geom2d

arc	Basic 2D arc geometry.
bezier	Cubic bezier curve.
box	Basic 2D bounding box geometry.
const	Floating point comparison functions and miscellaneous constants.
debug	Debug SVG output support for geometry package.
ellipse	Two dimensional ellipse and elliptical arc.
fillet	Connect Line/Arc segments with a fillet arc.
line	Basic 2D line/segment geometry.
planargraph	Simple planar graph data structure.
plotpath	Debug output support for geometry package.
point	Basic 2D point/vector.
polygon	Some handy polygon tools.
polyline	Polyline functions.
transform2d	Basic 2D affine transform matrix operations.
util	Basic 2D utility functions.
voronoiclip	Voronoi graph clipping.
voronoi	Voronoi diagram / Delaunay triangulation.