-- ProjPCurGen,
-- UserIntConicCurveGen,
-- IntPolyPolyGen,
- -- ToolPolygon,
-- Polygon2dGen,
-- DistBetweenPCurvesGen> are Internal
--
generic class Polygon2dGen;
- generic class ToolPolygon;
-
generic class IntPolyPolyGen,ThePolygon2d,
- ThePolygon2dTool,
- InterferencePoly2d,
TheDistBetweenPCurves,
ExactIntersectionPoint;