Re: [PyMOL] Possible lighting bug

[Jason V. <jas...@sc...>]

Hi Stephen,

Does

set two_sided_lighting, on

help?

Can you please send me a small script that reproduces the effect?

I just tried your simple lineSet example (with fixes shown below) and
everything worked fine:

python
from pymol.cgo import *
from pymol import cmd
lineSet = [ LINEWIDTH, 0.30, \
           BEGIN, LINES, \
           VERTEX, 0.0, 0.0, 0.0, \
           VERTEX, 1.0, 1.0, 1.0, END, ]
cmd.load_cgo( lineSet, 'lineSet' )
python end

Cheers,

-- Jason

On Thu, Oct 27, 2011 at 1:36 PM, Stephen J. Bush <mup...@gm...> wrote:
> I have a problem with lighting (I think) CGO lines, e.g.,
>
>> lineSet = [
>>    LINEWIDTH, 0.30,
>>    BEGIN, LINES,
>>    VECTOR, 0.0, 0.0, 0.0,
>>    VECTOR, 1.0, 1.0, 1.0,
>>    END,
>>    ]
>> cmd.load_cgo( lineSet, 'LineSet' )
>
>
> For some reason, lines appear crisp from one angle, and strangely distorted
> from another angle (it's about 180deg for both -- think dark vs. light side
> of the moon: there is a crossover point). Here are links to two screen shots
> that show the problem:
>
> http://dl.dropbox.com/u/1209050/Screenshot-1.png
> http://dl.dropbox.com/u/1209050/Screenshot-2.png
>
> I have tried respositioning the lights (in the screenshot they're at the 6
> faces of the box, marked by blue balls), but it doesn't change the viewing
> angle at all, only the shade of the lines. I have tried messing with the
> specular and spec_direct settings, but that only caused the lines to
> disappear completely (or rather, turn completely white). I also tried
> changing the ambiance settings, but that only changed the hue of the lines.
>
> I would really appreciate some help if anyone knows how to fix this. Thanks!
>
> Oh, and for reference, here's my system information:
>
>> This Executable Build integrates and extends Open-Source PyMOL 1.3.
>>  OpenGL graphics engine:
>>   GL_VENDOR: NVIDIA Corporation
>>   GL_RENDERER: GeForce 9500 GT/PCI/SSE2
>>   GL_VERSION: 3.2.0 NVIDIA 195.36.24
>>  Detected 8 CPU cores.  Enabled multithreaded rendering.
>
>
> I recently went pack to 1.3 as I was getting __very__ slow load times with
> 1.4.
>
> Cheers,
> Stephen
>
> ---------------------------------
> Stephen J. Bush
> sj...@un...
>
> PhD. Candidate | Bioinformatics & Computational Biology
> Tropsha Lab |  UNC Chapel Hill
>
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-- 
Jason Vertrees, PhD
PyMOL Product Manager
Schrodinger, LLC

(e) Jas...@sc...
(o) +1 (603) 374-7120