ARROWPLOT - Make a plot of arrow shapes, like quiver
H=vlt.plot.arrowplot(X,Y,THETA,SCALE, ...)
Plots arrows at positions X and Y with directions
THETA (in DEGREES) and scale SCALE, according to the
properties below, which can be modified by providing
additional name/value pairs. The arrow will be rotated to
point in THETA (in degrees, cartesian form, so
0 is rightward and angle proceeds counterclockwise).
The arrow length and arrowhead length will be scaled by
values in SCALE.
The name/value pairs that can be specified:
Property (default) : Description
-------------------------------------------------------
length (1) : Line length
linethickness (2) : Line thickness
linecolor ([0 0 0]) : Line color (black by default)
headangle (30) : Angle of arrowhead sweep back
headlength (0.5) : Size of arrowhead length
See also: vlt.plot.drawshape