2b:null 2c:["$","title",null,{"children":"Piangle for Claire & Yann (diagonal) | emma-ba | Observable"}] 31:T8dc,ays = { let col = ['#FCf0cB','#D44000','#000','#186F65','#B5CB99','#AC7088','#FFBB5C','#C63D2F','#4dc','#FCE09B']; //col = ['#fff', '#ddd', '#bbb', '#999', '#888', '#777', '#666', '#444', '#222', '#000']; // 0.rare 1.light yellow 2.dark bordeaux 3.orange 4.purp 5.dark blue 6.light bg 7.orange 8.dark purp 9.light blue //col = ['#000','#BE6','#79155B','#EF4040','#C21292','#09c','#FFA732','#FAD586','#711DB0','#0cf']; col = ['#CAEDFF','#9c6','#79155B','#EF4040','#C21292','#09c','#FFA732','#FAD586','#711DB0','#0cf']; let shift = 10; let rev = true; const u = 1; // unit const wu = 500; // no. units on width const hu = 500; // 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_y(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:T8c6,luca = { let col = ['#000','#000','#184D47','#000','#BECA5C','#666','#E48900','#FAD586','#BE0000','#6886C5']; //col = ['#ddd','#333','#000','#000','#900','#999','#F97B22','#FAD586','#000','#fff']; // 0.rare 1.light yellow 2.dark bordeaux 3.orange 4.purp 5.dark blue 6.light bg 7.orange 8.dark purp 9.light blue //col = ['#000','#BE6','#79155B','#EF4040','#C21292','#09c','#FFA732','#FAD586','#711DB0','#0cf']; col = ['#CAEDFF','#ad0','#79155B','#EF4040','#C21292','#09c','#FFA732','#FAD586','#711DB0','#0cf']; //col = ['#ddd','#f00','#000','#00','#999','#f00','#000','#fff','#000','#f00']; //col = ['#000', '#A3423C', '#292C6D', '#000', '#781D42', '#777', '#DE834D', '#F0D290', '#000', '#B31312']; //5D9C59 const u = 2; // unit const wu = 340; // no. units on width const hu = 350; // 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_y(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":1701601766822.734,"size":1000002}] 2f:{"id":"9a628b8ea99a52d0","slug":null,"title":"Piangle for Claire & Yann (diagonal)","thumbnail":"0658198568eefd593e46e37488655ee481637701c1170c9b3b60315095349872","access_level":"public","create_time":"$D2023-12-03T11:09:26.822Z","update_time":"$D2025-08-13T14:18:01.837Z","view_time":null,"first_public_time":"$D2023-12-03T11:09:26.822Z","fork":{"id":"33abcebf4e1e8dca","slug":null,"title":"Piangle for Hinda & Ays (diagonal)","owner":{"id":"5d9b00b2cdcd8028","login":"emma-ba","name":""}},"stars":0,"starred":false,"owner":{"type":"team","id":"5d9b00b2cdcd8028","login":"emma-ba","name":"","avatar_url":"https://avatars-next.observableusercontent.com/3950b079ad1fc587c84ccfe712c3cc77ad1e122194ac7deeaf2ea35c7bf0f25a","tier":"starter_2024"},"version":2987,"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"}],"comments":[],"custom_thumbnail":false,"trashed":false,"lapsed":null,"subscribed":null,"forks":2,"collection":{"id":"eb707ad90c7cf937","slug":"piangles","title":"Piangles","owner":{"id":"5d9b00b2cdcd8028","login":"emma-ba","name":""}},"type":"notebook","body":{"title":"Piangle for Claire & Yann (diagonal)","cells":[{"id":0,"value":"# Piangle for Claire & Yann (diagonal)\n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","output":"","database":"$undefined"},{"id":2429,"value":"$31","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":167,"value":"$32","pinned":true,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":170,"value":"algo_hinda = (l, r) => {\n let modulo = 10;\n let thres = 14;\n let power = 2;\n let shift_digit = 1;\n \n let sum = l + r;\n let new_d = sum;\n \n new_d = Math.min( new_d, thres);\n new_d = Math.abs(new_d);\n new_d = new_d**(1/power);\n new_d = new_d * (10**shift_digit);\n new_d = Math.trunc(new_d);\n \n return new_d % modulo;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","output":"$undefined","database":"$undefined"},{"id":305,"value":"algo_y = (l, r) => { \n let power = 3;\n let thres = 8**power;\n let rep_p = 4;\n let rep_n = 4;\n \n let new_d = (l**power) - (r**power);\n \n if(new_d == 0){new_d = l;}\n if(new_d > thres){new_d = rep_p;}\n if(new_d < -1*thres){new_d = rep_n;}\n new_d = Math.abs(new_d);\n \n return new_d % 10;\n}","pinned":true,"hidden":false,"mode":"ojs","author":"$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"