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       SketchPlugin_Tools::findPointsCoincidentToPoint(theEndPoint);
 220
 221   std::set<AttributePoint2DPtr>::iterator aPointsIt = aCoincPoints.begin();
 222   for (; aPointsIt != aCoincPoints.end(); aPointsIt++) {
 223     AttributePoint2DPtr aP = (*aPointsIt);
 224     FeaturePtr aCoincFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aP->owner());
 225     bool isInSet = (theEdgesSet.find(aCoincFeature) != theEdgesSet.end());
 226
 227     // Condition 0: not auxiliary
 228     if (!isInSet && aCoincFeature->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value())
 229       continue;
 230
 231     // Condition 1: not a point feature
 232     if (aCoincFeature->getKind() != SketchPlugin_Point::ID()) {
 233       // Condition 2: it is not the current edge
 234       if (aCoincFeature != theEdge) {
 235         // Condition 3: it is in the set of interest.
 236         //              Empty set means all sketch edges.
 237         if (isInSet || theEdgesSet.empty()) {
 238           // Condition 4: consider only features with two end points
 239           std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 240           SketchPlugin_SegmentationTools::getFeaturePoints(aCoincFeature, aP1, aP2);
 241           if (aP1 && aP2) {
 242             // Condition 5: consider only features, that have aP as one of they ends.
 243             //              For example, we do not need an arc, coincident to aP by its center.
 244             if (theEndPoint->pnt()->isEqual(aP1->pnt()) ||
 245                 theEndPoint->pnt()->isEqual(aP2->pnt())) {
 246               // Condition 6: only one edge can prolongate the chain. If several, we stop here.
 247               nbFound++;
 248               if (nbFound > 1)
 249                 return false;
 250
 251               // One found
 252               aNextEdgeFeature = aCoincFeature;
 253             }
 254           }
 255         }
 256       }
 257     }
 258   }
 259
 260   // Only one edge can prolongate the chain. If several or none, we stop here.
 261   if (nbFound != 1)
 262     return false;
 263
 264   // 2. So, we have the single edge, that prolongate the chain
 265
 266   // Condition 7: if we reached the very first edge of the chain
 267   if (aNextEdgeFeature == theFirstEdge)
 268     // Closed chain found
 269     return true;
 270
 271   // 3. Add the found edge to the chain
 272   if (isPrepend)
 273     theChain.push_front(aNextEdgeFeature);
 274   else
 275     theChain.push_back(aNextEdgeFeature);
 276   // remove from the set, if the set is used
 277   if (theEdgesSet.size()) {
 278     std::set<FeaturePtr>::iterator aPos = theEdgesSet.find(aNextEdgeFeature);
 279     if (aPos != theEdgesSet.end())
 280       theEdgesSet.erase(aPos);
 281   }
 282
 283   // 4. Which end of aNextEdgeFeature we need to proceed
 284   std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 285   SketchPlugin_SegmentationTools::getFeaturePoints(aNextEdgeFeature, aP1, aP2);
 286   if (aP2->pnt()->isEqual(theEndPoint->pnt())) {
 287     // reversed
 288     aP2 = aP1;
 289   }
 290
 291   // 5. Continue gathering the chain (recursive)
 292   return findWireOneWay (theFirstEdge, aNextEdgeFeature, aP2, theEdgesSet, theChain, isPrepend);
 293 }
 294
 295 static void setRefListValue(AttributeRefListPtr theList, int theListSize,
 296                             ObjectPtr theValue, int theIndex)
 297 {
 298   if (theIndex < theListSize) {
 299     ObjectPtr aCur = theList->object(theIndex);
 300     if (aCur != theValue)
 301       theList->substitute(aCur, theValue);
 302   }
 303   else
 304     theList->append(theValue);
 305 }
 306
 307 // Reorder shapes according to the wire's order
 308 static void reorderShapes(ListOfShape& theShapes, GeomShapePtr theWire)
