[osg-submissions] RenderStage - Stencil Buffer is missing (patch)

[Art Tevs]

Hi Robert,

> 
> I'm afraid you've misread the code, the stencil
> buffer is supported,
> but if one isn't requested then there is no need to
> add one.  So the
> code you have added is not necessary at all.
> 
Ok, I see. If it is not needed, then let it be. If
somebody requires it, he should provide a patch.

> One may also question on whether newer drivers
> actually require both
> of the a colour buffer and depth buffer, and this is
> what the fallback
> statements for the depth and colour buffers do - its
> these that you
> have copied.  After 2.4 we can look into relaxing
> the fallbacks for
> depth and colour but so close to a release I'm not
> prepared to go
> experimenting with potentially breaking changes.
> 

I am afraid, I didn't understood, what you mean with
fallback to depth and color buffer. I am succesfully
using depth and color attachment on the camera in one
pass, hence the camera do render the scene into the
color buffer and depth buffer at the same time. This
doesn't produce any errors. Hence I am not sure, what
you mean with relaxaing the fallbacks for depth and
color.


Best regards,
Art

> Robert.
> 
> On Thu, Apr 24, 2008 at 11:42 PM, Art Tevs
> <stud_info2 at yahoo.de> wrote:
> > Hi Robert,
> >
> >  just before the v2.4, there is one line missing
> in the
> >  current RenderStage.cpp.
> >
> >  In the method runCameraSetup the setup for
> stencil
> >  buffer is missing. You can see that between the
> lines
> >  350-359 the stencil attachmetn is missing. I have
> >  attached a patched file. Take a look. I haven't
> tested
> >  stencil attachment at all, hence I can not be
> sure if
> >  there is anything missing.
> >
> >  Even more, there are some extensions around,
> which
> >  enables depth buffer and stencil to be attached
> into
> >  one RenderBuffer, something like
> GL_DEPTH_STENCIL_EXT
> >  or  GL_DEPTH24_STENCIL8_EXT. I think if we
> provide the
> >  stencil attachmetn support, then we have to think
> on
> >  this extensions too. It would be nice if somebody
> >  could test stencil implementation as it is and
> provide
> >  a patch which includes all this functionality.
> >
> >
> >  Best regards,
> >  Art
> >
> >
> >
> >
> >
> >      
>
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