applications/staticProps/RhoR.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, 24107 (2008).          
 * [4]  Vardeman & Gezelter, in progress (2009).                        
 */

/* Calculates Rho(R) for nanoparticle with radius R*/
#include <algorithm>
#include <fstream>
#include "applications/staticProps/RhoR.hpp"
#include "utils/simError.h"
#include "utils/NumericConstant.hpp"
#include "io/DumpReader.hpp"
#include "primitives/Molecule.hpp"
#include <math.h>

namespace OpenMD {

     
  RhoR::RhoR(SimInfo* info, const std::string& filename, const std::string& sele, RealType len, int nrbins, RealType particleR)
    : StaticAnalyser(info, filename), selectionScript_(sele),  evaluator_(info), seleMan_(info), len_(len), nRBins_(nrbins){
    
    
    evaluator_.loadScriptString(sele);
    if (!evaluator_.isDynamic()) {
      seleMan_.setSelectionSet(evaluator_.evaluate());
    }
    
    
    deltaR_ = len_ /nRBins_;
    
    histogram_.resize(nRBins_);
    avgRhoR_.resize(nRBins_);
    particleR_ = particleR;
    setOutputName(getPrefix(filename) + ".RhoR");
  }
  

  void RhoR::process() {
    

    DumpReader reader(info_, dumpFilename_);    
    int nFrames = reader.getNFrames();
    nProcessed_ = nFrames/step_;
    
    std::fill(avgRhoR_.begin(), avgRhoR_.end(), 0.0);     
    std::fill(histogram_.begin(), histogram_.end(), 0);
    
    for (int istep = 0; istep < nFrames; istep += step_) {
      
      int i;    
      StuntDouble* sd;
      reader.readFrame(istep);
      currentSnapshot_ = info_->getSnapshotManager()->getCurrentSnapshot();
      Vector3d CenterOfMass = info_->getCom();      
      
      
      if (evaluator_.isDynamic()) {
        seleMan_.setSelectionSet(evaluator_.evaluate());
      }
      
      //determine which atom belongs to which slice
      for (sd = seleMan_.beginSelected(i); sd != NULL; sd = seleMan_.nextSelected(i)) {
        Vector3d pos = sd->getPos();
        Vector3d r12 = CenterOfMass - pos;

        RealType distance = r12.length();
        
        if (distance < len_) {
          int whichBin = distance / deltaR_;
          histogram_[whichBin] += 1;
        }
        
      }

    }

    processHistogram(); 
    writeRhoR();
  }


  void RhoR::processHistogram() {

    RealType particleDensity =  3.0 * info_->getNGlobalMolecules() / (4.0 * NumericConstant::PI * pow(particleR_,3));
    RealType pairConstant = ( 4.0 * NumericConstant::PI * particleDensity ) / 3.0;

    for(int i = 0 ; i < histogram_.size(); ++i){

      RealType rLower = i * deltaR_;
      RealType rUpper = rLower + deltaR_;
      RealType volSlice = ( rUpper * rUpper * rUpper ) - ( rLower * rLower * rLower );
      RealType nIdeal = volSlice * pairConstant;

      avgRhoR_[i] += histogram_[i] / nIdeal;    
    }

  }

 
  void RhoR::writeRhoR() {
    std::ofstream rdfStream(outputFilename_.c_str());
    if (rdfStream.is_open()) {
      rdfStream << "#radial density function rho(r)\n";
      rdfStream << "#r\tcorrValue\n";
      for (int i = 0; i < avgRhoR_.size(); ++i) {
        RealType r = deltaR_ * (i + 0.5);
        rdfStream << r << "\t" << avgRhoR_[i]/nProcessed_ << "\n";
      }
        
    } else {

      sprintf(painCave.errMsg, "RhoR: unable to open %s\n", outputFilename_.c_str());
      painCave.isFatal = 1;
      simError();  
    }

