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          NetworkPrediction

          Windows
          MacOS
          Linux

          Filters

          Classes

          Name

          Description

          Public struct

          AuthorityOnly

          Will only play on the authority path and not replicate to anyone else.

          Public struct

          FConditionalAutoConsoleRegister

          This is required because these cvars live in header files that will be included across different compilation units Just using standard FAutoConsoleVariableRef will cause multiple registrations of the same variable

          Public struct

          FCueDispatcherTraitsBase

          Traits for TNetSimCueDispatcher .

          Public class

          FGlobalCueTypeTable

          GlobalCueTypeTable: Cue types register with this to get a Type ID assigned.

          Public struct

          FLogCategoryLogNetInterpolation

          Public struct

          FLogCategoryLogNetworkSimDebug

          Public struct

          FNetSerializeParams

          The parameters for NetSerialize that are passed around the system. Everything should use this, expecting to have to add more.

          Public struct

          FNetSimCueCallbacks

          Callbacks

          Public struct

          FNetSimCueDispatcher

          Non-templated, "networking model independent" base: this is what the pure simulation code gets to invoke cues.

          Public struct

          FNetSimCueSystemParamemters

          System parameters for NetSimCue events

          Public struct

          FNetSimCueWrapperBase

          Wrapper: wraps the actual user NetSimCue.

          Public class

          FNetSimModelDefBase

          Base for Network Simulation Model Defs (defines types used by the model)

          Public struct

          FNetSimProcessedFrameDebugInfo

          Public struct

          FNetSimTickParameters

          Ticking parameters use to drive the simulation

          Public struct

          FNetSimTimeStep

          FNetSimTimeStep Time data structure that is passed into SimulationTick

          Public struct

          FNetworkSimTime

          The main Simulation time type. All sims use this to talk about time.

          Public struct

          FNetworkSimulationModelDebuggerManager

          Public struct

          FNetworkSimulationModelInitParameters

          Public struct

          FNetworkSimulationSerialization

          Public struct UStruct

          FReplicationProxy

          FReplicationProxy Replicated USTRUCT that point to the IReplicationProxy to do the replication.

          Public struct

          FSavedCue

          SavedCue: a recorded Invocation of a NetSimCue

          Public struct

          FScopedBandwidthLimitBypass

          Helper struct to bypass the bandwidth limit imposed by the engine's NetDriver (QueuedBits, NetSpeed, etc).

          Public struct UStruct

          FServerReplicationRPCParameter

          FServerRPCProxyParameter Used for the client->Server RPC.

          Public struct

          FSimulationTickState

          FSimulationTickState : Holds active state for simulation ticking.

          Public struct

          FStandardLoggingParameters

          Public struct

          FVisualLoggingHelpers

          Public struct

          FVisualLoggingParameters

          Public struct

          HasLog

          Public struct

          HasNetSerialize

          Public class

          INetworkedSimulationModel

          Public class

          INetworkPredictionModule

          Public struct

          INetworkSimulationModelDebugger

          Debugger support classes

          Public class

          IReplicationProxy

          Interface that the proxy talks to. This is what will implement the replication.

          Public struct

          NonReplicatedResimulated

          Non replicated but if a resimulate happens, the cue is undone and replayed.

          Public struct

          ReplicatedNonPredicted

          Only invoked on authority and will replicate to everyone else.

          Public struct

          ReplicatedXOrPredicted

          Replicated to interpolating proxies, predicted by autonomous/simulated proxy Best for events you want everyone to see but don't need to get perfect in the predicting cases: doesn't need to rollback and cheap on cpu (no NetIdentical tests on predicted path)

          Public struct

          Strong

          Invoked and replicated to all.

          Public struct

          TBufferGetterHelper

          Helper struct for enum-based access. This has to be done in an outside struct because we cant specialize inside TNetworkSimBufferContainer on all compilers.

