src/SketchPlugin/SketchPlugin_Offset.cpp

   1 // Copyright (C) 2020  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include <SketchPlugin_Offset.h>
  21
  22 #include <SketchPlugin_Sketch.h>
  23 #include <SketchPlugin_Line.h>
  24 #include <SketchPlugin_Point.h>
  25 #include <SketchPlugin_Arc.h>
  26 #include <SketchPlugin_Circle.h>
  27 #include <SketchPlugin_Ellipse.h>
  28 #include <SketchPlugin_EllipticArc.h>
  29 #include <SketchPlugin_BSpline.h>
  30 #include <SketchPlugin_BSplinePeriodic.h>
  31 #include <SketchPlugin_Tools.h>
  32
  33 #include <SketcherPrs_Factory.h>
  34
  35 #include <Events_InfoMessage.h>
  36
  37 #include <ModelAPI_AttributeBoolean.h>
  38 #include <ModelAPI_AttributeDouble.h>
  39 #include <ModelAPI_AttributeDoubleArray.h>
  40 #include <ModelAPI_AttributeInteger.h>
  41 #include <ModelAPI_AttributeIntArray.h>
  42 #include <ModelAPI_AttributeRefList.h>
  43 #include <ModelAPI_Events.h>
  44 #include <ModelAPI_ResultConstruction.h>
  45 #include <ModelAPI_Tools.h>
  46 #include <ModelAPI_Validator.h>
  47
  48 #include <GeomAlgoAPI_MakeShapeList.h>
  49 #include <GeomAlgoAPI_Offset.h>
  50 #include <GeomAlgoAPI_ShapeTools.h>
  51 #include <GeomAlgoAPI_WireBuilder.h>
  52
  53 #include <GeomAPI_BSpline.h>
  54 #include <GeomAPI_Circ.h>
  55 #include <GeomAPI_Edge.h>
  56 #include <GeomAPI_Ellipse.h>
  57 #include <GeomAPI_ShapeExplorer.h>
  58 #include <GeomAPI_Wire.h>
  59 #include <GeomAPI_WireExplorer.h>
  60
  61 #include <GeomDataAPI_Point2D.h>
  62 #include <GeomDataAPI_Point2DArray.h>
  63
  64 static const double tolerance = 1.e-7;
  65
  66 SketchPlugin_Offset::SketchPlugin_Offset()
  67 {
  68 }
  69
  70 void SketchPlugin_Offset::initAttributes()
  71 {
  72   data()->addAttribute(EDGES_ID(), ModelAPI_AttributeRefList::typeId());
  73   data()->addAttribute(VALUE_ID(), ModelAPI_AttributeDouble::typeId());
  74   data()->addAttribute(REVERSED_ID(), ModelAPI_AttributeBoolean::typeId());
  75
  76   // store original entities
  77   data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(), ModelAPI_AttributeRefList::typeId());
  78   // store offset entities
  79   data()->addAttribute(SketchPlugin_Constraint::ENTITY_B(), ModelAPI_AttributeRefList::typeId());
  80   // store mapping between original entity and index of the corresponding offset entity
  81   data()->addAttribute(SketchPlugin_Constraint::ENTITY_C(), ModelAPI_AttributeIntArray::typeId());
  82
  83   ModelAPI_Session::get()->validators()->
  84       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_A());
  85   ModelAPI_Session::get()->validators()->
  86       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_B());
  87   ModelAPI_Session::get()->validators()->
  88       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_C());
  89 }
  90
  91 void SketchPlugin_Offset::execute()
  92 {
  93   SketchPlugin_Sketch* aSketch = sketch();
  94   if (!aSketch) return;
  95
  96   // 1. Sketch plane
  97   std::shared_ptr<GeomAPI_Pln> aPlane = aSketch->plane();
  98
  99   // 2. Offset value
 100   AttributeDoublePtr aValueAttr = real(VALUE_ID());
 101   if (!aValueAttr->isInitialized()) return;
 102   double aValue = aValueAttr->value();
 103   if (aValue < tolerance) return;
 104
 105   // 2.a. Reversed?
