So, if the GUID isn't unique, that's a pretty lousy algorithm.... Luckily, I haven't observed that so far.
Ciaran On Tue, Jun 4, 2013 at 11:57 PM, Matt Lind <[email protected]> wrote: > Object GUID is persistent, but not granular enough. I’ve run into cases > where multiple items get the same GUID. Same goes for CLSID.**** > > ** ** > > Matt**** > > ** ** > > ** ** > > ** ** > > ** ** > > ** ** > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Ciaran Moloney > *Sent:* Tuesday, June 04, 2013 3:55 PM > > *To:* [email protected] > *Subject:* Re: Persistent objects ids**** > > ** ** > > Yes, you're right...I can reproduce a change of ID when deleting an object > and re-opening a scene. However, I would not dismiss the object GUID, which > appears to persists between sessions despite the change in the object ID > value. In the below snippet the sphere object changed ID but not GUID.**** > > ** ** > > # Name: cylinder**** > > # ID: 114**** > > # GUID: {090F2A9A-D1FC-4112-ACC5-9345BEB48954}**** > > #**** > > # Name: disc**** > > # ID: 92**** > > # GUID: {D03EF191-3962-4540-929D-F5438CE59D79}**** > > #**** > > # Name: torus1**** > > # ID: 68**** > > # GUID: {1AC14CC7-1175-4E30-9CDD-BC0C0C1DE6EA}**** > > #**** > > # Name: sphere**** > > # ID: 80**** > > # GUID: {CC63558A-D5A3-4F55-8621-6D428FE2743A}**** > > # --------------------**** > > ** ** > > # Delete cylinder, save and re-open scene **** > > ** ** > > # Name: disc**** > > # ID: 92**** > > # GUID: {D03EF191-3962-4540-929D-F5438CE59D79}**** > > #**** > > # Name: torus1**** > > # ID: 69**** > > # GUID: {1AC14CC7-1175-4E30-9CDD-BC0C0C1DE6EA}**** > > #**** > > # Name: sphere**** > > # ID: 99**** > > # GUID: {CC63558A-D5A3-4F55-8621-6D428FE2743A}**** > > #**** > > # --------------------**** > > ** ** > > ** ** > > **** > > On Tue, Jun 4, 2013 at 6:38 PM, Matt Lind <[email protected]> > wrote:**** > > This is not safe between sessions as IDs are dynamically generated and > assigned in the order objects were created in the scene. If an older > object is deleted and the scene reopened, everything after it will have a > new ID.**** > > **** > > Matt**** > > **** > > **** > > **** > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Ciaran Moloney > *Sent:* Tuesday, June 04, 2013 8:52 AM > *To:* [email protected] > *Subject:* Re: Persistent objects ids**** > > **** > > Hi,**** > > did you try XSIUtils.DataRepository.GetIdentifier() passing the > siObjectGUID argument?**** > > I've used this to keep track of ICE nodes without relying on name strings. > It's persistent between sessions and is preserved when models are exported. > **** > > Works like a charm.**** > > The only problem is that it's possibly a bit tricky to get a pointer back > to the object, since you need to know what you're looking for. I use > Application.FindObjects() > to get a collection of objects of this class, then check for the ObjectGUID > I'm looking for.**** > > **** > > Ciaran**** > > **** > > **** > > On Tue, Jun 4, 2013 at 12:49 PM, Michal Doniec <[email protected]> wrote:* > *** > > Hi,**** > > **** > > Is there any obvious way I am missing which would allow me to identify > objects in the scene, but not by name?**** > > Something like ObjectID, but persistent between scene saves and loads. I > can generate UUID or something similar using "ObjectAdded" event and store > custom property but I'd rather avoid it.**** > > **** > > I want to be able to track objects regardless if they were renamed or not. > **** > > **** > > -- > ---------- > Michal > http://uk.linkedin.com/in/mdoniec **** > > **** > > ** ** >
