#include <TColStd_Array1OfReal.hxx>
#include <Standard_Boolean.hxx>
#include <GeomAbs_CurveType.hxx>
-class Standard_OutOfRange;
-class Standard_NoSuchObject;
-class Standard_DomainError;
class TopoDS_Edge;
class TopoDS_Vertex;
-class gp_Pnt;
class gp_Vec;
class gp_Lin;
class gp_Circ;