[osg-users] HDR 32bit

Benoit bossavit bnuaster at gmail.com
Mon Sep 24 05:58:56 PDT 2007


I'm using a GeForce 6800, and I used a linear interpolation.. but I have
tried with a nearest interpolation and the result is the same :s

2007/9/24, OSG at dvp.co.il <osg at dvp.co.il>:
>
>  I experienced similar result when I read the float data from the texture
> using 32 bit, but only rendering to 32 bit shouldn't decrease the FR that
> much. What card do u use and what interpolation do u set for the texture? (I
> think u must use NEAREST with GL_RGBA32F_ARB).
>
> ----- Original Message -----
> *From:* Benoit bossavit <bnuaster at gmail.com>
> *To:* OpenSceneGraph Users <osg-users at lists.openscenegraph.org>
> *Sent:* Monday, September 24, 2007 2:25 PM
> *Subject:* [osg-users] HDR 32bit
>
> Hi all,
> I'm trying HDRR. My application (osg v1.2) turn in real time (>60fps)
> using FBO with texture 16bits (GL_RGBA16F_ARB), but when I try with FBO
> 32bits(GL_RGBA32F_ARB) my frame rate is null. Is it normal loosing almost
> all performances? :s
> There is a minimal hardware configuration to do HDR32? There is something
> to do more than change the internal format of texture attached with FBO?
> If someone have an answer :)
>
> Thanks you
>
> bnua
>
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