Re: [Gnu3dkit-dev] OGL 2.0 shading

[Philippe C . D . Robert]

On Friday, January 31, 2003, at 09:59  Uhr, Gerard Iglesias wrote:
> > > But it would be better to me to separate the view functionalities to 
> > > the frustum ones.
> >
> > What do you mean exactly here? Should we again provide a separate 
> > G3DFrustum object as in 0.3.x? I removed this separation because it 
> > did IMHO not add value to the design but cause communication overhead 
> > during rendering (when view-frustum culling).
>
> The overhead is so critical, What I think about that, is the 
> capability for the controller to change the viewing setting from a 
> predefined set, and I don't see other things than an object or a C 
> struct (if the overhead is critical)

The frustum itself will be a struct called G3DFrustum (see G3DTypes.h) 
which will be stored by the camera's context. It might then be possible 
to switch quickly between different camera contexts - if this is what 
you mean.

> On an other subject, did you see that NVidia is porting Cg to MacOSX 
> (I read a post on the mac-opengl maillist)

Yes, but while I agree that Cg is nice I don't like several aspects of 
it. Then I'd rather choose the OpenGL 2.0 shader language instead.

I have spent some time now diving into RenderMan Interface and I really 
think this is the way to go. The OpenGL renderer implementation can 
then still be based on Cg or whatever.

-Phil
--
Philippe C.D. Robert
http://www.nice.ch/~phip