[Qgis-psc] 2019 grant report: Fix problems in larger 3D scenes

[Tim Sutton]

Thank you so much for this Martin!

Anita maybe we can assemble the other grant reports and put them on the
blog? Happy to help with that....

Regards

Tim

A sexta, 17 de jan de 2020, 11:45, Martin Dobias <wonder.sk at gmail.com>
escreveu:

> Hi all
>
> I am pleased to announce that my 2019 grant proposal "Fix problems in
> larger 3D scenes" has been finally implemented and merged in time for
> 3.12 release.
>
> To summarize the work, the focus was on two issues within 3D map
> views. The first one was that map tiles were only being prepared using
> a single CPU core - this is now fixed and we may use multiple CPUs to
> load tiles of 3D scenes faster. The other (and greater) problem was
> that data from vector layers (when they have 3D renderer assigned)
> were all being prepared at once for the whole layer in the main
> thread. That resulted in possibly long freeze of the whole user
> interface while data were being loaded. This is now resolved as well
> and data from vector layers are being loaded in smaller tiles in
> background threads (and using multiple CPU cores). As a result, the
> overall user experience is now much  smoother.
>
> Many thanks for supporting this proposal and also big thanks to
> everyone who helped with reviews, testing and provided feedback. I
> believe this is one of the things that take us from the point where 3D
> map view is just a toy that works with small scenes to the point where
> the 3D view may be used for serious work with larger amounts of data.
>
> Relevant pull requests:
> - https://github.com/qgis/QGIS/pull/32737
> - https://github.com/qgis/QGIS/pull/33480
>
> Regards
> Martin
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