NURBS

Create a NURBS curve.

1. On the ribbon, click the Curves tab.
2. Click the NURBS icon.
   
   
3. Optional: In the guide bar, enter a Degree, and then press Enter.
   Tip: You need to enter 2, 3, 4, or 5. Enter a higher degree for a smoother curvature.
4. In the modeling window, click to place the control points.
5. Right-click and mouse through the check mark to exit, or double-right-click.

Reposition and reshape a NURBS curve.

1. Double-click a NURBS curve to enter edit mode.
2. Edit the NURBS curve.

   To	Do this
   Reposition a point	Drag a point. Click a point, click the chevron, enter the x, y, and z coordinates, and then press Enter.
   Delete a point	Click a point, and then press Alt+D.
   Add a point	While holding down Alt, click or drag the desired additional point .
   Smooth the curve	Click a point, and then click Smooth.
   Sharpen the curve	Click a point, and then click Cusp.
   Open the curve	Click a point, and then click Open the curve here. Note: The curve needs to be closed before you can open it.
   Add weight to a point	Click a point, click the chevron, enter a Weight, and then press Enter. Note: Add weight to a control point to give it greater influence over the shape of the curve.

3. Right-click and mouse through the check mark to exit, or double-right-click.
   Tip: To close a curve, select one end point and drag it over the other until you see the preview of the closed curve.