NurbsCurve is a 3D curve analogous to NurbsPatchSurface.
The NurbsCurve node belongs to the NURBS component and requires at least level 1, its default container field is geometry. It is available from X3D version 3.0 or higher.
1 2 3 4 + X3DNode + X3DGeometryNode + X3DParametricGeometryNode + NurbsCurve
Hint for surface tessellation.
Whether or not the curve is closed (i.e. matching end values).
Define order of surface by polynomials of degree = order-1.
knot vector, where size = number of control points + order of curve.
Vector assigning relative weight value to each control point.