translate.yaml

version: 1
name: Translate
description: |
  An illustration of how to use `imap`{=snippet} to translate.  A basic patch is
  created and then overlaid at various translations.  Note that since
  `imap`{=snippet} works by mapping a function over the coordinates, translation
  is "backwards": for example, `imap (x+4)`{=snippet} translates 4 units to the
  *left*.
creative: true
robots:
  - name: base
    dir: north
    loc: [0, 0]
known: [rock]
world:
  dsl: |
    let patch = mask (abs(x) <= 4 && abs(y) <= 4) (if ((x + y) % 2 == 0) then {rock, dirt} else {dirt})
    in
      overlay
      [ patch
      , imap (x+6) (y+3) patch
      , imap (x-10) (y-7) patch
      , imap (x-14) (y+5) patch
      ]