Creating Nurbs Primitives
Maya 2012 Tutorial
How to Add a Nurbs Primitive in Maya
The Nurbs primitives are often used as the building blocks for your models. There are multiple ways to add a Nurbs shape to the workspaces and edit it. Using the Create menu you can add a sphere, cube, cylinder, cone, plane, torus, circle or square.
The circle and square are unique in that they don't include a surface. They are just curves that define the shape. They can be used to create Nurbs objects such as loft or extruded shapes.
The cube is also different in that it is comprised of six separate Nurbs objects, one for each face of the cube.
Add a Nurbs sphere primitive to the workspace by choosing Create > NURBS Primitive > Sphere (include options).
In the sphere options you can set the sphere Radius and number of Sections and Spans.
You can also set the sphere's Start Sweep and End Sweep Angle. Once you are satisfied with your settings press the Create button.
Click the newly created sphere in the workspace and open the Channel Box.
Click makeNurbSphere1 in the Inputs section to access the sphere settings.
You can also add Nurbs primitives by clicking the Surfaces shelf tab, then click the desired shape icon.
To add a primitive from the shelf and view it's options, double-click the shape icon.
In addition to a sphere, you can also add a cube, cylinder, cone, plane, torus, circle or square.
Don't Forget the Attribute Editor
In addition to the Channel Box, you can also change your primitive settings in the Attribute Editor, makeNurb tab.
By default, Interactive Creation is enabled when creating primitives. If enabled, you will need to click once in the workspace, then click-drag to create your objects. To disable this feature, choose Create > Polygon Primitives > Interactive Creation.
Resetting Primitive Settings
Whenever you create a Nurbs Primitive, a new object is created based on the last time the tool was used. To reset the create primitive tool to the default values, open it's options and choose Edit > Reset Settings.