Finished implementing item drops

Signed-off-by: TjgL <lithmoneo@gmail.com>

Config/DefaultEngine.ini

@@ -131,7 +131,7 @@ ManualIPAddress=
 +Profiles=(Name="Ragdoll",CollisionEnabled=QueryAndPhysics,bCanModify=False,ObjectTypeName="PhysicsBody",CustomResponses=((Channel="Pawn",Response=ECR_Ignore),(Channel="Visibility",Response=ECR_Ignore),(Channel="Bullet",Response=ECR_Ignore)),HelpMessage="Simulating Skeletal Mesh Component. All other channels will be set to default.")
 +Profiles=(Name="Vehicle",CollisionEnabled=QueryAndPhysics,bCanModify=False,ObjectTypeName="Vehicle",CustomResponses=,HelpMessage="Vehicle object that blocks Vehicle, WorldStatic, and WorldDynamic. All other channels will be set to default.")
 +Profiles=(Name="UI",CollisionEnabled=QueryOnly,bCanModify=False,ObjectTypeName="WorldDynamic",CustomResponses=((Channel="WorldStatic",Response=ECR_Overlap),(Channel="WorldDynamic",Response=ECR_Overlap),(Channel="Pawn",Response=ECR_Overlap),(Channel="Camera",Response=ECR_Overlap),(Channel="PhysicsBody",Response=ECR_Overlap),(Channel="Vehicle",Response=ECR_Overlap),(Channel="Destructible",Response=ECR_Overlap),(Channel="Bullet",Response=ECR_Ignore)),HelpMessage="WorldStatic object that overlaps all actors by default. All new custom channels will use its own default response. ")
-+Profiles=(Name="Drop",CollisionEnabled=QueryAndPhysics,bCanModify=True,ObjectTypeName="Drop",CustomResponses=,HelpMessage="Needs description")
++Profiles=(Name="Drop",CollisionEnabled=QueryAndPhysics,bCanModify=True,ObjectTypeName="Drop",CustomResponses=((Channel="WorldStatic",Response=ECR_Ignore),(Channel="Pawn",Response=ECR_Ignore),(Channel="Visibility",Response=ECR_Ignore),(Channel="Camera",Response=ECR_Ignore),(Channel="PhysicsBody",Response=ECR_Ignore),(Channel="Vehicle",Response=ECR_Ignore),(Channel="Destructible",Response=ECR_Ignore),(Channel="Bullet",Response=ECR_Ignore),(Channel="Enemy",Response=ECR_Ignore),(Channel="Drop",Response=ECR_Ignore)),HelpMessage="Needs description")
 +DefaultChannelResponses=(Channel=ECC_GameTraceChannel1,DefaultResponse=ECR_Block,bTraceType=True,bStaticObject=False,Name="Bullet")
 +DefaultChannelResponses=(Channel=ECC_GameTraceChannel2,DefaultResponse=ECR_Block,bTraceType=True,bStaticObject=False,Name="Enemy")
 +DefaultChannelResponses=(Channel=ECC_GameTraceChannel3,DefaultResponse=ECR_Ignore,bTraceType=False,bStaticObject=False,Name="Projectile")

Source/LegumeMix/Private/Ammo/LMAmmoPack.cpp

@@ -16,7 +16,7 @@ void ALMAmmoPack::ConsumePack(ALMPlayer* Player)
 {
 	Super::ConsumePack(Player);
 
-	Player->GetWeaponManager()->AddAmmoType(AmmoType, AmmoCount);
+	Player->AddAmmo(AmmoType, AmmoCount);
 	OnPackConsumed();
 	Despawn();
 }

Source/LegumeMix/Private/LMHealthPack.cpp

@@ -14,6 +14,8 @@ ALMHealthPack::ALMHealthPack()
 
 void ALMHealthPack::ConsumePack(ALMPlayer* Player)
 {
+	Super::ConsumePack(Player);
+	
 	Player->GetHealthComponent()->AddHealth(HealthGain);
 	OnPackConsumed();
 	Despawn();

Source/LegumeMix/Private/LMItemDrop.cpp

@@ -3,12 +3,17 @@
 
 #include "LMItemDrop.h"
 
