Re: [Mesa3d-dev] GLU fun

[Brian P. <br...@va...>]

Michael Vance wrote:
> 
> Looking for a little commentary.
> 
> Tribes 2 uses two GLU functions: gluProject and gluUnProject. Normally
> an app would just link dynamically against libGLU and be done with it,
> However, in the world of binary applications and entertainment
> oriented end-users, this is a dangerous proposition. Especially with
> the proliferation of the NVIDIA drivers, which don't ship a GLU.
> 
> My ideas:
> 
> 1) link dynamically and ship a Mesa GLU in the current directory, with
> associated LD_LIBRARY_PATH mojo. Unfortunately, we use a dlopen()
> style pointer mechanism, so GL is never explicitly linked. The
> run-time linker will probably still work because a libGL *is* loaded,
> through dlopen, but it still makes me nervous.
> 
> 2) Ask permission to include the two functions verbatim into the
> Tribes 2 source tree. I did this with gluBuild2DMipMaps with Brian's
> blessing for Heavy Gear 2. Obviously the LGPL usually doesn't allow
> this w/o object files, etc. Unfortunately, it looks like a Frenchman
> of some sort wrote the project/unproject code in Mesa, and I don't
> know if Brian has copyright assignment.

You're welcome to just use those functions.  Anyone familiar with
transformations could derive them in a couple hours.  If you wrote
them from scratch you'd probably wind up with nearly identical code
anyway.


> 3) See if the SGI OSS B license would allow me to do (2) with its
> code. Unfortunately IANAL and can't tell exactly what the license lets
> me do.

I don't think that would be a problem either.

-Brian