Raffi,
A bug report, BugId 4599536, has been filed for future
investigation.
thanks,
Chien Yang
Java 3D Team.
>Delivered-To: [EMAIL PROTECTED]
>MIME-Version: 1.0
>Date: Wed, 12 Dec 2001 14:09:36 -0500
>From: "Kasparian, Raffi J." <[EMAIL PROTECTED]>
>Subject: [JAVA3D] Bug: Quat vs AxisAngle
>To: [EMAIL PROTECTED]
>
>A bug that I first noticed with Java3D 1.1.3 is still present in Java3D
>1.3b1. When manipulating Transform3Ds above the ViewPlatform, using
>Transform3D.setRotation( Quat4d ) can produce the following error while
>Transform3D.setRotation( AxisAngle4d ) does not.
>
>javax.media.j3d.BadTransformException: non-congruent transform above
>ViewPlatform
> at
>javax.media.j3d.TransformGroupRetained.setTransform(TransformGroupRetained.j
>ava:138)
> at
>javax.media.j3d.TransformGroup.setTransform(TransformGroup.java:111)
> at orbiter.OrbiterViewer$1.processStimulus(OrbiterViewer.java:75)
> at
>javax.media.j3d.BehaviorScheduler.doWork(BehaviorScheduler.java:174)
> at javax.media.j3d.J3dThread.run(J3dThread.java:256)
>
>Surely this shouldn't be. Sun Programmers, can you determine what the
>problem might be? I should think that this is enough information but to give
>you a bit more context, here is the method in question:
>
>protected void placeViewer(){
> boolean useQuat = true;
> Transform3D T = new Transform3D();
> mySphereTG.getTransform( T );
> Quat4d quat = new Quat4d();
> T.get( quat );
> quat.inverse();
> viewerTG.getTransform( T );
> if( useQuat ){
> T.setRotation( quat );//sometimes crash
> }else{
> AxisAngle4d aa = new AxisAngle4d();
> aa.set( quat );
> T.setRotation( aa );
> }
> viewerTG.setTransform( T );
>}
>
>Thanks,
>
>Raffi
>
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