Bartosz Ciechanowski @BCiechanowski Twitter profile

Last Seen Profiles

@angeltheicon

@ribliss2

@pugsocket

@official_In20

@BarneyLUFC21

@europaaircraft

@RyanBrubaker73

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@phillycurrent

@Iris_Descent_

@cheers2winecom

@triffic_stuff_

@a3rsky

Bartosz Ciechanowski

@BCiechanowski

2 years

Mechanical Watch –

Mechanical Watch – Bartosz Ciechanowski

Interactive article explaining how a mechanical watch works.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

4 years

Lights and Shadows –

Lights and Shadows – Bartosz Ciechanowski

Interactive article explaining how lights and shadows behave.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

2 years

Sound –

Sound – Bartosz Ciechanowski

Interactive article explaining how sound works.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

2 years

GPS –

GPS – Bartosz Ciechanowski

Interactive article explaining how GPS works.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

3 years

Cameras and Lenses –

Cameras and Lenses – Bartosz Ciechanowski

Interactive article explaining how cameras and lenses work.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

1 year

Bicycle –

Bicycle – Bartosz Ciechanowski

Interactive article explaining the physics of a bicycle.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

3 years

Internal Combustion Engine –

Internal Combustion Engine – Bartosz Ciechanowski

Interactive article explaining how an internal combustion engine works.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

3 years

Curves and Surfaces –

Curves and Surfaces – Bartosz Ciechanowski

Interactive article explaining how curves and surfaces are modeled.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

2 months

Airfoil –

Airfoil – Bartosz Ciechanowski

Interactive article explaining the physics of an airfoil and what makes airplanes fly

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

5 years

Alpha Compositing –

Alpha Compositing – Bartosz Ciechanowski

Interactive article explaining alpha compositing concepts.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

4 years

Gears –

Gears – Bartosz Ciechanowski

Interactive article explaining how mechanical gears work.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

3 years

Naval Architecture –

Naval Architecture – Bartosz Ciechanowski

Interactive article explaining how ships float and maintain their stability.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

5 years

Earth and Sun –

Earth and Sun – Bartosz Ciechanowski

Interactive article about Earth and Sun.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

5 years

Color Spaces –

Color Spaces – Bartosz Ciechanowski

Interactive article explaining color spaces and how they're used to express color.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

5 years

Exposing Floating Point –

Exposing Floating Point – Bartosz Ciechanowski

In depth explanation of floating point format.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

4 years

Tesseract –

Tesseract – Bartosz Ciechanowski

Interactive article that visualizes a tesseract and the 4th dimension.

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

3 years

I published a little commentary article about my recent "Curves and Surfaces" blog post:

On "Curves and Surfaces" | Bartosz Ciechanowski

Get more from Bartosz Ciechanowski on Patreon

www.patreon.com

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Bartosz Ciechanowski

@BCiechanowski

7 years

PSA: you can assign IOSurfaceRef as CALayer’s ‘contents’ and it will render just fine!

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Bartosz Ciechanowski

@BCiechanowski

2 years

@grishka11 Just by hand!

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Bartosz Ciechanowski

@BCiechanowski

10 years

Exposing NSMutableArray http://t.co/GkYnJfYCu0

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Bartosz Ciechanowski

@BCiechanowski

10 years

I wrote a blog post on GPU powered computation on iOS. Up to 64 times faster than CPU. http://t.co/tvbh1d8aNI

Exploring GPGPU on iOS – Bartosz Ciechanowski

ciechanow.ski

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Bartosz Ciechanowski

@BCiechanowski

5 years

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Bartosz Ciechanowski

@BCiechanowski

2 years

@haritssr No libraries, just hand-coded JS

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Bartosz Ciechanowski

@BCiechanowski

3 years

@DaveDawkins I did the 3D models in @Shapr3D with small post processing in Blender, animations are just done by hand

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Bartosz Ciechanowski

@BCiechanowski

10 years

Mesh Transforms. http://t.co/hU7Dzi1UjV

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Bartosz Ciechanowski

@BCiechanowski

5 years

Machine learning friends, I added support for bfloat16 to

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Bartosz Ciechanowski

@BCiechanowski

5 years

I added support for showing the exact decimal value stored in floats and it's fairly shocking how many digits some of them require, e.g.

