b311480e |
1 | // Copyright (c) 1998-1999 Matra Datavision |
973c2be1 |
2 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
b311480e |
3 | // |
973c2be1 |
4 | // This file is part of Open CASCADE Technology software library. |
b311480e |
5 | // |
d5f74e42 |
6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
973c2be1 |
8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
10 | // distribution for complete text of the license and disclaimer of any warranty. |
b311480e |
11 | // |
973c2be1 |
12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
b311480e |
14 | |
7fd59977 |
15 | |
42cf5bc1 |
16 | #include <Bnd_Box.hxx> |
17 | #include <BRep_Builder.hxx> |
18 | #include <BRep_Tool.hxx> |
7dfac274 |
19 | #include <BRepAlgoAPI_Section.hxx> |
7fd59977 |
20 | #include <BRepBndLib.hxx> |
42cf5bc1 |
21 | #include <BRepFill_Generator.hxx> |
7fd59977 |
22 | #include <BRepLib_MakeEdge.hxx> |
42cf5bc1 |
23 | #include <BRepLib_MakeVertex.hxx> |
7fd59977 |
24 | #include <BRepLib_MakeWire.hxx> |
42cf5bc1 |
25 | #include <BRepProj_Projection.hxx> |
7fd59977 |
26 | #include <BRepSweep_Prism.hxx> |
42cf5bc1 |
27 | #include <BRepTools_Modifier.hxx> |
28 | #include <BRepTools_TrsfModification.hxx> |
7fd59977 |
29 | #include <gp_Dir.hxx> |
30 | #include <gp_Pnt.hxx> |
7fd59977 |
31 | #include <gp_Trsf.hxx> |
42cf5bc1 |
32 | #include <gp_Vec.hxx> |
33 | #include <Precision.hxx> |
34 | #include <ShapeAnalysis_FreeBounds.hxx> |
35 | #include <Standard_ConstructionError.hxx> |
36 | #include <Standard_NoSuchObject.hxx> |
37 | #include <Standard_NullObject.hxx> |
38 | #include <TopExp.hxx> |
39 | #include <TopExp_Explorer.hxx> |
40 | #include <TopLoc_Location.hxx> |
7fd59977 |
41 | #include <TopoDS.hxx> |
42 | #include <TopoDS_Iterator.hxx> |
43 | #include <TopoDS_Shape.hxx> |
7fd59977 |
44 | #include <TopTools_ListIteratorOfListOfShape.hxx> |
42cf5bc1 |
45 | #include <TopTools_ListOfShape.hxx> |
7fd59977 |
46 | |
47 | //======================================================================= |
48 | //function : DistanceOut |
49 | //purpose : Compute the minimum distance between input shapes |
50 | // (using Bounding Boxes of each Shape) |
51 | //======================================================================= |
7fd59977 |
52 | static Standard_Real DistanceOut (const TopoDS_Shape& S1, const TopoDS_Shape& S2) |
53 | { |
54 | Bnd_Box BBox1, BBox2; |
55 | BRepBndLib::Add(S1,BBox1); |
56 | BRepBndLib::Add(S2,BBox2); |
57 | return BBox1.Distance(BBox2); |
58 | } |
59 | |
60 | //======================================================================= |
61 | //function : DistanceIn |
62 | //purpose : Compute the maximum distance between input Shapes |
63 | // we compute the maximum dimension of each Bounding Box and then |
64 | // add each other with the minimum distance of shapes. |
65 | //======================================================================= |
66 | |
67 | static Standard_Real DistanceIn (const TopoDS_Shape& S1, const TopoDS_Shape& S2) |
68 | { |
69 | Bnd_Box LBBox,SBBox; |
70 | BRepBndLib::Add(S1,SBBox); |
71 | BRepBndLib::Add(S2,LBBox); |
72 | |
73 | Standard_Real LXmin, LYmin, LZmin, LXmax, LYmax, LZmax, |
74 | SXmin, SYmin, SZmin, SXmax, SYmax, SZmax; |
75 | SBBox.Get(SXmin, SYmin, SZmin, |
76 | SXmax, SYmax, SZmax); |
77 | LBBox.Get(LXmin, LYmin, LZmin, |
78 | LXmax, LYmax, LZmax); |
79 | |
80 | //Compute the max distance between input shapes------------// |
81 | gp_XYZ Lmin(LXmin, LYmin, LZmin), |
82 | Lmax(LXmax, LYmax, LZmax); |
83 | gp_XYZ Smin(SXmin, SYmin, SZmin), |
84 | Smax(SXmax, SYmax, SZmax); |
85 | Lmax.Subtract(Lmin); |
86 | Smax.Subtract(Smin); |
87 | return Lmax.Modulus() + Smax.Modulus() + DistanceOut(S1, S2); |
88 | } |
89 | |
