[Osg-Submissions] [osg-submissions] 2D Array Textures (EXT_texture_array for osg)

[Art Tevs]

Hi Robert,

OK, thanks. 

P.S. As soon as you get the G80 you will love it ;-)))
 
--- Robert Osfield <robert.osfield at gmail.com> schrieb:

> Hi Art,
> 
> I don't yet have a 8800, so can't yet test any of
> the new extensions.
> I have an 8800GTS on order and when it arrives and I
> have a quiet
> spell I'll sit down review the extension docs and
> your submissions.
> Right now I can't test or know enough about the new
> extensions to
> attempt a review.
> 
> I might be a week or so before I can get this
> review.
> 
> Robert.
> 
> On 7/24/07, Art Tevs <stud_info2 at yahoo.de> wrote:
> > Hi folks, Hi Robert.
> >
> > Here is my submission for the osg. Description:
> >
> >
> ----------------------------------------------------
> >
> > A new texture class Texture2DArray derived from
> > Texture extends the osg to support the new
> > EXT_texture_array extensions. Texture arrays
> provides
> > a feature for people interesting in GPGPU
> programming.
> >
> >
> > Faetures and changes:
> >
> > - Full support for layered 2D textures.
> >
> > - New uniform types were added (sampler2DArray)
> >
> > - FrameBufferObject implementation were changed to
> > support attaching of 2D array textures to the
> > framebuffer
> >
> > - osgUtil/RenderState is changed to enable render
> to
> > texture mode for array textures.
> >
> > - StateSet was slightly changed to support texture
> > arrays. NOTE: array textures can not be used in
> fixed
> > function pipeline. Thus using the layered texture
> as a
> > statemode for a Drawable produce invalid enumerant
> > OpenGL errors.
> >
> > - Image class was extended to support handling of
> > array textures
> >
> > Tests:
> > I have used this class as a new feature of my
> > application. It works for me without problems
> (Note:
> > Texture arrays were introduced only for shading
> > languages and not for fixed function
> pipelines!!!).
> > RTT with Texture2DArray works, as I have tested
> them
> > as texture targets for a camera with 6
> layers/faces
> > (i.e. replacement for cube maps). I am using the
> array
> > textures in shader programming. Array textures can
> be
> > attached to the FBO and used as input and as
> output.
> >
> > Must be done:
> > - Restrict user to bind an Texture2DArray to any
> > "Geode" (i.e. by setting up StateSet), such that
> they
> > can not be used for fixed function pipeline.
> Probably
> > a warning should be ok, when user call
> > osg::StateSet::setTextureAttributeAndModes(0,
> > texture2Darray, osg::StateAttribute::ON); with
> > texture2Darray as an instance of Texture2DArray
> class.
> >
> >
> > Should be done:
> > - Adding of Texture1DArray class.
> > - Support for integer texture EXT_texture_integer
> >
> >
> >
> ----------------------------------------------------
> >
> > Since I am working on an Shader Model 4.0
> application,
> > I will probably make more contributions to the
> osg,
> > which implements the new extensions. I was not
> able to
> > find out, if some one already working on them :-(
> Next
> > one is the EXT_geometry_shader4 and
> EXT_gpu_shader4.
> >
> > Thanks.
> >
> > Cheers, Art
> >
> > P.S. Please let me know if you add this
> contribution
> > to the svn or not. This would be very helpfull for
> > future developments.
> >
> >
> >       __________________________________  Alles
> was der Gesundheit und Entspannung dient. BE A
> BETTER MEDIZINMANN! www.yahoo.de/clever
> > _______________________________________________
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> >
>
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> >
> >
> >
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