Cut

The Draw->Cut command in the Model module allows you to:

• Cut NURBS curves or surfaces at an exact position.
• Cut curves and patch surfaces at a U- or V-line or at the control point closest to where you click the mouse.

The cut section can then be translated as desired, while the original curve or surface is preserved.

You can continue cutting until you end the mode. At each step, the current selection is preserved. For example, cut a sphere in half and the original (whole) sphere is preserved. Cut the half sphere in half, and the half sphere is preserved as well as the quarter sphere, which is currently selected.

Note:

You can use the Draw->Cut command on open and closed NURBS curves, as well as NURBS surfaces. Currently, you can only cut open Linear, Bezier, Cardinal, B-Splines, and patch surfaces.

Procedure

1. Select the curve or surface you want to cut.
2. Choose the Draw->Cut command.
3. For non-NURBS curves or for patch surfaces, use the left or middle mouse buttons to cut the curve or surface. Right-click to exit the mode.
4. When you click on NURBS curve or surface, a dialogue box is displayed.

• Use the Location slider to interactively position the magenta point or curve.
• Click Cut to perform the cut or Exit to close the dialogue box.

NURBS Curves

When you select a NURBS curve, the NURBS Curve Cut dialogue box is displayed.

• Location adjusts the position for the cut along the curve. The currently selected position is indicated by a magenta point, which moves along the curve as you adjust the slider.
• Cut applies the setting without exiting the dialogue box.

NURBS Surface

When you select a NURBS surface, the NURBS Surface Cut dialogue box is displayed.

• Location adjusts the position for the cut along U (longitude) or V (latitude). The currently selected position is indicated by a magenta curve. This dialogue box is interactive so you can see the changes as you adjust the values.
• U, V direction selects the direction along which the surface is cut. U direction makes a longitudinal cut and V direction makes a latitudinal cut.
• Cut applies the settings without exiting the dialogue box.

Last updated 08-apr-1998