1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
3 // File: GeomAlgoAPI_SketchBuilder.cpp
4 // Created: 02 Jun 2014
5 // Author: Artem ZHIDKOV
7 #include <GeomAlgoAPI_SketchBuilder.h>
8 #include <GeomAPI_PlanarEdges.h>
15 #include <BOPAlgo_Builder.hxx>
16 #include <BOPAlgo_Operation.hxx>
17 #include <BOPAlgo_PaveFiller.hxx>
18 #include <BOPTools.hxx>
19 #include <BRep_Builder.hxx>
20 #include <BRep_Curve3D.hxx>
21 #include <BRep_Tool.hxx>
22 #include <BRepAlgoAPI_Cut.hxx>
23 #include <BRepBuilderAPI_MakeFace.hxx>
24 #include <BRepClass_FaceClassifier.hxx>
25 #include <Geom_Curve.hxx>
26 #include <Geom_Plane.hxx>
28 #include <TopExp_Explorer.hxx>
29 #include <TopoDS_Edge.hxx>
30 #include <TopoDS_Face.hxx>
31 #include <TopoDS_Vertex.hxx>
32 #include <TopoDS_Wire.hxx>
34 #include <Precision.hxx>
39 #define DBL_MAX 1.7976931348623158e+308
42 const double tolerance = Precision::Confusion();
43 // This value helps to find direction on the boundaries of curve.
44 // It is not significant for lines, but is used for circles to avoid
45 // wrong directions of movement (when two edges are tangent on the certain vertex)
46 const double shift = acos(1.0 - 3.0 * tolerance);
48 /// \brief Search first vertex - the vertex with lowest x coordinate, which is used in 2 edges at least
49 static const TopoDS_Vertex& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
50 const gp_Dir& theDirX, const gp_Dir& theDirY);
52 /// \brief Search the vertex on the sketch candidate to be the next one in the loop
53 static void findNextVertex(const TopoDS_Vertex& theStartVertex,
54 const BOPCol_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap,
55 const gp_Dir& theStartDir, const gp_Dir& theNormal,
56 TopoDS_Vertex& theNextVertex, TopoDS_Edge& theNextEdge,
59 /// \brief Create planar face using the edges surrounding it
60 static void createFace(const TopoDS_Vertex& theStartVertex,
61 const std::list<TopoDS_Edge>::iterator& theStartEdge,
62 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
63 const gp_Pln& thePlane, TopoDS_Face& theResFace);
65 /// \bief Create planar wire
66 static void createWireList(const TopoDS_Vertex& theStartVertex,
67 const std::list<TopoDS_Edge>::iterator& theStartEdge,
68 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
69 const std::set<TopoDS_Edge*>& theEdgesInLoops,
70 std::list<TopoDS_Wire>& theResWires);
72 /// \brief Calculate outer tengency on the edge in specified vertex
73 static gp_Dir getOuterEdgeDirection(const TopoDS_Edge& theEdge, const TopoDS_Vertex& theVertex);
75 /// \brief Unnecessary edges will be removed from the map.
