voronoi.update?

[mbostock]

How is delaunay.update supposed to interact with delaunay.voronoi? I assume you are expected to call delaunay.voronoi again after calling delaunay.update, but it’d be nice if there were an equivalent voronoi.update method.

[mourner]

Yeah, adding an update method would allow us to avoid repeated allocation of these two arrays:

d3-delaunay/src/voronoi.js

Lines 8 to 9 in 86be03c

	const circumcenters = this.circumcenters = new Float64Array(triangles.length / 3 * 2);
	const vectors = this.vectors = new Float64Array(points.length * 2);

triangles may slightly vary from update to update, but is close to the max (2 * numPoints - 5), so we could do the same trick as Delaunator — allocate a maximum length circumcenters array as a private property and then expose a trimmed one as voronoi.circumcenters, referencing the same memory (with subarray).

[mbostock]

Works great! ❤️

https://observablehq.com/@mbostock/meandering-voronoi