 106   AttributeBooleanPtr aReversedAttr = boolean(REVERSED_ID());
 107   if (!aReversedAttr->isInitialized()) return;
 108   if (aReversedAttr->value()) aValue = -aValue; // reverse offset direction
 109
 110   // 3. List of all selected edges
 111   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 112   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 113
 114   // 4. Put all selected edges in a set to pass them into findWireOneWay() below
 115   std::set<FeaturePtr> anEdgesSet;
 116   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 117   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 118     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 119     if (aFeature) {
 120       anEdgesSet.insert(aFeature);
 121     }
 122   }
 123
 124   // Wait all objects being created, then send update events
 125   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 126   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
 127   if (isUpdateFlushed)
 128     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
 129
 130   // 5. Gather wires and make offset for each wire
 131   ListOfMakeShape anOffsetAlgos;
 132   std::set<FeaturePtr> aProcessedEdgesSet;
 133   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 134     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 135     if (aFeature.get()) {
 136       if (aProcessedEdgesSet.find(aFeature) != aProcessedEdgesSet.end())
 137         continue;
 138
 139       // 5.a. End points (if any)
 140       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 141       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 142
 143       // 5.b. Find a chain of edges
 144       std::list<FeaturePtr> aChain;
 145       aChain.push_back(aFeature);
 146       if (aStartPoint && anEndPoint) { // not closed edge
 147         bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet, aProcessedEdgesSet, aChain, true);
 148         if (!isClosed)
 149           findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet, aProcessedEdgesSet, aChain, false);
 150       }
 151       aProcessedEdgesSet.insert(aFeature);
 152
 153       // 5.c. Make wire
 154       ListOfShape aTopoChain;
 155       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 156       for (; aChainIt != aChain.end(); ++aChainIt) {
 157         FeaturePtr aChainFeature = (*aChainIt);
 158         GeomShapePtr aTopoEdge = aChainFeature->lastResult()->shape();
 159         if (aTopoEdge->shapeType() == GeomAPI_Shape::EDGE) {
 160           aTopoChain.push_back(aTopoEdge);
 161         }
 162       }
 163       std::shared_ptr<GeomAlgoAPI_WireBuilder> aWireBuilder(
 164           new GeomAlgoAPI_WireBuilder(aTopoChain));
 165
 166       GeomShapePtr aWireShape = aWireBuilder->shape();
 167       GeomWirePtr aWire (new GeomAPI_Wire (aWireShape));
 168
 169       // Fix for a problem of offset side change with selection change.
 170       // Wire direction is defined by the first selected edge of this wire.
 171       double aSign = 1.;
 172       if (!aWire->isClosed()) {
 173         ListOfShape aModified;
 174         // First selected edge of current chain
 175         GeomShapePtr aFirstSel = aFeature->lastResult()->shape();
 176         aWireBuilder->modified(aFirstSel, aModified);
 177         GeomShapePtr aModFS = aModified.front();
 178         if (aModFS->orientation() != aFirstSel->orientation())
 179           aSign = -1.;
 180       }
 181
 182       // 5.d. Make offset for the wire
 183       std::shared_ptr<GeomAlgoAPI_Offset> anOffsetShape(
 184           new GeomAlgoAPI_Offset(aPlane, aWireShape, aValue*aSign));
 185
 186       std::shared_ptr<GeomAlgoAPI_MakeShapeList> aMakeList(new GeomAlgoAPI_MakeShapeList);
 187       aMakeList->appendAlgo(aWireBuilder);
 188       aMakeList->appendAlgo(anOffsetShape);
 189       anOffsetAlgos.push_back(aMakeList);
 190     }
 191   }
 192
 193   // 6. Store offset results.
