-- Created on: 1995-05-04
-- Created by: Laurent BOURESCHE
-- Copyright (c) 1995-1999 Matra Datavision
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
--
-- This file is part of Open CASCADE Technology software library.
--
-- This library is free software; you can redistribute it and/or modify it under
-- the terms of the GNU Lesser General Public License version 2.1 as published
-- by the Free Software Foundation, with special exception defined in the file
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
-- distribution for complete text of the license and disclaimer of any warranty.
--
-- Alternatively, this file may be used under the terms of Open CASCADE
-- commercial license or contractual agreement.

class ElSpine from ChFiDS inherits Curve from Adaptor3d

	---Purpose: Elementary  Spine for cheminements and approximations.

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

    Create returns ElSpine from ChFiDS;
    
    FirstParameter(me) returns Real from Standard
    is redefined;

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

    NbIntervals(me: in out; S : Shape from GeomAbs) 
    returns Integer is redefined static;

    Intervals(me: in out; 
    	      T : in out Array1OfReal from TColStd; 
    	      S : Shape from GeomAbs)
    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.
    is redefined;
    
    Resolution(me; R3d : Real) returns Real
    is redefined;
    
    GetType(me) returns CurveType from GeomAbs
    is redefined;

    IsPeriodic(me) returns Boolean
    is redefined;

    SetPeriodic(me : in out ; I : Boolean from Standard) is static;

    Period(me) returns Real
    is redefined;

    Value(me ; AbsC : Real ) returns Pnt from gp 
    is redefined;
    
    D0(me ; AbsC : Real ; P : out Pnt from gp) 
    is redefined;

    D1(me ; AbsC : Real ; P : out Pnt from gp; V1 : out Vec from gp) 
    is redefined;
    
    D2(me ; AbsC : Real ; P : out Pnt from gp; 
       V1,V2 : out Vec from gp)  
    is redefined;

    D3(me ; AbsC : Real ; P : out Pnt from gp; 
       V1,V2, V3 : out Vec from gp)  
    is redefined;
     
    FirstParameter(me : in out; P : Real from Standard);

    LastParameter(me : in out; P : Real from Standard);

    SetOrigin(me : in out; O : Real from Standard);

    FirstPointAndTgt(me; P : out Pnt from gp; T : out Vec from gp);

    LastPointAndTgt(me; P : out Pnt from gp; T : out Vec from gp);

    SetFirstPointAndTgt(me : in out; P : Pnt from gp; T : Vec from gp);

    SetLastPointAndTgt(me : in out; P : Pnt from gp; T : Vec from gp);

    SetCurve(me : in out; C : Curve from Geom);

    Previous(me) returns mutable SurfData from ChFiDS;
    ---C++: return const &

    ChangePrevious(me : in out) returns any SurfData from ChFiDS;
    ---C++: return &

    Next(me) returns mutable SurfData from ChFiDS;
    ---C++: return const &

    ChangeNext(me : in out) returns any SurfData from ChFiDS;
    ---C++: return &

   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;

                   
   Bezier(me) returns BezierCurve from Geom
   raises 
    	NoSuchObject from Standard
   is redefined static;
   --Purpose:  Warning : 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 : Warning : 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.
fields
 
curve     : Curve    from GeomAdaptor; 

ptfirst   : Pnt      from gp;
ptlast    : Pnt      from gp;
tgfirst   : Vec      from gp;
tglast    : Vec      from gp;

previous  : SurfData from ChFiDS;
next      : SurfData from ChFiDS; 

pfirst    : Real     from Standard;
plast     : Real     from Standard;
period    : Real     from Standard;
periodic  : Boolean  from Standard; 


end ElSpine;