1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
-- File: BRepFeat_SplitShape.cdl
-- Created: Mon Sep 4 09:48:52 1995
-- Author: Jacques GOUSSARD
-- <jag@bravox>
---Copyright: Matra Datavision 1995
class SplitShape from BRepFeat inherits MakeShape from BRepBuilderAPI
---Purpose: One of the most significant aspects of BRepFeat functionality is the use of local
-- operations as opposed to global ones. In a global operation, you would first construct a
-- form of the type you wanted in your final feature, and then remove matter so that it could
-- fit into your initial basis object. In a local operation, however, you specify the domain of
-- the feature construction with aspects of the shape on which the feature is being created.
-- These semantics are expressed in terms of a member shape of the basis shape from which -
-- or up to which - matter will be added or removed. As a result, local operations make
-- calculations simpler and faster than global operations.
-- In BRepFeat, the semantics of local operations define features constructed from a contour or a
-- part of the basis shape referred to as the tool. In a SplitShape object, wires or edges of a
-- face in the basis shape to be used as a part of the feature are cut out and projected to a plane
-- outside or inside the basis shape. By rebuilding the initial shape incorporating the edges and
-- the faces of the tool, protrusion or depression features can be constructed.
uses Spliter from LocOpe,
WiresOnShape from LocOpe,
Shape from TopoDS,
Face from TopoDS,
Wire from TopoDS,
Edge from TopoDS,
Vertex from TopoDS,
ListOfShape from TopTools,
ShapeModification from BRepBuilderAPI
raises NotDone from StdFail,
ConstructionError from Standard,
NoSuchObject from Standard
is
Create
---Purpose: Empty constructor
returns SplitShape from BRepFeat;
---C++: inline
Create(S: Shape from TopoDS)
---Purpose: Creates the process with the shape <S>.
returns SplitShape from BRepFeat;
---C++: inline
Init(me: in out; S: Shape from TopoDS)
---Purpose: Initializes the process on the shape <S>.
---C++: inline
is static;
Add(me: in out; W: Wire from TopoDS;
F: Face from TopoDS)
---Purpose: Adds the wire <W> on the face <F>.
-- Raises NoSuchObject if <F> does not belong to the original shape.
---C++: inline
raises NoSuchObject from Standard,
ConstructionError from Standard
is static;
Add(me: in out; E: Edge from TopoDS;
F: Face from TopoDS)
---Purpose: Adds the edge <E> on the face <F>.
---C++: inline
raises NoSuchObject from Standard,
-- if <F> does not belong to the original shape.
ConstructionError from Standard
is static;
Add(me: in out; E : Edge from TopoDS;
EOn: Edge from TopoDS)
---Purpose: Adds the edge <E> on the existing edge <EOn>.
---C++: inline
raises NoSuchObject from Standard,
-- if <EOn> does not belong to the original shape.
ConstructionError from Standard
is static;
DirectLeft(me)
---Purpose: Returns the faces which are the left of the
-- projected wires.
returns ListOfShape from TopTools
---C++: return const&
raises NotDone from StdFail
--- The exception is raised when IsDone returns <Standard_False>.
is static;
Left(me)
---Purpose: Returns the faces of the "left" part on the shape.
-- (It is build from DirectLeft, with the faces
-- connected to this set, and so on...).
-- Raises NotDone if IsDone returns <Standard_False>.
---C++: return const&
returns ListOfShape from TopTools
raises NotDone from StdFail
is static;
--- Methods inherited from MakeShape, that must be redefined.
Build(me: in out)
is redefined static;
--- Purpose: Builds the cut and the resulting faces and edges as well.
IsDeleted (me: in out; S : Shape from TopoDS)
returns Boolean
is redefined;
---Purpose: Returns true if the shape has been deleted.
Modified(me: in out; F: Shape from TopoDS)
---Purpose: Returns the list of generated Faces.
---C++: return const &
returns ListOfShape from TopTools
is redefined static;
fields
mySShape : Spliter from LocOpe;
myWOnShape : WiresOnShape from LocOpe;
end SplitShape;
|
