28:null 29:["$","title",null,{"children":"Random walk, p4m symmetry | Visnu Pitiyanuvath | Observable"}] 2e:[] 2c:{"id":"043c9aab4eabd155","slug":"random-walk-p4","title":"Random walk, p4m symmetry","thumbnail":"e1809dfcdf4e14d5b9b11199c433ed591346229fd481981de9f452a37c684a03","access_level":"public","create_time":"$D2022-09-20T23:40:25.224Z","update_time":"$D2022-09-21T18:36:20.705Z","view_time":null,"first_public_time":"$D2022-09-21T03:21:36.567Z","has_unpublished_edits":null,"fork":false,"stars":3,"starred":false,"owner":{"type":"team","id":"31b136fdb993b00a","login":"visnup","name":"Visnu Pitiyanuvath","avatar_url":"https://avatars-next.observableusercontent.com/b847c4c49993b1df7599d355f47dc0ad9c2dcf43439ce9e8f3410e6368b3aac9","tier":"pro_2026"},"version":154,"publish_version":154,"role":null,"authored":false,"authors":[{"type":"individual","id":"dbf69c13a14d2f62","login":"visnup","name":"Visnu Pitiyanuvath","avatar_url":"https://avatars-next.observableusercontent.com/b847c4c49993b1df7599d355f47dc0ad9c2dcf43439ce9e8f3410e6368b3aac9","tier":null}],"members":[{"type":"individual","id":"dbf69c13a14d2f62","login":"visnup","name":"Visnu Pitiyanuvath","avatar_url":"https://avatars-next.observableusercontent.com/b847c4c49993b1df7599d355f47dc0ad9c2dcf43439ce9e8f3410e6368b3aac9","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":{"id":"0903e1aa04956e52","slug":"art","title":"Art","owner":{"id":"31b136fdb993b00a","login":"visnup","name":"Visnu Pitiyanuvath"}},"type":"notebook","body":{"title":"Random walk, p4m symmetry","cells":[{"id":0,"value":"# Random walk, p4m symmetry\n## Like https://eschersket.ch\n\nExploring dynamically generating playing card backs [for Poker](https://github.com/visnup/poker). Pretty sure this is the [p4m wallpaper group][1]…\n\n[1]: https://en.wikipedia.org/wiki/Wallpaper_group#Group_p4_(442)","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":107,"value":"viewof seed = Inputs.number({ value: 29, label: \"Seed\" })","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":121,"value":"viewof length = Inputs.range([10, 600], {label: \"Points\", value: 300, step: 1})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":22,"value":"","pinned":true,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":84,"value":"random = {\n length;\n const l = 75;\n const lcg = d3.randomLcg(seed);\n return () => l * lcg() - l / 2\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"function* points(n) {\n let [x, y] = [0, 0];\n while (n--) yield [(x += random()), (y += random())];\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":68,"value":"curve = d3.line().curve(d3.curveCatmullRom)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W2e","stdlib":"1","titling":"auto"}} 2d:"$2c:body"