[PyOpenGL-Users] Preliminary gl2ps wrapper for PyOpenGL

[Mike C. F. <mcf...@ro...>]

I've just built (and done some minimal testing of) a gl2ps wrapper for 
use with PyOpenGL.  Haven't tested anything save the two primary entry 
points, but they seem to work properly.  As a note, the mechanism works 
using view-space absolute coordinates w/out the benefit of the depth 
buffer, so if your background-drawing code plays tricks such as clearing 
the depth buffer after drawing (which OpenGLContext does), you can wind 
up with your scene behind the background's geometry.

Anyway, if people are interested enough, I'll post the source 
somewhere.  The wrapper script is basically just a slightly trimmed 
version of the gl2ps.h header with some minimal type-mapping.  I wound 
up renaming the gl2ps.c file to _gl2ps.c to get around an annoying error 
where the build system was creating two gl2ps.o files.  Other than that 
no noticable changes to the base package that I can recall.  Oh, and at 
the moment you need to define WIN32  explicitly to build.  Haven't 
figured out why that's necessary as of yet.

Here's the results from a simple VRML file (one normally intended to be 
drawn w/out textures):
    http://members.rogers.com/mcfletch/programming/test.eps

Anyway, if anyone's interested, I'll look at polishing/finishing the 
wrapper and releasing it.

Enjoy all,
Mike

Mike C. Fletcher wrote:
...

> Similar-looking C lib for the same purpose (also LGPL):
>
>    http://www.geuz.org/gl2ps/
>
> apparently had a Python wrapper at some point in time, though it 
> doesn't appear to be available any more (Toby?)  All in all this looks 
> like the most mature of the solutions (for instance it appears able to 
> deal with intersection polygons, though if I'm reading right it may 
> generate striated results for smooth-shaded polygons.

...

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/