그래픽 최적화를 위해서 필수로 알아야하는 드로우콜과 배칭을 심화하여 다룹니다. 드로우콜의 개념, Batch와 SetPass Call의 차이, 드로우콜 감소 방법 등등 기초 개념부터 실무적인 깊이까지 다룹니다. 기반지식 여부 상관 없이 모두 들으실 수 있습니다. 특히 아티스트와 프로그래머에게 도움이 될 것입니다.

2. 그래픽 최적화 함께하지 않겠나
http://unite.unity3dkorea.com

3. 그래픽 최적화 함께하지 않겠나
ozlael.oz
ozlael
ozlael.tistory.com
Support Engineer (john Oh)

5. -
- (Draw Call)
- Batch & Set Pass
- (Batching)
-
- (Culling)

6. CPU
DRAW!
Draw Call :
GPU
OK

7. (Draw Call)
Batch & Set Pass
(Batching)
(Culling)

8. Frame 1 Frame 2 Frame 3 Frame 4 Frame 5
Frame 6 Frame 7 Frame 8 Frame 9 Frame 10
1 sec
0 sec
10FPS(100ms/frame)

9. 1 frame ...

10. 1 frame ...

11. 1 frame ...

12. 1 frame ...

13. 1 frame ...

14. 1 frame ...

15. 1 frame ...

16. ...

17. ...

18. CPU GPU
CPU GPU
info
info

19. Batch & Set Pass
(Batching)
(Culling)

20. CPU
GPU
Frame
End
Frame
start

21. CPU
GPU
Frame
End
Frame
start

22. Logic AI Physics
Loading GC …
+Draw Call

23. CPU
DRAW!
Draw Call
GPU
OK

24. CPU
DRAW!
TEXTURE!
SHADER!
VERTEX BUFFER!
ALPHA BLENDING!
CHANGE STATES
Draw Call
GPU...
USE Z-BUFFER!
TRANSFORM

25. CPU (App)
GPU
COMMAND
Draw
COMMAND
SetTexture
COMMAND
Set Texture
COMMAND
Set VBO
COMMAND
Set Shader
Command Buffer
...
Video
Memory
To draw

27. Draw Call Cost
=

28. Draw Call Cost
= 5122048

29. Draw Call
image : http://www.upcomingmobilephone.com/

30. Batch & SetPass
(Draw Call)
(Batching)
(Culling)

31. Batch
= Draw Call
+ Set VB/IB (mesh)
+ Set Transform (Shader Constant)
+ Set Shader
+ Set Texture 0~7
+ Set Blending
+ Set Z enable
+ ...

32. Batches :
1

33. Batches :
17
Batches :
11

34. Batches :
6

35. Batch
= Draw Call
+ Set VB/IB (mesh)
+ Set Transform (Shader Constant)
+ Set Shader
+ Set Texture 0~7
+ Set Blending
+ Set Z enable
+ ...
SetPass Call
(Material&Shader)

36. Objects : 10 Batches : 10 SetPass Calls : 1

37. Objects : 10 Batches : 10 SetPass Calls : 10

38. !=
Batches :
10
Batches :
10
Set Pass :
1
Set Pass :
10

39. Objects : 10 Batches : 10 SetPass Calls : 1

40. Device Batches
Samsung Galaxy S2 85
Samsung Galaxy S3 178
Samsung Galaxy S4 215
Samsung Galaxy S5 260

41. 배칭(Batching) 을
봐주지 않겠나...
(Draw Call)
Batch & Set Pass
(Culling)

42. Batch(in Rendering Statistics Window)
= Draw Call
+ Setting Shader + Setting Blending
+ Setting Texture + Setting Vertex Buffer
+ ...

43. Batching =
1 batch for
many objects

44. Material A Material B
Batch
s
c
e
n
e
Batch

45. Batches : 10 batching-> Batch :1

46. Texture Atlas

47. 512
2048

48. Asset : Top-down Sci-Fi

49. Static Batching
&
Dynamic BatchingPlayer Settings

50. Static Batching

51. Dynamic Batching
GPU
Vertex/Index BufferScene

52. Dynamic Batching: 제약 사항
Overhead
- Skinned Mesh
- Vertex Mesh
- position, normal, uv0 -> 300
- position, normal, uv0, uv1, tangent -> 180
- http://docs.unity3d.com/kr/current/Manual/DrawCallBatching.html

58. Modular Construction

59. Unity Frame Debugger

60. 동영상

61. 드로우콜 줄이기 를
봐주지 않겠나...
(Draw Call)
Batch & Set Pass
(Batching)
(Culling)

62. Batches : 32+
Realtime Shadow : X2+ batches
Shadowmap

63. Shadow Plane
Batches : 17(meshes:16 shadow:1)

64. Batches : 2
Multi-pass Shader

65. Draw Call & Light

67. 3 Pixel Lights =
3 Batches
3 SetPass Calls
Tris * 3

68. Pixel Light : 3 x Mesh : 6 = Batch : 18

69. or

70. or

71. 컬링(Culling) 을
봐주지 않겠나...
(Draw Call)
Batch & Set Pass
(Batching)

72. Frustum Culling

73. Occlusion Culling

75. Unity Manual : http://docs.unity3d.com/kr/current/Manual/OcclusionCulling.html

76. Example
Asset : Top-Down Sci-Fi

77. Device : Galaxy Note4 Rez : 2560X1440
CPU : ARMv7 VFPv3(1.9GHz) GPU : Mali-760MP(0.6GHz)
Shader : Custom Unlit Shader, Self-Illumin/Diffuse, Lightmap : 13 textures

78. Condition 1
- Batching : No
- Occlusion Culling : No
Condition 2
- Batching : Yes
- Occlusion Culling : No
Condition 3
- Batching : Yes
- Occlusion Culling : Yes
FPS(ms) 41(24.3) 50(20.0) 60(16.6)
Batches 1365 157 94
SetPass Calls 134 142 81
Saved by Batching 0 1207 244
Tris 114.3K 114.3K 28.9K
-4.3ms -3.4ms
-1208 -63
-8 -61
-85.4K
Note :
- This is not the official data.
- This is the rough test. Not the exact reference.
- Keep in mind “case by case”

80. Player Settings
V

81. Thank you
support@unity3d.com
http://unite.unity3dkorea.com

82. 협찬:비엘북스