Polygon Geom

API Reference ▸ Geometry ▸ Polygon Geom

d3.geom.polygon(vertices)

Returns the input array of vertices with additional methods attached, as described below.

polygon.area()

Returns the signed area of this polygon. If the vertices are in counterclockwise order, the area is positive, otherwise it is negative.

polygon.centroid()

Returns a two-element array representing the centroid of this polygon.

polygon.clip(subject)

Clips the subject polygon against this polygon. In other words, returns a polygon representing the intersection of this polygon and the subject polygon. Assumes the clip polygon is counterclockwise and convex.