Default constructor for the OdGeEllipCone class. Constructs an elliptical cone that uses a half angle of 45°, a base origin of (0.0, 0.0, 0.0), a base radii of 1.0, an axis of symmetry of (0.0, 1.0, 0.0), a major axis of (1.0, 0.0, 0.0) and minor axis of (0.0, 0.0, -1.0).