ue4中模式设定

来源：互联网发布：office2016激活软件编辑：程序博客网时间：2024/05/16 19:15

1、以观察者的视角（Spectator）

那么在Word Setting中Default Pawn和Spectator两者要设置为同一个类

此模式中，摄像机组件是在这个Spectator中create并且控制，还可以绑定Input事件

class AMySpectator : public ASpectatorPawn
{
    GENERATED_BODY()

public:
    AMySpectator();
    virtual ~AMySpectator();

    // Begin ADefaultPawn interface 重写这几个方法
    virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) override;
    virtual void MoveForward(float Val) override;
    virtual void MoveRight(float Val) override;
    // End ADefaultPawn interface

实现部分

void AMySpectator::SetupPlayerInputComponent(class UInputComponent* InputComponent)
{
    Super::SetupPlayerInputComponent(InputComponent);
    check(InputComponent);

    InputComponent->BindAction("ZoomOut", IE_Pressed, this, &AMySpectator::OnMouseScrollUp);
    InputComponent->BindAction("ZoomIn", IE_Pressed, this, &AMySpectator::OnMouseScrollDown);

    InputComponent->BindAxis("MoveForward", this, &AMySpectator::MoveForward);
    InputComponent->BindAxis("MoveRight", this, &AMySpectator::MoveRight);
}

*此处有坑

使用观察这模式下，必须禁止引擎去生成默认的 SpectatorPawn 。反之，以第三人称或第一人称则不能禁止

通过重写 AGameMode的一个方法
.h

class MYSLATE_API AMyGameMode : public AGameMode
{
    GENERATED_BODY()
public:
    /**
    * Handle new player, skips pawn spawning.
    * @param NewPlayer
    */
    virtual void RestartPlayer(AController* NewPlayer) override;
};

.cpp

void AMyGameMode::RestartPlayer(AController* NewPlayer)
{
    AActor* const StartSpot = FindPlayerStart(NewPlayer);
    if (StartSpot != nullptr)
    {
        // initialize and start it up
        InitStartSpot(StartSpot, NewPlayer);

        AMyPlayerCtrler* const NewPC = Cast<AMyPlayerCtrler>(NewPlayer);
        if (NewPC != nullptr)
        {
            NewPC->SetInitialLocationAndRotation(StartSpot->GetActorLocation(), StartSpot->GetActorRotation());
        }
    }
    else
    {
        UE_LOG(GameLogger, Warning, TEXT("Player start not found, failed to restart player"));
    }
}

不然引擎会调用原有的 RestartPlayer 方法，把自定的SpectatorPawn 置空
void AGameMode::RestartPlayer(AController* NewPlayer)
NewPlayer->Possess(NewPlayer->GetPawn());
void APlayerController::ChangeState(FName NewState)
void APlayerController::EndSpectatingState()
void APlayerController::DestroySpectatorPawn()

SetSpectatorPawn(NULL);

2、以第三人称或第一人称视角

摄像机是绑定在一个实体Character上，测试Spectator Class是无效的

UCLASS()
class AMyPlayerChar : public AMyChar
{
    GENERATED_BODY()

    /** Top down camera */
    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))
    class UCameraComponent* TopDownCameraComponent;

    /** Camera boom positioning the camera above the character */
    UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Camera, meta = (AllowPrivateAccess = "true"))

class USpringArmComponent* CameraBoom;

3、c++接收不到绑定事件的原因

在蓝图中由对应事件的实现，必须干掉，在c++才能接收到事件

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