+#include "Kismet/KismetMathLibrary.h"
+
 
 ALMItemDrop::ALMItemDrop()
 {
 	PrimaryActorTick.bCanEverTick = true;
+	Root = CreateDefaultSubobject<USceneComponent>("Root");
+	RootComponent = Root;
+	
 	StaticMeshComponent = CreateDefaultSubobject<UStaticMeshComponent>("MeshComponent");
-	RootComponent = StaticMeshComponent;
+	StaticMeshComponent->SetupAttachment(RootComponent);
 }
 
 void ALMItemDrop::BeginPlay()
@@ -18,8 +23,41 @@ void ALMItemDrop::BeginPlay()
 	GetWorldTimerManager().SetTimer(DespawnHandle, this, &ALMItemDrop::Despawn, TimeBeforeDespawn);
 }
 
+void ALMItemDrop::SetAttractor(AActor* Target)
+{
+	Attractor = Target;
+	GetWorldTimerManager().SetTimer(MoveHandle, this, &ALMItemDrop::DoMovingTowardsTarget, MoveRate, true);
+	GetWorldTimerManager().ClearTimer(DespawnHandle);
+}
+
+void ALMItemDrop::DoMovingTowardsTarget()
+{
+	if (MoveTime >= MoveDuration)
+	{
+		GetWorldTimerManager().ClearTimer(MoveHandle);
+		SetActorLocation(Attractor->GetActorLocation());
+		return;
+	}
+	
+	const FVector Position = Attractor->GetActorLocation();
+
+	const float Duration = MoveTime / MoveDuration;
+	
+	FString text = FString::Printf(TEXT("Time : %f / %f = %f"), MoveTime, MoveDuration, Duration);
+	GEngine->AddOnScreenDebugMessage(-15, 1.f, FColor::Red, text);
+	const float CurvePosition = PositionAtTime->GetFloatValue(Duration); 
+	const FVector NewPosition = UKismetMathLibrary::VLerp(SpawnLocation, Position, CurvePosition);
+
+	MoveTime += MoveRate;
+	SetActorLocation(NewPosition);
+}
+
 void ALMItemDrop::ConsumePack(ALMPlayer* Player)
 {
+	if (MoveHandle.IsValid())
+	{
+		GetWorldTimerManager().ClearTimer(MoveHandle);
+	}
 }
 
 void ALMItemDrop::Despawn()

Source/LegumeMix/Private/Player/LMGrabRange.cpp

@@ -17,19 +17,32 @@ void ULMGrabRange::TickComponent(float DeltaTime, enum ELevelTick TickType, FAct
 {
 	Super::TickComponent(DeltaTime, TickType, ThisTickFunction);
 
+	if (!bIsEnabled)
+		return;
 
+	for (int i = Drops.Num() - 1; i >= 0; i--)
+	{
+		ALMItemDrop* Item = Drops[i];
+		
+		const FVector ItemPosition = Item->GetActorLocation();
+		const FVector Position = GetComponentLocation();
+
+		const float DistanceLeft = FVector::Dist(ItemPosition, Position);
+		FString text = FString::Printf(TEXT("Item %s at distance %f"), *Item->GetName(), DistanceLeft);
+		GEngine->AddOnScreenDebugMessage(i, 1.f, FColor::Cyan, text);
+		
+		if (DistanceLeft <= RangeToGrab)
+		{
+			Item->ConsumePack(Player);
+			Drops.Remove(Item);
+		}
+	}
 }
 
-void ULMGrabRange::OnDropOverlapped_Implementation(ALMItemDrop* ItemDrop)
+void ULMGrabRange::OnDropOverlapped(ALMItemDrop* ItemDrop)
 {
 	Drops.AddUnique(ItemDrop);
-}
-
-
-void ULMGrabRange::ConsumeDrop(ALMItemDrop* ItemDrop)
-{
-	ItemDrop->ConsumePack(Player);
-	
+	ItemDrop->SetAttractor(Player);
 }
 
 void ULMGrabRange::BeginPlay()

