2018TGDC???UE4????????????

D??

?2018TGDC??????Epic Games?????????????????UE4??????????????????????10????????????console??????PC?MMO????????????????????Epic Games China????????????????????????UE3?UE4??????????????????

???????????Epic Games?????????????????????????????????????????????????????????????????????????????????????????????????????????UE4?????????????????

???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

?????????????????????????????????????????????????????????????????????????????LOD???????????????????????????????????????????????

?????????????????????LOD??????????Significance Manager?????????????Bucket???????????????????????????????????????????????????????????????????????????????bucket??????????????????????????????????????????Bucket???????????Bucket??????????LOD???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Bucket????????????????Bucket?????????????????????????????????????????????????????????????????????Device profile????????Bucket????

????????????????????????????????????????????????????????????????????????????????????????????????Fortnite??????????????????50V50??????????????????????50??80?????????????????????????????????????????????????????????

???????????????????????????????????????????????Mesh???????????????????????????????????????????????????????????Fortnite??????????????????????????????????Socket???????????????Master Slave?????????????????????????????????????????????????????????????????????Master??????????????Master???????????????Master Skeleton?????????????????????????????????????????????????????Copy Pose?????????????????????????????????????????????????????????????????????????????????????????????????setup?????????????????????????LOD???????????????

???????????????????????????????????Event Graph???UE4????????????Event Graph????????????????????????????????????????????????Event Grape??C++?????????

?????Anim Graph???????????????????????????????????????????IK????????POSE????????????????????????????Graph?????????????????????????????????????????????????????????????????????????????????????????????????Fast Path???????????????????????????Fast Path???????????????

??????????????????????????????????????????????????????????????????????????????????????????Event Graph?????????????AnimInstanceProxy?????????????Event Graph????????????????????Fast Path??????????update?evaluation???working thread???????50????????????????????????????????????

???????????????????????????????????????????????????????? Tick pose??????Singnificance Manager??????????????????????????????????????????????

???????????????????????????????Dynamic Path??????????????????????????????????Drawing Policy???????????????????????????????????????InitViews?????????????????????????????????????????????????????????????????????????????????????StaticRenderPath????????????

URO?Update Rate Optimization?????????????????????????????????????POSE?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

??????????????????????????LOD???????AnimGraph???????????????LOD????????IK??????

????????????????????Scene Component?Scene Component????????????????Transform????????????????????????????????????????????Scene Component???????????????????Scene Component??????????????????????????????????????????????????Scene Component????????

??Auto Manage Attachment,?????????,???????????????????????Scene Component???Detach????Transform???????

?Scene Component????????????Overlap????????????????????Overlap???????????????????????????Overlap????????????????????????????????Component????overlap??????????????????Overlap?????????????????????????Overlap?????????????????????????????????????????????????????????????

Character Movement???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Significance Manager?Bucket??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

Physics??????????????Physics??????????????????????????????????????????volume????????????????????????????????????????????Query??????Simulation?????????????????????????????????????????????????????????????????????????????????Physics????????????????Shared Shape?????Async Scene???????????????????????scene?????query?

??????????mesh????????Shared shapes????????????????????????????????????????????????????????????????Mesh???????????????PhysX Scene??????????????????????????Mesh?????????????????????????????????????????????????????????????????????????????????????????????????????Component?Actor??????Streaming Level??????????????????????????????????????????????????????????????????????????????????????????NvCloth?lib???????????????

Ticking???????????????????????????????GamePlay???????Event Graph?Tick?????????????????????Tick???????????????????????????????????????C++??????????Tick????????????????????????????????????????????????????????Tick??????????????

????????TextureStreaming??????????????????????????????????????????GPU?????????????Wanted Mip????????????????????????????Texture Streaming?????????

