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planar polygon clipping #25

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Fil opened this issue Feb 28, 2019 · 2 comments
Closed

planar polygon clipping #25

Fil opened this issue Feb 28, 2019 · 2 comments

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@Fil
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Fil commented Feb 28, 2019

The Imago projection needs to use polygon clipping; but it seems a bit absurd that we are doing spherical clipping (with 200 control points computed as the inverse of 200 planar points) just to do what is in the end a simple rectangular clipping. The thing is tricky because, so close to the limit, the spherical interpolation between control points might jump from one side to the other.
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Fil commented Jul 10, 2020

See d3/d3-polygon#4

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Fil commented Jun 23, 2024

The best library (as of today and as far as I know) is https://github.com/mfogel/polygon-clipping; see https://observablehq.com/@fil/hello-polygon-clipping.

@Fil Fil closed this as completed Jun 23, 2024
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