So I’m following along with the Udemy Unreal Engine C++ Developer course, and working through the SimpleShooter part of the course, I wanted to make the gun I’ve built fire actual projectiles. I reused a lot of the code from the ToonTanks sections, and my projectiles do spawn on fire event, but two weird things happen
1.) They don’t move, and
2.) They spawn sideways.
The particle trails do spawn at the moment of firing, and that’s neat, but then they hang suspended in the air where the spawn location is. I’m pretty confident I can sort out of the rotation part, but why aren’t they moving?
Projectile header:
#pragma once
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "ProjectileBase.generated.h"
class UProjectileMovementComponent;
UCLASS()
class SIMPLESHOOTER_API AProjectileBase : public AActor
{
GENERATED_BODY()
public:
// Sets default values for this actor's properties
AProjectileBase();
private:
// COMPONENTS
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components", meta = (AllowPrivateAccess = "true"))
UProjectileMovementComponent* ProjectileMovement;
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components", meta = (AllowPrivateAccess = "true"))
UStaticMeshComponent* ProjectileMesh;
UPROPERTY(EditDefaultsOnly, Category = "Components")
TSubclassOf<UDamageType> DamageType;
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Components", meta = (AllowPrivateAccess = "true"))
UParticleSystemComponent* ParticleTrail;
// VARIABLES
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Movement", meta = (AllowPrivateAccess = "true"))
float MovementSpeed = 3000.f;
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Damage", meta = (AllowPrivateAccess = "true"))
float Damage = 50.f;
protected:
// Called when the game starts or when spawned
virtual void BeginPlay() override;
};
Projectile code:
#include “ProjectileBase.h”
#include “Components/StaticMeshComponent.h”
#include “GameFramework/ProjectileMovementComponent.h”
#include “Kismet/GameplayStatics.h”
#include “particles/ParticleSystemComponent.h”
// Sets default values
AProjectileBase::AProjectileBase()
{
// Set this actor to call Tick() every frame. You can turn this off to improve performance if you don't need it.
PrimaryActorTick.bCanEverTick = false;
ProjectileMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("Projectile Mesh"));
RootComponent = ProjectileMesh;
ProjectileMovement = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("Projectile Movement"));
ParticleTrail = CreateDefaultSubobject<UParticleSystemComponent>(TEXT("Particle Trail"));
ParticleTrail->SetupAttachment(RootComponent);
}
// Called when the game starts or when spawned
void AProjectileBase::BeginPlay()
{
Super::BeginPlay();
ProjectileMovement->InitialSpeed = MovementSpeed;
ProjectileMovement->MaxSpeed = MovementSpeed;
InitialLifeSpan = 5.f;
}
How they spawn:
Projectile Movement and Mesh details:
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