janispritzkau’s gists

janispritzkau / game-of-life.html

Last active August 21, 2019 18:42

Code golf: Game of Life (286 bytes)

<canvas id="c"><script>t=c.getContext("2d"),s=150,a=[];for(i=s*s;i--;)a[i]=Math.random()<.1;setInterval(_=>{b=[],t.clearRect(0,0,s,s);for(i=s*s;i--;){n=0;for(j=9;j--;)n+=a[(~~(i/s)+s+j%3-1)%s*s+(i+s+~~(j/3)-1)%s];b[i]=n==3||n-a[i]==3,a[i]&&t.fillRect((i%s),~~(i/s),1,1)}a=b},s)</script>

janispritzkau / webgl-example.js

Last active June 15, 2023 08:35

Simple WebGL example with basic error handling

	const canvas = document.querySelector("canvas")
	canvas.width = 800, canvas.height = 600
	canvas.style.width = `${canvas.width / devicePixelRatio}px`

	const gl = canvas.getContext("webgl")

	const vertexShader = gl.createShader(gl.VERTEX_SHADER)
	const fragmentShader = gl.createShader(gl.FRAGMENT_SHADER)

	gl.shaderSource(vertexShader, `

janispritzkau / index.html

Last active November 1, 2019 16:28

Rendering area chart with WebGL (1 million points)

	<!DOCTYPE html>
	<meta name="viewport" content="width=device-width, initial-scale=1.0">

	<title>WebGL Chart</title>

	<span id="fps">Loading</span>
	<canvas></canvas>

	<style>
	body {

janispritzkau / analytics.js

Last active April 5, 2022 17:51

Minimal Google Analytics Script (677 bytes minified)

	((document, location, navigator) => {
	const domain = location.hostname.split(".")
	const match = document.cookie.match(/(^\|; ?)_ga=GA1\.\d\.(\d+\.\d+)(;\|$)/)

	// use existing client id or generate one
	const cid = match ? match[2] : ~~(2147483648 * Math.random()) + "." + ~~(Date.now() / 1000)

	// set cookie at highest possible domain level
	for (let i = domain.length; i--;) {
	const cookie = `_ga=GA1.${domain.length - i}.${cid}`

janispritzkau / ejs.ts

Created April 25, 2021 21:34

Deno EJS Template Engine

	import { dirname, extname, resolve } from "https://deno.land/std/path/mod.ts";

	const MODE_EVAL = 0;
	const MODE_ESCAPED = 1;
	const MODE_RAW = 2;

	interface Range {
	source: [number, number];
	code: [number, number];
	}

janispritzkau / auth.ts

Last active June 9, 2023 14:38

Minecraft Microsoft/Mojang Account Authentication (JavaScript)

	export const MSAL_OAUTH_URL =
	"https://login.microsoftonline.com/consumers/oauth2/v2.0";

	export const MSAL_OAUTH_DEVICE_AUTHORIZATION_ENDPOINT =
	`${MSAL_OAUTH_URL}/devicecode`;

	export const MSAL_OAUTH_TOKEN_ENDPOINT = `${MSAL_OAUTH_URL}/token`;

	export const XBOX_AUTH_ENDPOINT =
	"https://user.auth.xboxlive.com/user/authenticate";

janispritzkau / sungrow_sh10rt_modbus.yaml

Created August 9, 2022 09:48

Modbus Registers for Sungrow SH10RT Hybrid Inverter

	input_registers:
	- name: protocol_number
	data_type: uint32
	address: 4950
	- name: protocol_version
	data_type: uint32
	address: 4952
	- name: arm_software_version
	data_type: string
	address: 4954

janispritzkau / iso_weeks.sql

Created August 25, 2022 19:39

Start date and week count for first calendar week of year (PostgreSQL)

	SELECT
	year,
	date_trunc('week', make_date(year, 1, 4))::date AS start, -- first calendar week always contains January 4th.
	extract(week from make_date(year + 1, 1, 4) - 7) AS weeks
	FROM generate_series(2000, 2030) t(year);

janispritzkau / aes_128_cfb8.ts

Created November 8, 2022 13:56

Deno AES-128-CFB8 encryption using OpenSSL and FFI

	const lib = Deno.dlopen(
	Deno.env.get("DENO_SSL_PATH")!,
	{
	AES_set_encrypt_key: {
	parameters: ["buffer", "u32", "buffer"],
	result: "i32",
	},
	AES_cfb8_encrypt: {
	parameters: [
	"buffer",

janispritzkau / auth_puppeteer.ts

Last active November 13, 2022 19:28

Minecraft OAuth authentication using Puppeteer

	#!/usr/bin/env -S deno run -A

	// you might need to specify a different chrome executable because of a bug
	// https://github.com/lucacasonato/deno-puppeteer/issues/65
	// PUPPETEER_EXECUTABLE_PATH=/usr/bin/google-chrome-stable (on my linux system)

	import { OAuthClient } from "https://deno.land/x/[email protected]/auth/mod.ts";
	import puppeteer from "https://deno.land/x/[email protected]/mod.ts";

	const oauthClient = new OAuthClient({

Janis Pritzkau janispritzkau