FYI, never figured this one out, but I did find a workaround: hud_cam->setRenderOrder( osg::CameraNode::NESTED_RENDER ); hud_cam->getOrCreateStateSet()->setRenderBinDetails( 9999, "RenderBin" ); hud_cam->getOrCreateStateSet()->setAttribute( new osg::Depth( osg::Depth::ALWAYS ) );
Kind of a poor man's POST_RENDER :) -gw On 7/17/07, Robert Osfield <[EMAIL PROTECTED]> wrote: > > HI Glenn, > > As an experiment it might be just worth trying 2.0 as a lot of > improvements have been made in the way that Camera's are managed w.r.t > the front end and the back-end like RenderStage. > > Robert. > > On 7/17/07, Glenn Waldron <[EMAIL PROTECTED]> wrote: > > Robert, > > I neglected to mention that I am using osg::CameraNode under 1.2 at the > > moment, if that makes a difference. > > > > > > > FYI, each of these Camera will have its own RenderStage, the RTT one > > > will have is RenderStage as a pre draw of the main RenderStage, and > > > the HUD will have its own RenderStage, which is drawn at the end of > > > the RTT RenderStage. The exception is when you do NESTED_RENDER on > > > the HUD Camera, this will use the RTT RenderStage instread of its own. > > > > So to make sure I understand NESTED_RENDER -- after I quick peek at > > CullVisitor.cpp it looks like NESTED_RENDER will apply a new projection > > matrix and reference frame, but will ignore things like viewport, render > > order, target impl, etc. Is that correct? > > > > > Now... the question is why isn't this working... in what way are you > > > using the result form the RTT Camera? Are you rendering to an Image? > > > To a Texture that is used in the main frame? > > > > I am rendering to an Image using an FBO (as in osgprerender) in order to > > send video frames down a DirectShow pipeline. (I was also rendering the > > resulting texture to a single quad in the main scene with an ortho > camera, > > but if I remove this subgraph the issue remains.) > > > > > My guess is that there is some bug in RenderStage w.r.t handling of > > > post draw RenderStage. But then it could be something else, there is > > > a complex type of set up, without putting in debugging code and > > > stepping through it its hard to guess what is going on. > > > > > > Robert. > > > > Thanks, I will continue to poke at it and see if I can spot anything. > -gw > > > > > On 7/16/07, Glenn Waldron <[EMAIL PROTECTED] > wrote: > > > > Hi all, > > > > My brain's not working today so maybe you can help with this one. > > > > > > > > I have a scene with a HUD: > > > > > > > > scene -> HUD camera -> HUD geom > > > > > > > > The HUD camera is POST_RENDER, ABSOLUTE_RF, and works great. Now I > want > > to > > > > render this graph to a texture. So I have: > > > > > > > > RTT camera -> scene -> HUD camera -> HUD geom > > > > > > > > The RTT camera is PRE_RENDER. > > > > > > > > The scene renders to texture, but the HUD does not appear. Well of > > course > > > > not; it is POST_RENDER. So I tried PRE_RENDER with an adjusted > render > > > > number, but no luck. With NESTED_RENDER I do see the HUD, but alpha > > blending > > > > is wrong and it appears that the ortho projection matrix gets > mangled. > > > > > > > > What is the proper way to combine a HUD with RTT? Thanks much. -gw > > > > > > > > -- > > > > Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : > > 703-652-4791 > > > > _______________________________________________ > > > > osg-users mailing list > > > > [EMAIL PROTECTED] > > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > > http://www.openscenegraph.org/ > > > > > > > _______________________________________________ > > > osg-users mailing list > > > [EMAIL PROTECTED] > > > http://openscenegraph.net/mailman/listinfo/osg-users > > > http://www.openscenegraph.org/ > > > > > > > > > > > -- > > > > Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : > 703-652-4791 > > _______________________________________________ > > osg-users mailing list > > [EMAIL PROTECTED] > > http://openscenegraph.net/mailman/listinfo/osg-users > > http://www.openscenegraph.org/ > > > _______________________________________________ > osg-users mailing list > [EMAIL PROTECTED] > http://openscenegraph.net/mailman/listinfo/osg-users > http://www.openscenegraph.org/ > -- Glenn Waldron : Pelican Mapping : http://pelicanmapping.com : 703-652-4791
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