Added basic bullet trails

Source/LegumeMix/LegumeMix.Build.cs

@@ -8,7 +8,7 @@ public class LegumeMix : ModuleRules
 	{
 		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
 	
-		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "EnhancedInput" });
+		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore", "EnhancedInput", "Niagara" });
 
 		PrivateDependencyModuleNames.AddRange(new string[] {  });
 

Source/LegumeMix/Private/Player/LMPlayer.cpp

@@ -82,7 +82,10 @@ void ALMPlayer::FireBullets(const FLMBulletInfo Settings)
 
 	OnFire();
 
+#if WITH_EDITOR
+	if (bDrawBulletDebug)
 		DrawDebugLine(GetWorld(), Settings.Origin, Settings.Origin + (Settings.Direction * Settings.MaxDistance), FColor::Blue, false, 2.f);
+#endif
 
 	for (int Shots = 0; Shots < Settings.BulletCount; Shots++)
 	{
@@ -90,18 +93,19 @@ void ALMPlayer::FireBullets(const FLMBulletInfo Settings)
 		EndLocation = Settings.Origin + (ShotVector * Settings.MaxDistance);
 
 		const bool HasHit = GetWorld()->LineTraceSingleByChannel(OutHit, Settings.Origin, EndLocation, TRACE_BULLET);
+
+#if WITH_EDITOR
+		if (bDrawBulletDebug)
 			DrawDebugLineTraceSingle(GetWorld(), Settings.Origin, EndLocation, EDrawDebugTrace::ForDuration, HasHit, OutHit, FColor::Green, FColor::Red, 2.f);
+#endif
+		
+		WeaponManager->CreateTracer(Settings.AmmoType, HasHit ? OutHit.Location : EndLocation, ShotVector.Rotation());
 		
 		if (!HasHit)
 			continue;
 		
-		FString Hit = FString::Printf(TEXT("Hit %s"), *OutHit.Component->GetName());
-		// GEngine->AddOnScreenDebugMessage(INDEX_NONE, 2.f, FColor::Red, Hit);
-		UE_LOG(LogTemp, Display, TEXT("%s"), *Hit);
-		
 		if (ULMHitBox* HitBox = Cast<ULMHitBox>(OutHit.Component))
 		{
-			UE_LOG(LogTemp, Warning, TEXT("Hit Hitbox"));
 			HitSomething = true;
 			HitBox->OnHit(Settings);
 		}

Source/LegumeMix/Private/Weapon/LMBulletTracer.cpp

@@ -0,0 +1,48 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+
+#include "Weapon/LMBulletTracer.h"
+#include "NiagaraComponent.h"
+
+
+ALMBulletTracer::ALMBulletTracer()
+{
+	PrimaryActorTick.bCanEverTick = true;
+
+	TrailFx = CreateDefaultSubobject<UNiagaraComponent>(TEXT("Tracer FX"));
+	RootComponent = TrailFx;
+}
+
+void ALMBulletTracer::BeginPlay()
+{
+	Super::BeginPlay();
+	TrailFx->SetVariableFloat("Lifetime", TrailLifeTime);
+}
+
+void ALMBulletTracer::Tick(float DeltaTime)
+{
+	Super::Tick(DeltaTime);
+}
+
+void ALMBulletTracer::Initialize(const FVector& Vector)
+{
+	const double Distance = FVector::Distance(Vector, GetActorLocation());
+	float const LifeTime = Distance / Speed;
+
+	OnIntialized(LifeTime);
+}
+
+void ALMBulletTracer::DestinationReached()
+{
+	GetWorldTimerManager().ClearTimer(TimerHandle);
+	TrailFx->Deactivate();
+
+	OnDestinationReached();
+	
+	GetWorldTimerManager().SetTimer(TimerHandle, [this]
+	{
+		GetWorldTimerManager().ClearTimer(TimerHandle);
+		Destroy();
+	}, TrailLifeTime, false);
+}
+

Source/LegumeMix/Private/Weapon/LMWeaponBase.cpp

@@ -20,6 +20,9 @@ ALMWeaponBase::ALMWeaponBase()
 	WeaponMesh->SetupAttachment(RootComponent);
 
 	WeaponSocket = FName();
+
+	TracerOrigin = CreateDefaultSubobject<USceneComponent>(TEXT("Tracer Origin"));
+	TracerOrigin->SetupAttachment(RootComponent);
 }
 
 void ALMWeaponBase::BeginPlay()

Source/LegumeMix/Private/Weapon/LMWeaponManager.cpp

@@ -19,13 +19,15 @@ void ULMWeaponManager::BeginPlay()
 		SetupAmmoData();
 }
 
-// void ULMWeaponManager::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
-// {
-// 	Super::PostEditChangeProperty(PropertyChangedEvent);
-// 	
-// 	if (AmmoDataTable)
-// 		SetupAmmoData();
-// }
+#if WITH_EDITOR
+void ULMWeaponManager::PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent)
+{
+	Super::PostEditChangeProperty(PropertyChangedEvent);
+	
+	if (AmmoDataTable)
+		SetupAmmoData();
+}
+#endif
 
 void ULMWeaponManager::SetupAmmoData()
 {
@@ -66,6 +68,22 @@ int ULMWeaponManager::RemoveAmmo(const EAmmoType Ammo, const int Count)
 	return 0;
 }
 
+void ULMWeaponManager::CreateTracer(const EAmmoType Ammo, const FVector EndLocation, const FRotator Direction)
+{
+	if (AmmoData.Contains(Ammo))
+	{
+		const FLMAmmoData &Data = AmmoData[Ammo];
+		if (!Data.BulletTracer)
+			return;
+		
+		if (ALMBulletTracer* Trace = GetWorld()->SpawnActor<ALMBulletTracer>(Data.BulletTracer))
+		{
+			Trace->SetActorLocationAndRotation(GetCurrentWeapon()->GetTracerOrigin(), Direction);
+			Trace->Initialize(EndLocation);
+		}
+	}
+}
+
 void ULMWeaponManager::Initialize(USkeletalMeshComponent* Mesh)
 {
 	ArmsMesh = Mesh;

