fschr

// SDL2 Hello, World!
// This should display a white screen for 2 seconds
// compile with: clang++ main.cpp -o hello_sdl2 -lSDL2
// run with: ./hello_sdl2
#include <SDL2/SDL.h>
#include <stdio.h>

#define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480

blahah

Making an Electron app and want to embed a database? Here's a table to help you choose the right database software.

Work in progress

Project	Language	NPM package?	Flat file?	In memory?	Full-text search?	Maturity	Embedded size	Dependencies
NeDB	Javascript		Yes	Always	No	High	Low	Simple
Lunr	Javascript		No	Yes	Yes	High	Tiny	None
Search-index	Javascript
Sqlite3	C		Yes	No	Yes (fts extens

paiv

//
// MathCalc: a parser for basic mathematical expressions
// From here: https://paiv.github.io/blog/2016/03/23/js-calc.html
//
//
// Copyright (c) 2016, Pavel Ivashkov, github.com/paiv
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.

william-silversmith

/* springFactory
 *
 * Generate a physically realistic easing curve for a damped mass-spring system.
 *
 * Required:
 *   damping (zeta): [0, 1)
 *   halfcycles: 0...inf
 *
 * Optional:
 *   initial_position: -1..1, default 1

william-silversmith

/* sigmoidFactory
 *
 * Generate an ease-in-out function with desired steepness.
 * Accompanying article: https://medium.com/analytic-animations/ease-in-out-the-sigmoid-factory-c5116d8abce9
 *
 * Required:
 *   k: (float != 0), sharpness of ease
 *
 * Return: f(t), t in 0..1
 */

cauerego

// quite untested, adapted from BigstickCarpet's gist, attempt to make it simpler to use

function openIndexedDB (fileindex) {
  // This works on all devices/browsers, and uses IndexedDBShim as a final fallback 
  var indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB;

  var openDB = indexedDB.open("MyDatabase", 1);

  openDB.onupgradeneeded = function() {
    var db = {}

william-silversmith

/* bounceFactory
 *
 * Consult this article: https://medium.com/@willsilversmith/the-bounce-factory-3498de1e5262#.pn5rcjp15
 * The variables below are annotate with comments that reference the article.
 *
 * Simulate a physical bouncing motion based on physics equations of motion.
 *
 * We assume mass and gravity = 1 as they are immaterial when we normalize both
 * the y and t axis to 1. The length of the animation in msec will determine "gravity"
 * and the elasticity will determine the number of bounces.

SleepWalker

var touchstartX = 0;
var touchstartY = 0;
var touchendX = 0;
var touchendY = 0;

var gesuredZone = document.getElementById('gesuredZone');

gesuredZone.addEventListener('touchstart', function(event) {
    touchstartX = event.screenX;
    touchstartY = event.screenY;

wilsonpage

function Storage(name) {
  this.ready = new Promise((resolve, reject) => {
    var request = window.indexedDB.open(location.origin);

    request.onupgradeneeded = e => {
      this.db = e.target.result;
      this.db.createObjectStore('store');
    };

    request.onsuccess = e => {

william-silversmith

/* Example animation function 
 * 
 * Interpolate between a start and end position.
 *
 * obj.x represents a position parameter (e.g. 12.2)
 * end_pos is the value obj.x will have at the end of the animation
 * msec is the number of milliseconds we want to run the animation for
 * easing is a timing function that accepts a number between 0 to 1 
 *    and returns the proportion of the interpolation between start and end to move the object to. 
 *