[Chimera-users] how to make rotation slabs smaller

[Tom Goddard]

There is currently no option to control the slab size for slabs made 
with "measure rotation #0 #1 showslabs true".  The size of the slab 
depends on the distance of the center of the bounding box of the first 
model (#0) to the rotation axis.  The slab passes through that center point.

You can edit Chimera file

     chimera/share/MatchDomains/__init__.py

changing the line

     e = 2       # Factor for enlarging square

to produce a smaller slab (e.g. e = 1) the restart Chimera.

I'll add a feature request to allow the measure rotation command to take 
a slab size option.

     Tom


> Hello,
>
> I am trying to measure rotation using the "measure rotation showslabs 
> t" command in chimera which gives very large slabs.
> How can I make the slabs smaller ?
>
> Any help gratefully appreciated.
> Thanks
>