Line data Source code
1 : /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 : Copyright (c) 2015-2019 The plumed team
3 : (see the PEOPLE file at the root of the distribution for a list of names)
4 :
5 : See http://www.plumed.org for more information.
6 :
7 : This file is part of plumed, version 2.
8 :
9 : plumed is free software: you can redistribute it and/or modify
10 : it under the terms of the GNU Lesser General Public License as published by
11 : the Free Software Foundation, either version 3 of the License, or
12 : (at your option) any later version.
13 :
14 : plumed is distributed in the hope that it will be useful,
15 : but WITHOUT ANY WARRANTY; without even the implied warranty of
16 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 : GNU Lesser General Public License for more details.
18 :
19 : You should have received a copy of the GNU Lesser General Public License
20 : along with plumed. If not, see <http://www.gnu.org/licenses/>.
21 : +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
22 : #include "core/ActionRegister.h"
23 : #include "core/PlumedMain.h"
24 : #include "core/Atoms.h"
25 : #include "tools/Units.h"
26 : #include "tools/Pbc.h"
27 : #include "ActionVolume.h"
28 :
29 : //+PLUMEDOC VOLUMES TETRAHEDRALPORE
30 : /*
31 : This quantity can be used to calculate functions of the distribution of collective variables
32 : for the atoms lie that lie in a box defined by the positions of four atoms at the corners of a tetrahedron.
33 :
34 : Each of the base quantities calculated by a multicolvar can can be assigned to a particular point in three
35 : dimensional space. For example, if we have the coordination numbers for all the atoms in the
36 : system each coordination number can be assumed to lie on the position of the central atom.
37 : Because each base quantity can be assigned to a particular point in space we can calculate functions of the
38 : distribution of base quantities in a particular part of the box by using:
39 :
40 : \f[
41 : \overline{s}_{\tau} = \frac{ \sum_i f(s_i) w(u_i,v_i,w_i) }{ \sum_i w(u_i,v_i,w_i) }
42 : \f]
43 :
44 : where the sum is over the collective variables, \f$s_i\f$, each of which can be thought to be at \f$ (u_i,v_i,z_i)\f$.
45 : The function \f$(s_i)\f$ can be any of the usual LESS_THAN, MORE_THAN, WITHIN etc that are used in all other multicolvars.
46 : Notice that here (at variance with what is done in \ref AROUND) we have transformed from the usual \f$(x_i,y_i,z_i)\f$
47 : position to a position in \f$ (u_i,v_i,z_i)\f$. This is done using a rotation matrix as follows:
48 :
49 : \f[
50 : \left(
51 : \begin{matrix}
52 : u_i \\
53 : v_i \\
54 : w_i
55 : \end{matrix}
56 : \right) = \mathbf{R}
57 : \left(
58 : \begin{matrix}
59 : x_i - x_o \\
60 : y_i - y_o \\
61 : z_i - z_o
62 : \end{matrix}
63 : \right)
64 : \f]
65 :
66 : where \f$\mathbf{R}\f$ is a rotation matrix that is calculated by constructing a set of three orthonormal vectors from the
67 : refererence positions specified by the user. Initially unit vectors are found by calculating the bisector, \f$\mathbf{b}\f$, and
68 : cross product, \f$\mathbf{c}\f$, of the vectors connecting atoms 1 and 2. A third unit vector, \f$\mathbf{p}\f$ is then found by taking the cross
69 : product between the cross product calculated during the first step, \f$\mathbf{c}\f$ and the bisector, \f$\mathbf{b}\f$. From this
70 : second cross product \f$\mathbf{p}\f$ and the bisector \f$\mathbf{b}\f$ two new vectors are calculated using:
71 :
72 : \f[
73 : v_1 = \cos\left(\frac{\pi}{4}\right)\mathbf{b} + \sin\left(\frac{\pi}{4}\right)\mathbf{p} \qquad \textrm{and} \qquad
74 : v_2 = \cos\left(\frac{\pi}{4}\right)\mathbf{b} - \sin\left(\frac{\pi}{4}\right)\mathbf{p}
75 : \f]
76 :
77 : In the previous function \f$ w(u_i,v_i,w_i) \f$ measures whether or not the system is in the subregion of interest. It
78 : is equal to:
79 :
80 : \f[
81 : w(u_i,v_i,w_i) = \int_{0}^{u'} \int_{0}^{v'} \int_{0}^{w'} \textrm{d}u\textrm{d}v\textrm{d}w
82 : K\left( \frac{u - u_i}{\sigma} \right)K\left( \frac{v - v_i}{\sigma} \right)K\left( \frac{w - w_i}{\sigma} \right)
83 : \f]
84 :
85 : where \f$K\f$ is one of the kernel functions described on \ref histogrambead and \f$\sigma\f$ is a bandwidth parameter.
