src/brains/Snapshot.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).                        
 */
  
/**
 * @file Snapshot.cpp
 * @author tlin
 * @date 11/11/2004
 * @time 10:56am
 * @version 1.0
 */

#include "brains/Snapshot.hpp"
#include "utils/NumericConstant.hpp"
#include "utils/simError.h"
#include "utils/Utility.hpp"
#include <cstdio>

namespace OpenMD {

  void  Snapshot::setHmat(const Mat3x3d& m) {
    hmat_ = m;
    invHmat_ = hmat_.inverse();
    

    //prepare fortran Hmat 
    RealType fortranHmat[9];
    RealType fortranInvHmat[9];
    hmat_.getArray(fortranHmat);
    invHmat_.getArray(fortranInvHmat);

    //determine whether the box is orthoTolerance or not
    int oldOrthoRhombic = orthoRhombic_;
    
    RealType smallDiag = fabs(hmat_(0, 0));
    if(smallDiag > fabs(hmat_(1, 1))) smallDiag = fabs(hmat_(1, 1));
    if(smallDiag > fabs(hmat_(2, 2))) smallDiag = fabs(hmat_(2, 2));    
    RealType tol = smallDiag * orthoTolerance_;

    orthoRhombic_ = 1;

    for (int i = 0; i < 3; i++ ) {
      for (int j = 0 ; j < 3; j++) {
        if (i != j) {
          if (orthoRhombic_) {
            if ( fabs(hmat_(i, j)) >= tol)
              orthoRhombic_ = 0;
          }        
        }
      }
    }

    if( oldOrthoRhombic != orthoRhombic_ ){

      if( orthoRhombic_ ) {
        sprintf( painCave.errMsg,
                 "OpenMD is switching from the default Non-Orthorhombic\n"
                 "\tto the faster Orthorhombic periodic boundary computations.\n"
                 "\tThis is usually a good thing, but if you want the\n"
                 "\tNon-Orthorhombic computations, make the orthoBoxTolerance\n"
                 "\tvariable ( currently set to %G ) smaller.\n",
                 orthoTolerance_);
        painCave.severity = OPENMD_INFO;
        simError();
      }
      else {
        sprintf( painCave.errMsg,
                 "OpenMD is switching from the faster Orthorhombic to the more\n"
                 "\tflexible Non-Orthorhombic periodic boundary computations.\n"
                 "\tThis is usually because the box has deformed under\n"
                 "\tNPTf integration. If you want to live on the edge with\n"
                 "\tthe Orthorhombic computations, make the orthoBoxTolerance\n"
                 "\tvariable ( currently set to %G ) larger.\n",
                 orthoTolerance_);
        painCave.severity = OPENMD_WARNING;
        simError();
      }
    }    

    //notify fortran simulation box has changed
    setFortranBox(fortranHmat, fortranInvHmat, &orthoRhombic_);
  }


  void Snapshot::wrapVector(Vector3d& pos) {

    int i;
    Vector3d scaled;

    if( !orthoRhombic_ ){

      // calc the scaled coordinates.
      scaled = invHmat_* pos;

      // wrap the scaled coordinates
      for (i = 0; i < 3; ++i) {
        scaled[i] -= roundMe(scaled[i]);
      }

      // calc the wrapped real coordinates from the wrapped scaled coordinates
      pos = hmat_ * scaled;    

    } else {//if it is orthoRhombic, we could improve efficiency by only caculating the diagonal element
    
      // calc the scaled coordinates.
      for (i=0; i<3; i++) {
        scaled[i] = pos[i] * invHmat_(i, i);
      }
        
      // wrap the scaled coordinates
      for (i = 0; i < 3; ++i) {
        scaled[i] -= roundMe(scaled[i]);
      }

      // calc the wrapped real coordinates from the wrapped scaled coordinates
      for (i=0; i<3; i++) {
        pos[i] = scaled[i] * hmat_(i, i);
      }
        
    }

  }

  Vector3d Snapshot::getCOM() {
    if( !hasCOM_ ) {
      sprintf( painCave.errMsg, "COM was requested before COM was computed!\n");
      painCave.severity = OPENMD_ERROR;
      simError();
    }
    return COM_;
  }
  
  Vector3d Snapshot::getCOMvel() {
    if( !hasCOM_ ) {
      sprintf( painCave.errMsg, "COMvel was requested before COM was computed!\n");
      painCave.severity = OPENMD_ERROR;
      simError();
    }
    return COMvel_;
  }
  
  Vector3d Snapshot::getCOMw() {
    if( !hasCOM_ ) {
      sprintf( painCave.errMsg, "COMw was requested before COM was computed!\n");
      painCave.severity = OPENMD_ERROR;
      simError();
    }
    return COMw_;
  }
 