 309 {
 310   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aShapes;
 311   aShapes.insert(theShapes.begin(), theShapes.end());
 312   theShapes.clear();
 313
 314   GeomWirePtr aWire(new GeomAPI_Wire(theWire));
 315   GeomAPI_WireExplorer anExp(aWire);
 316   for (; anExp.more(); anExp.next()) {
 317     GeomShapePtr aCurEdge = anExp.current();
 318     auto aFound = aShapes.find(aCurEdge);
 319     if (aFound != aShapes.end()) {
 320       theShapes.push_back(aCurEdge);
 321       aShapes.erase(aFound);
 322     }
 323   }
 324 }
 325
 326 static void removeLastFromIndex(AttributeRefListPtr theList, int theListSize, int& theLastIndex)
 327 {
 328   if (theLastIndex < theListSize) {
 329     std::set<int> anIndicesToRemove;
 330     for (; theLastIndex < theListSize; ++theLastIndex)
 331       anIndicesToRemove.insert(theLastIndex);
 332     theList->remove(anIndicesToRemove);
 333   }
 334 }
 335
 336 void SketchPlugin_Offset::addToSketch(const ListOfMakeShape& theOffsetAlgos)
 337 {
 338   AttributeRefListPtr aSelectedRefList = reflist(EDGES_ID());
 339   AttributeRefListPtr aBaseRefList = reflist(ENTITY_A());
 340   AttributeRefListPtr anOffsetRefList = reflist(ENTITY_B());
 341   AttributeIntArrayPtr anOffsetToBaseMap = intArray(ENTITY_C());
 342
 343   // compare the list of selected edges and the previously stored,
 344   // and store maping between them
 345   std::map<ObjectPtr, std::list<ObjectPtr> > aMapExistent;
 346   std::list<ObjectPtr> anObjectsToRemove;
 347   std::list<ObjectPtr> aSelectedList = aSelectedRefList->list();
 348   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 349        aSIt != aSelectedList.end(); ++aSIt) {
 350     aMapExistent[*aSIt] = std::list<ObjectPtr>();
 351   }
 352   for (int anIndex = 0, aSize = anOffsetRefList->size(); anIndex < aSize; ++anIndex) {
 353     ObjectPtr aCurrent = anOffsetRefList->object(anIndex);
 354     int aBaseIndex = anOffsetToBaseMap->value(anIndex);
 355     if (aBaseIndex >= 0) {
 356       ObjectPtr aBaseObj = aBaseRefList->object(aBaseIndex);
 357       std::map<ObjectPtr, std::list<ObjectPtr> >::iterator aFound = aMapExistent.find(aBaseObj);
 358       if (aFound != aMapExistent.end())
 359         aFound->second.push_back(aCurrent);
 360       else
 361         anObjectsToRemove.push_back(aCurrent);
 362     }
 363     else
 364       anObjectsToRemove.push_back(aCurrent);
 365   }
 366
 367   // update lists of base shapes and of offset shapes
 368   int aBaseListSize = aBaseRefList->size();
 369   int anOffsetListSize = anOffsetRefList->size();
 370   int aBaseListIndex = 0, anOffsetListIndex = 0;
 371   std::list<int> anOffsetBaseBackRefs;
 372   std::set<GeomShapePtr, GeomAPI_Shape::ComparatorWithOri> aProcessedOffsets;
 373   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 374        aSIt != aSelectedList.end(); ++aSIt) {
 375     // find an offseted edge
 376     FeaturePtr aBaseFeature = ModelAPI_Feature::feature(*aSIt);
 377     GeomShapePtr aBaseShape = aBaseFeature->lastResult()->shape();
 378     ListOfShape aNewShapes;
 379     for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 380          anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 381       (*anAlgoIt)->generated(aBaseShape, aNewShapes);
 382       if (!aNewShapes.empty()) {
 383         reorderShapes(aNewShapes, (*anAlgoIt)->shape());
 384         break;
 385       }
 386     }
 387
 388     // store base feature
 389     setRefListValue(aBaseRefList, aBaseListSize, *aSIt, aBaseListIndex);
 390
 391     // create or update an offseted feature
 392     const std::list<ObjectPtr>& anImages = aMapExistent[*aSIt];
 393     std::list<ObjectPtr>::const_iterator anImgIt = anImages.begin();
