The Circle command draws a circle from a center location and a radius.
Command-line options
The Deformable option draws a NURBS approximation of the curve will be created with the degree and number of points you specify.
Deformable options
Degree
Specifies the degree of the arc.
When drawing a high-degree arc, the output curve will not be the degree you request unless there is at least one more control point than the degree.
PointCount
Specifies the number of control points.
The 2Point option draws the circle from the two ends of its diameter.
The 3Point option draws a circle through three points on the circumference.
3Point steps
Pick three points that define the circumference.
3Point option
Radius
Specifies the radius and orientation for the circle after two points have been picked.
The AroundCurve option draws a circle perpendicular to a curve.
The FitPoints option draws a circle by fitting to selected point objects, curve and surface control points, and mesh vertices.
FitPoint steps
Select point objects or control points.
A minimum of three points or control points is required.
The Tangent option draws a circle tangent to curves.
Tangent options
FromFirstPoint
Forces the circle or arc to go through the first picked point on the curve instead of allowing the point to slide along the curve.
Point
Allows a point that does not have to be a tangent point on a curve.
Radius
The circle is restricted to the specified radius. If a tangent point exists on the second curve that meets the radius requirement, the tangent constraint will appear at that point as you drag the circle.
The Vertical option draws a circle perpendicular to the construction plane.
Vertical steps
Pick the center and a radius or diameter.
Diameter/Radius options
Radius/Diameter
Toggles between accepting a radius value and a diameter value.
Pick a location or type a value.
Orientation
Specifies an orientation not on the construction plane
Pick a direction that will be perpendicular to the circle plane.
Circumference
Specifies the circle's circumference.
Type the circumference value at the command line or pick a location to show the circumference length.
Area
Specifies the circle's area.
Type the area value at the command line or pick a location to show the area value
See also
Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015