That's a bug. Fixed for Jmol 12.2.27 and 12.3.27.
On Thu, May 24, 2012 at 4:57 PM, Christopher King <[email protected]> wrote:
> Back in March I commented on how the "draw pointgroup" command didn't do
> what I expected. Further playing around shows that the scale value can
> only be set once. Here are steps to reproduce the problem.
>
> Load a file with the desired symmetry, such as ethane. (Or, just go to
> http://wiki.jmol.org/index.php/Jmol_in_Pop-up, and see the behavior
> there.)
> Open the console, and enter "draw pointgroup c3 1 scale 1.5". One of the
> C3 axis is displayed, with its axis a bit long, since it is scaled.
> Enter "draw pointgroup c3 1 scale 0.8". Although the scale value is
> smaller, nothing changes. Expected behavior: the axis would become
> shorter.
> Close and restart Jmol (I'm using 12.3.26).
> Load the same file.
> Enter "draw pointgroup c3 1 scale 0.8". Notice that the axis is much
> shorter, since the scale value is smaller.
> Enter "draw pointgroup c3 1 scale 1.5". Although the scale value is
> larger, nothing changes. Expected behavior: the axis would become longer.
>
> It appears that Jmol checks to see if the scale value has been set. If it
> has, it doesn't allow the value to be changed, so the only way to change it
> is to restart the program. Also, if the first command is, e.g., "draw
> pointgroup c3 1", then scale is probably given an initial value, because a
> second command of "draw pointgroup c3 1 scale 1.5" does nothing.
>
>
>
> On 3/26/2012 11:42 AM, Robert Hanson wrote:
>
> draw pointgroup is very special -- it creates a whole set of objects. I
> don't think "scale" is an appropriate keyword, since you have points and
> lines and planes and such. Jmol wouldn't know what to do with that scale.
> So you have to go with what it gives you. You could hack it by saving the
> state, then going in with a text editor and adding the scale to the various
> DRAW commands that represent all the different elements. Not saying that's
> a solution....
>
> Bob
>
>
> On Mon, Mar 26, 2012 at 8:08 AM, Christopher King <[email protected]> wrote:
>
>> Good day,
>> I’ve loaded the structure of ethane into Jmol 12.3.18. (The same
>> behavior is also observed athttp://wiki.jmol.org/index.php/Jmol_in_Pop-up.)
>> The command “draw pointgroup c3 1” nicely displays the C3 axis in this
>> molecule. If I then do “draw delete; draw pointgroup c3 1 scale 1.2”,
>> nothing changes. That is, the scale option does not seem to work.
>> Likewise, “draw delete; draw pointgroup Cs 1 scale 1.2” doesn’t scale a
>> mirror plane.
>> Also, “draw ID c3axis pointgroup c3 1” doesn't work, nor does “draw
>> color(blue) pointgroup c3 1”.
>> Have I uncovered a bug, or am I just misunderstanding the
>> documentation?
>> Thanks,
>> Chris
>>
>>
>>
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>
>
>
> --
> Robert M. Hanson
> Professor of Chemistry
> St. Olaf College
> 1520 St. Olaf Ave.
> Northfield, MN 55057
> http://www.stolaf.edu/people/hansonr
> phone: 507-786-3107
>
>
> If nature does not answer first what we want,
> it is better to take what answer we get.
>
> -- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
>
>
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--
Robert M. Hanson
Professor of Chemistry
St. Olaf College
1520 St. Olaf Ave.
Northfield, MN 55057
http://www.stolaf.edu/people/hansonr
phone: 507-786-3107
If nature does not answer first what we want,
it is better to take what answer we get.
-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900
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