Chien Yang wrote: > Sean and Justin, > > I'm a little confuse on whether the NPE is on addChild() or > setChild(). We did fix a bug reported by Justin in j3d1.3beta2 : > > BugId 4633672 : Group.setChild() may throw NullPointerException.
Hmmm.. That's interesting because I thought I reported it on the addChild() not setChild(). Oh well, I could be wrong on that. :( I had to remove the addChild() calls at the same time because it is pointless having those when I can't setChild() as well so I may have missed a secondary bug there. Anyway, the basic process is that during the scene graph the process is to addChild(null) as a placeholder for nodes that you want to add later. Then, later on, you just do setChild(new_node_pointer, 0); The idea behind this is that it is one less capability bit to need to switch on. Instead of needing both write and extend, you just need write capabilities. -- Justin Couch http://www.vlc.com.au/~justin/ Java Architect & Bit Twiddler http://www.yumetech.com/ Author, Java 3D FAQ Maintainer http://www.j3d.org/ ------------------------------------------------------------------- "Humanism is dead. Animals think, feel; so do machines now. Neither man nor woman is the measure of all things. Every organism processes data according to its domain, its environment; you, with all your brains, would be useless in a mouse's universe..." - Greg Bear, Slant ------------------------------------------------------------------- =========================================================================== 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".