86 : The values of \f$u'\f$ and \f$v'\f$ are found by finding the projections of the vectors connecting atoms 1 and 2 and 1
87 : and 3 \f$v_1\f$ and \f$v_2\f$. This gives four projections: the largest two projections are used in the remainder of
88 : the calculations. \f$w'\f$ is calculated by taking the projection of the vector connecting atoms 1 and 4 on the vector
89 : \f$\mathbf{c}\f$. Notice that the manner by which this box is constructed differs from the way this is done in \ref CAVITY.
90 : This is in fact the only point of difference between these two actions.
91 :
92 : \par Examples
93 :
94 : The following commands tell plumed to calculate the number of atom inside a tetrahedral cavity. The extent of the tetrahedral
95 : cavity is calculated from the positions of atoms 1, 4, 5, and 11, The final value will be labeled cav.
96 :
97 : \plumedfile
98 : d1: DENSITY SPECIES=20-500
99 : TETRAHEDRALPORE DATA=d1 ATOMS=1,4,5,11 SIGMA=0.1 LABEL=cav
100 : \endplumedfile
101 :
102 : The following command tells plumed to calculate the coordination numbers (with other water molecules) for the water
103 : molecules in the tetrahedral cavity described above. The average coordination number and the number of coordination
104 : numbers more than 4 is then calculated. The values of these two quantities are given the labels cav.mean and cav.morethan
105 :
106 : \plumedfile
107 : d1: COORDINATIONNUMBER SPECIES=20-500
108 : CAVITY DATA=d1 ATOMS=1,4,5,11 SIGMA=0.1 MEAN MORE_THAN={RATIONAL R_0=4} LABEL=cav
109 : \endplumedfile
110 :
111 : */
112 : //+ENDPLUMEDOC
113 :
114 : namespace PLMD {
115 : namespace multicolvar {
116 :
117 : class VolumeTetrapore : public ActionVolume {
118 : private:
119 : bool boxout;
120 : OFile boxfile;
121 : double lenunit;
122 : double jacob_det;
123 : double len_bi, len_cross, len_perp, sigma;
124 : Vector origin, bi, cross, perp;
125 : std::vector<Vector> dlbi, dlcross, dlperp;
126 : std::vector<Tensor> dbi, dcross, dperp;
127 : public:
128 : static void registerKeywords( Keywords& keys );
129 : explicit VolumeTetrapore(const ActionOptions& ao);
130 : ~VolumeTetrapore();
131 : void setupRegions();
132 : void update();
133 : double calculateNumberInside( const Vector& cpos, Vector& derivatives, Tensor& vir, std::vector<Vector>& refders ) const ;
134 : };
135 :
136 6452 : PLUMED_REGISTER_ACTION(VolumeTetrapore,"TETRAHEDRALPORE")
137 :
138 1 : void VolumeTetrapore::registerKeywords( Keywords& keys ) {
139 1 : ActionVolume::registerKeywords( keys );
140 4 : keys.add("atoms","ATOMS","the positions of four atoms that define spatial extent of the cavity");
141 3 : keys.addFlag("PRINT_BOX",false,"write out the positions of the corners of the box to an xyz file");