 194   //    Create sketch feature for each edge of anOffsetShape, and also store
 195   //    created features in CREATED_ID() to remove them on next execute()
 196   addToSketch(anOffsetAlgos);
 197
 198   // send events to update the sub-features by the solver
 199   if (isUpdateFlushed)
 200     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 201 }
 202
 203 bool SketchPlugin_Offset::findWireOneWay (const FeaturePtr& theFirstEdge,
 204                                           const FeaturePtr& theEdge,
 205                                           const std::shared_ptr<GeomDataAPI_Point2D>& theEndPoint,
 206                                           std::set<FeaturePtr>& theEdgesSet,
 207                                           std::set<FeaturePtr>& theProcessedEdgesSet,
 208                                           std::list<FeaturePtr>& theChain,
 209                                           const bool isPrepend)
 210 {
 211   // 1. Find a single edge, coincident to theEndPoint by one of its ends
 212   if (!theEndPoint) return false;
 213
 214   FeaturePtr aNextEdgeFeature;
 215   int nbFound = 0;
 216
 217   std::set<AttributePoint2DPtr> aCoincPoints =
 218       SketchPlugin_Tools::findPointsCoincidentToPoint(theEndPoint);
 219
 220   std::set<AttributePoint2DPtr>::iterator aPointsIt = aCoincPoints.begin();
 221   for (; aPointsIt != aCoincPoints.end(); aPointsIt++) {
 222     AttributePoint2DPtr aP = (*aPointsIt);
 223     FeaturePtr aCoincFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aP->owner());
 224     bool isInSet = (theEdgesSet.find(aCoincFeature) != theEdgesSet.end());
 225
 226     // Condition 0: not auxiliary
 227     if (!isInSet && aCoincFeature->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value())
 228       continue;
 229
 230     // Condition 1: not a point feature
 231     if (aCoincFeature->getKind() != SketchPlugin_Point::ID()) {
 232       // Condition 2: it is not the current edge
 233       if (aCoincFeature != theEdge) {
 234         // Condition 3: it is in the set of interest.
 235         //              Empty set means all sketch edges.
 236         if (isInSet || theEdgesSet.empty()) {
 237           // Condition 4: consider only features with two end points
 238           std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 239           SketchPlugin_SegmentationTools::getFeaturePoints(aCoincFeature, aP1, aP2);
 240           if (aP1 && aP2) {
 241             // Condition 5: consider only features, that have aP as one of they ends.
 242             //              For example, we do not need an arc, coincident to aP by its center.
 243             if (theEndPoint->pnt()->isEqual(aP1->pnt()) ||
 244                 theEndPoint->pnt()->isEqual(aP2->pnt())) {
 245               // Condition 6: only one edge can prolongate the chain. If several, we stop here.
 246               nbFound++;
 247               if (nbFound > 1)
 248                 return false;
 249
 250               // One found
 251               aNextEdgeFeature = aCoincFeature;
 252             }
 253           }
 254         }
 255       }
 256     }
 257   }
 258
 259   // Only one edge can prolongate the chain. If several or none, we stop here.
 260   if (nbFound != 1)
 261     return false;
 262
 263   // 2. So, we have the single edge, that prolongate the chain
 264
 265   // Condition 7: if we reached the very first edge of the chain
 266   if (aNextEdgeFeature == theFirstEdge)
 267     // Closed chain found
 268     return true;
 269
 270   // 3. Add the found edge to the chain
 271   if (isPrepend)
 272     theChain.push_front(aNextEdgeFeature);
 273   else
 274     theChain.push_back(aNextEdgeFeature);
 275   theProcessedEdgesSet.insert(aNextEdgeFeature);
 276
 277   // 4. Which end of aNextEdgeFeature we need to proceed
 278   std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 279   SketchPlugin_SegmentationTools::getFeaturePoints(aNextEdgeFeature, aP1, aP2);
