Robert, I guess that answers my question then. I was looking at osg::Effect as it seemed to have a lot in common with what I want to do, but you are right, its not really an appropriate use for it.
Thanks Rob. On Dec 20, 2007 9:24 AM, Robert Osfield <[EMAIL PROTECTED]> wrote: > Hi Rob, > > I don't see any reason why one would implement an osgFX::Effect using > RTT. The idea of osgFX is that you decorate the subgraph that you > want the effect on, this could be the whole scene, or just a single > object. > > Robert. > > On Dec 19, 2007 9:25 PM, Robert Hansford <[EMAIL PROTECTED]> wrote: > > Hi all, > > For one of the projects I'm working on I need to have several render > passes > > which operate on the rendered scene as a texture. I was wondering if I > > could base the implementations on the osgFX::Effect class. I know the > > existing effects are all based around simply using different statesets, > but > > would it be an inappropriate use of the Effect class to write Techniques > > which contain a render-to-texture camera and then operate on that > texture? > > > > A few examples of the sort of thing I'm doing are as follows: > > 1) blurring the image using a Gaussian kernel. > > 2) computing the min and max pixel value in the image in order to > > "downgrade" HDR imagery to get the expected effects when an unusually > bright > > object appears in the field of view. > > 3) adding noise to the image to simulate a poor quality camera. > > > > I am a little concerned that this may not be a proper use for the Effect > > class as this sort of process probably has to be done at the root of the > > scene graph, where as the existing effects can be applied to any > subgraph. > > However, I do like the idea of implementing these processes as nodes in > the > > graph that can be saved out to .osg files etc, but I can probably > achieve > > this by writing my own class rather than extending Effect (though that > would > > take me more time). > > > > I would greatly appreciate hearing people's thoughts on this matter. > > > > Thanks in advance, > > > > Rob. > > > > _______________________________________________ > > 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 >
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