Closing Section and Ordering Points

Once the polyline have been combined into a Polyline List they may be in the wrong order in the group and have inconsistent point directions. PolyCAD provides a number of options which can be used to adjust hull section data as a group.

Closing and UnClosing

The closing and unclosing options allow the ends of each polyline to be joined together or joined to the centre plane to make closed sections when the data is mirrored. There are corresponding functions to reverse the process, i.e. Unclosing.


The section data imported into software may be unorganised. The Polyline List entity has options which can be used to order sections within the group in ascending longitudinal order. Other options can be used to set the keel as a consistent starting point on each section.

Changing Point Spacing >>>