src/SketchPlugin/SketchPlugin_Offset.cpp

   1 // Copyright (C) 2020-2024  CEA, EDF
   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_AttributeString.h>
  44 #include <ModelAPI_Events.h>
  45 #include <ModelAPI_ResultConstruction.h>
  46 #include <ModelAPI_Tools.h>
  47 #include <ModelAPI_Validator.h>
  48
  49 #include <GeomAlgoAPI_MakeShapeList.h>
  50 #include <GeomAlgoAPI_MapShapesAndAncestors.h>
  51 #include <GeomAlgoAPI_Offset.h>
  52 #include <GeomAlgoAPI_ShapeTools.h>
  53 #include <GeomAlgoAPI_WireBuilder.h>
  54 #include <GeomAlgoAPI_Fillet1D.h>
  55 #include <GeomAlgoAPI_Tools.h>
  56
  57 #include <GeomAPI_BSpline.h>
  58 #include <GeomAPI_Circ.h>
  59 #include <GeomAPI_Edge.h>
  60 #include <GeomAPI_Ellipse.h>
  61 #include <GeomAPI_ShapeExplorer.h>
  62 #include <GeomAPI_Wire.h>
  63 #include <GeomAPI_WireExplorer.h>
  64
  65 #include <GeomDataAPI_Point2D.h>
  66 #include <GeomDataAPI_Point2DArray.h>
  67
  68 #include <math.h>
  69
  70 static const double tolerance = 1.e-7;
  71
  72 SketchPlugin_Offset::SketchPlugin_Offset()
  73 {
  74 }
  75
  76 void SketchPlugin_Offset::initAttributes()
  77 {
  78   AttributeRefListPtr anEdgesAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>
  79     (data()->addAttribute(EDGES_ID(), ModelAPI_AttributeRefList::typeId())); // #1
  80   data()->addAttribute(VALUE_ID(), ModelAPI_AttributeDouble::typeId());      // #2
  81   data()->addAttribute(REVERSED_ID(), ModelAPI_AttributeBoolean::typeId());  // #3
  82
  83   // SketchPlugin_Constraint::ENTITY_A() stores original entities
  84   AttributeRefListPtr entaAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>
  85     (data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(),
  86                           ModelAPI_AttributeRefList::typeId())); // #4
  87
  88   bool badOrder = false;
  89   if (anEdgesAttr->isInitialized()) { // restoring data from saved study
  90     badOrder = !entaAttr->isInitialized();
  91     // we have not found AttributeRefList at 4th position,
  92     // so, we suppose a study with wrong order of offset attributes
  93   }
  94
  95   AttributeBooleanPtr approxAttr;
  96   if (badOrder) {
  97     // It is a fix for 37570 Tuleap issue.
  98     // We could have studies with approxAttr at the 4th position.
  99     // Using directly attribute index 4, we create approxAttr on label #4,
 100     // otherwise (with default -1 index) it would be created on the next one.
 101     approxAttr = std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>
 102       (data()->addAttribute(APPROX_ID(),
 103                             ModelAPI_AttributeBoolean::typeId(),
 104                             4)); // #4
 105
 106     entaAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>
 107       (data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(),
 108                             ModelAPI_AttributeRefList::typeId(),
 109                             5)); // #5
 110   }
 111
 112   // store offset entities
 113   data()->addAttribute(SketchPlugin_Constraint::ENTITY_B(), ModelAPI_AttributeRefList::typeId());
 114   // store mapping between original entity and index of the corresponding offset entity
 115   data()->addAttribute(SketchPlugin_Constraint::ENTITY_C(), ModelAPI_AttributeIntArray::typeId());
 116
 117   ModelAPI_Session::get()->validators()->
 118       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_A());
 119   ModelAPI_Session::get()->validators()->
 120       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_B());
 121   ModelAPI_Session::get()->validators()->
 122       registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_C());
 123
 124   AttributeStringPtr aJointAttr = std::dynamic_pointer_cast<ModelAPI_AttributeString>
 125     (data()->addAttribute(JOINT_ID(), ModelAPI_AttributeString::typeId()));
 126   if (!aJointAttr->isInitialized())
 127     aJointAttr->setValue(JOINT_KEEP_DISTANCE());
 128
 129   if (!badOrder) {
 130     // Good place for approxAttr is here
 131     approxAttr = std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>
 132       (data()->addAttribute(APPROX_ID(), ModelAPI_AttributeBoolean::typeId()));
 133   }
 134
 135   // Initialize approximation to false by default for backward compatibility
 136   if (!approxAttr->isInitialized())
 137     approxAttr->setValue(false);
 138 }
 139
 140 void SketchPlugin_Offset::execute()
 141 {
 142   SketchPlugin_Sketch* aSketch = sketch();
 143   if (!aSketch) return;
 144
 145   // 0. Joint type
 146   AttributeStringPtr aJointAttr = string(JOINT_ID());
 147   std::string aType = JOINT_KEEP_DISTANCE();
 148   if (aJointAttr->isInitialized())
 149     aType = aJointAttr->value();
 150
 151   GeomAlgoAPI_OffsetJoint aJoint;
 152   if (aType == JOINT_ARCS())
 153     aJoint = GeomAlgoAPI_OffsetJoint::Arcs;
 154   else if (aType == JOINT_LINES())
 155     aJoint = GeomAlgoAPI_OffsetJoint::Lines;
 156   else // Default mode
 157     aJoint = GeomAlgoAPI_OffsetJoint::KeepDistance;
 158
 159   // 1. Sketch plane
 160   std::shared_ptr<GeomAPI_Pln> aPlane = aSketch->plane();
 161
 162   // 2. Offset value
 163   AttributeDoublePtr aValueAttr = real(VALUE_ID());
 164   if (!aValueAttr->isInitialized()) return;
 165   double aValue = aValueAttr->value();
 166   if (aValue < tolerance) return;
 167
 168   // 2.a. Reversed?
