/// <summary>
 /// Initializes a new instance of the <see cref="TransformationHierarchyNode"/> class.
 /// </summary>
 /// <param name="localTransformation">The node transformation.</param>
 /// <param name="parent">The parent transformation hierarchy node.</param>
 public TransformationHierarchyNode(Transformation localTransformation, TransformationHierarchyNode parent)
 {
     globalTransform     = new CachedCalculatedValue <Transformation>(CalcGlobalTransformation);
     LocalTransformation = localTransformation;
     Parent = parent;
 }