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 #include <iostream>
  65
  66 static const double tolerance = 1.e-7;
  67
  68 SketchPlugin_Offset::SketchPlugin_Offset()
  69 {
  70 }
  71
  72 void SketchPlugin_Offset::initAttributes()
  73 {
  74   data()->addAttribute(EDGES_ID(), ModelAPI_AttributeRefList::typeId());
  75   data()->addAttribute(VALUE_ID(), ModelAPI_AttributeDouble::typeId());
  76   data()->addAttribute(REVERSED_ID(), ModelAPI_AttributeBoolean::typeId());
  77
  78   // store original entities
  79   data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(), ModelAPI_AttributeRefList::typeId());
  80   // store offset entities
  81   data()->addAttribute(SketchPlugin_Constraint::ENTITY_B(), ModelAPI_AttributeRefList::typeId());
  82   // store mapping between original entity and index of the corresponding offset entity
  83   data()->addAttribute(SketchPlugin_Constraint::ENTITY_C(), ModelAPI_AttributeIntArray::typeId());
  84
  85   ModelAPI_Session::get()->validators()->
  86       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_A());
  87   ModelAPI_Session::get()->validators()->
  88       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_B());
  89   ModelAPI_Session::get()->validators()->
  90       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_C());
  91 }
  92
  93 void SketchPlugin_Offset::execute()
  94 {
  95   SketchPlugin_Sketch* aSketch = sketch();
  96   if (!aSketch) return;
  97
  98   // 1. Sketch plane
  99   std::shared_ptr<GeomAPI_Pln> aPlane = aSketch->plane();
 100
 101   // 2. Offset value
 102   AttributeDoublePtr aValueAttr = real(VALUE_ID());
 103   if (!aValueAttr->isInitialized()) return;
 104   double aValue = aValueAttr->value();
 105   if (aValue < tolerance) return;
 106
 107   // 2.a. Reversed?
 108   AttributeBooleanPtr aReversedAttr = boolean(REVERSED_ID());
 109   if (!aReversedAttr->isInitialized()) return;
 110   if (aReversedAttr->value()) aValue = -aValue; // reverse offset direction
 111
 112   // 3. List of all selected edges
 113   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 114   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 115
 116   // 4. Put all selected edges in a set to pass them into findWireOneWay() below
 117   std::set<FeaturePtr> anEdgesSet;
 118   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 119   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 120     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 121     if (aFeature) {
 122       anEdgesSet.insert(aFeature);
 123     }
 124   }
 125
 126   // Wait all objects being created, then send update events
 127   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 128   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
 129   if (isUpdateFlushed)
 130     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
 131
 132   // 5. Gather wires and make offset for each wire
 133   ListOfMakeShape anOffsetAlgos;
 134   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 135     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 136     if (aFeature.get()) {
 137       if (anEdgesSet.find(aFeature) == anEdgesSet.end())
 138         continue;
 139
 140       // 5.a. End points (if any)
 141       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 142       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 143
 144       // 5.b. Find a chain of edges
 145       std::list<FeaturePtr> aChain;
 146       aChain.push_back(aFeature);
 147       if (aStartPoint && anEndPoint) { // not closed edge
 148         bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet, aChain, true);
 149         if (!isClosed)
 150           findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet, aChain, false);
 151       }
 152       std::set<FeaturePtr>::iterator aPos = anEdgesSet.find(aFeature);
 153       if (aPos != anEdgesSet.end())
 154         anEdgesSet.erase(aPos);
 155
 156       // 5.c. Make wire
 157       ListOfShape aTopoChain;
 158       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 159       for (; aChainIt != aChain.end(); ++aChainIt) {
 160         FeaturePtr aChainFeature = (*aChainIt);
 161         GeomShapePtr aTopoEdge = aChainFeature->lastResult()->shape();
 162         if (aTopoEdge->shapeType() == GeomAPI_Shape::EDGE) {
 163           aTopoChain.push_back(aTopoEdge);
 164         }
 165       }
 166       std::shared_ptr<GeomAlgoAPI_WireBuilder> aWireBuilder(
 167           new GeomAlgoAPI_WireBuilder(aTopoChain));
 168
 169       GeomShapePtr aWireShape = aWireBuilder->shape();
 170       GeomWirePtr aWire (new GeomAPI_Wire (aWireShape));
 171
 172       // Fix for a problem of offset side change with selection change.
