Posted by Phil on his phone on Feb 04, 2019; 12:43am
URL: https://forum.jogamp.org/Question-about-Java3D-and-Transformations-tp4039441p4039466.html

Not really, the passed in callback object will get the updategeometry method called on the j3d geometry thread that is carefully managed to not occur during rendering, java3d has a large number of threads it manages so that concurrency is maximised but synchronization is maintained