SPHERE allows you to create a spline mesh that 
approximates a sphere. 

Create the mesh by choosing from the following options:

CTR+RAD - to create a mesh given the center and radius of 
a sphere, as well as the number of longitude and latitude
lines in the sphere.

CTR+DIA - to create a mesh given the center and diameter 
of a sphere, as well as the number of longitude and 
latitude lines in the sphere.


Locate the center of the sphere, using a Position Menu
option.

Enter a number greater than 0.0 to be used as the sphere
radius or diameter, depending upon which option you chose
(CTR+RAD or CTR+DIA).

Enter the number of longitude and latitude lines.

Indicate whether or not you want to group the entities.
Choose NO to continue without grouping. Choose YES to 
create a group, and enter a group name.

The mesh is created.