76 /// Positions of iterator will be updated
77 static void removeWasteEdges(std::list<TopoDS_Vertex>::iterator& theStartVertex,
78 std::list<TopoDS_Edge>::iterator& theStartEdge,
79 const std::list<TopoDS_Vertex>::iterator& theEndOfVertexes,
80 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
81 BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE);
84 void GeomAlgoAPI_SketchBuilder::createFaces(
85 const std::shared_ptr<GeomAPI_Pnt>& theOrigin,
86 const std::shared_ptr<GeomAPI_Dir>& theDirX,
87 const std::shared_ptr<GeomAPI_Dir>& theNorm,
88 const std::list<std::shared_ptr<GeomAPI_Shape> >& theFeatures,
89 std::list<std::shared_ptr<GeomAPI_Shape> >& theResultFaces,
90 std::list<std::shared_ptr<GeomAPI_Shape> >& theResultWires)
92 if (theFeatures.empty())
95 // Create the list of edges with shared vertexes
96 BOPAlgo_Builder aBuilder;
97 BOPAlgo_PaveFiller aPF;
98 TopoDS_Shape aFeaturesCompound;
100 // Obtain only edges from the features list
101 std::list<std::shared_ptr<GeomAPI_Shape> > anEdges;
102 std::list<std::shared_ptr<GeomAPI_Shape> >::const_iterator aFeatIt = theFeatures.begin();
103 for (; aFeatIt != theFeatures.end(); aFeatIt++) {
104 std::shared_ptr<GeomAPI_Shape> aShape(*aFeatIt);
105 const TopoDS_Edge& anEdge = aShape->impl<TopoDS_Edge>();
106 if (anEdge.ShapeType() == TopAbs_EDGE)
107 anEdges.push_back(aShape);
110 if (anEdges.size() == 1) { // If there is only one feature, BOPAlgo_Builder will decline to work. Need to process it anyway
111 aFeaturesCompound = anEdges.front()->impl<TopoDS_Shape>();
113 std::list<std::shared_ptr<GeomAPI_Shape> >::const_iterator anIt = anEdges.begin();
114 for (; anIt != anEdges.end(); anIt++) {
115 std::shared_ptr<GeomAPI_Shape> aPreview(*anIt);
116 aBuilder.AddArgument(aPreview->impl<TopoDS_Edge>());
118 aPF.SetArguments(aBuilder.Arguments());
120 int aErr = aPF.ErrorStatus();
123 aBuilder.PerformWithFiller(aPF);
124 aErr = aBuilder.ErrorStatus();
127 aFeaturesCompound = aBuilder.Shape();
130 BOPCol_IndexedDataMapOfShapeListOfShape aMapVE; // map between vertexes and edges
131 BOPTools::MapShapesAndAncestors(aFeaturesCompound, TopAbs_VERTEX, TopAbs_EDGE, aMapVE);
132 if (aMapVE.IsEmpty()) // in case of not-initialized circle
135 gp_Dir aDirX = theDirX->impl<gp_Dir>();
136 gp_Dir aNorm = theNorm->impl<gp_Dir>();
137 gp_Dir aDirY = aNorm.Crossed(aDirX);
139 gp_Pln aPlane(theOrigin->impl<gp_Pnt>(), aNorm);
141 // Set of edges used in loops
142 std::set<TopoDS_Edge*> anEdgesInLoops;
143 // Lists for processed vertexes and edges
144 std::list<TopoDS_Vertex> aProcVertexes;
145 std::list<TopoDS_Edge> aProcEdges;
147 // Search the start vertex
148 TopoDS_Vertex aStartVertex = findStartVertex(aMapVE, aDirX, aDirY);
149 aProcVertexes.push_back(aStartVertex);
151 TopoDS_Vertex aCurVertex = aStartVertex;
152 gp_Dir aCurDir = aDirY.Reversed();
153 gp_Dir aCurNorm = aNorm.Reversed();
155 // Go through the edges and find loops
156 TopoDS_Vertex aNextVertex;
157 TopoDS_Edge aBindingEdge;
159 while (aMapVE.Extent() > 0) {
160 if (aCurVertex.IsNull())
162 if (!aProcEdges.empty())
163 aBindingEdge = aProcEdges.back();
164 findNextVertex(aCurVertex, aMapVE, aCurDir, aCurNorm, aNextVertex, aBindingEdge, aNextDir);
167 // Try to find next vertex in the list of already processed
168 bool isLoopFound = false;
169 std::list<TopoDS_Vertex>::iterator aVertIter = aProcVertexes.begin();
170 std::list<TopoDS_Edge>::iterator anEdgeIter = aProcEdges.begin();
171 for (; aVertIter != aProcVertexes.end(); aVertIter++) {
172 if (aVertIter->IsSame(aNextVertex)) {
176 if (anEdgeIter != aProcEdges.end())
180 bool isCircleFound = (isLoopFound && anEdgeIter == aProcEdges.end());
181 aProcVertexes.push_back(aNextVertex);
182 aProcEdges.push_back(aBindingEdge);
185 // If the binding edge is a full circle, then it may be added recently. Need to update edge iterator
187 anEdgeIter = aProcEdges.end();
190 else if (aVertIter != aProcVertexes.begin()) {
191 // Check the orientation of the loop
192 gp_Dir aCN = getOuterEdgeDirection(*anEdgeIter, *aVertIter);
193 gp_Dir aCP = getOuterEdgeDirection(aProcEdges.back(), *aVertIter);
196 if (aCN.DotCross(aCP, aNorm) < -tolerance) {
197 // The found loop has wrong orientation and may contain sub-loops.
