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root/group/trunk/OOPSE-4/src/applications/staticProps/BondOrderParameter.cpp
Revision: 3021
Committed: Mon Sep 25 22:08:33 2006 UTC (17 years, 11 months ago) by gezelter
File size: 10926 byte(s)
Log Message:
fixing bond order parameter code

File Contents

# User Rev Content
1 chuckv 3005 /*
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    
43     /* Creates orientational bond order parameters as outlined by
44     * Bond-orientaional order in liquids and glasses, Steinhart,Nelson,Ronchetti
45     * Phys Rev B, 28,784,1983
46     *
47     */
48 gezelter 3007
49 chuckv 3005 #include "applications/staticProps/BondOrderParameter.hpp"
50     #include "utils/simError.h"
51     #include "io/DumpReader.hpp"
52     #include "primitives/Molecule.hpp"
53     #include "utils/NumericConstant.hpp"
54 gezelter 3009
55 chuckv 3005 namespace oopse {
56    
57 gezelter 3007 BondOrderParameter::BondOrderParameter(SimInfo* info,
58     const std::string& filename,
59     const std::string& sele,
60 gezelter 3021 double rCut, int lMax, int nbins) : StaticAnalyser(info, filename), selectionScript_(sele), evaluator_(info), seleMan_(info){
61 gezelter 3007
62 gezelter 3009 setOutputName(getPrefix(filename) + ".bo");
63 chuckv 3005
64 gezelter 3007 evaluator_.loadScriptString(sele);
65     if (!evaluator_.isDynamic()) {
66     seleMan_.setSelectionSet(evaluator_.evaluate());
67 chuckv 3005 }
68    
69 gezelter 3007 // Set up cutoff radius and order of the Legendre Polynomial:
70    
71 gezelter 3021 lMax_ = lMax;
72 chuckv 3005 rCut_ = rCut;
73 gezelter 3021 nBins_ = nbins;
74     Qcount_.resize(lMax_+1);
75     Wcount_.resize(lMax_+1);
76 gezelter 3017
77     // Q can take values from 0 to 1
78    
79     MinQ_ = 0.0;
80 gezelter 3021 MaxQ_ = 1.1;
81 gezelter 3017 deltaQ_ = (MaxQ_ - MinQ_) / nbins;
82    
83     // W_6 for icosahedral clusters is 11 / sqrt(4199) = 0.169754, so we'll
84     // use values for MinW_ and MaxW_ that are slightly larger than this:
85    
86     MinW_ = -0.18;
87     MaxW_ = 0.18;
88     deltaW_ = (MaxW_ - MinW_) / nbins;
89 gezelter 3007 }
90 chuckv 3005
91 gezelter 3009 BondOrderParameter::~BondOrderParameter() {
92 gezelter 3017 Q_histogram_.clear();
93     W_histogram_.clear();
94 gezelter 3009 }
95    
96 gezelter 3017 void BondOrderParameter::initalizeHistogram() {
97 gezelter 3021 for (int bin = 0; bin < nBins_; bin++) {
98     for (int l = 0; l <= lMax_; l++) {
99     Q_histogram_[std::make_pair(bin,l)] = 0;
100     W_histogram_[std::make_pair(bin,l)] = 0;
101     }
102     }
103 gezelter 3017 }
104    
105 gezelter 3007 void BondOrderParameter::process() {
106     Molecule* mol;
107     Atom* atom;
108     RigidBody* rb;
109 gezelter 3011 int myIndex;
110 gezelter 3007 SimInfo::MoleculeIterator mi;
111     Molecule::RigidBodyIterator rbIter;
112     Molecule::AtomIterator ai;
113     StuntDouble* sd;
114 gezelter 3011 Vector3d vec;
115 gezelter 3010 RealType costheta;
116 gezelter 3007 RealType phi;
117     RealType r;
118     RealType dist;
119 gezelter 3021 std::map<std::pair<int,int>,ComplexType> q;
120     std::vector<RealType> q_l;
121     std::map<std::pair<int,int>,ComplexType> QBar;
122     std::vector<RealType> Q2;
123     std::vector<RealType> Q;
124     std::vector<ComplexType> W;
125     std::vector<ComplexType> W_hat;
126 gezelter 3017 int nBonds, Nbonds;
127 gezelter 3010 SphericalHarmonic sphericalHarmonic;
128 gezelter 3007 int i, j;
129 gezelter 3011 // Make arrays for Wigner3jm
