I experienced problems with sharedgroups. This happens when the shared subgraph is complex. Then, memory usage exploded, performance broke down.
For non-complex subgraphs, there is no big win. Due to that, I relied on cloneTree(), esp. for the models coming out of John's 3DS loader :). At least I'd advice to keep an eye on it! http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4711657 - J ----- Original Message ----- From: "John Wright" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 03, 2004 10:20 PM Subject: Re: [JAVA3D] cloneTree vs. SharedGroup/Link > Alan, > > All in all Java 3D suffers from pretty bad "memory bloat". We do use > shared groups extensively in Pernica (creating dozens of copies of some > fairly complex models - 4000+ vertices) and they seem "ok". > > - John Wright > Starfire Research > > Alan Brockett wrote: > > > > Hi, > > > > I'm new to Java 3D and building an app that allows the user to create a > > sequence of "scenes", each of which contain any number of props, such as > > buildings, trees, vehicles. The props will typically be VRML or OBJ, loaded > > with one of the standard loaders. Number of props per scene will be on the > > order of 20-50. > > > > Many times a scene will be mostly a copy of a previous scene, e.g. same > > buildings but with vehicles in different positions, maybe a few new ones. > > So, it would be nice to not have multiple copies of the geometry in the > > scenegraph. > > > > I've just finished reading all of the posts to this list on cloneTree and > > SharedGroup. Seems that SharedGroup had a significant performance/memory > > bloat bug in 1.3, and many (but not all) responders recommended using > > cloneTree instead. > > > > But there have been no posts for quite a while on this subject, so I'm > > wondering what the latest (1.3.1) advice is regarding the use of > > SharedGroups vs. cloneTree? > > > [EMAIL PROTECTED] and include in the body of the message "help". =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".
