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
ARKitのための3D算数
Search
KBOY
August 30, 2018
Programming
3
4.6k
ARKitのための3D算数
iOSDC 2018
KBOY
August 30, 2018
Tweet
Share
More Decks by KBOY
See All by KBOY
How to make Stripe and RevenueCat coexist in an app
fujikawakei
0
97
iOS15から使えるScreenTimeAPIをFlutterアプリで動かす
fujikawakei
0
130
FlutterエンジニアがFlutterFlowを使ってみた感想
fujikawakei
0
130
Flutterと課金
fujikawakei
0
130
【スタートアップ開発者必見】firebaseとalgoliaとstripeで1人で本格的なiOSアプリを作る方法
fujikawakei
2
570
ARCore-Kotlin-Sampler作ってきました
fujikawakei
0
250
Basic 3D Math for ARKit
fujikawakei
1
720
ARKitでお絵かきする方法2選
fujikawakei
0
1.8k
assertion を積極的に使って 役立った話
fujikawakei
0
2k
Other Decks in Programming
See All in Programming
LRパーサーはいいぞ
ydah
7
1.5k
Orleans + Sekiban + SignalR でリアルタイムWeb作ってみた
tomohisa
0
260
私のRubyKaigi 2025 Kaigi Effect / My RubyKaigi 2025 Kaigi Effect
chobishiba
1
180
UMAPをざっくりと理解 / Overview of UMAP
kaityo256
PRO
3
1.6k
CursorとDevinが仲間!?AI駆動で新規プロダクト開発に挑んだ3ヶ月を振り返る / A Story of New Product Development with Cursor and Devin
rkaga
5
1.4k
DevDay2025-OracleDatabase-kernel-addressing-history
oracle4engineer
PRO
1
120
AIコーディングの本質は“コード“ではなく“構造“だった / The essence of AI coding is not “code” but "structure
seike460
2
580
Language Server と喋ろう – TSKaigi 2025
pizzacat83
2
180
クラス設計の手順
akikogoto
0
140
M5UnitUnified 最新動向 2025/05
gob
0
150
Live Coding: Migrating an Application to Signals
manfredsteyer
PRO
0
130
Design Pressure
hynek
0
180
Featured
See All Featured
