rorschach.yaml

version: 1
name: Rorschach
description: |
  A world with both horizontal and vertical reflection symmetry,
  created with `imap`{=snippet}.
creative: true
robots:
  - name: base
    dir: north
    loc: [0, 0]
known: [tree]
world:
  dsl: |
    let trees = if (hash % 4 == 0) then {tree, dirt} else {stone}
    in
      overlay
      [ mask (x >= 0 && y >= 0) trees
      , mask (x >= 0 && y < 0) (imap x (-y) trees)
      , mask (x < 0 && y >= 0) (imap (-x) y trees)
      , mask (x < 0 && y < 0) (imap (-x) (-y) trees)
      ]