UI?????HUD????UI????????????????????????????????????????SlatLayoutCaching?Invalidation Box?Cache Prepass??widget transform????????Cache????????????????????????Buffer Cache??????????????UI?Widget??Batching?????????????????????????Horizental?Vertical Box?Grid????????????????????Batch???????????Canvas Panel???????????????????????Implicit Zorder????????????????Widget??????????????ZOrder???Batch????????????????????????????????????????????????????????????????????????Texture Altas?????????????Vertex Color??Vertex Shader???VC????uv???????????Batching???

????????????????????????????????????????????????????????????????????????????????????SoundCue????????SoundSource??????SoundSource??????????16????????32???????????SoundCue???????SoundWave????????????????????????????SoundWave????????????????????????????????????????????????????????LOD????????????CPU?????????Reverb?EQ???????????Wave?????

Particle????????Overdraw????PC????????Alpha?????????Overdraw????????????????????????????????SRV?????????????????????????????????????????RenderPass????????upscale?????overdraw??????fragment????

Level Streaming?????Level Streaming?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????Level Streaming?????????

IO?????????Worker thread?????????????????Event Driven Loader??IO?Deserialization?????????????????s.AsyncLoadingThreadEnabled?????ALT????????Postload???????????????????????????????????Time Slice???????????????PostLoad????????????????????ALT???????Level Streaming????

???????????????????????????????????????Replication Graph?????????ServerReplicateActors????????????PerConnection?PerActor?relevancy??priority????????Net Actor???????????grid????????Connection?????Grid?????????????Replication????????????Connection???????????Cache????replicate?????????connection??????????????????????????CPU???replication????????1/4?

?????????????????????Net relevancy distance?????????RPC???????????????????????????????RPC??????????????????????????????

?????????????????????????????????????????????Server????????????????????????????Component?Server????

?????????????????????????????????????????????????????????????????????????????????????Primitive???????????????????????????????????????????????Streaming Level????Scene Tranversal?????????????????????????????????????????????????????????????????????????Static Render Path?????????

??????????Culling???????Precomputed visibility Volume????????????????????????????runtime???????tradeoff?????????????????????????????????????????Culling???????occlusion??????????????ES3.1????????Hardware occlusion query??3.1????????????Software occlusion??????????????????????????????????????bounds transform?CPU????????occlude??????

???????????????Draw Calls???DC????????????????foliage????????????????????????????HISCM???gpu instancing????DC????????????HLOD??????Mesh????????????Proxy Mesh?????LOD????????????Mesh???????????Draw Call???????????HLOD????????LOD???????DrawCall????????????????????????????

Dynamic Instancing?????????????????Studio????????????????????????pipeline?????????????????????????Dynamic Instancing??????????????instancing?????????????????

?????DrawCall?????????????????????????????Drawing Policies?????????????Drawing Policies?????????????????????????????????????????????????????????????????gpu?overdraw????????mesh draw command pipeline????????????????????????????????????????????????????????????????????????????????????cpu?????????????????????GPU??

RHI Thread??OpenGL ES??GraphicAPI??????glcontext???????????????gl command?enqueue?????RHI Thread??????????????????????????????????????????????frame time???????????????????????????????????????

????????????Hitches??????????

Loading????????streaming level?????????????????????????????????????????????Flush??????????????????????????????????????????????????????????????????????Actor????????Actor Channel??????Spawn Actor??????????????????flush?????????????net.AllowAsyncLoadingEnabled?????????????????????Actor Channel????????????pending???????????????????????????

Compile Shader???ogl es?????shadercache????????ShaderCache??????????ShaderPipelineCache???????????????????????????????Shader???????????Log????Runtime?????????log????????Compile????runtime??compile?????????compile????????ProgramBinaryCache????????link??program????????????Shader??????????link program????????program????????compile?link????????shader code??????????????compile???cache?????warmup???????????????????????

Spawning???spawn??????????components???????????C++?Component?????BP components?????????????????cook????components???????????????spawn????????????????????Component?????????????????????spawn????????pooling?????????Actor?Spawn???????

