What is required for creating Offset Curves regarding the curves to offset?

Creating offset curves requires that the original curves lie in the same plane, which directly affects the generation of the new offset curve. When curves are confined to the same plane, the offset curve can be created uniformly at a specified distance from the original curve, ensuring predictable and accurate results. This scenario allows for clear and direct geometrical relationships, as the offsets will maintain their relative positions derived from the original geometry.

In contrast, if the curves were to lie in different planes, it would complicate the offsetting process as there would be no consistent orientation for the offset work. Similarly, intersections between curves are not a condition necessary for offsetting, as offset curves can be generated from any non-intersecting curves; rather, their spatial relationships matter more. Similarly, limiting the process to only straight lines underestimates the capability of curve offsetting, which also applies to curves of various shapes, including arcs, splines, and more. Therefore, maintaining the same plane is crucial for properly creating offset curves.