enum {
	/*  Normal vectors  */
	GLU_SMOOTH	= 100000,
	GLU_FLAT	= 100001,
	GLU_NONE	= 100002,

	/*  Quadric draw styles  */
	GLU_POINT	= 100010,
	GLU_LINE	= 100011,
	GLU_FILL	= 100012,
	GLU_SILHOUETTE	= 100013,

	/*  Quadric orientation  */
	GLU_OUTSIDE	= 100020,
	GLU_INSIDE	= 100021,

	/*  Tessellator  */
	GLU_TESS_BEGIN		= 100100,
	GLU_TESS_VERTEX		= 100101,
	GLU_TESS_END		= 100102,
	GLU_TESS_ERROR		= 100103,
	GLU_TESS_EDGE_FLAG	= 100104,
	GLU_TESS_COMBINE	= 100105,

	GLU_TESS_BEGIN_DATA	= 100106,
	GLU_TESS_VERTEX_DATA	= 100107,
	GLU_TESS_END_DATA	= 100108,
	GLU_TESS_ERROR_DATA	= 100109,
	GLU_TESS_EDGE_FLAG_DATA	= 100110,
	GLU_TESS_COMBINE_DATA	= 100111,

	/*  Winding rules  */
	GLU_TESS_WINDING_ODD		= 100130,
	GLU_TESS_WINDING_NONZERO	= 100131,
	GLU_TESS_WINDING_POSITIVE	= 100132,
	GLU_TESS_WINDING_NEGATIVE	= 100133,
	GLU_TESS_WINDING_ABS_GEQ_TWO	= 100134,

	/*  Tessellation properties  */
	GLU_TESS_WINDING_RULE	= 100140,
	GLU_TESS_BOUNDARY_ONLY	= 100141,
	GLU_TESS_TOLERANCE	= 100142,

	/*  Tessellation errors  */
	GLU_TESS_ERROR1	= 100151,  /*  Missing gluBeginPolygon  */
	GLU_TESS_ERROR2 = 100152,  /*  Missing gluBeginContour  */
	GLU_TESS_ERROR3 = 100153,  /*  Missing gluEndPolygon  */
	GLU_TESS_ERROR4 = 100154,  /*  Missing gluEndContour  */
	GLU_TESS_ERROR5 = 100155,  /*   */
	GLU_TESS_ERROR6 = 100156,  /*   */
	GLU_TESS_ERROR7 = 100157,  /*   */
	GLU_TESS_ERROR8 = 100158,  /*   */

	/*  NURBS  */
	GLU_AUTO_LOAD_MATRIX	= 100200,
	GLU_CULLING		= 100201,
	GLU_PARAMETRIC_TOLERANCE = 100202,
	GLU_SAMPLING_TOLERANCE	= 100203,
	GLU_DISPLAY_MODE	= 100204,
	GLU_SAMPLING_METHOD	= 100205,
	GLU_U_STEP		= 100206,
	GLU_V_STEP		= 100207,