 173       // Wire direction is defined by the first selected edge of this wire.
 174       if (!aWire->isClosed()) {
 175         ListOfShape aModified;
 176         // First selected edge of current chain
 177         GeomShapePtr aFirstSel = aFeature->lastResult()->shape();
 178         aWireBuilder->modified(aFirstSel, aModified);
 179         GeomShapePtr aModFS = aModified.front();
 180         if (aModFS->orientation() != aFirstSel->orientation())
 181           aValue = -aValue;
 182       }
 183
 184       // 5.d. Make offset for the wire
 185       std::shared_ptr<GeomAlgoAPI_Offset> anOffsetShape(
 186           new GeomAlgoAPI_Offset(aPlane, aWireShape, aValue));
 187
 188       std::shared_ptr<GeomAlgoAPI_MakeShapeList> aMakeList(new GeomAlgoAPI_MakeShapeList);
 189       aMakeList->appendAlgo(aWireBuilder);
 190       aMakeList->appendAlgo(anOffsetShape);
 191       anOffsetAlgos.push_back(aMakeList);
 192     }
 193   }
 194
 195   // 6. Store offset results.
 196   //    Create sketch feature for each edge of anOffsetShape, and also store
 197   //    created features in CREATED_ID() to remove them on next execute()
 198   addToSketch(anOffsetAlgos);
 199
 200   // send events to update the sub-features by the solver
 201   if (isUpdateFlushed)
 202     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 203 }
 204
 205 bool SketchPlugin_Offset::findWireOneWay (const FeaturePtr& theFirstEdge,
 206                                           const FeaturePtr& theEdge,
 207                                           const std::shared_ptr<GeomDataAPI_Point2D>& theEndPoint,
 208                                           std::set<FeaturePtr>& theEdgesSet,
 209                                           std::list<FeaturePtr>& theChain,
 210                                           const bool isPrepend)
 211 {
 212   // 1. Find a single edge, coincident to theEndPoint by one of its ends
 213   if (!theEndPoint) return false;
 214
 215   FeaturePtr aNextEdgeFeature;
 216   int nbFound = 0;
 217
 218   std::set<AttributePoint2DPtr> aCoincPoints;
 219   std::map<AttributePoint2DArrayPtr, int> aCoincPointsInArray;
 220   SketchPlugin_Tools::findPointsCoincidentToPoint(theEndPoint, aCoincPoints, aCoincPointsInArray);
 221
 222   // store all found attributes to a single array
 223   std::set<AttributePtr> anAllCoincPoints;
 224   anAllCoincPoints.insert(aCoincPoints.begin(), aCoincPoints.end());
 225   for (auto it = aCoincPointsInArray.begin(); it != aCoincPointsInArray.end(); ++it)
 226     anAllCoincPoints.insert(it->first);
 227
 228   std::set<AttributePtr>::iterator aPointsIt = anAllCoincPoints.begin();
 229   for (; aPointsIt != anAllCoincPoints.end(); aPointsIt++) {
 230     AttributePtr aP = (*aPointsIt);
 231     FeaturePtr aCoincFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aP->owner());
 232     bool isInSet = (theEdgesSet.find(aCoincFeature) != theEdgesSet.end());
 233
 234     // Condition 0: not auxiliary
 235     if (!isInSet && aCoincFeature->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value())
 236       continue;
 237
 238     // Condition 1: not a point feature
 239     if (aCoincFeature->getKind() != SketchPlugin_Point::ID()) {
 240       // Condition 2: it is not the current edge
 241       if (aCoincFeature != theEdge) {
 242         // Condition 3: it is in the set of interest.
