-- Created on: 1993-12-07
-- Created by: Modelistation
-- Copyright (c) 1993-1999 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 EdgeTool from BRepGProp

     --- Purpose :   Provides  the required  methods    to instantiate
     --  CGProps from GProp with a Curve from BRepAdaptor.

uses Pnt from gp,
     Vec from gp,
     Curve from BRepAdaptor,
     Shape from GeomAbs,
     Array1OfReal from TColStd
raises
    OutOfRange  from Standard

is


  FirstParameter (myclass; C : Curve from BRepAdaptor)   returns Real;
        --- Purpose :
        --  Returns the parametric value of the start point of
        --  the curve.  The curve is oriented from the start point
        --  to the end point.


  LastParameter (myclass; C : Curve from BRepAdaptor)   returns Real;
        --- Purpose :
        --  Returns the parametric value of the end point of
        --  the curve.  The curve is oriented from the start point
        --  to the end point.


  IntegrationOrder (myclass; C : Curve from BRepAdaptor)    returns Integer;
        --- Purpose :
        --  Returns the number of Gauss points required to do
        --  the integration with a good accuracy using the
        --  Gauss method.  For a polynomial curve of degree n
        --  the maxima of accuracy is obtained with an order
        --  of integration equal to 2*n-1.


  Value (myclass; C : Curve from BRepAdaptor; U : Real)  returns Pnt;
    	--- Purpose : Returns the point of parameter U on the loaded curve.


  D1 (myclass; C : Curve from BRepAdaptor; U: Real; P: out Pnt; V1: out Vec);
    	--- Purpose : 
    	--  Returns the point of parameter U and the first derivative
    	--  at this point.

  NbIntervals(myclass; C : Curve from BRepAdaptor; S : Shape from GeomAbs)
	---Purpose: Returns  the number  of  intervals for  continuity
	--          <S>. May be one if Continuity(me) >= <S>
    	returns Integer;

  Intervals(myclass; C : Curve from BRepAdaptor;
    	    	     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;

end EdgeTool;