home *** CD-ROM | disk | FTP | other *** search
- 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.
-