Re: [grt-talk] Some suggestions.

[Anton N. Mescheryakov]

Nikodemus Siivola wrote:

> > 2. CSG stuff is really good indeed, besides one severe limitation: it's
> > two-way only. I think that it may be resolved in conjuntion with more
> > robust occlusion/visibliliy testing.
> >    
>
> ??? I'm sorry, but I don't understand. Can you please explain. Also, the
> CSG is still immature.
>  
Currently, CSG seems to accept just two objects as its arguments while 
there isn't anything wrong in union/intersecton/difference of >2 
objects. Of course, there is some optimization tradeof: if object A 
intersects B, A intersects C but B and C doesn't intersect, testing of 
B-C intersection in futile. But it's up to octrees, IMO.

Speaking on octrees. When casting rays, vast majority of them simply 
miss and just take your time away. So why don't render the scene with 
some _very_ simple scanline algorythm (no shading at all) and don't cast 
initial rays for scene fragments there scanline didn't find anything? 
BTW, I hardly can find much of differences between the 1st generation of 
rays and Z-buffer methods...

Just some ideas,
   Anton N. Mescheryakov.