1 UCLASS()
 2 class SNVRCLAYSHOOTING_API AProjectile : public AActor
 3 {
 4     GENERATED_BODY()
 5
 6 public:
 7     // Sets default values for this actor's properties
 8     AProjectile();
 9
10     UPROPERTY(VisibleAnywhere, BlueprintReadWrite, Category = "Projectile")
11         UStaticMeshComponent* ProjectileMesh;
12
13     UPROPERTY(VisibleAnywhere, BlueprintReadWrite, Category = "Projectile")
14         UParticleSystemComponent* LaunchParticle;    //烟火，开枪时
15
16     UPROPERTY(VisibleAnywhere, BlueprintReadWrite, Category = "Projectile")
17         UProjectileMovementComponent *ProjectileMovementComponent = nullptr;
18
19 protected:
20     // Called when the game starts or when spawned
21     virtual void BeginPlay() override;
22
23     UFUNCTION()
24         void OnHit(UPrimitiveComponent* HitComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit);
25
26 public:
27     // Called every frame
28     virtual void Tick(float DeltaTime) override;
29
30     UFUNCTION(BlueprintCallable, Category = "Projectile_Fun")
31         void LaunchProjectile(FVector Speed);
32
33 };

 1 AProjectile::AProjectile()
 2 {
 3      // Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.
 4     PrimaryActorTick.bCanEverTick = true;
 5
 6     ProjectileMovementComponent = CreateDefaultSubobject<UProjectileMovementComponent>(FName("ProjectileMovement"));    //生成组件
 7     ProjectileMovementComponent->bAutoActivate = false;        //自动飞行调成false
 8
 9     ProjectileMesh = CreateDefaultSubobject<UStaticMeshComponent>(FName("ProjectileMesh"));
10     RootComponent = ProjectileMesh;
11     ProjectileMesh->SetNotifyRigidBodyCollision(true);
12     ProjectileMesh->SetVisibility(true);
13
14     LaunchParticle = CreateDefaultSubobject<UParticleSystemComponent>(FName("LaunchParticle"));
15     LaunchParticle->SetupAttachment(ProjectileMesh);    //将粒子效果绑定在根结点上（即ProjectileMesh）
16     LaunchParticle->SetAutoActivate(true);                //创建好就启动
17
18     ProjectileMesh->OnComponentHit.AddDynamic(this, &AProjectile::OnHit);
19
20     InitialLifeSpan = 5.0f;
21 }
22
23 // Called when the game starts or when spawned
24 void AProjectile::BeginPlay()
25 {
26     Super::BeginPlay();
27
28 }
29
30 // Called every frame
31 void AProjectile::Tick(float DeltaTime)
32 {
33     Super::Tick(DeltaTime);
34
35 }
36 void AProjectile::LaunchProjectile(FVector Speed)
37 {
38     ProjectileMovementComponent->SetVelocityInLocalSpace(Speed);
39     ProjectileMovementComponent->Activate();    //可以飞行了
40 }
41 //碰撞后发生的事件
42 void AProjectile::OnHit(UPrimitiveComponent* HitComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, FVector NormalImpulse, const FHitResult& Hit)
43 {
44     UE_LOG(LogTemp, Warning, TEXT("AProjectile::OnHit--OtherActor.Name=%s"),*OtherActor->GetName());    //撞击后给个提示
45
46     ProjectileMesh->SetNotifyRigidBodyCollision(false);    //碰撞之后再也不发生碰撞事件
47     //CollisionMesh->DestroyComponent();    //不是DestroyActor，Component是单一一个
48
49     //受伤害源OtherActor的TakeDamage()会被调用
50     UGameplayStatics::ApplyPointDamage(OtherActor, 10.0f, GetActorLocation(), Hit,NULL,NULL, UDamageType::StaticClass());
51
52     Destroy();
53 }

 1 float ADamagedActor::TakeDamage(float DamageAmount, struct FDamageEvent const& DamageEvent, class AController* EventInstigator, AActor* DamageCauser)
 2 {
 3     float actuallyApplied = 0.0f;
 4
 5     MaxHP -= DamageAmount;
 6
 7     UE_LOG(LogTemp,Warning,TEXT("ADamagedActor::TakeDamage--MaxHP=%f"),MaxHP);
 8
 9     actuallyApplied = FMath::Clamp<float>(MaxHP, 0.0f, 100.0f);
10
11     return actuallyApplied;
12 }