1 // Created on: 2017-04-21
2 // Created by: Alexander Bobkov
3 // Copyright (c) 2017 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _BRepTools_History_HeaderFile
17 #define _BRepTools_History_HeaderFile
19 #include <NCollection_Handle.hxx>
21 #include <TopTools_DataMapOfShapeListOfShape.hxx>
22 #include <TopTools_MapOfShape.hxx>
24 class BRepTools_History;
25 DEFINE_STANDARD_HANDLE(BRepTools_History, Standard_Transient)
27 //! The history keeps the following relations between the input shapes
28 //! (S1, ..., Sm) and output shapes (T1, ..., Tn):
29 //! 1) an output shape Tj is generated from an input shape Si: Tj <= G(Si);
30 //! 2) a output shape Tj is modified from an input shape Si: Tj <= M(Si);
31 //! 3) an input shape (Si) is removed: R(Si) == 1.
33 //! The relations are kept only for shapes of types vertex, edge, face, and
36 //! The last relation means that:
37 //! 1) shape Si is not an output shape and
38 //! 2) no any shape is modified (produced) from shape Si:
39 //! R(Si) == 1 ==> Si != Tj, M(Si) == 0.
41 //! It means that the input shape cannot be removed and modified
42 //! simultaneously. However, the shapes may be generated from the
43 //! removed shape. For instance, in Fillet operation the edges
44 //! generate faces and then are removed.
46 //! No any shape could be generated and modified from the same shape
47 //! simultaneously: sets G(Si) and M(Si) are not intersected
48 //! (G(Si) ^ M(Si) == 0).
50 //! Each output shape should be:
51 //! 1) an input shape or
52 //! 2) generated or modified from an input shape (even generated from the
53 //! implicit null shape if necessary):
54 //! Tj == Si V (exists Si that Tj <= G(Si) U M(Si)).
56 //! Recommendations to choose between relations 'generated' and 'modified':
57 //! 1) a shape is generated from input shapes if it dimension is greater or
58 //! smaller than the dimensions of the input shapes;
59 //! 2) a shape is generated from input shapes if these shapes are also output
61 //! 3) a shape is generated from input shapes of the same dimension if it is
62 //! produced by joining shapes generated from these shapes;
63 //! 4) a shape is modified from an input shape if it replaces the input shape by
64 //! changes of the location, the tolerance, the bounds of the parametric
65 //! space (the faces for a solid), the parametrization and/or by applying of
67 //! 5) a shape is modified from input shapes of the same dimension if it is
68 //! produced by joining shapes modified from these shapes.
70 //! Two sequential histories:
71 //! - one history (H12) of shapes S1, ..., Sm to shapes T1, ..., Tn and
72 //! - another history (H23) of shapes T1, ..., Tn to shapes Q1, ..., Ql
73 //! could be merged to the single history (H13) of shapes S1, ..., Sm to shapes
77 //! 1) if shape Tj is generated from shape Si then each shape generated or
78 //! modified from shape Tj is considered as a shape generated from shape Si
79 //! among shapes Q1, ..., Ql:
80 //! Tj <= G12(Si), Qk <= G23(Tj) U M23(Tj) ==> Qk <= G13(Si).
81 //! 2) if shape Tj is modified from shape Si, shape Qk is generated from shape
82 //! Tj then shape Qk is considered as a shape generated from shape Si among
83 //! shapes Q1, ..., Ql:
84 //! Tj <= M12(Si), Qk <= G23(Tj) ==> Qk <= G13(Si);
85 //! 3) if shape Tj is modified from shape Si, shape Qk is modified from shape
86 //! Tj then shape Qk is considered as a shape modified from shape Si among
87 //! shapes Q1, ..., Ql:
88 //! Tj <= M12(Si), Qk <= M23(Tj) ==> Qk <= M13(Si);
89 class BRepTools_History: public Standard_Transient
91 public: //! @name Constructors for History creation
94 BRepTools_History() {}
96 //! Template constructor for History creation from the algorithm having
97 //! standard history methods such as IsDeleted(), Modified() and Generated().
98 //! @param theArguments [in] Arguments of the algorithm;
99 //! @param theAlgo [in] The algorithm.
100 template <class TheAlgo>
101 BRepTools_History(const TopTools_ListOfShape& theArguments,
104 // Map all argument shapes to save them in history
105 TopTools_IndexedMapOfShape anArgsMap;
106 TopTools_ListIteratorOfListOfShape aIt(theArguments);
107 for (; aIt.More(); aIt.Next())
109 if (!aIt.Value().IsNull())
110 TopExp::MapShapes(aIt.Value(), anArgsMap);
113 // Copy the history for all supported shapes from the algorithm
114 Standard_Integer i, aNb = anArgsMap.Extent();
115 for (i = 1; i <= aNb; ++i)
117 const TopoDS_Shape& aS = anArgsMap(i);
118 if (!IsSupportedType(aS))
121 if (theAlgo.IsDeleted(aS))
125 const TopTools_ListOfShape& aModified = theAlgo.Modified(aS);
126 for (aIt.Initialize(aModified); aIt.More(); aIt.Next())
127 AddModified(aS, aIt.Value());
130 const TopTools_ListOfShape& aGenerated = theAlgo.Generated(aS);
131 for (aIt.Initialize(aGenerated); aIt.More(); aIt.Next())
132 AddGenerated(aS, aIt.Value());
138 //! The types of the historical relations.
141 TRelationType_Removed,
142 TRelationType_Generated,
143 TRelationType_Modified
148 //! Returns 'true' if the type of the shape is supported by the history.
