[Interest] [Qt3D] Ununderstable message when closing a scene

[Xavier Bigand]

https://bugreports.qt.io/browse/QTBUG-54184

For the leaks I need to check, but firstly it seems that textures stay in
RAM even when already in VRAM.

2016-06-17 12:33 GMT+02:00 Sean Harmer <sean.harmer at kdab.com>:

> Hi,
>
> On Friday 17 June 2016 12:11:56 Xavier Bigand wrote:
> > I finally found a work around to fix my crash when loading models
> > after few unload.
> >
> > I simply release myself all children of the delete entity with the
> > following recursive method :
> >
> >
> >     void    releaseModel(Qt3DCore::QNode& model)
> >
> >     {
> >
> >         QEntity*    entity = dynamic_cast<QEntity*>(&model);
> >
> >
> >         if (entity)
> >
> >         {
> >
> >             QComponentVector    components = entity->components();
> >
> >
> >             foreach (QComponent* component, components)
> >
> >             {
> >
> >                 entity->removeComponent(component);
> >
> >                 delete component;
> >
> >             }
> >
> >         }
> >
> >
> >         QNodeVector nodes = model.childNodes();
> >
> >
> >         foreach (QNode* node, nodes)
> >
> >         {
> >
> >             releaseModel(*node);
> >
> >             delete node;
> >
> >         }
> >
> >     }
> >
> >
> >
> > I don't know why I haven't the same behavior when letting Qt doing it.
> >
> >
> >
> > Need I fill a bug?
>
> Yes, please file a JIRA. Ideally with a test case. Also for any leaks you
> suspect.
>
> Thanks,
>
> Sean
>
> >
> >
> >
> > It seems that Qt3D have a lot of memory leaks, after changing a few
> > projects our application use more than 1Go when with our actual 3D engine
> > it's always lower than 200Mo.
> >
> > 2016-06-16 23:03 GMT+02:00 Xavier Bigand <flamaros.xavier at gmail.com>:
> > > Thank for the report.
> > >
> > > I was not sure if it wasn't me doing something wrong.
> > >
> > > But it might be the case, because the assert seems to come from a bad
> > > ressources management.
> > > When I switch projects I simply delete entities that attached to the
> root
> > > one, but doing this leads to the assert at a certain time and memory
> leaks
> > > apparently.
> > >
> > > My scenes are composed of objects that I load from a custom file
> format,
> > > it's for an architecture software.
> > >
> > > I can load 2 projects in a row, and on the third I get the assert.
> > >
> > > It seems that I can debug when using Visual instead of QtCreator. And
> it
> > > surprise me because the release of ressources seems to be done later
> than
> > > when I call the delete of entities.
> > >
> > > 2016-06-16 21:14 GMT+02:00 Harald Vistnes <harald.vistnes at gmail.com>:
> > >> I get the same QMetaProperty::read warning. I just filed a Jira for
> it.
> > >> https://bugreports.qt.io/browse/QTBUG-54159?filter=17174
> > >>
> > >> Annoying and it came recently, but not critical as you can continue
> > >> running the debugger.
> > >>
> > >> Harald
> > >>
> > >> 2016-06-16 17:53 GMT+02:00 Xavier Bigand <flamaros.xavier at gmail.com>:
> > >>> Sometimes when it doesn't crash on the first scene switch I can get
> this
> > >>> assert :
> > >>> ASSERT: "m_entries[index].m_counter == handle.counter()" in file
> > >>> c:/Users/qt/work/qt/qt3d/src/core/resources/qhandlemanager_p.h, line
> 170
> > >>>
> > >>> Sadly it seems that I am not able to debug it with source code.
> > >>>
> > >>> 2016-06-16 17:35 GMT+02:00 Xavier Bigand <flamaros.xavier at gmail.com
> >:
> > >>>> I am getting the following message when I unload a scene. I am
> simply
> > >>>> deleting the entities I don't have to display anymore.
> > >>>>
> > >>>> QMetaProperty::read: Unable to handle unregistered datatype
> > >>>> 'Qt3DRender::QBuffer*' for property 'Qt3DRender::QAttribute::buffer'
> > >>>>
> > >>>> What is the proper way to unload meshes in c++? Need I also delete
> all
> > >>>> attached components (QGeometryRenderer, QBuffer, ...)?
> > >>>>
> > >>>> --
> > >>>> Xavier
> > >>>
> > >>> --
> > >>> Xavier
> > >>>
> > >>> _______________________________________________
> > >>> Interest mailing list
> > >>> Interest at qt-project.org
> > >>> http://lists.qt-project.org/mailman/listinfo/interest
> > >
> > > --
> > > Xavier
>
> --
> Dr Sean Harmer | sean.harmer at kdab.com | Managing Director UK
> Klarälvdalens Datakonsult AB, a KDAB Group company
> Tel. UK +44 (0)1625 809908, Sweden (HQ) +46-563-540090
> KDAB - Qt Experts - Platform-independent software solutions
>



-- 
Xavier
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