ktcy / webrtc-client.js

Last active November 27, 2018 11:12

WebRTC sample

	const clientList = document.getElementById('client-list');
	const mainVideo = document.getElementById('main-video');

	mainVideo.addEventListener('loadedmetadata', () => {
	const {videoWidth, videoHeight} = mainVideo;
	const longest = Math.max(videoWidth, videoHeight);
	const size = 300;

	mainVideo.width = size * videoWidth / longest;
	mainVideo.height = size * videoHeight / longest;

ktcy / silence.js

Created October 24, 2018 10:20

Create WAV file containing only silence

	function createSilence(seconds = 1) {
	const sampleRate = 8000;
	const numChannels = 1;
	const bitsPerSample = 8;

	const blockAlign = numChannels * bitsPerSample / 8;
	const byteRate = sampleRate * blockAlign;
	const dataSize = Math.ceil(seconds * sampleRate) * blockAlign;
	const chunkSize = 36 + dataSize;
	const byteLength = 8 + chunkSize;

ktcy / index.html

Last active July 10, 2019 23:52

Spotify API Authorization

	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8">
	<title>Example of the Authorization Code flow with Spotify</title>
	<style type="text/css">
	#login, #loggedin {
	display: none;
	}
	.text-overflow {

ktcy / circumcircle.js

Created April 20, 2017 09:03

Circumcircle from three points

	function circumcircle(point0, point1, point2) {
	const x1 = point1.x - point0.x;
	const y1 = point1.y - point0.y;
	const x2 = point2.x - point0.x;
	const y2 = point2.y - point0.y;
	const k = 2 * (x1 * y2 - y1 * x2);

	if (k === 0) {
	return null;
	}

ktcy / generate-android-image-assets.md

Last active February 26, 2016 09:19

Default settings to generate image assets for Android

Create empty layer and name it:

default 100% drawable-mdpi/ + 150% drawable-hdpi/ + 200% drawable-xhdpi/ + 300% drawable-xxhdpi/

Reference:

ktcy / CubicBezier.es6.js

Created September 18, 2015 11:35

CSS `cubic-bezier()` timing function

	'use strict';

	export default function cubicBezier(x1, y1, x2, y2) {
	let ax, bx, cx, ay, by, cy;

	ax = 3 * (x1 - x2) + 1;
	bx = 3 * x2 - 6 * x1;
	cx = 3 * x1;

	ay = 3 * (y1 - y2) + 1;

ktcy / UnitBezier.es6.js

Created September 18, 2015 11:33

	'use strict';

	/*
	* Copyright (C) 2008 Apple Inc. All Rights Reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.

ktcy / invpath

Last active August 29, 2015 14:27

$ invpath <path>

	#!/usr/bin/env node

	getOptions(function(options) {
	if (!options.path) {
	console.log('Usage: invpath <path>');
	process.exit(0);
	}

	var path = options.path.trim();
	var type = guess(path);

ktcy / toremote

Last active August 29, 2015 14:27

$ toremote [--mac] [--windows] [path]

	#!/usr/bin/env node

	try {

	var args = parseArguments();

	if (args.help) {
	console.log('Usage: toremote [--mac] [--windows] [path]');
	process.exit(0);
	}

ktcy / gaussian-elimination.js

Created February 16, 2014 13:04

	function gaussianElimination(matrix) {
	var pivot, base, col, div, mul, v, n, i, j;

	n = matrix.length;

	// Forward Elimination

	for (pivot = 0; pivot < n - 1; pivot++) {
	swap(matrix, pivot);
	base = matrix[pivot];

Keishi Tsuchiya ktcy