Hi Ian,
As this may be of broader interest, I forward it to the pymol user list too.
You can clip the scene using an intersection. Let's say that you have
the object you want to clip stored as a povray include file
"object.inc". Then you can get the clipped object as:
//###
pymol_object = union { #include "object.inc" }
clip = ...; // Here you need to fill in the 16th number from
get_view(), giving the distance of the front clipping plane
intersection { object { pymol_object } plane { z, -clip } }
//###
The plane could also be defined as plane{z,0 translate -clip} or,
along the same lines, as plane{z,0 rotate 30*y translate-clip}. Like
that you can have the clipping plane rotated.
Do note that such intersections are often very slow. Especially with
meshes (like surfaces) it is likely to be a pain (but potentially
yielding great imagery :)). With many separate objects, spheres in
particular, you can clip each of them separately, which is much
faster, especially if you use the directives 'bounded_by' and
'clipped_by'. For a sphere defined as
sphere{<0,0,0>, 1 pigment{color rgb 1}}
this means that you convert it to
intersection{
sphere{<0,0,0>, 1}
object{IntersectionObject}
pigment{color rgb 1}
bounded_by { sphere{<0,0,0>, 1} }
}
I would suggest scripting this... :)
Hope it helps, and good luck!
Cheers,
Tsjerk
On Thu, Mar 24, 2011 at 8:31 PM, Ian Slaymaker <[email protected]> wrote:
> Dear Tsjerk,
> I apologize for the elementary nature of my question, but I have spent quite
> some time wrestling with my rendering issues, and after solving most of
> them, a very small issue is blocking my progress. How do you get PovRay to
> read in the clipping plan of a pymol scene? I have tried a number of things,
> and nothing seems to work. Any help would be greatly appreciated. Thank you.
>
> Best,
> Ian
>
--
Tsjerk A. Wassenaar, Ph.D.
post-doctoral researcher
Molecular Dynamics Group
* Groningen Institute for Biomolecular Research and Biotechnology
* Zernike Institute for Advanced Materials
University of Groningen
The Netherlands
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