* Tsjerk Wassenaar <t.a.wassen...@chem.rug.nl> [2004-02-19 04:30] wrote:
>
> Hi Guys,
>
> I seem to have some trouble rendering with povray. The render starts and
> finishes fine, and the image is created, but Pymol crashes with a
> segmentation fault as soon as the rendering is done. The image is not
> loaded to the viewer. I'm using povray 3.5 with Pymol 0.93 on a laptop
> (Intel Centrino) with SuSe 9.0. I have changed povray_exe in povray.py
> in modules to "povray".
I never use the povray rendering directly from within PyMOL. I find the
PyMOL ray-tracer is great for most things and if it isn't sufficient, I
want to be able to edit the povray input as you suggest below.
> Any hints?
Yes!
> Than to Warren probably, it would be great if Pymol would be able to
> write a povray object (include file) from a given selection. That would
> combine the strong points of pymol where it comes to showing the thing
> as you want it, with those of Povray, where it comes to lighting,
> positioning, colouring, textures and so on. Since Pymol is already
> capable of producing povray input it wouldn't be very hard I would guess?
It can do this. I use a simple little script that I call make_pov.py:
######################################
# make_pov.py
from pymol import cmd
def make_pov(file):
(header,data) = cmd.get_povray()
povfile=open(file,'w')
povfile.write(header)
povfile.write(data)
povfile.close()
######################################
Load the file with 'run make_pov.py' and then within pymol do:
make_pov('povray.input')
Then outside PyMOL feed this file to povray with whatever command-line
options you need. You do need to look at the size of the image reported
by the make_pov. It looks something like:
PyMOL>make_pov('povray.input')
RayRenderPOV: w 1100 h 900 f 63.349 b 102.310
RayRenderPOV: vol -17.316 17.316 -14.168
RayRenderPOV: vol 14.168 63.349 102.310
RayRenderPovRay: processed 714 graphics primitives.
Ray: total time: 0.03 sec. = 123885.9 frames/hour. (0.03 sec. accum.)
You'll need to use the same width and height (or the same ratio) to
make your povray output have the correct width to height ratio, e.g.:
povray +Ipovray.input +W550 +H450
Cheers,
Rob
--
Robert L. Campbell, Ph.D. <r...@post.queensu.ca>
Senior Research Associate phone: 613-533-6821
Dept. of Biochemistry, Queen's University, fax: 613-533-2497
Kingston, ON K7L 3N6 Canada http://adelie.biochem.queensu.ca/~rlc
PGP Fingerprint: 9B49 3D3F A489 05DC B35C 8E33 F238 A8F5 F635 C0E2
