[FEATURE] Support Multipolygons

[FriederHannenheim]

Is your feature request related to a problem? Please describe.
Certain map features, entered as multipolygons are not rendered. For example this forest in a park in Dresden: https://www.openstreetmap.org/relation/421481

Describe the solution you'd like
Multipolygons need to be supported and rendered like other features

EDIT: After looking at the code it looks like Multipolygons may already be supported. If so, this issue is now a bug report.

To Reproduce

Generate a world using this command

cargo r -- --bbox="13.709221,51.033622,13.771019,51.071605" --path=<world path>

Run the following command in Minecraft:

/tp @p 3127 -61 3447

You are now at this fountain: https://www.openstreetmap.org/node/248204401

Which is surrounded by the forest linked above. You will see that the forest is not rendered in Minecraft.

[louis-e]

Hi there!
Sorry for the late response, this project exploded in popularity right before I planned my vacation. :D

Thank you for the report, I'll take care of fixing this as soon as possible. I remember some problems in the past we had with multipolygon elements, so this sounds plausible and should hopefully be fixed quickly!

Have an amazing start into the new year!

[louis-e]

Alright, back at it again! I now implemented multipolygon support for buildings with #165. Will be included in the next release. However, the floodfill algorithm will have a lot of struggles with this shape :D

I think it'll take a bit of time until we get to fix this exact park element. I'm already thinking about how to do it, it's not quite easy.

Grüße nach Dresden, dort war ich bis gestern noch! :)