 394     for (ListOfShape::iterator aNewIt = aNewShapes.begin(); aNewIt != aNewShapes.end(); ++aNewIt) {
 395       FeaturePtr aNewFeature;
 396       if (anImgIt != anImages.end())
 397         aNewFeature = ModelAPI_Feature::feature(*anImgIt++);
 398       updateExistentOrCreateNew(*aNewIt, aNewFeature, anObjectsToRemove);
 399       aProcessedOffsets.insert(*aNewIt);
 400
 401       // store an offseted feature
 402       setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 403
 404       anOffsetBaseBackRefs.push_back(aBaseListIndex);
 405       ++anOffsetListIndex;
 406     }
 407     ++aBaseListIndex;
 408     anObjectsToRemove.insert(anObjectsToRemove.end(), anImgIt, anImages.end());
 409   }
 410   // create arcs generated from vertices
 411   for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 412        anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 413     GeomShapePtr aCurWire = (*anAlgoIt)->shape();
 414     GeomAPI_ShapeExplorer anExp(aCurWire, GeomAPI_Shape::EDGE);
 415     for (; anExp.more(); anExp.next()) {
 416       GeomShapePtr aCurEdge = anExp.current();
 417       if (aProcessedOffsets.find(aCurEdge) == aProcessedOffsets.end()) {
 418         FeaturePtr aNewFeature;
 419         updateExistentOrCreateNew(aCurEdge, aNewFeature, anObjectsToRemove);
 420         aProcessedOffsets.insert(aCurEdge);
 421
 422         // store an offseted feature
 423         setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 424
 425         anOffsetBaseBackRefs.push_back(-1);
 426         ++anOffsetListIndex;
 427       }
 428     }
 429   }
 430
 431   removeLastFromIndex(aBaseRefList, aBaseListSize, aBaseListIndex);
 432   removeLastFromIndex(anOffsetRefList, anOffsetListSize, anOffsetListIndex);
 433
 434   anOffsetToBaseMap->setSize((int)anOffsetBaseBackRefs.size(), false);
 435   int anIndex = 0;
 436   for (std::list<int>::iterator anIt = anOffsetBaseBackRefs.begin();
 437        anIt != anOffsetBaseBackRefs.end(); ++anIt) {
 438     anOffsetToBaseMap->setValue(anIndex++, *anIt, false);
 439   }
 440
 441   // remove unused objects
 442   std::set<FeaturePtr> aSet;
 443   for (std::list<ObjectPtr>::iterator anIt = anObjectsToRemove.begin();
 444        anIt != anObjectsToRemove.end(); ++anIt) {
 445     FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 446     if (aFeature)
 447       aSet.insert(aFeature);
 448   }
 449   ModelAPI_Tools::removeFeaturesAndReferences(aSet);
 450 }
 451
 452 static void findOrCreateFeatureByKind(SketchPlugin_Sketch* theSketch,
 453                                       const std::string& theFeatureKind,
 454                                       FeaturePtr& theFeature,
 455                                       std::list<ObjectPtr>& thePoolOfFeatures)
 456 {
 457   if (theFeature) {
 458     // check the feature type is the same as required
 459     if (theFeature->getKind() != theFeatureKind) {
 460       // return feature to the pool and try to find the most appropriate
 461       thePoolOfFeatures.push_back(theFeature);
 462       theFeature = FeaturePtr();
 463     }
 464   }
 465   if (!theFeature) {
 466     // try to find appropriate feature in the pool
 467     for (std::list<ObjectPtr>::iterator it = thePoolOfFeatures.begin();
 468          it != thePoolOfFeatures.end(); ++it) {
 469       FeaturePtr aCurFeature = ModelAPI_Feature::feature(*it);
 470       if (aCurFeature->getKind() == theFeatureKind) {
 471         theFeature = aCurFeature;
 472         thePoolOfFeatures.erase(it);
 473         break;
 474       }
 475     }
 476     // feature not found, create new
 477     if (!theFeature)
 478       theFeature = theSketch->addFeature(theFeatureKind);
 479   }
 480 }
 481
 482 void SketchPlugin_Offset::updateExistentOrCreateNew(const GeomShapePtr& theShape,