          Public struct

          TCueDispatcherTraits

          Public class

          TCueDispatchTable

          Per-Receiver dispatch table. This is how we go from a serialized ID to a function call

          Public struct

          TFrameCmd

          Wraps an input command (BaseType) in a NetworkSimulation time.

          Public struct

          THasNetIdenticalHelper

          Helper to compile time check if NetIdentical exists (since argument is template type, must be wrapped in helper struct)

          Public struct

          THasNetSimCueTraits

          Helper to see if T has a Traits type or not.

          Public struct

          TInternalBufferTypes

          "Internal" Buffers: Helper to turn user supplied buffer types into the "real" buffer types: the InputCmd struct is wrapped in TFrameCmd Outside/User code will always use the user supplied buffer types in callbacks/APIs etc Internal code to the TNetworkedSimulationModel will use the internal buffer types

          Public struct

          TInterpolatorParameters

          Public struct

          TNetCueNetIdenticalHelper

          Helper to call NetIdentical if type defines it.

          Public struct

          TNetCueNetSerializeHelper

          Helper to call NetSerialize if type defines it.

          Public struct

          TNetSimCueDispatcher

          Templated cue dispatcher that can be specialized per networking model definition. This is what the system actually uses internally, but is not exposed to user code.

          Public struct

          TNetSimCueHandlerAutoRegisterHelper

          Register a handler's cue types via a static "RegisterNetSimCueTypes" on the handler itself

          Public struct

          TNetSimCueSetHandlerAutoRegisterHelper

          Register a handler's cue types via an intermediate "set" class with a static "RegisterNetSimCueTypes" function

          Public struct

          TNetSimCueTraits

          Actual trait struct that we use to look up traits.

          Public struct

          TNetSimCueTraitsExplicit

          Explicit trait settings. This can be used to explicitly set your traits without using a preset.

          Public struct

          TNetSimCueTypeAutoRegisterHelper

          Register a cue type with the global table.

          Public struct

          TNetSimCueTypeRequirements

          Type requirements: helper to determine if NetSerialize/NetIdentical functions need to be defined for user types based on the above traits.

          Public struct

          TNetSimCueWrapper

          Public struct

          TNetSimInput

          Input state: const references to the InputCmd/SyncState/AuxStates.

          Public struct

          TNetSimInterpolator

          Public struct

          TNetSimLazyWriter

          Reference version of LazyWriter. This is what gets passed through chains of ::SimulationTick calls. This is to avoid copying the TFunction in TNetSimLazyWriterFunc around.

          Public struct

          TNetSimLazyWriterFunc

          Helper struct to encapsulate optional, delayed writing of new element to buffer.

          Public struct

          TNetSimModelRepControllerTraits

          Template struct to specialize per-model.

          Public struct

          TNetSimModelRepControllerTraitsBase

          Traits for which RepController structs are used internally.

          Public struct

          TNetSimModelTraits

          Public struct

          TNetSimModelTraitsBase

          Internal traits that are derived from the user settings (E.g, these can't go in FNetSimModelDefBase because they are dependent on the user types) These can be overridden as well via template specialization but we don't expect this to be common.

          Public struct

          TNetSimOutput

          Output state: the output SyncState (always created) and TNetSimLazyWriter for the AuxState (created on demand since every tick does not generate a new aux frame)

          Public struct

          TNetSimStateAccessor

          Accessors - helper structs that provide safe/cleaner access to the underlying NetSim states/events This is the equivlent of directly calling TNetworkedSimulationModel::GetPendingStateRead() / GetPendingStateWrite()

          Public class

          TNetworkedSimulationModel

          The actual NetworkedSimulationModel templated class.

          Public class

          TNetworkedSimulationModelDriver

          Copyright Epic Games, Inc. All Rights Reserved.

          Public struct

          TNetworkSimBufferBase

          Common implementations shared by TNetworkSimContiguousBuffer/TNetworkSimSparseBuffer.

          Public struct

          TNetworkSimBufferContainer

          The main container for all of our buffers.