 280   if (aP2->pnt()->isEqual(theEndPoint->pnt())) {
 281     // reversed
 282     aP2 = aP1;
 283   }
 284
 285   // 5. Continue gathering the chain (recursive)
 286   return findWireOneWay (theFirstEdge, aNextEdgeFeature, aP2, theEdgesSet, theProcessedEdgesSet, theChain, isPrepend);
 287 }
 288
 289 static void setRefListValue(AttributeRefListPtr theList, int theListSize,
 290                             ObjectPtr theValue, int theIndex)
 291 {
 292   if (theIndex < theListSize) {
 293     ObjectPtr aCur = theList->object(theIndex);
 294     if (aCur != theValue)
 295       theList->substitute(aCur, theValue);
 296   }
 297   else
 298     theList->append(theValue);
 299 }
 300
 301 // Reorder shapes according to the wire's order
 302 static void reorderShapes(ListOfShape& theShapes, GeomShapePtr theWire)
 303 {
 304   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aShapes;
 305   aShapes.insert(theShapes.begin(), theShapes.end());
 306   theShapes.clear();
 307
 308   GeomWirePtr aWire(new GeomAPI_Wire(theWire));
 309   GeomAPI_WireExplorer anExp(aWire);
 310   for (; anExp.more(); anExp.next()) {
 311     GeomShapePtr aCurEdge = anExp.current();
 312     auto aFound = aShapes.find(aCurEdge);
 313     if (aFound != aShapes.end()) {
 314       theShapes.push_back(aCurEdge);
 315       aShapes.erase(aFound);
 316     }
 317   }
 318 }
 319
 320 static void removeLastFromIndex(AttributeRefListPtr theList, int theListSize, int& theLastIndex)
 321 {
 322   if (theLastIndex < theListSize) {
 323     std::set<int> anIndicesToRemove;
 324     for (; theLastIndex < theListSize; ++theLastIndex)
 325       anIndicesToRemove.insert(theLastIndex);
 326     theList->remove(anIndicesToRemove);
 327   }
 328 }
 329
 330 void SketchPlugin_Offset::addToSketch(const ListOfMakeShape& theOffsetAlgos)
 331 {
 332   AttributeRefListPtr aSelectedRefList = reflist(EDGES_ID());
 333   AttributeRefListPtr aBaseRefList = reflist(ENTITY_A());
 334   AttributeRefListPtr anOffsetRefList = reflist(ENTITY_B());
 335   AttributeIntArrayPtr anOffsetToBaseMap = intArray(ENTITY_C());
 336
 337   // compare the list of selected edges and the previously stored,
 338   // and store maping between them
 339   std::map<ObjectPtr, std::list<ObjectPtr> > aMapExistent;
 340   std::list<ObjectPtr> anObjectsToRemove;
 341   std::list<ObjectPtr> aSelectedList = aSelectedRefList->list();
 342   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 343        aSIt != aSelectedList.end(); ++aSIt) {
 344     aMapExistent[*aSIt] = std::list<ObjectPtr>();
 345   }
 346   for (int anIndex = 0, aSize = anOffsetRefList->size(); anIndex < aSize; ++anIndex) {
 347     ObjectPtr aCurrent = anOffsetRefList->object(anIndex);
 348     int aBaseIndex = anOffsetToBaseMap->value(anIndex);
 349     if (aBaseIndex >= 0) {
 350       ObjectPtr aBaseObj = aBaseRefList->object(aBaseIndex);
 351       std::map<ObjectPtr, std::list<ObjectPtr> >::iterator aFound = aMapExistent.find(aBaseObj);
 352       if (aFound != aMapExistent.end())
 353         aFound->second.push_back(aCurrent);
 354       else
 355         anObjectsToRemove.push_back(aCurrent);
 356     }
 357     else
 358       anObjectsToRemove.push_back(aCurrent);
 359   }
 360
 361   // update lists of base shapes and of offset shapes
 362   int aBaseListSize = aBaseRefList->size();
 363   int anOffsetListSize = anOffsetRefList->size();
 364   int aBaseListIndex = 0, anOffsetListIndex = 0;
 365   std::list<int> anOffsetBaseBackRefs;
 366   std::set<GeomShapePtr, GeomAPI_Shape::ComparatorWithOri> aProcessedOffsets;
 367   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 368        aSIt != aSelectedList.end(); ++aSIt) {
 369     // find an offseted edge
 370     FeaturePtr aBaseFeature = ModelAPI_Feature::feature(*aSIt);
 371     GeomShapePtr aBaseShape = aBaseFeature->lastResult()->shape();
 372     ListOfShape aNewShapes;
