These are the functions in source code
FVector UKismetMathLibrary::GetForwardVector(FRotator InRot)
{
return FRotationMatrix(InRot).GetScaledAxis( EAxis::X );
}
FVector UKismetMathLibrary::GetRightVector(FRotator InRot)
{
return FRotationMatrix(InRot).GetScaledAxis( EAxis::Y );
}
FVector UKismetMathLibrary::GetUpVector(FRotator InRot)
{
return FRotationMatrix(InRot).GetScaledAxis( EAxis::Z );
}