endeavouros

[github]

the violet sail, scanned now and then

distros 67×28 30 fps in colour or one ink 7.9 kB

use it

html

<script type="module" src="https://ascii.rest/ascii.js"></script>

<ascii-art piece="endeavouros" options='{"scan":5}'></ascii-art>

No install and no build step. ascii.js defines the <ascii-art> tag, loads the piece from ascii.rest, plays it while it is on screen, and holds the first frame for anyone who prefers reduced motion. Add mono, <ascii-art piece="endeavouros" mono>, for one ink.

react

// npm install github:bas3line/ascii
import { Ascii } from "ascii.rest/react";
import { endeavouros } from "ascii.rest/pieces";

<Ascii piece={endeavouros} options={{"scan":5}} />

A client component, so it works in the Next.js app router as it is. Pass the name instead, piece="endeavouros", to fetch the piece only when it mounts. Add mono for one ink.

astro

---
// npm install github:bas3line/ascii
import Ascii from "ascii.rest/astro";
---

<Ascii piece="endeavouros" options={{"scan":5}} />

Renders the first frame on the server, so the page is whole before any script runs, then plays the piece once it loads. Add mono for one ink.

typescript

// npm install github:bas3line/ascii
import { mount } from "ascii.rest";
import { endeavouros } from "ascii.rest/pieces";

const el = document.querySelector<HTMLCanvasElement>("canvas")!;
const stop = mount(el, endeavouros, {"scan":5});

mount plays a piece in a <pre>, or on a <canvas> for the coloured ones, and returns a function that stops it. Every piece, option and frame is typed. Mount it in a <pre> for one ink.

endeavouros.ts

[js] [github] 
/*
 * endeavouros: the EndeavourOS logo, a sail, with a scan line running down it
 * every few seconds that scrambles what it passes.
 *
 * Drawn from Simple Icons' endeavouros.svg (CC0): each cell holds the
 * character whose shape best matches the logo's edge through it, and 8 where
 * the logo is solid. On a canvas it takes the logo's colours, lifted on a dark
 * page where they would sink into it; in a <pre> it is one ink, from the same
 * drawing. The logo is a trademark of its owner, shown here to name the
 * distribution.
 */
import type { Frame, Meta } from "../types.ts";

export interface EndeavourosOptions {
  [key: string]: unknown;
  /** Seconds between scans; 0 keeps the logo still. */
  scan: number;
}

export const meta = {
  name: "endeavouros",
  category: "distros",
  note: "the violet sail, scanned now and then",
  cols: 67,
  rows: 28,
  fps: 30,
  options: { scan: 5 },
  // The logo's colour for a light page, then for a dark one; each as drawn, then twice lighter for the scan.
  palette: [
    "#7f7fff", "#acacff", "#d9d9ff", "#7f7fff", "#acacff", "#d9d9ff",
  ],
} satisfies Meta<EndeavourosOptions>;

// In a <pre>, in the page's own colour.
const MONO = String.raw`

                                     ,':,
                                   _(_pp'\,
                                 _p"_888q,)q,
                               _pP'p888888_"8p
                             .p8P_p88888888q,Y8_
                            _88"_888888888888,"8q,
                          _p8P'q88888888888888p'88q,
                        _p88P.p8888888888888888q,888_
                       q888"_8888888888888888888q,Y88q,
                     _p888")8888888888888888888888,"888_
                   _p888P'q888888888888888888888888,"888q
                  q8888P_p88888888888888888888888888,"888q,
                _88888"_88888888888888888888888888888,"8888,
              _p88888")8888888888888888888888888888888,)8888p
             q88888P'q88888888888888888888888888888888b 88888p
           _p88888P.p8888888888888888888888888888888888p'88888p
         _p888888"_8888888888888888888888888888888888888,d88888,
        _8888888"_88888888888888888888888888888888888888||888888,
      _p888888P'q888888888888888888888888888888888888888P:888888p
    .p8888888P.p8888888888888888888888888888888888888888||888888b
   _88888888P_88888888888888888888888888888888888888888P.d8888888
  "Y8888888".O888888888888888888888888888888888888888P"_p8888888(
         _pqqqqqqq________""""""^YYPPP8888888888PP""_pp88888888P
        _888888888888888888888888qqqqqqqqqqqqqpppq88888888888P'
       q8888888888888888888888888888888888888888888888888P""
      d8888888888888888888888888888888888PPPP^"""""''

`;

// On a canvas, and the colour of each cell: an index into the logo's colours.
const ART = String.raw`