198 // Need to check it once again with another initial direction.
199 aCurVertex = *aVertIter;
201 aProcVertexes.pop_back();
202 aProcEdges.pop_back();
203 } while (aCurVertex != aProcVertexes.back());
204 aCurDir = aCN.Reversed();
205 aCurNorm = aNorm.Reversed();
210 if (!isCircleFound && anEdgeIter != aProcEdges.end() &&
211 anEdgeIter->IsSame(aProcEdges.back())) { // The loop on the same edge taken twice
212 aProcVertexes.pop_back();
213 aProcEdges.pop_back();
214 aCurVertex = aProcVertexes.back();
215 aCurDir = getOuterEdgeDirection(aProcEdges.back(), aCurVertex);
216 aCurNorm = aNorm.Reversed();
220 // When the orientation is correct or the edges looped through
221 // the first element, create new face and remove unnecessary edges.
223 createFace(*aVertIter, anEdgeIter, aProcEdges.end(), aPlane, aPatch);
224 if (!aPatch.IsNull()) {
225 std::shared_ptr<GeomAPI_Shape> aFace(new GeomAPI_Shape);
226 aFace->setImpl(new TopoDS_Face(aPatch));
227 theResultFaces.push_back(aFace);
229 // push the edges used in the loop to the map
230 std::list<TopoDS_Edge>::iterator anIter;
231 for (anIter = anEdgeIter; anIter != aProcEdges.end(); anIter++)
232 anEdgesInLoops.insert(&(*anIter));
233 // remove unnecessary edges
234 std::list<TopoDS_Vertex>::iterator aCopyVLoop = aVertIter;
235 std::list<TopoDS_Edge>::iterator aCopyELoop = anEdgeIter;
236 removeWasteEdges(aVertIter, anEdgeIter, aProcVertexes.end(), aProcEdges.end(), aMapVE);
238 // revert the list of remaining edges
239 std::list<TopoDS_Vertex> aRemainVertexes;
240 for (; aVertIter != aProcVertexes.end(); aVertIter++)
241 aRemainVertexes.push_front(*aVertIter);
242 std::list<TopoDS_Edge> aRemainEdges;
243 for (; anEdgeIter != aProcEdges.end(); anEdgeIter++)
244 aRemainEdges.push_front(*anEdgeIter);
245 // remove edges and vertexes used in the loop and add remaining ones
246 if (aCopyVLoop != aProcVertexes.begin()) {
247 aVertIter = aCopyVLoop;
250 aVertIter = aProcVertexes.end();
251 aProcVertexes.erase(aCopyVLoop, aProcVertexes.end());
252 aProcVertexes.insert(aProcVertexes.end(), aRemainVertexes.begin(), aRemainVertexes.end());
253 if (aCopyELoop != aProcEdges.begin()) {
254 anEdgeIter = aCopyELoop;
257 anEdgeIter = aProcEdges.end();
258 aProcEdges.erase(aCopyELoop, aProcEdges.end());
259 aProcEdges.insert(aProcEdges.end(), aRemainEdges.begin(), aRemainEdges.end());
261 if (aVertIter == aProcVertexes.end())
262 aVertIter = aProcVertexes.begin();
265 if (anEdgeIter == aProcEdges.end())
266 anEdgeIter = aProcEdges.begin();
269 aCopyVLoop = aVertIter;
270 aCopyELoop = anEdgeIter;
272 if (aVertIter != aProcVertexes.end() &&
273 aMapVE.Contains(*aVertIter) && aMapVE.FindFromKey(*aVertIter).Extent() <= 1)
274 removeWasteEdges(aVertIter, anEdgeIter, aProcVertexes.end(), aProcEdges.end(), aMapVE);
275 if (aCopyVLoop != aVertIter)
276 aProcVertexes.erase(aCopyVLoop, aVertIter);
277 if (aCopyELoop != anEdgeIter)
278 aProcEdges.erase(aCopyELoop, anEdgeIter);
280 // Check whether the next vertex already exists
