cone statement creates a finite length cone or a frustum (a cone with the point cut
off). The syntax is:
<Base_Point>, Base_Radius, <Cap_Point>, Cap_Radius
[ open ][OBJECT_MODIFIERS...]
< Cap_Point> are vectors defining
the x, y, z coordinates of the center of the cone's base and cap and
are float values for the corresponding radii.
Normally the ends of a cone are closed by flat discs that are parallel to each other and perpendicular to the
length of the cone. Adding the optional keyword
Cap_Radius will remove
the end caps and results in a tapered hollow tube like a megaphone or funnel.