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Game Engine Gems 1

Chap 2.
The Game Asset Pipeline
ohyecloudy
   homepage http://ohyecloudy.com
   twitter @ohyecloudy
shader cafรฉ http://cafe.naver.com/shader
                               2011.06.13
1GB๊ฐ€ ํฐ๊ฑด๊ฐ€?
 ์š”์ฆ˜ ๊ฒŒ์ž„์€ ๋‹ค ์šฐ์Šต๊ฒŒ 1GB๋Š” ๋„˜๊ธด๋‹ค
 ์—ฌ๊ธฐ์„œ ๋Œ€๋ถ€๋ถ„์€ game asset


๊ฐˆ์ˆ˜๋ก ์ปค์ง€๋Š” asset ๊ด€๋ฆฌ๊ฐ€ ๋ฌธ์ œ
 ์•„ํ‹ฐ์ŠคํŠธ๊ฐ€ ํ•˜์–—๊ฒŒ ๋ถˆํƒœ์šธ ์ˆ˜ ์žˆ๋Š” ํšจ์œจ์ ์ธ pipeline ํ•„์ˆ˜
 ํ”Œ๋žซํผ์— ๋งž๋Š” ์ตœ์ ํ™”๋Š” ํ•„์ˆ˜
Asset ๊ฐ€๊ณต pipeline์„ ์‚ดํŽด๋ณธ๋‹ค

COLLADA๋ฅผ ์‚ด์ง ์†Œ๊ฐœ
 intermediate asset format์œผ๋กœ ์ œ๊ฒฉ
Asset pipeline overview
Asset pipeline design
Push or pull pipeline model
COLLADA
Conclusion
Source Assets
     3D tool               Image tool
    + plug-ins             + plug-ins


     Model
                            Textures
   Animations


                                        Intermediate Assets
    Exporters              Exporters

                                        Fast Path
Interm.          Interm.     Interm.
Models            Anims     Textures


                                                    Final Assets
     Build                    Build
                                        Build Path
  Platform A               Platform B
Source Assets
     3D tool           Image tool
    + plug-ins         + plug-ins
      ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค
     Modelํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ๋งž๋Š” ์ตœ์ ํ™”๋œ asset์„ ๋งŒ๋“œ๋Š” ๊ณผ์ •
                      Textures
   Animations

      ํšจ์œจ์ ์ธ ๊ฐœ๋ฐœ์„ ์œ„ํ•ด                    Intermediate Assets
          ์ž๋™์€ ๊ธฐ๋ณธ
    Exporters          Exporters

                                      Fast Path
      ์ข…์†์„ฑ ์ •๋ณด๊ฐ€ ๋ถ€์žฌ
Interm.   ์—†๋‹ค๋ฉดInterm.       Interm.
                ํ•˜๋‚˜ ๋ฐ”๋€Œ์–ด๋„ ์ „์ฒด ๋นŒ๋“œ
Models          Anims     Textures
          ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค ์ตœ์ ํ™” ์ด์Šˆ
          source asset์„ ๋งŒ๋“œ๋Š” ์‚ฌ๋žŒ์ด ์ง์ ‘ ๊ธฐ์ˆ ํ•˜๊ฑฐ๋‚˜
          ๋”ฐ๋กœ ์‹œ์Šคํ…œ์„ ๋งŒ๋“ค์–ด์•ผ ํ•œ๋‹ค                         Final Assets
     Build                Build
                                     Build Path
  Platform A           Platform B
Source Assets
    3D tool              Image tool
   + plug-ins            + plug-ins