    rdfStream.close();
  }

}

Revision:	1465
Committed:	Fri Jul 9 23:08:25 2010 UTC (14 years, 9 months ago) by chuckv
File size:	5223 byte(s)
Log Message:	Creating busticated version of OpenMD
#	User	Rev	Content
1	chuckv	1091	/*
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	gezelter	1390	* 1. Redistributions of source code must retain the above copyright
10	chuckv	1091	* notice, this list of conditions and the following disclaimer.
11			*
12	gezelter	1390	* 2. Redistributions in binary form must reproduce the above copyright
13	chuckv	1091	* 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			* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39			* [4] Vardeman & Gezelter, in progress (2009).
40	chuckv	1091	*/
41
42			/* Calculates Rho(R) for nanoparticle with radius R*/
43			#include <algorithm>
44			#include <fstream>
45			#include "applications/staticProps/RhoR.hpp"
46			#include "utils/simError.h"
47			#include "utils/NumericConstant.hpp"
48			#include "io/DumpReader.hpp"
49			#include "primitives/Molecule.hpp"
50	chuckv	1306	#include <math.h>
51	chuckv	1091
52	gezelter	1390	namespace OpenMD {
53	chuckv	1091
54
55			RhoR::RhoR(SimInfo* info, const std::string& filename, const std::string& sele, RealType len, int nrbins, RealType particleR)
56			: StaticAnalyser(info, filename), selectionScript_(sele), evaluator_(info), seleMan_(info), len_(len), nRBins_(nrbins){
57
58
59			evaluator_.loadScriptString(sele);
60			if (!evaluator_.isDynamic()) {
61			seleMan_.setSelectionSet(evaluator_.evaluate());
62			}
63
64
65			deltaR_ = len_ /nRBins_;
66
67			histogram_.resize(nRBins_);
68			avgRhoR_.resize(nRBins_);
69			particleR_ = particleR;
70			setOutputName(getPrefix(filename) + ".RhoR");
71			}
72
73
74			void RhoR::process() {
75
76
77
78			DumpReader reader(info_, dumpFilename_);
79			int nFrames = reader.getNFrames();
80			nProcessed_ = nFrames/step_;
81
82			std::fill(avgRhoR_.begin(), avgRhoR_.end(), 0.0);
83			std::fill(histogram_.begin(), histogram_.end(), 0);
84
85			for (int istep = 0; istep < nFrames; istep += step_) {
86
87			int i;
88			StuntDouble* sd;
89			reader.readFrame(istep);
90			currentSnapshot_ = info_->getSnapshotManager()->getCurrentSnapshot();
91			Vector3d CenterOfMass = info_->getCom();
92
93
94
95
96			if (evaluator_.isDynamic()) {
97			seleMan_.setSelectionSet(evaluator_.evaluate());
98			}
99
100			//determine which atom belongs to which slice
101			for (sd = seleMan_.beginSelected(i); sd != NULL; sd = seleMan_.nextSelected(i)) {
102			Vector3d pos = sd->getPos();
103			Vector3d r12 = CenterOfMass - pos;
104
105			RealType distance = r12.length();
106
107			if (distance < len_) {
108			int whichBin = distance / deltaR_;
109	chuckv	1092	histogram_[whichBin] += 1;
110	chuckv	1091	}
111
112			}
113
114			}
115
116			processHistogram();
117			writeRhoR();
118			}
119
120
121
122			void RhoR::processHistogram() {
123
124			RealType particleDensity = 3.0 * info_->getNGlobalMolecules() / (4.0 * NumericConstant::PI * pow(particleR_,3));
125			RealType pairConstant = ( 4.0 * NumericConstant::PI * particleDensity ) / 3.0;
126
127			for(int i = 0 ; i < histogram_.size(); ++i){
128
129			RealType rLower = i * deltaR_;
130			RealType rUpper = rLower + deltaR_;
131			RealType volSlice = ( rUpper * rUpper * rUpper ) - ( rLower * rLower * rLower );
132			RealType nIdeal = volSlice * pairConstant;
133
134			avgRhoR_[i] += histogram_[i] / nIdeal;
135			}
136
137			}
138
139
140
141			void RhoR::writeRhoR() {
142			std::ofstream rdfStream(outputFilename_.c_str());
143			if (rdfStream.is_open()) {
144			rdfStream << "#radial density function rho(r)\n";
145			rdfStream << "#r\tcorrValue\n";
146			for (int i = 0; i < avgRhoR_.size(); ++i) {
147			RealType r = deltaR_ * (i + 0.5);
148			rdfStream << r << "\t" << avgRhoR_[i]/nProcessed_ << "\n";
149			}
150
151			} else {
152
153			sprintf(painCave.errMsg, "RhoR: unable to open %s\n", outputFilename_.c_str());
154			painCave.isFatal = 1;
155			simError();
156			}
157
158			rdfStream.close();
159			}
160
161			}
162