281 if (aVertIter != aProcVertexes.end())
283 if (aVertIter != aProcVertexes.end() && anEdgeIter != aProcEdges.end()) {
284 aNextVertex = *aVertIter;
285 aNextDir = getOuterEdgeDirection(*anEdgeIter, aNextVertex);
286 aProcVertexes.erase(++aVertIter, aProcVertexes.end());
287 aProcEdges.erase(++anEdgeIter, aProcEdges.end());
289 // Recalculate current vertex and current direction
291 aProcVertexes.clear();
292 if (aMapVE.Extent() > 0) {
293 aNextVertex = findStartVertex(aMapVE, aDirX, aDirY);
294 aProcVertexes.push_back(aNextVertex);
296 aNextDir = aDirY.Reversed();
297 aCurNorm = aNorm.Reversed();
301 // if next vertex connected only to alone edge, this is a part of wire (not a closed loop),
302 // we need to go back through the list of already checked edges to find a branching vertex
303 if (!aMapVE.IsEmpty() && aMapVE.Contains(aNextVertex)
304 && aMapVE.FindFromKey(aNextVertex).Size() == 1) {
305 std::list<TopoDS_Vertex>::reverse_iterator aVRIter = aProcVertexes.rbegin();
306 std::list<TopoDS_Edge>::reverse_iterator aERIter = aProcEdges.rbegin();
307 if (aVRIter != aProcVertexes.rend())
309 if (aERIter != aProcEdges.rend())
312 for (; aERIter != aProcEdges.rend(); aERIter++, aVRIter++)
313 if (aMapVE.FindFromKey(*aVRIter).Size() > 2)
315 if (aERIter != aProcEdges.rend()
316 || (aVRIter != aProcVertexes.rend() && aMapVE.FindFromKey(*aVRIter).Size() == 1)) { // the branching vertex was found or current list of edges is a wire without branches
317 std::list<TopoDS_Edge>::iterator aEIter;
318 TopoDS_Edge aCurEdge;
319 if (aERIter != aProcEdges.rend()) {
320 aEIter = aERIter.base();
323 aEIter = aProcEdges.begin();
324 std::list<TopoDS_Wire> aTail;
325 createWireList(*aVRIter, aEIter, aProcEdges.end(), anEdgesInLoops, aTail);
326 std::list<TopoDS_Wire>::const_iterator aTailIter = aTail.begin();
327 for (; aTailIter != aTail.end(); aTailIter++)
328 if (!aTailIter->IsNull()) {
329 std::shared_ptr<GeomAPI_Shape> aWire(new GeomAPI_Shape);
330 aWire->setImpl(new TopoDS_Shape(*aTailIter));
331 theResultWires.push_back(aWire);
333 std::list<TopoDS_Vertex>::iterator aVIter = aVRIter.base();
334 std::list<TopoDS_Edge>::iterator aEItCopy = aEIter;
335 removeWasteEdges(--aVIter, aEItCopy, aProcVertexes.end(), aProcEdges.end(), aMapVE);
337 aProcEdges.erase(aEIter, aProcEdges.end());
338 aVIter = aVRIter.base();
339 aProcVertexes.erase(aVIter, aProcVertexes.end());
341 if (!aProcVertexes.empty()) {
342 aNextVertex = aProcVertexes.back();
343 if (!aCurEdge.IsNull())
344 aNextDir = getOuterEdgeDirection(aCurEdge, aNextVertex);
346 } else { // there is no branching vertex in the list of proceeded,
347 // so we should revert the list and go the opposite way
348 aProcVertexes.reverse();
349 aProcEdges.reverse();
350 aNextVertex = aProcVertexes.back();
352 aProcEdges.empty() ? aDirY : getOuterEdgeDirection(aProcEdges.back(), aNextVertex);
356 // When all edges of current component of connectivity are processed,
