gluEndSurface man page on OSF1

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gluBeginSurface()					     gluBeginSurface()

NAME
       gluBeginSurface, gluEndSurface - delimit a NURBS surface definition

SYNOPSIS
       void gluBeginSurface(
	       GLUnurbs* nurb ); void gluEndSurface(
	       GLUnurbs* nurb );

PARAMETERS
       Specifies the NURBS object (created with gluNewNurbsRenderer).

DESCRIPTION
       Use  gluBeginSurface() to mark the beginning of a NURBS surface defini‐
       tion. 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 sur‐
       face definition, call gluEndSurface().

       Trimming of NURBS surfaces is supported	with  gluBeginTrim(),  gluPwl‐
       Curve(), gluNurbsCurve(), and gluEndTrim(). See the gluBeginTrim() ref‐
       erence page for details.

       GL evaluators are used to render the NURBS surface as a	set  of	 poly‐
       gons.   Evaluator  state	 is  preserved during rendering with glPushAt‐
       trib()(GL_EVAL_BIT) and glPopAttrib()().	 See the glPushAttrib() refer‐
       ence 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(3),   gluBeginTrim(3),  gluNewNurbsRenderer(3),  gluNurb‐
       sCurve(3), gluNurbsSurface(3), gluPwlCurve(3)

							     gluBeginSurface()
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