130 gezelter 3021 double* THRCOF = new double[2*lMax_+1];
131 gezelter 3011 // Variables for Wigner routine
132 gezelter 3021 double lPass, m1Pass, m2Min, m2Max;
133     int error, m1, m2, m3, mSize;
134     mSize = 2*lMax_+1;
135 gezelter 3011
136 gezelter 3007 DumpReader reader(info_, dumpFilename_);
137     int nFrames = reader.getNFrames();
138 gezelter 3009 frameCounter_ = 0;
139 chuckv 3005
140 gezelter 3021 q_l.resize(lMax_+1);
141     Q2.resize(lMax_+1);
142     Q.resize(lMax_+1);
143     W.resize(lMax_+1);
144     W_hat.resize(lMax_+1);
145    
146 gezelter 3007 for (int istep = 0; istep < nFrames; istep += step_) {
147     reader.readFrame(istep);
148 gezelter 3009 frameCounter_++;
149 gezelter 3007 currentSnapshot_ = info_->getSnapshotManager()->getCurrentSnapshot();
150    
151     if (evaluator_.isDynamic()) {
152     seleMan_.setSelectionSet(evaluator_.evaluate());
153     }
154 chuckv 3005
155 gezelter 3007 // update the positions of atoms which belong to the rigidbodies
156 chuckv 3005
157 gezelter 3007 for (mol = info_->beginMolecule(mi); mol != NULL;
158     mol = info_->nextMolecule(mi)) {
159     for (rb = mol->beginRigidBody(rbIter); rb != NULL;
160     rb = mol->nextRigidBody(rbIter)) {
161     rb->updateAtoms();
162     }
163 gezelter 3017 }
164    
165 gezelter 3007 // outer loop is over the selected StuntDoubles:
166 chuckv 3005
167 gezelter 3007 for (sd = seleMan_.beginSelected(i); sd != NULL;
168     sd = seleMan_.nextSelected(i)) {
169 chuckv 3005
170 gezelter 3011 myIndex = sd->getGlobalIndex();
171 gezelter 3017 nBonds = 0;
172 gezelter 3021
173     for (int l = 0; l <= lMax_; l++) {
174     for (int m = -l; m <= l; m++) {
175     q[std::make_pair(l,m)] = 0.0;
176     }
177 gezelter 3017 }
178 gezelter 3007
179     // inner loop is over all other atoms in the system:
180    
181     for (mol = info_->beginMolecule(mi); mol != NULL;
182     mol = info_->nextMolecule(mi)) {
183     for (atom = mol->beginAtom(ai); atom != NULL;
184     atom = mol->nextAtom(ai)) {
185 chuckv 3005
186 gezelter 3011 if (atom->getGlobalIndex() != myIndex) {
187 chuckv 3005
188 gezelter 3011 vec = sd->getPos() - atom->getPos();
189     currentSnapshot_->wrapVector(vec);
190 gezelter 3010
191 gezelter 3011 // Calculate "bonds" and build Q_lm(r) where
192     // Q_lm = Y_lm(theta(r),phi(r))
193     // The spherical harmonics are wrt any arbitrary coordinate
194     // system, we choose standard spherical coordinates
195    
196     r = vec.length();
197    
198     // Check to see if neighbor is in bond cutoff
199    
200     if (r < rCut_) {
201     costheta = vec.z() / r;
202     phi = atan2(vec.y(), vec.x());
203 gezelter 3021
204     for (int l = 0; l <= lMax_; l++) {
205     sphericalHarmonic.setL(l);
206     for(int m = -l; m <= l; m++){
207     sphericalHarmonic.setM(m);
208     q[std::make_pair(l,m)] += sphericalHarmonic.getValueAt(costheta, phi);
209     }
210 gezelter 3011 }
211     nBonds++;
212     }
213     }
214 gezelter 3007 }
215     }
216 gezelter 3021
217    
218     for (int l = 0; l <= lMax_; l++) {
219     q_l[l] = 0.0;
220     for(int m = -l; m <= l; m++) {
221     q_l[l] += norm(q[std::make_pair(l,m)]);
222     }
223     q_l[l] *= 4.0*NumericConstant::PI/(RealType)(2*l + 1);
224     q_l[l] = sqrt(q_l[l])/(RealType)nBonds;
225     }
226     collectHistogram(q_l);
227    
228 gezelter 3017 Nbonds += nBonds;
229 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
230     for (int m = -l; m <= l; m++) {
231     QBar[std::make_pair(l,m)] += q[std::make_pair(l,m)];
232     }
