From the Wireframe section of the
action bar, click
Spiral.
In the Support box, select a supporting plane for the spiral.
In the Center point box, select the center point for the spiral.
In the Reference direction box, specify the direction
along which the radius value is measured and from which the angle is computed,
when the spiral is defined by an angle.
The spiral is previewed with the current options:
In the Start radius box, specify the value of the start
radius. It is the distance from the Center point, along
the Reference direction, at which the spiral's first
revolution starts.
In the Orientation box, define the spiral's orientation, that is the
rotation direction: clockwise or counterclockwise.
In the Type list, select the spiral creation mode, and
define the corresponding values.
Angle & Radius: The spiral is defined by a
given End angle from the Reference
direction and the radius value, the radius being
comprised between the Start and End
radius, on the first and last revolutions respectively
(that is, the last revolution ends on a point which is the distance from
the center point is the End radius value).
Ref. direction = Z, Start radius = 5mm, Counterclockwise,
End angle = 45 degrees, End radius = 20mm, Revolutions =
5
Angle & Pitch: the spiral is defined by a
given End angle from the Reference
direction and the pitch, that is the distance between
two revolutions of the spiral.
Ref. direction = Z, Start radius = 5mm, Clockwise, End
angle = 45 degrees, Pitch = 4mm, Revolutions = 3
Radius & Pitch: the spiral is defined by the
End radius value and the pitch. The spiral
ends when the distance from the center point to the spiral's last point
equals the End radius value.
Ref. direction = Z, Start radius = 5mm, Clockwise, End
radius = 20mm, Pitch = 6mm
Important:
Depending on the selected creation mode, the
End angle, End radius,
Pitch, and Revolutions
boxes are available or dimmed.
Click OK to create the spiral curve.
The curve (identified as Spiral.xxx) is
added to the tree.
.
