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1 | -- Created on: 1996-12-05 |
2 | -- Created by: Jean-Pierre COMBE/Odile Olivier |
3 | -- Copyright (c) 1996-1999 Matra Datavision |
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4 | -- Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | -- |
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6 | -- This file is part of Open CASCADE Technology software library. |
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7 | -- |
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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 |
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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. |
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13 | -- |
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14 | -- Alternatively, this file may be used under the terms of Open CASCADE |
15 | -- commercial license or contractual agreement. |
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16 | |
17 | class TangentRelation from AIS inherits Relation from AIS |
18 | ---Purpose: A framework to display tangency constraints between |
19 | -- two or more Interactive Objects of the datum type. |
20 | -- The datums are normally faces or edges. |
21 | uses Shape from TopoDS, |
22 | Presentation from Prs3d, |
23 | PresentationManager3d from PrsMgr, |
24 | Selection from SelectMgr, |
25 | Pnt from gp, |
26 | Dir from gp, |
27 | Projector from Prs3d, |
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28 | Transformation from Geom, |
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29 | Plane from Geom |
30 | |
31 | is |
32 | Create (aFShape : Shape from TopoDS; |
33 | aSShape : Shape from TopoDS; |
34 | aPlane : Plane from Geom; |
35 | anExternRef : Integer from Standard = 0) |
36 | ---Purpose: TwoFacesTangent or TwoEdgesTangent relation |
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37 | returns TangentRelation from AIS; |
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38 | ---Purpose: Constructs an object to display tangency constraints. |
39 | -- This object is defined by the first shape aFShape, the |
40 | -- second shape aSShape, the plane aPlane and the index anExternRef. |
41 | -- aPlane serves as an optional axis. |
42 | -- anExternRef set to 0 indicates that there is no relation. |
43 | |
44 | ExternRef(me: mutable) returns Integer from Standard |
45 | is static; |
46 | ---Purpose: Returns the external reference for tangency. |
47 | -- The values are as follows: |
48 | -- - 0 - there is no connection; |
49 | -- - 1 - there is a connection to the first shape; |
50 | -- - 2 - there is a connection to the second shape. |
51 | -- This reference is defined at construction time. |
52 | |
53 | SetExternRef(me: mutable;aRef : Integer from Standard) |
54 | is static; |
55 | ---Purpose: Sets the external reference for tangency, aRef. |
56 | -- The values are as follows: |
57 | -- - 0 - there is no connection; |
58 | -- - 1 - there is a connection to the first shape; |
59 | -- - 2 - there is a connection to the second shape. |
60 | -- This reference is initially defined at construction time. |
61 | |
62 | Compute(me : mutable; |
63 | aPresentationManager: PresentationManager3d from PrsMgr; |
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64 | aPresentation : Presentation from Prs3d; |
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65 | aMode : Integer from Standard= 0) |
66 | is redefined static private; |
67 | |
68 | Compute(me:mutable; |
69 | aProjector: Projector from Prs3d; |
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70 | aPresentation: Presentation from Prs3d) |
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71 | is redefined static private; |
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72 | |
73 | Compute(me : mutable; |
74 | aProjector : Projector from Prs3d; |
75 | aTrsf : Transformation from Geom; |
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76 | aPresentation : Presentation from Prs3d) |
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77 | is redefined; |
78 | ---Purpose: computes the presentation according to a point of view |
79 | -- given by <aProjector>. |
80 | -- To be Used when the associated degenerated Presentations |
81 | -- have been transformed by <aTrsf> which is not a Pure |
82 | -- Translation. The HLR Prs can't be deducted automatically |
83 | -- WARNING :<aTrsf> must be applied |
84 | -- to the object to display before computation !!! |
85 | |
86 | -- Methods from SelectableObject |
87 | |
88 | ComputeSelection(me : mutable; |
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89 | aSelection : Selection from SelectMgr; |
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90 | aMode : Integer from Standard)is private; |
91 | |
92 | |
93 | -- |
94 | -- Computation private methods |
95 | -- |
96 | |
97 | ComputeTwoFacesTangent(me: mutable; |
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98 | aPresentation : Presentation from Prs3d) |
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99 | is private; |
100 | |
101 | ComputeTwoEdgesTangent(me: mutable; |
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102 | aPresentation : Presentation from Prs3d) |
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103 | is private; |
104 | |
105 | |
106 | fields |
107 | |
108 | myAttach : Pnt from gp; |
109 | myDir : Dir from gp; |
110 | myLength : Real from Standard; |
111 | myExternRef : Integer from Standard; ---purpose: (0 no attachment,1 attachment with first shape, 2 attachment with second shape) |
112 | |
113 | end TangentRelation; |
114 | |