| 1 | /* | 
| 2 | * Copyright (C) 2000-2009  The Open Molecular Dynamics Engine (OpenMD) project | 
| 3 | * | 
| 4 | * Contact: gezelter@openscience.org | 
| 5 | * | 
| 6 | * This program is free software; you can redistribute it and/or | 
| 7 | * modify it under the terms of the GNU Lesser General Public License | 
| 8 | * as published by the Free Software Foundation; either version 2.1 | 
| 9 | * of the License, or (at your option) any later version. | 
| 10 | * All we ask is that proper credit is given for our work, which includes | 
| 11 | * - but is not limited to - adding the above copyright notice to the beginning | 
| 12 | * of your source code files, and to any copyright notice that you may distribute | 
| 13 | * with programs based on this work. | 
| 14 | * | 
| 15 | * This program is distributed in the hope that it will be useful, | 
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | 
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the | 
| 18 | * GNU Lesser General Public License for more details. | 
| 19 | * | 
| 20 | * You should have received a copy of the GNU Lesser General Public License | 
| 21 | * along with this program; if not, write to the Free Software | 
| 22 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. | 
| 23 | * | 
| 24 | */ | 
| 25 |  | 
| 26 | #include "primitives/Atom.hpp" | 
| 27 | namespace OpenMD { | 
| 28 |  | 
| 29 | Atom::Atom(AtomType* at) : StuntDouble(otAtom, &Snapshot::atomData) ,atomType_(at) { | 
| 30 |  | 
| 31 | } | 
| 32 |  | 
| 33 | Mat3x3d Atom::getI() { | 
| 34 | return Mat3x3d::identity(); | 
| 35 | } | 
| 36 |  | 
| 37 | std::vector<double> Atom::getGrad() { | 
| 38 | vector<double> grad(3); | 
| 39 | Vector3d force= getFrc(); | 
| 40 |  | 
| 41 | grad[0] = -force[0]; | 
| 42 | grad[1] = -force[1]; | 
| 43 | grad[2] = -force[2]; | 
| 44 |  | 
| 45 | return grad; | 
| 46 | } | 
| 47 |  | 
| 48 | void Atom::accept(BaseVisitor* v) { | 
| 49 | v->visit(this); | 
| 50 | } | 
| 51 |  | 
| 52 | } |