Sorry I am in a hurry... but have you tried 1. creating branchgroups with no geometry, with user data pointing to the real branchgroup 2. set bounds autocompute off 3. Set the bounds to the bounds of the other branchgroup 4. Pick against the scene for bounds
For the case where you dont want to use the proxies you will need to do the picks that get back multiples and discard the proxy hits. Dave ----- Original Message ----- From: "Justin Couch" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, May 21, 2002 6:50 PM Subject: [JAVA3D] Queries on creating/using picking proxies I'm stuck. For once I can't work out how to convince Java3D to do something that I would really like to be able to do. Hopefully someone has some bright idea that I've missed. VRML defines a node called Collision which allows a user to either turn off collision avoidance/terrain following (it is on by default in VRML) and/or to provide proxy objects for collision handling. The proxy would be used to simplify a complex object like a mesh into something simple, like a box. My basic problem is that in Xj3D we do everything through picking. Navigation is performed using a pick on the rendering scene graph each frame. This is great when you have real geometry, but when you want to not use real geometry, but instead use the proxy geometry, things get complex. I can't seem to find a way of putting the proxy geometry into the scene and have it be used as the target for picking and not have it render. From what I can determine, picking only works on objects that are rendered. For example, if I put in geometry as a proxy and set the rendering attributes to be not rendered (which is a real pain as the appearance may be many levels down from the top of the proxy) the picking seems to fail to find the proxy object. It's hard to tell from the documentation whether or not this is a good thing. Anyone have some insights or pontifications about how to go about this? -- 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". =========================================================================== 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".
