Properties for parameters of geomCurve().
Angle in degrees, giving an amount to skew the control points of the curve. Values less than 90 skew the curve towards the start point and values greater than 90 skew the curve towards the end point.
Specification for arrow head, as created by arrow() function.
arrow()
The amount of curvature. Negative values produce left-hand curves, positive values produce right-hand curves.
The number of control points used to draw the curve. More control points creates a smoother curve.
Space to shorten a curve by moving the start/end.