-- File:      GeomAdaptor_Curve.cdl
-- Created:   Tue Sep  1 10:58:10 1992
-- Author:    Modelistation
---Copyright: Matra Datavision 1992

class Curve from GeomAdaptor inherits Curve from Adaptor3d
        
    	---Purpose: This class provides an interface between the services provided by any
    	-- curve from the package Geom and those required of the curve by algorithms which use it.
        
uses Vec                  from gp,
     Pnt                  from gp,
     Circ                 from gp,
     Elips                from gp,
     Hypr                 from gp,
     Parab                from gp,
     Lin                  from gp,
     Array1OfReal         from TColStd,
     Curve                from Geom,
     BezierCurve          from Geom,
     BSplineCurve         from Geom,
     CurveType            from GeomAbs,
     Shape                from GeomAbs,
     HCurve               from Adaptor3d
     
raises NoSuchObject from Standard,
       ConstructionError from Standard,
       OutOfRange  from Standard,
       DomainError from Standard


is

   Create 
   returns Curve from GeomAdaptor;
    	---C++: inline

   Create(C : Curve from Geom) 
   returns Curve from GeomAdaptor;
    	---C++: inline

   Create(C : Curve from Geom; UFirst,ULast : Real)
   returns Curve from GeomAdaptor
   raises 
    	ConstructionError from Standard;
        ---Purpose: ConstructionError is raised if Ufirst>Ulast
    	---C++: inline
   
   Load(me : in out; C : Curve from Geom);
    	---C++: inline
   
   Load(me : in out; C : Curve from Geom; UFirst,ULast : Real)
   raises 
    	ConstructionError from Standard;
    	---Purpose: ConstructionError is raised if Ufirst>Ulast

   Curve(me) returns Curve from Geom
        ---Purpose:
    	-- Provides a curve inherited from Hcurve from Adaptor.
    	-- This is inherited to provide easy to use constructors.
    	---C++: return const& 
    	---C++: inline
   is static;



   FirstParameter(me) returns Real
	---C++: inline
   is redefined static;

   LastParameter(me) returns Real
	---C++: inline
   is redefined static;     

   Continuity(me) returns Shape from GeomAbs
   is redefined static;

   NbIntervals(me:in out; S : Shape from GeomAbs) returns Integer
	---Purpose: Returns  the number  of  intervals for  continuity
	--          <S>. May be one if Continuity(me) >= <S>
   is redefined static;

   Intervals(me: in out; 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()
   raises
    	OutOfRange from Standard 
   is redefined 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.
   raises
    	OutOfRange from Standard
	---Purpose: If <First> >= <Last> 
   is redefined static;
    
   IsClosed(me) returns Boolean
   is redefined static;
    
   IsPeriodic(me) returns Boolean
   is redefined static;

   Period(me) returns Real
   raises
    	DomainError from Standard -- if the curve is not periodic
   is redefined static;

    
   Value(me; U : Real) returns Pnt from gp
        --- Purpose : Computes the point of parameter U on the curve 
   is redefined static;

   D0 (me; U : Real; P : out Pnt from gp)
        --- Purpose : Computes the point of parameter U.
   is redefined static;

   D1 (me; U : Real; P : out Pnt from gp ; V : out Vec from gp)
        --- Purpose : Computes the point of parameter U on the curve 
        --  with its first derivative.
        --  
    	--  Warning : On the specific case of BSplineCurve:
    	--  if the curve is cut in interval of continuity at least C1, the
    	--  derivatives are computed on the current interval.
    	--  else the derivatives are computed on the basis curve.
   is redefined static;
    
   D2 (me; U : Real; P : out Pnt from gp; V1, V2 : out Vec from gp)
        --- Purpose :
        --  Returns the point P of parameter U, the first and second
        --  derivatives V1 and V2.
        --  
    	--  Warning : On the specific case of BSplineCurve:
    	--  if the curve is cut in interval of continuity at least C2, the
    	--  derivatives are computed on the current interval.
    	--  else the derivatives are computed on the basis curve.
   is redefined static;