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Bartosz Ciechanowski

@BCiechanowski

10 years

Exposing NSDictionary – http://t.co/sEakSm7S8y

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Bartosz Ciechanowski

@BCiechanowski

10 years

I open-sourced Revolved:

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Bartosz Ciechanowski

@BCiechanowski

2 years

@fatiherikliuniq Gears are just generated programmatically, it made it very easy to tweak their shape as needed

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Bartosz Ciechanowski

@BCiechanowski

2 years

@jkleiser Hi Jon, I don't use any libraries, just bare canvas/WebGL, I just find it more convenient to use things directly

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Bartosz Ciechanowski

@BCiechanowski

9 years

I like how @arekholko read the clang source code to figure out when the self-capture-in-block warnings are emitted: http://t.co/O88fkZuH3a

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Bartosz Ciechanowski

@BCiechanowski

3 years

@spiralganglion Just bare webGL, it’s not that many lines of code to setup and it gives me complete control over what I want to render

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Bartosz Ciechanowski

@BCiechanowski

7 years

@eldudi You’re welcome! 😊

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Bartosz Ciechanowski

@BCiechanowski

2 years

@_ptrks No special tools, they're just created in code

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Bartosz Ciechanowski

@BCiechanowski

3 years

@redblobgames @DaveDawkins @Shapr3D I started working on it around two months ago on most weekends and many weekday evenings

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Bartosz Ciechanowski

@BCiechanowski

8 years

Well, the last 12 months took some discipline.

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Bartosz Ciechanowski

@BCiechanowski

10 years

I’m finally reading Singh’s OS X book and it’s full of old school gems like “The Java environment is a core component of Mac OS X.”

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Bartosz Ciechanowski

@BCiechanowski

6 years

@arekholko Not necessarily true! Enable color offscreen in CA instrument to verify: no tint is free masking, green tint is very cheap masking, only yellow tint is an “expensive” case. A single CALayer without sublayers and just contents or just backgroundColor set can be masked for free!

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Bartosz Ciechanowski

@BCiechanowski

10 years

Non obvious NSSet trivia:

NSSet trivia

NSSet trivia. GitHub Gist: instantly share code, notes, and snippets.

gist.github.com

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Bartosz Ciechanowski

@BCiechanowski

8 years

"If you think Apple Watch is a flop you are a moron." – never change @gruber , never change! ❤️

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Bartosz Ciechanowski

@BCiechanowski

8 years

The garage doors may be closed, but @dawidwoldu 's mind is truly open!

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Bartosz Ciechanowski

@BCiechanowski

9 years

"Seeing Circles, Sines, and Signals" by @JackSchaedler is just super cool. http://t.co/btV6BiT8U7

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Bartosz Ciechanowski

@BCiechanowski

10 years

I wrote a bit about technical interview @macoscope , we'd love to hear your feedback! http://t.co/pYmH8GaiRL

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Bartosz Ciechanowski

@BCiechanowski

8 years

'A Good Snowman Is Hard To Build' is one of the best iOS puzzlers I've played in a while. Highly recommended!

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Bartosz Ciechanowski

@BCiechanowski

2 years

@s1mon Modeled in Shapr3D, animated manually in JS

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Bartosz Ciechanowski

@BCiechanowski

2 years

@serbanmarian17 ETA 2824

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Bartosz Ciechanowski

@BCiechanowski

5 years

@romainguy Haha, I wrote this so that I have something to refer to myself 😉

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Bartosz Ciechanowski

@BCiechanowski

4 years

@schneckerstein No frameworks, just plain JS and WebGL

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Bartosz Ciechanowski

@BCiechanowski

10 years

NSMutableArray uses circular buffer. Insertion/deletion from either end is OK. It never shrinks in size and reallocates with 1.625 factor.

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Bartosz Ciechanowski

@BCiechanowski

10 years

"A Strategy for Great Work" by @kocienda is just brilliant. One of the most enjoyable sessions of WWDC 2014.

