Philippe Rivière

i've updated https://observablehq.com/@fil/d3-hexbin-playground to use the new code.

@mbostock can we go with this? It would make a nice 1.0 version

Here is another use case for the `angle` and `context` methods https://observablehq.com/@fil/graphene-moire-1-1

Hello, I've tried the gratzl layout in [this Observable notebook](https://observablehq.com/@fil/gratzl-tree); it's very nice! Note that to make it work with transitions, it seems we have to reset `widths=[]` and all...

We should probably cut short when we're at the desired depth, and avoid a traversal of the branches that are deeper.

@danburzo if you'd like to review?

See also https://github.com/d3/d3-shape/issues/118 #52 #67

see #87

In the same vein, it would be nice to be able to substitute the default ("number") interpolation method called by interpolateString, for one that, for example would limit the digits...

a similar approach (different syntax but same purpose) was proposed in https://github.com/d3/d3-interpolate/pull/43