requirements with math

Google Developer Group Korea Super.init(V6) Presentation

Transcript

1. Korea Android ࣻ೟ਵ۽ UI ਃҳࢎ೦ ݅઒ೞӝ MoonHwi Han super.init(version=6)
2. ࣻ೟… જইೞदաਃ? 저는 별로…
3. ࣻ೟… જইೞदաਃ?
4. ࣻ೟… જইೞदաਃ?
5. ࣻ೟… જইೞदաਃ?
6. Androidীח?
7. ࣻ೟ਸ ੉ਊೠ ҃೷ ઺, Ҋ١೟Ү ࣻ೟ਵ۽ ࢚ഐ੘ਊਸ ٜ݅ ࣻ ੓׮.
8. ࢖пೣࣻ۽ ௼ӝ ઁযೞӝ Korea Android super.init(version=6)
9. ਗ Ӓܻӝ “지도 위에 반경을 그리는 기능을 만들어주세요”
10. ਗ Ӓܻӝ
11. ਗ Ӓܻӝ
12. ਗ Ӓܻӝ MotionEvent.ACTION_MOVE -> { val dragPosX = it.x val dragPosY = it.y }
13. ਗ Ӓܻӝ val dx = (circleCenterPos.x - dragPosX).toDouble() val dy = (circleCenterPos.y - dragPosY).toDouble() val radPx = sqrt(dx.pow(2.0) + dy.pow(2.0)) val radMeter = radPx * naverMap.projection.metersPerPixel
14. ਗ Ӓܻӝ circle.radius = radMeter
15. ਗ Ӓܻӝ MotionEvent.ACTION_MOVE -> { val dragPosX = it.x val dragPosY = it.y val dx = (circleCenterPos.x - dragPosX).toDouble() val dy = (circleCenterPos.y - dragPosY).toDouble() val radPx = sqrt(dx.pow(2.0) + dy.pow(2.0)) val radMeter = radPx * naverMap.projection.metersPerPixel circle.radius = if (radMeter > 500) 500.0 else radMeter }
16. ਗ Ӓܻӝ
17. ਗ Ӓܻӝ ߈૑ܴ rਸ 500m۽ ઁೠ
18. ਗ Ӓܻӝ indicatorח (x, y)о ইצ (x’, y’)ܳ ٮۄоঠ ೠ׮.
19. ਗ Ӓܻӝ
20. ਗ Ӓܻӝ
21. ਗ Ӓܻӝ
22. ਗ Ӓܻӝ val degree = atan2(dy, dx)
23. ਗ Ӓܻӝ
24. ਗ Ӓܻӝ val x = radiusLimitPx * cos(degree) * -1 val y = radiusLimitPx * sin(degree) * -1
25. ਗ Ӓܻӝ MotionEvent.ACTION_MOVE -> { val dragPosX = it.x val dragPosY = it.y val dx = (circleCenterPos.x - dragPosX).toDouble() val dy = (circleCenterPos.y - dragPosY).toDouble() val radPx = sqrt(dx.pow(2.0) + dy.pow(2.0)) val radMeter = radPx * naverMap.projection.metersPerPixel }
26. ਗ Ӓܻӝ if (radPx > radiusLimitPx) { //пب ҳೞӝ val degree = atan2(dy, dx) val x = radiusLimitPx * cos(degree) * -1 val y = radiusLimitPx * sin(degree) * -1
27. ਗ Ӓܻӝ val circleCenterPx = naverMap.projection.toScreenLocation(circle.center) val latLng = naverMap.projection.fromScreenLocation( PointF( x.toFloat() + circleCenterPx.x, y.toFloat() + circleCenterPx.y ) ) indicator.position = latLng circle.radius = radiusLimit
28. ਗ Ӓܻӝ else { circleMarker.position = naverMap.projection.fromScreenLocation(PointF(it.x, it.y)) circle.radius = circle.center.distanceTo(circleMarker.position) }
29. ਗ Ӓܻӝ
30. ਗ Ӓܻӝ
31. ࢖пೣࣻ & Vector۽ ഥ੹ೞӝ Korea Android super.init(version=6)
32. ੉޷૑ ഥ੹ “이미지를 핸들로 회전할 수 있게 해 주세요”
33. ੉޷૑ ഥ੹
34. ੉޷૑ ഥ੹
35. ੉޷૑ ഥ੹
36. ੉޷૑ ഥ੹
37. ੉޷૑ ഥ੹
38. ੉޷૑ ഥ੹ ઁ 2 ௏ࢎੋ ߨ஗
39. ੉޷૑ ഥ੹
40. ੉޷૑ ഥ੹
41. ੉޷૑ ഥ੹ fun Offset.distanceTo(offset: Offset): Float = sqrt((this.x - offset.x).pow(2) + (this.y - offset.y).pow(2))
42. ੉޷૑ ഥ੹ val a = touchPos.distanceTo(prevPos) val b = prevPos.distanceTo(imagePos) val c = imagePos.distanceTo(touchPos) val cosA = (b.pow(2) + c.pow(2) - a.pow(2)) / (2 * b * c)
43. ੉޷૑ ഥ੹ val currDegree = Math.toDegrees(acos(cosA).toDouble()).toFloat()
44. ੉޷૑ ഥ੹
45. ੉޷૑ ഥ੹
46. ੉޷૑ ഥ੹ ҳೠ пبח ೦࢚ নࣻ ߑೱ੉ হ਺
47. ੉޷૑ ഥ੹
48. ߭ఠ੄ ৻੸
49. ߭ఠ੄ ৻੸
50. ߭ఠ੄ ৻੸
51. ߭ఠ੄ ৻੸ fun Offset.toVectorOffset(offset: Offset) = Offset(offset.x - this.x, offset.y - this.y) fun Offset.crossProduct(offset: Offset) = this.x * offset.y - this.y * offset.x
52. ߭ఠ੄ ৻੸ degree = Degree(degree.value + if (product < 0) +currDegree else -currDegree)
53. ߭ఠ੄ ৻੸
54. ݃஖ݴ Korea Android super.init(version=6)
55. ࣻ೟… જই૑࣑աਃ? 저는 별로…
56. ࣻ೟… જই૑࣑աਃ? ࣻ೟җ ஘ೡࣻ۾ ҳഅ੄ ಩੉ ևয૘פ׮.
57. хࢎ೤פ׮