                                     ,':,
                                   _(_pp'\,
                                 _p"_888q,)q,
                               _pP'p888888_"8p
                             .p8P_p88888888q,Y8_
                            _88"_888888888888,"8q,
                          _p8P'q88888888888888p'88q,
                        _p88P.p8888888888888888q,888_
                       q888"_8888888888888888888q,Y88q,
                     _p888")8888888888888888888888,"888_
                   _p888P'q888888888888888888888888,"888q
                  q8888P_p88888888888888888888888888,"888q,
                _88888"_88888888888888888888888888888,"8888,
              _p88888")8888888888888888888888888888888,)8888p
             q88888P'q88888888888888888888888888888888b 88888p
           _p88888P.p8888888888888888888888888888888888p'88888p
         _p888888"_8888888888888888888888888888888888888,d88888,
        _8888888"_88888888888888888888888888888888888888||888888,
      _p888888P'q888888888888888888888888888888888888888P:888888p
    .p8888888P.p8888888888888888888888888888888888888888||888888b
   _88888888P_88888888888888888888888888888888888888888P.d8888888
  "Y8888888".O888888888888888888888888888888888888888P"_p8888888(
         _pqqqqqqq________""""""^YYPPP8888888888PP""_pp88888888P
        _888888888888888888888888qqqqqqqqqqqqqpppq88888888888P'
       q8888888888888888888888888888888888888888888888888P""
      d8888888888888888888888888888888888PPPP^"""""''

`;
const INK = String.raw`

                                     0000
                                   00000000
                                 000000000000
                               000000000000000
                             0000000000000000000
                            0000000000000000000000
                          00000000000000000000000000
                        00000000000000000000000000000
                       00000000000000000000000000000000
                     00000000000000000000000000000000000
                   00000000000000000000000000000000000000
                  00000000000000000000000000000000000000000
                00000000000000000000000000000000000000000000
              00000000000000000000000000000000000000000000000
             000000000000000000000000000000000000000000 000000
           0000000000000000000000000000000000000000000000000000
         0000000000000000000000000000000000000000000000000000000
        000000000000000000000000000000000000000000000000000000000
      00000000000000000000000000000000000000000000000000000000000
    0000000000000000000000000000000000000000000000000000000000000
   00000000000000000000000000000000000000000000000000000000000000
  000000000000000000000000000000000000000000000000000000000000000
         0000000000000000000000000000000000000000000000000000000
        0000000000000000000000000000000000000000000000000000000
       00000000000000000000000000000000000000000000000000000
      00000000000000000000000000000000000000000000000

`;

const START = 0.5; // seconds before the first scan
const PASS = 2; // seconds a scan takes, top to bottom
const HEAD = 2; // rows the line scrambles
const TRAIL = 5; // rows of afterglow behind it
const NOISE = "#$%&*+<=>?@[]{}"; // what the line scrambles the logo into

const lines = (art: string) => art.slice(1, -1).split("\n").map((line) => line.padEnd(meta.cols));

function hash(x: number, y: number, k: number) {
  let h = Math.imul(x, 73856093) ^ Math.imul(y, 19349663) ^ Math.imul(k, 83492791);
  h = Math.imul(h ^ (h >>> 13), 1274126177);
  return (h ^ (h >>> 16)) >>> 0;
}

export default function endeavouros({ scan = meta.options.scan }: Partial<EndeavourosOptions> = {}): Frame {
  const { cols, rows, fps } = meta;
  const mono = lines(MONO), art = lines(ART), ink = lines(INK);
  const n = meta.palette.length / 6;
  const every = scan > 0 ? Math.max(scan, PASS + 0.5) : 0;
  // The line runs from the logo's first row to past its last, rather than the whole frame.
  let first = rows, last = -1;
  for (const pic of [mono, art])
    pic.forEach((line, y) => {
      if (line.trim()) (first = Math.min(first, y)), (last = Math.max(last, y));
    });
  const span = last - first + 1 + HEAD + TRAIL;

  return (t, { paper = false, color } = {}) => {
    const pic = color ? art : mono;
    const since = t - START;
    const at = every && since >= 0 ? first + (span * (since % every)) / PASS : -Infinity;
    const tick = Math.floor((t * fps) / 2); // the noise changes every other frame
    const out: string[] = [];
    for (let y = 0; y < rows; y++) {
      const d = at - y; // rows since the line reached this one
      const level = d >= 0 && d < HEAD ? 2 : d >= HEAD && d < HEAD + TRAIL ? 1 : 0;
      let line = "";
      for (let x = 0; x < cols; x++) {
        let ch = pic[y][x];
        if (ch !== " ") {
          if (level === 2) {
            const h = hash(x, y, tick);
            if (h % 4) ch = NOISE[(h >>> 2) % NOISE.length];
          }
          if (color) color[y * cols + x] = (paper ? 0 : 3 * n) + level * n + parseInt(ink[y][x], 36);
        }
        line += ch;
      }
      out.push(line);
    }
    return out.join("\n");
  };
}