          Public struct

          TNetworkSimBufferIterator

          Generic iterator for iterating over each frame from tail to head.

          Public struct

          TNetworkSimBufferTypes

          A collection of the system's buffer types. This allows us to collapse the 4 types into a single type to use a template argument elsewhere.

          Public struct

          TNetworkSimContiguousBuffer

          Public struct

          TNetworkSimSparseBuffer

          Frame: arbitrary identifier for data.

          Public struct

          TNetworkSimTickSettings

          Holds per-simulation settings about how ticking is supposed to happen.

          Public struct

          TNetworkSimulationModelDebugger

          Public struct

          TRealTimeAccumulator

          Accumulator: Helper for accumulating real time into sim time based on TickSettings

          Public struct

          TRepController_Autonomous

          Replicates TSyncState and does basic reconciliation.

          Public struct

          TRepController_Base

          Base implementation with minimal functionality: will grant simulation time and call finalize frame.

          Public struct

          TRepController_Debug

          Special replicator for debug buffer, this preserves the local buffer and receives into a replicator-owned buffer (we want these buffers to be distinct/not merged)

          Public struct

          TRepController_Empty

          Empty RepController: zero functionality, just stubbed out functions and using definitions for convenience.

          Public struct

          TRepController_Sequence

          Sequence replicator

          Public struct

          TRepController_Server

          Server Replication Controller (FIXME: should this be called something like "client autonomous proxy -> Server RPC" ?

          Public struct

          TRepController_SimTime

          Simulation Time replicator Just serializes simulation time.

          Public struct

          TRepController_Simulated

          Simulated: "non locally controlled" simulations.

          Public struct

          TScopedSimulationTick

          Scoped helper to be used right before entering a call to the sim's ::SimulationTick function.

          Public struct

          TSelectNetSimCueTraits

          Selects explicit traits set by T.

          Public struct

          TSelectTypeHelper

          Helper needed to specialize TNetworkSimBufferTypes::Get (must be done outside of templated struct)

          Public struct

          TSimulationTicker

          "Ticker" that actually allows us to give the simulation time. This struct will generally not be passed around outside of the core TNetworkedSimulationModel/Replicators

          Public struct

          TToVoid

          SFINAE helper.

          Public class UClass Abstract

          UNetworkPredictionComponent

          UNetworkPredictionComponent This is the base component for running a TNetworkedSimulationModel through an actor component.

          Public class UClass

          UNetworkSimulationGlobalManager

          Public struct

          Weak

          Non replicated cue that only plays during "latest" simulate.

          Public struct

          WeakClientsOnly

          Same as above but will play on all clients, just not the authority.

          Public struct

          WeakOwningClientOnly

          Same as above but will only play on the owning, autonomous proxy client (not on authority, not on simulated clients) Useful if the Cue is needed for only the controlling player, maybe like a HUD/UI notification pop

          Constants

          Typedefs

          Name

          Description

          Default

          Default Traits: if you do not explicitly set Traits on your class, this is what it defaults to.

          FNetSimCueTypeId

          Enums

          Name

          Description

          Public enum

          ENetSimCueInvoker

          High level "who can invoke this". Does not take resimulate into account yet. All combinations of this enum are valid (though Authority | SimExtrapolate is a bit weird maybe)

          Public enum

          ENetSimCueReplicationTarget

          Who a NetSimCue should replicate/be accepted by.

          Public enum

          ENetworkSimBufferTypeId

          Copyright Epic Games, Inc. All Rights Reserved.

          Public enum UEnum

          EReplicationProxyTarget

          Public enum UEnum

          ESimulatedUpdateMode

          Public enum

          ESimulationTickContext

          Copyright Epic Games, Inc. All Rights Reserved.

          Public enum

          EStandardLoggingContext

          Public enum UEnum

          EVisualLoggingContext

          Public enum

          EVisualLoggingLifetime

          Functions

          Name Description

          Public function

           

          ENUM_CLASS_FLAGS

          Public function

           

          ENUM_CLASS_FLAGS

          (
              ENetSimCueInvoker
          )

          Public function

           

          ENUM_CLASS_FLAGS

          Public function

          UObject *...

