FYI
I googled it up quickly and did not find anything. I tried however to use
GL_RGB16F_ARB
instead of GL_RGB32F_ARB and it worked. I don't need the extra precision so
that solves
my problem...
-bill
-Original Message-
From: [EMAIL PROTECTED] on behalf of Robert Osfield
Sent: Sat 2/23/2008 4:41 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Render to large float textures
Hi Bill,
I have never tried to allocate such a large FBO or associate
osg::Image so can't really say too much. osg::Image itself doesn't
really care how big dimensions you choose, it should in theory be able
to allocate as big as you need. The OpenGL side is governed by how
much the OpenGL driver hardware can support, up till the 8 series
NVidia were limited to 4096x4096 but in theory the new 8+ series
should be able to cope with 8192x8192 for textures, but I'm not sure
about FBO's you'll need to look this up.
Robert.
On Fri, Feb 22, 2008 at 9:41 PM, Poirier, Guillaume
[EMAIL PROTECTED] wrote:
Hello OSGers !
I am trying to render to a large float image of dimension 4368 X 2912.
I allocate an osg::Image of that size, GL_RGB, GL_FLOAT, and GL_RGB32F_ARB.
I attach that image to my camera COLOR_BUFFER.
Interestingly when I read back the image pixels 4096 in x wrap around.
Everything 4096 is fine. If I don't render to a float image but rather
an unsigned byte image I can render correctly my image 4096 in x...
I work under linux with a GeForce 8800 GTX, openGL 2.1.1, and driver
100.14.11.
Does anyone ever encountered such issue ?
Many thanks in advance,
- bill
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