     Model
                          Textures
   Animations


                                       Intermediate Assets
์•„ํ‹ฐ์ŠคํŠธ์™€ ๋””์ž์ด๋„ˆ๊ฐ€Exporters asset
 Exporters  ๋งŒ๋“œ๋Š”
                                       Fast Path
 DCCDigital Content Creation Interm.
Interm.         Interm.
                             tools
     source asset์„ ๋งŒ๋“œ๋Š” ํˆด์„Textures์šฉ์–ด
Models           Anims       ๋ถ€๋ฅด๋Š”


final asset์„ ๋งŒ๋“œ๋Š” ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ์–ด์•ผ ํ•จ Final Assets
   source asset๋งŒ ๋นผ๊ณ  ๋‹ค ์ง€์›Œ๋„ final asset์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ์–ด์•ผ ํ•œ๋‹ค
     Build                  Build
                                       Build Path
  Platform A             Platform B
Source Assets
   3D tool            Image tool
  + plug-ins          + plug-ins


    Model
                        Textures
  Animations
  Intermediate Assets
    DCC๋กœ ๋งŒ๋“ค๊ณ  ๋‚œ ๋’ค                   Intermediate Assets
  Exporters        Exporters
    ํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ์ตœ์ ํ™”๋œ asset์„ ๋งŒ๋“ค๊ธฐ ์ „
                                   Fast Path
    ์ฝ๊ธฐ, ํŒŒ์‹ฑ, ํ™•์žฅ์ด
Interm.    Interm.   ์‰ฌ์›Œ์•ผ ํ•จ
                      Interm.
Models๋ฐ”์ด๋„ˆ๋ฆฌ๋Š” Anims
            ์—ฟ๋จน๋Š”๋‹ค        Textures
    ๋ฌธ์ œ์  ์ถ”์  ๋ฐ ์ž„์‹œ ๋ณ€๊ฒฝ ํ…Œ์ŠคํŠธ๊ฐ€ ์šฉ์ด
    plain text๋‚˜ XML์„ ์ถ”์ฒœ                        Final Assets
    Build                Build
                                   Build Path
 Platform A           Platform B
Source Assets
     3D tool               Image tool
    + plug-ins             + plug-ins


     Model
                            Textures
   Animations
   Fast Path
                                        Intermediate Assets
    Exporters              Exporters
   ๊ฒŒ์ž„ ์—”์ง„์œผ๋กœ ๋กœ๋“œํ•  ์ˆ˜ ์žˆ์Œ
      ์ „์ฒด ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ๊ฑฐ์น˜์ง€ ์•Š๊ณ                 Fast Path
Interm.          Interm.     Interm.
Models            Anims     Textures
   ํšจ์œจ์„ฑ ํ–ฅ์ƒ์— ํ•ต์‹ฌ
      ์•„ํ‹ฐ์ŠคํŠธ์—๊ฒŒ ๋น ๋ฅธ ์ดํ„ฐ๋ ˆ์ด์…˜ ์ œ๊ณต
                                                    Final Assets
     Build                    Build
                                        Build Path
  Platform A               Platform B
Source Assets
    3D tool           Image tool
   + plug-ins         + plug-ins


    Model
                       Textures
  Animations


                       Intermediate Assets
 ํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ๋งž๊ฒŒ ์ตœ์ ํ™”๋˜๊ณ  ๋ฌถ์ธ asset
  Exporters  Exporters

                                   Fast Path
 ๋Œ€๋ถ€๋ถ„ binary ํŒŒ์ผ
Interm.     Interm.     Interm.
ModelsํŒŒ์‹ฑ์— ๋“œ๋Š”Anims ์‹œ๊ฐ„์„ ์ค„์ด๊ธฐ ์œ„ํ•ด
              CPU      Textures


