a. LSTCyl - Least Square Tapered Cylinder. Rotate all points about the axis to put points on same surface. Find least square line. Rotate line about cylinder axis to determine surface.
b. LSTCylMax - Least Square Tapered Cylinder Maximum. The least square line is translated to the highest point before rotating line about cylinder axis to determine surface.
c. LSTCylMin - Least Square Tapered Cylinder Maximum. The least square line is translated to the lowest point before rotating line about cylinder axis to determine surface.
