levelsio

        if (new URLSearchParams(window.location.search).get('portal')) {
            // <create start portal>
                // Create portal group to contain all portal elements
                const startPortalGroup = new THREE.Group();
                startPortalGroup.position.set(SPAWN_POINT_X, SPAWN_POINT_Y, SPAWN_POINT_Z);
                startPortalGroup.rotation.x = 0.35;
                startPortalGroup.rotation.y = 0;

                // Create portal effect

krossford

private func createTexture(sampleBuffer: CMSampleBuffer, planeIndex: Int, pixelFormat: MTLPixelFormat) throws -> MTLTexture {
    guard let cvImageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer) else {
        throw MyError.normal
    }
    let isPlanar = CVPixelBufferIsPlanar(cvImageBuffer)
    let width = isPlanar ? CVPixelBufferGetWidthOfPlane(cvImageBuffer, planeIndex) : CVPixelBufferGetWidth(cvImageBuffer)
    let height = isPlanar ? CVPixelBufferGetHeightOfPlane(cvImageBuffer, planeIndex) : CVPixelBufferGetHeight(cvImageBuffer)

    var cvMetalTexture: CVMetalTexture?
    CVMetalTextureCacheCreateTextureFromImage(nil, _textureCache!, cvImageBuffer, nil, pixelFormat, width, height, planeIndex, &cvMetalTexture)

bricklife

System

{"i":"EMWW","m":"get_firmware_info","p":{}}
{"m":"trigger_current_state","p":{}}
{"m":"program_modechange","p":{"mode":"play"}} // "mode": "play" or "download"
{"i":"ESGe","m":"set_hub_name","p":{"name":"U1BJS0U="}} // "name": Base64 string

Motor

mikhailov-work

// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

// Polynomial approximation in GLSL for the Turbo colormap
// Original LUT: https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f

// Authors:
//   Colormap Design: Anton Mikhailov ([email protected])
//   GLSL Approximation: Ruofei Du ([email protected])

numist

// What is an alias method?

// If we have a list of elements with different frequencies,
// like the letters in the English language… 
let frequencies = [
    ("a", 8.167), ("b", 1.492), ("c", 2.782), ("d", 4.253), ("e", 12.702),
    ("f", 2.228), ("g", 2.015), ("h", 6.094), ("i", 6.966), ("j", 0.153),
    ("k", 0.772), ("l", 4.025), ("m", 2.406), ("n", 6.749), ("o", 7.507),
    ("p", 1.929), ("q", 0.095), ("r", 5.987), ("s", 6.327), ("t", 9.056),
    ("u", 2.758), ("v", 0.978), ("w", 2.360), ("x", 0.150), ("y", 1.974),

yohhoy

Y  = a * R + b * G + c * B
Cb = (B - Y) / d
Cr = (R - Y) / e

	BT.601	BT.709	BT.2020
a	0.299	0.2126	0.2627
b	0.587	0.7152	0.6780

mayoff

The attached lldb command pblock command lets you peek inside an Objective-C block. It tries to tell you where to find the source code for the block, and the values captured by the block when it was created.

Consider this example program:

#import <Foundation/Foundation.h>

@interface Foo: NSObject
@end

@implementation Foo

NSProgrammer

legacy = UIGraphicsBeginImageContextWithOptions + UIGraphicsEndImageContext

modern = UIGraphicsImageRendererFormat + UIGraphicsImageRenderer

Take aways:

• "modern" w/ prefersExtendedRange = NO
  • basically the same perf as "legacy"
  • probably a good idea to adopt since optimizations will likely be in "modern" first
• "modern" w/ prefersExtendedRange = YES

lukevanin

//
//  ============================================================================
//
//  Quick sketch / rough idea of a redux store/state/action/reducer pattern.
//
//  This works differently to ReduxJS, in that the reducer does not implement a
//  switch statement for the action, but instead uses a double-dispatch
//  functional call from the action to a factory that produces the redicer.
//. The store also has methods for each action type.
//

lattner

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

Contents

• Introduction
• Overall Vision