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Toric Voronoi

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Using d3-voronoi on a torus.

The solution is to have height copies of each site, on N, NW, W, etc., using the cylinder technique twice.

The n first cells and n first sites are the originals.

We add a shadow property to copies of sites, and filter out links that have only shadow copies.

Made by Philippe Rivière from mbostock‘s block: Canvas Voronoi