-- File:	PConic.cdl
-- Created:	Wed Mar  4 14:28:50 1992
-- Author:	Laurent BUCHARD
--		<lbr@phobox>
---Copyright:	 Matra Datavision 1992


class PConic from IntCurve

	---Purpose: This class represents a conic from gp as a
	--          parametric curve ( in order to be used by the
	--          class PConicTool from IntCurve).

        ---Level: Internal

uses   Elips2d    from gp,
       Lin2d      from gp,
       Circ2d     from gp,
       Parab2d    from gp,
       Hypr2d     from gp,
       Ax22d      from gp,
       CurveType  from GeomAbs

is

    Create(PC: PConic from IntCurve) returns PConic from IntCurve;

    Create(E: Elips2d from gp) returns PConic from IntCurve;
    
    Create(C: Circ2d  from gp)  returns PConic from IntCurve;

    Create(P: Parab2d  from gp)  returns PConic from IntCurve;

    Create(H: Hypr2d  from gp)  returns PConic from IntCurve;

    Create(L: Lin2d   from gp)  returns PConic from IntCurve;


    SetEpsX(me: in out; EpsDist: Real from Standard) is static;
    	---Purpose: EpsX is a internal tolerance used in math 
    	--          algorithms, usually about 1e-10
    	--          (See FunctionAllRoots for more details)
    
    SetAccuracy(me: in out; Nb: Integer from Standard) is static;
    	---Purpose: Accuracy is the number of samples used to 
    	--          approximate the parametric curve on its domain.
    
    Accuracy(me) 
    	---C++: inline
    	returns Integer from Standard is static;

    EpsX(me) 
    	---C++: inline
    	returns Real from Standard is static;

    TypeCurve(me)
    	---Purpose: The Conics are manipulated as objects which only 
    	--          depend on three parameters : Axis and two Real from Standards.
    	--          Type Curve is used to select the correct Conic.
    	---C++: inline
    	returns CurveType from GeomAbs
	is static;
	
    Axis2(me)
    	---C++: inline
    	---C++: return const &
    	returns Ax22d from gp
	is static;

    Param1(me)  
    	---C++: inline
     	returns Real from Standard	is static;
	
    Param2(me) 	
    	---C++: inline
    	returns Real from Standard    is static;

fields

    axe         : Ax22d     from gp;
    prm1        : Real      from Standard;
    prm2        : Real      from Standard;
    
    TheEpsX     : Real      from Standard;
    TheAccuracy : Integer   from Standard;
    type        : CurveType from GeomAbs;

end PConic;