AKosmachyov

3D Function Description

dot - скалярное произведение wiki, Khan Academy

$\vec{a} \cdot \vec{b} = | \vec{a} | | \vec{b} | \cos(\theta)$

Where

• $| \vec{a} |, | \vec{b} |$ - magnitudes/lengths
• $\theta$ - is the angle between $\vec{a}$ and $\vec{b}$

Результат dot для 2 нормализированных векторов, отображает их сонаправленность:

AKosmachyov

import {
    WebGLRenderer,
    Scene,
    PerspectiveCamera,
    Vector3,
    LineBasicMaterial,
    Clock,
    Group,
    AnimationMixer,
    BufferGeometry,

AKosmachyov

/*
 *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
 *  https://github.com/webrtc/apprtc/blob/78600dbe205774c115cf481a091387d928c99d6a/src/web_app/js/stats.js#L67
 */

'use strict';

AKosmachyov

Xcode:

1. Product (on the top menu) -> Archive
2. Window -> Organizer
3. Select archive
4. Distribute App
5. Developemnt enter app url: https:///apps/.ipa enter dispaly image url: https:///apps/57x57.png enter full size image url: https:///apps/512x512.png
6. Move Apps folder from the Archive folder to the server.js folder

AKosmachyov

Video from jsturgis gist

AKosmachyov

1. Create file san.cnf

[ req ]
default_bits        = 2048
distinguished_name  = req_distinguished_name
req_extensions      = SAN
extensions          = SAN
[ req_distinguished_name ]
countryName         = BY
stateOrProvinceName = Minsk

AKosmachyov

iOS

• Обучение на приложениях от Apple
• UIKit, SwiftUI от Apple

AKosmachyov

The architectures can be shown using lipo -i

$ xcrun lipo -i INSCoreMedia.framework/INSCoreMedia
# Architectures in the fat file: INSCoreMedia.framework/INSCoreMedia are: armv7 i386 x86_64 arm64 

• arm64 - is the current 64-bit ARM CPU architecture, as used since the iPhone 5S and later (6, 6S, SE and 7), the iPad Air, Air 2 and Pro, with the A7 and later chips.
• armv7s - being used in Apple's A6 and A6X chips on iPhone 5, iPhone 5C and iPad 4.
• armv7 - an older variation of the 32-bit ARM CPU, as used in the A5 and earlier.
• i386 - (i.e. 32-bit Intel) is the only option on iOS 6.1 and below.

AKosmachyov

• 30 tips
• Swift Method Dispatch
• pthread, Thread, RunLoop - ru
• Grand Central Dispatch - ru

Animations

• Difference
• Core Animation - ru
• UIView animation
• animateWithDuration(duration, animations, completion)

AKosmachyov

const http = require('http');
const fs = require('fs');
const path = require('path');
const PORT = process.env.PORT || 8125;

http.createServer(function (request, response) {
    logRequest(request);

    var filePath = '.' + request.url;
    if (filePath == './') {