Hello Harald, In fact this is what I'm attempting, but realized that there is a more "subtle" way to do it. I think that switching the root entity and/or the frame graph would be more appropriate, than to actually create two separate GL widgets/windows.
Sean, No I don't really have any specific use cases. I think how it's now is fine. I believe my code hangs because of the order of destruction of my widgets, coupled with me creating the aspect engine on the stack. The actual dead-lock I get in qaspectmanager.cpp @ 246 : m_waitForEndOfExecLoop. acquire(1); My guess is for some reason, because of the structure of my objects, the event loop is not exiting. Still I wasn't able to reproduce it in a clean separate projects, so I'll continue debugging and if necessary will file a bug report. Kind regards. On Thu, Dec 17, 2015 at 12:08 PM, Harald Vistnes <harald.vist...@gmail.com> wrote: > Hi, > > I'm also interested in how to handle multiple windows with Qt3D. My use > case is a widgets based CAD like application that will have two independent > 3D windows in a QStackedWidget (so only one 3D window will be visible at a > time). They will have different models loaded and the user will switch from > one window to the other. Also, for each window, it must be possible to > render the current view (root QEntity) to a high-res image.So in this case > I guess there will be one QAspectEngine for each of the windows and then > temporary QAspectEngines for offscreen rendering that shares the root > entity with the other QAspectEngines? > > Harald > > > 2015-12-17 10:49 GMT+01:00 Sean Harmer <sean.har...@kdab.com>: > >> On Thursday 17 Dec 2015 11:37:49 Nye wrote: >> > Hello, >> > It (most probably) is a problem with my code. I've created two aspect >> > engines (this is in a widget and I have two instances). I suppose having >> > two aspect engines is not allowed? I've done it this way, because the >> > aspect engine handles a single surface/window. Interestingly, it happens >> > only with the logic aspect. On a related note, what would be the proper >> way >> > to use two gl windows with Qt3D? >> >> At present it is indeed to make two QAspectEngines as you are doing. This >> is >> something I'm looking into at the moment as it happens - well more >> generally >> what top level integration points do we need to support for the initial >> version. >> >> If you have specific use cases, I'd be interested to hear what they are. >> >> Cheers, >> >> Sean >> >> > >> > Kind regards. >> > >> > On Thu, Dec 17, 2015 at 10:52 AM, Sean Harmer <sean.har...@kdab.com> >> wrote: >> > > Hi, >> > > >> > > Can you file a bugreport with a small test case for this please? This >> was >> > > certainly working in the cases I tested. Perhaps there's a regression >> we >> > > need >> > > to fix. >> > > >> > > Thanks, >> > > >> > > Sean >> > > >> > > On Thursday 17 Dec 2015 09:51:51 Nye wrote: >> > > > Hello, >> > > > It seems for some reason that adding a logic aspect to the aspect >> engine >> > > > causes the application to "hang" on exit. My guess is that for some >> > > >> > > reason >> > > >> > > > the shutdown sequence is not executing properly and the threads in >> the >> > > >> > > pool >> > > >> > > > are left in waiting. Is there currently a workaround for that (i.e. >> can >> > > > I >> > > > manually shutdown the aspect engine)? I'm creating the aspect >> engine on >> > > >> > > the >> > > >> > > > stack, maybe this is an issue? >> > > > I'm developing on Debian stretch with 4.2 kernel, if that helps. >> Qt3D is >> > > > compiled from the most recent source available in the git >> repository for >> > > > the 5.6 branch. >> > > > >> > > > Kind regards. >> > > >> > > -- >> > > Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK >> > > KDAB (UK) Ltd, a KDAB Group company >> > > Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 >> > > Mobile: +44 (0)7545 140604 >> > > KDAB - Qt Experts >> >> -- >> Dr Sean Harmer | sean.har...@kdab.com | Managing Director UK >> KDAB (UK) Ltd, a KDAB Group company >> Tel. +44 (0)1625 809908; Sweden (HQ) +46-563-540090 >> Mobile: +44 (0)7545 140604 >> KDAB - Qt Experts >> _______________________________________________ >> Interest mailing list >> Interest@qt-project.org >> http://lists.qt-project.org/mailman/listinfo/interest >> > >
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