           

          FindReplicatedObjectOnPIEServer

          (
              const UObject * ClientObject
          )

          Public function

           

          GENERATE_MEMBER_FUNCTION_CHECK

          (
              NetSerialize,
              void ,
              FArchive &
          )

          Helper to compile time check if NetSerialize exists.

          Public function

          void

           

          GenerateLocalInputCmdAtFrame

          (
              typename TNetSimModelTraits < Model ...,
              TNetworkSimBufferContainer < Model >...,
              const FNetworkSimTime & DeltaSimTim...,
              int32 Frame,
              bool bProduceInputViaDriver
          )

          Helpers

          Public function Static

          constexpr ES ...

           

          GetSimTickMask

          (
              const ENetSimCueInvoker Invoker,
              const bool bAllowResimulate
          )

          Turns "Who can invoke this" + "Does this play during resimulate" into the final ESimulationTickContext mask we use at runtime. This is done so users can't make invalid configurations (like "Authority | Resimulate")

          Public function

          FString

           

          LexToString

          (
              ESimulatedUpdateMode A
          )

          Public function

          FString

           

          LexToString

          (
              EVisualLoggingContext A
          )

          Public function

          FString

           

          LexToString

          Public function

          FString

           

          LexToString

          Public function

          TEnableIf < T ...

           

          NetSimBufferSelect::Get

          (
              TContainer& Container
          )

          Public function

          TEnableIf < T ...

           

          NetSimBufferSelect::Get

          (
              TContainer& Container
          )

          Public function

          TEnableIf < T ...

           

          NetSimBufferSelect::Get

          (
              TContainer& Container
          )

          Public function

          TEnableIf < T ...

           

          NetSimBufferSelect::Get

          (
              TContainer& Container
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::CatchUpFactor()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::CatchUpFactorAuto

          (
              TEXT("ni.CatchUpFactor"),
              (float) 1. 50,
              TEXT("Factor we [use](API\Runtime\Engine\use) to catch up")
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::CatchUpGoal()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::CatchUpGoalAuto

          (
              TEXT("ni.CatchUpGoal"),
              (float) 0. 010,
              TEXT("When we stop catching up (sec...
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::CatchUpThreshold()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::CatchUpThresholdAuto

          (
              TEXT("ni.CatchUpThreshold"),
              (float) 0. 300,
              TEXT("When we start catching up (se...
          )

          Catchup means "interpolate faster than realtime".

          Public function

          int32

           

          NetworkInterpolationDebugCVars::Disable()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::DisableAuto

          (
              TEXT("ni.Disable"),
              (int32 ) 0,
              TEXT("Disables Network Interpolatio...
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetCatchUpFactor

          (
              float V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetCatchUpGoal

          (
              float V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetCatchUpThreshold

          (
              float V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetDisable

          (
              int32 V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetSnapGoal

          (
              float V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetSnapThreshold

          (
              float V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetVLog

          (
              int32 V
          )

          Public function

          void

           

          NetworkInterpolationDebugCVars::SetWaitSlack

          (
              float V
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::SnapGoal()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::SnapGoalAuto

          (
              TEXT("ni.SnapGoal"),
              (float) 0. 010,
              TEXT("Where we snap to")
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::SnapThreshold()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::SnapThresholdAuto

          (
              TEXT("ni.SnapThreshold"),
              (float) 0. 500,
              TEXT("If we are < this, we will sna...
          )

          Snap means "we are too far behind, just jump to a specific point".

          Public function

          int32

           

          NetworkInterpolationDebugCVars::VLog()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::VLogAuto

          (
              TEXT("ni.VLog"),
              (int32 ) 0,
              TEXT("Enables Network Interpolation...
          )

          Public function

          float

           

          NetworkInterpolationDebugCVars::WaitSlack()

          Public function Static

          FConditional ...