 169   AttributeBooleanPtr aReversedAttr = boolean(REVERSED_ID());
 170   if (!aReversedAttr->isInitialized()) return;
 171   if (aReversedAttr->value()) aValue = -aValue; // reverse offset direction
 172
 173   // 3. List of all selected edges
 174   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 175   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 176
 177   // 4. Put all selected edges in a set to pass them into findWireOneWay() below
 178   std::set<FeaturePtr> anEdgesSet;
 179   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 180   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 181     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 182     if (aFeature) {
 183       anEdgesSet.insert(aFeature);
 184     }
 185   }
 186
 187   // Wait all objects being created, then send update events
 188   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 189   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
 190   if (isUpdateFlushed)
 191     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
 192
 193   // Save the current feature of the document, because new features may appear while executing.
 194   // In this case, they will become current. But if the number of copies is updated from outside
 195   // of sketch (e.g. by parameter change), the history line should not hold in sketch.
 196   keepCurrentFeature();
 197
 198   // 5. Gather wires and make offset for each wire
 199   ListOfMakeShape anOffsetAlgos;
 200   std::set<FeaturePtr> aProcessedEdgesSet;
 201   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 202     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 203     if (aFeature.get()) {
 204       if (aProcessedEdgesSet.find(aFeature) != aProcessedEdgesSet.end())
 205         continue;
 206
 207       // 5.a. End points (if any)
 208       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 209       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 210
 211       // 5.b. Find a chain of edges
 212       std::list<FeaturePtr> aChain;
 213       aChain.push_back(aFeature);
 214       bool isClosed = !(aStartPoint && anEndPoint);  // not closed edge
 215       if (!isClosed) {
 216         isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet,
 217                                   aProcessedEdgesSet, aChain, true);
 218         if (!isClosed) {
 219           isClosed = findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet,
 220                                     aProcessedEdgesSet, aChain, false);
 221         }
 222       }
 223       aProcessedEdgesSet.insert(aFeature);
 224
 225       // 5.c. Make wire
 226       ListOfShape aTopoChain;
 227       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 228       for (; aChainIt != aChain.end(); ++aChainIt) {
 229         FeaturePtr aChainFeature = (*aChainIt);
 230         GeomShapePtr aTopoEdge = aChainFeature->lastResult()->shape();
 231         if (aTopoEdge->shapeType() == GeomAPI_Shape::EDGE) {
 232           aTopoChain.push_back(aTopoEdge);
 233         }
 234       }
 235       std::shared_ptr<GeomAlgoAPI_WireBuilder> aWireBuilder(
 236           new GeomAlgoAPI_WireBuilder(aTopoChain, !isClosed));
 237
 238       GeomShapePtr aWireShape = aWireBuilder->shape();
 239       GeomWirePtr aWire (new GeomAPI_Wire (aWireShape));
 240
 241       // Fix for a problem of offset side change with selection change.
 242       // Wire direction is defined by the first selected edge of this wire.
 243       double aSign = 1.;
 244       if (!aWire->isClosed()) {
 245         ListOfShape aModified;
 246         // First selected edge of current chain
 247         GeomShapePtr aFirstSel = aFeature->lastResult()->shape();
 248         aWireBuilder->modified(aFirstSel, aModified);
 249         GeomShapePtr aModFS = aModified.front();
 250         if (aModFS->orientation() != aFirstSel->orientation())
 251           aSign = -1.;
 252       }
 253
 254       // 5.d. Make offset for the wire
 255       AttributeBooleanPtr anApproxAttr = boolean(APPROX_ID());
 256       if (!anApproxAttr->isInitialized())
 257       {
 258         // It must be initialized at least by SketchPlugin_Offset::initAttributes()
 259         return;
 260       }
 261
 262       std::shared_ptr<GeomAlgoAPI_Offset> anOffsetShape
 263         (new GeomAlgoAPI_Offset(aPlane, aWireShape, aValue*aSign, aJoint, anApproxAttr->value()));
 264
 265       if (anOffsetShape->isDone()) {
 266         if (aJoint == GeomAlgoAPI_OffsetJoint::Arcs) {
 267           // For Arcs joint make fillet at all straight edges intersections
 268           // of the wire, resulting from GeomAlgoAPI_Offset algorithm
 269           makeFillet(fabs(aValue), aWireBuilder, anOffsetShape, anOffsetAlgos);
 270         }
 271         else {
 272           std::shared_ptr<GeomAlgoAPI_MakeShapeList> aMakeList (new GeomAlgoAPI_MakeShapeList);
 273           aMakeList->appendAlgo(aWireBuilder);
 274           aMakeList->appendAlgo(anOffsetShape);
 275           anOffsetAlgos.push_back(aMakeList);
 276         }
 277       }
 278       else {
 279         setError("Offset algorithm failed");
 280       }
 281     }
 282   }
 283
 284   // 6. Store offset results.
