Hello, thank you very much for the three fast answers. I think the "ping pong processing" looks interesting.
I only want to render a texture by RTT and in the next run I render the texture again, but I don't want to replace the old texture. I would like blend the new rendering into the texture. Is this understandable so far? Cheers Martin -------- Original-Nachricht -------- > Datum: Mon, 21 Feb 2011 17:07:41 +0200 > Von: "J.P. Delport" <[email protected]> > An: OpenSceneGraph Users <[email protected]> > Betreff: Re: [osg-users] Can I increment the gl_FragData? > Hi, > > you'll have to use "ping-pong" if you want to update a texture from a > current state. Have a look at the osggameoflife example. > > cheers > jp > > On 21/02/11 16:52, "Martin Großer" wrote: > > Hello, > > > > Have everyone experience with the gl shading language? I would like to > do something like that on my texture (I use render to texture): > > > > gl_FragData[0] += vec(0.01,0,0,1); > > > > Is that possible? I want to increment the color in my texture in every > render pass (in this case the red channel). I don't want to copy back to the > cpu memory. And I use the FRAME_BUFFER_OBJECT. I guess the gl_FragData[0] > is in every render pass zero (black). Is it possible to change that? > > > > Cheers > > > > Martin > > -- > This message is subject to the CSIR's copyright terms and conditions, > e-mail legal notice, and implemented Open Document Format (ODF) standard. > The full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html. > > This message has been scanned for viruses and dangerous content by > MailScanner, > and is believed to be clean. MailScanner thanks Transtec Computers for > their support. > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- GMX DSL Doppel-Flat ab 19,99 Euro/mtl.! Jetzt mit gratis Handy-Flat! http://portal.gmx.net/de/go/dsl _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
