C++/Helpful Functions Collection

This function will copy an existing USplineComponent* and return a new one with the same attributes:

// Create a new SplineComponent and copy data from the reference to it.

UFUNCTION(Category="EXAMPLES")

FORCEINLINE USplineComponent* CopySpline(const USplineComponent* ReferenceSpline)

{

   USplineComponent* NewSpline = Cast<USplineComponent>(AddComponentByClass(

      USplineComponent::StaticClass(), false, FTransform(), false));

   NewSpline->SetWorldTransform(ReferenceSpline->GetComponentTransform());

   for (int32 i = 0; i < ReferenceSpline->GetNumberOfSplinePoints(); i++)

   {

      FVector Location = ReferenceSpline->GetLocationAtSplinePoint(

         i, World) - FVector(0.0, 0.0, 100.0);

      FRotator Rotation = ReferenceSpline->GetRotationAtSplinePoint(

         i, World);

      auto ArriveTangent = ReferenceSpline->GetArriveTangentAtSplinePoint(

         i, World);

      auto LeaveTangent = ReferenceSpline->GetLeaveTangentAtSplinePoint(

         i, World);

      auto UpVector = ReferenceSpline->GetUpVectorAtSplinePoint(

         i, World);

      // Set spline points (and add if needed)

      if (i > 1)

         NewSpline->AddSplinePoint(Location, World);

      else

         NewSpline->SetLocationAtSplinePoint(i, Location, World);

      NewSpline->SetRotationAtSplinePoint(i, Rotation, World);

      NewSpline->SetTangentsAtSplinePoint(i, ArriveTangent, LeaveTangent, World);

      NewSpline->SetUpVectorAtSplinePoint(i, UpVector, World);

      // Colors

      NewSpline->SetTangentColor(DefaultColor);

      NewSpline->SetSelectedSplineSegmentColor(DefaultColor);

      NewSpline->SetUnselectedSplineSegmentColor(DefaultColor);

   }

   NewSpline->SetClosedLoop(ReferenceSpline->IsClosedLoop());

   return NewSpline;

}