In this example, an interior offset loop has been created at a distance of 10 units from the base loop. As the offset distance is increased the PGM splits the interior offset loop into two sub-loops, maintaining an intuitive profile.
The offset distance is then decreased until the offset loop passes through the base loop, becoming exterior to the base loop. Gaps that arise between adjacent offset edges are automatically capped. Here circular caps are being used. As the offset distance is increased, the PGM trims out the intersecting geometries that comprise the offset arch at the bottom of the profile.
These effects are all fully reversible, as illustrated in the animation.