gluendcurve man page on SunOS

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GLUBEGINCURVE(3gl)					    GLUBEGINCURVE(3gl)

NAME
       gluBeginCurve, gluEndCurve - delimit a NURBS curve definition

C SPECIFICATION
       void gluBeginCurve( GLUnurbs* nurb )

       void gluEndCurve( GLUnurbs* nurb )

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

DESCRIPTION
       Use  gluBeginCurve  to  mark the beginning of a NURBS curve definition.
       After calling gluBeginCurve, make one or more calls to gluNurbsCurve to
       define  the  attributes	of  the	 curve.	  Exactly  one of the calls to
       gluNurbsCurve  must  have  a  curve   type   of	 GL_MAP1_VERTEX_3   or
       GL_MAP1_VERTEX_4.   To mark the end of the NURBS curve definition, call
       gluEndCurve.

       GL evaluators are used to render the NURBS curve as a  series  of  line
       segments.  Evaluator state is preserved during rendering with glPushAt‐
       trib(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 curve with normals; tex‐
       ture coordinates and normals are also specified as NURBS curves:

       gluBeginCurve(nobj);
	  gluNurbsCurve(nobj, ..., GL_MAP1_TEXTURE_COORD_2);
	  gluNurbsCurve(nobj, ..., GL_MAP1_NORMAL);
	  gluNurbsCurve(nobj, ..., GL_MAP1_VERTEX_4);
       gluEndCurve(nobj);

SEE ALSO
       gluBeginSurface,	 gluBeginTrim,	 gluNewNurbsRenderer,	gluNurbsCurve,
       glPopAttrib, glPushAttrib

				   15 Mar 97		    GLUBEGINCURVE(3gl)
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