Normal of the view that will display the shape being built. Must be set explicitly before adding any geometry. Must be a unit vector. This is used to validate incoming geometry - it must be orthogonal to the viewNormal.

public XYZ ViewNormal { get; set; }

Public Property ViewNormal As XYZ
	Get
	Set

public:
property XYZ^ ViewNormal {
	XYZ^ get ();
	void set (XYZ^ value);
}