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const rotate2D = Fn(({pos,angle})=>{
  const s = sin(angle);
  const c = cos(angle);
  const m = mat2(c, s, s.mul(-1), c);
  return m.mul(pos);
})

const rotate3D = Fn(({pos,axis,angle})=>{
  const axisNorm = normalize(axis);
  const s = sin(angle);

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Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

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float fixedpow(float a, float x)
{
    return pow(abs(a), x) * sign(a);
}

float cbrt(float a)
{
    return fixedpow(a, 0.3333333333);
}

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#define PI 3.1415926538

const float EPS = 0.001;
vec4 mod289(vec4 x) {
    return x - floor(x * (1.0 / 289.0)) * 289.0;
}
float mod289(float x) {
    return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec4 permute(vec4 x) {

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//
// GLSL textureless classic 3D noise "cnoise",
// with an RSL-style periodic variant "pnoise".
// Author:  Stefan Gustavson (stefan.gustavson@liu.se)
// Version: 2011-10-11
//
// Many thanks to Ian McEwan of Ashima Arts for the
// ideas for permutation and gradient selection.
//
// Copyright (c) 2011 Stefan Gustavson. All rights reserved.

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var     express = require('express'),
        app = express(),
        https = require('https'),
        fs = require('fs'),
        keys = require( "keygrip" )(['secret1', 'secret2']),
        cookies = require( "cookies" );

// This line is from the Node.js HTTPS documentation
var options = {
  key: fs.readFileSync('private_key_cert.pem'),

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The Ultimate Unit Testing Cheat-sheet

For Mocha, Chai and Sinon

using mocha/chai/sinon for node.js unit-tests? check out my utility: mocha-stirrer to easily reuse test components and mock require dependencies

---

• Sinon Chai
• Chai
• Sinon
• Mocha

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// the main app file
import express from "express";
import loadDb from "./loadDb"; // dummy middleware to load db (sets request.db)
import authenticate from "./authentication"; // middleware for doing authentication
import permit from "./permission"; // middleware for checking if user's role is permitted to make request

const app = express(),
      api = express.Router();

// first middleware will setup db connection

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C++ Pointer Tutorial

Because pointers can be ugh

"Regular" variables (not pointers)

To understand a pointer, let's review "regular" variables first. If you're familiar with a programming language without pointers like JavaScript, this is what you think when you hear "variable".

When declaring a variable by identifier (or name), the variable is synonymous with its value.

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export PATH=/opt/homebrew/bin:$PATH

# If you come from bash you might have to change your $PATH.
# export PATH=$HOME/bin:/usr/local/bin:$PATH

# Path to your oh-my-zsh installation.
export ZSH="$HOME/.oh-my-zsh"

# Set name of the theme to load --- if set to "random", it will
# load a random theme each time oh-my-zsh is loaded, in which case,