 243         //              Empty set means all sketch edges.
 244         if (isInSet || theEdgesSet.empty()) {
 245           // Condition 4: consider only features with two end points
 246           std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 247           SketchPlugin_SegmentationTools::getFeaturePoints(aCoincFeature, aP1, aP2);
 248           if (aP1 && aP2) {
 249             // Condition 5: consider only features, that have aP as one of they ends.
 250             //              For example, we do not need an arc, coincident to aP by its center.
 251             if (theEndPoint->pnt()->isEqual(aP1->pnt()) ||
 252                 theEndPoint->pnt()->isEqual(aP2->pnt())) {
 253               // Condition 6: only one edge can prolongate the chain. If several, we stop here.
 254               nbFound++;
 255               if (nbFound > 1)
 256                 return false;
 257
 258               // One found
 259               aNextEdgeFeature = aCoincFeature;
 260             }
 261           }
 262         }
 263       }
 264     }
 265   }
 266
 267   // Only one edge can prolongate the chain. If several or none, we stop here.
 268   if (nbFound != 1)
 269     return false;
 270
 271   // 2. So, we have the single edge, that prolongate the chain
 272
 273   // Condition 7: if we reached the very first edge of the chain
 274   if (aNextEdgeFeature == theFirstEdge)
 275     // Closed chain found
 276     return true;
 277
 278   // 3. Add the found edge to the chain
 279   if (isPrepend)
 280     theChain.push_front(aNextEdgeFeature);
 281   else
 282     theChain.push_back(aNextEdgeFeature);
 283   // remove from the set, if the set is used
 284   if (theEdgesSet.size()) {
 285     std::set<FeaturePtr>::iterator aPos = theEdgesSet.find(aNextEdgeFeature);
 286     if (aPos != theEdgesSet.end())
 287       theEdgesSet.erase(aPos);
 288   }
 289
 290   // 4. Which end of aNextEdgeFeature we need to proceed
 291   std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 292   SketchPlugin_SegmentationTools::getFeaturePoints(aNextEdgeFeature, aP1, aP2);
 293   if (aP2->pnt()->isEqual(theEndPoint->pnt())) {
 294     // reversed
 295     aP2 = aP1;
 296   }
 297
 298   // 5. Continue gathering the chain (recursive)
 299   return findWireOneWay (theFirstEdge, aNextEdgeFeature, aP2, theEdgesSet, theChain, isPrepend);
 300 }
 301
 302 static void setRefListValue(AttributeRefListPtr theList, int theListSize,
 303                             ObjectPtr theValue, int theIndex)
 304 {
 305   if (theIndex < theListSize) {
 306     ObjectPtr aCur = theList->object(theIndex);
 307     if (aCur != theValue)
 308       theList->substitute(aCur, theValue);
 309   }
 310   else
 311     theList->append(theValue);
 312 }
 313
 314 // Reorder shapes according to the wire's order
 315 static void reorderShapes(ListOfShape& theShapes, GeomShapePtr theWire)
 316 {
 317   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aShapes;
 318   aShapes.insert(theShapes.begin(), theShapes.end());
 319   theShapes.clear();
 320
 321   GeomWirePtr aWire(new GeomAPI_Wire(theWire));
 322   GeomAPI_WireExplorer anExp(aWire);
 323   for (; anExp.more(); anExp.next()) {
 324     GeomShapePtr aCurEdge = anExp.current();
 325     auto aFound = aShapes.find(aCurEdge);
 326     if (aFound != aShapes.end()) {
 327       theShapes.push_back(aCurEdge);
 328       aShapes.erase(aFound);
 329     }
 330   }
 331 }
 332
 333 static void removeLastFromIndex(AttributeRefListPtr theList, int theListSize, int& theLastIndex)
 334 {
 335   if (theLastIndex < theListSize) {
 336     std::set<int> anIndicesToRemove;