90 | //======================================================================= |
91 | //function : BuildSection |
92 | //purpose : Cuts theShape by theTool using BRepAlgoAPI_Section and |
93 | // stores result as set of connected wires and compound |
94 | //======================================================================= |
95 | |
96 | void BRepProj_Projection::BuildSection (const TopoDS_Shape& theShape, |
97 | const TopoDS_Shape& theTool) |
98 | { |
99 | myIsDone = Standard_False; |
100 | mySection.Nullify(); |
101 | myShape.Nullify(); |
102 | myItr = 0; |
103 | |
104 | // if theShape is compound, extract only faces -- section algorithm |
105 | // may refuse to work if e.g. vertex is present |
106 | TopoDS_Shape aShape; |
107 | if (theShape.ShapeType() == TopAbs_FACE || |
108 | theShape.ShapeType() == TopAbs_SHELL || |
109 | theShape.ShapeType() == TopAbs_SOLID || |
110 | theShape.ShapeType() == TopAbs_COMPSOLID) |
111 | aShape = theShape; |
112 | else if (theShape.ShapeType() == TopAbs_COMPOUND) |
113 | { |
114 | TopoDS_Compound C; |
115 | BRep_Builder B; |
116 | TopExp_Explorer exp (theShape, TopAbs_FACE); |
117 | for (; exp.More(); exp.Next()) |
118 | { |
119 | if ( C.IsNull() ) |
120 | B.MakeCompound (C); |
121 | B.Add (C, exp.Current()); |
122 | } |
123 | aShape = C; |
124 | } |
125 | if ( aShape.IsNull() ) |
126 | Standard_ConstructionError::Raise(__FILE__": target shape has no faces"); |
127 | |
128 | // build section computing pcurves on the shape |
7dfac274 |
129 | BRepAlgoAPI_Section aSectionTool (aShape, theTool, Standard_False); |
7fd59977 |
130 | aSectionTool.Approximation (Standard_True); |
131 | aSectionTool.ComputePCurveOn1 (Standard_True); |
132 | aSectionTool.Build(); |
133 | |
134 | // check for successful work of the section tool |
135 | if (! aSectionTool.IsDone()) |
136 | return; |
137 | |
138 | // get edges of the result |
139 | Handle(TopTools_HSequenceOfShape) anEdges = new TopTools_HSequenceOfShape; |
140 | TopExp_Explorer exp(aSectionTool.Shape(), TopAbs_EDGE); |
141 | for (; exp.More(); exp.Next()) |
142 | anEdges->Append (exp.Current()); |
143 | |
144 | // if no edges are found, this means that this section yields no result |
145 | if (anEdges->Length() <= 0) |
146 | return; |
147 | |
148 | // connect edges to wires using ShapeAnalysis functionality |
149 | ShapeAnalysis_FreeBounds::ConnectEdgesToWires (anEdges, Precision::Confusion(), |
150 | Standard_True, mySection); |
151 | myIsDone = (! mySection.IsNull() && mySection->Length() > 0); |
152 | |
153 | // collect all resulting wires to compound |
154 | if ( myIsDone ) |
155 | { |
156 | BRep_Builder B; |
157 | B.MakeCompound (myShape); |
158 | for (Standard_Integer i=1; i <= mySection->Length(); i++) |
159 | B.Add (myShape, mySection->Value(i)); |
160 | |
161 | // initialize iteration (for compatibility with previous versions) |
162 | myItr = 1; |
163 | } |
164 | } |
165 | |
166 | //======================================================================= |
167 | //function : BRepProj_Projection |
168 | //purpose : Cylindrical Projection |
169 | //======================================================================= |
170 | |
171 | BRepProj_Projection::BRepProj_Projection(const TopoDS_Shape& Wire, |
172 | const TopoDS_Shape& Shape, |
173 | const gp_Dir& D) |
174 | : myIsDone(Standard_False), myItr(0) |
175 | { |
176 | // Check the input |
177 | Standard_NullObject_Raise_if((Wire.IsNull() || Shape.IsNull()),__FILE__": null input shape"); |
178 | if (Wire.ShapeType() != TopAbs_EDGE && |
179 | Wire.ShapeType() != TopAbs_WIRE ) |
180 | Standard_ConstructionError::Raise(__FILE__": projected shape is neither wire nor edge"); |
181 | |
182 | // compute the "length" of the cylindrical surface to build |
