danny couture c23f6884fe Async Static Mesh Compilation / Loading ...

- Add protection against async property accessed during async build and postload.
   - Split PostLoad into 3 steps with the most part now being made async.
   - Make Build/BatchBuild API async when the feature is activated.
   - Add a new StaticMesh compilation manager. (This will be refactory later to reduce duplicated code with texture compiler).
   - Skip RenderState creation for any static mesh component still being built so they only show up when ready.
   - Fixed DistanceField and MeshCard computation that might trigger too soon if fixups are required to RenderData during PostLoad.
   - Dynamic priorisation for building and updating static meshes nearest to the viewport.
   - Implement different PIE modes, current default is to stall only for mesh that might affect nagivation/collision for players/bots.
   - Add a new generic interface for assets being built (still a WIP).
   - Add ability in FrontEnd filters to skip serialization of asset being async compiled and refresh when compilation finishes.
   - Prevent auto-save while textures and static meshes are being built (same as shaders)
   - Logic has been reordered in some Fortnite Building Component to avoid unnecessarily touching static mesh properties.

General Optimizations
   - Use cached thumbnails until shaders/textures/static meshes are ready to improve performance and avoid rendering incomplete thumbnails.

DEBUGGING
 - Can be forcibly enabled/disabled through command-line via -asyncstaticmeshcompilation=[off, on, paused]
 - Can pause staticmesh compilation using Editor.AsyncStaticMeshCompilation = 2 or -asyncstaticmeshcompilation=paused
 - Can manually resume a specified amount of paused compilation using Editor.AsyncStaticMeshCompilationResume [Num]
 - Can forcibly wait on all compilation using Editor.AsyncStaticMeshCompilationFlushAll

BENCHMARKS
 - 2m19s to 17.9s for Loading FortGPUTestbed's LumenTest with an empty local only DDC
 - 2h45m to 5mxxs for Loading Reverb's P_World with an empty local only DDC
 - 17m29 to 10m27s for Loading Apollo_Terrain_Edit with an empty local only DDC

TESTS
 - Loading maps from Reverb, Fortnite, ShooterGame, QAGame, FortGPUTestbed
 - Content browser interactions while still under heavy compilation
 - Importing with Datasmith / Dataprep
 - Working with the new Mesh Modeling Tool
 - Shutting down the editor while loading
 - Most of EngineTest Test Suite

REFERENCES
 - Design https://docs.google.com/document/d/1O4GI1G9AtQN6l0SaGFfXw0DyNhlLunLoEqne5INvxIQ
 - Documentation https://docs.google.com/document/d/1KCdFEMhhcsGwfgOisTVwlOwtsmEd7qbB0V6Tc39Gb10

#rb Francis.Hurteau

[CL 14688146 by danny couture in ue5-main branch]

2020-11-09 07:50:34 -04:00

7.7 KiB

Raw Blame History

View Raw