carto

[Fil]

I've left lots of question marks in the code; in particular the way the projection flows is wrong (and this forbids faceting).

[Fil]

I want to try and see if I can rewrite this as a plugin, without having to access a specific projection scale.

[Fil]

Converted to draft.

[Fil]

Rebased, but since this is never going to be part of Plot, the next step is to try and make a plugin version.

[Fil]

A plugin approach works
https://observablehq.com/d/7fe9cd66e7ed57fb

it needs to copy (or use) quite a lot of internals: {applyDirectStyles, applyIndirectStyles, applyTransform, ascending, clamp, create, filter, maybeNumber, maybeColor, positive, title, Style}

[mbostock]

this is never going to be part of Plot

Never say never. After we get the first release out and see the response we can plan out a roadmap and figure out what else we’ll start incorporating into Plot and when. Plugins are a great interim way for us to make functionality available and demonstrate demand for adding features to the core.