private static bool ValidatePolygon(Vertices polygon) { PolygonError errorCode = polygon.CheckPolygon(); if (errorCode == PolygonError.InvalidAmountOfVertices || errorCode == PolygonError.AreaTooSmall || errorCode == PolygonError.SideTooSmall || errorCode == PolygonError.NotSimple) return false; if (errorCode == PolygonError.NotCounterClockWise) //NotCounterCloseWise is the last check in CheckPolygon(), thus we don't need to call ValidatePolygon again. polygon.Reverse(); if (errorCode == PolygonError.NotConvex) { polygon = GiftWrap.GetConvexHull(polygon); return ValidatePolygon(polygon); } return true; }