Thread: App for vector renderer maps, using OpenGL ES 2.0
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rinigus is offline rinigus
2017-09-18 , 07:07
Posts: 1,414 | Thanked: 7,547 times | Joined on Aug 2016 @ Estonia
#39
Originally Posted by MartinK View Post
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Yeah, that sounds to me as the way to go. We still can't use any form of Qt Location for Jolla Store apps, so depending on Qt Location from Qt 5.9 when another Qt 5 update on Sailfish OS is not even on the horizon is really a no-go.
As far as I remember, qmapboxgl does use some QtLocation structures, but I could be mistaken. If this will disqualify it from current Harbour - so be it. I am sure that Jolla will change the rules regarding QtLocation when they manage to get into working on QtLocation 5.6. There is surely a pressure from their customers to get it sorted, maybe just would take some time. In meanwhile, we can distribute via OpenRepos, if needed.

Originally Posted by MartinK View Post
What is the QML interface of the element like going to look like & what features will it likely support ?
Eq.: Just map centering, zooming control, etc. or more advanced stuff like POI markers any polyline display (routing trace/track logs) ? I've took a quick a for documentation of the upstream mapbox/mapbox-gl-native API and have not been really able to find a clear answer.
Mapbox GL Native allows you to add all these elements via GeoJSON and styling of the data. This should allow to add POIs, routes, any polygon... See https://github.com/mapbox/mapbox-gl-...window.cpp#L96 for the start of the example. I am planning to expose similar API as well as write a small wrapper allowing you to add routes/POIs/location icon easier. So, you would not have to draw anything above it, just regular widgets as you do for interaction. Let's see where I can get in a week.

Originally Posted by MartinK View Post
I'll likely integrating this map view first as an alternative option to the current fully tile based map view. At least until the features people expect to work (polylines, markers, maybe also overlays ?) can be provided by the Open GL based view as well.
We would probably need tile-based widgets, as you all have already, as well to support sources that are not compatible with the mapbox-gl. So, you would probably end up having two alternative ways to show the maps that you would have to switch in between in the application.

Originally Posted by MartinK View Post
BTW, what about offline usage ? Looking at the available documentation the widget seems to be basically locked to Mapbox for the input data for it's map rendering. How feasible does it look like making it (optionally ?) consume locally available data packs managed by OSM Scout Server and hosted @ modrana.org (as we already do with the other data packs) ?
Widget seems to be locked. Its actually possible to use other data sources, as done for https://openmaptiles.org/ . Right now I am developing against Mapbox data sources, since it easiest. Already now it should be possible to use other sources, but I have not tried.

As for offline, as soon as widget is ready, I am planning to add offline support for it via OSM Scout Server. We should be able to squeeze in additional datapack for mapbox gl, I presume it will be of similar size to mapnik datapack. Hopefully, data.modrana.org will be fine to host it . So, the plan is to go all the way with the full online and offline support. And I don't think there are any major roadblocks on the way.
 

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