 285   //    Create sketch feature for each edge of anOffsetShape, and also store
 286   //    created features in CREATED_ID() to remove them on next execute()
 287   addToSketch(anOffsetAlgos);
 288
 289   restoreCurrentFeature();
 290
 291   // send events to update the sub-features by the solver
 292   if (isUpdateFlushed)
 293     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 294 }
 295
 296 bool SketchPlugin_Offset::findWireOneWay (const FeaturePtr& theFirstEdge,
 297                                           const FeaturePtr& theEdge,
 298                                           const std::shared_ptr<GeomDataAPI_Point2D>& theEndPoint,
 299                                           std::set<FeaturePtr>& theEdgesSet,
 300                                           std::set<FeaturePtr>& theProcessedEdgesSet,
 301                                           std::list<FeaturePtr>& theChain,
 302                                           const bool isPrepend)
 303 {
 304   // 1. Find a single edge, coincident to theEndPoint by one of its ends
 305   if (!theEndPoint) return false;
 306
 307   FeaturePtr aNextEdgeFeature;
 308   int nbFound = 0;
 309
 310   std::set<AttributePoint2DPtr> aCoincPoints =
 311       SketchPlugin_Tools::findPointsCoincidentToPoint(theEndPoint);
 312
 313   std::set<AttributePoint2DPtr>::iterator aPointsIt = aCoincPoints.begin();
 314   for (; aPointsIt != aCoincPoints.end(); aPointsIt++) {
 315     AttributePoint2DPtr aP = (*aPointsIt);
 316     FeaturePtr aCoincFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aP->owner());
 317     bool isInSet = (theEdgesSet.find(aCoincFeature) != theEdgesSet.end());
 318
 319     // Condition 0: not auxiliary
 320     if (!isInSet && aCoincFeature->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value())
 321       continue;
 322
 323     // Condition 1: not a point feature
 324     if (aCoincFeature->getKind() != SketchPlugin_Point::ID()) {
 325       // Condition 2: it is not the current edge
 326       if (aCoincFeature != theEdge) {
 327         // Condition 3: it is in the set of interest.
 328         //              Empty set means all sketch edges.
 329         if (isInSet || theEdgesSet.empty()) {
 330           // Condition 4: consider only features with two end points
 331           std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 332           SketchPlugin_SegmentationTools::getFeaturePoints(aCoincFeature, aP1, aP2);
 333           if (aP1 && aP2) {
 334             // Condition 5: consider only features, that have aP as one of they ends.
 335             //              For example, we do not need an arc, coincident to aP by its center.
 336             if (theEndPoint->pnt()->isEqual(aP1->pnt()) ||
 337                 theEndPoint->pnt()->isEqual(aP2->pnt())) {
 338               // Condition 6: only one edge can prolongate the chain. If several, we stop here.
 339               nbFound++;
 340               if (nbFound > 1)
 341                 return false;
 342
 343               // One found
 344               aNextEdgeFeature = aCoincFeature;
 345             }
 346           }
 347         }
 348       }
 349     }
 350   }
 351
 352   // Only one edge can prolongate the chain. If several or none, we stop here.
 353   if (nbFound != 1)
 354     return false;
 355
 356   // 2. So, we have the single edge, that prolongate the chain
 357
 358   // Condition 7: if we reached the very first edge of the chain
 359   if (aNextEdgeFeature == theFirstEdge)
 360     // Closed chain found
 361     return true;
 362
 363   // 3. Add the found edge to the chain
 364   if (isPrepend)
 365     theChain.push_front(aNextEdgeFeature);
 366   else
 367     theChain.push_back(aNextEdgeFeature);
 368   theProcessedEdgesSet.insert(aNextEdgeFeature);
 369
 370   // 4. Which end of aNextEdgeFeature we need to proceed
 371   std::shared_ptr<GeomDataAPI_Point2D> aP1, aP2;
 372   SketchPlugin_SegmentationTools::getFeaturePoints(aNextEdgeFeature, aP1, aP2);
 373   if (aP2->pnt()->isEqual(theEndPoint->pnt())) {
 374     // reversed
 375     aP2 = aP1;
 376   }
 377
 378   // 5. Continue gathering the chain (recursive)
 379   return findWireOneWay (theFirstEdge, aNextEdgeFeature, aP2, theEdgesSet,
 380                          theProcessedEdgesSet, theChain, isPrepend);
 381 }
 382
 383 static void setRefListValue(AttributeRefListPtr theList, int theListSize,
 384                             ObjectPtr theValue, int theIndex)
 385 {
 386   if (theIndex < theListSize) {
 387     ObjectPtr aCur = theList->object(theIndex);
 388     if (aCur != theValue)
 389       theList->substitute(aCur, theValue);
 390   }
 391   else
 392     theList->append(theValue);
 393 }
 394
 395 // Reorder shapes according to the wire's order
 396 static void reorderShapes(ListOfShape& theShapes, GeomShapePtr theWire)
 397 {
 398   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aShapes;