233 gezelter 3017 }
234     }
235 gezelter 3015 }
236 gezelter 3021
237 gezelter 3015 // Normalize Qbar2
238 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
239     for (int m = -l; m <= l; m++){
240     QBar[std::make_pair(l,m)] /= Nbonds;
241     }
242 gezelter 3007 }
243    
244 gezelter 3015 // Find second order invariant Q_l
245 gezelter 3007
246 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
247     Q2[l] = 0.0;
248     for (int m = -l; m <= l; m++){
249     Q2[l] += norm(QBar[std::make_pair(l,m)]);
250     }
251     Q[l] = sqrt(Q2[l] * 4.0 * NumericConstant::PI / (RealType)(2*l + 1));
252 gezelter 3007 }
253 gezelter 3015
254 gezelter 3021
255 gezelter 3015
256     // Find Third Order Invariant W_l
257    
258 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
259     W[l] = 0.0;
260     lPass = (double)l;
261     for (int m1 = -l; m1 <= l; m1++) {
262     // Zero work array
263     for (int ii = 0; ii < 2*l + 1; ii++){
264     THRCOF[ii] = 0.0;
265     }
266     // Get Wigner coefficients
267     m1Pass = (double)m1;
268    
269     Wigner3jm(&lPass, &lPass, &lPass,
270     &m1Pass, &m2Min, &m2Max,
271     THRCOF, &mSize, &error);
272    
273     for (int mmm = 0; mmm < (int)(m2Max - m2Min); mmm++) {
274     m2 = (int)floor(m2Min) + mmm;
275     m3 = -m1-m2;
276     W[l] += THRCOF[mmm] *
277     QBar[std::make_pair(l,m1)] *
278     QBar[std::make_pair(l,m2)] *
279     QBar[std::make_pair(l,m3)];
280     }
281 gezelter 3015 }
282 gezelter 3009
283 gezelter 3021 W_hat[l] = W[l] / pow(Q2[l], 1.5);
284 gezelter 3007 }
285 gezelter 3015
286 gezelter 3021 writeOrderParameter(Q, W_hat);
287 gezelter 3015 }
288 chuckv 3005
289 gezelter 3021 void BondOrderParameter::collectHistogram(std::vector<RealType> q) {
290 chuckv 3005
291 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
292     if (q[l] >= MinQ_ && q[l] < MaxQ_) {
293     int qbin = (q[l] - MinQ_) / deltaQ_;
294     Q_histogram_[std::make_pair(qbin,l)] += 1;
295     Qcount_[l]++;
296     } else {
297     sprintf( painCave.errMsg,
298     "q_l value outside reasonable range\n");
299     painCave.severity = OOPSE_ERROR;
300     painCave.isFatal = 1;
301     simError();
302     }
303 gezelter 3017 }
304    
305     }
306    
307    
308 gezelter 3021 void BondOrderParameter::writeOrderParameter(std::vector<RealType> Q, std::vector<ComplexType> What) {
309    
310 gezelter 3015 std::ofstream os(getOutputFileName().c_str());
311 gezelter 3021
312 gezelter 3015 if (os.is_open()) {
313 gezelter 3009
314 gezelter 3015 os << "# Bond Order Parameters\n";
315     os << "# selection: (" << selectionScript_ << ")\n";
316 gezelter 3021 for (int l = 0; l <= lMax_; l++) {
317     os << "# \n";
318     os << "# <Q_" << l << ">: " << Q[l] << "\n";
319     os << "# <W_" << l << ">: " << real(What[l]) << "\n";
320     }
321 gezelter 3017 // Normalize by number of frames and write it out:
322 gezelter 3021 for (int i = 0; i < nBins_; ++i) {
323     RealType Qval = MinQ_ + (i + 0.5) * deltaQ_;
324     os << Qval;
325     for (int l = 0; l <= lMax_; l++) {
326     os << "\t" << (RealType)Q_histogram_[std::make_pair(i,l)] / (RealType)Qcount_[l];
327     }
328     os << "\n";
329 gezelter 3017 }
330    
331 gezelter 3015 os.close();
332    
333 gezelter 3009 } else {
334     sprintf(painCave.errMsg, "BondOrderParameter: unable to open %s\n",
335 gezelter 3015 getOutputFileName().c_str());
336 gezelter 3009 painCave.isFatal = 1;
337     simError();
338     }
339     }
340 gezelter 3007 }

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