 483                                                     FeaturePtr& theFeature,
 484                                                     std::list<ObjectPtr>& thePoolOfFeatures)
 485 {
 486   if (theShape->shapeType() != GeomAPI_Shape::EDGE)
 487     return;
 488
 489   std::shared_ptr<GeomAPI_Edge> aResEdge(new GeomAPI_Edge(theShape));
 490
 491   std::shared_ptr<GeomAPI_Pnt2d> aFP, aLP;
 492   std::shared_ptr<GeomAPI_Pnt> aFP3d = aResEdge->firstPoint();
 493   std::shared_ptr<GeomAPI_Pnt> aLP3d = aResEdge->lastPoint();
 494   if (aFP3d && aLP3d) {
 495     aFP = sketch()->to2D(aFP3d);
 496     aLP = sketch()->to2D(aLP3d);
 497   }
 498
 499   if (aResEdge->isLine()) {
 500     findOrCreateFeatureByKind(sketch(), SketchPlugin_Line::ID(), theFeature, thePoolOfFeatures);
 501
 502     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 503       (theFeature->attribute(SketchPlugin_Line::START_ID()))->setValue(aFP);
 504     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 505       (theFeature->attribute(SketchPlugin_Line::END_ID()))->setValue(aLP);
 506   }
 507   else if (aResEdge->isArc()) {
 508     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 509     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 510     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 511
 512     findOrCreateFeatureByKind(sketch(), SketchPlugin_Arc::ID(), theFeature, thePoolOfFeatures);
 513
 514     GeomDirPtr aCircNormal = aCircEdge->normal();
 515     GeomDirPtr aSketchNormal = sketch()->coordinatePlane()->normal();
 516     if (aSketchNormal->dot(aCircNormal) < -tolerance)
 517       std::swap(aFP, aLP);
 518
 519     bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 520     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 521       (theFeature->attribute(SketchPlugin_Arc::END_ID()))->setValue(aLP);
 522     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 523       (theFeature->attribute(SketchPlugin_Arc::START_ID()))->setValue(aFP);
 524     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 525       (theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCP);
 526     theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 527   }
 528   else if (aResEdge->isCircle()) {
 529     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 530     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 531     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 532
 533     findOrCreateFeatureByKind(sketch(), SketchPlugin_Circle::ID(), theFeature, thePoolOfFeatures);
 534
 535     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 536       (theFeature->attribute(SketchPlugin_Circle::CENTER_ID()))->setValue(aCP);
 537     theFeature->real(SketchPlugin_Circle::RADIUS_ID())->setValue(aCircEdge->radius());
 538   }
 539   else if (aResEdge->isEllipse()) {
 540     std::shared_ptr<GeomAPI_Ellipse> anEllipseEdge = aResEdge->ellipse();
 541
 542     GeomPointPtr aCP3d = anEllipseEdge->center();
 543     GeomPnt2dPtr aCP = sketch()->to2D(aCP3d);
 544
 545     GeomPointPtr aFocus3d = anEllipseEdge->firstFocus();
 546     GeomPnt2dPtr aFocus = sketch()->to2D(aFocus3d);
 547
 548     if (aFP3d && aLP3d) {
 549       // Elliptic arc
 550       findOrCreateFeatureByKind(sketch(), SketchPlugin_EllipticArc::ID(),
 551                                 theFeature, thePoolOfFeatures);
 552
 553       bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 554       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 555         (theFeature->attribute(SketchPlugin_EllipticArc::CENTER_ID()))->setValue(aCP);
 556       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 557         (theFeature->attribute(SketchPlugin_EllipticArc::FIRST_FOCUS_ID()))->setValue(aFocus);
 558       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 559         (theFeature->attribute(SketchPlugin_EllipticArc::START_POINT_ID()))->setValue(aFP);
