-- File:	Adaptor3d_HCurve.cdl
-- Created:	Wed Feb 23 11:56:42 1994
-- Author:	model
--		<model@topsn2>
---Copyright:	 Matra Datavision 1994


deferred class HCurve from Adaptor3d inherits TShared from MMgt

	---Purpose: Root class for 3D curves manipulated by handles, on
    	-- which geometric algorithms work.
    	-- An adapted curve is an interface between the
    	-- services provided by a curve and those required of
    	-- the curve by algorithms which use it.
    	-- Two derived concrete classes are provided:
    	-- - GeomAdaptor_HCurve for a curve from the Geom package
    	-- - Adaptor3d_HCurveOnSurface for a curve lying
    	--   on a surface from the Geom package.
  

uses 
     Array1OfReal    from TColStd,
     Shape           from GeomAbs,
     CurveType       from GeomAbs,
     Vec             from gp,
     Pnt             from gp,
     Circ            from gp,
     Elips           from gp,
     Hypr            from gp,
     Parab           from gp,
     Lin             from gp,
     BezierCurve     from Geom,
     BSplineCurve    from Geom,
     Curve           from Adaptor3d
     
raises
    
    OutOfRange          from Standard,
    NoSuchObject        from Standard,
    DomainError         from Standard
 
is


    --
    --  Access to the curve
    --  
    
    Curve(me) returns Curve from Adaptor3d
	---Purpose: Returns a pointer to the Curve inside the HCurve.
	--          
	---C++: return const &
    is deferred;
    
    GetCurve(me:mutable) returns Curve from Adaptor3d
	---Purpose: Returns a pointer to the Curve inside the HCurve.
	--          
	---C++: return &
    is deferred;

    --
    --     Curve  methods,  they are  provided  for convenience.  Each
    --     method M() is defined inline as :
    --     
    --     Adaptor3d_HCurve::M() { Curve().M(); }
    --     
    --     See the class Curve for comments on the methods.
    --     
    
    FirstParameter(me) returns Real;
	---C++: inline

    LastParameter(me) returns Real;
	---C++: inline
    
    Continuity(me) returns Shape from GeomAbs ;
	---C++: inline
    
    NbIntervals(me: mutable; S : Shape from GeomAbs) returns Integer;
	---C++: inline
    
    Intervals(me: mutable; T : in out Array1OfReal from TColStd; 
    	          S : Shape from GeomAbs)
	---Purpose: Stores in <T> the  parameters bounding the intervals
	--          of continuity <S>.
	--          
	--          The array must provide  enough room to  accomodate
	--          for the parameters. i.e. T.Length() > NbIntervals()
	--          
	---C++: inline
    raises
    	OutOfRange from Standard 
    is static;
    
    Trim(me; First, Last, Tol : Real) returns HCurve from Adaptor3d
	---Purpose: Returns    a  curve equivalent   of  <me>  between
	--          parameters <First>  and <Last>. <Tol>  is used  to
	--          test for 3d points confusion.
	--          
	---C++: inline
    raises
    	OutOfRange from Standard
	---Purpose: If <First> >= <Last> 
    is static;


    IsClosed(me) returns Boolean;
	---C++: inline
     
    IsPeriodic(me) returns Boolean;
	---C++: inline
    
    Period(me) returns Real
	    ---C++: inline
    raises
    	DomainError from Standard;
     
    Value(me; U : Real) returns Pnt from gp;
	---C++: inline
    
    D0 (me; U : Real; P : out Pnt from gp);
	---C++: inline
    
    D1 (me; U : Real; P : out Pnt from gp ; V : out Vec from gp)
	    ---C++: inline
     raises 
    	DomainError from Standard;
    
    D2 (me; U : Real; P : out Pnt from gp; V1, V2 : out Vec from gp)
	    ---C++: inline
     raises 
    	DomainError from Standard;

    D3 (me; U : Real; P : out Pnt from gp; V1, V2, V3 : out Vec from gp)
	    ---C++: inline
     raises 
    	DomainError from Standard;
        
    DN (me; U : Real; N : Integer)   returns Vec from gp
	    ---C++: inline
     raises  
    	DomainError from Standard,
        OutOfRange from Standard;

    Resolution(me; R3d : Real) returns Real;
	---C++: inline
        
    GetType(me) returns CurveType from GeomAbs;
	---C++: inline

     Line(me) returns Lin from gp
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
     
     Circle(me) returns Circ from gp
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
     
     Ellipse(me) returns Elips from gp
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
     
     Hyperbola(me) returns  Hypr from gp
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
     
     Parabola(me) returns Parab from gp
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
     
     Degree(me) returns Integer
	    ---C++: inline
     raises 
    	NoSuchObject from Standard ;

     
     IsRational(me) returns Boolean
     	    ---C++: inline
     raises 
    	NoSuchObject from Standard ;

     
     NbPoles(me) returns Integer
     	    ---C++: inline
     raises 
    	NoSuchObject from Standard ;

    
     NbKnots(me) returns Integer
     	    ---C++: inline
     raises 
    	NoSuchObject from Standard ;
     

     Bezier(me) returns BezierCurve from Geom
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
    
     BSpline(me) returns BSplineCurve from Geom
	    ---C++: inline
     raises 
    	NoSuchObject from Standard;
         

end HCurve;