                                               Final Assets
    Build                Build
                                   Build Path
 Platform A           Platform B
Asset pipeline overview
Asset pipeline design
Push or pull pipeline model
COLLADA
Conclusion
๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ ์„ฑ๊ฒฉ
 view-only
 editing
view-only
  ์นด๋ฉ”๋ผ ์œ„์น˜, ๋ผ์ดํŒ… ์กฐ๊ฑด ๋“ฑ ์ปจํŠธ๋กค์„ ๊ฐ€์ง
  asset ๋ณ€๊ฒฝ์€ ๋ถˆ๊ฐ€๋Šฅ. DCC์—์„œ๋งŒ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์žˆ๋‹ค


editing
  asset์„ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์žˆ์–ด ๋น ๋ฅธ ๋ฐ˜๋ณต์ด ๊ฐ€๋Šฅ
  ํ•˜์ง€๋งŒ asset pipeline์ด ๋” ๋ณต์žกํ•ด์ง
view-only์™€ editing ๊ฒฐํ•ฉ์ด ํ•„์š”
 ๋ชจ๋“  ํ”„๋กœ์ ํŠธ๋ฅผ ๋งŒ์กฑํ•˜๋Š” ๋งˆ๋ฒ• ๊ฐ™์€ ์†”๋ฃจ์…˜์€ ์—†๋‹ค
 source asset์— ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ๋‹ค๋Š” ๊ฒƒ๋งŒ ๋งŒ์กฑ์‹œํ‚ค๋ฉด ๋จ
์™œ intermediate asset์ด ํ•„์š”ํ•œ๊ฐ€?
 source asset๊ณผ final asset ๊ฒฐํ•ฉ ์ œ๊ฑฐ
 ํฌ๋กœ์Šค ํ”Œ๋žซํผ asset ์ƒ์„ฑ์ด ์‰ฝ๋‹ค
source asset๊ณผ final asset ๊ฒฐํ•ฉ ์ œ๊ฑฐ
  DCC์—์„œ exportํ•  ๋•Œ final asset์„ ๋ฐ”๋กœ ๋งŒ๋“ค๋ฉด
  ์—”์ง„ ๋ณ€๊ฒฝ์— ์˜์กดํ•˜๊ฒŒ ๋˜์–ด์„œ re-export๊ฐ€ ๋นˆ๋ฒˆ

  ํ”„๋กœ๊ทธ๋ž˜๋จธ์™€ ์•„ํ‹ฐ์ŠคํŠธ ์ž‘์—… ๊ฒฐํ•ฉ๋„ ์ค„์ž„
  ๋””๋ฒ„๊น…๊ณผ ์‹คํ—˜์€ intermediate asset์„ ์‚ฌ์šฉ
ํฌ๋กœ์Šค ํ”Œ๋žซํผ asset ์ƒ์„ฑ์ด ์‰ฝ๋‹ค
 intermediate asset ๊ฐ€๊ณต๋งŒ ์ƒ๊ฐํ•˜๋ฉด ๋œ๋‹ค
Asset pipeline overview
Asset pipeline design
Push or pull pipeline model
COLLADA
Conclusion
Push model
  ์ „ํ†ต์ ์ธ ๋ฐฉ๋ฒ•
  ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ํ˜ธ์ถœํ•ด intermediate๋‚˜ final asset ์ƒ์„ฑ
  ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ๋กœ ๋กœ๋“œ


Pull model
  ๋” ์ง„๋ณด๋œ ๋ฐฉ๋ฒ•
  ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ์—์„œ intermediate๋‚˜ final asset ๋กœ๋“œ
  UI ์ง€์›์ด๋‚˜ ๋ณ€๊ฒฝ๋œ ํŒŒ์ผ์„ ๊ฐ์‹œํ•ด์„œ ๊ตฌํ˜„
๋ชจ๋“  ์ •๋ณด๋Š” source asset์— ์žˆ์–ด์•ผ ํ•จ
 ์ˆ˜์ • ์‚ฌํ•ญ์ด ๋ชจ๋‘ ๊ธฐ๋ก๋˜๊ธฐ ์œ„ํ•œ ์ œํ•œ
 intermediate asset ๋ณ€๊ฒฝ ์‚ฌํ•ญ์ด source asset์— ๋ฐ˜์˜


editing๊ณผ pull ๊ฒฐํ•ฉ
 ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ๊ฐ€ ๋ณ€๊ฒฝํ•œ ๊ฒŒ source asset์— ๋ฐ˜์˜๋˜๊ณ 
 ์ƒ์„ฑ๋œ intermediate asset์„ ๋‹ค์‹œ ์ฝ์–ด ๋“ค์ž„
 remote control ์‹œ์Šคํ…œ์ด ํ•„์š”
Remote Control



