gluTessEndContour
Marks the end of the current contour being defined for tessellation in the GLU tessellator.
This method is used to signal the completion of a contour definition that was initiated by a previous call to gluTessBeginContour. The defined contour, along with its vertices, becomes part of the current polygon being specified.
gluTessEndContour should always be called after defining all vertices for a contour to ensure completeness. After completing a contour, additional contours can be defined by calling gluTessBeginContour again if needed. Once all contours have been defined for a polygon, the process can be completed by calling gluTessEndPolygon.