| 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, 234107 (2008). | 
| 39 | * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010). | 
| 40 | * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011). | 
| 41 | */ | 
| 42 |  | 
| 43 | /** | 
| 44 | * @file Bond.hpp | 
| 45 | * @author    tlin | 
| 46 | * @date  11/01/2004 | 
| 47 | * @version 1.0 | 
| 48 | */ | 
| 49 |  | 
| 50 |  | 
| 51 | #ifndef PRIMITIVES_BOND_HPP | 
| 52 | #define PRIMITIVES_BOND_HPP | 
| 53 |  | 
| 54 | #include "primitives/ShortRangeInteraction.hpp" | 
| 55 | #include "primitives/Atom.hpp" | 
| 56 | #include "types/BondType.hpp" | 
| 57 |  | 
| 58 | namespace OpenMD { | 
| 59 |  | 
| 60 | class Bond : public ShortRangeInteraction { | 
| 61 | public: | 
| 62 | using ShortRangeInteraction::getValue; | 
| 63 | using ShortRangeInteraction::getPrevValue; | 
| 64 | Bond(Atom* atom1, Atom* atom2, BondType* bt) : ShortRangeInteraction(), | 
| 65 | bondType_(bt) { | 
| 66 | atoms_.resize(2); | 
| 67 | atoms_[0] = atom1; | 
| 68 | atoms_[1] = atom2; | 
| 69 | } | 
| 70 | virtual ~Bond() {} | 
| 71 | void calcForce(bool doParticlePot) { | 
| 72 | RealType len; | 
| 73 | RealType dvdr; | 
| 74 | Vector3d r12; | 
| 75 | Vector3d force; | 
| 76 |  | 
| 77 | r12 = atoms_[1]->getPos() - atoms_[0]->getPos(); | 
| 78 | len = r12.length(); | 
| 79 | bondType_->calcForce(len,  potential_, dvdr); | 
| 80 |  | 
| 81 | force = r12 * (-dvdr / len); | 
| 82 |  | 
| 83 | atoms_[0]->addFrc(-force); | 
| 84 | atoms_[1]->addFrc(force); | 
| 85 | if (doParticlePot) { | 
| 86 | atoms_[0]->addParticlePot(potential_); | 
| 87 | atoms_[1]->addParticlePot(potential_); | 
| 88 | } | 
| 89 | } | 
| 90 |  | 
| 91 | RealType getValue(int snap) { | 
| 92 | Vector3d r12 = atoms_[1]->getPos(snap) - atoms_[0]->getPos(snap); | 
| 93 | return r12.length(); | 
| 94 | } | 
| 95 |  | 
| 96 | RealType getPotential() { | 
| 97 | return potential_; | 
| 98 | } | 
| 99 |  | 
| 100 | Atom* getAtomA() { | 
| 101 | return atoms_[0]; | 
| 102 | } | 
| 103 |  | 
| 104 | Atom* getAtomB() { | 
| 105 | return atoms_[1]; | 
| 106 | } | 
| 107 |  | 
| 108 | BondType* getBondType() { | 
| 109 | return bondType_; | 
| 110 | } | 
| 111 |  | 
| 112 | virtual std::string getName() { return name_;} | 
| 113 | /** Sets the name of this bond for selections */ | 
| 114 | virtual void setName(const std::string& name) { name_ = name; } | 
| 115 |  | 
| 116 | void accept(BaseVisitor* v) { | 
| 117 | v->visit(this); | 
| 118 | } | 
| 119 |  | 
| 120 | private: | 
| 121 | RealType potential_; | 
| 122 | BondType* bondType_; /**< bond type */ | 
| 123 | std::string name_; | 
| 124 |  | 
| 125 | }; | 
| 126 | } //end namespace OpenMD | 
| 127 | #endif //PRIMITIVES_BOND_HPP |