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#include "selection/DistanceFinder.hpp" |
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#include "primitives/Molecule.hpp" |
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namespace OpenMD { |
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#ifdef IS_MPI |
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#include <mpi.h> |
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#endif |
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namespace OpenMD { |
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DistanceFinder::DistanceFinder(SimInfo* info) : info_(info) { |
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nStuntDoubles_ = info_->getNGlobalAtoms() + info_->getNGlobalRigidBodies(); |
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stuntdoubles_.resize(nStuntDoubles_); |
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Atom* atom; |
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Molecule::RigidBodyIterator rbIter; |
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RigidBody* rb; |
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for (mol = info_->beginMolecule(mi); mol != NULL; |
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mol = info_->nextMolecule(mi)) { |
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StuntDouble * center; |
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Vector3d centerPos; |
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Snapshot* currSnapshot = info_->getSnapshotManager()->getCurrentSnapshot(); |
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OpenMDBitSet bsResult(nStuntDoubles_); |
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OpenMDBitSet bsResult(nStuntDoubles_); |
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assert(bsResult.size() == bs.size()); |
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#ifdef IS_MPI |
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int mol; |
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int proc; |
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RealType data[3]; |
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int worldRank = MPI::COMM_WORLD.Get_rank(); |
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#endif |
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for (unsigned int j = 0; j < stuntdoubles_.size(); ++j) { |
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if (stuntdoubles_[j]->isRigidBody()) { |
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RigidBody* rb = static_cast<RigidBody*>(stuntdoubles_[j]); |
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rb->updateAtoms(); |
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} |
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} |
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// This will fail in parallel because i might not be on this processor. |
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OpenMDBitSet bsTemp(nStuntDoubles_); |
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bsTemp = bs; |
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bsTemp.parallelReduce(); |
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for (int i = bs.firstOnBit(); i != -1; i = bs.nextOnBit(i)) { |
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for (int i = bsTemp.firstOnBit(); i != -1; i = bsTemp.nextOnBit(i)) { |
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// Now, if we own stuntdouble i, we can use the position, but in |
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// parallel, we'll need to let everyone else know what that |
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// position is! |
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#ifdef IS_MPI |
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mol = info_->getGlobalMolMembership(i); |
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proc = info_->getMolToProc(mol); |
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if (proc == worldRank) { |
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center = stuntdoubles_[i]; |
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centerPos = center->getPos(); |
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data[0] = centerPos.x(); |
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data[1] = centerPos.y(); |
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data[2] = centerPos.z(); |
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MPI::COMM_WORLD.Bcast(data, 3, MPI::REALTYPE, proc); |
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} else { |
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MPI::COMM_WORLD.Bcast(data, 3, MPI::REALTYPE, proc); |
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centerPos = Vector3d(data); |
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} |
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#else |
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center = stuntdoubles_[i]; |
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centerPos = center->getPos(); |
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#endif |
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for (unsigned int j = 0; j < stuntdoubles_.size(); ++j) { |
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Vector3d r =centerPos - stuntdoubles_[j]->getPos(); |
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currSnapshot->wrapVector(r); |
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} |
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} |
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} |
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return bsResult; |
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} |
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} |