357 // we should repeat procedure for finding initial vertex in the remaining
358 if (!aMapVE.IsEmpty() && !aMapVE.Contains(aNextVertex)) {
359 aProcVertexes.clear();
362 aStartVertex = findStartVertex(aMapVE, aDirX, aDirY);
363 aProcVertexes.push_back(aStartVertex);
364 aNextVertex = aStartVertex;
365 aNextDir = aDirY.Reversed();
366 aCurNorm = aNorm.Reversed();
369 aCurVertex = aNextVertex;
373 if (theResultFaces.size() > 1)
374 fixIntersections(theResultFaces);
377 void GeomAlgoAPI_SketchBuilder::createFaces(const std::shared_ptr<GeomAPI_Pnt>& theOrigin,
378 const std::shared_ptr<GeomAPI_Dir>& theDirX,
379 const std::shared_ptr<GeomAPI_Dir>& theNorm,
380 const std::shared_ptr<GeomAPI_Shape>& theWire,
381 std::list<std::shared_ptr<GeomAPI_Shape> >& theResultFaces)
383 std::list<std::shared_ptr<GeomAPI_Shape> > aFilteredWires;
384 std::shared_ptr<GeomAPI_PlanarEdges> aWire =
385 std::dynamic_pointer_cast<GeomAPI_PlanarEdges>(theWire);
387 // Filter wires, return only faces.
388 createFaces(theOrigin, theDirX, theNorm,
389 aWire->getEdges(), theResultFaces, aFilteredWires);
392 } else { // it may be only one circle
393 std::shared_ptr<GeomAPI_Edge> anEdge = std::dynamic_pointer_cast<GeomAPI_Edge>(theWire);
395 std::list<std::shared_ptr<GeomAPI_Shape> > aList;
396 aList.push_back(anEdge);
397 createFaces(theOrigin, theDirX, theNorm,
398 aList, theResultFaces, aFilteredWires);
404 void GeomAlgoAPI_SketchBuilder::fixIntersections(
405 std::list<std::shared_ptr<GeomAPI_Shape> >& theFaces)
407 BRepClass_FaceClassifier aClassifier;
409 std::list<std::shared_ptr<GeomAPI_Shape> >::iterator anIter1 = theFaces.begin();
410 std::list<std::shared_ptr<GeomAPI_Shape> >::iterator anIter2;
411 for (; anIter1 != theFaces.end(); anIter1++) {
413 for (++anIter2; anIter2 != theFaces.end(); anIter2++) {
414 const TopoDS_Face& aF1 = (*anIter1)->impl<TopoDS_Face>();
415 assert(aF1.ShapeType() == TopAbs_FACE); // all items in result list should be faces
416 TopExp_Explorer aVert2((*anIter2)->impl<TopoDS_Shape>(), TopAbs_VERTEX);
417 for (; aVert2.More(); aVert2.Next()) {
418 const TopoDS_Vertex& aV = (const TopoDS_Vertex&)aVert2.Current();
419 aClassifier.Perform(aF1, BRep_Tool::Pnt(aV), tolerance);
420 TopAbs_State aState = aClassifier.State();
421 if (aState != TopAbs_IN && aState != TopAbs_ON)
424 if (aVert2.More()) { // second shape is not inside first, change the shapes order and repeat comparision
425 const TopoDS_Face& aF2 = (*anIter2)->impl<TopoDS_Face>();
426 assert(aF2.ShapeType() == TopAbs_FACE); // all items in result list should be faces
427 TopExp_Explorer aVert1((*anIter1)->impl<TopoDS_Shape>(), TopAbs_VERTEX);
428 for (; aVert1.More(); aVert1.Next()) {
429 const TopoDS_Vertex& aV = (const TopoDS_Vertex&)aVert2.Current();
430 aClassifier.Perform(aF2, BRep_Tool::Pnt(aV), tolerance);
431 TopAbs_State aState = aClassifier.State();
432 if (aState != TopAbs_IN && aState != TopAbs_ON)
435 if (!aVert1.More()) { // first shape should be cut from the second
