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6.7.3 NUBGAS *(du, nu, dv, nv, m)*

Creates a nurbs surface of degree *du* and *dv* with *nv* *
*nu* 3 dimensional euclidian control points, which approximates a matrix
of data points *m* by Global Approximation.

*du*,*nu*,*dv* and *nv*
are number nodes, and *m* is a typeless node to which the rows of
the matrix of data points are connected.

In the C++ class hierarchy the class created by the NUBGAS 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 |

**NUBGAS ** |
float |

**NUBGAS_F ** |
float |

**NUBGAS_D ** |
double |

**NUBGAS_F_E3 ** |
float |

**NUBGAS_D_E3 ** |
double |

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2002-01-20