applications/staticProps/GofRZ.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).                        
 */

#include <algorithm>
#include <fstream>
#include "applications/staticProps/GofRZ.hpp"
#include "utils/simError.h"

namespace OpenMD {

  GofRZ::GofRZ(SimInfo* info, const std::string& filename, const std::string& sele1, 
                       const std::string& sele2, RealType len, int nrbins, int nZBins)
    : RadialDistrFunc(info, filename, sele1, sele2), len_(len), nRBins_(nrbins), nZBins_(nZBins){

      deltaR_ = len_ / (double) nRBins_;
      deltaZ_ = len_ / (double)nZBins_;    
      histogram_.resize(nRBins_);
      avgGofr_.resize(nRBins_);
      for (int i = 0 ; i < nRBins_; ++i) {
        histogram_[i].resize(nZBins_);
        avgGofr_[i].resize(nZBins_);
      }
    }


  void GofRZ::preProcess() {
    for (int i = 0; i < avgGofr_.size(); ++i) {
      std::fill(avgGofr_[i].begin(), avgGofr_[i].end(), 0);
    }
  }

  void GofRZ::initalizeHistogram() {
    npairs_ = 0;
    for (int i = 0; i < histogram_.size(); ++i){
      std::fill(histogram_[i].begin(), histogram_[i].end(), 0);
    }
  }
  
  void GofRZ::processHistogram() {
    int nPairs = getNPairs();
    RealType volume = info_->getSnapshotManager()->getCurrentSnapshot()->getVolume();
    RealType pairDensity = nPairs / volume;

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

      RealType rLower = i * deltaR_;
      RealType rUpper = rLower + deltaR_;
      RealType volSlice = NumericConstant::PI * deltaZ_ * (( rUpper * rUpper ) - ( rLower * rLower ));
      RealType nIdeal = volSlice * pairDensity;

      for (int j = 0; j < histogram_[i].size(); ++j){
        avgGofr_[i][j] += histogram_[i][j] / nIdeal;    
      }
    }

  }

  void GofRZ::collectHistogram(StuntDouble* sd1, StuntDouble* sd2) {

    if (sd1 == sd2) {
      return;
    }
    Vector3d pos1 = sd1->getPos();
    Vector3d pos2 = sd2->getPos();
    Vector3d r12 = pos2 - pos1;
    if (usePeriodicBoundaryConditions_)
      currentSnapshot_->wrapVector(r12);

    RealType distance = sqrt(pow(r12.x(), 2) + pow(r12.y(), 2));

    int whichRBin = distance / deltaR_;

    if (distance <= len_) {
     
      RealType Z = abs(r12.z());

      if (Z <= len_) {
        int whichZBin = Z / deltaZ_;
        ++histogram_[whichRBin][whichZBin];        
        ++npairs_;
      }
    }
  }

  void GofRZ::writeRdf() {
    std::ofstream rdfStream(outputFilename_.c_str());
    if (rdfStream.is_open()) {
      rdfStream << "#radial distribution function\n";
      rdfStream << "#selection1: (" << selectionScript1_ << ")\t";
      rdfStream << "selection2: (" << selectionScript2_ << ")\n";
      rdfStream << "#nRBins = " << nRBins_ << "\t maxLen = " << len_ << "deltaR = " << deltaR_ <<"\n";
      rdfStream << "#nZBins =" << nZBins_ << "deltaZ = " << deltaZ_ << "\n";
      for (int i = 0; i < avgGofr_.size(); ++i) {
        RealType r = deltaR_ * (i + 0.5);

        for(int j = 0; j < avgGofr_[i].size(); ++j) {
          RealType z = deltaZ_ * (j + 0.5);
          rdfStream << avgGofr_[i][j]/nProcessed_ << "\t";
        }

