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       bool isClosed = !(aStartPoint && anEndPoint);  // not closed edge
 147       if (!isClosed) {
 148         isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet,
 149                                   aProcessedEdgesSet, aChain, true);
 150         if (!isClosed) {
 151           isClosed = findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet,
 152                                     aProcessedEdgesSet, aChain, false);
 153         }
 154       }
 155       aProcessedEdgesSet.insert(aFeature);
 156
 157       // 5.c. Make wire
 158       ListOfShape aTopoChain;
 159       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 160       for (; aChainIt != aChain.end(); ++aChainIt) {
 161         FeaturePtr aChainFeature = (*aChainIt);
 162         GeomShapePtr aTopoEdge = aChainFeature->lastResult()->shape();
 163         if (aTopoEdge->shapeType() == GeomAPI_Shape::EDGE) {
 164           aTopoChain.push_back(aTopoEdge);
 165         }
 166       }
 167       std::shared_ptr<GeomAlgoAPI_WireBuilder> aWireBuilder(
 168           new GeomAlgoAPI_WireBuilder(aTopoChain, !isClosed));
 169
 170       GeomShapePtr aWireShape = aWireBuilder->shape();
 171       GeomWirePtr aWire (new GeomAPI_Wire (aWireShape));
 172
 173       // Fix for a problem of offset side change with selection change.
 174       // Wire direction is defined by the first selected edge of this wire.
 175       double aSign = 1.;
 176       if (!aWire->isClosed()) {
 177         ListOfShape aModified;
 178         // First selected edge of current chain
 179         GeomShapePtr aFirstSel = aFeature->lastResult()->shape();
 180         aWireBuilder->modified(aFirstSel, aModified);
 181         GeomShapePtr aModFS = aModified.front();
 182         if (aModFS->orientation() != aFirstSel->orientation())
 183           aSign = -1.;
 184       }
 185
 186       // 5.d. Make offset for the wire
 187       std::shared_ptr<GeomAlgoAPI_Offset> anOffsetShape(
 188           new GeomAlgoAPI_Offset(aPlane, aWireShape, aValue*aSign));
 189
 190       std::shared_ptr<GeomAlgoAPI_MakeShapeList> aMakeList(new GeomAlgoAPI_MakeShapeList);
 191       aMakeList->appendAlgo(aWireBuilder);
 192       aMakeList->appendAlgo(anOffsetShape);
 193       anOffsetAlgos.push_back(aMakeList);
 194     }
 195   }
 196
 197   // 6. Store offset results.
 198   //    Create sketch feature for each edge of anOffsetShape, and also store
 199   //    created features in CREATED_ID() to remove them on next execute()
 200   addToSketch(anOffsetAlgos);
 201
 202   // send events to update the sub-features by the solver
 203   if (isUpdateFlushed)
 204     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 205 }
 206
 207 bool SketchPlugin_Offset::findWireOneWay (const FeaturePtr& theFirstEdge,
 208                                           const FeaturePtr& theEdge,
 209                                           const std::shared_ptr<GeomDataAPI_Point2D>& theEndPoint,
 210                                           std::set<FeaturePtr>& theEdgesSet,
 211                                           std::set<FeaturePtr>& theProcessedEdgesSet,
 212                                           std::list<FeaturePtr>& theChain,
 213                                           const bool isPrepend)
 214 {
 215   // 1. Find a single edge, coincident to theEndPoint by one of its ends
 216   if (!theEndPoint) return false;
 217
 218   FeaturePtr aNextEdgeFeature;
 219   int nbFound = 0;
 220
 221   std::set<AttributePoint2DPtr> aCoincPoints =
 222       SketchPlugin_Tools::findPointsCoincidentToPoint(theEndPoint);
 223
 224   std::set<AttributePoint2DPtr>::iterator aPointsIt = aCoincPoints.begin();
 225   for (; aPointsIt != aCoincPoints.end(); aPointsIt++) {
 226     AttributePoint2DPtr aP = (*aPointsIt);
 227     FeaturePtr aCoincFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aP->owner());
 228     bool isInSet = (theEdgesSet.find(aCoincFeature) != theEdgesSet.end());
 229
 230     // Condition 0: not auxiliary
 231     if (!isInSet && aCoincFeature->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value())
 232       continue;
 233
 234     // Condition 1: not a point feature
 235     if (aCoincFeature->getKind() != SketchPlugin_Point::ID()) {
 236       // Condition 2: it is not the current edge
 237       if (aCoincFeature != theEdge) {
 238         // Condition 3: it is in the set of interest.