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Bartosz Ciechanowski

@BCiechanowski

2 years

@ClintonDAnnolfo I don't track time, but each article takes a long time

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Bartosz Ciechanowski

@BCiechanowski

10 years

I created an open-sourced replacement for CAMeshTransform:

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Bartosz Ciechanowski

@BCiechanowski

10 years

As a sneak peak, here's what my next blog post will discuss. This is a UILabel. http://t.co/toHFvL6WYW

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Bartosz Ciechanowski

@BCiechanowski

3 years

@jakevossen5 @smartereveryday I know, I link to it in the article ;)

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Bartosz Ciechanowski

@BCiechanowski

8 years

“…we just leak the old hashtables”. I love how straightforward this is!

Locking in WebKit

We recently replaced all spinlocks, OS-provided mutexes, and condition variables in WebKit with the new WTF::Lock and WTF::Condition — these new primitives have some cool properties.

webkit.org

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Bartosz Ciechanowski

@BCiechanowski

10 years

Realities of making niche iPad apps: since it's launch 9 months ago Revolved made $344.

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Bartosz Ciechanowski

@BCiechanowski

8 years

@arekholko ha, I did that!

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Bartosz Ciechanowski

@BCiechanowski

10 years

I fixed the Quartz Composer connections!

GitHub - Ciechan/QCCableConnections: Cable-like connections bending for Quartz Composer

Cable-like connections bending for Quartz Composer - Ciechan/QCCableConnections

github.com

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Bartosz Ciechanowski

@BCiechanowski

11 years

Today I've launched Revolved, my brand new iPad app. Get it at

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Bartosz Ciechanowski

@BCiechanowski

9 years

@lilbitesofcocoa "Try to avoid ... views with a clear background" – it's fine, background colors with 0 alpha are not rendered (images are)

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Bartosz Ciechanowski

@BCiechanowski

5 years

@TimOliverAU Note that I was referring to shadowPath for the slicing thingy

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Bartosz Ciechanowski

@BCiechanowski

10 years

This blog. http://t.co/QktdrRpOsk

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Bartosz Ciechanowski

@BCiechanowski

6 years

@johnsundell The nice thing is it also helps developers who use Objective-C as the typedefs for NSStrings are always better than plain NSStrings. Everyone benefits from this change!

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Bartosz Ciechanowski

@BCiechanowski

2 years

@zanderadi @_ptrks For 3D on the web it’s probably easiest to start with something like three.js

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Bartosz Ciechanowski

@BCiechanowski

2 years

@jahidkureci I haven't tracked time, but it took a while, I started working on the article in late November

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Bartosz Ciechanowski

@BCiechanowski

3 years

@JakeJHansen1 Maybe someday!

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Bartosz Ciechanowski

@BCiechanowski

8 years

@krzyzanowskim @KOSTAPAPPASGR they’re not the same! Since iOS7 UIBezierPath returns “modern” smoothed paths. Layer’s cornerRadius is circle.

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Bartosz Ciechanowski

@BCiechanowski

3 years

@istvan_csanady @Shapr3D Thank you for founding the company! Shapr3D was easily the most enjoyable CAD experience I’ve ever had

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Bartosz Ciechanowski

@BCiechanowski

9 years

David Rönnqvist's new book is great SceneKit dive and interactive explanation of graphics programming essentials:

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Bartosz Ciechanowski

@BCiechanowski

10 years

Drawing Bézier Curves – http://t.co/ciVHzkqsxl

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Bartosz Ciechanowski

@BCiechanowski

4 years

@igneus Design in Sketch, static website generation with Hugo, rest is just manual coding

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Bartosz Ciechanowski

@BCiechanowski

4 years

@_eliperkins Thanks Eli, I think the reverse lights are my favorite bit 😉

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Bartosz Ciechanowski

@BCiechanowski

6 years

@steipete The only caveat with +flush is that it if you’re in any +begin/+commit “block” the actual commit to the server (and thus changes on screen) will happen after the +commit is called

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Bartosz Ciechanowski

@BCiechanowski

10 years

It’s been my last day at Macoscope. I had amazing time and I’ll miss the people greatly, but it’s time for the next chapter.

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Bartosz Ciechanowski

@BCiechanowski

3 years

@CasualPhysics Thanks Matt, yes, I hand code the demos

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Bartosz Ciechanowski

@BCiechanowski

3 years

@stocastico I fixed it, thank you very much for letting me know!

