生成用来创建电池的volume
添加新的C++ actor类 SpawnVolume 为Actor类添加一个UBoxComponent类 用来获得一个随机的矩形区域
最终。h
// Fill out your copyright notice in the Description page of Project Settings.
#pragma once
#include "GameFramework/Actor.h"
#include "SpawnVolume.generated.h"
UCLASS()
class BATTERYCOLLECTOR_API ASpawnVolume : public AActor
{
GENERATED_BODY()
public:
// Sets default values for this actor's properties
ASpawnVolume();
protected:
// Called when the game starts or when spawned
virtual void BeginPlay() override;
public:
// Called every frame
virtual void Tick(float DeltaTime) override;
FORCEINLINE UBoxComponent* GetWhereToSpawn()const { return WhereToSpawn; }
UFUNCTION(BlueprintPure, Category = "Spawning")
FVector GetRandomPointInVolume();
private:
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Spawning", meta = (AllowPrivateAccess = "true"))
class UBoxComponent* WhereToSpawn;
};
最终。cpp
#include "BatteryCollector.h"
#include "SpawnVolume.h"
#include "Kismet/KismetMathLibrary.h" //为了使用下面的UKismetMathLibrary::RandomPointInBoundingBox
ASpawnVolume::ASpawnVolume(){ // 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;WhereToSpawn = CreateDefaultSubobject(TEXT("WhereToSpawn"));
RootComponent = WhereToSpawn;
}
// Called when the game starts or when spawned
void ASpawnVolume::BeginPlay()
{
Super::BeginPlay();
}
// Called every frame
void ASpawnVolume::Tick(float DeltaTime)
{
Super::Tick(DeltaTime);
}
FVector ASpawnVolume::GetRandomPointInVolume()
{
FVector SpawnOrigin = WhereToSpawn->Bounds.Origin;
FVector SpawnExtent = WhereToSpawn->Bounds.BoxExtent;
return UKismetMathLibrary::RandomPointInBoundingBox(SpawnOrigin, SpawnExtent);
}
