I agree, but what I need in the shader is the modelViewMatrix from the previous frame. (By the way, it's for creating motion blur.) What would be the best way to accomplish this? Asa
-----Ursprungligt meddelande----- Från: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] För Robert Osfield Skickat: den 2 december 2008 14:51 Till: OpenSceneGraph Users Ämne: Re: [osg-users] Problem updating uniforms Hi Asa, I was strongly recommend trying to use compute what you need from variables already available to your in the shader, do a per drawable binding of an uniform would awkward to implement and provide poor performance. Please note that you have gl_ModeViewMatrix and osg_ViewMatrix available in shaders as well a range of other variables. Robert. On Tue, Dec 2, 2008 at 1:47 PM, Engvall Åsa <[EMAIL PROTECTED]> wrote: > Hi osg-users! > > I have a shader attached to a subgraph. The shader uses a uniform > which needs to be updated in every frame. The uniform is related to > the modelviewmatrix, and should thus get a different value for every > node in the subgraph. > > I have tried to use a osg::Uniform::Callback, but the callback is only > called for the parent node in the subgraph. > I think it would work if I declare a uniform for each node, and attach > an updating callback to each uniform, but there must be a more clever > way do to it? > > Any help would be appreciated! > Regards, > > Åsa Engvall > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