 373     for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 374          anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 375       (*anAlgoIt)->generated(aBaseShape, aNewShapes);
 376       if (!aNewShapes.empty()) {
 377         reorderShapes(aNewShapes, (*anAlgoIt)->shape());
 378         break;
 379       }
 380     }
 381
 382     // store base feature
 383     setRefListValue(aBaseRefList, aBaseListSize, *aSIt, aBaseListIndex);
 384
 385     // create or update an offseted feature
 386     const std::list<ObjectPtr>& anImages = aMapExistent[*aSIt];
 387     std::list<ObjectPtr>::const_iterator anImgIt = anImages.begin();
 388     for (ListOfShape::iterator aNewIt = aNewShapes.begin(); aNewIt != aNewShapes.end(); ++aNewIt) {
 389       FeaturePtr aNewFeature;
 390       if (anImgIt != anImages.end())
 391         aNewFeature = ModelAPI_Feature::feature(*anImgIt++);
 392       updateExistentOrCreateNew(*aNewIt, aNewFeature, anObjectsToRemove);
 393       aProcessedOffsets.insert(*aNewIt);
 394
 395       // store an offseted feature
 396       setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 397
 398       anOffsetBaseBackRefs.push_back(aBaseListIndex);
 399       ++anOffsetListIndex;
 400     }
 401     ++aBaseListIndex;
 402     anObjectsToRemove.insert(anObjectsToRemove.end(), anImgIt, anImages.end());
 403   }
 404   // create arcs generated from vertices
 405   for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 406        anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 407     GeomShapePtr aCurWire = (*anAlgoIt)->shape();
 408     GeomAPI_ShapeExplorer anExp(aCurWire, GeomAPI_Shape::EDGE);
 409     for (; anExp.more(); anExp.next()) {
 410       GeomShapePtr aCurEdge = anExp.current();
 411       if (aProcessedOffsets.find(aCurEdge) == aProcessedOffsets.end()) {
 412         FeaturePtr aNewFeature;
 413         updateExistentOrCreateNew(aCurEdge, aNewFeature, anObjectsToRemove);
 414         aProcessedOffsets.insert(aCurEdge);
 415
 416         // store an offseted feature
 417         setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 418
 419         anOffsetBaseBackRefs.push_back(-1);
 420         ++anOffsetListIndex;
 421       }
 422     }
 423   }
 424
 425   removeLastFromIndex(aBaseRefList, aBaseListSize, aBaseListIndex);
 426   removeLastFromIndex(anOffsetRefList, anOffsetListSize, anOffsetListIndex);
 427
 428   anOffsetToBaseMap->setSize((int)anOffsetBaseBackRefs.size(), false);
 429   int anIndex = 0;
 430   for (std::list<int>::iterator anIt = anOffsetBaseBackRefs.begin();
 431        anIt != anOffsetBaseBackRefs.end(); ++anIt) {
 432     anOffsetToBaseMap->setValue(anIndex++, *anIt, false);
 433   }
 434
 435   // remove unused objects
 436   std::set<FeaturePtr> aSet;
 437   for (std::list<ObjectPtr>::iterator anIt = anObjectsToRemove.begin();
 438        anIt != anObjectsToRemove.end(); ++anIt) {
 439     FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 440     if (aFeature)
 441       aSet.insert(aFeature);
 442   }
 443   ModelAPI_Tools::removeFeaturesAndReferences(aSet);
 444 }
 445
 446 static void findOrCreateFeatureByKind(SketchPlugin_Sketch* theSketch,
 447                                       const std::string& theFeatureKind,
 448                                       FeaturePtr& theFeature,
 449                                       std::list<ObjectPtr>& thePoolOfFeatures)
 450 {
 451   if (theFeature) {
 452     // check the feature type is the same as required
 453     if (theFeature->getKind() != theFeatureKind) {
 454       // return feature to the pool and try to find the most appropriate
 455       thePoolOfFeatures.push_back(theFeature);
 456       theFeature = FeaturePtr();
 457     }
 458   }
 459   if (!theFeature) {
 460     // try to find appropriate feature in the pool
 461     for (std::list<ObjectPtr>::iterator it = thePoolOfFeatures.begin();
 462          it != thePoolOfFeatures.end(); ++it) {
 463       FeaturePtr aCurFeature = ModelAPI_Feature::feature(*it);
