starting with a primitive ellipsoid solid, a solid cylinder is created such that one of the ends of the cylinder passes through the center of the ellipsoid. the solid cylinder is subtracted from the solid ellipsoid expecting to get half of an ellipsoid. instead something closer to a quarter of the ellipsoid is left................. anyone have any idea(s) on what might be going on. I don't "need" have of an ellipsoid; it was being created to support "process development" (aka: operator training) for bending of tapered asymmetric sections about an axis not passing through the section. thanks in advance for an idea(s) or suggestion(s)

Art
artesmith@earthlink.net

Horst-

thanks! based on your post I tried creating the cylinder "on-axis" and the subtraction yields the expected result! initially I'd created the cylinder "off-axis" to make sure the correct plane was created after creating the solid ellipsoid. may be a case of an "on-axis" algorithm being used with a missing translation to "on-axis"......

Art
artesmith@earthlink.net

Tim-

thanks for closing the loop! not a big deal all things considered since the work around is so easy.

Art
artesmith@earthlink.net