 560       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 561         (theFeature->attribute(SketchPlugin_EllipticArc::END_POINT_ID()))->setValue(aLP);
 562       theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 563     }
 564     else {
 565       // Ellipse
 566       findOrCreateFeatureByKind(sketch(), SketchPlugin_Ellipse::ID(),
 567                                 theFeature, thePoolOfFeatures);
 568
 569       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 570         (theFeature->attribute(SketchPlugin_Ellipse::CENTER_ID()))->setValue(aCP);
 571       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 572         (theFeature->attribute(SketchPlugin_Ellipse::FIRST_FOCUS_ID()))->setValue(aFocus);
 573       theFeature->real(SketchPlugin_Ellipse::MINOR_RADIUS_ID())->setValue(
 574         anEllipseEdge->minorRadius());
 575     }
 576   }
 577   else {
 578     // convert to b-spline
 579     mkBSpline(theFeature, aResEdge, thePoolOfFeatures);
 580   }
 581
 582   if (theFeature.get()) {
 583     theFeature->boolean(SketchPlugin_SketchEntity::COPY_ID())->setValue(true);
 584     theFeature->execute();
 585
 586     static Events_ID aRedisplayEvent = Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY);
 587     ModelAPI_EventCreator::get()->sendUpdated(theFeature, aRedisplayEvent);
 588     const std::list<ResultPtr>& aResults = theFeature->results();
 589     for (std::list<ResultPtr>::const_iterator anIt = aResults.begin();
 590          anIt != aResults.end(); ++anIt)
 591       ModelAPI_EventCreator::get()->sendUpdated(*anIt, aRedisplayEvent);
 592   }
 593 }
 594
 595 void SketchPlugin_Offset::mkBSpline (FeaturePtr& theResult,
 596                                      const GeomEdgePtr& theEdge,
 597                                      std::list<ObjectPtr>& thePoolOfFeatures)
 598 {
 599   GeomCurvePtr aCurve (new GeomAPI_Curve (theEdge));
 600   // Forced conversion to b-spline, if aCurve is not b-spline
 601   GeomBSplinePtr aBSpline = GeomAPI_BSpline::convertToBSpline(aCurve);
 602
 603   const std::string& aBSplineKind = aBSpline->isPeriodic() ? SketchPlugin_BSplinePeriodic::ID()
 604                                                            : SketchPlugin_BSpline::ID();
 605   findOrCreateFeatureByKind(sketch(), aBSplineKind, theResult, thePoolOfFeatures);
 606
 607   theResult->integer(SketchPlugin_BSpline::DEGREE_ID())->setValue(aBSpline->degree());
 608
 609   AttributePoint2DArrayPtr aPolesAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2DArray>
 610     (theResult->attribute(SketchPlugin_BSpline::POLES_ID()));
 611   std::list<GeomPointPtr> aPoles = aBSpline->poles();
 612   aPolesAttr->setSize((int)aPoles.size());
 613   std::list<GeomPointPtr>::iterator anIt = aPoles.begin();
 614   for (int anIndex = 0; anIt != aPoles.end(); ++anIt, ++anIndex) {
 615     GeomPnt2dPtr aPoleInSketch = sketch()->to2D(*anIt);
 616     aPolesAttr->setPnt(anIndex, aPoleInSketch);
 617   }
 618
 619   AttributeDoubleArrayPtr aWeightsAttr =
 620       theResult->data()->realArray(SketchPlugin_BSpline::WEIGHTS_ID());
 621   std::list<double> aWeights = aBSpline->weights();
 622   if (aWeights.empty()) { // rational B-spline
 623     int aSize = (int)aPoles.size();
 624     aWeightsAttr->setSize(aSize);
 625     for (int anIndex = 0; anIndex < aSize; ++anIndex)
 626       aWeightsAttr->setValue(anIndex, 1.0);
 627   }
 628   else { // non-rational B-spline
 629     aWeightsAttr->setSize((int)aWeights.size());
 630     std::list<double>::iterator anIt = aWeights.begin();
 631     for (int anIndex = 0; anIt != aWeights.end(); ++anIt, ++anIndex)
 632       aWeightsAttr->setValue(anIndex, *anIt);
 633   }
 634
 635   AttributeDoubleArrayPtr aKnotsAttr =