 464       if (aCurFeature->getKind() == theFeatureKind) {
 465         theFeature = aCurFeature;
 466         thePoolOfFeatures.erase(it);
 467         break;
 468       }
 469     }
 470     // feature not found, create new
 471     if (!theFeature)
 472       theFeature = theSketch->addFeature(theFeatureKind);
 473   }
 474 }
 475
 476 void SketchPlugin_Offset::updateExistentOrCreateNew(const GeomShapePtr& theShape,
 477                                                     FeaturePtr& theFeature,
 478                                                     std::list<ObjectPtr>& thePoolOfFeatures)
 479 {
 480   if (theShape->shapeType() != GeomAPI_Shape::EDGE)
 481     return;
 482
 483   std::shared_ptr<GeomAPI_Edge> aResEdge(new GeomAPI_Edge(theShape));
 484
 485   std::shared_ptr<GeomAPI_Pnt2d> aFP, aLP;
 486   std::shared_ptr<GeomAPI_Pnt> aFP3d = aResEdge->firstPoint();
 487   std::shared_ptr<GeomAPI_Pnt> aLP3d = aResEdge->lastPoint();
 488   if (aFP3d && aLP3d) {
 489     aFP = sketch()->to2D(aFP3d);
 490     aLP = sketch()->to2D(aLP3d);
 491   }
 492
 493   if (aResEdge->isLine()) {
 494     findOrCreateFeatureByKind(sketch(), SketchPlugin_Line::ID(), theFeature, thePoolOfFeatures);
 495
 496     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 497       (theFeature->attribute(SketchPlugin_Line::START_ID()))->setValue(aFP);
 498     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 499       (theFeature->attribute(SketchPlugin_Line::END_ID()))->setValue(aLP);
 500   }
 501   else if (aResEdge->isArc()) {
 502     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 503     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 504     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 505
 506     findOrCreateFeatureByKind(sketch(), SketchPlugin_Arc::ID(), theFeature, thePoolOfFeatures);
 507
 508     GeomDirPtr aCircNormal = aCircEdge->normal();
 509     GeomDirPtr aSketchNormal = sketch()->coordinatePlane()->normal();
 510     if (aSketchNormal->dot(aCircNormal) < -tolerance)
 511       std::swap(aFP, aLP);
 512
 513     bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 514     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 515       (theFeature->attribute(SketchPlugin_Arc::END_ID()))->setValue(aLP);
 516     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 517       (theFeature->attribute(SketchPlugin_Arc::START_ID()))->setValue(aFP);
 518     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 519       (theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCP);
 520     theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 521   }
 522   else if (aResEdge->isCircle()) {
 523     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 524     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 525     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 526
 527     findOrCreateFeatureByKind(sketch(), SketchPlugin_Circle::ID(), theFeature, thePoolOfFeatures);
 528
 529     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 530       (theFeature->attribute(SketchPlugin_Circle::CENTER_ID()))->setValue(aCP);
 531     theFeature->real(SketchPlugin_Circle::RADIUS_ID())->setValue(aCircEdge->radius());
 532   }
 533   else if (aResEdge->isEllipse()) {
 534     std::shared_ptr<GeomAPI_Ellipse> anEllipseEdge = aResEdge->ellipse();
 535
 536     GeomPointPtr aCP3d = anEllipseEdge->center();
 537     GeomPnt2dPtr aCP = sketch()->to2D(aCP3d);
 538
 539     GeomPointPtr aFocus3d = anEllipseEdge->firstFocus();
 540     GeomPnt2dPtr aFocus = sketch()->to2D(aFocus3d);
 541
 542     if (aFP3d && aLP3d) {
 543       // Elliptic arc
 544       findOrCreateFeatureByKind(sketch(), SketchPlugin_EllipticArc::ID(),
 545                                 theFeature, thePoolOfFeatures);
 546
 547       bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 548       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 549         (theFeature->attribute(SketchPlugin_EllipticArc::CENTER_ID()))->setValue(aCP);