436 BRepAlgoAPI_Cut aCut((*anIter2)->impl<TopoDS_Shape>(), (*anIter1)->impl<TopoDS_Shape>());
438 TopExp_Explorer anExp(aCut.Shape(), TopAbs_FACE);
439 bool isFirstFace = true;
440 for (; anExp.More(); anExp.Next()) {
441 if (anExp.Current().ShapeType() != TopAbs_FACE) continue;
443 (*anIter2)->setImpl(new TopoDS_Shape(anExp.Current()));
446 std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape);
447 aShape->setImpl(new TopoDS_Shape(anExp.Current()));
448 theFaces.push_back(aShape);
452 } else { // second shape should be cut from the first
453 BRepAlgoAPI_Cut aCut((*anIter1)->impl<TopoDS_Shape>(), (*anIter2)->impl<TopoDS_Shape>());
455 TopExp_Explorer anExp(aCut.Shape(), TopAbs_FACE);
456 bool isFirstFace = true;
457 for (; anExp.More(); anExp.Next()) {
458 if (anExp.Current().ShapeType() != TopAbs_FACE) continue;
460 (*anIter1)->setImpl(new TopoDS_Shape(anExp.Current()));
463 std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape);
464 aShape->setImpl(new TopoDS_Shape(anExp.Current()));
465 theFaces.push_back(aShape);
473 // =================== Auxiliary functions ====================================
474 const TopoDS_Vertex& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
475 const gp_Dir& theDirX, const gp_Dir& theDirY)
477 int aStartVertexInd = 1;
478 double aMaxX = -DBL_MAX;
479 double aMaxY = -DBL_MAX;
480 int aNbVert = theMapVE.Extent();
481 for (int i = 1; i <= aNbVert; i++) {
482 const TopoDS_Vertex& aV = (const TopoDS_Vertex&) theMapVE.FindKey(i);
483 const gp_Pnt& aVertPnt = BRep_Tool::Pnt(aV);
485 double aX = aVertPnt.XYZ().Dot(theDirX.XYZ());
486 double aY = aVertPnt.XYZ().Dot(theDirY.XYZ());
487 if ((aX > aMaxX || (fabs(aX - aMaxX) < tolerance && aY > aMaxY))
488 && theMapVE.FindFromIndex(i).Extent() > 1) {
494 return static_cast<const TopoDS_Vertex&>(theMapVE.FindKey(aStartVertexInd));
497 void findNextVertex(const TopoDS_Vertex& theStartVertex,
498 const BOPCol_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap,
499 const gp_Dir& theStartDir, const gp_Dir& theNormal, TopoDS_Vertex& theNextVertex,
500 TopoDS_Edge& theNextEdge, gp_Dir& theNextDir)
502 theNextVertex = TopoDS_Vertex();
503 const BOPCol_ListOfShape& anEdgesList = theVertexEdgeMap.FindFromKey(theStartVertex);
504 int anEdgesNum = anEdgesList.Extent();
505 BOPCol_ListOfShape::Iterator aEdIter(anEdgesList);
506 double aBestEdgeProj = DBL_MAX;
507 for (; aEdIter.More(); aEdIter.Next()) {
508 const TopoDS_Edge& anEdge = static_cast<const TopoDS_Edge&>(aEdIter.Value());
509 gp_Dir aTang = getOuterEdgeDirection(anEdge, theStartVertex);
512 // The projection is normalized in segment (-1, 1),
513 // where (-1, 0] corresponds to the angles (pi/2, 0] between theStartDir and aTang
514 // and [0, 1) corresponds to the angles [0, -pi/2)
515 double aProj = (aTang.Dot(theStartDir) - 1.0) * 0.5;
516 if (anEdgesNum > 1 && fabs(fabs(aProj) - 1) < tolerance)
518 if (theStartDir.DotCross(aTang, theNormal) < tolerance)
521 if (aProj < aBestEdgeProj) {
