Allows you to create a
keypoint arc concentric to another keypoint arc.
To draw an arc concentric
to another arc
- Click the Arcs > Concentric
Arc
icon, or choose Arcs
> Concentric Arc from the Keypoint Curve Toolbox.
- Click the arc from which the new arc
will be offset.
- Click the start point of the arc, or
type a 3D coordinate to place the point exactly.
As you drag the start
point, the Concentric Arc tool displays
the distance between the two radii.
- Click the end point of the arc, or type
a 3D coordinate to place the point exactly.
Tips and notes
- Concentric arcs are always drawn in the
direction that creates the smallest sweep angle. If you want an
arc of more than 180 degrees, open the Information Window and
click the Complement button under the Attributes section.
- To create a concentric circle, set the
Angle/Sweep attribute to 360 degrees in the Information
Window.
Concentric Arc Options
- Degree
-
Specifies
the degree of the curve. The values range from 2 to 7. The default
is 6.
- Spans
-
Specifies the number
of spans in the curve. The values range from 1 to 14. The default
is 1.
NoteThe
sum of the degree and number of spans cannot exceed 16. When creating
rational geometry, as set in
Preferences > Construction Options 
, the
Spans option
is not available.
