Re: [AMBER-Developers] Dihedral Force Constants

From: Ross Walker <ross.rosswalker.co.uk>
Date: Wed, 9 Mar 2011 15:55:35 -0800

> Sleap is printing only positive values for DIHEDRAL_FORCE_CONSTANT. In
> the Glycam force field, instead of phase shifts, we use positive and
negative
> force constants.
>
> Is that on purpose?

Of course it is on purpose... There is no such thing as a bug in AMBER. They
are just 'negative enhancements'.

Jason and I have fixed this so the latest git tree should work properly.
Essentially sleap was doing a global replace of '-' with ' ' on a line in
order to split the atom typing (CA-CA-CA-CA) into 4 elements = /fail.

All the best
Ross

/\
\/
|\oss Walker

---------------------------------------------------------
| Assistant Research Professor |
| San Diego Supercomputer Center |
| Adjunct Assistant Professor |
| Dept. of Chemistry and Biochemistry |
| University of California San Diego |
| NVIDIA Fellow |
| http://www.rosswalker.co.uk | http://www.wmd-lab.org/ |
| Tel: +1 858 822 0854 | EMail:- ross.rosswalker.co.uk |
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Received on Wed Mar 09 2011 - 16:00:12 PST
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