NAME
	  gluNextContour - mark	the beginning of another contour


     C SPECIFICATION
	  void gluNextContour( GLUtesselator* tess,
			       GLenum type )


     PARAMETERS
	  tess	Specifies the tessellation object (created with
		gluNewTess).

	  type	Specifies the type of the contour being	defined. Valid
		values are GLU_EXTERIOR, GLU_INTERIOR, GLU_UNKNOWN,
		GLU_CCW, and GLU_CW.

     DESCRIPTION
	  gluNextContour is used in describing polygons	with multiple
	  contours. After the first contour has	been described through
	  a series of gluTessVertex calls, a gluNextContour call
	  indicates that the previous contour is complete and that the
	  next contour is about	to begin.  Another series of
	  gluTessVertex	calls is then used to describe the new
	  contour. This	process	can be repeated	until all contours
	  have been described.

	  type defines what type of contour follows.  The legal
	  contour types	are as follows:

	  GLU_EXTERIOR	    An exterior	contour	defines	an exterior
			    boundary of	the polygon.

	  GLU_INTERIOR	    An interior	contour	defines	an interior
			    boundary of	the polygon (such as a hole).

	  GLU_UNKNOWN	    An unknown contour is analyzed by the
			    library to determine if it is interior or
			    exterior.

	  GLU_CCW,

	  GLU_CW	    The	first GLU_CCW or GLU_CW	contour
			    defined is considered to be	exterior. All
			    other contours are considered to be
			    exterior if	they are oriented in the same
			    direction (clockwise or counterclockwise)
			    as the first contour, and interior if they
			    are	not.

	  If one contour is of type GLU_CCW or GLU_CW, then all
	  contours must	be of the same type (if	they are not, then all
	  GLU_CCW and GLU_CW contours will be changed to GLU_UNKNOWN).

	  Note that there is no	real difference	between	the GLU_CCW
	  and GLU_CW contour types.

	  Before the first contour is described, gluNextContour	can be
	  called to define the type of the first contour.  If
	  gluNextContour is not	called before the first	contour, then
	  the first contour is marked GLU_EXTERIOR.

	  This command is obsolete and is provided for backward
	  compatibility	only. Calls to gluNextContour are mapped to
	  gluTessEndContour followed by	gluTessBeginContour.

     EXAMPLE
	  A quadrilateral with a triangular hole in it can be
	  described as follows:

	  gluBeginPolygon(tobj);
	     gluTessVertex(tobj, v1, v1);
	     gluTessVertex(tobj, v2, v2);
	     gluTessVertex(tobj, v3, v3);
	     gluTessVertex(tobj, v4, v4); gluNextContour(tobj,
	  GLU_INTERIOR);
	     gluTessVertex(tobj, v5, v5);
	     gluTessVertex(tobj, v6, v6);
	     gluTessVertex(tobj, v7, v7); gluEndPolygon(tobj);

     SEE ALSO
	  gluBeginPolygon, gluNewTess, gluTessCallback,	gluTessVertex,
	  gluTessBeginContour