 Animation                 Modeling       Normal Map           Texturing
   Tool                     Tool             Tool                Tool
          Source                 Source            Source               Source




                                          Export
Export




                        Export




                                                            Export
           Asset                  Asset             Asset                Asset




                       Intermediate Asset Cache




                                                            Fast Path
               Build




         Final Asset Cache            Build Path
                                                       Game Engine
                                                          Editor
Asset pipeline overview
Asset pipeline design
Push or pull pipeline model
COLLADA
Conclusion
SIGGRAPH 2004์—์„œ ์ฒ˜์Œ ์†Œ๊ฐœ

open standard
  ๋งŽ์€ DCC tool์ด ์ง€์›
  3ds max, maya, google sketchup, โ€ฆ


๋งŽ์€ ๋ฐ์ดํ„ฐ ์ •์˜ ์ง€์›
  geometry, animation, skinning, morphing, physics, โ€ฆ
<source id=โ€œmesh-geometry-positionโ€>
  <float_array id=โ€œmesh1-geometry-position-arrayโ€
    count=โ€œ24โ€>
    2518.1875 4074.512965 0. 2518.1875 0.
    โ€ฆ
  </float_array>

  <technique_common>
    <accessor
      source=โ€œmesh1-geometry-position-arrayโ€
      count=โ€œ8โ€
      stride=โ€œ3โ€>
      <param name=โ€œXโ€ type=โ€œfloatโ€/>
      <param name=โ€œYโ€ type=โ€œfloatโ€/>
      <param name=โ€œZโ€ type=โ€œfloatโ€/>
    </accessor>
  </technique_common>
</source>
intermediate asset format์œผ๋กœ ์ถ”์ฒœ
 self-described data
 ๋งŽ์€ DCC tool์—์„œ ์ง€์›
 ์ด ์šฉ๋„๋กœ ์“ฐ๋ ค๊ณ  ๋งŒ๋“ค์–ด์„œ ๋งŒ๋“ค์–ด์ง„ ๊ฒŒ ๋งŽ๋‹ค
 <library_xx>, <param>, URI technology, โ€ฆ
Asset pipeline overview
Asset pipeline design
Push or pull pipeline model
COLLADA
Conclusion
asset pipeline์€ ๊ฐœ๋ฐœ backbone
 ์•ˆ ๋˜๋ฉด ๊ณ ์ณ์งˆ ๋•Œ๊นŒ์ง€ ๊ฐœ๋ฐœ์ด ์ค‘์ง€


source asset์— ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ์–ด์•ผ ํ•จ
 source asset๋งŒ ๋ฒ„์ „ ์ปจํŠธ๋กค
 ์ˆ˜์ •๋œ ์‚ฌํ•ญ์„ ์žƒ์–ด๋ฒ„๋ฆฌ๋Š” ์ผ์ด ์—†๋‹ค
ํšจ์œจ์ ์ธ ๊ฐœ๋ฐœ์„ ์œ„ํ•œ Fast Path
 ํ•˜๋‚˜ ํ™•์ธ ํ•˜๋ ค๊ณ  ๊ธด ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ๊ธฐ๋‹ค๋ ค์•ผ ํ•ด?
 ์•„ํ‹ฐ์ŠคํŠธ๊ฐ€ ํ•˜์–—๊ฒŒ ๋ถˆํƒœ์šธ ์ˆ˜ ์žˆ๋„๋ก ํ•˜์ž


