Index for Section 3

Alphabetical listing for G

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gluBeginSurface()
NAME
  gluBeginSurface, gluEndSurface - delimit a NURBS surface definition

SYNOPSIS
  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 surfaces:

       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),
  gluNurbsCurve(3), gluNurbsSurface(3), gluPwlCurve(3)

Index for Section 3

Alphabetical listing for G

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