Tonis tonis2

Demystifying Rotational Dynamics in Rigid Bodies

Rigid bodies mainly have 6 degrees of freedom in 3 dimensions (3 translational and 3 rotational), you can represent the particles as rigid bodies with only 3 translational degrees which is straightforward and their equations of motion aren't difficult to formalize, but what if you want to extend from particles to much more than that? Say... system of particles connected to each other to create a whole body!

First, let's suppose you have two particles, one that has an infinite mass which cannot represent motion unless an infinite force is applied, and the other one which has some finite amount of mass which is able to move around, but now let's actually link them together by a massless rigid rod or an infinitely stiff spring like so

Here because the rigid rod is infinitely stiff and

This project is a tiny compiler for a very simple language consisting of boolean expression.

The language has two constants: 1 for true and 0 for false, and 4 logic gates: ! (not), & (and), | (or), and ^ (xor).

It can also use parentheses to manage priorities.

Here is its grammar in BNF format:

expr ::= "0" | "1"

Programming as Theory Building

Peter Naur

Peter Naur's classic 1985 essay "Programming as Theory Building" argues that a program is not its source code. A program is a shared mental construct (he uses the word theory) that lives in the minds of the people who work on it. If you lose the people, you lose the program. The code is merely a written representation of the program, and it's lossy, so you can't reconstruct

Autoupdates for Electron App

This guide will show you how to prepare sample Electron application for publishing from scratch:

create a new app
build distos
publish release to GitHub
set up autoupdating

Your app's updates may be stored on GitHub repo's releases page. It is free and user-friendly.

	<!DOCTYPE html>
	<html lang="en">

	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>My Angular from Scratch</title>
	<style>
	.my-component {
	font-family: Arial, sans-serif;

	import 'package:flutter/material.dart';

	extension BuildContextExtensions on BuildContext {
	ThemeData get theme => Theme.of(this);

	TextTheme get textTheme => theme.textTheme;

	ColorScheme get colorScheme => theme.colorScheme;

	DefaultTextStyle get defaultTextStyle => DefaultTextStyle.of(this);

	// How to build:
	// # compile the metal shaders
	// xcrun -sdk macosx metal -c shaders.metal -o shaders.air
	// xcrun -sdk macosx metallib shaders.air -o shaders.metallib
	// # compile the c file
	// clang app_metal.c -framework Cocoa -framework Metal -o metal_c.app
	//
	//
	// Draw a triangle using metal
	// Metal tutorial followed here: https://www.raywenderlich.com/7475-metal-tutorial-getting-started

	version: '3.2'

	services:
	agent:
	image: portainer/agent
	environment:
	# REQUIRED: Should be equal to the service name prefixed by "tasks." when
	# deployed inside an overlay network
	AGENT_CLUSTER_ADDR: tasks.agent
	# AGENT_PORT: 9001

	node_modules
	dist/
	yarn.lock
	wwwroot

	var str = 'class ಠ_ಠ extends Array {constructor(j = "a", ...c) {const q = (({u: e}) => {return { [`s${c}`]: Symbol(j) };})({});super(j, q, ...c);}}' +
	'new Promise((f) => {const a = function* (){return "\u{20BB7}".match(/./u)[0].length === 2 \|\| true;};for (let vre of a()) {' +
	'const [uw, as, he, re] = [new Set(), new WeakSet(), new Map(), new WeakMap()];break;}f(new Proxy({}, {get: (han, h) => h in han ? han[h] ' +
	': "42".repeat(0o10)}));}).then(bi => new ಠ_ಠ(bi.rd));';

	try {
	eval(str);
	} catch(e) {
	alert('Your browser does not support ES6!')
	}