[gmx-users] Is there still interest in rigid-body simulation?

[Adam Herbst]

Hi all,
I have seen a few posts on gmx-users indicating a desire to treat certain
atom groups as rigid bodies in MD simulations.  I just started implementing
this, and so far I have it working for translational forces (not rotation,
though this should be simple to add), even when the group is split over
multiple processors.  At the moment I have the rigid body groups specified
as freeze groups in the mdp file, but there could be a separate option.
 Would anyone else find this useful?  The problem is that: (a) I am
modifying GROMACS 4.5.1, so I am some months out of date, and (b) my code is
probably not to spec.  If it is worthwhile, I can restart from 4.5.4 (the
code modifications are quite small) and make an effort to conform to coding
standard.  Best,

Adam Herbst
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