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

    rdfStream.close();
  }

}


Revision:	1440
Committed:	Thu Apr 29 14:41:48 2010 UTC (15 years ago) by gezelter
File size:	5281 byte(s)
Log Message:	Adding a new correlation function to do slab-segregated g(r) calculations. This computes at g(r) for pairs while requiring the z coordinates of the two sites to be at fixed separations. The data is output in: r, z, g(r,z)
#	Content
1	/*
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. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	*
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* 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	*
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	*/
41
42	#include <algorithm>
43	#include <fstream>
44	#include "applications/staticProps/GofRZ.hpp"
45	#include "utils/simError.h"
46
47	namespace OpenMD {
48
49	GofRZ::GofRZ(SimInfo* info, const std::string& filename, const std::string& sele1,
50	const std::string& sele2, RealType len, int nrbins, int nZBins)
51	: RadialDistrFunc(info, filename, sele1, sele2), len_(len), nRBins_(nrbins), nZBins_(nZBins){
52
53	deltaR_ = len_ / (double) nRBins_;
54	deltaZ_ = len_ / (double)nZBins_;
55	histogram_.resize(nRBins_);
56	avgGofr_.resize(nRBins_);
57	for (int i = 0 ; i < nRBins_; ++i) {
58	histogram_[i].resize(nZBins_);
59	avgGofr_[i].resize(nZBins_);
60	}
61	}
62
63
64	void GofRZ::preProcess() {
65	for (int i = 0; i < avgGofr_.size(); ++i) {
66	std::fill(avgGofr_[i].begin(), avgGofr_[i].end(), 0);
67	}
68	}
69
70	void GofRZ::initalizeHistogram() {
71	npairs_ = 0;
72	for (int i = 0; i < histogram_.size(); ++i){
73	std::fill(histogram_[i].begin(), histogram_[i].end(), 0);
74	}
75	}
76
77	void GofRZ::processHistogram() {
78	int nPairs = getNPairs();
79	RealType volume = info_->getSnapshotManager()->getCurrentSnapshot()->getVolume();
80	RealType pairDensity = nPairs / volume;
81
82	for(int i = 0 ; i < histogram_.size(); ++i){
83
84	RealType rLower = i * deltaR_;
85	RealType rUpper = rLower + deltaR_;
86	RealType volSlice = NumericConstant::PI * deltaZ_ * (( rUpper * rUpper ) - ( rLower * rLower ));
87	RealType nIdeal = volSlice * pairDensity;
88
89	for (int j = 0; j < histogram_[i].size(); ++j){
90	avgGofr_[i][j] += histogram_[i][j] / nIdeal;
91	}
92	}
93
94	}
95
96	void GofRZ::collectHistogram(StuntDouble* sd1, StuntDouble* sd2) {
97
98	if (sd1 == sd2) {
99	return;
100	}
101	Vector3d pos1 = sd1->getPos();
102	Vector3d pos2 = sd2->getPos();
103	Vector3d r12 = pos2 - pos1;
104	if (usePeriodicBoundaryConditions_)
105	currentSnapshot_->wrapVector(r12);
106
107	RealType distance = sqrt(pow(r12.x(), 2) + pow(r12.y(), 2));
108
109	int whichRBin = distance / deltaR_;
110
111	if (distance <= len_) {
112
113	RealType Z = abs(r12.z());
114
115	if (Z <= len_) {
116	int whichZBin = Z / deltaZ_;
117	++histogram_[whichRBin][whichZBin];
118	++npairs_;
119	}
120	}
121	}
122
123	void GofRZ::writeRdf() {
124	std::ofstream rdfStream(outputFilename_.c_str());
125	if (rdfStream.is_open()) {
126	rdfStream << "#radial distribution function\n";
127	rdfStream << "#selection1: (" << selectionScript1_ << ")\t";
128	rdfStream << "selection2: (" << selectionScript2_ << ")\n";
129	rdfStream << "#nRBins = " << nRBins_ << "\t maxLen = " << len_ << "deltaR = " << deltaR_ <<"\n";
130	rdfStream << "#nZBins =" << nZBins_ << "deltaZ = " << deltaZ_ << "\n";
131	for (int i = 0; i < avgGofr_.size(); ++i) {
132	RealType r = deltaR_ * (i + 0.5);
133
134	for(int j = 0; j < avgGofr_[i].size(); ++j) {
135	RealType z = deltaZ_ * (j + 0.5);
136	rdfStream << avgGofr_[i][j]/nProcessed_ << "\t";
137	}
138
139	rdfStream << "\n";
140	}
141
142	} else {
143	sprintf(painCave.errMsg, "GofRZ: unable to open %s\n", outputFilename_.c_str());
144	painCave.isFatal = 1;
145	simError();
146	}
147
148	rdfStream.close();
149	}
150
151	}
152
153