[gmx-users] position restraint

[Kun Huang]

Dear Gromacs users:

I am trying to extract the constraint energy imposed by position restraint.
I extract the coordinate of the restraint atom and want to calculated
directly by using the harmonic potential. The question is : Does the
reference position come from the .gro file as the input in mdrun? It seems
to me that that's the only possible source as I didn't specify it anywhere.

Thanks,
-- 
Kun Huang
Department of Physics, Rensselaer Polytechnic Institute.
Troy, NY. 12180.
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