 337     for (; theLastIndex < theListSize; ++theLastIndex)
 338       anIndicesToRemove.insert(theLastIndex);
 339     theList->remove(anIndicesToRemove);
 340   }
 341 }
 342
 343 void SketchPlugin_Offset::addToSketch(const ListOfMakeShape& theOffsetAlgos)
 344 {
 345   AttributeRefListPtr aSelectedRefList = reflist(EDGES_ID());
 346   AttributeRefListPtr aBaseRefList = reflist(ENTITY_A());
 347   AttributeRefListPtr anOffsetRefList = reflist(ENTITY_B());
 348   AttributeIntArrayPtr anOffsetToBaseMap = intArray(ENTITY_C());
 349
 350   // compare the list of selected edges and the previously stored,
 351   // and store maping between them
 352   std::map<ObjectPtr, std::list<ObjectPtr> > aMapExistent;
 353   std::list<ObjectPtr> anObjectsToRemove;
 354   std::list<ObjectPtr> aSelectedList = aSelectedRefList->list();
 355   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 356        aSIt != aSelectedList.end(); ++aSIt) {
 357     aMapExistent[*aSIt] = std::list<ObjectPtr>();
 358   }
 359   for (int anIndex = 0, aSize = anOffsetRefList->size(); anIndex < aSize; ++anIndex) {
 360     ObjectPtr aCurrent = anOffsetRefList->object(anIndex);
 361     int aBaseIndex = anOffsetToBaseMap->value(anIndex);
 362     if (aBaseIndex >= 0) {
 363       ObjectPtr aBaseObj = aBaseRefList->object(aBaseIndex);
 364       std::map<ObjectPtr, std::list<ObjectPtr> >::iterator aFound = aMapExistent.find(aBaseObj);
 365       if (aFound != aMapExistent.end())
 366         aFound->second.push_back(aCurrent);
 367       else
 368         anObjectsToRemove.push_back(aCurrent);
 369     }
 370     else
 371       anObjectsToRemove.push_back(aCurrent);
 372   }
 373
 374   // update lists of base shapes and of offset shapes
 375   int aBaseListSize = aBaseRefList->size();
 376   int anOffsetListSize = anOffsetRefList->size();
 377   int aBaseListIndex = 0, anOffsetListIndex = 0;
 378   std::list<int> anOffsetBaseBackRefs;
 379   std::set<GeomShapePtr, GeomAPI_Shape::ComparatorWithOri> aProcessedOffsets;
 380   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 381        aSIt != aSelectedList.end(); ++aSIt) {
 382     // find an offseted edge
 383     FeaturePtr aBaseFeature = ModelAPI_Feature::feature(*aSIt);
 384     GeomShapePtr aBaseShape = aBaseFeature->lastResult()->shape();
 385     ListOfShape aNewShapes;
 386     for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 387          anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 388       (*anAlgoIt)->generated(aBaseShape, aNewShapes);
 389       if (!aNewShapes.empty()) {
 390         reorderShapes(aNewShapes, (*anAlgoIt)->shape());
 391         break;
 392       }
 393     }
 394
 395     // store base feature
 396     setRefListValue(aBaseRefList, aBaseListSize, *aSIt, aBaseListIndex);
 397
 398     // create or update an offseted feature
 399     const std::list<ObjectPtr>& anImages = aMapExistent[*aSIt];
 400     std::list<ObjectPtr>::const_iterator anImgIt = anImages.begin();
 401     for (ListOfShape::iterator aNewIt = aNewShapes.begin(); aNewIt != aNewShapes.end(); ++aNewIt) {
 402       FeaturePtr aNewFeature;
 403       if (anImgIt != anImages.end())
 404         aNewFeature = ModelAPI_Feature::feature(*anImgIt++);
 405       updateExistentOrCreateNew(*aNewIt, aNewFeature, anObjectsToRemove);
 406       aProcessedOffsets.insert(*aNewIt);
 407
 408       // store an offseted feature
 409       setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 410
 411       anOffsetBaseBackRefs.push_back(aBaseListIndex);
 412       ++anOffsetListIndex;
 413     }
 414     ++aBaseListIndex;
