Port¶

, or

Sets the active port for global or local positioning.

A ring has the following ports (default Port is Center).

Ring Ports¶
Number	Name	Position	Type	Coordinate System
1	South	$[0, -r]$	tangential	$x'=[1, 0], y'=[0, 1]$
2	East	$[r, 0]$	tangential	$x'=[0, 1], y'=[-1, 0]$
3	North	$[0, r]$	tangential	$x'=[-1, 0], y'=[0, -1]$
4	West	$[-r, 0]$	tangential	$x'=[0, -1], y'=[1, 0]$
5	Center	$[0, 0]$	point	$x'=[1, 0], y'=[0, 1]$

where $r$ is equal to Radius plus half the LineWidth.