6.7.13 NURBSURF (k1, k2, m)

Creates a nurbs surface with knot vectors k1 and k2, and control point matrix m.

k1, k2 and m are typeless nodes to which the knots respectively rows of the control point matrix are connected.

In the C++ class hierarchy the class created by the NURBSURF keyword is derived from a general trimmed nurbs surface class (see TNURBSURF, 6.7.22), so that it can be used at any places where a trimmed nurbs surface is expected (with the same number format and control point type of course)

The following variations of this keyword exist (some of them define the same internal structures, and are only defined to allow consistent naming conventions):

Keyword	numbers	control points	remarks
NURBSURF	float	homogeneous,3D
NURBSURF_F	float	homogeneous,3D
NURBSURF_D	double	homogeneous,3D
NURBSURF_E1	float	euclidian,1D	cannot be rendered
NURBSURF_E3	float	euclidian,3D
NURBSURF_H1	float	homogeneous,1D	cannot be rendered
NURBSURF_H3	float	homogeneous,3D
NURBSURF_F_E1	float	euclidean,1D	cannot be rendered
NURBSURF_F_E3	float	euclidean,3D
NURBSURF_F_H1	float	homogeneous,1D	cannot be rendered
NURBSURF_F_H3	float	homogeneous,3D
NURBSURF_D_E1	double	euclidean,1D	cannot be rendered
NURBSURF_D_E3	double	euclidean,3D
NURBSURF_D_H1	double	homogeneous,1D	cannot be rendered
NURBSURF_D_H3	double	homogeneous,3D