 399   aShapes.insert(theShapes.begin(), theShapes.end());
 400   theShapes.clear();
 401
 402   GeomWirePtr aWire(new GeomAPI_Wire(theWire));
 403   GeomAPI_WireExplorer anExp(aWire);
 404   for (; anExp.more(); anExp.next()) {
 405     GeomShapePtr aCurEdge = anExp.current();
 406     auto aFound = aShapes.find(aCurEdge);
 407     if (aFound != aShapes.end()) {
 408       theShapes.push_back(aCurEdge);
 409       aShapes.erase(aFound);
 410     }
 411   }
 412 }
 413
 414 static void removeLastFromIndex(AttributeRefListPtr theList, int theListSize, int& theLastIndex)
 415 {
 416   if (theLastIndex < theListSize) {
 417     std::set<int> anIndicesToRemove;
 418     for (; theLastIndex < theListSize; ++theLastIndex)
 419       anIndicesToRemove.insert(theLastIndex);
 420     theList->remove(anIndicesToRemove);
 421   }
 422 }
 423
 424 void SketchPlugin_Offset::addToSketch(const ListOfMakeShape& theOffsetAlgos)
 425 {
 426   AttributeRefListPtr aSelectedRefList = reflist(EDGES_ID());
 427   AttributeRefListPtr aBaseRefList = reflist(ENTITY_A());
 428   AttributeRefListPtr anOffsetRefList = reflist(ENTITY_B());
 429   AttributeIntArrayPtr anOffsetToBaseMap = intArray(ENTITY_C());
 430
 431   // compare the list of selected edges and the previously stored,
 432   // and store maping between them
 433   std::map<ObjectPtr, std::list<ObjectPtr> > aMapExistent;
 434   std::list<ObjectPtr> anObjectsToRemove;
 435   std::list<ObjectPtr> aSelectedList = aSelectedRefList->list();
 436   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 437        aSIt != aSelectedList.end(); ++aSIt) {
 438     aMapExistent[*aSIt] = std::list<ObjectPtr>();
 439   }
 440   for (int anIndex = 0, aSize = anOffsetRefList->size(); anIndex < aSize; ++anIndex) {
 441     ObjectPtr aCurrent = anOffsetRefList->object(anIndex);
 442     int aBaseIndex = anOffsetToBaseMap->value(anIndex);
 443     if (aBaseIndex >= 0) {
 444       ObjectPtr aBaseObj = aBaseRefList->object(aBaseIndex);
 445       std::map<ObjectPtr, std::list<ObjectPtr> >::iterator aFound = aMapExistent.find(aBaseObj);
 446       if (aFound != aMapExistent.end())
 447         aFound->second.push_back(aCurrent);
 448       else
 449         anObjectsToRemove.push_back(aCurrent);
 450     }
 451     else
 452       anObjectsToRemove.push_back(aCurrent);
 453   }
 454
 455   // update lists of base shapes and of offset shapes
 456   int aBaseListSize = aBaseRefList->size();
 457   int anOffsetListSize = anOffsetRefList->size();
 458   int aBaseListIndex = 0, anOffsetListIndex = 0;
 459   std::list<int> anOffsetBaseBackRefs;
 460   std::set<GeomShapePtr, GeomAPI_Shape::ComparatorWithOri> aProcessedOffsets;
 461   for (std::list<ObjectPtr>::iterator aSIt = aSelectedList.begin();
 462        aSIt != aSelectedList.end(); ++aSIt) {
 463     // find an offseted edge
 464     FeaturePtr aBaseFeature = ModelAPI_Feature::feature(*aSIt);
 465     GeomShapePtr aBaseShape = aBaseFeature->lastResult()->shape();
 466     ListOfShape aNewShapes;
 467     for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 468          anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 469       (*anAlgoIt)->generated(aBaseShape, aNewShapes);
 470       if (!aNewShapes.empty()) {
 471         reorderShapes(aNewShapes, (*anAlgoIt)->shape());
 472         break;
 473       }
 474     }
 475
 476     // store base feature
 477     setRefListValue(aBaseRefList, aBaseListSize, *aSIt, aBaseListIndex);
 478
 479     // create or update an offseted feature
 480     const std::list<ObjectPtr>& anImages = aMapExistent[*aSIt];
 481     std::list<ObjectPtr>::const_iterator anImgIt = anImages.begin();
 482     for (ListOfShape::iterator aNewIt = aNewShapes.begin(); aNewIt != aNewShapes.end(); ++aNewIt) {
 483       FeaturePtr aNewFeature;
 484       if (anImgIt != anImages.end())
 485         aNewFeature = ModelAPI_Feature::feature(*anImgIt++);
 486       updateExistentOrCreateNew(*aNewIt, aNewFeature, anObjectsToRemove);
 487       aProcessedOffsets.insert(*aNewIt);
 488
 489       // store an offseted feature
 490       setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 491
 492       anOffsetBaseBackRefs.push_back(aBaseListIndex);
 493       ++anOffsetListIndex;
 494     }
 495     ++aBaseListIndex;
 496     anObjectsToRemove.insert(anObjectsToRemove.end(), anImgIt, anImages.end());
 497   }
 498   // create arcs generated from vertices
 499   for (ListOfMakeShape::const_iterator anAlgoIt = theOffsetAlgos.begin();
 500        anAlgoIt != theOffsetAlgos.end(); ++anAlgoIt) {
 501     GeomShapePtr aCurWire = (*anAlgoIt)->shape();
 502     GeomAPI_ShapeExplorer anExp(aCurWire, GeomAPI_Shape::EDGE);
 503     for (; anExp.more(); anExp.next()) {
 504       GeomShapePtr aCurEdge = anExp.current();
 505       if (aProcessedOffsets.find(aCurEdge) == aProcessedOffsets.end()) {
 506         FeaturePtr aNewFeature;
