Port¶

Type:	enum
Range:	Center, East, North, Point1, Point2, Point3, Point4, South, West
Default:	Center
Appearance:	simple

, or

Type:	int
Range:	[1, 2147483647]

Sets the active port for global or local positioning.

Trapezoid Ports¶
Number	Name	Position	Type	Coordinate System
1	Point1	$p_1$	point	$x'=[1, 0], y'=[0, 1]$
2	Point2	$p_2$	point	$x'=[1, 0], y'=[0, 1]$
3	Point3	$p_3$	point	$x'=[1, 0], y'=[0, 1]$
4	Point4	$p_4$	point	$x'=[1, 0], y'=[0, 1]$
5	South	$(p_1+p_2)/2$	tangential	$x'=(p_2-p_1)/\|p_2-p_1\|, y'=R_{90} \cdot x'$
6	East	$(p_2+p_3)/2$	tangential	$x'=(p_3-p_2)/\|p_3-p_2\|, y'=R_{90} \cdot x'$
7	North	$(p_3+p_4)/2$	tangential	$x'=(p_4-p_3)/\|p_4-p_3\|, y'=R_{90} \cdot x'$
8	West	$(p_4+p_1)/2$	tangential	$x'=(p_1-p_4)/\|p_1-p_4\|, y'=R_{90} \cdot x'$
9	Center	$(p_1+p_2+p_3+p_4)/4$	point	$x'=[1, 0], y'=[0, 1]$
10	Origin	$[0, 0]$	point	$x'=[1, 0], y'=[0, 1]$