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1 | -- Created on: 1992-08-26 |
2 | -- Created by: Remi GILET |
3 | -- Copyright (c) 1992-1999 Matra Datavision |
4 | -- Copyright (c) 1999-2012 OPEN CASCADE SAS |
5 | -- |
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. |
10 | -- |
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. |
13 | -- |
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 |
16 | -- Initial Developer hereby disclaims all such warranties, including without |
17 | -- limitation, any warranties of merchantability, fitness for a particular |
18 | -- purpose or non-infringement. Please see the License for the specific terms |
19 | -- and conditions governing the rights and limitations under the License. |
20 | |
7fd59977 |
21 | |
22 | class MakeElips2d from gce inherits Root from gce |
23 | |
24 | ---Purpose :This class implements the following algorithms used to |
25 | -- create Elips2d from gp. |
26 | -- |
27 | -- * Create an ellipse from its center, and two points: |
28 | -- one on the ciconference giving the major radius, the |
29 | -- other giving the value of the small radius. |
30 | -- * Create an ellipse from its major axis and its major |
31 | -- radius and its minor radius. |
32 | |
33 | uses Pnt2d from gp, |
34 | Ax2d from gp, |
35 | Ax22d from gp, |
36 | Elips2d from gp |
37 | |
38 | raises NotDone from StdFail |
39 | |
40 | is |
41 | |
42 | Create (MajorAxis : Ax2d from gp ; |
43 | MajorRadius, MinorRadius : Real from Standard ; |
44 | Sense : Boolean from Standard = Standard_True) |
45 | returns MakeElips2d; |
46 | --- Purpose : |
47 | -- Creates an ellipse with the major axis, the major and the |
48 | -- minor radius. The location of the MajorAxis is the center |
49 | -- of the ellipse. |
50 | -- The sense of parametrization is given by Sense. |
51 | -- It is possible to create an ellipse with MajorRadius = MinorRadius. |
52 | -- the status is "InvertRadius" if MajorRadius < MinorRadius or |
53 | -- "NegativeRadius" if MinorRadius < 0.0 |
54 | |
55 | Create (A : Ax22d from gp ; |
56 | MajorRadius, MinorRadius : Real from Standard ) |
57 | returns MakeElips2d; |
58 | --- Purpose : |
59 | -- Axis defines the Xaxis and Yaxis of the ellipse which defines |
60 | -- the origin and the sense of parametrization. |
61 | -- Creates an ellipse with the AxisPlacement the major and the |
62 | -- minor radius. The location of Axis is the center |
63 | -- of the ellipse. |
64 | -- It is possible to create an ellipse with MajorRadius = MinorRadius. |
65 | -- the status is "InvertRadius" if MajorRadius < MinorRadius or |
66 | -- "NegativeRadius" if MinorRadius < 0.0 |
67 | |
68 | Create(S1,S2 : Pnt2d from gp; |
69 | Center : Pnt2d from gp) returns MakeElips2d; |
70 | ---Purpose: Makes an Elips2d with its center and two points. |
71 | -- The sense of parametrization is given by S1, S2, |
72 | -- and Center. |
73 | -- Depending on the constructor, the implicit orientation of the ellipse is: |
74 | -- - the sense defined by A, |
75 | -- - the sense defined by points Center, S1 and S2, |
76 | -- - the trigonometric sense if Sense is not given or is true, or |
77 | -- - the opposite if Sense is false. |
78 | -- It is possible to construct an ellipse where the major |
79 | -- and minor radii are equal. |
80 | -- Warning |
81 | -- If an error occurs (that is, when IsDone returns |
82 | -- false), the Status function returns: |
83 | -- - gce_InvertRadius if MajorRadius is less than MinorRadius, |
84 | -- - gce_NegativeRadius if MajorRadius or |
85 | -- MinorRadius is less than 0.0, |
86 | -- - gce_NullAxis if points S1, S2 and Center are collinear, or |
87 | -- - gce_InvertAxis if the major radius computed with |
88 | -- Center and S1 is less than the minor radius |
89 | -- computed with Center, S1 and S2. |
90 | |
91 | Value(me) returns Elips2d from gp |
92 | raises NotDone |
93 | is static; |
94 | ---C++: return const& |
95 | ---Purpose: Returns the constructed ellipse. |
96 | -- Exceptions StdFail_NotDone if no ellipse is constructed. |
97 | |
98 | Operator(me) returns Elips2d from gp |
99 | is static; |
100 | ---C++: return const& |
101 | ---C++: alias "Standard_EXPORT operator gp_Elips2d() const;" |
102 | |
103 | fields |
104 | |
105 | TheElips2d : Elips2d from gp; |
106 | --The solution from gp. |
107 | |
108 | end MakeElips2d; |
109 | |
110 | |
111 | |
112 | |