nurb:Curve(knotsArray, controlArray, type)

When nurb:Curve() appears between a nurb:BeginCurve() / nurb:EndCurve() pair, it is used to describe a curve to be rendered. Positional, texture, and color coordinates are associated by presenting each as a separate nurb:Curve() between a nurb:BeginCurve() / nurb:EndCurve() pair. No more than one call to nurb:Curve() for each of color, position, and texture data can be made within a single nurb:BeginCurve() / nurb:EndCurve() pair. Exactly one call must be made to describe the position of the curve (a type of #GLU_MAP1_VERTEX_3 or #GLU_MAP1_VERTEX_4).

When nurb:Curve() appears between a nurb:BeginTrim() / nurb:EndTrim() pair, it is used to describe a trimming curve on a NURBS surface. If type is #GLU_MAP1_TRIM_2, then it describes a curve in two-dimensional (u and v) parameter space. If it is #GLU_MAP1_TRIM_3, then it describes a curve in two-dimensional homogeneous (u, v, and w) parameter space. See nurb:BeginTrim for more discussion about trimming curves.

Please consult an OpenGL reference manual for more information.

knotsArray

specifies an array of non-decreasing knot values

controlArray

specifies an array of control points; the coordinates must agree with type, specified below

type

specifies the type of the curve (see above)