Hi Chris, On Fri, Feb 27, 2009 at 8:26 PM, Chris Glasnapp <[email protected]> wrote: > I guess the only reason I ask is that it seems like CullVisitor is doing > extra work with rtts if the camera render order != NESTED_RENDER, although > I'm not quite sure exactly how that code works, so it may be very > lightweight. The earliest revision in svn of Camera.cpp has the default > render order as POST_RENDER. Just trying to understand! : )
POST_RENDER is bit more work for the cull and draw traversal to do, but.. it provides a very distinct set of features/uses/implementation than a NESTED_RENDER, just as as a PRE_RENDER has its own set of users/implementation details. For in scene graph Camera's the POST_RENDER is typically used for effects like HUD's. PRE_RENDER is typically used for render to texture effects. NESTED_RENDER is used for when the project and view matrix need to be overriden, but there isn't any need to clear the colour/depth buffer. Camera's are also used at the Viewer level, rather than in scene graph, these high level Camera's also share lots of capabilities of in scene graph cameras, but also have their own specific attributes/users. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
