radius is the radius in the local coordinate system.
segmentsu and segmentsv are used when the sphere has to be tesselated (either for interactive display or when converted to a triangle mesh).
A SphereGeom has the following slots:
|cog_slot||vec3||r||The local center of gravity|
|inertiatensor_slot||mat3||r||The local inertia tensor|
|segmentsu_slot||int||rw||The number of segments in u direction|
|segmentsv_slot||int||rw||The number of segments in v direction|
Center of gravity with respect to the local coordinate system.
Inertia tensor with respect to the local coordinate system.
The radius of the sphere.
The number of segments in u direction.
The number of segments in v direction.