Hello,

I have the answer of the question what is different.

Frame Buffer Object is render to texture. So the texture use the frame buffer 
and you render on it directly.

Copy to texture means that the frame buffer is copy to the texture buffer after 
the rendering.

I hope this is true. And if I copy it after the rendering I get the 
antialiasing and anagyphic features.

Another question. What is better? Is the copy too slow with a texture 
resolution of 1400x1050?

Thanks

Martin


-------- Original-Nachricht --------
> Datum: Tue, 19 Apr 2011 16:30:19 +0200
> Von: "Martin Großer" <[email protected]>
> An: [email protected]
> Betreff: [osg-users] glCopyTexImage2D or Frame Buffer Object

> Hello,
> 
> Few month ago, I got an application, which realized a "render to texture"
> with glCopyTexImage2D(GL_TEXTURE_2D,0,...) and the antialiasing and the
> anaglyphic works well. Today I tried the render-to-texture with the frame
> buffer object as render target for the osg::Camera and in this case the
> antialiasing doesn't work. Also the anaglyphic view doesn't work.
> 
> Why did antialiasing and anaglyphic work with glCopyTexImage2D?
> 
> I have read that the frame buffer object doesn't support antialiasing, is
> it true?
> 
> Thanks
> 
> Martin
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