（第三周）文章三

生成函数

生成函数有很多重置这里只提一种

GetWorld()->SpawnActor<T>(UClass, FTransform);

子弹类生成

	PlayerInputComponent->BindAction(TEXT("Fire"), IE_Pressed, this, &ADrone::DoFire);

void ADrone::DoFire()
{
	FTransform fireTrans = Mesh->GetSocketTransform(TEXT("Fire"));
	GetWorld()->SpawnActor<AMissle>(Bullet, fireTrans);
}

敌人类生成

设置生成区域

	SpawnArea = CreateDefaultSubobject<UBoxComponent>(TEXT("SpawnArea"));
	RootComponent = SpawnArea;
	SpawnArea->SetBoxExtent(FVector(1000.0f,1000.0f,100.0f));

生成

void AEnemySpawner::SpawnEnemy()
{
	FVector origin;
	FVector extents;
	GetActorBounds(false, origin, extents);
	FVector spawnPoint =  UKismetMathLibrary::RandomPointInBoundingBox(origin,extents);
	GetWorld()->SpawnActor<AEnemy>(EnemyType, spawnPoint,FRotator::ZeroRotator);
}

设置开始生成

void AEnemySpawner::BeginPlay()
{
	Super::BeginPlay();
	GetWorld()->GetTimerManager().SetTimer(SpawnHandle, this,&AEnemySpawner::SpawnEnemy,spawnSpan,true);
	
}

h：

#include "GameFramework/Actor.h"
#include "Engine/EngineTypes.h"
#include <LearningProject/Enemy.h>

	UPROPERTY(VisibleAnywhere)
		class UBoxComponent* SpawnArea;
	UPROPERTY(EditAnywhere)
		TSubclassOf<AEnemy> EnemyType;

	UPROPERTY(EditAnywhere)
		float spawnSpan = 1.0f;

private:
	FTimerHandle SpawnHandle;

子弹攻击敌人判定

void AMissle::OverlapHandle(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
	if (OtherActor->IsA<AEnemy>()) {
		OtherActor->Destroy();
		this->Destroy();
	}
}

h:

	UFUNCTION()
		void OverlapHandle(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);