Hi, also have a look at this thread:
http://article.gmane.org/gmane.comp.graphics.openscenegraph.user/26257/match=runcamerasetup If you want to change the attachments after camera is created, you must somehow force runcamerasetup to be called. This might be slow. I still think that a shader might be the best solution. You attach your 2 textures as both input and output (using multiple render targets). Then between frames you just switch the values of the uniforms pointing to the right input and output. e.g. --8<-- shader: uniform input_tex; uniform output_tex; read from input using sampler do stuff write to output using glFragData[output_tex] --8<-- cpp code: frame 0: set input uniform to 0, output to 1 frame 1: set input uniform to 1, output to 0 ... hope this helps regards jp Roman Grigoriev wrote: > Thanx for your reply but I need to explain what I want.<неиI've seen > stereomatch but I need to implement another thing.<неиI try to explain. So I > try to make clouds rendering on GPU using cellular automata.<неиSo initial > states are in texture1 and using FBO, attached to texture2 and pixel shader, > I calculate states and write it to FBO texture2.<неиSo now for this steps > initial steps are in texture2 and here is the main question how can I > "disapply" texture2 from FBO and apply to texture1.<неиIn OSGPPU it was made > by copying to additional texture so there is no any discomfort to > programmer. But this trick need to use additional pass <неиIn my case > copying 2048*2048 textures can take very long time. so I need dynamically > change FBO - tex1,nextframe-tex2,nextframe-tex1,nextframe-tex2.<неиThe main > problem that FBO statically applying when you create camera and in current > OSG you can't dynamically change FBO attachment.<неиSo I'm newbie in OSG so > if some explanations with code are welcome.<неиThanx in advance<неиBye<неи > <неи<неи-----Original Message-----<неиFrom: > [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of J.P. > Delport<неиSent: Wednesday, April 30, 2008 10:49 AM<неиTo: OpenSceneGraph > Users<неиSubject: Re: [osg-users] Ping-pong rendering<неи<неиHi,<неи<неиyou > could have a look at the osgstereomatch example, see also the <неиreadme. > I'm not sure what you mean by the "dynamic", but the example <неиuses > ping-pong using a shader parameter.<неи<неиjp<неи<неиRoman Grigoriev > wrote:<неи> Hi guys!<неи> <неи> Could you please advise me how to make > dynamic ping pong rendering using <неи> osg2.4<неи> <неи> I tried but it > doesn't work.<неи> <неи> tex1 and tex2 - textures for rendering.<неи> <неи> > So I need in even frames:<неи> <неи> > Camera->setRenderTargetImplementation(osg::Camera::FrameBufferObject);<неи> > <неи> Camera->attach(osg::Camera::COLOR_BUFFER,tex1)<неи> <неи> > Camerastateset->setTextureAttributeAndModes(0,tex2,osg::StateAttribute::ON); > <неи> <неи> In odd frames:<неи> <неи> > Camera->setRenderTargetImplementation(osg::Camera::FrameBufferObject);<неи> > <неи> Camera->attach(osg::Camera::COLOR_BUFFER,tex2)<неи> <неи> > Camerastateset->setTextureAttributeAndModes(0,tex1,osg::StateAttribute::ON); > <неи> <неи> Thanx in advance<неи> <неи> <неи> <неи> <неи> <неи> <неи> > ------------------------------------------------------------------------<неи >> <неи> _______________________________________________<неи> osg-users > mailing list<неи> osg-users@lists.openscenegraph.org<неи> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org<не > и<неи-- <неиThis message is subject to the CSIR's copyright terms and > conditions, e-mail legal notice, and implemented Open Document Format (ODF) > standard. <неиThe full disclaimer details can be found at > http://www.csir.co.za/disclaimer.html.<неи<неиThis message has been scanned > for viruses and dangerous content by MailScanner, <неиand is believed to be > clean. MailScanner thanks Transtec Computers for their > support.<неи<неи_______________________________________________<неиosg-users > mailing > list<[EMAIL PROTECTED]<неиhttp://lists.openscenegraph.or > g/listinfo.cgi/osg-users-openscenegraph.org<неи > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- 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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