           

          NetworkInterpolationDebugCVars::WaitSlackAuto

          (
              TEXT("ni.WaitSlack"),
              (float) 0. 05,
              TEXT("How much slack to wait for wh...
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::EnableDebugBufferReplication()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::EnableDebugBufferReplicationAuto

          (
              TEXT("ns.DebugBufferReplication"),
              (int32 ) 1,
              TEXT("Replicate debug buffer (takes...
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::EnableLocalPrediction()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::EnableLocalPredictionAuto

          (
              TEXT("ns.EnableLocalPrediction"),
              (int32 ) 1,
              TEXT("Toggle local prediction.")
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::EnableSimulatedExtrapolation()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::EnableSimulatedExtrapolationAuto

          (
              TEXT("ns.EnableSimulatedExtrapolati...,
              (int32 ) 1,
              TEXT("Toggle simulated proxy extrap...
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::EnableSimulatedReconcile()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::EnableSimulatedReconcileAuto

          (
              TEXT("ns.EnableSimulatedReconcile"),
              (int32 ) 1,
              TEXT("Toggle simulated proxy reconc...
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::ForceReconcile()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::ForceReconcileAuto

          (
              TEXT("ns.ForceReconcile"),
              (int32 ) 0,
              TEXT("Forces reconcile even if stat...
          )

          Public function

          int32

           

          NetworkSimulationModelCVars::ForceReconcileSingle()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelCVars::ForceReconcileSingleAuto

          (
              TEXT("ns.ForceReconcileSingle"),
              (int32 ) 0,
              TEXT("Forces a since reconcile to h...
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetEnableDebugBufferReplication

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetEnableLocalPrediction

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetEnableSimulatedExtrapolation

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetEnableSimulatedReconcile

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetForceReconcile

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelCVars::SetForceReconcileSingle

          (
              int32 V
          )

          Public function

          int32

           

          NetworkSimulationModelDebugCVars::DrawCanvas()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelDebugCVars::DrawCanvasAuto

          (
              TEXT("nsm.debug.DrawCanvas"),
              (int32 ) 1,
              TEXT("Draws Canvas Debug HUD")
          )

          Public function

          int32

           

          NetworkSimulationModelDebugCVars::DrawFrames()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelDebugCVars::DrawFramesAuto

          (
              TEXT("nsm.debug.DrawFrames"),
              (int32 ) 1,
              TEXT("Draws frame data (text) in de...
          )

          Public function

          int32

           

          NetworkSimulationModelDebugCVars::DrawNetworkSendLines()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelDebugCVars::DrawNetworkSendLinesAuto

          (
              TEXT("nsm.debug.DrawNetworkSendLine...,
              (int32 ) 1,
              TEXT("Draws lines representing netw...
          )

          Public function

          int32

           

          NetworkSimulationModelDebugCVars::GatherServerSidePIE()

          Public function Static

          FConditional ...

           

          NetworkSimulationModelDebugCVars::GatherServerSidePIEAuto

          (
              TEXT("nsm.debug.GatherServerSide"),
              (int32 ) 1,
              TEXT("Whenever we gather debug info...
          )

          Public function

          void

           

          NetworkSimulationModelDebugCVars::SetDrawCanvas

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelDebugCVars::SetDrawFrames

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelDebugCVars::SetDrawNetworkSendLines

          (
              int32 V
          )

          Public function

          void

           

          NetworkSimulationModelDebugCVars::SetGatherServerSidePIE

          (
              int32 V
          )

          Public function

          void

           

          TryGenerateLocalInput

          (
              typename TNetSimModelTraits < Model ...,
              TNetworkSimBufferContainer < Model >...,
              TSimulationTicker < typename Model::...,
              bool bProduceInputViaDriver
          )

          Helper to generate a local input cmd if we have simulation time to spend and advance the simulation's MaxAllowedFrame so that it can be processed.

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