That's right. There isn't a way to draw from a fixed point on the screen to
an atom. You might try a recent addition in relation to PyMOL. This is a
much more general offset method that is used in PyMOL and I needed to
implement in Jmol, so we have it as well now.
Do give this a try and let me know if it solves your problem:
new feature: PyMOL-like label offset options:
set labelOffset [sx, sy, sz]
set labelOffset [mode, sx, sy, sz, ax, ay, az]
where
sx,sy,sz are screen coord offsets
-- in Angstroms
-- applied after view rotation
-- sy > 0 LOWERS label
ax,ay,az are xyz position (in Angstroms; applied before view rotation)
mode == 1 indicates xyz position is an offset to the atom position
mode != 1 indicates xyz position is absolute
defaults: mode == 1; ax = ay = az = 0
Note that those sx sy sz are not in pixels, they are in angstroms. Also, I
note that there is a bug that disallows label pointers with this sort of
offset. Hmm....
On Sat, Jun 29, 2013 at 1:50 PM, James <[email protected]> wrote:
> Thanks Angel. I see that echo has almost everything. But, the reason I was
> trying to use labels is because they can have a line to an atom. After
> reviewing "draw ARROW" in the hopes that it could substitute for that line,
> I don't see that it is possible to draw from a 2D point (e.g., top left) to
> a 3D point (an atom). I tried assigning echo an ID and drawing from that to
> an atom, but (as I suspected - just hoping I could trick it) since echo
> isn't a draw object it doesn't work. I can't find a way to bridge that
> 2D/3D coordinate issue, which label does automatically.
>
> Thanks,
> James
>
>
> On Saturday, June 29, 2013, Angel Herráez wrote:
>
>> Hello, James
>>
>> By definition, labels are attached to atoms. That is why the distance
>> cannot
>> be long.
>> >From your description, I don't think that labels are what you need. You
>> have
>> "echo" for positioning text either in 2D screen space or in 3D molecular
>> coordinates, at arbitrary positions and with chosen alignment, even
>> multi-line.
>>
>> e.g.
>>
>> set echo myEcho1 0 50%; echo Hello;
>> // windowLeft+windowMiddle, left flushed
>> set echo myEcho2 0 100%; echo Good Bye;
>> // windowLeft+windowTop, left flushed
>> set echo myEcho3 15% 85%; set echo center; echo Another;
>> // close to windowLeft+windowTop, center-justified
>> // note that text will never go out of screen, it will flush to the edge
>> if needed
>>
>> set echo myEcho4 0 100%; echo First Line;
>> set echo myEcho5 0 100%; echo "|Second Line"; //no overlap due to the
>> initial newline (|)
>>
>>
>>
>>
>>
>>
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>
>
> --
> Sincerely,
> James Ryley, PhD, Patent Agent
> SumoBrain: Intellectual Property Solutions & Data
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--
Robert M. Hanson
Larson-Anderson Professor of Chemistry
St. Olaf College
Northfield, MN
http://www.stolaf.edu/people/hansonr
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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