The Curve command draws a curve from control point locations.


1. Pick the start of the curve.
2. Pick the next points.
3. Press Enter to end the curve.

Note: The Curve command makes a curve of degree <number of points> -1 as long as the number of control points is less than or equal to the degree setting.

Command-line options


Closes the curve when the cursor moves close to the curve's start point.

AutoClose steps

1. Move the cursor close to the start point of the curve, and pick.

The curve will close.

2. Press the Alt key to suspend automatic closing.


Specifies the degree of the curve (or surface).

When drawing a high-degree curve, the output curve will not be the degree you request unless there is at least one more control point than the degree.


The PersistentClose option closes the curve as soon as there are two points placed.

Note: If you continue to pick points, the curve updates the shape while remaining closed.


Closes the curve smoothly, creating a periodic curve.


Closes the curve with a kink, creating a non-periodic curve.


The Undo option reverses the last action.

See also

Draw lines and curves

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015