Affine Transform

Lightning Talk
フェンリル社内勉強会

1. ΞϑΟϯม׵ͷ࿩ Ӊࠤݟ ެี
2. Ͳ͜Ͱग़ͯ͘Δ͔
3. ϏϡʔΛมܗ͢Δ • iOS Ͱͷྫ : CGAffineTransform • UIView ͷ transform ϓϩύςΟɿฏߦҠಈɺ ֦େॖখɺճసɺͳͲ
4. ϑΥϯτΛมܗ͢Δ • CTFontCreate ͷҾ਺ʹ౉͢ : ࣼମϑΥϯτΛ ࡞Δ
5. ΞϑΟϯม׵͸ ਤܗͷมܗʹ࢖ΘΕ͍ͯΔ
6. ਤܗͷมܗ
7. ਤܗͷมܗ • ߹ಉม׵ʢϢʔΫϦουม׵ʣ • ૬ࣅม׵ • ΞϑΟϯม׵ • ࣹӨม׵
8. ߹ಉม׵ • ฏߦҠಈɺճసɺ൓స • ௕͞Λอͭ • ֯౓Λอͭ • → ਤܗͷܗ΍େ͖͞Λม͑ͳ͍
9. ૬ࣅม׵ • ߹ಉม׵ + ֦େɾॖখ • ௕͞ͷൺΛอͭʢ௕͞Λอͨͳ͍ʣ • ֯౓Λอͭ • → ਤܗͷܗΛม͑ͳ͍ʢେ͖͞͸มΘΔʣ
10. ΞϑΟϯม׵ • ૬ࣅม׵ + Ⴉஅมܗʢਖ਼ํܗΛඛܗʹʣ • ௕͞ͷൺΛอͭ • ฏߦੑΛอͭʢ௚֯ੑΛอͨͳ͍ʣ • → ਤܗͷܗ͕มΘΔʢࣼΊʹͳΔʣ
11. ࣹӨม׵ • ΞϑΟϯม׵ + ઔܗมܗ • ௕͞ͷൺΛอͨͳ͍ • ௚ઢੑΛอͭʢฏߦੑɾ௚֯ੑΛอͨͳ͍ʣ • → ਤܗͷܗ͕มΘΔ
12. ΞϑΟϯม׵ͷΠϝʔδ ܗ͸มΘΔ͚Ͳɺฏߦͳ΋ͷ͸ฏߦͳ··
13. ΞϑΟϯม׵ = ฏߦҠಈɺճసɺ൓సɺ ֦େॖখɺႩஅ
14. ม׵ͷ਺ࣜ
15. Lightning Talk ͳͷͰܰΊʹ
16. ճసͷ਺ࣜ ✓ x 0 y 0 ◆ = ✓ cos(t) sin(t) sin(t) cos(t) ◆ ✓ x y ◆
17. ฏߦҠಈʴճసͷ਺ࣜ ✓ x 0 y 0 ◆ = ✓ cos(t) sin(t) sin(t) cos(t) ◆ ✓ x y ◆ + ✓ e f ◆
18. ΞϑΟϯม׵ͷ਺ࣜ ✓ x 0 y 0 ◆ = ✓ a b c d ◆ ✓ x y ◆ + ✓ e f ◆
19. ม׵ͷ߹੒ ʢߦྻදݱͷϝϦοτʣ ✓ a1 b1 c1 d1 ◆ ✓ a2 b2 c2 d2 ◆
20. ಉ࣍࠲ඪʹΑΔදݱ ʢฏߦҠಈ΋ߦྻʹؚΊΔʣ 0 @x 0 y 0 1 1 A = 0 @a b e c d f 0 0 1 1 A 0 @x y 1 1 A
21. ·ͱΊ
22. ΞϑΟϯม׵͸ ؆୯ʹ࢖͑ͯศརͳͷͰ ஌͓ͬͯ͘ͱΑ͍