Hi, On Thu, 2006-08-17 at 14:33 +0200, Marcus Lindblom wrote: > Allen Bierbaum wrote: > >> We could probably contribute on that, we definitely need > >> animations! BTW: OpenSceneGraph has anims ;) > >> > >> > > I think one of the reasons for this is that OpenSceneGraph has an app > > traversal to update animations and other changes in the graph. OpenSG > > currently doesn't support this as a first class traversal. I know we > > would really like to see some type of support for this formalized so we > > can put more logic into the scene graph where it makes sense for our > > applications. > > I think it makes sense to separate 'object-update-with-time' traversal > and the scene-graph itself. Attempting to bundle everything together in > one interface (i.e. Node) tends to make things a bit messy in terms of > dependencies. (I've seen some such systems.) > > But yes, some kind of time-dependent framework which would update the > visual components would be very nice. > > The problem with all systems is that you need to handle ordering of > update dependencies somehow. I.e. first update transforms from time & > data, then compute skinning and/or setup shader constants. Adding > normalization/tangent space and other derived data to this makes it even > trickier. Usually, we solve such things by create a directed graph from > each objects dependency and sorting that to get an update order (this is > only done when the ordering is dirty.)
just my 0.02$. As OpenSG keeps track of what changed a light, observer based approach might be not so uninteresting. regards, gerrit ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