522 aBestEdgeProj = aProj;
523 theNextEdge = anEdge;
524 TopExp_Explorer aVertExp(theNextEdge, TopAbs_VERTEX);
525 for (; aVertExp.More(); aVertExp.Next())
526 if (!aVertExp.Current().IsSame(theStartVertex)) {
527 theNextVertex = static_cast<const TopoDS_Vertex&>(aVertExp.Current());
528 theNextDir = getOuterEdgeDirection(anEdge, theNextVertex);
531 if (!aVertExp.More()) { // This edge is a full circle
532 TopoDS_Vertex aV1, aV2;
533 TopExp::Vertices(theNextEdge, aV1, aV2);
534 if (aV1.Orientation() == theStartVertex.Orientation())
538 theNextDir = getOuterEdgeDirection(anEdge, theNextVertex);
543 // Probably there are two tangent edges. We will take the edge differs from current one
544 if (theNextVertex.IsNull() && anEdgesNum == 2) {
545 BOPCol_ListOfShape::Iterator aEdIter(anEdgesList);
546 if (aEdIter.Value() == theNextEdge)
548 theNextEdge = static_cast<const TopoDS_Edge&>(aEdIter.Value());
549 TopoDS_Vertex aV1, aV2;
550 TopExp::Vertices(theNextEdge, aV1, aV2);
551 theNextVertex = theStartVertex.IsSame(aV1) ? aV2 : aV1;
552 theNextDir = getOuterEdgeDirection(theNextEdge, theNextVertex);
556 static void addEdgeToWire(const TopoDS_Edge& theEdge, const BRep_Builder& theBuilder,
557 TopoDS_Shape& theSpliceVertex, TopoDS_Wire& theWire)
559 TopoDS_Edge anEdge = theEdge;
560 bool isCurVertChanged = false;
561 TopoDS_Shape aCurVertChanged;
563 TopExp_Explorer aVertExp(theEdge, TopAbs_VERTEX);
564 for (; aVertExp.More(); aVertExp.Next()) {
565 const TopoDS_Shape& aVertex = aVertExp.Current();
566 if (aVertex.IsSame(theSpliceVertex)
567 && aVertex.Orientation() != theEdge.Orientation()) { // Current vertex is the last for the edge, so its orientation is wrong, need to revert the edge
571 if (!aVertex.IsSame(theSpliceVertex)) {
572 aCurVertChanged = aVertex;
573 isCurVertChanged = true;
576 theSpliceVertex = isCurVertChanged ? aCurVertChanged : aVertExp.Current();
578 theBuilder.Add(theWire, anEdge);
581 void createFace(const TopoDS_Vertex& theStartVertex,
582 const std::list<TopoDS_Edge>::iterator& theStartEdge,
583 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
584 const gp_Pln& thePlane,
585 TopoDS_Face& theResFace)
587 TopoDS_Wire aResWire;
588 BRep_Builder aBuilder;
589 aBuilder.MakeWire(aResWire);
591 TopoDS_Vertex aCurVertex = theStartVertex;
592 std::list<TopoDS_Edge>::const_iterator anEdgeIter = theStartEdge;
593 for (; anEdgeIter != theEndOfEdges; anEdgeIter++) {
594 if (!anEdgeIter->IsNull())
595 addEdgeToWire(*anEdgeIter, aBuilder, aCurVertex, aResWire);
598 BRepBuilderAPI_MakeFace aFaceBuilder(thePlane, aResWire);
599 if (aFaceBuilder.Error() == BRepBuilderAPI_FaceDone)
600 theResFace = aFaceBuilder.Face();
603 void createWireList(const TopoDS_Vertex& theStartVertex,
604 const std::list<TopoDS_Edge>::iterator& theStartEdge,
605 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
606 const std::set<TopoDS_Edge*>& theEdgesInLoops,
607 std::list<TopoDS_Wire>& theResWires)
609 BRep_Builder aBuilder;
