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/* |
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* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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* |
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* The University of Notre Dame grants you ("Licensee") a |
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* non-exclusive, royalty free, license to use, modify and |
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* redistribute this software in source and binary code form, provided |
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* that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the |
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* distribution. |
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* |
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* This software is provided "AS IS," without a warranty of any |
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* kind. All express or implied conditions, representations and |
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* warranties, including any implied warranty of merchantability, |
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* fitness for a particular purpose or non-infringement, are hereby |
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* excluded. The University of Notre Dame and its licensors shall not |
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* be liable for any damages suffered by licensee as a result of |
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* using, modifying or distributing the software or its |
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* derivatives. In no event will the University of Notre Dame or its |
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* licensors be liable for any lost revenue, profit or data, or for |
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* direct, indirect, special, consequential, incidental or punitive |
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* damages, however caused and regardless of the theory of liability, |
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* arising out of the use of or inability to use software, even if the |
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* University of Notre Dame has been advised of the possibility of |
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* such damages. |
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* |
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* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your |
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* research, please cite the appropriate papers when you publish your |
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* work. Good starting points are: |
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* |
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* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005). |
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* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006). |
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* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008). |
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* [4] Vardeman & Gezelter, in progress (2009). |
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*/ |
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|
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#ifndef PRIMITIVES_CUTOFFGROUP_HPP |
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|
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#define PRIMITIVES_CUTOFFGROUP_HPP |
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|
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#include "primitives/Atom.hpp" |
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#include "math/Vector3.hpp" |
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|
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namespace OpenMD { |
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class CutoffGroup { |
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public: |
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|
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CutoffGroup() : |
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snapshotMan_(NULL) { |
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|
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storage_ = &Snapshot::cgData; |
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haveTotalMass = false; |
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totalMass = 0.0; |
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} |
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|
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/** |
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* Sets the Snapshot Manager of this cutoffGroup |
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*/ |
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void setSnapshotManager(SnapshotManager* sman) { |
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snapshotMan_ = sman; |
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} |
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|
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void addAtom(Atom *atom) { |
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cutoffAtomList.push_back(atom); |
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} |
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|
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Atom *beginAtom(std::vector<Atom *>::iterator & i) { |
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i = cutoffAtomList.begin(); |
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return i != cutoffAtomList.end() ? *i : NULL; |
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} |
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|
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Atom *nextAtom(std::vector<Atom *>::iterator & i) { |
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i++; |
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return i != cutoffAtomList.end() ? *i : NULL; |
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} |
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|
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std::vector<Atom*> getAtoms() { |
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return cutoffAtomList; |
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} |
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RealType getMass() { |
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std::vector<Atom *>::iterator i; |
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Atom * atom; |
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RealType mass; |
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|
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if (!haveTotalMass) |
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{ |
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totalMass = 0; |
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|
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for (atom = beginAtom(i); atom != NULL; atom = nextAtom(i)) |
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{ |
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mass = atom->getMass(); |
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totalMass += mass; |
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} |
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|
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haveTotalMass = true; |
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} |
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|
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return totalMass; |
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} |
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|
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void updateCOM() { |
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std::vector<Atom *>::iterator i; |
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Atom * atom; |
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|
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DataStorage& data = snapshotMan_->getCurrentSnapshot()->*storage_; |
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|
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totalMass = getMass(); |
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|
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if (cutoffAtomList.size() == 1) |
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{ |
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data.position[localIndex_] = beginAtom(i)->getPos(); |
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} else |
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{ |
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data.position[localIndex_] = V3Zero; |
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for (atom = beginAtom(i); atom != NULL; atom = nextAtom(i)) |
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{ |
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data.position[localIndex_] += atom->getMass() * atom->getPos(); |
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} |
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data.position[localIndex_] /= totalMass; |
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} |
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} |
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|
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Vector3d getPos() { |
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return ((snapshotMan_->getCurrentSnapshot())->*storage_).position[localIndex_]; |
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} |
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|
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int getNumAtom() { |
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return cutoffAtomList.size(); |
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} |
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|
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int getGlobalIndex() { |
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return globalIndex; |
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} |
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|
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void setGlobalIndex(int id) { |
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this->globalIndex = id; |
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} |
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|
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/** |
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* Returns the local index of this cutoffGroup |
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* @return the local index of this cutoffGroup |
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*/ |
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int getLocalIndex() { |
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return localIndex_; |
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} |
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|
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/** |
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* Sets the local index of this cutoffGroup |
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* @param index new index to be set |
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*/ |
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void setLocalIndex(int index) { |
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localIndex_ = index; |
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} |
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|
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private: |
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|
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std::vector<Atom *> cutoffAtomList; |
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bool haveTotalMass; |
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RealType totalMass; |
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int globalIndex; |
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|
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int localIndex_; |
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DataStoragePointer storage_; |
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SnapshotManager* snapshotMan_; |
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|
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}; |
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} //end namespace OpenMD |
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#endif //PRIMITIVES_CUTOFFGROUP_HPP |
