1 -- Created on: 1993-03-24
3 -- Copyright (c) 1993-1999 Matra Datavision
4 -- Copyright (c) 1999-2012 OPEN CASCADE SAS
6 -- The content of this file is subject to the Open CASCADE Technology Public
7 -- License Version 6.5 (the "License"). You may not use the content of this file
8 -- except in compliance with the License. Please obtain a copy of the License
9 -- at http://www.opencascade.org and read it completely before using this file.
11 -- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
12 -- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
14 -- The Original Code and all software distributed under the License is
15 -- distributed on an "AS IS" basis, without warranty of any kind, and the
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17 -- limitation, any warranties of merchantability, fitness for a particular
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25 deferred class BoundedCurve from Geom2d inherits Curve from Geom2d
27 --- Purpose : The abstract class BoundedCurve describes the
28 -- common behavior of bounded curves in 2D space. A
29 -- bounded curve is limited by two finite values of the
30 -- parameter, termed respectively "first parameter" and
31 -- "last parameter". The "first parameter" gives the "start
32 -- point" of the bounded curve, and the "last parameter"
33 -- gives the "end point" of the bounded curve.
34 -- The length of a bounded curve is finite.
35 -- The Geom2d package provides three concrete
36 -- classes of bounded curves:
37 -- - two frequently used mathematical formulations of complex curves:
38 -- - Geom2d_BezierCurve,
39 -- - Geom2d_BSplineCurve, and
40 -- - Geom2d_TrimmedCurve to trim a curve, i.e. to
41 -- only take part of the curve limited by two values of
42 -- the parameter of the basis curve.
49 EndPoint (me) returns Pnt2d is deferred;
51 -- Returns the end point of the curve.
52 -- The end point is the value of the curve for the
53 -- "LastParameter" of the curve.
56 StartPoint (me) returns Pnt2d is deferred;
58 -- Returns the start point of the curve.
59 -- The start point is the value of the curve for the
60 -- "FirstParameter" of the curve.