Source/LegumeMix/Private/Player/LMGrabRange.h

@@ -26,21 +26,14 @@ private:
 	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix, meta=(AllowPrivateAccess=true, ClampMin=0.1f))
 	float RangeToGrab = 10.f;
 
-	/** Distance curve from 0-1 to the player. */
-	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix, meta=(AllowPrivateAccess=true))
-	TObjectPtr<UCurveFloat> SpeedAtPosition;
-
 	TObjectPtr<ALMPlayer> Player;
 
 public:
 	ULMGrabRange();
-	UFUNCTION(BlueprintCallable, BlueprintNativeEvent, Category=Legumix)
+	UFUNCTION(BlueprintCallable, Category=Legumix)
 	void OnDropOverlapped(ALMItemDrop* ItemDrop);
 
-	UFUNCTION(BlueprintCallable, Category=Legumix)
-	void ConsumeDrop(ALMItemDrop* ItemDrop);
-
-	void TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
+	virtual void TickComponent(float DeltaTime, enum ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;
 
 protected:
 	virtual void BeginPlay() override;

Source/LegumeMix/Private/Player/LMPlayer.cpp

@@ -116,6 +116,14 @@ bool ALMPlayer::CanJumpInternal_Implementation() const
 	return JumpIsAllowedInternal();
 }
 
+void ALMPlayer::AddAmmo(const EAmmoType Ammo, const int AmmoCount)
+{
+	if (GetWeaponManager()->AddAmmoType(Ammo, AmmoCount))
+	{
+		OnAmmoPickup();
+	}
+}
+
 void ALMPlayer::SetWeaponManager(ULMWeaponManager* Manager)
 {
 	UE_LOG(LogTemp, Warning, TEXT("Set weapon manager"))

Source/LegumeMix/Public/LMItemDrop.h

@@ -18,26 +18,48 @@ protected:
 	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix)
 	float TimeBeforeDespawn = 30.f;
 	
+	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix)
+	float MoveRate = 0.1f;
+	
+	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix)
+	float MoveDuration = 1.f;
+
+	/** Distance curve from 0-1 to the player. */
+	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix, meta=(AllowPrivateAccess=true))
+	TObjectPtr<UCurveFloat> PositionAtTime;
+
 	FTimerHandle DespawnHandle;
+	FTimerHandle MoveHandle;
 
 private:
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta = (AllowPrivateAccess = true))
+	TObjectPtr<USceneComponent> Root;
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta = (AllowPrivateAccess = true))
 	TObjectPtr<UStaticMeshComponent> StaticMeshComponent;
 
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta = (AllowPrivateAccess = true))
 	FVector SpawnLocation;
 
+	UPROPERTY()
+	TObjectPtr<AActor> Attractor;
+
+	float MoveTime = 0.f;
+
 public:
 	ALMItemDrop();
 	virtual void BeginPlay() override;
 
+	void SetAttractor(AActor* Target);
+	UFUNCTION()
+	void DoMovingTowardsTarget();
+	
 	UFUNCTION(BlueprintCallable)
 	virtual void ConsumePack(ALMPlayer* Player);
 
 	UFUNCTION(BlueprintImplementableEvent)
 	void OnPackConsumed();
 
-	FVector GetSpawnLocation() { return SpawnLocation; }
+	FVector GetSpawnLocation() const { return SpawnLocation; }
 
 protected:
 	UFUNCTION(BlueprintCallable)

Source/LegumeMix/Public/Player/LMPlayer.h

@@ -5,6 +5,7 @@
 #include "CoreMinimal.h"
 #include "LMBulletInfo.h"
 #include "LMTeam.h"
+#include "Ammo/LMAmmoPack.h"
 #include "Camera/CameraComponent.h"
 #include "GameFramework/Character.h"
 #include "LMPlayer.generated.h"
@@ -56,6 +57,9 @@ public:
 
 	virtual bool CanJumpInternal_Implementation() const override;
 
+	UFUNCTION(BlueprintCallable)
+	void AddAmmo(EAmmoType Ammo, int AmmoCount);
+
 protected:
 	// Called when the game starts or when spawned
 	virtual void BeginPlay() override;