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/* |
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* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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* |
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* The University of Notre Dame grants you ("Licensee") a |
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* non-exclusive, royalty free, license to use, modify and |
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* redistribute this software in source and binary code form, provided |
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* that the following conditions are met: |
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* |
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* 1. Acknowledgement of the program authors must be made in any |
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* publication of scientific results based in part on use of the |
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* program. An acceptable form of acknowledgement is citation of |
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* the article in which the program was described (Matthew |
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* A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher |
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* J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented |
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* Parallel Simulation Engine for Molecular Dynamics," |
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* J. Comput. Chem. 26, pp. 252-271 (2005)) |
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* |
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* 2. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 3. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the |
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* distribution. |
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* |
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* This software is provided "AS IS," without a warranty of any |
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* kind. All express or implied conditions, representations and |
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* warranties, including any implied warranty of merchantability, |
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* fitness for a particular purpose or non-infringement, are hereby |
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* excluded. The University of Notre Dame and its licensors shall not |
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* be liable for any damages suffered by licensee as a result of |
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* using, modifying or distributing the software or its |
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* derivatives. In no event will the University of Notre Dame or its |
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* licensors be liable for any lost revenue, profit or data, or for |
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* direct, indirect, special, consequential, incidental or punitive |
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* damages, however caused and regardless of the theory of liability, |
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* arising out of the use of or inability to use software, even if the |
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* University of Notre Dame has been advised of the possibility of |
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* such damages. |
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*/ |
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#include <iostream> |
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#include <math.h> |
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#include <sprng.h> |
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#ifdef IS_MPI |
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#include "brains/mpiSimulation.hpp" |
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#include <mpi.h> |
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#endif |
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using namespace std; |
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|
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/* randomStreamSPRNF creates a new SPRNG stream for random numbers |
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*/ |
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int randomSPRNG::nStreamsInitialized = 0; |
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randomSPRNG::randomSPRNG(int iseed){ |
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int newSeed; |
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nStreamsInitialized++; |
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newSeed = abs(iseed) + nStreamsInitialized; |
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if( newSeed < 0 ) newSeed = abs( newSeed ); |
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randomSPRNG::randomSPRNG( int iseed ) { |
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int newSeed; |
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nStreamsInitialized++; |
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newSeed = abs(iseed) + nStreamsInitialized; |
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if (newSeed < 0) |
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newSeed = abs(newSeed); |
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|
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#ifdef IS_MPI |
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nSPRNGStreams = mpiSim->getNProcessors(); |
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|
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myStreamNumber = mpiSim->getMyNode(); |
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//random number generator should not depend on MpiSimulation |
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MPI_Comm_size(MPI_COMM_WORLD, &nSPRNGStreams); |
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myStreamNumber = worldRank; |
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#else |
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nSPRNGStreams = 1; |
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myStreamNumber = 0; |
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nSPRNGStreams = 1; |
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myStreamNumber = 0; |
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#endif |
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thisStream = init_sprng(GTYPE,myStreamNumber,nSPRNGStreams, |
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newSeed,SPRNG_DEFAULT); |
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thisStream = init_sprng(GTYPE, myStreamNumber, nSPRNGStreams, newSeed, |
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SPRNG_DEFAULT); |
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} |
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randomSPRNG::~randomSPRNG(){ |
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if ( thisStream != NULL){ |
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free_sprng(thisStream); |
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nStreamsInitialized--; |
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} |
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randomSPRNG::~randomSPRNG() { |
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if (thisStream != NULL) { |
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free_sprng(thisStream); |
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nStreamsInitialized--; |
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} |
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} |
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double randomSPRNG::getRandom() { return sprng(thisStream); } |
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double randomSPRNG::getRandom(){ |
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return sprng(thisStream); |
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} |
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// Gaussian SPRNG class... |
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double gaussianSPRNG::getGaussian(){ |
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double ranNum1; |
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double ranNum2; |
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double gaussianNumber; |
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double gaussianSPRNG::getGaussian() { |
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double ranNum1; |
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double ranNum2; |
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double gaussianNumber; |
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ranNum1 = getRandom(); |
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ranNum2 = getRandom(); |
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ranNum1 = getRandom(); |
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ranNum2 = getRandom(); |
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gaussianNumber = sqrt(-2.0 * log(ranNum1)) * cos(2 * M_PI * ranNum2); |
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gaussianNumber = sqrt(-2.0 * log(ranNum1)) * cos(2 * M_PI * ranNum2); |
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return gaussianNumber; |
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return gaussianNumber; |
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} |
