lost revenue, profit or data, or for
26			* direct, indirect, special, consequential, incidental or punitive
27			* damages, however caused and regardless of the theory of liability,
28			* arising out of the use of or inability to use software, even if the
29			* University of Notre Dame has been advised of the possibility of
30			* such damages.
31	gezelter	1390	*
32			* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33			* research, please cite the appropriate papers when you publish your
34			* work. Good starting points are:
35			*
36			* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
37			* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
38	gezelter	1879	* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).
39	gezelter	1782	* [4] Kuang & Gezelter, J. Chem. Phys. 133, 164101 (2010).
40			* [5] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41	tim	392	*/
42
43			#include "math/SeqRandNumGen.hpp"
44
45
46	gezelter	1390	namespace OpenMD {
47	tim	392
48
49
50	gezelter	507	int SeqRandNumGen::nCreatedRNG_ = 0;
51	tim	392
52	gezelter	507	SeqRandNumGen::SeqRandNumGen( const uint32& oneSeed) {
53	tim	392
54			//In order to generate independent random number stream, the actual seed used by random
55			//number generator is the seed passed to the constructor plus the number of random number
56			//generators which are already created.
57			int newSeed = oneSeed + nCreatedRNG_;
58			mtRand_ = new MTRand(newSeed, 1, 0);
59			++nCreatedRNG_;
60	gezelter	507	}
61	tim	392
62	gezelter	507	SeqRandNumGen::SeqRandNumGen() {
63	tim	392
64			//the default seeds generated by MTRand will make sure they are unique
65			mtRand_ = new MTRand(1, 0);
66			++nCreatedRNG_;
67	gezelter	507	}
68	tim	392
69
70	gezelter	507	void SeqRandNumGen::seed( const uint32 oneSeed ) {
71	tim	392
72			int newSeed = oneSeed + nCreatedRNG_;
73			mtRand_->seed(newSeed);
74
75			++nCreatedRNG_;
76	gezelter	507	}
77	tim	392
78	gezelter	507	void SeqRandNumGen::seed() {
79	tim	392
80			mtRand_->seed();
81			++nCreatedRNG_;
82	gezelter	507	}
83	tim	392
84
85			}
86