 239         //              Empty set means all sketch edges.
 240         if (isInSet || theEdgesSet.empty()) {
 241           // Condition 4: consider only features with two end points
 242           std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 243           SketchPlugin_SegmentationTools::getFeaturePoints(aCoincFeature, aP1, aP2);
 244           if (aP1 && aP2) {
 245             // Condition 5: consider only features, that have aP as one of they ends.
 246             //              For example, we do not need an arc, coincident to aP by its center.
 247             if (theEndPoint->pnt()->isEqual(aP1->pnt()) ||
 248                 theEndPoint->pnt()->isEqual(aP2->pnt())) {
 249               // Condition 6: only one edge can prolongate the chain. If several, we stop here.
 250               nbFound++;
 251               if (nbFound > 1)
 252                 return false;
 253
 254               // One found
 255               aNextEdgeFeature = aCoincFeature;
 256             }
 257           }
 258         }
 259       }
 260     }
 261   }
 262
 263   // Only one edge can prolongate the chain. If several or none, we stop here.
 264   if (nbFound != 1)
 265     return false;
 266
 267   // 2. So, we have the single edge, that prolongate the chain
 268
 269   // Condition 7: if we reached the very first edge of the chain
 270   if (aNextEdgeFeature == theFirstEdge)
 271     // Closed chain found
 272     return true;
 273
 274   // 3. Add the found edge to the chain
 275   if (isPrepend)
 276     theChain.push_front(aNextEdgeFeature);
 277   else
 278     theChain.push_back(aNextEdgeFeature);
 279   theProcessedEdgesSet.insert(aNextEdgeFeature);
 280
 281   // 4. Which end of aNextEdgeFeature we need to proceed
 282   std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 283   SketchPlugin_SegmentationTools::getFeaturePoints(aNextEdgeFeature, aP1, aP2);
 284   if (aP2->pnt()->isEqual(theEndPoint->pnt())) {
 285     // reversed
 286     aP2 = aP1;
 287   }
 288
 289   // 5. Continue gathering the chain (recursive)
 290   return findWireOneWay (theFirstEdge, aNextEdgeFeature, aP2, theEdgesSet,
 291                          theProcessedEdgesSet, theChain, isPrepend);
 292 }
 293
 294 static void setRefListValue(AttributeRefListPtr theList, int theListSize,
 295                             ObjectPtr theValue, int theIndex)
 296 {
 297   if (theIndex < theListSize) {
 298     ObjectPtr aCur = theList->object(theIndex);
 299     if (aCur != theValue)
 300       theList->substitute(aCur, theValue);
 301   }
 302   else
 303     theList->append(theValue);
 304 }
 305
 306 // Reorder shapes according to the wire's order
 307 static void reorderShapes(ListOfShape& theShapes, GeomShapePtr theWire)
 308 {
 309   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aShapes;
 310   aShapes.insert(theShapes.begin(), theShapes.end());
 311   theShapes.clear();
 312
 313   GeomWirePtr aWire(new GeomAPI_Wire(theWire));
 314   GeomAPI_WireExplorer anExp(aWire);
 315   for (; anExp.more(); anExp.next()) {
 316     GeomShapePtr aCurEdge = anExp.current();
 317     auto aFound = aShapes.find(aCurEdge);
 318     if (aFound != aShapes.end()) {
 319       theShapes.push_back(aCurEdge);
 320       aShapes.erase(aFound);
 321     }
 322   }
 323 }
 324
 325 static void removeLastFromIndex(AttributeRefListPtr theList, int theListSize, int& theLastIndex)
 326 {
 327   if (theLastIndex < theListSize) {
 328     std::set<int> anIndicesToRemove;
 329     for (; theLastIndex < theListSize; ++theLastIndex)
 330       anIndicesToRemove.insert(theLastIndex);
 331     theList->remove(anIndicesToRemove);
 332   }
 333 }
 334
 335 void SketchPlugin_Offset::addToSketch(const ListOfMakeShape& theOffsetAlgos)
 336 {