 415     anObjectsToRemove.insert(anObjectsToRemove.end(), anImgIt, anImages.end());
 416   }
 417   // create arcs generated from vertices
 418   for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 419        anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 420     GeomShapePtr aCurWire = (*anAlgoIt)->shape();
 421     GeomAPI_ShapeExplorer anExp(aCurWire, GeomAPI_Shape::EDGE);
 422     for (; anExp.more(); anExp.next()) {
 423       GeomShapePtr aCurEdge = anExp.current();
 424       if (aProcessedOffsets.find(aCurEdge) == aProcessedOffsets.end()) {
 425         FeaturePtr aNewFeature;
 426         updateExistentOrCreateNew(aCurEdge, aNewFeature, anObjectsToRemove);
 427         aProcessedOffsets.insert(aCurEdge);
 428
 429         // store an offseted feature
 430         setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 431
 432         anOffsetBaseBackRefs.push_back(-1);
 433         ++anOffsetListIndex;
 434       }
 435     }
 436   }
 437
 438   removeLastFromIndex(aBaseRefList, aBaseListSize, aBaseListIndex);
 439   removeLastFromIndex(anOffsetRefList, anOffsetListSize, anOffsetListIndex);
 440
 441   anOffsetToBaseMap->setSize((int)anOffsetBaseBackRefs.size(), false);
 442   int anIndex = 0;
 443   for (std::list<int>::iterator anIt = anOffsetBaseBackRefs.begin();
 444        anIt != anOffsetBaseBackRefs.end(); ++anIt) {
 445     anOffsetToBaseMap->setValue(anIndex++, *anIt, false);
 446   }
 447
 448   // remove unused objects
 449   std::set<FeaturePtr> aSet;
 450   for (std::list<ObjectPtr>::iterator anIt = anObjectsToRemove.begin();
 451        anIt != anObjectsToRemove.end(); ++anIt) {
 452     FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 453     if (aFeature)
 454       aSet.insert(aFeature);
 455   }
 456   ModelAPI_Tools::removeFeaturesAndReferences(aSet);
 457 }
 458
 459 static void findOrCreateFeatureByKind(SketchPlugin_Sketch* theSketch,
 460                                       const std::string& theFeatureKind,
 461                                       FeaturePtr& theFeature,
 462                                       std::list<ObjectPtr>& thePoolOfFeatures)
 463 {
 464   if (theFeature) {
 465     // check the feature type is the same as required
 466     if (theFeature->getKind() != theFeatureKind) {
 467       // return feature to the pool and try to find the most appropriate
 468       thePoolOfFeatures.push_back(theFeature);
 469       theFeature = FeaturePtr();
 470     }
 471   }
 472   if (!theFeature) {
 473     // try to find appropriate feature in the pool
 474     for (std::list<ObjectPtr>::iterator it = thePoolOfFeatures.begin();
 475          it != thePoolOfFeatures.end(); ++it) {
 476       FeaturePtr aCurFeature = ModelAPI_Feature::feature(*it);
 477       if (aCurFeature->getKind() == theFeatureKind) {
 478         theFeature = aCurFeature;
 479         thePoolOfFeatures.erase(it);
 480         break;
 481       }
 482     }
 483     // feature not found, create new
 484     if (!theFeature)
 485       theFeature = theSketch->addFeature(theFeatureKind);
 486   }
 487 }
 488
 489 void SketchPlugin_Offset::updateExistentOrCreateNew(const GeomShapePtr& theShape,
 490                                                     FeaturePtr& theFeature,
 491                                                     std::list<ObjectPtr>& thePoolOfFeatures)
 492 {
 493   if (theShape->shapeType() != GeomAPI_Shape::EDGE)
 494     return;
 495
 496   std::shared_ptr<GeomAPI_Edge> aResEdge(new GeomAPI_Edge(theShape));
 497
 498   std::shared_ptr<GeomAPI_Pnt2d> aFP, aLP;
 499   std::shared_ptr<GeomAPI_Pnt> aFP3d = aResEdge->firstPoint();
 500   std::shared_ptr<GeomAPI_Pnt> aLP3d = aResEdge->lastPoint();