   D3 (me; U : Real; P : out Pnt from gp; V1, V2, V3 : out Vec from gp)
        --- Purpose :
        --  Returns the point P of parameter U, the first, the second 
        --  and the third derivative.
        --  
    	--  Warning : On the specific case of BSplineCurve:
    	--  if the curve is cut in interval of continuity at least C3, the
    	--  derivatives are computed on the current interval.
    	--  else the derivatives are computed on the basis curve.
   is redefined static;
        
   DN (me; U : Real; N : Integer)   returns Vec from gp
        --- Purpose :
        --  The returned vector gives the value of the derivative for the 
        --  order of derivation N.
    	--  Warning : On the specific case of BSplineCurve:
    	--  if the curve is cut in interval of continuity CN, the
    	--  derivatives are computed on the current interval.
    	--  else the derivatives are computed on the basis curve.
   raises  
        OutOfRange from Standard
        --- Purpose : Raised if N < 1.            
   is redefined static;


   Resolution(me; R3d :Real) returns Real
        ---Purpose : returns the parametric resolution
   is redefined static;   
   

   GetType(me) returns CurveType from GeomAbs
    	---C++: inline
   is redefined static;

   Line(me) returns Lin from gp
   raises 
    	NoSuchObject from Standard
   is redefined static;
   
   Circle(me) returns Circ from gp
   raises 
    	NoSuchObject from Standard
   is redefined static;

   Ellipse(me) returns Elips from gp
   raises 
    	NoSuchObject from Standard
   is redefined static;

   Hyperbola(me) returns  Hypr from gp
   raises 
    	NoSuchObject from Standard
   is redefined static;

   Parabola(me) returns Parab from gp
   raises 
    	NoSuchObject from Standard
   is redefined static;

    
   Degree(me) returns Integer
    raises 
    	NoSuchObject from Standard
    is redefined static;
     ---Purpose: 
     --          this should NEVER make a copy
     --          of the underlying curve to read
     --          the relevant information
     --          
   IsRational(me) returns Boolean
    raises 
    	NoSuchObject from Standard
    is redefined static;
    
     ---Purpose: 
     --          this should NEVER make a copy
     --          of the underlying curve to read
     --          the relevant information
     --             
   NbPoles(me) returns Integer
     raises 
    	NoSuchObject from Standard
    is redefined static;

     ---Purpose: 
     --          this should NEVER make a copy
     --          of the underlying curve to read
     --          the relevant information
     --            
   NbKnots(me) returns Integer
     raises 
    	NoSuchObject from Standard
    is redefined static;     
     ---Purpose: 
     --          this should NEVER make a copy
     --          of the underlying curve to read
     --          the relevant information
     --                    

   Bezier(me) returns BezierCurve from Geom
   raises 
    	NoSuchObject from Standard
   is redefined static;
   ---Purpose : this will NOT make a copy of the
    --         Bezier Curve : If you want to modify
    --         the Curve please make a copy yourself
    --         Also it will NOT trim the surface to
    --         myFirst/Last.
    
   BSpline(me) returns BSplineCurve from Geom
   raises 
    	NoSuchObject from Standard
   is redefined static;
    ---Purpose : this will NOT make a copy of the
    --         BSpline Curve : If you want to modify
    --         the Curve please make a copy yourself
    --         Also it will NOT trim the surface to
    --         myFirst/Last.
     

   LocalContinuity(me; U1, U2 : Real) returns Shape from GeomAbs 
   is static private;
   
fields 

  myCurve             : Curve            from Geom ;
  myTypeCurve         : CurveType        from GeomAbs ;
  myFirst             : Real             from Standard ;
  myLast              : Real             from Standard;
  
friends
    class Surface from GeomAdaptor
    
end Curve;