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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
-- File: BRepBuilderAPI_MakeWire.cdl
-- Created: Thu Jul 8 11:15:02 1993
-- Author: Remi LEQUETTE
-- <rle@phylox>
---Copyright: Matra Datavision 1993
class MakeWire from BRepBuilderAPI inherits MakeShape from BRepBuilderAPI
---Purpose: Describes functions to build wires from edges. A wire can
-- be built from any number of edges.
-- To build a wire you first initialize the construction, then
-- add edges in sequence. An unlimited number of edges
-- can be added. The initialization of construction is done with:
-- - no edge (an empty wire), or
-- - edges of an existing wire, or
-- - up to four connectable edges.
-- In order to be added to a wire under construction, an
-- edge (unless it is the first one) must satisfy the following
-- condition: one of its vertices must be geometrically
-- coincident with one of the vertices of the wire (provided
-- that the highest tolerance factor is assigned to the two
-- vertices). It could also be the same vertex.
-- - The given edge is shared by the wire if it contains:
-- - two vertices, identical to two vertices of the wire
-- under construction (a general case of the wire closure), or
-- - one vertex, identical to a vertex of the wire under
-- construction; the other vertex not being
-- geometrically coincident with another vertex of the wire.
-- - In other cases, when one of the vertices of the edge
-- is simply geometrically coincident with a vertex of the
-- wire under construction (provided that the highest
-- tolerance factor is assigned to the two vertices), the
-- given edge is first copied and the coincident vertex is
-- replaced in this new edge, by the coincident vertex of the wire.
-- Note: it is possible to build non manifold wires using this construction tool.
-- A MakeWire object provides a framework for:
-- - initializing the construction of a wire,
-- - adding edges to the wire under construction, and
-- - consulting the result.
uses
Vertex from TopoDS,
Edge from TopoDS,
Wire from TopoDS,
ListOfShape from TopTools,
WireError from BRepBuilderAPI,
MakeWire from BRepLib
raises
NotDone from StdFail
is
Create
---Purpose: Constructs an empty wire framework, to which edges
-- are added using the Add function.
-- As soon as the wire contains one edge, it can return
-- with the use of the function Wire.
-- Warning
-- The function Error will return
-- BRepBuilderAPI_EmptyWire if it is called before at
-- least one edge is added to the wire under construction.
returns MakeWire from BRepBuilderAPI;
----------------------------------------------
-- From edges
----------------------------------------------
Create(E : Edge from TopoDS)
---Purpose: Make a Wire from an edge.
---Level: Public
returns MakeWire from BRepBuilderAPI;
Create(E1,E2 : Edge from TopoDS)
---Purpose: Make a Wire from two edges.
---Level: Public
returns MakeWire from BRepBuilderAPI;
Create(E1,E2,E3 : Edge from TopoDS)
---Purpose: Make a Wire from three edges.
---Level: Public
returns MakeWire from BRepBuilderAPI;
Create(E1,E2,E3,E4 : Edge from TopoDS)
---Purpose: Make a Wire from four edges.
---Level: Public
returns MakeWire from BRepBuilderAPI;
---Purpose: Constructs a wire
-- - from the TopoDS_Wire W composed of the edge E, or
-- - from edge E, or
-- - from two edges E1 and E2, or
-- - from three edges E1, E2 and E3, or
-- - from four edges E1, E2, E3 and E4.
-- Further edges can be added using the function Add.
-- Given edges are added in a sequence. Each of them
-- must be connectable to the wire under construction,
-- and so must satisfy the following condition (unless it is
-- the first edge of the wire): one of its vertices must be
-- geometrically coincident with one of the vertices of the
-- wire (provided that the highest tolerance factor is
-- assigned to the two vertices). It could also be the same vertex.
-- Warning
-- If an edge is not connectable to the wire under
-- construction it is not added. The function Error will
-- return BRepBuilderAPI_DisconnectedWire, the
-- function IsDone will return false and the function Wire
-- will raise an error, until a new connectable edge is added.
----------------------------------------------
-- From wire and edge
----------------------------------------------
Create(W : Wire from TopoDS)
---Purpose: Make a Wire from a Wire. Usefull for adding later.
---Level: Public
returns MakeWire from BRepBuilderAPI;
Create(W : Wire from TopoDS; E : Edge from TopoDS)
---Purpose: Add an edge to a wire.
---Level: Public
returns MakeWire from BRepBuilderAPI;
----------------------------------------------
-- Auxiliary methods
----------------------------------------------
Add(me : in out; E : Edge from TopoDS)
---Purpose: Adds the edge E to the wire under construction.
-- E must be connectable to the wire under construction, and, unless it
-- is the first edge of the wire, must satisfy the following
-- condition: one of its vertices must be geometrically coincident
-- with one of the vertices of the wire (provided that the highest
-- tolerance factor is assigned to the two vertices). It could also
-- be the same vertex.
-- Warning
-- If E is not connectable to the wire under construction it is not
-- added. The function Error will return
-- BRepBuilderAPI_DisconnectedWire, the function IsDone will return
-- false and the function Wire will raise an error, until a new
-- connectable edge is added.
is static;
Add(me : in out; W : Wire from TopoDS)
---Purpose: Add the edges of <W> to the current wire.
---Level: Public
is static;
Add(me : in out; L : ListOfShape from TopTools)
---Purpose: Adds the edges of <L> to the current wire. The
-- edges are not to be consecutive. But they are to
-- be all connected geometrically or topologically.
-- If some of them are not connected the Status give
-- DisconnectedWire but the "Maker" is Done() and you
-- can get the partial result. (ie connected to the
-- first edgeof the list <L>)
is static;
----------------------------------------------
-- Results
----------------------------------------------
IsDone(me) returns Boolean
---Purpose: Returns true if this algorithm contains a valid wire.
-- IsDone returns false if:
-- - there are no edges in the wire, or
-- - the last edge which you tried to add was not connectable.
is redefined;
Error(me) returns WireError from BRepBuilderAPI
---Purpose: Returns the construction status
-- - BRepBuilderAPI_WireDone if the wire is built, or
-- - another value of the BRepBuilderAPI_WireError
-- enumeration indicating why the construction failed.
is static;
Wire(me) returns Wire from TopoDS
---Purpose: Returns the constructed wire; or the part of the wire
-- under construction already built.
-- Exceptions StdFail_NotDone if a wire is not built.
---C++: return const &
---C++: alias "Standard_EXPORT operator TopoDS_Wire() const;"
raises
NotDone from StdFail
is static;
Edge(me) returns Edge from TopoDS
---C++: return const &
---Purpose: Returns the last edge added to the wire under construction.
-- Warning
-- - This edge can be different from the original one (the
-- argument of the function Add, for instance,)
-- - A null edge is returned if there are no edges in the
-- wire under construction, or if the last edge which you
-- tried to add was not connectable..
raises
NotDone from StdFail
is static;
Vertex(me) returns Vertex from TopoDS
---C++: return const &
---Purpose: Returns the last vertex of the last edge added to the
-- wire under construction.
-- Warning
-- A null vertex is returned if there are no edges in the wire
-- under construction, or if the last edge which you tried to
-- add was not connectableR
raises
NotDone from StdFail
is static;
fields
myMakeWire : MakeWire from BRepLib;
end MakeWire;
|
