autumn

[github]

the leaf with a slash for its vein, glinting now and then

companies 29×28 30 fps in colour or one ink 4.5 kB [report a bug]

use it

html

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

<ascii-art piece="autumn" options='{"shine":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="autumn" mono>, for one ink.

react

// npm install ascii.rest
import { Ascii } from "ascii.rest/react";
import { autumn } from "ascii.rest/pieces";

<Ascii piece={autumn} options={{"shine":5}} />

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

astro

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

<Ascii piece="autumn" options={{"shine":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 ascii.rest
import { mount } from "ascii.rest";
import { autumn } from "ascii.rest/pieces";

const el = document.querySelector<HTMLCanvasElement>("canvas")!;
const stop = mount(el, autumn, {"shine":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.

terminal

npx ascii.rest autumn

Plays it in your terminal, in colour, until you press a key. Add --mono for the terminal's own colour. Add --light for a light terminal. Add --seconds 5 to stop it on its own; npx ascii.rest list shows every piece. In a CLI of your own, play("autumn", { seconds: 2 }) from ascii.rest/terminal shows it as a splash screen.

readme

<picture>
  <source media="(prefers-color-scheme: dark)" srcset="https://ascii.rest/svg/autumn.dark.svg">
  <img alt="autumn" src="https://ascii.rest/svg/autumn.svg" width="145">
</picture>
autumn, as a light README shows it
light, autumn.svg
autumn, as a dark README shows it
dark, autumn.dark.svg

An animated SVG that needs no script, so it plays in a GitHub README, which runs none. GitHub shows the dark one in its dark theme. It holds still for anyone who prefers reduced motion.

autumn.ts

[js] [github] 
/*
 * autumn: the Autumn logo, a leaf with a slash for its vein, with a glint
 * crossing it every few seconds.
 *
 * Drawn from the leaf in Autumn's own logo, from useautumn.com: 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 is black, and a light grey on a
 * dark page, where black 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 company.
 */
import type { Frame, Meta } from "../types.ts";

export interface AutumnOptions {
  [key: string]: unknown;
  /** Seconds between glints; 0 keeps the logo still. */
  shine: number;
}

export const meta = {
  name: "autumn",
  category: "companies",
  note: "the leaf with a slash for its vein, glinting now and then",
  cols: 29,
  rows: 28,
  fps: 30,
  options: { shine: 5 },
  // The logo's colour for a light page, then for a dark one; each as drawn, then twice lighter for the glint.
  palette: [
    "#000000", "#595959", "#b3b3b3", "#e8ebef", "#f0f2f5", "#f8f9fa",
  ],
} satisfies Meta<AutumnOptions>;

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





                      ._ppp
                  __p88888b
             ._pp888888888b
         __p88888888888888b
       q888888888888888888b
      \8888888888888888888b
     _88888888888\88888888b
    _8888888888P\888888888b
   .8888888888"_8888888888b
   p88888888P'q88888888888b
  d88888888" q888888888888b
   "88888P  p8888888888888"
    '888" .p8888888888P"'
      "  _p88888888P"
        _8888888P"
       _8888P"'
      )88P"
     )P"





`;

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





                      ._ppp
                  __p88888b
             ._pp888888888b
         __p88888888888888b
       q888888888888888888b
      \8888888888888888888b
     _88888888888\88888888b
    _8888888888P\888888888b
   .8888888888"_8888888888b
   p88888888P'q88888888888b
  d88888888" q888888888888b
   "88888P  p8888888888888"
    '888" .p8888888888P"'
      "  _p88888888P"
        _8888888P"
       _8888P"'
      )88P"
     )P"





`;
const INK = String.raw`





                      00000
                  000000000
             00000000000000
         000000000000000000
       00000000000000000000
      000000000000000000000
     0000000000000000000000
    00000000000000000000000
   000000000000000000000000
   000000000000000000000000
  0000000000 00000000000000
   0000000  000000000000000
    00000 000000000000000
      0  000000000000
        0000000000
       00000000
      00000
     000





`;

const START = 0.5; // seconds before the first glint
const PASS = 2; // seconds a glint takes to cross
const HALF = 5; // half its width, in cells
const LEAN = 0.9; // cells it shifts left a row down, so it leans like a slash
const SOLID = "8dbqpPYOo0"; // what the glint turns to slashes; thin edges keep their shape

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

export default function autumn({ shine = meta.options.shine }: Partial<AutumnOptions> = {}): Frame {
  const { cols, rows } = meta;
  const mono = lines(MONO), art = lines(ART), ink = lines(INK);
  const n = meta.palette.length / 6;
  const every = shine > 0 ? Math.max(shine, PASS + 0.5) : 0;
  // The glint crosses the logo's ink, edge to edge, rather than the whole frame.
  let lo = Infinity, hi = -Infinity;
  for (const pic of [mono, art])
    pic.forEach((line, y) => {
      for (let x = 0; x < cols; x++) if (line[x] !== " ") (lo = Math.min(lo, x + LEAN * y)), (hi = Math.max(hi, x + LEAN * y));
    });
  const span = hi - lo + 2 * HALF;

  return (t, { paper = false, color } = {}) => {
    const pic = color ? art : mono;
    const since = t - START;
    const at = every && since >= 0 ? lo - HALF + (span * (since % every)) / PASS : -Infinity;
    const out: string[] = [];
    for (let y = 0; y < rows; y++) {
      let line = "";
      for (let x = 0; x < cols; x++) {
        let ch = pic[y][x];
        if (ch !== " ") {
          const d = Math.abs(x + LEAN * y - at);
          let k = d < HALF ? 1 - d / HALF : 0;
          k = k * k * (3 - 2 * k);
          if (k > 0.55 && SOLID.includes(ch)) ch = "/";
          if (color) color[y * cols + x] = (paper ? 0 : 3 * n) + (k > 0.6 ? 2 : k > 0.25 ? 1 : 0) * n + parseInt(ink[y][x], 36);
        }
        line += ch;
      }
      out.push(line);
    }
    return out.join("\n");
  };
}