[osg-users] Addition and Subtraction

[Robert Osfield]

On 9/16/07, Renan Mendes <renanmzmendes at gmail.com> wrote:
> Oh, that's a shame. Thanks anyway...
>
> But how would you do that? Is there any OpenGL primitive appropriate for
> this kind of rendering? Anywhere I can read about it?

There is no OpenGL primitive to support what you are after.

The closest you could get would be to use the stencil buffer and
multi-pass.  Look up constructive solid modeling on the web.

Robert.