Change custom depth setting on client only

[Voidoz]

Hi,

I’m currently creating an interaction system in C++ and am having trouble making the outline only show on the client that can interact with the object.
My code looks like this:

CPP

void AHiderCharacter::Tick(float DeltaTime)
{
	HidePropOutline();
	LastProp = nullptr;

	FHitResult HitResult;
	bool bDidHit = GetPropInView(HitResult);
	if (bDidHit)
	{
		UStaticMeshComponent* Component = Cast<UStaticMeshComponent>(HitResult.GetComponent());
		LastProp = Component;
		ShowPropOutline();
	}
}

// ...

bool AHiderCharacter::GetPropInView(FHitResult& OutHitResult) const
{
	FVector Start = CameraBoomComponent->GetComponentLocation();
	FVector End = Start + (DetectPropDistance * CameraBoomComponent->GetForwardVector());
	FCollisionShape Sphere = FCollisionShape::MakeSphere(DetectPropRadius);

	return GetWorld()->SweepSingleByChannel(
		OutHitResult,
		Start, End,
		FQuat::Identity,
		ECollisionChannel::ECC_GameTraceChannel2,
		Sphere
	);
}

void AHiderCharacter::ShowPropOutline_Implementation()
{
	FString Name = GetActorNameOrLabel();
	GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Yellow, Name);
	if (IsValid(LastProp))
	{
		LastProp->SetCustomDepthStencilValue(1);
		LastProp->SetRenderCustomDepth(true);
	}
}

void AHiderCharacter::HidePropOutline_Implementation()
{
	if (IsValid(LastProp))
	{
		LastProp->SetRenderCustomDepth(false);
	}
}

H

// ...

	UPROPERTY(VisibleAnywhere)
	UCameraComponent* CameraComponent;

// ...

private:
	UPROPERTY(EditAnywhere)
	float DetectPropDistance = 300;

	UPROPERTY(EditAnywhere)
	float DetectPropRadius = 20;

	UStaticMeshComponent* LastProp;

	bool GetPropInView(FHitResult& OutHitResult) const;

	UFUNCTION(Client, Reliable)
	void ShowPropOutline();

	UFUNCTION(Client, Reliable)
	void HidePropOutline();

When this runs I get both characters in the scene printing their name to the screen even when only one of them is looking at an object that can be interacted with.

[Voidoz]

Hi all,

Was able to get it working by checking if the tick function was being run on the character’s client. Here’s how I did it:

CPP

void AHiderCharacter::Tick(float DeltaTime)
{
	UWorld* World = GetWorld();
	bool bIsDedicatedServer = UKismetSystemLibrary::IsDedicatedServer(World);

	if (!bIsDedicatedServer && GetController() == UGameplayStatics::GetPlayerController(World, 0))
	{
		HidePropOutline();
		LastProp = nullptr;

		FHitResult HitResult;
		bool bDidHit = GetPropInView(HitResult);
		if (bDidHit)
		{
			UStaticMeshComponent* Component = Cast<UStaticMeshComponent>(HitResult.GetComponent());
			LastProp = Component;
			ShowPropOutline();
		}
	}
}

bool AHiderCharacter::GetPropInView(FHitResult& OutHitResult) const
{
	FVector Start = CameraBoomComponent->GetComponentLocation();
	FVector End = Start + (DetectPropDistance * CameraBoomComponent->GetForwardVector());
	FCollisionShape Sphere = FCollisionShape::MakeSphere(DetectPropRadius);

	return GetWorld()->SweepSingleByChannel(
		OutHitResult,
		Start, End,
		FQuat::Identity,
		ECollisionChannel::ECC_GameTraceChannel2,
		Sphere
	);
}

void AHiderCharacter::ShowPropOutline()
{
	FString Name = GetActorNameOrLabel();
	if (IsValid(LastProp))
	{
		LastProp->SetCustomDepthStencilValue(1);
		LastProp->SetRenderCustomDepth(true);
	}
}

void AHiderCharacter::HidePropOutline()
{
	if (IsValid(LastProp))
	{
		LastProp->SetRenderCustomDepth(false);
	}
}

H

// ...

	UPROPERTY(VisibleAnywhere)
	UCameraComponent* CameraComponent;

// ...

private:
	UPROPERTY(EditAnywhere)
	float DetectPropDistance = 300;

	UPROPERTY(EditAnywhere)
	float DetectPropRadius = 20;

	UStaticMeshComponent* LastProp;

	bool GetPropInView(FHitResult& OutHitResult) const;

	void ShowPropOutline();

	void HidePropOutline();