node-d3-quadtree binary package in Ubuntu Focal amd64

 A quadtree recursively partitions two-dimensional space into squares, dividing
 each square into four equally-sized squares. Each distinct point exists in a
 unique leaf node; coincident points are represented by a linked list.
 .
 Quadtrees can accelerate various spatial operations, such as the Barnes–Hut
 approximation for computing many-body forces, collision detection, and
 searching for nearby points.
 .
 Node.js is an event-based server-side JavaScript engine.

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