COLLADA
 intermediate asset format์œผ๋กœ ์“ฐ๋ ค๊ณ  ๋งŒ๋“ค์—ˆ๋‹ค
 ์™ ๋งŒํ•œ ๋ฐ์ดํ„ฐ๋Š” ๋‹ค ๊ธฐ์ˆ ๋˜์—ˆ์Œ
 ๋งŽ์€ DCC tool์—์„œ ์ง€์›
 ์“ฐ๋Š” ๊ฑธ ์ ๊ทน ๊ณ ๋ ค
[GEG1] 2.the game asset pipeline
[GEG1] 2.the game asset pipeline

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[GEG1] 2.the game asset pipeline

  • 1. Game Engine Gems 1 Chap 2. The Game Asset Pipeline ohyecloudy homepage http://ohyecloudy.com twitter @ohyecloudy shader cafรฉ http://cafe.naver.com/shader 2011.06.13
  • 2. 1GB๊ฐ€ ํฐ๊ฑด๊ฐ€? ์š”์ฆ˜ ๊ฒŒ์ž„์€ ๋‹ค ์šฐ์Šต๊ฒŒ 1GB๋Š” ๋„˜๊ธด๋‹ค ์—ฌ๊ธฐ์„œ ๋Œ€๋ถ€๋ถ„์€ game asset ๊ฐˆ์ˆ˜๋ก ์ปค์ง€๋Š” asset ๊ด€๋ฆฌ๊ฐ€ ๋ฌธ์ œ ์•„ํ‹ฐ์ŠคํŠธ๊ฐ€ ํ•˜์–—๊ฒŒ ๋ถˆํƒœ์šธ ์ˆ˜ ์žˆ๋Š” ํšจ์œจ์ ์ธ pipeline ํ•„์ˆ˜ ํ”Œ๋žซํผ์— ๋งž๋Š” ์ตœ์ ํ™”๋Š” ํ•„์ˆ˜
  • 3. Asset ๊ฐ€๊ณต pipeline์„ ์‚ดํŽด๋ณธ๋‹ค COLLADA๋ฅผ ์‚ด์ง ์†Œ๊ฐœ intermediate asset format์œผ๋กœ ์ œ๊ฒฉ
  • 4. Asset pipeline overview Asset pipeline design Push or pull pipeline model COLLADA Conclusion
  • 5. Source Assets 3D tool Image tool + plug-ins + plug-ins Model Textures Animations Intermediate Assets Exporters Exporters Fast Path Interm. Interm. Interm. Models Anims Textures Final Assets Build Build Build Path Platform A Platform B
  • 6. Source Assets 3D tool Image tool + plug-ins + plug-ins ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค Modelํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ๋งž๋Š” ์ตœ์ ํ™”๋œ asset์„ ๋งŒ๋“œ๋Š” ๊ณผ์ • Textures Animations ํšจ์œจ์ ์ธ ๊ฐœ๋ฐœ์„ ์œ„ํ•ด Intermediate Assets ์ž๋™์€ ๊ธฐ๋ณธ Exporters Exporters Fast Path ์ข…์†์„ฑ ์ •๋ณด๊ฐ€ ๋ถ€์žฌ Interm. ์—†๋‹ค๋ฉดInterm. Interm. ํ•˜๋‚˜ ๋ฐ”๋€Œ์–ด๋„ ์ „์ฒด ๋นŒ๋“œ Models Anims Textures ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค ์ตœ์ ํ™” ์ด์Šˆ source asset์„ ๋งŒ๋“œ๋Š” ์‚ฌ๋žŒ์ด ์ง์ ‘ ๊ธฐ์ˆ ํ•˜๊ฑฐ๋‚˜ ๋”ฐ๋กœ ์‹œ์Šคํ…œ์„ ๋งŒ๋“ค์–ด์•ผ ํ•œ๋‹ค Final Assets Build Build Build Path Platform A Platform B
