Sophie: Io-language-graphics-and-sound-20080330-6.fc15 i686

Io-language-graphics-and-sound-20080330-6.fc15.i686.rpm

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     <STRONG>NAME</STRONG>
	  <STRONG>gluBeginCurve,</STRONG> <STRONG>gluEndCurve</STRONG> - delimit a NURBS curve
	  definition


     <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG>
	  void <STRONG>gluBeginCurve</STRONG>( GLUnurbs*	<EM>nurb</EM> )

	  void <STRONG>gluEndCurve</STRONG>( GLUnurbs* <EM>nurb</EM> )


     <STRONG>PARAMETERS</STRONG>
	  <EM>nurb</EM>	Specifies the NURBS object (created with
		<STRONG>gluNewNurbsRenderer</STRONG>).

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

	  GL evaluators	are used to render the NURBS curve as a	series
	  of line segments.  Evaluator state is	preserved during
	  rendering with <STRONG>glPushAttrib</STRONG>(<STRONG>GL_EVAL_BIT</STRONG>) and <STRONG>glPopAttrib</STRONG>().
	  See the <STRONG>glPushAttrib</STRONG> reference page for details on exactly
	  what state these calls preserve.

     <STRONG>EXAMPLE</STRONG>
	  The following	commands render	a textured NURBS curve with
	  normals; texture 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);

     <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG>
	  <STRONG>gluBeginSurface</STRONG>, <STRONG>gluBeginTrim</STRONG>, <STRONG>gluNewNurbsRenderer</STRONG>,
	  <STRONG>gluNurbsCurve</STRONG>, <STRONG>glPopAttrib</STRONG>, <STRONG>glPushAttrib</STRONG>








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