44 - Variable Replication

Source/Blaster/Character/BlasterCharacter.cpp

@@ -3,10 +3,12 @@
 
 #include "BlasterCharacter.h"
 
+#include "Blaster/Weapon/Weapon.h"
 #include "Camera/CameraComponent.h"
 #include "Components/WidgetComponent.h"
 #include "GameFramework/CharacterMovementComponent.h"
 #include "GameFramework/SpringArmComponent.h"
+#include "Net/UnrealNetwork.h"
 
 
 ABlasterCharacter::ABlasterCharacter()
@@ -29,16 +31,21 @@ ABlasterCharacter::ABlasterCharacter()
 	OverheadWidget->SetupAttachment(RootComponent);
 }
 
+void ABlasterCharacter::GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const
+{
+	Super::GetLifetimeReplicatedProps(OutLifetimeProps);
+
+	DOREPLIFETIME_CONDITION(ABlasterCharacter, OverlappingWeapon, COND_OwnerOnly);
+}
+
 void ABlasterCharacter::BeginPlay()
 {
 	Super::BeginPlay();
-	
 }
 
 void ABlasterCharacter::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
-
 }
 
 void ABlasterCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
@@ -83,3 +90,32 @@ void ABlasterCharacter::LookUp(float Value)
 {
 	AddControllerPitchInput(Value);
 }
+
+void ABlasterCharacter::SetOverlappingWeapon(AWeapon* Weapon)
+{
+	if (OverlappingWeapon)
+	{
+		OverlappingWeapon->ShowPickupWidget(false);
+	}
+	
+	OverlappingWeapon = Weapon;
+	if (IsLocallyControlled())
+	{
+		if (OverlappingWeapon)
+		{
+			OverlappingWeapon->ShowPickupWidget(true);
+		}
+	}
+}
+
+void ABlasterCharacter::OnRep_OverlappingWeapon(AWeapon* LastWeapon)
+{
+	if (OverlappingWeapon)
+	{
+		OverlappingWeapon->ShowPickupWidget(true);
+	}
+	if (LastWeapon)
+	{
+		LastWeapon->ShowPickupWidget(false);
+	}
+}

Source/Blaster/Character/BlasterCharacter.h

@@ -15,7 +15,7 @@ public:
 	ABlasterCharacter();
 	virtual void Tick(float DeltaTime) override;
 	virtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;
-	
+	virtual void GetLifetimeReplicatedProps(TArray<FLifetimeProperty>& OutLifetimeProps) const override;
 protected:
 	virtual void BeginPlay() override;
 
@@ -33,6 +33,13 @@ private:
 
 	UPROPERTY(EditAnywhere, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))
 	class UWidgetComponent* OverheadWidget;
-public:
+
+	UPROPERTY(ReplicatedUsing = OnRep_OverlappingWeapon)
+	class AWeapon* OverlappingWeapon;
+
+	UFUNCTION()
+	void OnRep_OverlappingWeapon(AWeapon* LastWeapon);
 	
+public:
+	void SetOverlappingWeapon(AWeapon* Weapon);
 };

Source/Blaster/Weapon/Weapon.cpp

@@ -39,6 +39,7 @@ void AWeapon::BeginPlay()
 		AreaSphere->SetCollisionEnabled(ECollisionEnabled::QueryAndPhysics);
 		AreaSphere->SetCollisionResponseToChannel(ECollisionChannel::ECC_Pawn, ECollisionResponse::ECR_Overlap);
 		AreaSphere->OnComponentBeginOverlap.AddDynamic(this, &AWeapon::OnSphereOverlap);
+		AreaSphere->OnComponentEndOverlap.AddDynamic(this, &AWeapon::OnSphereEndOverlap);
 	}
 
 	if (PickupWidget)
@@ -55,8 +56,26 @@ void AWeapon::OnSphereOverlap(UPrimitiveComponent* OverlappedComponent,
                               const FHitResult& SweepResult)
 {
 	ABlasterCharacter* BlasterCharacter = Cast<ABlasterCharacter>(OtherActor);
-	if (BlasterCharacter && PickupWidget)
+	if (BlasterCharacter)
 	{
-		PickupWidget->SetVisibility(true);
+		BlasterCharacter->SetOverlappingWeapon(this);
+	}
+}
+
+void AWeapon::OnSphereEndOverlap(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor,
+	UPrimitiveComponent* OtherComp, int32 OtherBodyIndex)
+{
+	ABlasterCharacter* BlasterCharacter = Cast<ABlasterCharacter>(OtherActor);
+	if (BlasterCharacter)
+	{
+		BlasterCharacter->SetOverlappingWeapon(nullptr);
+	}
+}
+
+void AWeapon::ShowPickupWidget(bool bShowWidget)
+{
+	if (PickupWidget)
+	{
+		PickupWidget->SetVisibility(bShowWidget);
 	}
 }

Source/Blaster/Weapon/Weapon.h

@@ -22,7 +22,8 @@ class BLASTER_API AWeapon : public AActor
 
 public:
 	AWeapon();
-
+	void ShowPickupWidget(bool bShowWidget);
+	
 protected:
 	virtual void BeginPlay() override;
 
@@ -35,6 +36,14 @@ protected:
 		bool bFromSweep,
 		const FHitResult& SweepResult
 	);
+	
+	UFUNCTION()
+	virtual void OnSphereEndOverlap(
+		UPrimitiveComponent* OverlappedComponent,
+		AActor* OtherActor,
+		UPrimitiveComponent* OtherComp,
+		int32 OtherBodyIndex
+	);
 
 private:
 	UPROPERTY(VisibleAnywhere, Category="Weapon Properties")