Port¶

, or

Type:	int
Range:	[1, 3]

Sets the active port for global or local positioning.

Helix Ports¶
Number	Name	Position	Type	Coordinate System
1	Center	$[0, 0, \tfrac{h}{2}]$	point	$x'=[1, 0, 0], y'=[0, 1, 0], z'=[0, 0, 1]$
2	BottomCenter	$[0, 0, -b]$	point	$x'=[1, 0, 0], y'=[0, 1, 0], z'=[0, 0, 1]$
3	TopCenter	$[0, 0, h]$	point	$x'=[1, 0, 0], y'=[0, 1, 0], z'=[0, 0, 1]$

where $b$ is the TubeRadius or $b=0$ if EndCap is set to no, and $h=p\cdot w+b$ with Pitch $p$ and WindingNr $w$ .