Cap Surface

This command creates a surface that caps a closed curve or the edge of a closed surface. Caps are especially useful with extruded surfaces.

• Select a NURBS object. > Modify panel > Create Surfaces rollout > Dependent Surfaces group box > Cap
• Select a NURBS object. > Modify panel > NURBS toolbox > (Create Cap Surface)

Capping an extrude surface

Procedures

To create a cap surface:

The NURBS object must contain at least one closed curve.

1. In the NURBS toolbox, turn on (Create Cap Surface).
2. Move the mouse over the closed curve or the closed edge of a closed surface.

   If the cap can be created, the curve or edge is highlighted in blue.

3. Click the highlighted curve or edge.
   

   The Flip Normals control lets you flip the surface normals at creation time. (After creation, you can flip normals using controls on the Surface Common rollout.)

Interface

While a cap surface sub-object is selected, a rollout with cap surface controls is displayed at the bottom of the Modify panel.

Cap Surface rollout (creation time)

Flip Normals

Turn on to reverse the direction of the cap surface's normals.

Start Point

Adjusts the position of the edge or curve's start point.

The start point is displayed as a blue circle.

Cap Surface rollout (modification time)

Replace Curve

Lets you replace the parent curve or edge. Click the button, then click the new curve or edge on which to base the cap.

Start Point

Adjusts the position of the edge or curve's start point.

The start point is displayed as a blue circle.