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
430
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
950
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
4.4k
Updating an App to Use Swift Concurrency 解説
narujpn
2
350
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
1.6k
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
450
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
420
Other Decks in Programming
See All in Programming
Foundation Modelsを実装日本語学習アプリを作ってみた!
hypebeans
0
120
iOSでSVG画像を扱う
kishikawakatsumi
0
140
エンジニアインターン「Treasure」とHonoの2年、そして未来へ / Our Journey with Hono Two Years at Treasure and Beyond
carta_engineering
0
370
Goで実践するドメイン駆動開発 AIと歩み始めた新規プロダクト開発の現在地
imkaoru
4
870
Catch Up: Go Style Guide Update
andpad
0
230
The Past, Present, and Future of Enterprise Java
ivargrimstad
0
500
CSC509 Lecture 05
javiergs
PRO
0
310
AIと人間の共創開発!OSSで試行錯誤した開発スタイル
mae616
2
750
CSC305 Lecture 08
javiergs
PRO
0
250
株式会社 Sun terras カンパニーデック
sunterras
0
380
AI駆動で0→1をやって見えた光と伸びしろ
passion0102
1
590
その面倒な作業、「Dart」にやらせませんか? Flutter開発者のための業務効率化
yordgenome03
1
130
Featured
See All Featured
Six Lessons from altMBA
skipperchong
29
4k
Being A Developer After 40
akosma
91
590k
BBQ
matthewcrist
89
9.8k
Balancing Empowerment & Direction
lara
5
690
Music & Morning Musume
bryan
46
6.8k
Statistics for Hackers
jakevdp
799
220k
GraphQLの誤解/rethinking-graphql
sonatard
73
11k
Producing Creativity
orderedlist
PRO
347
40k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
52
5.6k
The Power of CSS Pseudo Elements
geoffreycrofte
79
6k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
9
990
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