VMD-L Mailing List

From: Bogdan Costescu (bcostescu_at_gmail.com)
Date: Wed Aug 18 2010 - 10:50:43 CDT

On Wed, Aug 18, 2010 at 5:00 PM, John Stone <johns_at_ks.uiuc.edu> wrote:
>  At the present time, there's not a way to rapidly "fast forward"
> to an arbitrary frame of an XTC file in VMD, the time it's currently
> taking is due to the need for the current version of the XTC reader
> plugin to parse its way through the trajectory up to the starting
> frame you have specified.

There is no way to jump to a particular frame in Gromacs either - this
simply comes from the fact that the XTC file format was designed for
high compression but not for high speed access. For this reason, the
only functions provided in the libxdr library offer sequential
reading. So there is nothing to be improved with the way VMD reads the
XTC files :-)

Cheers,
Bogdan