 337   AttributeRefListPtr aSelectedRefList = reflist(EDGES_ID());
 338   AttributeRefListPtr aBaseRefList = reflist(ENTITY_A());
 339   AttributeRefListPtr anOffsetRefList = reflist(ENTITY_B());
 340   AttributeIntArrayPtr anOffsetToBaseMap = intArray(ENTITY_C());
 341
 342   // compare the list of selected edges and the previously stored,
 343   // and store maping between them
 344   std::map<ObjectPtr, std::list<ObjectPtr> > aMapExistent;
 345   std::list<ObjectPtr> anObjectsToRemove;
 346   std::list<ObjectPtr> aSelectedList = aSelectedRefList->list();
 347   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 348        aSIt != aSelectedList.end(); ++aSIt) {
 349     aMapExistent[*aSIt] = std::list<ObjectPtr>();
 350   }
 351   for (int anIndex = 0, aSize = anOffsetRefList->size(); anIndex < aSize; ++anIndex) {
 352     ObjectPtr aCurrent = anOffsetRefList->object(anIndex);
 353     int aBaseIndex = anOffsetToBaseMap->value(anIndex);
 354     if (aBaseIndex >= 0) {
 355       ObjectPtr aBaseObj = aBaseRefList->object(aBaseIndex);
 356       std::map<ObjectPtr, std::list<ObjectPtr> >::iterator aFound = aMapExistent.find(aBaseObj);
 357       if (aFound != aMapExistent.end())
 358         aFound->second.push_back(aCurrent);
 359       else
 360         anObjectsToRemove.push_back(aCurrent);
 361     }
 362     else
 363       anObjectsToRemove.push_back(aCurrent);
 364   }
 365
 366   // update lists of base shapes and of offset shapes
 367   int aBaseListSize = aBaseRefList->size();
 368   int anOffsetListSize = anOffsetRefList->size();
 369   int aBaseListIndex = 0, anOffsetListIndex = 0;
 370   std::list<int> anOffsetBaseBackRefs;
 371   std::set<GeomShapePtr, GeomAPI_Shape::ComparatorWithOri> aProcessedOffsets;
 372   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 373        aSIt != aSelectedList.end(); ++aSIt) {
 374     // find an offseted edge
 375     FeaturePtr aBaseFeature = ModelAPI_Feature::feature(*aSIt);
 376     GeomShapePtr aBaseShape = aBaseFeature->lastResult()->shape();
 377     ListOfShape aNewShapes;
 378     for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 379          anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 380       (*anAlgoIt)->generated(aBaseShape, aNewShapes);
 381       if (!aNewShapes.empty()) {
 382         reorderShapes(aNewShapes, (*anAlgoIt)->shape());
 383         break;
 384       }
 385     }
 386
 387     // store base feature
 388     setRefListValue(aBaseRefList, aBaseListSize, *aSIt, aBaseListIndex);
 389
 390     // create or update an offseted feature
 391     const std::list<ObjectPtr>& anImages = aMapExistent[*aSIt];
 392     std::list<ObjectPtr>::const_iterator anImgIt = anImages.begin();
 393     for (ListOfShape::iterator aNewIt = aNewShapes.begin(); aNewIt != aNewShapes.end(); ++aNewIt) {
 394       FeaturePtr aNewFeature;
 395       if (anImgIt != anImages.end())
 396         aNewFeature = ModelAPI_Feature::feature(*anImgIt++);
 397       updateExistentOrCreateNew(*aNewIt, aNewFeature, anObjectsToRemove);
 398       aProcessedOffsets.insert(*aNewIt);
 399
 400       // store an offseted feature
 401       setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 402
 403       anOffsetBaseBackRefs.push_back(aBaseListIndex);
 404       ++anOffsetListIndex;
 405     }
 406     ++aBaseListIndex;
 407     anObjectsToRemove.insert(anObjectsToRemove.end(), anImgIt, anImages.end());
 408   }
 409   // create arcs generated from vertices
 410   for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 411        anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 412     GeomShapePtr aCurWire = (*anAlgoIt)->shape();
 413     GeomAPI_ShapeExplorer anExp(aCurWire, GeomAPI_Shape::EDGE);
 414     for (; anExp.more(); anExp.next()) {