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Bartosz Ciechanowski

@BCiechanowski

10 years

NSDictionary is a hash table with linear probing. It keeps its keys and objects in indexed ivars. It may return an object for nil key.

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Bartosz Ciechanowski

@BCiechanowski

9 years

@NatashaTheRobot The Little Schemer. Starts with super easy recursion examples, ends up deriving Y combinator. Absolutely brilliant.

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Bartosz Ciechanowski

@BCiechanowski

10 years

Well, you don't have to use UIToolbar or hijack CABackdropLayer anymore!

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Bartosz Ciechanowski

@BCiechanowski

4 years

@palavalli I use Hugo static site generator, the content is just handwritten JS, CSS, and Markdown

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Bartosz Ciechanowski

@BCiechanowski

7 years

@steipete CG can’t possibly have implementation of every useful geometrical function and letterboxing is arguably most often tied to video

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Bartosz Ciechanowski

@BCiechanowski

7 years

Pan-Pan by @spelkraft is a great puzzle-adventure game, a great way to spend an evening or two!

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Bartosz Ciechanowski

@BCiechanowski

10 years

Unfortunately unreadable _UISiriWaveyView shaders: Probably generated by tool or run through some kind of optimizer

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Bartosz Ciechanowski

@BCiechanowski

2 years

@DrAgaMN Maybe some day!

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Bartosz Ciechanowski

@BCiechanowski

10 years

I love days like this: new issue of @objcio and a blog post by @mikeash

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Bartosz Ciechanowski

@BCiechanowski

6 years

@steipete @avaidyam If it reproduces very easily in a shipping app then there’s no need for a sample app. In general, the sooner you file a radar the better!

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Bartosz Ciechanowski

@BCiechanowski

4 years

@thomasaull It’s unminified JS so they are easily accessible in the website source itself, however, there are no comments and the quality is subpar though, since it’s all a write-once code

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Bartosz Ciechanowski

@BCiechanowski

10 years

This lecture on Y combinator by @jimweirich is one of the most mind blowing things I’ve seen in months. http://t.co/0qt1WCTPlH

Ruby Conf 12 - Y Not- Adventures in Functional Programming by Jim...

One of the deepest mysteries in the functional programming world is the Y-Combinator. Many have heard of it, but few have mastered its mysteries. Although fa...

www.youtube.com

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Bartosz Ciechanowski

@BCiechanowski

2 years

@knotFF No tools really, just a text editor and a web browser

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Bartosz Ciechanowski

@BCiechanowski

9 years

For some reason I've never played Micro Corruption before. Fantastic reverse engineering challenges – http://t.co/20kqhdGybM

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Bartosz Ciechanowski

@BCiechanowski

5 years

@TimOliverAU If you wanna chat about rounded corners some more with specific details of when it’s free and what to avoid then I’ll also be there on the Friday morning labs!

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Bartosz Ciechanowski

@BCiechanowski

8 years

@arekholko arguably, CoreAudio folks should have na audiobook form of it

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Bartosz Ciechanowski

@BCiechanowski

9 years

@dawdus @krlkzb you really have that comedy timing all figured out

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Bartosz Ciechanowski

@BCiechanowski

7 years

@hfossli ...IOSurface as a backing of e.g. MTLTexture then after you're done rendering you can just hand it off to CA without ever touching CPU/RAM.

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Bartosz Ciechanowski

@BCiechanowski

6 years

@uliwitness If you’re doing -drawRect: style drawing then you’ll be limited by device’s texture sizes, or process’s memory limits. If it’s e.g. just a backgroundColor set, then there is no (reasonable) limit as we just emit a colored quad.

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Bartosz Ciechanowski

@BCiechanowski

8 years

@steipete yeah, didn’t make it into seed 1, but it’s finally here!

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Bartosz Ciechanowski

@BCiechanowski

2 years

@oldo_nicho The pallet fork pushes it when it is itself pushed by the escape wheel

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Bartosz Ciechanowski

@BCiechanowski

2 years

@shubham_arora_0 @haritssr Nothing in particular, just seeing what it renders and tweaking from there

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Bartosz Ciechanowski

@BCiechanowski

4 years

@amit_merchant There is no library, it’s all just handwritten JS and CSS

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