	GLU_PATH_LENGTH		= 100215,
	GLU_PARAMETRIC_ERROR	= 100216,
	GLU_DOMAIN_DISTANCE	= 100217,

	GLU_MAP1_TRIM_2		= 100210,
	GLU_MAP1_TRIM_3		= 100211,

	GLU_OUTLINE_POLYGON	= 100240,
	GLU_OUTLINE_PATCH	= 100241,

	GLU_NURBS_ERROR1  = 100251,   /*  spline order un-supported  */
	GLU_NURBS_ERROR2  = 100252,   /*  too few knots  */
	GLU_NURBS_ERROR3  = 100253,   /*  valid knot range is empty  */
	GLU_NURBS_ERROR4  = 100254,   /*  decreasing knot sequence  */
	GLU_NURBS_ERROR5  = 100255,   /*  knot multiplicity > spline order  */
	GLU_NURBS_ERROR6  = 100256,   /*  endcurve() must follow bgncurve()  */
	GLU_NURBS_ERROR7  = 100257,   /*  bgncurve() must precede endcurve()  */
	GLU_NURBS_ERROR8  = 100258,   /*  ctrlarray or knot vector is NULL  */
	GLU_NURBS_ERROR9  = 100259,   /*  can't draw pwlcurves  */
	GLU_NURBS_ERROR10 = 100260,   /*  missing gluNurbsCurve()  */
	GLU_NURBS_ERROR11 = 100261,   /*  missing gluNurbsSurface()  */
	GLU_NURBS_ERROR12 = 100262,   /*  endtrim() must precede endsurface()  */
	GLU_NURBS_ERROR13 = 100263,   /*  bgnsurface() must precede endsurface()  */
	GLU_NURBS_ERROR14 = 100264,   /*  curve of improper type passed as trim curve  */
	GLU_NURBS_ERROR15 = 100265,   /*  bgnsurface() must precede bgntrim()  */
	GLU_NURBS_ERROR16 = 100266,   /*  endtrim() must follow bgntrim()  */
	GLU_NURBS_ERROR17 = 100267,   /*  bgntrim() must precede endtrim()  */
	GLU_NURBS_ERROR18 = 100268,   /*  invalid or missing trim curve  */
	GLU_NURBS_ERROR19 = 100269,   /*  bgntrim() must precede pwlcurve()  */
	GLU_NURBS_ERROR20 = 100270,   /*  pwlcurve referenced twice */
	GLU_NURBS_ERROR21 = 100271,   /*  pwlcurve and nurbscurve mixed  */
	GLU_NURBS_ERROR22 = 100272,   /*  improper usage of trim data type  */
	GLU_NURBS_ERROR23 = 100273,   /*  nurbscurve referenced twice  */
	GLU_NURBS_ERROR24 = 100274,   /*  nurbscurve and pwlcurve mixed  */
	GLU_NURBS_ERROR25 = 100275,   /*  nurbssurface referenced twice  */
	GLU_NURBS_ERROR26 = 100276,   /*  invalid property  */
	GLU_NURBS_ERROR27 = 100277,   /*  endsurface() must follow bgnsurface()  */
	GLU_NURBS_ERROR28 = 100278,   /*  intersecting or misoriented trim curves  */
	GLU_NURBS_ERROR29 = 100279,   /*  intersecting trim curves  */
	GLU_NURBS_ERROR30 = 100280,   /*  UNUSED  */
	GLU_NURBS_ERROR31 = 100281,   /*  unconnected trim curves  */
	GLU_NURBS_ERROR32 = 100282,   /*  unknown knot error  */
	GLU_NURBS_ERROR33 = 100283,   /*  negative vertex count encountered  */
	GLU_NURBS_ERROR34 = 100284,   /*  negative byte-stride  */
	GLU_NURBS_ERROR35 = 100285,   /*  unknown type descriptor  */
	GLU_NURBS_ERROR36 = 100286,   /*  null control point reference  */
	GLU_NURBS_ERROR37 = 100287,   /*  duplicate point on pwlcurve  */

	/*  Errors  */
	GLU_INVALID_ENUM		= 100900,
	GLU_INVALID_VALUE		= 100901,
	GLU_OUT_OF_MEMORY		= 100902,
	GLU_INCOMPATIBLE_GL_VERSION	= 100903,

	/*  New in GLU 1.1  */
	GLU_VERSION	= 100800,
	GLU_EXTENSIONS	= 100801,

	/* ** GLU 1.0 tessellation - obsolete! ** */

	/*  Contour types  */
	GLU_CW		= 100120,
	GLU_CCW		= 100121,
	GLU_INTERIOR	= 100122,
	GLU_EXTERIOR	= 100123,
	GLU_UNKNOWN	= 100124,

	/*  Tessellator  */
	GLU_BEGIN	= GLU_TESS_BEGIN,
	GLU_VERTEX	= GLU_TESS_VERTEX,
	GLU_END		= GLU_TESS_END,
	GLU_ERROR	= GLU_TESS_ERROR,
	GLU_EDGE_FLAG	= GLU_TESS_EDGE_FLAG
};