diagram.polygons()

diagram.polygons()

Returns an array of polygons clipped to the extent, one for each cell in the diagram. Each polygon is represented as an array of points [x, y] where x and y are the point coordinates, and a data field that refers to the corresponding element in data. Polygons are open: they do not contain a closing point that duplicates the first point; a triangle, for example, is an array of three points. Polygons are also counterclockwise, assuming the origin ⟨0,0⟩ is in the top-left corner.

If the cell’s site is coincident with an earlier site, the associated polygon is null.