GC????????????????????????destruct???????????BeginDestroy?????Destroy???????????????????????????????????????render fence???????????????????purge????????????GC???????????????????????????????????????????????????????????????????????????????????????????????????????????MaxObjectNotConsideredByGC??????????????????????????????????Clustering?????????????????Clustering?????????GC????????????????????BeginDestroy??????GC???????

???????????GPU?

????????????????MobileContentScaleFactor??BackBuffer????????????r.ScreenPercentage????3D??????????????????GPU???????????????pixel shader bound????????????????????????SceneColor??????HDR?????FP16?RGBA????????????r.Mobile.SceneColorFormat????R11G11B10??RGBE??????????????????????????DepthBuffer????DepthStencil fetch???????????????????Depth??SceneColor?A???????R11G11B10?????????????????????feature?????

??????shader??????????Quality Switch?????????????????????????fully rough?non metal????????????????????????shader permutation???????????????

Shadow????????Modulate shadow???????????????????shadow volume????????shadow map?????????????????????????????CSM???????shadow???????????????????????????Device Profile???????????????shadow???????????PCF filtering????????filtering??????

Landscape????????????????????LOD????????????????????????shader???????????????????????????????????????????weightmap?normal??????????????????????????????????pixel shader???????????????????????

Base Pass pixel shader?????????????sky light?refleciton?????????Specular???GGX???GGX?????????NoH??1??????????????????????MobileBasePassPixelShader??????????????????????????IBL??lightmap??shadowmap????

??????????????????????

Mask???????????????????depth????????clip/discard????earlyz???????overdraw????????prepass?mask?basepass?z equel?????????LOD transition????LOD??????????????LOD???????????dither?mask???????????????????mask?????????LOD???dither?????Stencil??BasePass??stenciltest??????discard?

??????????

????????????????????????????Bucket???????????????????????Memory Bucket???

??Streaming Level?????????????????Texture Streaming???????????IOS???????Apple?GL????????????????????????????????????cpu?????bounds?????�???????????uv scale??�???????tweak?scalar???????????mip?????r.Streaming.PoolSize?????????????????????Budget?

Shader code??????Shared Shader code?????????????????Shader???????????Shader code??ShaderLibrary????MaterialInstance?????ShaderCode?GUID?????????ShaderCode?????????????80%????????rendering????????????????????shader????????

RHI?UI???????????????????CDO?Class Default Object??????GC????????????????????????Slate altas Size?????????????????????GPU Particle????????fx.AllowGPUParticles??????????128?1024?RT?gpu particle?position?velocity????60????????FSlateRHIResoureceManage?FrenderTargetPool?polling????????????????????????????????????????

?????????????UniformBuffer???????gles??????????????????????????ES3???pack??UniformArray????

?????????????????????????????????clang?TCHAR?4?????????????????????????????????

?????????????????????????

?????????scalability????????????????????Scalability Group???????????????????????????????????????????????????????????Device profile?????????????????????scalability???????????????????????   

?????Device Profile????iPhoneX???????iPhoneX???????IOS????????override??ios??????IOS??IOS????????Profile??????????????????????Device Profile??????????Selector?????????????????????????SoC?GPU Family?Device Module??GL Version??

????????Iterating??????????????Cook?cook???????????????????????????????????????????????????????????commandlet???server??????????????????????????????cook?????????????????cook on the fly??????????????????????-iterate?????????????load???save????????????????????????DDC?Derived Data Cache??????????????????????????-iterate??????????????????load+save????ini??????????????????????cook???????load/save??????????????????????????????????????????cook?????????????????????????????????????????????push??UE4Commandline.txt????????????????????

Debug?????????????????????????Android Studio?debug?????debug native?java????native?????????vs????UBT?????build.gradle???Android Studio???????????????android studio?????debug??????????

Profiling???gpu????profiling?????gpu????????????????????????stat???????showflag???????????????cpu?profiling?????????????????????framepro??????????overhead???namedevent?profiling??????????????????Profiling?????????????profiling???????Memreport?llm???????Memory Profiler?????????????????????????????

???????????????