[Visualpython-users] why do straight 'curves' have 'knots'?

[Stephen H. <sh...@ua...>]

When I run this simple program, expecting a straight (tilted) line, I =
get a thing that's straight, all right, but it has narrow spots in =
places that make it look like it's twisted.  What's going on?

from visual import *
theta =3D0.4
c=3Dcurve(radius=3D0.04,color=3Dcolor.yellow)
for r in arange(0.1,1.0,0.1):
    c.append(pos=3D(r*cos(theta),r*sin(theta),0))
  =20
 =20
The reason I'm building a straight line in segments is so I can color it =
differently along its length.

Have I found some sort of VPython error or am I doing something dumb?

---Steve Highland
(still having lots of fun...)