Yes, memory usage is huge, performance is poor compared to what I am using (Geometry By-Reference) now. I only turned the visibility on or off to avoid detaching the BranchGroup( another performance drop). But has never had geometry being altered or mix up. I don't use beta version either.
At 01:54 PM 7/5/2002 -0500, you wrote: >Increased memory usage, poorer than expected performance, renderbin >crashes (stopped when sharedgroups/links were removed), and geometry >seemingly getting altered and mixed up (a leg on one of my characters >suddenly replaced by a tree). That sort of thing. That was with 1.2 >though... haven't tried with the most recent beta. > >-----Original Message----- >From: Discussion list for Java 3D API >[<mailto:[EMAIL PROTECTED]>mailto:[EMAIL PROTECTED]]O >n Behalf Of Lan Wu-Cavener >Sent: Friday, July 05, 2002 1:52 PM >To: [EMAIL PROTECTED] >Subject: Re: [JAVA3D] Trouble with Link/SharedGroup - is it a Java3D >bug?? > >I don't know what kind of inconsistency you had. In my application the >usage of Link and SharedGroup does work, but the frame rate is really bad >while navigating the scene. I also use the combination to distribute trees >over terrain. > > >At 08:13 AM 7/5/2002 -0500, you wrote: > >I had some inconsistencies with Links and shared groups as well, and even > >stopped using them when I couldn't figure out what I was doing wrong > (memory > >use extreme, visual glitches, no perceived benefit to using them...) Will > >try to find my notes. > > > >Scott > >----- Original Message ----- > >From: "Joerg 'Herkules' Plewe" <[EMAIL PROTECTED]> > >To: <[EMAIL PROTECTED]> > >Sent: Friday, July 05, 2002 6:48 AM > >Subject: Re: [JAVA3D] Trouble with Link/SharedGroup - is it a Java3D bug?? > > > > > > > Subject: Re: [JAVA3D] Trouble with Link/SharedGroup - is it a Java3D > bug?? > > > > > > > > > > We also use shared groups to put in trees, boulders, etc, but we > haven't > > > > put all that many into a scene yet. I've not noticed any specific > > > > memory issues (Java 3D is a memory hog but we all know that). > > > > > > Sigh, ok, nobody seems to believe me.... > > > > > > Here is a small code snippet that demonstrates the effect (e.g. in a > > > HelloUniverse environment). > > > I turns out that the memory consumption depends on the > complexity/depth of > > > the subtree that > > > is used below the SharedGroup. I create an arbitrary tree with some > > > ColorCubes and TGs and > > > either Link/SharedGroup or cloneTree() it. The bigger the subtree, the > > > better the Link-solution > > > should be. In cases where the subtree in question only consists of > one or > > > two groups, it should > > > not make any difference at all anyway. > > > > > > The samples creates only 10 clones/links. While cloning keeps the memory > > > consumption well > > > below 40megs, Link gives an OutOfMemoryException even with -Xmx256mb. > > > > > > A smaller test (createDeepSubGraph(6)) works marginally with 256MB and > > > produces > > > 2.021.371 instances of javax.media.j3d.BranchGroupRetained. > > > > > > I'd really appreciate if someone could confirm my observation. > > > > > > > > > ================================================================ > > > > > > /** > > > * Create a subgraph with 10 objects by either Linking or cloning an > > > object. > > > */ > > > Node create10Objects( boolean clone ) > > > { > > > Group grp = new Group(); > > > > > > // Create a non-trivial subgraph > > > Node object = createDeepSubGraph( 7 ); > > > System.out.println( numNodesCreated ); > > > > > > // Setup sharedgroup > > > SharedGroup shared = null; > > > if ( ! clone ) > > > { > > > shared = new SharedGroup(); > > > shared.addChild( object ); > > > } > > > > > > // Add the objects > > > for ( int i = 0; i < 10; i++ ) > > > { > > > TransformGroup tg = new TransformGroup(); > > > Transform3D t3d = new Transform3D(); > > > t3d.setTranslation( new Vector3f( i * 2.0f, 0.0f, i * 2.0f ) ); > > > tg.setTransform( t3d ); > > > > > > // either link or clone the object > > > if ( clone ) > > > tg.addChild( object.cloneTree() ); > > > else > > > tg.addChild( new Link( shared ) ); > > > > > > grp.addChild( tg ); > > > } > > > return grp; > > > } > > > > > > > > > /** > > > * Create subgraph of a certain depth. > > > */ > > > static int numNodesCreated = 0; > > > Node createDeepSubGraph( int depth ) > > > { > > > BranchGroup g = new BranchGroup(); > > > > > > // One new cube... > > > g.addChild( new ColorCube( 0.1 ) ); > > > numNodesCreated++; > > > > > > // ...and maybe two subgraphs > > > if ( depth > 0 ) > > > { > > > Transform3D t3d = new Transform3D(); > > > Transform3D t3d2 = new Transform3D(); > > > TransformGroup tg; > > > > > > t3d.setScale( 0.2 * (double)depth ); > > > t3d2.setTranslation( new Vector3f( 0.2f, -0.2f, 0.0f ) ); > > > t3d.mul( t3d2 ); > > > tg = new TransformGroup(); > > > tg.setTransform( t3d ); > > > tg.addChild( createDeepSubGraph( depth - 1 ) ); > > > g.addChild( tg ); > > > > > > t3d.setScale( 0.2 * (double)depth ); > > > t3d2.setTranslation( new Vector3f( -0.2f, -0.2f, 0.0f ) ); > > > t3d.mul( t3d2 ); > > > tg = new TransformGroup(); > > > tg.setTransform( t3d ); > > > tg.addChild( createDeepSubGraph( depth - 1 ) ); > > > g.addChild( tg ); > > > } > > > return g; > > > } > > > > > > > >=========================================================================== > > > 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". > > > >=========================================================================== > >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". > >Lan Wu-Cavener >Dept. of Landscape Architecture > >=========================================================================== >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". Lan Wu-Cavener Dept. of Landscape Architecture =========================================================================== 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".
