2b:null 2c:["$","title",null,{"children":"Piangle for Simone (diagonal) | emma-ba | Observable"}] 31:T86e,simone_large = { const col = ['#ff0', // '#9ff', // long gap '#f00', // '#ff0', // vertical lines - center '#f00', // small fumes - center '#000', // small fumes - ext '#f90', // vertical lines - ext '#fc9', // triangle bg 1 '#fff', // triangle '#930']; // triangle bg 2 let shift = 10; let rev = true; const u = 5; // unit const wu = 1047; // no. units on width const hu = 1047; // no. units on height const margin = 10; const board_height = hu*u + 2*margin; const board_width = wu*u + 2*margin; let data_top, new_top, r, l, x, y, digit_top; // Background const { canvas, context } = createCanvas(board_width, board_height); const pixelRatio = resize(canvas, board_width, board_height, ); context.scale(pixelRatio, pixelRatio); context.globalAlpha = 1; context.fillStyle = '#fff'; context.fillRect(0, 0, board_height, board_width); ///////////////// DATA ///////////////// const base = get_pi_txt(wu+1); data_top = [[]]; data_top[0] = base; for (let h = 1; h < hu; ++h){ data_top[h] = []; for (let w = 0; w < wu-h; ++w) { l = data_top[h-1][w]; r = data_top[h-1][w+1]; new_top = algo_s(l, r); data_top[h][w] = new_top; } } //////////////////// DRAW //////////////// for (let h = 0; h < hu; ++h){ for (let w = 0; w < wu-h; ++w) { ///// TOP digit_top = data_top[h][w]; x = w*u + margin; y = w*u + h*u + margin; if(rev){ digit_top = 9-digit_top; } digit_top = (shift+digit_top)%10; context.fillStyle = col[digit_top]; context.fillRect(x, y, u, u); ///// DOWN if(h!=0){ digit_top = data_top[h][w]; x = w*u + h*u + margin; y = w*u + margin; if(rev){ digit_top = 9-digit_top; } digit_top = (shift+digit_top)%10; context.fillStyle = col[9-digit_top]; context.fillRect(x, y, u, u); } } } return canvas; }32:T799,simone_small = { const col = ['#990', // '#9ff', // long gap '#f00', // diag '#ff0', // vertical lines - center '#f00', // small fumes - center '#000', // small fumes - ext '#f90', // vertical lines - ext '#fcf', // triangle bg 1 '#fff', // triangle '#930']; // triangle bg 2 const u = 1; // unit const wu = 1000; // no. units on width const hu = 1000; // no. units on height const margin = 10; const board_height = hu*u + 2*margin; const board_width = wu*u + 2*margin; let data_top, new_top, r, l, x, y, digit_top; // Background const { canvas, context } = createCanvas(board_width, board_height); const pixelRatio = resize(canvas, board_width, board_height, ); context.scale(pixelRatio, pixelRatio); context.globalAlpha = 1; context.fillStyle = '#fff'; context.fillRect(0, 0, board_height, board_width); ///////////////// DATA ///////////////// const base = get_pi_txt(wu+1); data_top = [[]]; data_top[0] = base; for (let h = 1; h < hu; ++h){ data_top[h] = []; for (let w = 0; w < wu-h; ++w) { l = data_top[h-1][w]; r = data_top[h-1][w+1]; new_top = algo_s2(l, r); data_top[h][w] = new_top; } } //////////////////// DRAW //////////////// for (let h = 0; h < hu; ++h){ for (let w = 0; w < wu-h; ++w) { ///// TOP digit_top = data_top[h][w]; x = w*u + margin; y = w*u + h*u + margin; context.fillStyle = col[digit_top]; context.fillRect(x, y, u, u); ///// DOWN if(h!=0){ digit_top = data_top[h][w]; x = w*u + h*u + margin; y = w*u + margin; context.fillStyle = col[digit_top]; context.fillRect(x, y, u, u); } } } return canvas; }33:[{"id":"34efc5064cab74f4007753420692ed31b5de2e67ff7f15f3bdf9787c825e6f5127db64a8063d75bad051c3f5a893b391e1a2f4a5f71c04dfd95d50994915f7d2","href":"https://static.observableusercontent.com/files/34efc5064cab74f4007753420692ed31b5de2e67ff7f15f3bdf9787c825e6f5127db64a8063d75bad051c3f5a893b391e1a2f4a5f71c04dfd95d50994915f7d2","name":"pi.txt","type":"text/plain","lastModified":1764534691577.113,"size":1000002}] 2f:{"id":"8a5d8d1108217ffa","slug":null,"title":"Piangle for Simone (diagonal)","thumbnail":"8b8e66c0947029d6e341e7cc56de1d7b0916db08fc85067faf4b6138565ef3f4","access_level":"public","create_time":"$D2025-11-30T20:31:31.577Z","update_time":"$D2025-12-01T11:08:31.138Z","view_time":null,"first_public_time":"$D2025-11-30T20:31:31.577Z","fork":{"id":"9a628b8ea99a52d0","slug":null,"title":"Piangle for Claire & Yann (diagonal)","owner":{"id":"5d9b00b2cdcd8028","login":"emma-ba","name":""}},"stars":3,"starred":false,"owner":{"type":"team","id":"5d9b00b2cdcd8028","login":"emma-ba","name":"","avatar_url":"https://avatars-next.observableusercontent.com/3950b079ad1fc587c84ccfe712c3cc77ad1e122194ac7deeaf2ea35c7bf0f25a","tier":"starter_2024"},"version":3347,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"261e0273bd70e808","login":"emma-ba","name":"","avatar_url":"https://avatars-next.observableusercontent.com/3950b079ad1fc587c84ccfe712c3cc77ad1e122194ac7deeaf2ea35c7bf0f25a","tier":null}],"members":[{"type":"individual","id":"261e0273bd70e808","login":"emma-ba","name":"","avatar_url":"https://avatars-next.observableusercontent.com/3950b079ad1fc587c84ccfe712c3cc77ad1e122194ac7deeaf2ea35c7bf0f25a","tier":null,"role":"editor"},{"type":"team","id":"5d9b00b2cdcd8028","login":"emma-ba","name":"","avatar_url":"https://avatars-next.observableusercontent.com/3950b079ad1fc587c84ccfe712c3cc77ad1e122194ac7deeaf2ea35c7bf0f25a","tier":"starter_2024","role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":null,"type":"notebook","body":{"title":"Piangle for Simone (diagonal)","cells":[{"id":0,"value":"# Piangle for Simone (diagonal)\n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":2429,"value":"$31","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":167,"value":"$32","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":3085,"value":"algo_s2 = (l, r) => { \n const start = 8; //0\n const thres_s = 9;\n const thres_d = 2;\n// 9 - 16 - 3\n// [8-9] - 15 - 3\n// 8 - 12 - 3\n// 9 - 12 - 2\n// 6 - 15 - 3\n// 9 - [12-18] - 1\n// 9 - 13 - 1\n// 9 - [8-10] - 4\n// 8 - 7 - 3\n// 8 - 9 - 2\n \n let diff = Math.abs(l - r);\n let sum = l + r;\n let new_d = start;\n \n if(l==r){new_d = r;}\n else if(l%r==0){new_d = r;}\n else if(r%l==0){new_d = l;}\n \n if(sum > thres_s){ new_d = sum ;}\n if(diff > thres_d){ new_d = diff ;}\n return new_d % 10; \n}","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":305,"value":"algo_s = (l, r) => { \n const start = 9;\n const thres_s = 16;\n const thres_d = 3;\n \n let diff = Math.abs(l - r);\n let sum = l + r;\n let new_d = start;\n \n if(l==r){new_d = r;}\n else if(l%r==0){new_d = r;}\n else if(r%l==0){new_d = l;}\n \n if(sum > thres_s){ new_d = sum ;}\n if(diff > thres_d){ new_d = diff ;}\n return new_d % 10; \n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":7,"value":"get_pi = (length) => {\n const D = Decimal.clone({precision: length+1});\n const one = D(1), four = D(4);\n const a = four.times(arctan(one.div(5)));\n const b = arctan(one.div(239));\n const pi = four.times(a.minus(b));\n const p = pi.toFixed(length); \n \n const digits = [3];\n for (let i = 1; i < length; ++i) {digits[i] = p[i+1]*1;}\n return digits;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":10,"value":"function arctan(x) {\n const x2 = x.times(x);\n let k = 1, y0, y1 = x;\n do {\n y0 = y1;\n if (k & 2) y1 = y0.plus((x = x.times(x2)).div(k += 2));\n else y1 = y0.minus((x = x.times(x2)).div(k += 2));\n } while (!y1.equals(y0));\n return y1;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":13,"value":"Decimal = require(\"decimal.js-light@2/decimal.min.js\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":15,"value":"resize = (canvas, width, height) => {\n // Desired width and height in pixels\n //const width = 1000;\n //const height = 500;\n \n // Device screen density, e.g. MacBook Pro is @2x\n const pixelRatio = window.devicePixelRatio;\n \n // Scale it up by pixel ratio for higher density screens\n canvas.width = width * pixelRatio;\n canvas.height = height * pixelRatio;\n \n // Set the style to the desired size so that it scales back down\n canvas.style.width = `${width}px`;\n canvas.style.height = `${height}px`;\n\n return pixelRatio;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":19,"value":"createCanvas = () => {\n const canvas = document.createElement('canvas');\n const context = canvas.getContext('2d');\n return { canvas, context };\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":268,"value":"pi_txt = FileAttachment(\"pi.txt\").csv({array: true});","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":242,"value":"get_pi_txt = (length) => {\n let pi = pi_txt[0][0];\n let digits = [];\n for (let i = 0; i < length; ++i) {digits[i] = pi[i]*1;}\n return digits;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":244,"value":"get_pi_txt(10)","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":636,"value":"12%1","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 30:"$2f:body"