 415       GeomShapePtr aCurEdge = anExp.current();
 416       if (aProcessedOffsets.find(aCurEdge) == aProcessedOffsets.end()) {
 417         FeaturePtr aNewFeature;
 418         updateExistentOrCreateNew(aCurEdge, aNewFeature, anObjectsToRemove);
 419         aProcessedOffsets.insert(aCurEdge);
 420
 421         // store an offseted feature
 422         setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 423
 424         anOffsetBaseBackRefs.push_back(-1);
 425         ++anOffsetListIndex;
 426       }
 427     }
 428   }
 429
 430   removeLastFromIndex(aBaseRefList, aBaseListSize, aBaseListIndex);
 431   removeLastFromIndex(anOffsetRefList, anOffsetListSize, anOffsetListIndex);
 432
 433   anOffsetToBaseMap->setSize((int)anOffsetBaseBackRefs.size(), false);
 434   int anIndex = 0;
 435   for (std::list<int>::iterator anIt = anOffsetBaseBackRefs.begin();
 436        anIt != anOffsetBaseBackRefs.end(); ++anIt) {
 437     anOffsetToBaseMap->setValue(anIndex++, *anIt, false);
 438   }
 439
 440   // remove unused objects
 441   std::set<FeaturePtr> aSet;
 442   for (std::list<ObjectPtr>::iterator anIt = anObjectsToRemove.begin();
 443        anIt != anObjectsToRemove.end(); ++anIt) {
 444     FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 445     if (aFeature)
 446       aSet.insert(aFeature);
 447   }
 448   ModelAPI_Tools::removeFeaturesAndReferences(aSet);
 449 }
 450
 451 static void findOrCreateFeatureByKind(SketchPlugin_Sketch* theSketch,
 452                                       const std::string& theFeatureKind,
 453                                       FeaturePtr& theFeature,
 454                                       std::list<ObjectPtr>& thePoolOfFeatures)
 455 {
 456   if (theFeature) {
 457     // check the feature type is the same as required
 458     if (theFeature->getKind() != theFeatureKind) {
 459       // return feature to the pool and try to find the most appropriate
 460       thePoolOfFeatures.push_back(theFeature);
 461       theFeature = FeaturePtr();
 462     }
 463   }
 464   if (!theFeature) {
 465     // try to find appropriate feature in the pool
 466     for (std::list<ObjectPtr>::iterator it = thePoolOfFeatures.begin();
 467          it != thePoolOfFeatures.end(); ++it) {
 468       FeaturePtr aCurFeature = ModelAPI_Feature::feature(*it);
 469       if (aCurFeature->getKind() == theFeatureKind) {
 470         theFeature = aCurFeature;
 471         thePoolOfFeatures.erase(it);
 472         break;
 473       }
 474     }
 475     // feature not found, create new
 476     if (!theFeature)
 477       theFeature = theSketch->addFeature(theFeatureKind);
 478   }
 479 }
 480
 481 void SketchPlugin_Offset::updateExistentOrCreateNew(const GeomShapePtr& theShape,
 482                                                     FeaturePtr& theFeature,
 483                                                     std::list<ObjectPtr>& thePoolOfFeatures)
 484 {
 485   if (theShape->shapeType() != GeomAPI_Shape::EDGE)
 486     return;
 487
 488   std::shared_ptr<GeomAPI_Edge> aResEdge(new GeomAPI_Edge(theShape));
 489
 490   std::shared_ptr<GeomAPI_Pnt2d> aFP, aLP;
 491   std::shared_ptr<GeomAPI_Pnt> aFP3d = aResEdge->firstPoint();
 492   std::shared_ptr<GeomAPI_Pnt> aLP3d = aResEdge->lastPoint();
 493   if (aFP3d && aLP3d) {
 494     aFP = sketch()->to2D(aFP3d);
 495     aLP = sketch()->to2D(aLP3d);
 496   }
 497
 498   if (aResEdge->isLine()) {
 499     findOrCreateFeatureByKind(sketch(), SketchPlugin_Line::ID(), theFeature, thePoolOfFeatures);
 500
 501     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 502       (theFeature->attribute(SketchPlugin_Line::START_ID()))->setValue(aFP);
 503     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 504       (theFeature->attribute(SketchPlugin_Line::END_ID()))->setValue(aLP);
