SG_SPHERIC_BAND structure
The SG_SPHERIC_BAND structure is a presentation of a spherical band.
Has the following fields
double Radius;  spherical band radius
double BeginCoef;  initial spherical band cut coefficient
double EndCoef  final spherical band cut coefficient
short MeridiansCount  the number of spherical band meridians
Explanation:
BeginCoef must be from 1 to 1. If BeginCoef=1 the spherical band won't be cut from below
If BeginCoef=1 the spherical band won't be cut from above.
If BeginCoef=0 the spherical band will be cut by an equator of the corresponding sphere.
EndCoef must be from 1 to 1. If EndCoef=1 the spherical band won't be cut from below
If EndCoef=1 the spherical band won't be cut from above
If EndCoef=0 the spherical band will be cut by an equator of the corresponding sphere.
BeginCoef must be less than EndCoef.
Illustration:
BeginCoef = 0.5 EndCoef = 0.5 MeridiansCount = 5


BeginCoef = 0 EndCoef = 0.5 MeridiansCount = 10


BeginCoef = 1.0 EndCoef = 0 MeridiansCount = 24

Defined in sg3D.h