 507         updateExistentOrCreateNew(aCurEdge, aNewFeature, anObjectsToRemove);
 508         aProcessedOffsets.insert(aCurEdge);
 509
 510         // store an offseted feature
 511         setRefListValue(anOffsetRefList, anOffsetListSize, aNewFeature, anOffsetListIndex);
 512
 513         anOffsetBaseBackRefs.push_back(-1);
 514         ++anOffsetListIndex;
 515       }
 516     }
 517   }
 518
 519   removeLastFromIndex(aBaseRefList, aBaseListSize, aBaseListIndex);
 520   removeLastFromIndex(anOffsetRefList, anOffsetListSize, anOffsetListIndex);
 521
 522   anOffsetToBaseMap->setSize((int)anOffsetBaseBackRefs.size(), false);
 523   int anIndex = 0;
 524   for (std::list<int>::iterator anIt = anOffsetBaseBackRefs.begin();
 525        anIt != anOffsetBaseBackRefs.end(); ++anIt) {
 526     anOffsetToBaseMap->setValue(anIndex++, *anIt, false);
 527   }
 528
 529   // remove unused objects
 530   std::set<FeaturePtr> aSet;
 531   for (std::list<ObjectPtr>::iterator anIt = anObjectsToRemove.begin();
 532        anIt != anObjectsToRemove.end(); ++anIt) {
 533     FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 534     if (aFeature)
 535       aSet.insert(aFeature);
 536   }
 537   ModelAPI_Tools::removeFeaturesAndReferences(aSet);
 538 }
 539
 540 static void findOrCreateFeatureByKind(SketchPlugin_Sketch* theSketch,
 541                                       const std::string& theFeatureKind,
 542                                       FeaturePtr& theFeature,
 543                                       std::list<ObjectPtr>& thePoolOfFeatures)
 544 {
 545   if (theFeature) {
 546     // check the feature type is the same as required
 547     if (theFeature->getKind() != theFeatureKind) {
 548       // return feature to the pool and try to find the most appropriate
 549       thePoolOfFeatures.push_back(theFeature);
 550       theFeature = FeaturePtr();
 551     }
 552   }
 553   if (!theFeature) {
 554     // try to find appropriate feature in the pool
 555     for (std::list<ObjectPtr>::iterator it = thePoolOfFeatures.begin();
 556          it != thePoolOfFeatures.end(); ++it) {
 557       FeaturePtr aCurFeature = ModelAPI_Feature::feature(*it);
 558       if (aCurFeature->getKind() == theFeatureKind) {
 559         theFeature = aCurFeature;
 560         thePoolOfFeatures.erase(it);
 561         break;
 562       }
 563     }
 564     // feature not found, create new
 565     if (!theFeature)
 566       theFeature = theSketch->addFeature(theFeatureKind);
 567   }
 568 }
 569
 570 void SketchPlugin_Offset::updateExistentOrCreateNew(const GeomShapePtr& theShape,
 571                                                     FeaturePtr& theFeature,
 572                                                     std::list<ObjectPtr>& thePoolOfFeatures)
 573 {
 574   if (theShape->shapeType() != GeomAPI_Shape::EDGE)
 575     return;
 576
 577   std::shared_ptr<GeomAPI_Edge> aResEdge(new GeomAPI_Edge(theShape));
 578
 579   std::shared_ptr<GeomAPI_Pnt2d> aFP, aLP;
 580   std::shared_ptr<GeomAPI_Pnt> aFP3d = aResEdge->firstPoint();
 581   std::shared_ptr<GeomAPI_Pnt> aLP3d = aResEdge->lastPoint();
 582   if (aFP3d && aLP3d) {
 583     aFP = sketch()->to2D(aFP3d);
 584     aLP = sketch()->to2D(aLP3d);
 585   }
 586
 587   if (aResEdge->isLine()) {
 588     findOrCreateFeatureByKind(sketch(), SketchPlugin_Line::ID(), theFeature, thePoolOfFeatures);
 589
 590     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 591       (theFeature->attribute(SketchPlugin_Line::START_ID()))->setValue(aFP);
 592     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 593       (theFeature->attribute(SketchPlugin_Line::END_ID()))->setValue(aLP);
 594   }
 595   else if (aResEdge->isArc()) {
 596     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 597     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 598     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 599
 600     findOrCreateFeatureByKind(sketch(), SketchPlugin_Arc::ID(), theFeature, thePoolOfFeatures);
 601
 602     GeomDirPtr aCircNormal = aCircEdge->normal();
 603     GeomDirPtr aSketchNormal = sketch()->coordinatePlane()->normal();
 604     if (aSketchNormal->dot(aCircNormal) < -tolerance)
 605       std::swap(aFP, aLP);
 606
 607     bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 608     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 609       (theFeature->attribute(SketchPlugin_Arc::END_ID()))->setValue(aLP);
 610     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 611       (theFeature->attribute(SketchPlugin_Arc::START_ID()))->setValue(aFP);
 612     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 613       (theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCP);
 614     theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 615   }
 616   else if (aResEdge->isCircle()) {
 617     std::shared_ptr<GeomAPI_Circ> aCircEdge = aResEdge->circle();
 618     std::shared_ptr<GeomAPI_Pnt> aCP3d = aCircEdge->center();