 636       theResult->data()->realArray(SketchPlugin_BSpline::KNOTS_ID());
 637   std::list<double> aKnots = aBSpline->knots();
 638   int aSize = (int)aKnots.size();
 639   aKnotsAttr->setSize(aSize);
 640   std::list<double>::iterator aKIt = aKnots.begin();
 641   for (int index = 0; index < aSize; ++index, ++aKIt)
 642     aKnotsAttr->setValue(index, *aKIt);
 643
 644   AttributeIntArrayPtr aMultsAttr =
 645       theResult->data()->intArray(SketchPlugin_BSpline::MULTS_ID());
 646   std::list<int> aMultiplicities = aBSpline->mults();
 647   aSize = (int)aMultiplicities.size();
 648   aMultsAttr->setSize(aSize);
 649   std::list<int>::iterator aMIt = aMultiplicities.begin();
 650   for (int index = 0; index < aSize; ++index, ++aMIt)
 651     aMultsAttr->setValue(index, *aMIt);
 652 }
 653
 654 void SketchPlugin_Offset::attributeChanged(const std::string& theID)
 655 {
 656 ////  if (theID == EDGES_ID())
 657 ////    removeCreated();
 658 }
 659
 660 bool SketchPlugin_Offset::customAction(const std::string& theActionId)
 661 {
 662   bool isOk = false;
 663   if (theActionId == ADD_WIRE_ACTION_ID()) {
 664     isOk = findWires();
 665   }
 666   else {
 667     std::string aMsg = "Error: Feature \"%1\" does not support action \"%2\".";
 668     Events_InfoMessage("SketchPlugin_Offset", aMsg).arg(getKind()).arg(theActionId).send();
 669   }
 670   return isOk;
 671 }
 672
 673 bool SketchPlugin_Offset::findWires()
 674 {
 675   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 676   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 677
 678   // Empty set
 679   std::set<FeaturePtr> anEdgesSet;
 680
 681   // Processed set
 682   std::set<FeaturePtr> aProcessedSet;
 683
 684   // Put all selected edges in a set to avoid adding them in reflist(EDGES_ID())
 685   std::set<FeaturePtr> aSelectedSet;
 686   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 687   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 688     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 689     if (aFeature) {
 690       aSelectedSet.insert(aFeature);
 691     }
 692   }
 693
 694   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 695
 696   // Gather chains of edges
 697   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 698     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 699     if (aFeature.get()) {
 700       if (aProcessedSet.find(aFeature) != aProcessedSet.end())
 701         continue;
 702       aProcessedSet.insert(aFeature);
 703
 704       // End points (if any)
 705       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 706       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 707
 708       std::list<FeaturePtr> aChain;
 709       aChain.push_back(aFeature);
 710       bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet, aChain, true);
 711       if (!isClosed)
 712         findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet, aChain, false);
 713
 714       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 715       for (; aChainIt != aChain.end(); ++aChainIt) {
 716         FeaturePtr aChainFeature = (*aChainIt);
 717         aProcessedSet.insert(aChainFeature);
 718         if (aSelectedSet.find(aChainFeature) == aSelectedSet.end()) {
 719           aSelectedEdges->append(aChainFeature->lastResult());
 720         }
 721       }
 722     }
 723   }
 724   // TODO: hilight selection in the viewer
 725
 726   data()->blockSendAttributeUpdated(aWasBlocked);
 727   return true;
 728 }
 729
 730
 731 AISObjectPtr SketchPlugin_Offset::getAISObject(AISObjectPtr thePrevious)
 732 {
 733   if (!sketch())
 734     return thePrevious;
 735
 736   AISObjectPtr anAIS = SketcherPrs_Factory::offsetObject(this, sketch(),
 737     thePrevious);
 738   return anAIS;
 739 }