Re: [osg-users] osgFX effects frame lag during render
Hi Robert, Thanks for the explanation. I don't have time to spend on that during the next weeks/months but maybe one day... Thanks. Regards, Vincent. Robert Osfield a écrit : HI Vincent, The frame lag is an unfortunate side effect to the way that osgFX doesn't know how to render itself until it's queried the OpenGL extensions/versions available. osgFX is rather old now and code do with a revamp that addresses this issues, but would need a form of up front extension checking that requires a valid graphics context, so it rather pushes the current decoupled design where the scene graph doesn't get involved with construction of contexts. Feel free to dive in and come up with a proposal. Robert. On Wed, Feb 10, 2010 at 3:07 PM, Vincent Bourdier wrote: Hi all, This a very strange and unexpected bug : Applying an osgFX::Scribe effect on a node, we can see a lag in the render : If you get each frame a screenshot you can see : *Frame #1* Action : no action Render : normal render of the node *Frame #2* Action : adding a osgFX::Scribe node as parent of the node to apply the effect (done in a callback on root node) Render : no node ! * Frame #3* Action : no action Render : node with applied effect. So during one frame, the node is not rendered at all... This is very embarrassing if you take a screenshot automatically in post-render of the frame where you apply the effect... Thanks for your help. Regards, Vincent __ Information from ESET NOD32 Antivirus, version of virus signature database 4854 (20100210) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org __ Information from ESET NOD32 Antivirus, version of virus signature database 4854 (20100210) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgFX effects frame lag during render
HI Vincent, The frame lag is an unfortunate side effect to the way that osgFX doesn't know how to render itself until it's queried the OpenGL extensions/versions available. osgFX is rather old now and code do with a revamp that addresses this issues, but would need a form of up front extension checking that requires a valid graphics context, so it rather pushes the current decoupled design where the scene graph doesn't get involved with construction of contexts. Feel free to dive in and come up with a proposal. Robert. On Wed, Feb 10, 2010 at 3:07 PM, Vincent Bourdier wrote: > Hi all, > > This a very strange and unexpected bug : > > Applying an osgFX::Scribe effect on a node, we can see a lag in the render : > If you get each frame a screenshot you can see : > > *Frame #1* > Action : no action > Render : normal render of the node > > *Frame #2* > Action : adding a osgFX::Scribe node as parent of the node to apply the > effect (done in a callback on root node) > Render : no node ! > * > Frame #3* > Action : no action > Render : node with applied effect. > > > So during one frame, the node is not rendered at all... This is very > embarrassing if you take a screenshot automatically in post-render of the > frame where > you apply the effect... > > > Thanks for your help. > > Regards, > Vincent > > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 4854 (20100210) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgFX effects frame lag during render
Hi all, This a very strange and unexpected bug : Applying an osgFX::Scribe effect on a node, we can see a lag in the render : If you get each frame a screenshot you can see : *Frame #1* Action : no action Render : normal render of the node *Frame #2* Action : adding a osgFX::Scribe node as parent of the node to apply the effect (done in a callback on root node) Render : no node ! * Frame #3* Action : no action Render : node with applied effect. So during one frame, the node is not rendered at all... This is very embarrassing if you take a screenshot automatically in post-render of the frame where you apply the effect... Thanks for your help. Regards, Vincent __ Information from ESET NOD32 Antivirus, version of virus signature database 4854 (20100210) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