 619     std::shared_ptr<GeomAPI_Pnt2d> aCP = sketch()->to2D(aCP3d);
 620
 621     findOrCreateFeatureByKind(sketch(), SketchPlugin_Circle::ID(), theFeature, thePoolOfFeatures);
 622
 623     std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 624       (theFeature->attribute(SketchPlugin_Circle::CENTER_ID()))->setValue(aCP);
 625     theFeature->real(SketchPlugin_Circle::RADIUS_ID())->setValue(aCircEdge->radius());
 626   }
 627   else if (aResEdge->isEllipse()) {
 628     std::shared_ptr<GeomAPI_Ellipse> anEllipseEdge = aResEdge->ellipse();
 629
 630     GeomPointPtr aCP3d = anEllipseEdge->center();
 631     GeomPnt2dPtr aCP = sketch()->to2D(aCP3d);
 632
 633     GeomPointPtr aFocus3d = anEllipseEdge->firstFocus();
 634     GeomPnt2dPtr aFocus = sketch()->to2D(aFocus3d);
 635
 636     if (aFP3d && aLP3d) {
 637       // Elliptic arc
 638       findOrCreateFeatureByKind(sketch(), SketchPlugin_EllipticArc::ID(),
 639                                 theFeature, thePoolOfFeatures);
 640
 641       bool aWasBlocked = theFeature->data()->blockSendAttributeUpdated(true);
 642       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 643         (theFeature->attribute(SketchPlugin_EllipticArc::CENTER_ID()))->setValue(aCP);
 644       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 645         (theFeature->attribute(SketchPlugin_EllipticArc::FIRST_FOCUS_ID()))->setValue(aFocus);
 646       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 647         (theFeature->attribute(SketchPlugin_EllipticArc::START_POINT_ID()))->setValue(aFP);
 648       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 649         (theFeature->attribute(SketchPlugin_EllipticArc::END_POINT_ID()))->setValue(aLP);
 650       theFeature->data()->blockSendAttributeUpdated(aWasBlocked);
 651     }
 652     else {
 653       // Ellipse
 654       findOrCreateFeatureByKind(sketch(), SketchPlugin_Ellipse::ID(),
 655                                 theFeature, thePoolOfFeatures);
 656
 657       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 658         (theFeature->attribute(SketchPlugin_Ellipse::CENTER_ID()))->setValue(aCP);
 659       std::dynamic_pointer_cast<GeomDataAPI_Point2D>
 660         (theFeature->attribute(SketchPlugin_Ellipse::FIRST_FOCUS_ID()))->setValue(aFocus);
 661       theFeature->real(SketchPlugin_Ellipse::MINOR_RADIUS_ID())->setValue(
 662         anEllipseEdge->minorRadius());
 663     }
 664   }
 665   else {
 666     // convert to b-spline
 667     mkBSpline(theFeature, aResEdge, thePoolOfFeatures);
 668   }
 669
 670   if (theFeature.get()) {
 671     theFeature->boolean(SketchPlugin_SketchEntity::COPY_ID())->setValue(true);
 672     theFeature->execute();
 673
 674     static Events_ID aRedisplayEvent = Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY);
 675     ModelAPI_EventCreator::get()->sendUpdated(theFeature, aRedisplayEvent);
 676     const std::list<ResultPtr>& aResults = theFeature->results();
 677     for (std::list<ResultPtr>::const_iterator anIt = aResults.begin();
 678          anIt != aResults.end(); ++anIt)
 679       ModelAPI_EventCreator::get()->sendUpdated(*anIt, aRedisplayEvent);
 680   }
 681 }
 682
 683 void SketchPlugin_Offset::mkBSpline (FeaturePtr& theResult,
 684                                      const GeomEdgePtr& theEdge,
 685                                      std::list<ObjectPtr>& thePoolOfFeatures)
 686 {
 687   GeomCurvePtr aCurve (new GeomAPI_Curve (theEdge));
 688   // Forced conversion to b-spline, if aCurve is not b-spline
 689   GeomBSplinePtr aBSpline = GeomAPI_BSpline::convertToBSpline(aCurve);
 690
 691   const std::string& aBSplineKind = aBSpline->isPeriodic() ? SketchPlugin_BSplinePeriodic::ID()
 692                                                            : SketchPlugin_BSpline::ID();
 693   findOrCreateFeatureByKind(sketch(), aBSplineKind, theResult, thePoolOfFeatures);
 694
 695   theResult->integer(SketchPlugin_BSpline::DEGREE_ID())->setValue(aBSpline->degree());
 696
 697   AttributePoint2DArrayPtr aPolesAttr = std::dynamic_pointer_cast<GeomDataAPI_Point2DArray>
 698     (theResult->attribute(SketchPlugin_BSpline::POLES_ID()));
 699   std::list<GeomPointPtr> aPoles = aBSpline->poles();
 700   aPolesAttr->setSize((int)aPoles.size());
 701   std::list<GeomPointPtr>::iterator anIt = aPoles.begin();
 702   for (int anIndex = 0; anIt != aPoles.end(); ++anIt, ++anIndex) {
 703     GeomPnt2dPtr aPoleInSketch = sketch()->to2D(*anIt);
 704     aPolesAttr->setPnt(anIndex, aPoleInSketch);
 705   }
 706
 707   AttributeDoubleArrayPtr aWeightsAttr =
 708       theResult->data()->realArray(SketchPlugin_BSpline::WEIGHTS_ID());
 709   std::list<double> aWeights = aBSpline->weights();
 710   if (aWeights.empty()) { // rational B-spline
 711     int aSize = (int)aPoles.size();
 712     aWeightsAttr->setSize(aSize);
 713     for (int anIndex = 0; anIndex < aSize; ++anIndex)
