[osg-users] About Interleaved Array Support

[Robert Osfield]

On Wed, 10 Oct 2018 at 12:40, Julien Valentin
<julienvalentin51 at gmail.com> wrote:
> AFAIK Memory alignement compliance yield in greater performance..No?

On some GPU architectures it might do, others it will be little or no
difference.

One must always benchmark with proper scenes and across a range of
platforms to know whether it's worthwhile.

When judging the balance of cost vs benefit you have to consider the
whole usage chain - how do you get data in and out, how do you process
it.  With an InterleavedGeometry implementation you are limited to
just applications that explicitly create and can process
InterleavedGeometry.

With features like this you also need to consider the support burden,
but maintaining it and helping users learn how to use it properly and
what happens when it's not compatible with the existing functionality
that assumes osg::Geometry.

For the OSG I'm focused on maintainability and streamlining support,
not inviting lots of new features and support associated with it.  For
bleeding edge features I'm focused on the VSG - here we have greater
freedom of introducing new ways of doing things as there isn't
compatibility and big code base and community to worry about.

Robert.