At 21:49 28/09/2000, Armel Le Bail <[EMAIL PROTECTED]> wrote:

>Good news, the Chime display includes the cell axes if you select that
>option.
>
>Bad news, when saving the PDB file for seeing it at home by Chime,
>the cell axes have disappeared. Or maybe I have done something wrong ?

Thanks Armel.  It's actually bad news at present :-)  So far as I know, 
PDB/Chime has no way of specifying the unit cell (I would like to be 
corrected here).  All it can do is switch on the "bounding box".  In the 
case of orthogonal structures this does correspond with the unit cell, and 
you can do this manually using the right mouse button in Windows.

Of course I can draw a unit cell by giving the co-ordinates of the 8 
vertices and instructions to connect them, but I haven't got around to this 
yet. I'm not sure how useful PDB/Chime is for inorganic structures anyway; 
I tried to convince them to allow drawing of polyhedrae, but they weren't 
interested.

I am told that a stripped down VRML viewer to draw only spheres, cylinders, 
lines and polyhedrae would be  lot faster than CosmoPlayer et al., so maybe 
that's the way to go. On the other hand, my son has an 800 MHz PC at home 
with the latest NVidea graphics card, which is faster at 3D than anyone 
could really want :-)

Best wishes, Alan.

Alan Hewat, ILL Grenoble, FRANCE  <[EMAIL PROTECTED]>  tel (33) 4.76.20.72.13
http://www.ill.fr/dif/AlanHewat.htm fax (33) 4.76.20.76.48 
ftp://ftp.ill.fr/pub/dif

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