 505   }
 506   else if (aResEdge->isArc()) {
 507     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 508     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 509     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 510
 511     findOrCreateFeatureByKind(sketch(), SketchPlugin_Arc::ID(), theFeature, thePoolOfFeatures);
 512
 513     GeomDirPtr aCircNormal = aCircEdge->normal();
 514     GeomDirPtr aSketchNormal = sketch()->coordinatePlane()->normal();
 515     if (aSketchNormal->dot(aCircNormal) < -tolerance)
 516       std::swap(aFP, aLP);
 517
 518     bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 519     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 520       (theFeature->attribute(SketchPlugin_Arc::END_ID()))->setValue(aLP);
 521     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 522       (theFeature->attribute(SketchPlugin_Arc::START_ID()))->setValue(aFP);
 523     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 524       (theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCP);
 525     theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 526   }
 527   else if (aResEdge->isCircle()) {
 528     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 529     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 530     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 531
 532     findOrCreateFeatureByKind(sketch(), SketchPlugin_Circle::ID(), theFeature, thePoolOfFeatures);
 533
 534     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 535       (theFeature->attribute(SketchPlugin_Circle::CENTER_ID()))->setValue(aCP);
 536     theFeature->real(SketchPlugin_Circle::RADIUS_ID())->setValue(aCircEdge->radius());
 537   }
 538   else if (aResEdge->isEllipse()) {
 539     std::shared_ptr<GeomAPI_Ellipse> anEllipseEdge = aResEdge->ellipse();
 540
 541     GeomPointPtr aCP3d = anEllipseEdge->center();
 542     GeomPnt2dPtr aCP = sketch()->to2D(aCP3d);
 543
 544     GeomPointPtr aFocus3d = anEllipseEdge->firstFocus();
 545     GeomPnt2dPtr aFocus = sketch()->to2D(aFocus3d);
 546
 547     if (aFP3d && aLP3d) {
 548       // Elliptic arc
 549       findOrCreateFeatureByKind(sketch(), SketchPlugin_EllipticArc::ID(),
 550                                 theFeature, thePoolOfFeatures);
 551
 552       bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 553       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 554         (theFeature->attribute(SketchPlugin_EllipticArc::CENTER_ID()))->setValue(aCP);
 555       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 556         (theFeature->attribute(SketchPlugin_EllipticArc::FIRST_FOCUS_ID()))->setValue(aFocus);
 557       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 558         (theFeature->attribute(SketchPlugin_EllipticArc::START_POINT_ID()))->setValue(aFP);
 559       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 560         (theFeature->attribute(SketchPlugin_EllipticArc::END_POINT_ID()))->setValue(aLP);
 561       theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 562     }
 563     else {
 564       // Ellipse
 565       findOrCreateFeatureByKind(sketch(), SketchPlugin_Ellipse::ID(),
 566                                 theFeature, thePoolOfFeatures);
 567
 568       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 569         (theFeature->attribute(SketchPlugin_Ellipse::CENTER_ID()))->setValue(aCP);
 570       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 571         (theFeature->attribute(SketchPlugin_Ellipse::FIRST_FOCUS_ID()))->setValue(aFocus);
 572       theFeature->real(SketchPlugin_Ellipse::MINOR_RADIUS_ID())->setValue(
 573         anEllipseEdge->minorRadius());
 574     }
 575   }
 576   else {
 577     // convert to b-spline