}
  
Revision:	1442
Committed:	Mon May 10 17:28:26 2010 UTC (15 years, 5 months ago) by gezelter
File size:	5912 byte(s)
Log Message:	Adding property set to svn entries
#	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	/**
43	* @file Snapshot.cpp
44	* @author tlin
45	* @date 11/11/2004
46	* @time 10:56am
47	* @version 1.0
48	*/
49
50	#include "brains/Snapshot.hpp"
51	#include "utils/NumericConstant.hpp"
52	#include "utils/simError.h"
53	#include "utils/Utility.hpp"
54	#include <cstdio>
55
56	namespace OpenMD {
57
58	void Snapshot::setHmat(const Mat3x3d& m) {
59	hmat_ = m;
60	invHmat_ = hmat_.inverse();
61
62
63	//prepare fortran Hmat
64	RealType fortranHmat[9];
65	RealType fortranInvHmat[9];
66	hmat_.getArray(fortranHmat);
67	invHmat_.getArray(fortranInvHmat);
68
69	//determine whether the box is orthoTolerance or not
70	int oldOrthoRhombic = orthoRhombic_;
71
72	RealType smallDiag = fabs(hmat_(0, 0));
73	if(smallDiag > fabs(hmat_(1, 1))) smallDiag = fabs(hmat_(1, 1));
74	if(smallDiag > fabs(hmat_(2, 2))) smallDiag = fabs(hmat_(2, 2));
75	RealType tol = smallDiag * orthoTolerance_;
76
77	orthoRhombic_ = 1;
78
79	for (int i = 0; i < 3; i++ ) {
80	for (int j = 0 ; j < 3; j++) {
81	if (i != j) {
82	if (orthoRhombic_) {
83	if ( fabs(hmat_(i, j)) >= tol)
84	orthoRhombic_ = 0;
85	}
86	}
87	}
88	}
89
90	if( oldOrthoRhombic != orthoRhombic_ ){
91
92	if( orthoRhombic_ ) {
93	sprintf( painCave.errMsg,
94	"OpenMD is switching from the default Non-Orthorhombic\n"
95	"\tto the faster Orthorhombic periodic boundary computations.\n"
96	"\tThis is usually a good thing, but if you want the\n"
97	"\tNon-Orthorhombic computations, make the orthoBoxTolerance\n"
98	"\tvariable ( currently set to %G ) smaller.\n",
99	orthoTolerance_);
100	painCave.severity = OPENMD_INFO;
101	simError();
102	}
103	else {
104	sprintf( painCave.errMsg,
105	"OpenMD is switching from the faster Orthorhombic to the more\n"
106	"\tflexible Non-Orthorhombic periodic boundary computations.\n"
107	"\tThis is usually because the box has deformed under\n"
108	"\tNPTf integration. If you want to live on the edge with\n"
109	"\tthe Orthorhombic computations, make the orthoBoxTolerance\n"
110	"\tvariable ( currently set to %G ) larger.\n",
111	orthoTolerance_);
112	painCave.severity = OPENMD_WARNING;
113	simError();
114	}
115	}
116
117	//notify fortran simulation box has changed
118	setFortranBox(fortranHmat, fortranInvHmat, &orthoRhombic_);
119	}
120
121
122	void Snapshot::wrapVector(Vector3d& pos) {
123
124	int i;
125	Vector3d scaled;
126
127	if( !orthoRhombic_ ){
128
129	// calc the scaled coordinates.
130	scaled = invHmat_* pos;
131
132	// wrap the scaled coordinates
133	for (i = 0; i < 3; ++i) {
134	scaled[i] -= roundMe(scaled[i]);
135	}
136
137	// calc the wrapped real coordinates from the wrapped scaled coordinates
138	pos = hmat_ * scaled;
139
140	} else {//if it is orthoRhombic, we could improve efficiency by only caculating the diagonal element
141
142	// calc the scaled coordinates.
143	for (i=0; i<3; i++) {
144	scaled[i] = pos[i] * invHmat_(i, i);
145	}
146
147	// wrap the scaled coordinates
148	for (i = 0; i < 3; ++i) {
149	scaled[i] -= roundMe(scaled[i]);
150	}
151
152	// calc the wrapped real coordinates from the wrapped scaled coordinates
153	for (i=0; i<3; i++) {
154	pos[i] = scaled[i] * hmat_(i, i);
155	}
156
157	}
158
159	}
160
161	Vector3d Snapshot::getCOM() {
162	if( !hasCOM_ ) {
163	sprintf( painCave.errMsg, "COM was requested before COM was computed!\n");
164	painCave.severity = OPENMD_ERROR;
165	simError();
166	}
167	return COM_;
168	}
169
170	Vector3d Snapshot::getCOMvel() {
171	if( !hasCOM_ ) {
172	sprintf( painCave.errMsg, "COMvel was requested before COM was computed!\n");
173	painCave.severity = OPENMD_ERROR;
174	simError();
175	}
176	return COMvel_;
177	}
178
179	Vector3d Snapshot::getCOMw() {
180	if( !hasCOM_ ) {
181	sprintf( painCave.errMsg, "COMw was requested before COM was computed!\n");
182	painCave.severity = OPENMD_ERROR;
183	simError();
184	}
185	return COMw_;
186	}
187
188	}
189