610 bool needNewWire = true;
611 TopoDS_Vertex aCurVertex = theStartVertex;
613 std::list<TopoDS_Edge>::iterator anIter = theStartEdge;
614 while (anIter != theEndOfEdges) {
615 while (anIter != theEndOfEdges && needNewWire && theEdgesInLoops.count(&(*anIter)) != 0) {
616 TopExp_Explorer aVertExp(*anIter, TopAbs_VERTEX);
617 for (; aVertExp.More(); aVertExp.Next())
618 if (!aVertExp.Current().IsSame(aCurVertex)) {
619 aCurVertex = static_cast<const TopoDS_Vertex&>(aVertExp.Current());
624 if (anIter == theEndOfEdges)
627 if (needNewWire) { // The new wire should be created
629 aBuilder.MakeWire(aWire);
630 theResWires.push_back(aWire);
632 } else if (theEdgesInLoops.count(&(*anIter)) != 0) { // There was found the edge already used in loop.
633 // Current wire should be released and new one should started
638 addEdgeToWire(*anIter, aBuilder, aCurVertex, theResWires.back());
643 gp_Dir getOuterEdgeDirection(const TopoDS_Edge& theEdge, const TopoDS_Vertex& theVertex)
645 gp_Pnt aVertexPnt = BRep_Tool::Pnt(theVertex);
647 // Convert the edge to the curve to calculate the tangency.
648 // There should be only one curve in the edge.
649 double aFirst, aLast;
650 Handle(Geom_Curve) aCurve = BRep_Tool::Curve(theEdge, aFirst, aLast);
654 // A direction is determined not in the boundary points but in the points with small shift.
655 // It was done to avoid tangency between circle and other edge in the shared vertex.
656 aCurve->D1(aFirst + shift > aLast ? aFirst : aFirst + shift, aPnt, aTang);
657 aCurve->D0(aFirst, aPnt);
658 if (aVertexPnt.IsEqual(aPnt, tolerance))
659 return gp_Dir(aTang.Reversed());
661 aCurve->D1(aLast - shift < aFirst ? aLast : aLast - shift, aPnt, aTang);
662 return gp_Dir(aTang);
665 void removeWasteEdges(std::list<TopoDS_Vertex>::iterator& theStartVertex,
666 std::list<TopoDS_Edge>::iterator& theStartEdge,
667 const std::list<TopoDS_Vertex>::iterator& theEndOfVertexes,
668 const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
669 BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE)
671 bool isVertStep = true;
672 while (theStartVertex != theEndOfVertexes && theStartEdge != theEndOfEdges) {
673 BOPCol_ListOfShape& aBunch = theMapVE.ChangeFromKey(*theStartVertex);
674 BOPCol_ListOfShape::Iterator anApprEdge(aBunch);
675 for (; anApprEdge.More(); anApprEdge.Next())
676 if (anApprEdge.Value().IsSame(*theStartEdge))
678 if (anApprEdge.More())
679 aBunch.Remove(anApprEdge);
685 // check current vertex to be a branching point
686 // if so, it will be a new starting point to find a loop
687 if (aBunch.Size() > 1)
690 isVertStep = !isVertStep;
693 // The map of vertex-edges may be changed
694 BOPCol_IndexedDataMapOfShapeListOfShape aMapVECopy;
695 BOPCol_IndexedDataMapOfShapeListOfShape::Iterator aMapIter(theMapVE);
696 for (int ind = 1; aMapIter.More(); aMapIter.Next(), ind++)
697 if (!aMapIter.Value().IsEmpty())
698 aMapVECopy.Add(theMapVE.FindKey(ind), aMapIter.Value());
700 theMapVE.Exchange(aMapVECopy);