  • 7. Source Assets 3D tool Image tool + plug-ins + plug-ins Model Textures Animations Intermediate Assets ์•„ํ‹ฐ์ŠคํŠธ์™€ ๋””์ž์ด๋„ˆ๊ฐ€Exporters asset Exporters ๋งŒ๋“œ๋Š” Fast Path DCCDigital Content Creation Interm. Interm. Interm. tools source asset์„ ๋งŒ๋“œ๋Š” ํˆด์„Textures์šฉ์–ด Models Anims ๋ถ€๋ฅด๋Š” final asset์„ ๋งŒ๋“œ๋Š” ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ์–ด์•ผ ํ•จ Final Assets source asset๋งŒ ๋นผ๊ณ  ๋‹ค ์ง€์›Œ๋„ final asset์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ์–ด์•ผ ํ•œ๋‹ค Build Build Build Path Platform A Platform B
  • 8. Source Assets 3D tool Image tool + plug-ins + plug-ins Model Textures Animations Intermediate Assets DCC๋กœ ๋งŒ๋“ค๊ณ  ๋‚œ ๋’ค Intermediate Assets Exporters Exporters ํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ์ตœ์ ํ™”๋œ asset์„ ๋งŒ๋“ค๊ธฐ ์ „ Fast Path ์ฝ๊ธฐ, ํŒŒ์‹ฑ, ํ™•์žฅ์ด Interm. Interm. ์‰ฌ์›Œ์•ผ ํ•จ Interm. Models๋ฐ”์ด๋„ˆ๋ฆฌ๋Š” Anims ์—ฟ๋จน๋Š”๋‹ค Textures ๋ฌธ์ œ์  ์ถ”์  ๋ฐ ์ž„์‹œ ๋ณ€๊ฒฝ ํ…Œ์ŠคํŠธ๊ฐ€ ์šฉ์ด plain text๋‚˜ XML์„ ์ถ”์ฒœ Final Assets Build Build Build Path Platform A Platform B
  • 9. Source Assets 3D tool Image tool + plug-ins + plug-ins Model Textures Animations Fast Path Intermediate Assets Exporters Exporters ๊ฒŒ์ž„ ์—”์ง„์œผ๋กœ ๋กœ๋“œํ•  ์ˆ˜ ์žˆ์Œ ์ „์ฒด ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ๊ฑฐ์น˜์ง€ ์•Š๊ณ  Fast Path Interm. Interm. Interm. Models Anims Textures ํšจ์œจ์„ฑ ํ–ฅ์ƒ์— ํ•ต์‹ฌ ์•„ํ‹ฐ์ŠคํŠธ์—๊ฒŒ ๋น ๋ฅธ ์ดํ„ฐ๋ ˆ์ด์…˜ ์ œ๊ณต Final Assets Build Build Build Path Platform A Platform B
  • 10. Source Assets 3D tool Image tool + plug-ins + plug-ins Model Textures Animations Intermediate Assets ํƒ€๊ฒŸ ํ”Œ๋žซํผ์— ๋งž๊ฒŒ ์ตœ์ ํ™”๋˜๊ณ  ๋ฌถ์ธ asset Exporters Exporters Fast Path ๋Œ€๋ถ€๋ถ„ binary ํŒŒ์ผ Interm. Interm. Interm. ModelsํŒŒ์‹ฑ์— ๋“œ๋Š”Anims ์‹œ๊ฐ„์„ ์ค„์ด๊ธฐ ์œ„ํ•ด CPU Textures Final Assets Build Build Build Path Platform A Platform B
