Two parametric-associative rules, one for quadrilaterals the other for triangles, generate an apparently quasi-random pattern across a mainly quadrilateral mesh. Three more rules, including one non-parametric rule, translate the pattern into a surface with outlines of holes for laser-cutting. The non-parametric rules serves to replace the perpendicular ends of a rectangular cut line into semi-circles.

The final result:

The rules and derivation:

The five rules in close-up:

The relevant Rhino/GH files form part of the SortalGI plug-in.

Last update: 14 December 2020, webmaster @ sortal.org