redhat man page for gluendsurface

GLUBEGINSURFACE(3G)													       GLUBEGINSURFACE(3G)

NAME
       gluBeginSurface, gluEndSurface - delimit a NURBS surface definition

C SPECIFICATION
       void gluBeginSurface( GLUnurbs* nurb )

       void gluEndSurface( GLUnurbs* nurb )

PARAMETERS
       nurb  Specifies the NURBS object (created with gluNewNurbsRenderer).

DESCRIPTION
       Use  gluBeginSurface  to  mark  the  beginning  of  a  NURBS  surface  definition. After calling gluBeginSurface, make one or more calls to
       gluNurbsSurface to define the attributes of the surface.  Exactly one of these calls  to  gluNurbsSurface  must	have  a  surface  type	of
       GL_MAP2_VERTEX_3 or GL_MAP2_VERTEX_4.  To mark the end of the NURBS surface definition, call gluEndSurface.

       Trimming  of NURBS surfaces is supported with gluBeginTrim, gluPwlCurve, gluNurbsCurve, and gluEndTrim. See the gluBeginTrim reference page
       for details.

       GL evaluators are used to render the NURBS surface as a set of polygons.  Evaluator state is preserved during rendering with glPushAttrib(-
       GL_EVAL_BIT) and glPopAttrib().	See the glPushAttrib reference page for details on exactly what state these calls preserve.

EXAMPLE
       The  following  commands render a textured NURBS surface with normals; the texture coordinates and normals are also described as NURBS sur-
       faces:

       gluBeginSurface(nobj);
	  gluNurbsSurface(nobj, ..., GL_MAP2_TEXTURE_COORD_2);
	  gluNurbsSurface(nobj, ..., GL_MAP2_NORMAL);
	  gluNurbsSurface(nobj, ..., GL_MAP2_VERTEX_4); gluEndSurface(nobj);

SEE ALSO
       gluBeginCurve(3G), gluBeginTrim(3G), gluNewNurbsRenderer(3G), gluNurbsCurve(3G), gluNurbsSurface(3G), gluPwlCurve(3G)

															       GLUBEGINSURFACE(3G)