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
280
13k
The Pragmatic Product Professional
lauravandoore
33
6.6k
Building Applications with DynamoDB
mza
94
6.4k
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
StorybookのUI Testing Handbookを読んだ
zakiyama
30
5.7k
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
14
1.5k
The Straight Up "How To Draw Better" Workshop
denniskardys
233
140k
A Tale of Four Properties
chriscoyier
159
23k
How GitHub (no longer) Works
holman
314
140k
Scaling GitHub
holman
459
140k
Transcript
ARKitͷͨΊͷ 3Dࢉ KBOY@ےΤϯδχΞ 2018.8.30@iOSDC 2018
ࣗݾհ ૣҴా͕ߍͰ͢
ےΤϯδχΞͷܦྺ
݄ ݄ ݄ ݄ ݄
Spajam༏ल ϕετϘσΟδϟύϯग़ ے.swift։࠵ స৬υϥϑτग़ԋ ॱ෩ຬൕʂʁ
͔ͦ͠͠͏͘ͳ͍
ےΤϯδχΞͷ಄
ےΤϯδχΞ ઓࠃ࣌
ͦ͏ͩʂARͩʂ
݄ ݄ ݄ ݄ ݄
Spajam༏ल ϕετϘσΟδϟύϯग़ స৬υϥϑτग़ԋ ے.swift։࠵
Δ͔͠ͳ͍ ͜ͷϏοάΣʔϒʹ
ͱ͍͏͜ͱͰ
ࠓ1݄ʹ ARελʔτΞοϓJOIN
Graffity Inc. Ϧʔμʔ
͜ΜͳΞϓϦ࡞ͬͯ·͢
ͱ͍͏͜ͱͰARKitΛ ؤுͬͯษڧ͠·ͨ͠
͔͠͠ ͦ͏͘ͳ͍
͜͏͍͏ྫΛ ߟ͑ͯΈ·͠ΐ͏
εΫϦʔϯ্ͷλοϓͨ͠෦ͷ 30cmલʹ ඈߦػΛஔ͘
None
༨༟ͬ͠ΐʂ
λοϓδΣενϟʔ͔Β x, yΛऔಘ, z0.3mΛೖΕΕʂ
݁Ռ
None
શવग़ͯ͜ͳ͍…
ཧ
None
ݱ࣮
None
ͬͺΓ ͦ͏͘ͳ͍
ͦΜͳ࣌ɺϦʔμʔ͕ खΛࠩ͠৳ͯ͘Εͨ
3DϓϩάϥϛϯάΛ ษڧ͢Ε༨༟ͩΑ
Ϧʔμʔʂʂ
ͦͯ͠
3Dϓϩάϥϛϯά Λษڧͨ͠ɻ
ษڧʹͬͨຊ IUUQTBN[OUP.4V.F( IUUQTBN[OUP1,'Z5
ͱ͍͏͜ͱͰ
ࠓօ͞Μʹ Θ͔Γ͘͢ 3DϓϩάϥϛϯάΛ આ໌͠·͢
ARKitͷͨΊͷ 3Dࢉ KBOY@ےΤϯδχΞ 2018.8.30@iOSDC 2018
ࠓͷΰʔϧ
εΫϦʔϯ্ͷλοϓͨ͠෦ͷ 30cmલʹ ඈߦػΛஔ͘
None
ษڧ͢Δ͜ͱ •࠲ඪܥΛΔ •࠲ඪมͷϝιουΛΔ
ARKitͰ͏࠲ඪܥ
࠲ඪ·ͱΊ ϫʔϧυ࠲ඪܥ ΦϒδΣΫτ࠲ඪܥ Χϝϥ࠲ඪܥ εΫϦʔϯ࠲ඪܥ iPad ProͰॻ͖·ͨ͠ɻ
ϫʔϧυ࠲ඪܥ ͜ΕΑΓେ͖ͳ֎ଆͷ ࠲ඪۭؒͰදݱͰ͖ͳ͍
ΦϒδΣΫτ࠲ඪܥ ඈߦػࣗͷϩʔΧϧ࠲ඪʂ
Χϝϥ࠲ඪܥ ΧϝϥͷϩʔΧϧ࠲ඪ
Χϝϥ࠲ඪܥ
εΫϦʔϯ࠲ඪܥ
εΫϦʔϯ࠲ඪܥ
࠲ඪ·ͱΊ ϫʔϧυ࠲ඪܥ ΦϒδΣΫτ࠲ඪܥ Χϝϥ࠲ඪܥ εΫϦʔϯ࠲ඪܥ iPad ProͰॻ͖·ͨ͠ɻ
