[Unreal Engine] FMath::Lerp

FMath::Lerp esegue un’interpolazione lineare tra due valori, l’Alpha varia da 0 a 1.

template<class T, class U>
static T Lerp
(
    const T & A,
    const T & B,
    const U & Alpha
)

Esempio

Script di esempio per la rotazione.

MioScript.h:

 private:
      float TargetYaw = 10.f; // 360.f
      float InitialYaw; // 270.f
      float CurrentYaw;

MioScript.cpp:

 // Called when the game starts
void UMioScript::BeginPlay()
{
      Super::BeginPlay();

      // HERE BEGIN CODE
      InitialYaw = GetOwner()->GetActorRotation().Yaw;
      CurrentYaw = InitialYaw;
      TargetYaw = InitialYaw + 90.f;
}


// Called every frame
void UMioScript::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)
{
      Super::TickComponent(DeltaTime, TickType, ThisTickFunction);

      // HERE BEGIN CODE
      CurrentYaw = FMath::Lerp(CurrentYaw, TargetYaw, 0.02f);
      FRotator DoorRotation = GetOwner()->GetActorRotation();
      DoorRotation.Yaw = CurrentYaw;
      GetOwner()->SetActorRotation(DoorRotation);
}