3d/Oblique view

[bsudekum]

How feasible is this? It would be truly amazing to have a 3d view.

cc @kkaefer @ansis @mourner

[kkaefer]

It's feasible, but will require quite a bit of implementation effort. Also, We're going to have to tessellate the buildings for this. http://opensciencemap.org/map/#scale=19,rot=42,tilt=65,lat=38.91,lon=-77.039 uses https://github.com/cscheid/tessellate/blob/master/tessellate.js for this.

[incanus]

We should definitely talk about this across projects with llmr-native, too. This will happen eventually (has to). I've started playing with tilting the actual GL view (i.e. not drawing in 3D directly) to some limited effect on iOS native.

Steps to me seem like:

• Get tilting working in GL directly.
• Get POI/other feature picking.
• Render building and other 3D features.
• (far future) Render terrain.

[ansis]

Picking this back up again:

• switch to indexed renders to get rid of degenerate triangle z-clipping
• projection matrices to create perspective view
• fix line antialiasing
• fix extrudes for text rendering
• level of detail
• labelling. this is a crazy problem so I'll try to do as little as possible for now

[springmeyer]

that is phenomenal!

[tmcw]

This, this is so cool.

[edenh]

awesome @ansis

[gundersen]

Amazing @ansis

[DennisOSRM]

@ansis awesome. I'd love to see this in action

[mourner]

Holy crap. This looks amazing. Already better than all in-car navigation devices I've seen.

[kkaefer]

Awesome work, Ansis!

[TheMarex]

Very cool! @ansis Can't wait to play around with this.

[mikemorris]

Awesome work @ansis!

[incanus]

Looking good @ansis. Great work.

[ansis]

merged in #1049
For remaining problems or wishes, open more specific issues

[atlefren]

Sorry if i'm jumping in here, but this is really cool! One question though: Have you given any thought to controls for this (keyboard-based or something like the GUI-control for rotate)?

[ansis]

@atlefren we haven't implemented anything yet, but there's an open issue #1063

[atlefren]

@ansis Oh, cool. I was thinking along the lines of a button, experimenting a bit with that now.

[benstadin]

I think with the transition from 2D to 3D, it's also time to move from tiles to cubes and scene graphs. I think some things will not work desirably or scale in the long run (LOD, styling,...), and the question is just when to start investing in new 3D-enabling technologies - especially on the server (or preprocessing tools) side.
Our company has an own 3D map renderer for native devices since quite some time (I'm the product owner and partly still developer), though it works with offline data only at the moment (and we don't have yet plans to change this). In comparison to the open source based web maps that we also deploy, we had to rethink about many things from scratch. Things like styling and other stuff just doesn't fit anymore if you go 3D (e.g. forget about traditional tiles with zoom levels, instead you need sooner or later distance-based and parent-child based style rules for object visibility and LODs).

[ansis]

@benstadin yeah, we've started to run into some of those problems. For now we're focusing mostly on 2d so that we can get that right, but I'd be really interested in reading anything more you have to say about how things could be done and how you've handled them in your own 3d renderer!