Source/LegumeMix/Public/Ammo/LMAmmoData.h

@@ -2,6 +2,7 @@
 
 #include "LMAmmoType.h"
 #include "Kismet/KismetMathLibrary.h"
+#include "Weapon/LMBulletTracer.h"
 #include "LMAmmoData.generated.h"
 
 
@@ -19,6 +20,9 @@ struct FLMAmmoData : public FTableRowBase
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta=(ClampMin=0, Uimin=0))
 	int AmmoCount = 8;
 
+	UPROPERTY(EditAnywhere, BlueprintReadWrite)
+	TSubclassOf<ALMBulletTracer> BulletTracer;
+
 	/**
 	 * An utility method to add and
 	 * @param Quantity The quantity of ammo to add.

Source/LegumeMix/Public/Player/LMPlayer.h

@@ -83,7 +83,6 @@ public:
 	UFUNCTION(BlueprintImplementableEvent, Category=Legumix)
 	void OnReload();
 
-
 private:
 	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category=Legumix, meta = (AllowPrivateAccess = true))
 	TObjectPtr<ULMWeaponManager> WeaponManager;
@@ -94,6 +93,13 @@ private:
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta = (AllowPrivateAccess = true))
 	TObjectPtr<UCameraComponent> Camera;
 
+private:
+#if WITH_EDITORONLY_DATA
+	/** If set, bullet debug will be drawn. */
+	UPROPERTY(EditAnywhere, Category=Legumix, meta = (AllowPrivateAccess = true))
+	bool bDrawBulletDebug = false;
+#endif
+
 private:
 	FRandomStream SpreadStream;
 };

Source/LegumeMix/Public/Weapon/LMBulletTracer.h

@@ -0,0 +1,54 @@
+// Fill out your copyright notice in the Description page of Project Settings.
+
+#pragma once
+
+#include "CoreMinimal.h"
+#include "GameFramework/Actor.h"
+#include "LMBulletTracer.generated.h"
+
+class UNiagaraComponent;
+
+UCLASS(Blueprintable)
+class LEGUMEMIX_API ALMBulletTracer : public AActor
+{
+	GENERATED_BODY()
+
+public:
+	ALMBulletTracer();
+	void BeginPlay() override;
+	virtual void Tick(float DeltaTime) override;
+
+	void Initialize(const FVector& Vector);
+public:
+	UFUNCTION(BlueprintCallable, Category=Legumix)
+	void DestinationReached();
+	
+	/** Called automatically when the bullet reaches it's destination: it hit something.
+	 * The Actor is then automatically destroyed after *TrailLifetime* seconds.
+	 */
+	UFUNCTION(BlueprintImplementableEvent)
+	void OnDestinationReached();
+
+	/** Called automatically when the bullet has been given a direction.
+	 * @param Lifetime The number of seconds before this object reaches it's destination.
+	 */
+	UFUNCTION(BlueprintCallable, BlueprintImplementableEvent, Category=Legumix)
+	void OnIntialized(float Lifetime);
+
+private:
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Legumix, meta=(AllowPrivateAccess=true))
+	float Speed = 10000.f;
+
+	/** The lifetime of a single particle emitted by the niagara system. */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Legumix, meta=(AllowPrivateAccess=true))
+	float TrailLifeTime = 2.f;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadWrite, Category=Legumix, meta=(AllowPrivateAccess=true))
+	TObjectPtr<UNiagaraComponent> TrailFx;
+
+	UPROPERTY(BlueprintReadWrite, Category=Legumix, meta=(AllowPrivateAccess=true))
+	bool bCanMove;
+	
+private:
+	FTimerHandle TimerHandle;
+};

Source/LegumeMix/Public/Weapon/LMWeaponBase.h

@@ -47,6 +47,9 @@ public:
 	UFUNCTION(BlueprintCallable, BlueprintImplementableEvent)
 	void OnDefaultReload();
 	
+	UFUNCTION(BlueprintCallable)
+	FVector GetTracerOrigin() const { return TracerOrigin->GetComponentLocation(); }
+
 protected:
 	UFUNCTION(BlueprintCallable)
 	void AllowRefire();
@@ -131,5 +134,8 @@ private: /* Components */
 
 	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta=(AllowPrivateAccess=true))
 	TObjectPtr<USkeletalMeshComponent> WeaponMesh;
+
+	UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category=Legumix, meta=(AllowPrivateAccess=true))
+	TObjectPtr<USceneComponent> TracerOrigin;
 };
 

Source/LegumeMix/Public/Weapon/LMWeaponManager.h

@@ -53,6 +53,9 @@ public:
 	UFUNCTION(BlueprintCallable, Category="Legumix|Ammo")
 	int RemoveAmmo(EAmmoType Ammo, int Count);
 
+	UFUNCTION(BlueprintCallable)
+	void CreateTracer(EAmmoType Ammo, FVector EndLocation, FRotator Direction);
+
 public:
 	UPROPERTY(BlueprintAssignable, BlueprintCallable, Category=Legumix)
 	FOnWeaponFiredSignature WeaponFired;
@@ -61,7 +64,10 @@ public:
 
 protected:
 	virtual void BeginPlay() override;
-	// virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
+	
+#if WITH_EDITOR
+	virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
+#endif
 
 private:
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category=Legumix, meta = (AllowPrivateAccess = "true"))