The Default Box

The program uses a limiting box in some operations, for example, when intersecting a surface with a plane. The resulting curve will be trimmed with the box.

In a similar way to the default surface a box can defined as the default box. This is the limiting box used until you select a new default box.

At the beginning of each session, the box is set to cover the entire ship on the portside. In other words, the box is unlimited in all directions except for the minimum value along the y-axis, which is set to 0. If, however, the default parameter DEF_YMIN_NO_LIMIT is set, the box will be unlimited in all directions.