HELIX allows you to create a 3-D spline or splines to
represent a helix curve of arbitrary orientation.

Define the direction of the helix by choosing from the
following options:

CCW - to designate the direction of the helix as
counter-clockwise.

CW - to designate the direction of the helix as clockwise.


Enter a value for the helix's pitch or number of turns of
the helix per unit length.

Define the extent of the helix curve or its length by
choosing from the following options:

ROTS - to define the number of rotations. You can enter
fractional values to define the angular separation between
the start and endpoints of the helix.

ARCLEN - to define the arc length of the helix curve.

AXIS - to define the distance measured along the major
axis of the helix.


Enter the requested information depending on the option
you chose.

Using Position Menu options, define two points on the 
major axis along the center of the helix. These two 
positions define the direction of the helix's axis. Any 
three-dimensional positions are valid as long as the two 
points are not coincident.

Using a Position Menu option, indicate a start point. This
point determines the direction of the x-axis, the radius,
and the base point on the major axis from which the helix 
is created. Any three-dimensional point position is valid,
as long as it is not coincident with the major axis.

Using the information entered from the given start point,
the helix is created with the appropriate skew, along the
major axis in the defined direction.

Indicate a new start point for the helix using the same
information.
