Straight Skeleton
Last updated
Last updated
Get the straight skeleton of any horizontal planar geometry.
This is can also be used to generate core/perimeter sub-polygons if an offset is input AND the straight skeleton is not self-intersecting. In the event of a self-intersecting straight skeleton, the output line segments can still be used to assist with the manual creation of core/perimeter offsets.
This component uses a modified version of the the polyskel package (https://github.com/Botffy/polyskel) by Armin Scipiades (aka. @Bottfy), which is, itself, a Python implementation of the straight skeleton algorithm as described by Felkel and Obdrzalek in their 1998 conference paper Straight skeleton implementation (https://github.com/Botffy/polyskel/blob/master/doc/StraightSkeletonImplementation.pdf).
floor_geo [Required]
Horizontal Rhino surfaces for which the straight skeleton will be computed.
offset
An optional positive number that will be used to offset the perimeter of the geometry to output core/perimeter polygons. If a value is plugged in here and the straight skeleton is not self-intersecting, perim_poly and core_poly will be ouput.
polyskel
A list of line segments that represent the straight skeleton of the input _floor_geo. This will be output from the component no matter what the input _floor_geo is.
perim_poly
A list of breps representing the perimeter polygons of the input floor_geo. This will only be ouput if an offset is input and the straight skeleton is not self-intersecting.
core_poly
A list of breps representing the core polygons of the input floor_geo. This will only be ouput if an offset is input and the straight skeleton is not self-intersecting, and the offset is not so great as to eliminate the core.