ΰʔϧͷ֬ೝ
εΫϦʔϯ্ͷλοϓͨ͠෦ͷ 30cmલʹ ඈߦػΛஔ͘
30cm εΫϦʔϯλοϓͷ xy࠲ඪऔಘ ϫʔϧυ࠲ඪʹมͯ͠ ͦ͜ʹஔ͘ʂ Χϝϥͷ30cmલʹஔ͘ ϫʔϧυ࠲ඪʹม ᶃ ᶄ ᶅ
εΫϦʔϯ࠲ඪʹม ᶆ ᶄ’ εΫϦʔϯ࠲ඪʹม
ᶃΧϝϥ࠲ඪͰ30cmલʹஔ͘ ϚΠφε 30cm
None
ᶄϫʔϧυ࠲ඪʹม
͋Δ࠲ඪܥ͔Β ͋Δ࠲ඪܥ มͰ͖Δ
ᶄ’εΫϦʔϯ࠲ඪʹม
ϫʔϧυ࠲ඪܥ→εΫϦʔϯ࠲ඪܥ
ᶅεΫϦʔϯλοϓͷxy࠲ඪऔಘ
ᶆϫʔϧυ࠲ඪʹมͯ͠ஔ͘
εΫϦʔϯ࠲ඪܥ→ϫʔϧυ࠲ඪܥ
30cmલ λοϓͨ͠Ґஔ ม ม
ͦΕͧΕɺ߹ͷ͍͍ ࠲ඪܥͰܭࢉ͢Δ
ͪͳΈʹ
εΫϦʔϯ࠲ඪܥ͚ͩ ͰશͯΛදݱͰ͖Δ
εΫϦʔϯλοϓͷ xy࠲ඪऔಘ ϫʔϧυ࠲ඪʹมͯ͠ ͦ͜ʹஔ͘ʂ Χϝϥͷ30cmલʹஔ͘ ϫʔϧυ࠲ඪʹม ᶃ ᶄ ᶅ εΫϦʔϯ࠲ඪʹม
ᶆ ᶄ’ εΫϦʔϯ࠲ඪʹม ͜͜ল͚Δ 30cm
͜͜ল͚Δ
ͬͪ͜ͷํָ͕͡ΌΜʂ
͔ͨ͠ʹ
͜ͷ͍ίʔυͰߦ͚Δ
None
Ͱ
࣮
͜ͷ0.996 Χϝϥ࠲ඪܥͷ0.3mͱ ಉ͡ҙຯ
0.996ͱ
͜͜Ͱ࠲ඪܥͷ෮श
0.0 1.0 εΫϦʔϯ࠲ඪܥͷ z 0.001m 1000m Χϝϥ࠲ඪܥͷ z
εΫϦʔϯ࠲ඪܥͷz
https://developer.apple.com/documentation/scenekit/scnscenerenderer/1522631-unprojectpoint εΫϦʔϯ࠲ඪܥͷ z0.0~1.0
Χϝϥ࠲ඪܥͷzʁ
None
None
None
debugͯ͠ΈΔͱ
None
zNearΛ มԽͤͯ͞ΈΑ͏
None
0.0 1.0 εΫϦʔϯ࠲ඪܥͷ z 0.001m 1000m Χϝϥ࠲ඪܥͷ z
εΫϦʔϯ࠲ඪͷz vs Χϝϥ࠲ඪͷz
http://www.alecjacobson.com/weblog/?p=3835 -0.001 -1000 0.996 screenZ = f(n + cameraZ)/((f −
n)cameraZ) -0.3 screenZ cameraZ
screenZ = f(n + cameraZ)/((f − n)cameraZ) screenZ = 1000(0.001
+ (−0.3))/((1000 − 0.002)(−0.3)) f = 1000 n = 0.001 cameraZ = − 0.3 screenZ = 0.9966...
࣮ʹ໘͍͘͞
͜͜ল͚Δʂʁ
ඞཁʂ
ͱ͍͏͜ͱͰ
࠲ඪมΛۦͯ͠
None
ʂ
͏ͪΐ͍ͬͯΈ·͠ΐ͏ʂ
ඈߦػΛ֦େͨ͠Γɺ ճసͤ͞Α͏ʂ
֦େɾॖখ
ճస (SCNVector4) ࣠ ֯
ճస(Euler angle)
ճస (Euler angle) x
ճస (Euler angle) Y
ճస (Euler angle) Z
x Y Z
Ҏ্
͜͜·Ͱ͕ࢉ
·ֶ͕ͩ͋Γ·͢ɻ
Ͱ
࠲ඪͷ֓೦Λཧղͯ͠ SceneKitARKitΛ ͍͜ͳͤΕྑ͍ɻ
ֶʹ͍ͭͯQiitaͰɻ
ARKitͷͨΊͷ 3D ֶ
ࠂ
Graffity Inc. ΤϯδχΞืूதʂ
࠷ޙʹ
ݸਓͰARKitͷಈըڭࡐ࡞த
One More Thing
ࠓΓ·͢ .kt
ے.kt w :BIPP-PEHF w ݄
͓ΘΓ