Re: [JAVA3D] Geometry Update

[Michael Nischt]

Hi Doug, > This will work in the current implementation, but it is technically > one of those "undefined behavior" cases. in case david's suggestion isn't safe for the future - I hope there will be an 'official'  way, beause I don't know how to handle 3DSMax's MutiMaterials of a mesh instead and I need to share the vertices for effiecient vertex blending.. greetings -Michael Nischt > > Doug Twilleager > Java 3D Team > Sun Microsystems > > >Subject: Re: [JAVA3D] Geometry Update > >To: [EMAIL PROTECTED] > >MIME-version: 1.0 > >Delivered-to: [EMAIL PROTECTED] > > > >Ooh this is a good one! > > > >Since it is considered illegal to update the vertices of by-ref geometry > >outside of a geometry updater it would be "bad" to do as you have suggested. > >However, I am not sure if it would actually be a problem if you do this from > >a behavior since I would expect that both geometry array's would already be > >winging their way to the card.  But if you wanted to play it safe, try > >making a dummy updator that does nothing but invoke the other updater on the > >other geometry array.  This should lock both at the same time.  You could > >even build a generic class that could manage "shared by-ref geometry" to > >provide this locking. > > > >Dave Yazel > > > >-----Original Message----- > > > >From: Michael Nischt [mailto:[EMAIL PROTECTED]] > >Sent: Monday, April 01, 2002 1:16 PM > >To: [EMAIL PROTECTED] > >Subject: [JAVA3D] Geometry Update > > > > > >hello everyone, > > > >I have an question concerning geometry-update, with shared vertices: > > > >Two (Indexed)GeometryArrays (BY_REFERENCE) share the same vertices (with > >different indices), because some parts have different Materials. > >I decided to put the same cordinate/normal arrays in both and I update one > >with a GeometryUpdater, and  both were updated correct. :-) > > > >But I am wondering if this legal, because the second one has no > >GeometryUpdater ? do I have to put an dummy updater for the second one ? > > > >greetings > >-Michael Nischt > > > >btw. a Test application is attached for better understanding > > > > > > > > =========================================================================== > 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".