 550       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 551         (theFeature->attribute(SketchPlugin_EllipticArc::FIRST_FOCUS_ID()))->setValue(aFocus);
 552       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 553         (theFeature->attribute(SketchPlugin_EllipticArc::START_POINT_ID()))->setValue(aFP);
 554       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 555         (theFeature->attribute(SketchPlugin_EllipticArc::END_POINT_ID()))->setValue(aLP);
 556       theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 557     }
 558     else {
 559       // Ellipse
 560       findOrCreateFeatureByKind(sketch(), SketchPlugin_Ellipse::ID(),
 561                                 theFeature, thePoolOfFeatures);
 562
 563       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 564         (theFeature->attribute(SketchPlugin_Ellipse::CENTER_ID()))->setValue(aCP);
 565       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 566         (theFeature->attribute(SketchPlugin_Ellipse::FIRST_FOCUS_ID()))->setValue(aFocus);
 567       theFeature->real(SketchPlugin_Ellipse::MINOR_RADIUS_ID())->setValue(
 568         anEllipseEdge->minorRadius());
 569     }
 570   }
 571   else {
 572     // convert to b-spline
 573     mkBSpline(theFeature, aResEdge, thePoolOfFeatures);
 574   }
 575
 576   if (theFeature.get()) {
 577     theFeature->boolean(SketchPlugin_SketchEntity::COPY_ID())->setValue(true);
 578     theFeature->execute();
 579
 580     static Events_ID aRedisplayEvent = Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY);
 581     ModelAPI_EventCreator::get()->sendUpdated(theFeature, aRedisplayEvent);
 582     const std::list<ResultPtr>& aResults = theFeature->results();
 583     for (std::list<ResultPtr>::const_iterator anIt = aResults.begin();
 584          anIt != aResults.end(); ++anIt)
 585       ModelAPI_EventCreator::get()->sendUpdated(*anIt, aRedisplayEvent);
 586   }
 587 }
 588
 589 void SketchPlugin_Offset::mkBSpline (FeaturePtr& theResult,
 590                                      const GeomEdgePtr& theEdge,
 591                                      std::list<ObjectPtr>& thePoolOfFeatures)
 592 {
 593   GeomCurvePtr aCurve (new GeomAPI_Curve (theEdge));
 594   // Forced conversion to b-spline, if aCurve is not b-spline
 595   GeomBSplinePtr aBSpline = GeomAPI_BSpline::convertToBSpline(aCurve);
 596
 597   const std::string& aBSplineKind = aBSpline->isPeriodic() ? SketchPlugin_BSplinePeriodic::ID()
 598                                                            : SketchPlugin_BSpline::ID();
 599   findOrCreateFeatureByKind(sketch(), aBSplineKind, theResult, thePoolOfFeatures);
 600
 601   theResult->integer(SketchPlugin_BSpline::DEGREE_ID())->setValue(aBSpline->degree());
 602
 603   AttributePoint2DArrayPtr aPolesAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2DArray>
 604     (theResult->attribute(SketchPlugin_BSpline::POLES_ID()));
 605   std::list<GeomPointPtr> aPoles = aBSpline->poles();
 606   aPolesAttr->setSize((int)aPoles.size());
 607   std::list<GeomPointPtr>::iterator anIt = aPoles.begin();
 608   for (int anIndex = 0; anIt != aPoles.end(); ++anIt, ++anIndex) {
 609     GeomPnt2dPtr aPoleInSketch = sketch()->to2D(*anIt);
 610     aPolesAttr->setPnt(anIndex, aPoleInSketch);
 611   }
 612
 613   AttributeDoubleArrayPtr aWeightsAttr =
 614       theResult->data()->realArray(SketchPlugin_BSpline::WEIGHTS_ID());
 615   std::list<double> aWeights = aBSpline->weights();
 616   if (aWeights.empty()) { // rational B-spline
 617     int aSize = (int)aPoles.size();
 618     aWeightsAttr->setSize(aSize);
 619     for (int anIndex = 0; anIndex < aSize; ++anIndex)
 620       aWeightsAttr->setValue(anIndex, 1.0);
 621   }
 622   else { // non-rational B-spline
 623     aWeightsAttr->setSize((int)aWeights.size());
 624     std::list<double>::iterator anIt = aWeights.begin();