 578     mkBSpline(theFeature, aResEdge, thePoolOfFeatures);
 579   }
 580
 581   if (theFeature.get()) {
 582     theFeature->boolean(SketchPlugin_SketchEntity::COPY_ID())->setValue(true);
 583     theFeature->execute();
 584
 585     static Events_ID aRedisplayEvent = Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY);
 586     ModelAPI_EventCreator::get()->sendUpdated(theFeature, aRedisplayEvent);
 587     const std::list<ResultPtr>& aResults = theFeature->results();
 588     for (std::list<ResultPtr>::const_iterator anIt = aResults.begin();
 589          anIt != aResults.end(); ++anIt)
 590       ModelAPI_EventCreator::get()->sendUpdated(*anIt, aRedisplayEvent);
 591   }
 592 }
 593
 594 void SketchPlugin_Offset::mkBSpline (FeaturePtr& theResult,
 595                                      const GeomEdgePtr& theEdge,
 596                                      std::list<ObjectPtr>& thePoolOfFeatures)
 597 {
 598   GeomCurvePtr aCurve (new GeomAPI_Curve (theEdge));
 599   // Forced conversion to b-spline, if aCurve is not b-spline
 600   GeomBSplinePtr aBSpline = GeomAPI_BSpline::convertToBSpline(aCurve);
 601
 602   const std::string& aBSplineKind = aBSpline->isPeriodic() ? SketchPlugin_BSplinePeriodic::ID()
 603                                                            : SketchPlugin_BSpline::ID();
 604   findOrCreateFeatureByKind(sketch(), aBSplineKind, theResult, thePoolOfFeatures);
 605
 606   theResult->integer(SketchPlugin_BSpline::DEGREE_ID())->setValue(aBSpline->degree());
 607
 608   AttributePoint2DArrayPtr aPolesAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2DArray>
 609     (theResult->attribute(SketchPlugin_BSpline::POLES_ID()));
 610   std::list<GeomPointPtr> aPoles = aBSpline->poles();
 611   aPolesAttr->setSize((int)aPoles.size());
 612   std::list<GeomPointPtr>::iterator anIt = aPoles.begin();
 613   for (int anIndex = 0; anIt != aPoles.end(); ++anIt, ++anIndex) {
 614     GeomPnt2dPtr aPoleInSketch = sketch()->to2D(*anIt);
 615     aPolesAttr->setPnt(anIndex, aPoleInSketch);
 616   }
 617
 618   AttributeDoubleArrayPtr aWeightsAttr =
 619       theResult->data()->realArray(SketchPlugin_BSpline::WEIGHTS_ID());
 620   std::list<double> aWeights = aBSpline->weights();
 621   if (aWeights.empty()) { // rational B-spline
 622     int aSize = (int)aPoles.size();
 623     aWeightsAttr->setSize(aSize);
 624     for (int anIndex = 0; anIndex < aSize; ++anIndex)
 625       aWeightsAttr->setValue(anIndex, 1.0);
 626   }
 627   else { // non-rational B-spline
 628     aWeightsAttr->setSize((int)aWeights.size());
 629     std::list<double>::iterator anIt = aWeights.begin();
 630     for (int anIndex = 0; anIt != aWeights.end(); ++anIt, ++anIndex)
 631       aWeightsAttr->setValue(anIndex, *anIt);
 632   }
 633
 634   AttributeDoubleArrayPtr aKnotsAttr =
 635       theResult->data()->realArray(SketchPlugin_BSpline::KNOTS_ID());
 636   std::list<double> aKnots = aBSpline->knots();
 637   int aSize = (int)aKnots.size();
 638   aKnotsAttr->setSize(aSize);
 639   std::list<double>::iterator aKIt = aKnots.begin();
 640   for (int index = 0; index < aSize; ++index, ++aKIt)
 641     aKnotsAttr->setValue(index, *aKIt);
 642
 643   AttributeIntArrayPtr aMultsAttr =
 644       theResult->data()->intArray(SketchPlugin_BSpline::MULTS_ID());
 645   std::list<int> aMultiplicities = aBSpline->mults();
 646   aSize = (int)aMultiplicities.size();
 647   aMultsAttr->setSize(aSize);
 648   std::list<int>::iterator aMIt = aMultiplicities.begin();
 649   for (int index = 0; index < aSize; ++index, ++aMIt)
 650     aMultsAttr->setValue(index, *aMIt);
 651 }
 652
 653 void SketchPlugin_Offset::attributeChanged(const std::string& theID)
 654 {
 655   if (theID == EDGES_ID()) {
 656     AttributeRefListPtr aSelected = reflist(EDGES_ID());