183 | Standard_Real mdis = DistanceIn(Wire, Shape); |
184 | gp_Vec Vsup (D.XYZ() * 2 * mdis); |
185 | gp_Vec Vinf (D.XYZ() * -mdis); |
186 | |
187 | // move the base of the cylindrical surface by translating it by -mdis |
188 | gp_Trsf T; |
189 | T.SetTranslation(Vinf); |
190 | // Note: it is necessary to create copy of wire to avoid adding new pcurves into it |
191 | Handle(BRepTools_TrsfModification) Trsf = new BRepTools_TrsfModification(T); |
192 | BRepTools_Modifier Modif (Wire, Trsf); |
193 | TopoDS_Shape WireBase = Modif.ModifiedShape(Wire); |
194 | |
195 | // Creation of a cylindrical surface |
196 | BRepSweep_Prism CylSurf (WireBase, Vsup, Standard_False); |
197 | |
198 | // Perform section |
199 | BuildSection (Shape, CylSurf.Shape()); |
200 | } |
201 | |
202 | //======================================================================= |
203 | //function : BRepProj_Projection |
204 | //purpose : Conical projection |
205 | //======================================================================= |
206 | |
207 | BRepProj_Projection::BRepProj_Projection (const TopoDS_Shape& Wire, |
208 | const TopoDS_Shape& Shape, |
209 | const gp_Pnt& P) |
210 | : myIsDone(Standard_False), myItr(0) |
211 | { |
212 | // Check the input |
213 | Standard_NullObject_Raise_if((Wire.IsNull() || Shape.IsNull()),__FILE__": null input shape"); |
214 | if (Wire.ShapeType() != TopAbs_EDGE && |
215 | Wire.ShapeType() != TopAbs_WIRE ) |
216 | Standard_ConstructionError::Raise(__FILE__": projected shape is neither wire nor edge"); |
217 | |
218 | // if Wire is only an edge, transform it into a Wire |
219 | TopoDS_Wire aWire; |
220 | if (Wire.ShapeType() == TopAbs_EDGE) |
221 | { |
222 | BRep_Builder BB; |
223 | BB.MakeWire(aWire); |
224 | BB.Add(aWire, Wire); |
225 | } |
226 | else |
227 | aWire = TopoDS::Wire(Wire); |
228 | |
229 | // compute the "length" of the conical surface to build |
230 | Standard_Real mdis = DistanceIn(Wire, Shape); |
231 | |
232 | // Initialize iterator to get first sub-shape of Wire |
233 | TopExp_Explorer ExpWire; |
234 | ExpWire.Init (aWire, TopAbs_VERTEX); |
235 | |
236 | // get the first Point of the first sub-shape os the Wire |
237 | gp_Pnt PC = BRep_Tool::Pnt(TopoDS::Vertex(ExpWire.Current())); |
238 | |
239 | // compute the ratio of the scale transformation |
240 | Standard_Real Scale = PC.Distance(P); |
241 | if ( Abs (Scale) < Precision::Confusion() ) |
242 | Standard_ConstructionError::Raise("Projection"); |
243 | Scale = 1. + mdis / Scale; |
244 | |
245 | // move the base of the conical surface by scaling it with ratio Scale |
7fd59977 |
246 | gp_Trsf T; |
247 | T.SetScale(P, Scale); |
248 | Handle(BRepTools_TrsfModification) Tsca = new BRepTools_TrsfModification(T); |
249 | BRepTools_Modifier ModifScale(aWire,Tsca); |
250 | TopoDS_Shape ShapeGen1 = ModifScale.ModifiedShape(aWire); |
251 | |
1f205411 |
252 | TopoDS_Vertex aVertex = BRepLib_MakeVertex(P); |
253 | TopoDS_Edge DegEdge; |
254 | BRep_Builder BB; |
255 | BB.MakeEdge( DegEdge ); |
256 | BB.Add( DegEdge, aVertex.Oriented(TopAbs_FORWARD) ); |
257 | BB.Add( DegEdge, aVertex.Oriented(TopAbs_REVERSED) ); |
258 | BB.Degenerated( DegEdge, Standard_True ); |
da72a17c |
259 | |
1f205411 |
260 | TopoDS_Wire DegWire; |
261 | BB.MakeWire( DegWire ); |
262 | BB.Add( DegWire, DegEdge ); |
263 | DegWire.Closed( Standard_True ); |
7fd59977 |
264 | |
265 | // Build the Ruled surface based shape |
266 | BRepFill_Generator RuledSurf; |
1f205411 |
267 | RuledSurf.AddWire(DegWire); |
7fd59977 |
268 | RuledSurf.AddWire(TopoDS::Wire(ShapeGen1)); |
7fd59977 |
269 | RuledSurf.Perform(); |
270 | TopoDS_Shell SurfShell = RuledSurf.Shell(); |
271 | |
272 | // Perform section |
273 | BuildSection (Shape, SurfShell); |
274 | } |