149 static Standard_Boolean IsSupportedType(const TopoDS_Shape& theShape)
151 const TopAbs_ShapeEnum aType = theShape.ShapeType();
152 return aType == TopAbs_VERTEX || aType == TopAbs_EDGE ||
153 aType == TopAbs_FACE || aType == TopAbs_SOLID;
156 public: //! Methods to set the history.
158 //! Set the second shape as generated one from the first shape.
159 Standard_EXPORT void AddGenerated(
160 const TopoDS_Shape& theInitial, const TopoDS_Shape& theGenerated);
162 //! Set the second shape as modified one from the first shape.
163 Standard_EXPORT void AddModified(
164 const TopoDS_Shape& theInitial, const TopoDS_Shape& theModified);
166 //! Set the shape as removed one.
167 Standard_EXPORT void Remove(const TopoDS_Shape& theRemoved);
169 //! Set the second shape as the only generated one from the first one.
170 Standard_EXPORT void ReplaceGenerated(
171 const TopoDS_Shape& theInitial, const TopoDS_Shape& theGenerated);
173 //! Set the second shape as the only modified one from the first one.
174 Standard_EXPORT void ReplaceModified(
175 const TopoDS_Shape& theInitial, const TopoDS_Shape& theModified);
177 //! Clears the history.
180 myShapeToModified.Clear();
181 myShapeToGenerated.Clear();
185 public: //! Methods to read the history.
187 //! Returns all shapes generated from the shape.
189 const TopTools_ListOfShape& Generated(const TopoDS_Shape& theInitial) const;
191 //! Returns all shapes modified from the shape.
193 const TopTools_ListOfShape& Modified(const TopoDS_Shape& theInitial) const;
195 //! Returns 'true' if the shape is removed.
197 Standard_Boolean IsRemoved(const TopoDS_Shape& theInitial) const;
199 //! Returns 'true' if there any shapes with Generated elements present
200 Standard_Boolean HasGenerated() const { return !myShapeToGenerated.IsEmpty(); }
202 //! Returns 'true' if there any Modified shapes present
203 Standard_Boolean HasModified() const { return !myShapeToModified.IsEmpty(); }
205 //! Returns 'true' if there any removed shapes present
206 Standard_Boolean HasRemoved() const { return !myRemoved.IsEmpty(); }
208 public: //! A method to merge a next history to this history.
210 //! Merges the next history to this history.
211 Standard_EXPORT void Merge(const Handle(BRepTools_History)& theHistory23);
213 //! Merges the next history to this history.
214 Standard_EXPORT void Merge(const BRepTools_History& theHistory23);
216 //! Template method for merging history of the algorithm having standard
217 //! history methods such as IsDeleted(), Modified() and Generated()
218 //! into current history object.
219 //! @param theArguments [in] Arguments of the algorithm;
220 //! @param theAlgo [in] The algorithm.
221 template<class TheAlgo>
222 void Merge(const TopTools_ListOfShape& theArguments,
225 // Create new history object from the given algorithm and merge it into this.
226 Merge(BRepTools_History(theArguments, theAlgo));
229 public: //! A method to dump a history
231 //! Prints the brief description of the history into a stream
232 void Dump(Standard_OStream& theS)
234 theS << "History contains:\n";
235 theS << " - " << myRemoved.Extent() << " Deleted shapes;\n";
236 theS << " - " << myShapeToModified.Extent() << " Modified shapes;\n";
237 theS << " - " << myShapeToGenerated.Extent() << " Generated shapes.\n";
242 //! Define the OCCT RTTI for the type.
243 DEFINE_STANDARD_RTTIEXT(BRepTools_History, Standard_Transient)
246 //! Prepares the shapes generated from the first shape to set the second one
247 //! as generated one from the first one by the addition or the replacement.
248 //! Returns 'true' on success.
249 Standard_Boolean prepareGenerated(
250 const TopoDS_Shape& theInitial, const TopoDS_Shape& theGenerated);
252 //! Prepares the shapes modified from the first shape to set the second one
253 //! as modified one from the first one by the addition or the replacement.
254 //! Returns 'true' on success.
255 Standard_Boolean prepareModified(
256 const TopoDS_Shape& theInitial, const TopoDS_Shape& theModified);
258 private: //! Data to keep the history.
260 //! Maps each input shape to all shapes modified from it.
261 //! If an input shape is not bound to the map then
262 //! there is no shapes modified from the shape.
263 //! No any shape should be mapped to an empty list.
264 TopTools_DataMapOfShapeListOfShape myShapeToModified;
266 //! Maps each input shape to all shapes generated from it.
267 //! If an input shape is not bound to the map then
268 //! there is no shapes generated from the shape.
269 //! No any shape should be mapped to an empty list.
270 TopTools_DataMapOfShapeListOfShape myShapeToGenerated;
272 TopTools_MapOfShape myRemoved; //!< The removed shapes.
274 private: //! Auxiliary members to read the history.
276 //! An auxiliary empty list.
277 static const TopTools_ListOfShape myEmptyList;
279 //! A method to export the auxiliary list.
280 Standard_EXPORT static const TopTools_ListOfShape& emptyList();
284 //! Auxiliary messages.
285 static const char* myMsgUnsupportedType;
286 static const char* myMsgGeneratedAndRemoved;
287 static const char* myMsgModifiedAndRemoved;
288 static const char* myMsgGeneratedAndModified;
291 #endif // _BRepTools_History_HeaderFile