142 4 : keys.add("optional","FILE","the file on which to write out the box coordinates");
143 4 : keys.add("optional","UNITS","( default=nm ) the units in which to write out the corners of the box");
144 1 : }
145 :
146 0 : VolumeTetrapore::VolumeTetrapore(const ActionOptions& ao):
147 : Action(ao),
148 : ActionVolume(ao),
149 : boxout(false),
150 : lenunit(1.0),
151 : dlbi(4),
152 : dlcross(4),
153 : dlperp(4),
154 : dbi(3),
155 : dcross(3),
156 0 : dperp(3)
157 : {
158 : std::vector<AtomNumber> atoms;
159 0 : parseAtomList("ATOMS",atoms);
160 0 : if( atoms.size()!=4 ) error("number of atoms should be equal to four");
161 :
162 0 : log.printf(" boundaries for region are calculated based on positions of atoms : ");
163 0 : for(unsigned i=0; i<atoms.size(); ++i) log.printf("%d ",atoms[i].serial() );
164 0 : log.printf("\n");
165 :
166 0 : boxout=false; parseFlag("PRINT_BOX",boxout);
167 0 : if(boxout) {
168 0 : std::string boxfname; parse("FILE",boxfname);
169 0 : if(boxfname.length()==0) error("no name for box file specified");
170 0 : std::string unitname; parse("UNITS",unitname);
171 0 : if ( unitname.length()>0 ) {
172 0 : Units u; u.setLength(unitname);
173 0 : lenunit=plumed.getAtoms().getUnits().getLength()/u.getLength();
174 : } else {
175 : unitname="nm";
176 : }
177 0 : boxfile.link(*this);
178 0 : boxfile.open( boxfname.c_str() );
179 0 : log.printf(" printing box coordinates on file named %s in %s \n",boxfname.c_str(), unitname.c_str() );
180 : }
181 :
182 0 : checkRead();
183 0 : requestAtoms(atoms);
184 : // We have to readd the dependency because requestAtoms removes it
185 0 : addDependency( getPntrToMultiColvar() );
186 0 : }
187 :
188 0 : VolumeTetrapore::~VolumeTetrapore() {
189 0 : }
190 :
191 0 : void VolumeTetrapore::setupRegions() {
192 : // Make some space for things
193 0 : Vector d1, d2, d3;
194 :
195 : // Retrieve the sigma value
196 0 : sigma=getSigma();
197 : // Set the position of the origin
198 0 : origin=getPosition(0);
199 :
200 : // Get two vectors
201 0 : d1 = pbcDistance(origin,getPosition(1));
202 0 : d2 = pbcDistance(origin,getPosition(2));
203 :
204 : // Find the vector connecting the origin to the top corner of
205 : // the subregion
206 0 : d3 = pbcDistance(origin,getPosition(3));
207 :
208 : // Create a set of unit vectors
209 0 : Vector bisector = d1 + d2; double bmod=bisector.modulo(); bisector=bisector/bmod;
210 :
211 : // bi = d1 / d1l; len_bi=dotProduct( d3, bi );
212 0 : cross = crossProduct( d1, d2 ); double crossmod=cross.modulo();
213 0 : cross = cross / crossmod; len_cross=dotProduct( d3, cross );
214 0 : Vector truep = crossProduct( cross, bisector );
215 :
216 : // These are our true vectors 45 degrees from bisector
217 0 : bi = cos(pi/4.0)*bisector + sin(pi/4.0)*truep;
