---
title: 'Offsets, booleans, and regions'
part: 'Part VI — Computational Geometry'
partNumber: 6
order: 3
subtitle: 'offsetpath, clippaths, std.regions, and parity vs union'
---

_Content coming soon._ Region area, poles, inset rings, clipped tile cells, grid points, and
partitions from `std.regions` now turn the low-level offset and clipping operators into a
practical region toolkit.

<Run>{`// Concentric inset fills via offsetpath
let shape = trace [ repeat 36 [ fd 4 rt 10 ] ]
let rings = [shape]
while len(rings) > 0 [
  let outer = rings[len(rings) - 1]
  let inner = offsetpath(outer, (-2))
  if len(inner) > 0 [ rings = append(rings, inner[0]) ]
  else [ rings = [] ]
]`}</Run>

<Checkpoint chapterId="ch-37">Chapter content coming soon.</Checkpoint>