 714       aWeightsAttr->setValue(anIndex, 1.0);
 715   }
 716   else { // non-rational B-spline
 717     aWeightsAttr->setSize((int)aWeights.size());
 718     std::list<double>::iterator aWIt = aWeights.begin();
 719     for (int anIndex = 0; aWIt != aWeights.end(); ++aWIt, ++anIndex)
 720       aWeightsAttr->setValue(anIndex, *aWIt);
 721   }
 722
 723   AttributeDoubleArrayPtr aKnotsAttr =
 724       theResult->data()->realArray(SketchPlugin_BSpline::KNOTS_ID());
 725   std::list<double> aKnots = aBSpline->knots();
 726   int aSize = (int)aKnots.size();
 727   aKnotsAttr->setSize(aSize);
 728   std::list<double>::iterator aKIt = aKnots.begin();
 729   for (int index = 0; index < aSize; ++index, ++aKIt)
 730     aKnotsAttr->setValue(index, *aKIt);
 731
 732   AttributeIntArrayPtr aMultsAttr =
 733       theResult->data()->intArray(SketchPlugin_BSpline::MULTS_ID());
 734   std::list<int> aMultiplicities = aBSpline->mults();
 735   aSize = (int)aMultiplicities.size();
 736   aMultsAttr->setSize(aSize);
 737   std::list<int>::iterator aMIt = aMultiplicities.begin();
 738   for (int index = 0; index < aSize; ++index, ++aMIt)
 739     aMultsAttr->setValue(index, *aMIt);
 740 }
 741
 742 void SketchPlugin_Offset::attributeChanged(const std::string& theID)
 743 {
 744   if (theID == EDGES_ID()) {
 745     AttributeRefListPtr aSelected = reflist(EDGES_ID());
 746     if (aSelected->size() == 0) {
 747       // Clear list of objects
 748       AttributeRefListPtr anOffsetAttr = reflist(SketchPlugin_Constraint::ENTITY_B());
 749       std::list<ObjectPtr> anOffsetList = anOffsetAttr->list();
 750       std::set<FeaturePtr> aFeaturesToBeRemoved;
 751       for (std::list<ObjectPtr>::iterator anIt = anOffsetList.begin();
 752            anIt != anOffsetList.end(); ++anIt) {
 753         FeaturePtr aFeature = ModelAPI_Feature::feature(*anIt);
 754         if (aFeature)
 755           aFeaturesToBeRemoved.insert(aFeature);
 756       }
 757
 758       reflist(SketchPlugin_Constraint::ENTITY_A())->clear();
 759       anOffsetAttr->clear();
 760       intArray(SketchPlugin_Constraint::ENTITY_C())->setSize(0);
 761
 762       ModelAPI_Tools::removeFeaturesAndReferences(aFeaturesToBeRemoved);
 763     }
 764   }
 765 }
 766
 767 bool SketchPlugin_Offset::customAction(const std::string& theActionId)
 768 {
 769   bool isOk = false;
 770   if (theActionId == ADD_WIRE_ACTION_ID()) {
 771     isOk = findWires();
 772   }
 773   else {
 774     std::string aMsg = "Error: Feature \"%1\" does not support action \"%2\".";
 775     Events_InfoMessage("SketchPlugin_Offset", aMsg).arg(getKind()).arg(theActionId).send();
 776   }
 777   return isOk;
 778 }
 779
 780 bool SketchPlugin_Offset::findWires()
 781 {
 782   AttributeRefListPtr aSelectedEdges = reflist(EDGES_ID());
 783   std::list<ObjectPtr> anEdgesList = aSelectedEdges->list();
 784
 785   // Empty set
 786   std::set<FeaturePtr> anEdgesSet;
 787
 788   // Processed set
 789   std::set<FeaturePtr> aProcessedEdgesSet;
 790
 791   // Put all selected edges in a set to avoid adding them in reflist(EDGES_ID())
 792   std::set<FeaturePtr> aSelectedSet;
 793   std::list<ObjectPtr>::const_iterator anEdgesIt = anEdgesList.begin();
 794   for (; anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 795     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 796     if (aFeature) {
 797       aSelectedSet.insert(aFeature);
 798     }
 799   }
 800
 801   bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 802
 803   // Gather chains of edges
 804   for (anEdgesIt = anEdgesList.begin(); anEdgesIt != anEdgesList.end(); anEdgesIt++) {
 805     FeaturePtr aFeature = ModelAPI_Feature::feature(*anEdgesIt);
 806     if (aFeature.get()) {
 807       if (aProcessedEdgesSet.find(aFeature) != aProcessedEdgesSet.end())
 808         continue;
 809       aProcessedEdgesSet.insert(aFeature);
 810
 811       // End points (if any)
 812       std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, anEndPoint;
 813       SketchPlugin_SegmentationTools::getFeaturePoints(aFeature, aStartPoint, anEndPoint);
 814
 815       std::list<FeaturePtr> aChain;
 816       aChain.push_back(aFeature);
 817       bool isClosed = findWireOneWay(aFeature, aFeature, aStartPoint, anEdgesSet,
 818                                      aProcessedEdgesSet, aChain, true);
 819       if (!isClosed) {
 820         findWireOneWay(aFeature, aFeature, anEndPoint, anEdgesSet,
 821                        aProcessedEdgesSet, aChain, false);
 822       }
 823
 824       std::list<FeaturePtr>::iterator aChainIt = aChain.begin();
 825       for (; aChainIt != aChain.end(); ++aChainIt) {
 826         FeaturePtr aChainFeature = (*aChainIt);
 827         if (aSelectedSet.find(aChainFeature) == aSelectedSet.end()) {
 828           aSelectedEdges->append(aChainFeature->lastResult());
 829         }
 830       }
 831     }
 832   }
 833
 834   data()->blockSendAttributeUpdated(aWasBlocked);