218 0 : perp = cos(pi/4.0)*bisector - sin(pi/4.0)*truep;
219 :
220 : // And the lengths of the various parts average distance to opposite corners of tetetrahedron
221 0 : len_bi = dotProduct( d1, bi ); double len_bi2 = dotProduct( d2, bi ); unsigned lbi=1;
222 0 : if( len_bi2>len_bi ) { len_bi=len_bi2; lbi=2; }
223 0 : len_perp = dotProduct( d1, perp ); double len_perp2 = dotProduct( d2, perp ); unsigned lpi=1;
224 0 : if( len_perp2>len_perp ) { len_perp=len_perp2; lpi=2; }
225 0 : plumed_assert( lbi!=lpi );
226 :
227 0 : Tensor tcderiv; double cmod3=crossmod*crossmod*crossmod; Vector ucross=crossmod*cross;
228 0 : tcderiv.setCol( 0, crossProduct( d1, Vector(-1.0,0.0,0.0) ) + crossProduct( Vector(-1.0,0.0,0.0), d2 ) );
229 0 : tcderiv.setCol( 1, crossProduct( d1, Vector(0.0,-1.0,0.0) ) + crossProduct( Vector(0.0,-1.0,0.0), d2 ) );
230 0 : tcderiv.setCol( 2, crossProduct( d1, Vector(0.0,0.0,-1.0) ) + crossProduct( Vector(0.0,0.0,-1.0), d2 ) );
231 0 : dcross[0](0,0)=( tcderiv(0,0)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dx/dx
232 0 : dcross[0](0,1)=( tcderiv(0,1)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dx/dy
233 0 : dcross[0](0,2)=( tcderiv(0,2)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dx/dz
234 0 : dcross[0](1,0)=( tcderiv(1,0)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dy/dx
235 0 : dcross[0](1,1)=( tcderiv(1,1)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dy/dy
236 0 : dcross[0](1,2)=( tcderiv(1,2)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dy/dz
237 0 : dcross[0](2,0)=( tcderiv(2,0)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dz/dx
238 0 : dcross[0](2,1)=( tcderiv(2,1)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dz/dy
239 0 : dcross[0](2,2)=( tcderiv(2,2)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dz/dz
240 :
241 0 : tcderiv.setCol( 0, crossProduct( Vector(1.0,0.0,0.0), d2 ) );
242 0 : tcderiv.setCol( 1, crossProduct( Vector(0.0,1.0,0.0), d2 ) );
243 0 : tcderiv.setCol( 2, crossProduct( Vector(0.0,0.0,1.0), d2 ) );
244 0 : dcross[1](0,0)=( tcderiv(0,0)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dx/dx
245 0 : dcross[1](0,1)=( tcderiv(0,1)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dx/dy
246 0 : dcross[1](0,2)=( tcderiv(0,2)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dx/dz
247 0 : dcross[1](1,0)=( tcderiv(1,0)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dy/dx
248 0 : dcross[1](1,1)=( tcderiv(1,1)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dy/dy
249 0 : dcross[1](1,2)=( tcderiv(1,2)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dy/dz
250 0 : dcross[1](2,0)=( tcderiv(2,0)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dz/dx
251 0 : dcross[1](2,1)=( tcderiv(2,1)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dz/dy
