6.7.12 NURBSUBS (ru, rv, s)

Creates a nurbs surface defined by subranges ru and rv of the parametric uv-domain of another nurbs surface s.

ru and rv are typeless nodes to which the lower and upper bound of the subranges for u and v of the parametric domain of the other nurbs surface are connected, s must be of type TNURBSURF (see 6.7.22).

In the C++ class hierarchy the class created by the NURBSUBS 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
NURBSUBS	float	homogeneous,3D
NURBSUBS_F	float	homogeneous,3D
NURBSUBS_D	double	homogeneous,3D
NURBSUBS_E1	float	euclidian,1D	cannot be rendered
NURBSUBS_E3	float	euclidian,3D
NURBSUBS_H1	float	homogeneous,1D	cannot be rendered
NURBSUBS_H3	float	homogeneous,3D
NURBSUBS_F_E1	float	euclidean,1D	cannot be rendered
NURBSUBS_F_E3	float	euclidean,3D
NURBSUBS_F_H1	float	homogeneous,1D	cannot be rendered
NURBSUBS_F_H3	float	homogeneous,3D
NURBSUBS_D_E1	double	euclidean,1D	cannot be rendered
NURBSUBS_D_E3	double	euclidean,3D
NURBSUBS_D_H1	double	homogeneous,1D	cannot be rendered
NURBSUBS_D_H3	double	homogeneous,3D