1 -- Created on: 1992-09-28
2 -- Created by: Remi GILET
3 -- Copyright (c) 1992-1999 Matra Datavision
4 -- Copyright (c) 1999-2014 OPEN CASCADE SAS
6 -- This file is part of Open CASCADE Technology software library.
8 -- This library is free software; you can redistribute it and/or modify it under
9 -- the terms of the GNU Lesser General Public License version 2.1 as published
10 -- by the Free Software Foundation, with special exception defined in the file
11 -- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 -- distribution for complete text of the license and disclaimer of any warranty.
14 -- Alternatively, this file may be used under the terms of Open CASCADE
15 -- commercial license or contractual agreement.
17 class MakeSegment from GCE2d inherits Root from GCE2d
19 ---Purpose: Implements construction algorithms for a line
20 -- segment in the plane. The result is a
21 -- Geom2d_TrimmedCurve curve.
22 -- A MakeSegment object provides a framework for:
23 -- - defining the construction of the line segment,
24 -- - implementing the construction algorithm, and
25 -- - consulting the results. In particular, the Value
26 -- function returns the constructed line segment.
32 TrimmedCurve from Geom2d
34 raises NotDone from StdFail
38 Create(P1, P2 : Pnt2d from gp ) returns MakeSegment;
39 ---Purpose: Make a segment of Line from the 2 points <P1> and <P2>.
40 -- Status is "ConfusedPoints" if <P1> and <P2> are confused.
42 Create(P1 : Pnt2d from gp ;
44 P2 : Pnt2d from gp ) returns MakeSegment;
45 ---Purpose: Make a segment of Line from the point <P1> with
46 -- the direction <P> and ended by the projection of
47 -- <P2> on the line <P1,V>.
48 -- Status is "ConfusedPoints" if <P1> and <P2> are confused.
50 Create(Line : Lin2d from gp ;
51 U1, U2 : Real from Standard ) returns MakeSegment;
52 ---Purpose: Make a segment of Line from the line <Line>
53 -- between the two parameters U1 and U2.
54 -- Status is "SameParamters" if <U1> is equal <U2>.
56 Create(Line : Lin2d from gp ;
57 Point : Pnt2d from gp ;
58 Ulast : Real from Standard ) returns MakeSegment;
59 ---Purpose: Make a segment of Line from the line <Line>
60 -- between the point <Point> and the parameter Ulast.
61 -- It returns NullObject if <U1> is equal <U2>.
63 Create(Line : Lin2d from gp ;
65 P2 : Pnt2d from gp ) returns MakeSegment;
66 ---Purpose: Make a segment of Line from the line <Line>
67 -- between the two points <P1> and <P2>.
68 -- It returns NullObject if <P1> and <P2> are confused.
70 -- If the points which limit the segment are coincident
71 -- for given points or for the projection of given points
72 -- on the line which supports the line segment (that is,
73 -- when IsDone returns false), the Status function
74 -- returns gce_ConfusedPoints. This warning only
75 -- concerns the first two constructors.
77 Value(me) returns TrimmedCurve from Geom2d
81 ---Purpose: Returns the constructed line segment.
82 -- Exceptions StdFail_NotDone if no line segment is constructed.
84 Operator(me) returns TrimmedCurve from Geom2d
87 ---C++: alias "Standard_EXPORT operator Handle_Geom2d_TrimmedCurve() const;"
91 TheSegment : TrimmedCurve from Geom2d;
92 --The solution from Geom2d.