252 0 : dcross[1](2,2)=( tcderiv(2,2)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dz/dz
253 :
254 0 : tcderiv.setCol( 0, crossProduct( d1, Vector(1.0,0.0,0.0) ) );
255 0 : tcderiv.setCol( 1, crossProduct( d1, Vector(0.0,1.0,0.0) ) );
256 0 : tcderiv.setCol( 2, crossProduct( d1, Vector(0.0,0.0,1.0) ) );
257 0 : dcross[2](0,0)=( tcderiv(0,0)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dx/dx
258 0 : dcross[2](0,1)=( tcderiv(0,1)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dx/dy
259 0 : dcross[2](0,2)=( tcderiv(0,2)/crossmod - ucross[0]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dx/dz
260 0 : dcross[2](1,0)=( tcderiv(1,0)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dy/dx
261 0 : dcross[2](1,1)=( tcderiv(1,1)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dy/dy
262 0 : dcross[2](1,2)=( tcderiv(1,2)/crossmod - ucross[1]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dy/dz
263 0 : dcross[2](2,0)=( tcderiv(2,0)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,0) + ucross[1]*tcderiv(1,0) + ucross[2]*tcderiv(2,0))/cmod3 ); // dz/dx
264 0 : dcross[2](2,1)=( tcderiv(2,1)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,1) + ucross[1]*tcderiv(1,1) + ucross[2]*tcderiv(2,1))/cmod3 ); // dz/dy
265 0 : dcross[2](2,2)=( tcderiv(2,2)/crossmod - ucross[2]*(ucross[0]*tcderiv(0,2) + ucross[1]*tcderiv(1,2) + ucross[2]*tcderiv(2,2))/cmod3 ); // dz/dz
266 :
267 0 : std::vector<Tensor> dbisector(3);
268 0 : double bmod3=bmod*bmod*bmod; Vector ubisector=bmod*bisector;
269 0 : dbisector[0](0,0)= -2.0/bmod + 2*ubisector[0]*ubisector[0]/bmod3;
270 0 : dbisector[0](0,1)= 2*ubisector[0]*ubisector[1]/bmod3;
271 0 : dbisector[0](0,2)= 2*ubisector[0]*ubisector[2]/bmod3;
272 0 : dbisector[0](1,0)= 2*ubisector[1]*ubisector[0]/bmod3;
273 0 : dbisector[0](1,1)= -2.0/bmod + 2*ubisector[1]*ubisector[1]/bmod3;
274 0 : dbisector[0](1,2)= 2*ubisector[1]*ubisector[2]/bmod3;
275 0 : dbisector[0](2,0)= 2*ubisector[2]*ubisector[0]/bmod3;
276 0 : dbisector[0](2,1)= 2*ubisector[2]*ubisector[1]/bmod3;
277 0 : dbisector[0](2,2)= -2.0/bmod + 2*ubisector[2]*ubisector[2]/bmod3;
278 :
279 0 : dbisector[1](0,0)= 1.0/bmod - ubisector[0]*ubisector[0]/bmod3;
280 0 : dbisector[1](0,1)= -ubisector[0]*ubisector[1]/bmod3;
281 0 : dbisector[1](0,2)= -ubisector[0]*ubisector[2]/bmod3;
282 0 : dbisector[1](1,0)= -ubisector[1]*ubisector[0]/bmod3;
283 0 : dbisector[1](1,1)= 1.0/bmod - ubisector[1]*ubisector[1]/bmod3;
284 0 : dbisector[1](1,2)= -ubisector[1]*ubisector[2]/bmod3;
285 0 : dbisector[1](2,0)= -ubisector[2]*ubisector[0]/bmod3;
286 0 : dbisector[1](2,1)= -ubisector[2]*ubisector[1]/bmod3;
287 0 : dbisector[1](2,2)=1.0/bmod - ubisector[2]*ubisector[2]/bmod3;
288 :