 501   if (aFP3d && aLP3d) {
 502     aFP = sketch()->to2D(aFP3d);
 503     aLP = sketch()->to2D(aLP3d);
 504   }
 505
 506   if (aResEdge->isLine()) {
 507     findOrCreateFeatureByKind(sketch(), SketchPlugin_Line::ID(), theFeature, thePoolOfFeatures);
 508
 509     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 510       (theFeature->attribute(SketchPlugin_Line::START_ID()))->setValue(aFP);
 511     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 512       (theFeature->attribute(SketchPlugin_Line::END_ID()))->setValue(aLP);
 513   }
 514   else if (aResEdge->isArc()) {
 515     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 516     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 517     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 518
 519     findOrCreateFeatureByKind(sketch(), SketchPlugin_Arc::ID(), theFeature, thePoolOfFeatures);
 520
 521     GeomDirPtr aCircNormal = aCircEdge->normal();
 522     GeomDirPtr aSketchNormal = sketch()->coordinatePlane()->normal();
 523     if (aSketchNormal->dot(aCircNormal) < -tolerance)
 524       std::swap(aFP, aLP);
 525
 526     bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 527     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 528       (theFeature->attribute(SketchPlugin_Arc::END_ID()))->setValue(aLP);
 529     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 530       (theFeature->attribute(SketchPlugin_Arc::START_ID()))->setValue(aFP);
 531     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 532       (theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCP);
 533     theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 534   }
 535   else if (aResEdge->isCircle()) {
 536     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 537     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 538     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 539
 540     findOrCreateFeatureByKind(sketch(), SketchPlugin_Circle::ID(), theFeature, thePoolOfFeatures);
 541
 542     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 543       (theFeature->attribute(SketchPlugin_Circle::CENTER_ID()))->setValue(aCP);
 544     theFeature->real(SketchPlugin_Circle::RADIUS_ID())->setValue(aCircEdge->radius());
 545   }
 546   else if (aResEdge->isEllipse()) {
 547     std::shared_ptr<GeomAPI_Ellipse> anEllipseEdge = aResEdge->ellipse();
 548
 549     GeomPointPtr aCP3d = anEllipseEdge->center();
 550     GeomPnt2dPtr aCP = sketch()->to2D(aCP3d);
 551
 552     GeomPointPtr aFocus3d = anEllipseEdge->firstFocus();
 553     GeomPnt2dPtr aFocus = sketch()->to2D(aFocus3d);
 554
 555     if (aFP3d && aLP3d) {
 556       // Elliptic arc
 557       findOrCreateFeatureByKind(sketch(), SketchPlugin_EllipticArc::ID(),
 558                                 theFeature, thePoolOfFeatures);
 559
 560       bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 561       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 562         (theFeature->attribute(SketchPlugin_EllipticArc::CENTER_ID()))->setValue(aCP);
 563       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 564         (theFeature->attribute(SketchPlugin_EllipticArc::FIRST_FOCUS_ID()))->setValue(aFocus);
 565       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 566         (theFeature->attribute(SketchPlugin_EllipticArc::START_POINT_ID()))->setValue(aFP);
 567       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 568         (theFeature->attribute(SketchPlugin_EllipticArc::END_POINT_ID()))->setValue(aLP);
 569       theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 570     }
