Port¶

Type:: enum
Range:: Origin
Default:: Origin
Appearance:: simple

, or

Type:: int
Range:: [1, 2147483647]

A polygon has a point-Port (globally oriented) at its vertices and tangential ports at the midpoints of its segments. Further, a polygon has the default port Origin which coincides with the origin of the global coordinate-system.

The port ordering is as follows, where $\pvec{p}_i^{(j)}$ denotes the $i$ -th point of the $j$ -th polygonal chain with $N^{(j)}$ points and $J$ is the number of polygonal chains:

Ports of a generalized polygon¶
Number	Name	Position	Type	Coordinate System
1		$p_1^{1)}$	point	$x'=[1, 0], y'=[0, 1]$
…		…	point	…
$N^{(1)}$		$p_N^{(1)}$	point	$x'=[1, 0], y'=[0, 1]$
$N^{(1)}+1$		$(p_1^{(1)}+p_2^{(1)})/2$	tangential	$x'=(p_2^{(1)}-p_1^{(1)})/\|p_2^{(1)}-p_1^{(1)}\|, y'=R_{90} \cdot x'$
…			tangential	…
$2N^{(1)}$	…	$(p_{N^{(1)}}^{(1)}+p_1^{(1)})/2$	tangential	$x'=(p_1^{(1)}-p_{N^{(1)}}^{(1)})/\|p_1^{(1)}-p_{N^{(1)}}^{(2)}\|, y'=R_{90} \cdot x'$
…	…	…	…	…
$2 \sum_{j=1}^{J-1} N^{(j)}$		$p_1^{1)}$	point	$x'=[1, 0], y'=[0, 1]$
…		…	point	…
$2 \sum_{j=1}^{J-1} N^{(j)}+N^{(J)}$		$p_N^{(j)}$	point	$x'=[1, 0], y'=[0, 1]$
$2 \sum_{j=1}^{J-1} N^{(j)}+N^{(J)}+1$		$(p_1^{(J)}+p_2^{(J)})/2$	tangential	$x'=(p_2^{(J)}-p_1^{(J)})/\|p_2^{(J)}-p_1^{(J)}\|, y'=R_{90} \cdot x'$
…			tangential	…
$2 \sum_{j=1}^{J} N^{(j)}$	…	$(p_{N^{(J)}}^{(J)}+p_1^{(J)})/2$	tangential	$x'=(p_1^{(J)}-p_{N^{(J)}}^{(J)})/\|p_1^{(J)}-p_{N^{(J)}}^{(2)}\|, y'=R_{90} \cdot x'$
$2 \sum_{j=1}^{J} N^{(j)}+1$	Origin	$[0, 0]$	point	$x'=[1, 0], y'=[0, 1]$