My app already spends a lot of time in update() so I'd prefer to avoid any solution that slows performance any more. I suspect most developers will be using osgAnimation for imported 3D models, so as long as importers meet the bones-first requirement I doubt you'll get any complaints. The FBX importer already meets this requirement which wasn't hard.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Cedric Pinson Sent: 27 August 2009 11:43 To: OpenSceneGraph Submissions Subject: Re: [osg-submissions] osgAnimation delayed update fix Hi Michael, Another solution could be to run the update of bone in the skeleton update callback, and in order to avoid twice update of Bone (from the Skeleton UpdateCallback and by the default UpdateVisitor), it will need to add a check with a framestamp in UpdateBone update callback. Then it will be updated once, but called twice. It's not ideal but could be another solution. What do you think ? Cheers, Cedric - +33 659 598 614 Cedric Pinson mailto:[email protected] http://www.plopbyte.net On Tue, 2009-08-11 at 16:37 +0100, Michael Platings wrote: > When jumping around in time with a skinned model, I found that the > model was displaying the transformations from the previous frame. The > reason for this was UpdateSkeleton would update the bone matrices > before UpdateBone::update had been called. > It seems that the intention for this was to ensure the matrices were > updated before any RigGeometry could be updated. However, it also > means that the bones will always be in the position for the previous > frame. > I looked into trying to force the bones to update first but such an > approach introduced complexity and opened up the possibility of > causing other more subtle errors. Instead, I believe the most elegant > solution is to simply require that bones be ordered before other > objects within the child list. > > I've moved the matrix updating from UpdateSkeleton to UpdateBone. > UpdateSkeleton now merely checks that Bones appear before other > children and issues a warning if this isn't the case. > > ______________________________________________________________________ > This email and any files transmitted with it are confidential and > intended solely for the use of the individual or entity to whom they > are addressed. If you have received this email in error please notify > the system manager. > > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscene > graph.org ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ______________________________________________________________________ This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
