Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
AR without SceneKit
Search
naru-jpn
February 07, 2018
Programming
0
420
AR without SceneKit
Create AR application using Metal without SceneKit
naru-jpn
February 07, 2018
Tweet
Share
More Decks by naru-jpn
See All by naru-jpn
配信アプリのためのリアルタイムプッシュ通知ぼかしの夢
narujpn
3
900
PiPを応用した配信コメントバー機能の開発秘話と技術の詳解 / pip_streaming_comment_bar
narujpn
3
4.2k
Updating an App to Use Swift Concurrency 解説
narujpn
2
340
PiP で実現するミラティブの配信コメントバー / pip-streaming-comment-bar
narujpn
0
1.2k
App Extension のスタックトレース情報からクラッシュを解析/集計する / Analyzing app extension's stack trace
narujpn
3
1.5k
ミラティブとWebRTC - WebRTC framework の中身を覗いてみよう / WebRTC framework AudioUnit Processing
narujpn
1
2.2k
CoreML3のオンデバイストレーニングでつくる母音推定
narujpn
0
440
AltConfと周辺の歩き方
narujpn
0
2k
エンジニア経験を活かしたスクラムマスターとして 開発チームとプロダクトを成長させる
narujpn
1
410
Other Decks in Programming
See All in Programming
Startups on Rails in Past, Present and Future–Irina Nazarova, RailsConf 2025
irinanazarova
0
250
脱Riverpod?fqueryで考える、TanStack Queryライクなアーキテクチャの可能性
ostk0069
0
500
What's new in AppKit on macOS 26
1024jp
0
150
SQLアンチパターン第2版 データベースプログラミングで陥りがちな失敗とその対策 / Intro to SQL Antipatterns 2nd
twada
PRO
16
2.3k
スタートアップの急成長を支えるプラットフォームエンジニアリングと組織戦略
sutochin26
1
7.3k
はじめてのWeb API体験 ー 飲食店検索アプリを作ろうー
akinko_0915
0
140
チームのテスト力を総合的に鍛えて品質、スピード、レジリエンスを共立させる/Testing approach that improves quality, speed, and resilience
goyoki
5
1.1k
商品比較サービス「マイベスト」における パーソナライズレコメンドの第一歩
ucchiii43
0
180
The Niche of CDK Grant オブジェクトって何者?/the-niche-of-cdk-what-isgrant-object
hassaku63
1
620
効率的な開発手段として VRTを活用する
ishkawa
0
160
たった 1 枚の PHP ファイルで実装する MCP サーバ / MCP Server with Vanilla PHP
okashoi
1
300
#QiitaBash MCPのセキュリティ
ryosukedtomita
1
1.5k
Featured
See All Featured
Optimizing for Happiness
mojombo
379
70k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
VelocityConf: Rendering Performance Case Studies
addyosmani
332
24k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.6k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
The Straight Up "How To Draw Better" Workshop
denniskardys
235
140k
Visualizing Your Data: Incorporating Mongo into Loggly Infrastructure
mongodb
47
9.6k
Code Reviewing Like a Champion
maltzj
524
40k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
22k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.4k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
520
Transcript
AR without SceneKit #mobilearmeetup @Timers 2018/2/7
Relation of ARKit and SceneKit
ARKit Camera SceneKit Pixel Buffer 3D Info Rendering ARSCNView
ARKit Camera SceneKit Pixel Buffer 3D Info Rendering ARSCNView Light
Estimation Plane Detection Manage 3D Objects
Remove SceneKit and Use Metal
ARKit Camera SceneKit Pixel Buffer 3D Info Rendering ARSCNView Light
Estimation Plane Detection Manage 3D Objects
ARKit Camera Pixel Buffer 3D Info Light Estimation Plane Detection
Metal ARKit Camera Pixel Buffer 3D Info Light Estimation Plane
Detection Rendering
Metal ARKit Camera Pixel Buffer 3D Info Rendering Light Estimation
Plane Detection Take Photo
MetalAR https://github.com/naru-jpn/MetalAR
None
Metal ARKit Camera Pixel Buffer 3D Info Light Estimation Plane
Detection Rendering Take Photo
// Create ARSession session = ARSession() // ARSessionDelegate session.delegate =
self
Metal ARKit Camera Pixel Buffer 3D Info Light Estimation Plane
Detection Rendering Take Photo
// Defined in ARSessionDelegate // Called when ARFrame is updated
func session(_ session: ARSession, didUpdate frame: ARFrame) { // … }
A running AR session continuously captures video frames from the
device camera. For each frame, ARKit analyzes the image together with data from the device's motion sensing hardware to estimate the device's real-world position. ARFrame https://developer.apple.com/documentation/arkit/arframe
Metal ARKit Camera Pixel Buffer 3D Info Light Estimation Plane
Detection Rendering Take Photo
Pipeline of off-screen rendering Draw video frame Filter Draw Instances
ARFrame MTLTexture
Pipeline of off-screen rendering Filter Draw Instances ARFrame MTLTexture Draw
video frame Commands sent to GPU
Pipeline of off-screen rendering Filter Draw Instances ARFrame MTLTexture MPSImageSobel
declared in Metal Performance Shaders Draw video frame Commands sent to GPU
Performance on iPhone7
Filter Draw Instances ARFrame MTLTexture Draw video frame 3.3 ms
Rendering
Making Image to save drawHierarchy(in:afterScreenUpdates:) MTLTexture → CGImage 7.0 ~
10.0 ms available on background thread 30.0 ~ 40.0 ms required to execute on main thread
Challenges
Drawing original 3D objects User Interaction (available hitTest(_:types:) for ARFrame)
Physics engine Skeletal Animation …
References
Documents Metal Best Practices Guide https://developer.apple.com/library/content/documentation/ 3DDrawing/Conceptual/MTLBestPracticesGuide/index.html#// apple_ref/doc/uid/TP40016642-CH27-SW1 Metal Shading
Language Specification https://developer.apple.com/metal/Metal-Shading-Language- Specification.pdf
AR Template Project