[osg-users] Displaying cables

[Jean-Sébastien Guay]

Hi Mike,

Thanks for the pointer about the GPU pipeline, I'll check it out.

> So you're drawing 6x as many quads as necessary; that's seems a good rationale to learn geometry shaders! :-)  That and moving texcoord generation off the CPU and into the vertex shader.

I'm pretty anxious to try them out myself, but in this case, I don't 
think it would make that much difference. Sure, in percentage terms 6x 
more is a lot, but in absolute terms it's still not very much (20 cables 
with 20 segments of 6 quads each - 2400 quads... and even in terms of 
vertices it's not that many...), so I guess I'm doing something wrong. 
It's not the first time someone's displayed cables, and using geometry 
shaders was not an option until recently, so there's obviously something 
amiss.

J-S

-- 
______________________________________________________
Jean-Sebastien Guay    jean-sebastien.guay at cm-labs.com
                               http://www.cm-labs.com/
                        http://whitestar02.webhop.org/