Yep, I agree. The more I look at this the more I think it's a driver issue. I also found that a little window size increase can cause FSAA to turn off. Then more size increasing causes the freakish slowness. Google isn't helping me with this one, so I guess I'll send it to NVidia but emails to graphics vendors usually vanish into the ether :( - Terry
Message: 11 Date: Fri, 27 Oct 2006 09:25:10 +0100 From: "Robert Osfield" <[EMAIL PROTECTED]> Subject: Re: [osg-users] Freakish slowness and GL_CLAMP after resizing To: "osg users" <[email protected]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Hi Terry, I haven't heard of problems like this before. The OSG itself doesn't change other than having different viewport sizes when resizing so I wouldn't expect problems on the OSG side. My best guess would be an OpenGL driver bug, especially w.r.t the texture clamping. Slow down possibly could be caused by memory limitations on the GPU causing geometry and textures being displaced by a large frame buffer. However, a frame buffer change in size shouldn't cause that much of a memory displacement., so again it sounds like an OpenGL driver issue. What drivers are you working with? Robert. On 10/26/06, Terry Welsh <[EMAIL PROTECTED]> wrote: > Sorry if this it off-topic, since I believe it's an NVidia driver > issue, but I thought I would ask here since I've only experienced it > running OSG apps on NVidia. > > When running large terrain databases with gobs of geometry and > texture, I sometimes resize the window. Occasionally, when resizing > from small to larger, my framerate drops way down around 1Hz and all > my textures appear to be getting drawn with GL_CLAMP instead of > GL_CLAMP_TO_EDGE or GL_REPEAT. It looks like this because I start to > see the black border pixel color being pulled in. > > Has anyone else had this problem or know anything about it? > -- > Terry Welsh - mogumbo 'at' gmail.com > www.reallyslick.com | www.mogumbo.com
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