 571     else {
 572       // Ellipse
 573       findOrCreateFeatureByKind(sketch(), SketchPlugin_Ellipse::ID(),
 574                                 theFeature, thePoolOfFeatures);
 575
 576       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 577         (theFeature->attribute(SketchPlugin_Ellipse::CENTER_ID()))->setValue(aCP);
 578       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 579         (theFeature->attribute(SketchPlugin_Ellipse::FIRST_FOCUS_ID()))->setValue(aFocus);
 580       theFeature->real(SketchPlugin_Ellipse::MINOR_RADIUS_ID())->setValue(
 581         anEllipseEdge->minorRadius());
 582     }
 583   }
 584   else {
 585     // convert to b-spline
 586     mkBSpline(theFeature, aResEdge, thePoolOfFeatures);
 587   }
 588
 589   if (theFeature.get()) {
 590     theFeature->boolean(SketchPlugin_SketchEntity::COPY_ID())->setValue(true);
 591     theFeature->execute();
 592
 593     static Events_ID aRedisplayEvent = Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY);
 594     ModelAPI_EventCreator::get()->sendUpdated(theFeature, aRedisplayEvent);
 595     const std::list<ResultPtr>& aResults = theFeature->results();
 596     for (std::list<ResultPtr>::const_iterator anIt = aResults.begin();
 597          anIt != aResults.end(); ++anIt)
 598       ModelAPI_EventCreator::get()->sendUpdated(*anIt, aRedisplayEvent);
 599   }
 600 }
 601
 602 void SketchPlugin_Offset::mkBSpline (FeaturePtr& theResult,
 603                                      const GeomEdgePtr& theEdge,
 604                                      std::list<ObjectPtr>& thePoolOfFeatures)
 605 {
 606   GeomCurvePtr aCurve (new GeomAPI_Curve (theEdge));
 607   // Forced conversion to b-spline, if aCurve is not b-spline
 608   GeomBSplinePtr aBSpline = GeomAPI_BSpline::convertToBSpline(aCurve);
 609
 610   const std::string& aBSplineKind = aBSpline->isPeriodic() ? SketchPlugin_BSplinePeriodic::ID()
 611                                                            : SketchPlugin_BSpline::ID();
 612   findOrCreateFeatureByKind(sketch(), aBSplineKind, theResult, thePoolOfFeatures);
 613
 614   theResult->integer(SketchPlugin_BSpline::DEGREE_ID())->setValue(aBSpline->degree());
 615
 616   AttributePoint2DArrayPtr aPolesAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2DArray>
 617     (theResult->attribute(SketchPlugin_BSpline::POLES_ID()));
 618   std::list<GeomPointPtr> aPoles = aBSpline->poles();
 619   aPolesAttr->setSize((int)aPoles.size());
 620   std::list<GeomPointPtr>::iterator anIt = aPoles.begin();
 621   for (int anIndex = 0; anIt != aPoles.end(); ++anIt, ++anIndex) {
 622     GeomPnt2dPtr aPoleInSketch = sketch()->to2D(*anIt);
 623     aPolesAttr->setPnt(anIndex, aPoleInSketch);
 624   }
 625
 626   AttributeDoubleArrayPtr aWeightsAttr =
 627       theResult->data()->realArray(SketchPlugin_BSpline::WEIGHTS_ID());
 628   std::list<double> aWeights = aBSpline->weights();
 629   if (aWeights.empty()) { // rational B-spline
 630     int aSize = (int)aPoles.size();
 631     aWeightsAttr->setSize(aSize);
 632     for (int anIndex = 0; anIndex < aSize; ++anIndex)
 633       aWeightsAttr->setValue(anIndex, 1.0);
 634   }
 635   else { // non-rational B-spline
 636     aWeightsAttr->setSize((int)aWeights.size());
 637     std::list<double>::iterator anIt = aWeights.begin();
 638     for (int anIndex = 0; anIt != aWeights.end(); ++anIt, ++anIndex)
 639       aWeightsAttr->setValue(anIndex, *anIt);
 640   }
 641
 642   AttributeDoubleArrayPtr aKnotsAttr =
 643       theResult->data()->realArray(SketchPlugin_BSpline::KNOTS_ID());
 644   std::list<double> aKnots = aBSpline->knots();
