API Reference ▸ Geometry The D3 4.0 API Reference has moved. This page describes the D3 3.x API. See one of: Voronoi - compute the Voronoi tesselation or Delaunay triangulation from a set of points. Quadtree - compute a quadtree from a set of points. Hull - compute the convex hull of a set of points. Polygon - perform polygon operations, such as computing area and clipping.