enum MbeSmoothForm
{
st_Unknown = -3, // Undefined blend
st_Ellipse = -2, // Fillet by an ellipse arc with radius recalculation
st_Span = -1, // Fillet with a given chord
st_Fillet = 0, // Fillet with given radii
st_Chamfer = 1, // Chamfer with given legs
st_Slant1 = 2, // Chamfer by leg and angle (leg distance2 is computed for a right angle between faces and defines the angle adjacent to leg distance1)
st_Slant2 = 3, // Chamfer by angle and leg (leg distance1 is computed for a right angle between faces and defines the angle adjacent to leg distance2)
st_ByCurvature = 4 // Fillet with curvature continuity at the boundary with supporting surfaces
};