 645   int aSize = (int)aKnots.size();
 646   aKnotsAttr->setSize(aSize);
 647   std::list<double>::iterator aKIt = aKnots.begin();
 648   for (int index = 0; index < aSize; ++index, ++aKIt)
 649     aKnotsAttr->setValue(index, *aKIt);
 650
 651   AttributeIntArrayPtr aMultsAttr =
 652       theResult->data()->intArray(SketchPlugin_BSpline::MULTS_ID());
 653   std::list<int> aMultiplicities = aBSpline->mults();
 654   aSize = (int)aMultiplicities.size();
 655   aMultsAttr->setSize(aSize);
 656   std::list<int>::iterator aMIt = aMultiplicities.begin();
 657   for (int index = 0; index < aSize; ++index, ++aMIt)
 658     aMultsAttr->setValue(index, *aMIt);
 659 }
 660
 661 void SketchPlugin_Offset::attributeChanged(const std::string& theID)
 662 {
 663 ////  if (theID == EDGES_ID())
 664 ////    removeCreated();
 665 }
 666
 667 bool SketchPlugin_Offset::customAction(const std::string& theActionId)
 668 {
 669   bool isOk = false;
 670   if (theActionId == ADD_WIRE_ACTION_ID()) {
 671     isOk = findWires();
 672   }
 673   else {
 674     std::string aMsg = "Error: Feature \"%1\" does not support action \"%2\".";
 675     Events_InfoMessage("SketchPlugin_Offset", aMsg).arg(getKind()).arg(theActionId).send();
 676   }
 677   return isOk;
 678 }
 679
 680 bool SketchPlugin_Offset::findWires()
 681 {
 682   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 683   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 684
 685   // Empty set
 686   std::set<FeaturePtr> anEdgesSet;
 687
 688   // Processed set
 689   std::set<FeaturePtr> aProcessedSet;
 690
 691   // Put all selected edges in a set to avoid adding them in reflist(EDGES_ID())
 692   std::set<FeaturePtr> aSelectedSet;
 693   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 694   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 695     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 696     if (aFeature) {
 697       aSelectedSet.insert(aFeature);
 698     }
 699   }
 700
 701   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 702
 703   // Gather chains of edges
 704   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 705     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 706     if (aFeature.get()) {
 707       if (aProcessedSet.find(aFeature) != aProcessedSet.end())
 708         continue;
 709       aProcessedSet.insert(aFeature);
 710
 711       // End points (if any)
 712       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 713       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 714
 715       std::list<FeaturePtr> aChain;
 716       aChain.push_back(aFeature);
 717       bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet, aChain, true);
 718       if (!isClosed)
 719         findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet, aChain, false);
 720
 721       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 722       for (; aChainIt != aChain.end(); ++aChainIt) {
 723         FeaturePtr aChainFeature = (*aChainIt);
 724         aProcessedSet.insert(aChainFeature);
 725         if (aSelectedSet.find(aChainFeature) == aSelectedSet.end()) {
 726           aSelectedEdges->append(aChainFeature->lastResult());
 727         }
 728       }
 729     }
 730   }
 731   // TODO: hilight selection in the viewer
 732
 733   data()->blockSendAttributeUpdated(aWasBlocked);
 734   return true;
 735 }
 736
 737
 738 AISObjectPtr SketchPlugin_Offset::getAISObject(AISObjectPtr thePrevious)
 739 {
 740   if (!sketch())
 741     return thePrevious;
 742
 743   AISObjectPtr anAIS = SketcherPrs_Factory::offsetObject(this, sketch(),
 744     thePrevious);
 745   return anAIS;
 746 }