 657     if (aSelected->size() == 0) {
 658       // Clear list of objects
 659       AttributeRefListPtr anOffsetAttr = reflist(SketchPlugin_Constraint::ENTITY_B());
 660       std::list<ObjectPtr> anOffsetList = anOffsetAttr->list();
 661       std::set<FeaturePtr> aFeaturesToBeRemoved;
 662       for (std::list<ObjectPtr>::iterator anIt = anOffsetList.begin();
 663            anIt != anOffsetList.end(); ++anIt) {
 664         FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 665         if (aFeature)
 666           aFeaturesToBeRemoved.insert(aFeature);
 667       }
 668
 669       reflist(SketchPlugin_Constraint::ENTITY_A())->clear();
 670       anOffsetAttr->clear();
 671       intArray(SketchPlugin_Constraint::ENTITY_C())->setSize(0);
 672
 673       ModelAPI_Tools::removeFeaturesAndReferences(aFeaturesToBeRemoved);
 674     }
 675   }
 676 }
 677
 678 bool SketchPlugin_Offset::customAction(const std::string& theActionId)
 679 {
 680   bool isOk = false;
 681   if (theActionId == ADD_WIRE_ACTION_ID()) {
 682     isOk = findWires();
 683   }
 684   else {
 685     std::string aMsg = "Error: Feature \"%1\" does not support action \"%2\".";
 686     Events_InfoMessage("SketchPlugin_Offset", aMsg).arg(getKind()).arg(theActionId).send();
 687   }
 688   return isOk;
 689 }
 690
 691 bool SketchPlugin_Offset::findWires()
 692 {
 693   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 694   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 695
 696   // Empty set
 697   std::set<FeaturePtr> anEdgesSet;
 698
 699   // Processed set
 700   std::set<FeaturePtr> aProcessedEdgesSet;
 701
 702   // Put all selected edges in a set to avoid adding them in reflist(EDGES_ID())
 703   std::set<FeaturePtr> aSelectedSet;
 704   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 705   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 706     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 707     if (aFeature) {
 708       aSelectedSet.insert(aFeature);
 709     }
 710   }
 711
 712   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 713
 714   // Gather chains of edges
 715   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 716     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 717     if (aFeature.get()) {
 718       if (aProcessedEdgesSet.find(aFeature) != aProcessedEdgesSet.end())
 719         continue;
 720       aProcessedEdgesSet.insert(aFeature);
 721
 722       // End points (if any)
 723       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 724       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 725
 726       std::list<FeaturePtr> aChain;
 727       aChain.push_back(aFeature);
 728       bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet,
 729                                      aProcessedEdgesSet, aChain, true);
 730       if (!isClosed) {
 731         findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet,
 732                        aProcessedEdgesSet, aChain, false);
 733       }
 734
 735       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 736       for (; aChainIt != aChain.end(); ++aChainIt) {
 737         FeaturePtr aChainFeature = (*aChainIt);
 738         if (aSelectedSet.find(aChainFeature) == aSelectedSet.end()) {
 739           aSelectedEdges->append(aChainFeature->lastResult());
 740         }
 741       }
 742     }
 743   }
 744   // TODO: hilight selection in the viewer
 745
 746   data()->blockSendAttributeUpdated(aWasBlocked);
 747   return true;
 748 }
 749
 750
 751 AISObjectPtr SketchPlugin_Offset::getAISObject(AISObjectPtr thePrevious)
 752 {
 753   if (!sketch())
 754     return thePrevious;
 755
 756   AISObjectPtr anAIS = SketcherPrs_Factory::offsetObject(this, sketch(),
 757     thePrevious);
 758   return anAIS;
 759 }