From: Axel Kohlmeyer (
Date: Mon Apr 18 2005 - 10:38:14 CDT

On Mon, 18 Apr 2005, Mgr. Lubos Vrbka wrote:

LV> hello,

hello lubos,

LV> is it possible to somehow read (gzip) compressed trajectories to vmd?

yes. you can do it even without any modification to VMD.
... at least with some platforms. check out

just install it and do:

env LD_PRELOAD=/usr/local/uncompress.o vmd
i have been using it for _ages_ on linux machines.
it works very well and on top of that, read of large
ASCII files via NFS is significantly faster.


LV> i tried googling through the archives and found a message mentioning
LV> undocumented usage of zcat in older versions of file reader plugins.
LV> would it be possible to use zlib functions in the plugins for reading
LV> such files into vmd? zlib handles both compressed and noncompressed
LV> files in the same way...
LV> regards,
LV> lubos

Dr. Axel Kohlmeyer   e-mail:
Lehrstuhl fuer Theoretische Chemie          Phone: ++49 (0)234/32-26673
Ruhr-Universitaet Bochum - NC 03/53         Fax:   ++49 (0)234/32-14045
D-44780 Bochum
If you make something idiot-proof, the universe creates a better idiot.