289 0 : dbisector[2](0,0)=1.0/bmod - ubisector[0]*ubisector[0]/bmod3;
290 0 : dbisector[2](0,1)= -ubisector[0]*ubisector[1]/bmod3;
291 0 : dbisector[2](0,2)= -ubisector[0]*ubisector[2]/bmod3;
292 0 : dbisector[2](1,0)= -ubisector[1]*ubisector[0]/bmod3;
293 0 : dbisector[2](1,1)=1.0/bmod - ubisector[1]*ubisector[1]/bmod3;
294 0 : dbisector[2](1,2)= -ubisector[1]*ubisector[2]/bmod3;
295 0 : dbisector[2](2,0)= -ubisector[2]*ubisector[0]/bmod3;
296 0 : dbisector[2](2,1)= -ubisector[2]*ubisector[1]/bmod3;
297 0 : dbisector[2](2,2)=1.0/bmod - ubisector[2]*ubisector[2]/bmod3;
298 :
299 0 : std::vector<Tensor> dtruep(3);
300 0 : dtruep[0].setCol( 0, ( crossProduct( dcross[0].getCol(0), bisector ) + crossProduct( cross, dbisector[0].getCol(0) ) ) );
301 0 : dtruep[0].setCol( 1, ( crossProduct( dcross[0].getCol(1), bisector ) + crossProduct( cross, dbisector[0].getCol(1) ) ) );
302 0 : dtruep[0].setCol( 2, ( crossProduct( dcross[0].getCol(2), bisector ) + crossProduct( cross, dbisector[0].getCol(2) ) ) );
303 :
304 0 : dtruep[1].setCol( 0, ( crossProduct( dcross[1].getCol(0), bisector ) + crossProduct( cross, dbisector[1].getCol(0) ) ) );
305 0 : dtruep[1].setCol( 1, ( crossProduct( dcross[1].getCol(1), bisector ) + crossProduct( cross, dbisector[1].getCol(1) ) ) );
306 0 : dtruep[1].setCol( 2, ( crossProduct( dcross[1].getCol(2), bisector ) + crossProduct( cross, dbisector[1].getCol(2) ) ) );
307 :
308 0 : dtruep[2].setCol( 0, ( crossProduct( dcross[2].getCol(0), bisector ) + crossProduct( cross, dbisector[2].getCol(0) ) ) );
309 0 : dtruep[2].setCol( 1, ( crossProduct( dcross[2].getCol(1), bisector ) + crossProduct( cross, dbisector[2].getCol(1) ) ) );
310 0 : dtruep[2].setCol( 2, ( crossProduct( dcross[2].getCol(2), bisector ) + crossProduct( cross, dbisector[2].getCol(2) ) ) );
311 :
312 : // Now convert these to the derivatives of the true axis
313 0 : for(unsigned i=0; i<3; ++i) {
314 0 : dbi[i] = cos(pi/4.0)*dbisector[i] + sin(pi/4.0)*dtruep[i];
315 0 : dperp[i] = cos(pi/4.0)*dbisector[i] - sin(pi/4.0)*dtruep[i];
316 : }
317 :
318 : // Ensure that all lengths are positive
319 0 : if( len_bi<0 ) {
320 0 : bi=-bi; len_bi=-len_bi;
321 0 : for(unsigned i=0; i<3; ++i) dbi[i]*=-1.0;
322 : }
323 0 : if( len_cross<0 ) {
324 0 : cross=-cross; len_cross=-len_cross;
325 0 : for(unsigned i=0; i<3; ++i) dcross[i]*=-1.0;
326 : }
327 0 : if( len_perp<0 ) {
328 0 : perp=-perp; len_perp=-len_perp;
329 0 : for(unsigned i=0; i<3; ++i) dperp[i]*=-1.0;
330 : }
331 0 : if( len_bi<=0 || len_cross<=0 || len_bi<=0 ) plumed_merror("Invalid box coordinates");
332 :
333 : // Now derivatives of lengths
334 0 : Tensor dd3( Tensor::identity() ); Vector ddb2=d1; if( lbi==2 ) ddb2=d2;
335 0 : dlbi[1].zero(); dlbi[2].zero(); dlbi[3].zero();