 625     for (int anIndex = 0; anIt != aWeights.end(); ++anIt, ++anIndex)
 626       aWeightsAttr->setValue(anIndex, *anIt);
 627   }
 628
 629   AttributeDoubleArrayPtr aKnotsAttr =
 630       theResult->data()->realArray(SketchPlugin_BSpline::KNOTS_ID());
 631   std::list<double> aKnots = aBSpline->knots();
 632   int aSize = (int)aKnots.size();
 633   aKnotsAttr->setSize(aSize);
 634   std::list<double>::iterator aKIt = aKnots.begin();
 635   for (int index = 0; index < aSize; ++index, ++aKIt)
 636     aKnotsAttr->setValue(index, *aKIt);
 637
 638   AttributeIntArrayPtr aMultsAttr =
 639       theResult->data()->intArray(SketchPlugin_BSpline::MULTS_ID());
 640   std::list<int> aMultiplicities = aBSpline->mults();
 641   aSize = (int)aMultiplicities.size();
 642   aMultsAttr->setSize(aSize);
 643   std::list<int>::iterator aMIt = aMultiplicities.begin();
 644   for (int index = 0; index < aSize; ++index, ++aMIt)
 645     aMultsAttr->setValue(index, *aMIt);
 646 }
 647
 648 void SketchPlugin_Offset::attributeChanged(const std::string& theID)
 649 {
 650 ////  if (theID == EDGES_ID())
 651 ////    removeCreated();
 652 }
 653
 654 bool SketchPlugin_Offset::customAction(const std::string& theActionId)
 655 {
 656   bool isOk = false;
 657   if (theActionId == ADD_WIRE_ACTION_ID()) {
 658     isOk = findWires();
 659   }
 660   else {
 661     std::string aMsg = "Error: Feature \"%1\" does not support action \"%2\".";
 662     Events_InfoMessage("SketchPlugin_Offset", aMsg).arg(getKind()).arg(theActionId).send();
 663   }
 664   return isOk;
 665 }
 666
 667 bool SketchPlugin_Offset::findWires()
 668 {
 669   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 670   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 671
 672   // Empty set
 673   std::set<FeaturePtr> anEdgesSet;
 674
 675   // Processed set
 676   std::set<FeaturePtr> aProcessedEdgesSet;
 677
 678   // Put all selected edges in a set to avoid adding them in reflist(EDGES_ID())
 679   std::set<FeaturePtr> aSelectedSet;
 680   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 681   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 682     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 683     if (aFeature) {
 684       aSelectedSet.insert(aFeature);
 685     }
 686   }
 687
 688   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 689
 690   // Gather chains of edges
 691   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 692     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 693     if (aFeature.get()) {
 694       if (aProcessedEdgesSet.find(aFeature) != aProcessedEdgesSet.end())
 695         continue;
 696       aProcessedEdgesSet.insert(aFeature);
 697
 698       // End points (if any)
 699       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 700       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 701
 702       std::list<FeaturePtr> aChain;
 703       aChain.push_back(aFeature);
 704       bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet, aProcessedEdgesSet, aChain, true);
 705       if (!isClosed)
 706         findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet, aProcessedEdgesSet, aChain, false);
 707
 708       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 709       for (; aChainIt != aChain.end(); ++aChainIt) {
 710         FeaturePtr aChainFeature = (*aChainIt);
 711         if (aSelectedSet.find(aChainFeature) == aSelectedSet.end()) {
 712           aSelectedEdges->append(aChainFeature->lastResult());
 713         }
 714       }
 715     }
 716   }
 717   // TODO: hilight selection in the viewer
 718
 719   data()->blockSendAttributeUpdated(aWasBlocked);
 720   return true;
 721 }
 722
 723
 724 AISObjectPtr SketchPlugin_Offset::getAISObject(AISObjectPtr thePrevious)
 725 {
 726   if (!sketch())
 727     return thePrevious;
 728
 729   AISObjectPtr anAIS = SketcherPrs_Factory::offsetObject(this, sketch(),
 730     thePrevious);
 731   return anAIS;
 732 }