/// <summary>
/// Gets tangent for a given relative position
/// </summary>
/// <param name="tf">relative position</param>
/// <returns></returns>
protected override Vector3 GetTangent(float tf)
{
return((Space == Space.World) ? Path.Module.Generator.transform.TransformDirection(PathData.InterpolateDirection(tf)) : PathData.InterpolateDirection(tf));
}