 835   return true;
 836 }
 837
 838
 839 AISObjectPtr SketchPlugin_Offset::getAISObject(AISObjectPtr thePrevious)
 840 {
 841   if (!sketch())
 842     return thePrevious;
 843
 844   AISObjectPtr anAIS = SketcherPrs_Factory::offsetObject(this, sketch(),
 845     thePrevious);
 846   return anAIS;
 847 }
 848
 849
 850 void SketchPlugin_Offset::makeFillet
 851      (const double theValue,
 852       const std::shared_ptr<GeomAlgoAPI_WireBuilder>& theWireBuilder,
 853       const std::shared_ptr<GeomAlgoAPI_Offset>& theOffsetShape,
 854       ListOfMakeShape& theOffsetAlgos)
 855 {
 856   std::shared_ptr<GeomAlgoAPI_MakeShapeList> aMakeList (new GeomAlgoAPI_MakeShapeList);
 857   aMakeList->appendAlgo(theWireBuilder);
 858   aMakeList->appendAlgo(theOffsetShape);
 859
 860   bool isOK = true;
 861
 862   GeomShapePtr aResWire = theOffsetShape->shape();
 863   GeomAlgoAPI_MapShapesAndAncestors aMapVE
 864     (aResWire, GeomAPI_Shape::VERTEX, GeomAPI_Shape::EDGE);
 865   const MapShapeToShapes& aSubshapes = aMapVE.map();
 866
 867   // find vertices for fillet
 868   std::set<GeomShapePtr, GeomAPI_Shape::Comparator> aFilletVertices;
 869   for (MapShapeToShapes::const_iterator anIt = aSubshapes.begin();
 870        anIt != aSubshapes.end(); ++anIt) {
 871     // vertex should have 2 adjacent edges
 872     if (anIt->second.size() != 2)
 873       continue;
 874
 875     // both edges should be linear
 876     ListOfShape anEdges;
 877     anEdges.insert(anEdges.end(), anIt->second.begin(), anIt->second.end());
 878     GeomEdgePtr anEdge1 (new GeomAPI_Edge(anEdges.front()));
 879     GeomEdgePtr anEdge2 (new GeomAPI_Edge(anEdges.back()));
 880     if (!anEdge1->isLine() || !anEdge2->isLine())
 881       continue;
 882
 883     // skip vertices, which smoothly connect adjacent edges
 884     GeomVertexPtr aSharedVertex(new GeomAPI_Vertex(anIt->first));
 885     if (GeomAlgoAPI_ShapeTools::isTangent(anEdge1, anEdge2, aSharedVertex))
 886       continue;
 887
 888     aFilletVertices.insert(anIt->first);
 889   }
 890
 891   if (!aFilletVertices.empty()) {
 892     isOK = false; // the wire needs correction
 893     ListOfShape aVerticesList (aFilletVertices.begin(), aFilletVertices.end());
 894
 895     // Fillet1D on all linear edges intersections
 896     std::shared_ptr<GeomAlgoAPI_Fillet1D> aFilletBuilder
 897       (new GeomAlgoAPI_Fillet1D(aResWire, aVerticesList, theValue));
 898
 899     std::string anError;
 900     if (!GeomAlgoAPI_Tools::AlgoError::isAlgorithmFailed
 901         (aFilletBuilder, getKind(), anError)) {
 902       aMakeList->appendAlgo(aFilletBuilder);
 903       isOK = true;
 904     }
 905     else {
 906       ListOfShape aFailedVertices = aFilletBuilder->failedVertices();
 907       if (aFailedVertices.size() != 0) {
 908         // Exclude failed vertices and also vertices, joined
 909         // with failed by one edge, and run algorithm once again
 910         ListOfShape::iterator itVertices = aFailedVertices.begin();
 911         for (; itVertices != aFailedVertices.end(); itVertices++) {
 912           GeomShapePtr aFailedVertex = *itVertices;
 913           aFilletVertices.erase(aFailedVertex);
 914           // remove also neighbour vertices
 915           MapShapeToShapes::const_iterator anIt = aSubshapes.find(aFailedVertex);
 916           if (anIt != aSubshapes.end()) { // should be always true
 917             ListOfShape anEdges;
 918             anEdges.insert(anEdges.end(), anIt->second.begin(), anIt->second.end());
 919             GeomEdgePtr anEdge1 (new GeomAPI_Edge(anEdges.front()));
 920             GeomEdgePtr anEdge2 (new GeomAPI_Edge(anEdges.back()));
 921             GeomVertexPtr V1, V2;
 922             anEdge1->vertices(V1, V2);
 923             if (V1->isEqual(aFailedVertex)) V1 = V2;
 924             aFilletVertices.erase(V1);
 925             anEdge2->vertices(V1, V2);
 926             if (V1->isEqual(aFailedVertex)) V1 = V2;
 927             aFilletVertices.erase(V1);
 928           }
 929         }
 930         if (aFilletVertices.size() == 0) {
 931           // there are no suitable vertices for fillet
 932           isOK = true;
 933         }
 934         else {
 935           // Fillet1D one more try
 936           ListOfShape aVerticesList1 (aFilletVertices.begin(), aFilletVertices.end());
 937
 938           std::shared_ptr<GeomAlgoAPI_Fillet1D> aFilletBuilder1
 939             (new GeomAlgoAPI_Fillet1D(aResWire, aVerticesList1, theValue));
 940
 941           if (!GeomAlgoAPI_Tools::AlgoError::isAlgorithmFailed
 942               (aFilletBuilder1, getKind(), anError)) {
 943             aMakeList->appendAlgo(aFilletBuilder1);
 944             isOK = true;
 945           }
 946         }
 947       }
 948     }
 949   }
 950
 951   if (isOK)
 952     theOffsetAlgos.push_back(aMakeList);
 953   else
 954     setError("Offset algorithm failed");
 955 }