OpenGL(15)GLU库API

/****           Backwards compatibility for old tesselator           ****/
//定义一个非凸多边形 
void APIENTRY   gluBeginPolygon( GLUtesselator *tess );
//为其他轮廓的开始做标记 
void APIENTRY   gluNextContour(  GLUtesselator *tess, 
                                 GLenum        type );
//定义一个非凸多边形 
void APIENTRY   gluEndPolygon(   GLUtesselator *tess );

/****           Callback function prototypes    ****/

/* gluQuadricCallback */
typedef void (CALLBACK* GLUquadricErrorProc) (GLenum);

/* gluTessCallback */
typedef void (CALLBACK* GLUtessBeginProc)        (GLenum);
typedef void (CALLBACK* GLUtessEdgeFlagProc)     (GLboolean);
typedef void (CALLBACK* GLUtessVertexProc)       (void *);
typedef void (CALLBACK* GLUtessEndProc)          (void);
typedef void (CALLBACK* GLUtessErrorProc)        (GLenum);
typedef void (CALLBACK* GLUtessCombineProc)      (GLdouble[3],
                                                  void*[4], 
                                                  GLfloat[4],
                                                  void** );
typedef void (CALLBACK* GLUtessBeginDataProc)    (GLenum, void *);
typedef void (CALLBACK* GLUtessEdgeFlagDataProc) (GLboolean, void *);
typedef void (CALLBACK* GLUtessVertexDataProc)   (void *, void *);
typedef void (CALLBACK* GLUtessEndDataProc)      (void *);
typedef void (CALLBACK* GLUtessErrorDataProc)    (GLenum, void *);
typedef void (CALLBACK* GLUtessCombineDataProc)  (GLdouble[3],
                                                  void*[4], 
                                                  GLfloat[4],
                                                  void**,
                                                  void* );