  • 11. Asset pipeline overview Asset pipeline design Push or pull pipeline model COLLADA Conclusion
  • 12. ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ ์„ฑ๊ฒฉ view-only editing
  • 13. view-only ์นด๋ฉ”๋ผ ์œ„์น˜, ๋ผ์ดํŒ… ์กฐ๊ฑด ๋“ฑ ์ปจํŠธ๋กค์„ ๊ฐ€์ง asset ๋ณ€๊ฒฝ์€ ๋ถˆ๊ฐ€๋Šฅ. DCC์—์„œ๋งŒ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์žˆ๋‹ค editing asset์„ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์žˆ์–ด ๋น ๋ฅธ ๋ฐ˜๋ณต์ด ๊ฐ€๋Šฅ ํ•˜์ง€๋งŒ asset pipeline์ด ๋” ๋ณต์žกํ•ด์ง
  • 14. view-only์™€ editing ๊ฒฐํ•ฉ์ด ํ•„์š” ๋ชจ๋“  ํ”„๋กœ์ ํŠธ๋ฅผ ๋งŒ์กฑํ•˜๋Š” ๋งˆ๋ฒ• ๊ฐ™์€ ์†”๋ฃจ์…˜์€ ์—†๋‹ค source asset์— ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ๋‹ค๋Š” ๊ฒƒ๋งŒ ๋งŒ์กฑ์‹œํ‚ค๋ฉด ๋จ
  • 15. ์™œ intermediate asset์ด ํ•„์š”ํ•œ๊ฐ€? source asset๊ณผ final asset ๊ฒฐํ•ฉ ์ œ๊ฑฐ ํฌ๋กœ์Šค ํ”Œ๋žซํผ asset ์ƒ์„ฑ์ด ์‰ฝ๋‹ค
  • 16. source asset๊ณผ final asset ๊ฒฐํ•ฉ ์ œ๊ฑฐ DCC์—์„œ exportํ•  ๋•Œ final asset์„ ๋ฐ”๋กœ ๋งŒ๋“ค๋ฉด ์—”์ง„ ๋ณ€๊ฒฝ์— ์˜์กดํ•˜๊ฒŒ ๋˜์–ด์„œ re-export๊ฐ€ ๋นˆ๋ฒˆ ํ”„๋กœ๊ทธ๋ž˜๋จธ์™€ ์•„ํ‹ฐ์ŠคํŠธ ์ž‘์—… ๊ฒฐํ•ฉ๋„ ์ค„์ž„ ๋””๋ฒ„๊น…๊ณผ ์‹คํ—˜์€ intermediate asset์„ ์‚ฌ์šฉ
  • 17. ํฌ๋กœ์Šค ํ”Œ๋žซํผ asset ์ƒ์„ฑ์ด ์‰ฝ๋‹ค intermediate asset ๊ฐ€๊ณต๋งŒ ์ƒ๊ฐํ•˜๋ฉด ๋œ๋‹ค
  • 18. Asset pipeline overview Asset pipeline design Push or pull pipeline model COLLADA Conclusion
  • 19. Push model ์ „ํ†ต์ ์ธ ๋ฐฉ๋ฒ• ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ํ˜ธ์ถœํ•ด intermediate๋‚˜ final asset ์ƒ์„ฑ ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ๋กœ ๋กœ๋“œ Pull model ๋” ์ง„๋ณด๋œ ๋ฐฉ๋ฒ• ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ์—์„œ intermediate๋‚˜ final asset ๋กœ๋“œ UI ์ง€์›์ด๋‚˜ ๋ณ€๊ฒฝ๋œ ํŒŒ์ผ์„ ๊ฐ์‹œํ•ด์„œ ๊ตฌํ˜„
  • 20. ๋ชจ๋“  ์ •๋ณด๋Š” source asset์— ์žˆ์–ด์•ผ ํ•จ ์ˆ˜์ • ์‚ฌํ•ญ์ด ๋ชจ๋‘ ๊ธฐ๋ก๋˜๊ธฐ ์œ„ํ•œ ์ œํ•œ intermediate asset ๋ณ€๊ฒฝ ์‚ฌํ•ญ์ด source asset์— ๋ฐ˜์˜ editing๊ณผ pull ๊ฒฐํ•ฉ ๊ฒŒ์ž„ ์—”์ง„ ์—๋””ํ„ฐ๊ฐ€ ๋ณ€๊ฒฝํ•œ ๊ฒŒ source asset์— ๋ฐ˜์˜๋˜๊ณ  ์ƒ์„ฑ๋œ intermediate asset์„ ๋‹ค์‹œ ์ฝ์–ด ๋“ค์ž„ remote control ์‹œ์Šคํ…œ์ด ํ•„์š”