336 0 : dlbi[0] = matmul(ddb2,dbi[0]) - matmul(bi,dd3);
337 0 : dlbi[lbi] = matmul(ddb2,dbi[lbi]) + matmul(bi,dd3); // Derivative wrt d1
338 :
339 0 : dlcross[0] = matmul(d3,dcross[0]) - matmul(cross,dd3);
340 0 : dlcross[1] = matmul(d3,dcross[1]);
341 0 : dlcross[2] = matmul(d3,dcross[2]);
342 0 : dlcross[3] = matmul(cross,dd3);
343 :
344 0 : ddb2=d1; if( lpi==2 ) ddb2=d2;
345 0 : dlperp[1].zero(); dlperp[2].zero(); dlperp[3].zero();
346 0 : dlperp[0] = matmul(ddb2,dperp[0]) - matmul( perp, dd3 );
347 0 : dlperp[lpi] = matmul(ddb2,dperp[lpi]) + matmul(perp, dd3);
348 :
349 : // Need to calculate the jacobian
350 0 : Tensor jacob;
351 0 : jacob(0,0)=bi[0]; jacob(1,0)=bi[1]; jacob(2,0)=bi[2];
352 0 : jacob(0,1)=cross[0]; jacob(1,1)=cross[1]; jacob(2,1)=cross[2];
353 0 : jacob(0,2)=perp[0]; jacob(1,2)=perp[1]; jacob(2,2)=perp[2];
354 0 : jacob_det = fabs( jacob.determinant() );
355 0 : }
356 :
357 0 : void VolumeTetrapore::update() {
358 0 : if(boxout) {
359 0 : boxfile.printf("%d\n",8);
360 0 : const Tensor & t(getPbc().getBox());
361 0 : if(getPbc().isOrthorombic()) {
362 0 : boxfile.printf(" %f %f %f\n",lenunit*t(0,0),lenunit*t(1,1),lenunit*t(2,2));
363 : } else {
364 0 : boxfile.printf(" %f %f %f %f %f %f %f %f %f\n",
365 0 : lenunit*t(0,0),lenunit*t(0,1),lenunit*t(0,2),
366 0 : lenunit*t(1,0),lenunit*t(1,1),lenunit*t(1,2),
367 0 : lenunit*t(2,0),lenunit*t(2,1),lenunit*t(2,2)
368 : );
369 : }
370 0 : boxfile.printf("AR %f %f %f \n",lenunit*origin[0],lenunit*origin[1],lenunit*origin[2]);
371 0 : Vector ut, vt, wt;
372 0 : ut = origin + len_bi*bi;
373 0 : vt = origin + len_cross*cross;
374 0 : wt = origin + len_perp*perp;
375 0 : boxfile.printf("AR %f %f %f \n",lenunit*(ut[0]), lenunit*(ut[1]), lenunit*(ut[2]) );
376 0 : boxfile.printf("AR %f %f %f \n",lenunit*(vt[0]), lenunit*(vt[1]), lenunit*(vt[2]) );
377 0 : boxfile.printf("AR %f %f %f \n",lenunit*(wt[0]), lenunit*(wt[1]), lenunit*(wt[2]) );
378 0 : boxfile.printf("AR %f %f %f \n",lenunit*(vt[0]+len_bi*bi[0]),
379 0 : lenunit*(vt[1]+len_bi*bi[1]),
380 0 : lenunit*(vt[2]+len_bi*bi[2]) );
381 0 : boxfile.printf("AR %f %f %f \n",lenunit*(ut[0]+len_perp*perp[0]),
382 0 : lenunit*(ut[1]+len_perp*perp[1]),
383 0 : lenunit*(ut[2]+len_perp*perp[2]) );
384 0 : boxfile.printf("AR %f %f %f \n",lenunit*(vt[0]+len_perp*perp[0]),
385 0 : lenunit*(vt[1]+len_perp*perp[1]),
386 0 : lenunit*(vt[2]+len_perp*perp[2]) );
387 0 : boxfile.printf("AR %f %f %f \n",lenunit*(vt[0]+len_perp*perp[0]+len_bi*bi[0]),
388 0 : lenunit*(vt[1]+len_perp*perp[1]+len_bi*bi[1]),
389 0 : lenunit*(vt[2]+len_perp*perp[2]+len_bi*bi[2]) );
390 : }
391 0 : }
392 :
393 0 : double VolumeTetrapore::calculateNumberInside( const Vector& cpos, Vector& derivatives, Tensor& vir, std::vector<Vector>& rderiv ) const {
