Autodesk 663B1-05A111-1001 User Guide - Page 235

12 | Basics Menus Reference > Create > NURBS Primitives Pivot By default, the Pivot is set to Object, and the primitive is created at the origin. Specifically, its rotate and scale pivots are at the origin. If you set Pivot to User Defined, you can enter values in the Pivot Point X, Y, and Z boxes to position the pivots (and the primitive). Axis Select X, Y, or Z to specify a preset axis direction of the object. Select Free to enable the X, Y and Z Axis Definition boxes. Enter new values to select your own axis direction. Select Active View to create the object perpendicular to the current orthographic view. The Active View option has no effect when the current modeling view is a camera or perspective view. Start and End Sweep Angles These options let you create a partial sphere by specifying a degree of rotation. Degree values can range from 0 to 360 degrees. The following example shows the top view of a sphere with an End Sweep Angle of 180 degrees. Cubic Default = 360 End Sweep Angle = 180 Radius Sets the width and depth of the primitive. Surface Degree A Linear surface has a faceted appearance; a Cubic surface is rounded. For details on surface degree, see "Degree" on page 11. Basics 235