[Question] API for chekcing if point is in view or not given projection about d3-geo

[mbostock]

Try this: https://observablehq.com/@d3/testing-projection-visibility

[NickGeneva]

Hi @mbostock
Great, this is very helpful. Thanks!

Follow up: Are there any other example(s) I can look at to learn more about these projection streams and modify them? I'm not able to fully understand them just from the API docs and am trying to get a little better understanding of what is going on here under the hood.

Thanks!

[Fil]

Not sure where there are examples in the traditional sense, but one place where we use them in a relatively readable way is in Plot's projection source, starting on line 77: the stream is computed as
{stream: (s) => projection.stream(transform.stream(clip(s)))}

which you can read as: "project, then apply the (linear) transform (scale + translate), then clip"