Good morning,
I did some RTT research some weeks ago and found an interesting problem:
Running the pre-render OSG example with osg::Camera::RenderTargetImplementation
set to osg::Camera::FRAME_BUFFER results in a nice 60 fps on my hardware.
Running the pre-render OSG example with osg::Camera::RenderTargetImplementation
set to osg::Camera::FRAME_BUFFER_OBJECT results in a not so nice 30 fps on my
hardware.
Please note that the only difference in the two runs is the FRAME_BUFFER vs
FRAME_BUFFER_OBJECT setting.
My own RTT application suffer from the exact same problem (complexity of my
scene has no impact on this problem).
I am at some point in time, going to test this problem with different kinds of
hardware and drivers, just to see if this is a driver/hardware problem. Robert
told me he had seen no such loss in framerate on Mac and Unix. I am running
Windows.
I have seen a very similar problem when working on Direct-X earlier, so I
believe this is a driver or hardware issue, but I do not know for sure yet.
Regards,
Viggo
> Date: Sun, 7 Sep 2008 09:27:03 +0200> From: [EMAIL PROTECTED]> To:
> [email protected]> Subject: Re: [osg-users] performance
> issues with RTT> > Good morning,> > I'm just rendering to texture, no images
> or pixel reading involved.> > Regards,> Steffen>
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