深入浅出UE4网络

1.Actor Replication

2.Property Replication

3.Function Call Replication

4.Actor Component Replication

5.Generic Subobject Replication

1.Detailed Actor Replication

1.Actor Replication

2.Property Replication

3.Function Call Replication

 1 void AShooterCharacter::FlyDown()  2 {  3     if (this->Role < ROLE_Authority)  4     {  5         ServerFlyDown();  6     }  7     if (!GetCharacterMovement()->IsMovingOnGround() && !GetCharacterMovement()->IsFalling())  8     {  9         GetCharacterMovement()->SetMovementMode(MOVE_Falling); 10     } 11 }

UENUM() enum ENetRole {     /** No role at all. */     ROLE_None,     /** Locally simulated proxy of this actor. */     ROLE_SimulatedProxy,     /** Locally autonomous proxy of this actor. */     ROLE_AutonomousProxy,     /** Authoritative control over the actor. */     ROLE_Authority,     ROLE_MAX, };

 1 void UActorChannel::ProcessBunch( FInBunch & Bunch )  2 {  3         //......  4     // Owned by connection's player?  5     UNetConnection* ActorConnection = Actor->GetNetConnection();  6     if (ActorConnection == Connection || (ActorConnection != NULL && ActorConnection->IsA(UChildConnection::StaticClass()) && ((UChildConnection*)ActorConnection)->Parent == Connection))  7     {  8         RepFlags.bNetOwner = true;  9     } 10         //......     11 }

1 UFUNCTION( Client ); 2 void ClientRPCFunction();

Server

1     UFUNCTION(reliable, server, WithValidation) 2     void ServerFlyUp();

NetMulticast

1 UFUNCTION( NetMulticast,unreliable ); 2 void MulticastRPCFunction();

1 void AShooterCharacter::ServerFlyUp_Implementation() 2 { 3     FlyUp(); 4 }

1 void AShooterCharacter::FlyUp() 2 { 3      if (this->Role < ROLE_Authority) 4      { 5          ServerFlyUp(); 6      } 7       //implement character fly up 8        //.......   9  }    

1 bool AShooterCharacter::ServerFlyUp_Validate() 2 { 3     return true; 4 }

4.Actor Component Replication

AActorComponent::SetIsReplicated(true)

 1 ACharacter::ACharacter()  2 {  3     // Etc...  4   5     CharacterMovement = CreateDefaultSubobject<UMovementComp_Character>(TEXT("CharMoveComp"));  6     if (CharacterMovement)  7     {  8         CharacterMovement->UpdatedComponent = CapsuleComponent;  9         CharacterMovement->GetNavAgentProperties()->bCanJump = true; 10         CharacterMovement->GetNavAgentProperties()->bCanWalk = true; 11         CharacterMovement->SetJumpAllowed(true); 12         CharacterMovement->SetNetAddressable(); // Make DSO components net addressable 13         CharacterMovement->SetIsReplicated(true); // Enable replication by default 14  15     } 16 }

Replicates

SetIsReplicated

5.Generic Subobject Replication

 1 //ReplicatedSubobject.h  2 UCLASS()  3 class UReplicatedSubobject : public UObject  4 {  5     GENERATED_UCLASS_BODY()  6    7 public:  8    9     UPROPERTY(Replicated) 10     uint32 bReplicatedFlag:1; 11   12     virtual bool IsSupportedForNetworking() const override 13     { 14         return true; 15     } 16 };

 1 //ReplicatedSubobject.cpp  2 UReplicatedSubobject::UReplicatedSubobject(const class FPostConstructInitializeProperties& PCIP)  3 : Super(PCIP)  4 {  5 }  6    7 void UReplicatedSubobject::GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const  8 {  9     DOREPLIFETIME(UReplicatedSubobject, bReplicatedFlag); 10 }

 1 UCLASS()  2 class AReplicatedActor : public AActor  3 {  4     GENERATED_UCLASS_BODY()  5    6 public:  7    8     virtual void PostInitializeComponents() override;  9     virtual bool ReplicateSubobjects(class UActorChannel *Channel, class FOutBunch *Bunch, FReplicationFlags *RepFlags) override; 10   11     /** A Replicated Subobject */ 12     UPROPERTY(Replicated) 13     UReplicatedSubobject* Subobject; 14   15 private: 16 };

 1 #include "ReplicatedActor.h"  2 #include "UnrealNetwork.h"  3 #include "Engine/ActorChannel.h"  4 AReplicatedActor::AReplicatedActor(const class FPostConstructInitializeProperties& PCIP)  5 : Super(PCIP)  6 {  7     bReplicates = true;  8 }  9   10 void AReplicatedActor::PostInitializeComponents() 11 { 12     Super::PostInitializeComponents() 13   14     if (HasAuthority()) 15     { 16         Subobject = NewObject<UReplicatedObject>(this);  17     } 18 } 19   20 bool AReplicatedActor::ReplicateSubobjects(class UActorChannel *Channel, class FOutBunch *Bunch, FReplicationFlags *RepFlags) 21 { 22     bool WroteSomething = Super::ReplicateSubobjects(Channel, Bunch, RepFlags); 23   24     if (Subobject != nullptr) 25     { 26         WroteSomething |= Channel->ReplicateSubobject(Subobject, *Bunch, *RepFlags); 27     } 28   29     return WroteSomething; 30 } 31   32 void AReplicatedActor::GetLifetimeReplicatedProps(TArray< FLifetimeProperty > & OutLifetimeProps) const 33 { 34     DOREPLIFETIME(AReplicatedActor, Subobject); 35 }

1.Detailed Actor Replication

• AActor::NetUpdateFrequency

• AActor::PreReplication

• AActor::bOnlyRelevantToOwner

• AActor::IsRelevancyOwnerFor

• AActor::IsNetRelevantFor

UChannel::ReplicateActor

文章来源: 深入浅出UE4网络