394 : // Setup the histogram bead
395 0 : HistogramBead bead; bead.isNotPeriodic(); bead.setKernelType( getKernelType() );
396 :
397 : // Calculate distance of atom from origin of new coordinate frame
398 0 : Vector datom=pbcDistance( origin, cpos );
399 : double ucontr, uder, vcontr, vder, wcontr, wder;
400 :
401 : // Calculate contribution from integral along bi
402 0 : bead.set( 0, len_bi, sigma );
403 0 : double upos=dotProduct( datom, bi );
404 0 : ucontr=bead.calculate( upos, uder );
405 0 : double udlen=bead.uboundDerivative( upos );
406 0 : double uder2 = bead.lboundDerivative( upos ) - udlen;
407 :
408 : // Calculate contribution from integral along cross
409 0 : bead.set( 0, len_cross, sigma );
410 0 : double vpos=dotProduct( datom, cross );
411 0 : vcontr=bead.calculate( vpos, vder );
412 0 : double vdlen=bead.uboundDerivative( vpos );
413 0 : double vder2 = bead.lboundDerivative( vpos ) - vdlen;
414 :
415 : // Calculate contribution from integral along perp
416 0 : bead.set( 0, len_perp, sigma );
417 0 : double wpos=dotProduct( datom, perp );
418 0 : wcontr=bead.calculate( wpos, wder );
419 0 : double wdlen=bead.uboundDerivative( wpos );
420 0 : double wder2 = bead.lboundDerivative( wpos ) - wdlen;
421 :
422 0 : Vector dfd; dfd[0]=uder*vcontr*wcontr; dfd[1]=ucontr*vder*wcontr; dfd[2]=ucontr*vcontr*wder;
423 0 : derivatives[0] = (dfd[0]*bi[0]+dfd[1]*cross[0]+dfd[2]*perp[0]);
424 0 : derivatives[1] = (dfd[0]*bi[1]+dfd[1]*cross[1]+dfd[2]*perp[1]);
425 0 : derivatives[2] = (dfd[0]*bi[2]+dfd[1]*cross[2]+dfd[2]*perp[2]);
426 0 : double tot = ucontr*vcontr*wcontr*jacob_det;
427 :
428 : // Add reference atom derivatives
429 0 : dfd[0]=uder2*vcontr*wcontr; dfd[1]=ucontr*vder2*wcontr; dfd[2]=ucontr*vcontr*wder2;
430 0 : Vector dfld; dfld[0]=udlen*vcontr*wcontr; dfld[1]=ucontr*vdlen*wcontr; dfld[2]=ucontr*vcontr*wdlen;
431 0 : rderiv[0] = dfd[0]*matmul(datom,dbi[0]) + dfd[1]*matmul(datom,dcross[0]) + dfd[2]*matmul(datom,dperp[0]) +
432 0 : dfld[0]*dlbi[0] + dfld[1]*dlcross[0] + dfld[2]*dlperp[0] - derivatives;
433 0 : rderiv[1] = dfd[0]*matmul(datom,dbi[1]) + dfd[1]*matmul(datom,dcross[1]) + dfd[2]*matmul(datom,dperp[1]) +
434 0 : dfld[0]*dlbi[1] + dfld[1]*dlcross[1] + dfld[2]*dlperp[1];
435 0 : rderiv[2] = dfd[0]*matmul(datom,dbi[2]) + dfd[1]*matmul(datom,dcross[2]) + dfd[2]*matmul(datom,dperp[2]) +
436 0 : dfld[0]*dlbi[2] + dfld[1]*dlcross[2] + dfld[2]*dlperp[2];
437 0 : rderiv[3] = dfld[0]*dlbi[3] + dfld[1]*dlcross[3] + dfld[2]*dlperp[3];
438 :
439 0 : vir.zero(); vir-=Tensor( cpos,derivatives );
440 0 : for(unsigned i=0; i<4; ++i) {
441 0 : vir -= Tensor( getPosition(i), rderiv[i] );
442 : }
443 :
444 0 : return tot;
445 : }
446 :
447 : }
448 4839 : }
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