New implementation of a vector tile renderer

[charlenni]

Hi @memsom

As promised, I inform you, that I have made a new version of a vector tile renderer. You could find it here.

The advantage is (I hope), that the parts are separated, and it should be possible to add new things in different parts. Now it could be using MBTiles files as source. HTTP shouldn't be a problem, but I didn't test it up to now. There are different sources (for byte data and tile data). The tile data could then be used for a converter (OpenMapTiles, Mapbox, later perhaps Mapsforge...) that transfers the vector tile data to a vector tile. This verctor tile could then be styled by a style file (at the moment a Mapbox style file). This rendered vector tile could then be drawn with different libraries (at the moment only SkiaSharp).

I made a control for using the things with Mapsui and a sample with Avalonia to use it. All is drawn on the fly. It should be possible to do it like AliFlux do it and draw the tiles offline (see SkiaSharp tests).

[charlenni]

I now have also implemented street names and removed some bugs. Now looks like the following screenshot.

[pauldendulk]

@charlenni That looks absolutely great!

I am currently deep into a PR where I try to improve rendering performance for vector tiles. As part of that I also copied some VexTile files to Mapsui (SkiaCanvas.cs and VexTileRenderer.cs, those which could be copied back later). Not sure if that is related to what you are doing, but I thought I should let you know. I am trying to ignore everything else for now.

[charlenni]

Hi @pauldendulk

This library has nothing to do with the old AliFlux or, now, VexTile. Both are creating tiles as bitmaps. My solution create real vector tiles and vector symbols. If you use it, you will see, that symbols are always viewport oriented even if you rotate the map. The drawing is calculated on the fly with space in mind.

I saw your new renderers already, but wait until I see, how to use it.