UE4 c++ 创建刚体Cube

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1 新建一个Actor，一会用蓝图继承这个

TCubeActor.h

#pragma once#include "CoreMinimal.h"#include "GameFramework/Actor.h"#include "Runtime/Engine/Classes/Components/StaticMeshComponent.h"#include "TCubeActor.generated.h"UCLASS()class TVIVIMOVEDEMO3_API ATCubeActor : public AActor{GENERATED_BODY()public:// Sets default values for this actor's propertiesATCubeActor();protected:// Called when the game starts or when spawnedvirtual void BeginPlay() override;public:// Called every framevirtual void Tick(float DeltaTime) override;UStaticMeshComponent * CubeMesh;};

TCubeActor.cpp

#include "TCubeActor.h"// Sets default valuesATCubeActor::ATCubeActor(){ PrimaryActorTick.bCanEverTick = true;CubeMesh = FindComponentByClass<UStaticMeshComponent>();RootComponent = CubeMesh;}// Called when the game starts or when spawnedvoid ATCubeActor::BeginPlay(){Super::BeginPlay();}// Called every framevoid ATCubeActor::Tick(float DeltaTime){Super::Tick(DeltaTime);}

重点在于把Cube提升为RootComp，否则创建出来Cube永远在v（0,0，0）点，即使Actor点位置动态改变Cube绝对位置也不随Actor改变

2 创建蓝图TCubeBP

加一个Cube，打开物理开关

3 c++动态在某个位置生成这个BP

FVector v = FVector(1000,0,0);FRotator r = FRotator(0, 0, 0);GetWorld()->SpawnActor<AActor>(TCubeClass,v,r);

一些问题记录

可以使用

UStaticMeshComponent * CubeMesh = FindComponentByClass<UStaticMeshComponent>();CubeMesh->SetSimulatePhysics(true);

开启关闭物理

如果TCubeBP中物理没打开，可以直接通过SetActorLocation设置Cube位置(RootComp被修改为Cube后)

如果TCubeBP中物理已经打开，那么动态关掉物理后Cube物理效果是没了，但是不能再通过SetActorLocation设置位置，原因未知

https://answers.unrealengine.com/questions/216929/how-can-i-spawn-an-actor-at-a-specific-location-in.html

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