  • 21. Remote Control Animation Modeling Normal Map Texturing Tool Tool Tool Tool Source Source Source Source Export Export Export Export Asset Asset Asset Asset Intermediate Asset Cache Fast Path Build Final Asset Cache Build Path Game Engine Editor
  • 22. Asset pipeline overview Asset pipeline design Push or pull pipeline model COLLADA Conclusion
  • 23. SIGGRAPH 2004์—์„œ ์ฒ˜์Œ ์†Œ๊ฐœ open standard ๋งŽ์€ DCC tool์ด ์ง€์› 3ds max, maya, google sketchup, โ€ฆ ๋งŽ์€ ๋ฐ์ดํ„ฐ ์ •์˜ ์ง€์› geometry, animation, skinning, morphing, physics, โ€ฆ
  • 24. <source id=โ€œmesh-geometry-positionโ€> <float_array id=โ€œmesh1-geometry-position-arrayโ€ count=โ€œ24โ€> 2518.1875 4074.512965 0. 2518.1875 0. โ€ฆ </float_array> <technique_common> <accessor source=โ€œmesh1-geometry-position-arrayโ€ count=โ€œ8โ€ stride=โ€œ3โ€> <param name=โ€œXโ€ type=โ€œfloatโ€/> <param name=โ€œYโ€ type=โ€œfloatโ€/> <param name=โ€œZโ€ type=โ€œfloatโ€/> </accessor> </technique_common> </source>
  • 25. intermediate asset format์œผ๋กœ ์ถ”์ฒœ self-described data ๋งŽ์€ DCC tool์—์„œ ์ง€์› ์ด ์šฉ๋„๋กœ ์“ฐ๋ ค๊ณ  ๋งŒ๋“ค์–ด์„œ ๋งŒ๋“ค์–ด์ง„ ๊ฒŒ ๋งŽ๋‹ค <library_xx>, <param>, URI technology, โ€ฆ
  • 26. Asset pipeline overview Asset pipeline design Push or pull pipeline model COLLADA Conclusion
  • 27. asset pipeline์€ ๊ฐœ๋ฐœ backbone ์•ˆ ๋˜๋ฉด ๊ณ ์ณ์งˆ ๋•Œ๊นŒ์ง€ ๊ฐœ๋ฐœ์ด ์ค‘์ง€ source asset์— ๋ชจ๋“  ์ •๋ณด๊ฐ€ ์žˆ์–ด์•ผ ํ•จ source asset๋งŒ ๋ฒ„์ „ ์ปจํŠธ๋กค ์ˆ˜์ •๋œ ์‚ฌํ•ญ์„ ์žƒ์–ด๋ฒ„๋ฆฌ๋Š” ์ผ์ด ์—†๋‹ค
  • 28. ํšจ์œจ์ ์ธ ๊ฐœ๋ฐœ์„ ์œ„ํ•œ Fast Path ํ•˜๋‚˜ ํ™•์ธ ํ•˜๋ ค๊ณ  ๊ธด ๋นŒ๋“œ ํ”„๋กœ์„ธ์Šค๋ฅผ ๊ธฐ๋‹ค๋ ค์•ผ ํ•ด? ์•„ํ‹ฐ์ŠคํŠธ๊ฐ€ ํ•˜์–—๊ฒŒ ๋ถˆํƒœ์šธ ์ˆ˜ ์žˆ๋„๋ก ํ•˜์ž COLLADA intermediate asset format์œผ๋กœ ์“ฐ๋ ค๊ณ  ๋งŒ๋“ค์—ˆ๋‹ค ์™ ๋งŒํ•œ ๋ฐ์ดํ„ฐ๋Š” ๋‹ค ๊ธฐ์ˆ ๋˜์—ˆ์Œ ๋งŽ์€ DCC tool์—์„œ ์ง€์› ์“ฐ๋Š” ๊ฑธ ์ ๊ทน ๊ณ ๋ ค