src/SketchPlugin/SketchPlugin_ConstraintFillet.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D -->
   2
   3 // File:    SketchPlugin_ConstraintFillet.cpp
   4 // Created: 19 Mar 2015
   5 // Author:  Artem ZHIDKOV
   6
   7 #include "SketchPlugin_ConstraintFillet.h"
   8
   9 #include <GeomAPI_Circ2d.h>
  10 #include <GeomAPI_Dir2d.h>
  11 #include <GeomAPI_Lin2d.h>
  12 #include <GeomAPI_Pnt2d.h>
  13 #include <GeomAPI_XY.h>
  14 #include <GeomDataAPI_Point2D.h>
  15 #include <ModelAPI_AttributeDouble.h>
  16 #include <ModelAPI_AttributeRefList.h>
  17 #include <ModelAPI_AttributeRefAttrList.h>
  18 #include <ModelAPI_Data.h>
  19 #include <ModelAPI_Events.h>
  20 #include <ModelAPI_Session.h>
  21 #include <ModelAPI_Validator.h>
  22
  23 #include <SketchPlugin_Arc.h>
  24 #include <SketchPlugin_Line.h>
  25 #include <SketchPlugin_Point.h>
  26 #include <SketchPlugin_Sketch.h>
  27 #include <SketchPlugin_ConstraintCoincidence.h>
  28 #include <SketchPlugin_ConstraintTangent.h>
  29 #include <SketchPlugin_ConstraintRadius.h>
  30 #include <SketchPlugin_Tools.h>
  31
  32 #include <Events_Loop.h>
  33
  34 #include <math.h>
  35
  36 const double tolerance = 1.e-7;
  37 const double paramTolerance = 1.e-4;
  38
  39 /// \brief Attract specified point on theNewArc to the attribute of theFeature
  40 static void recalculateAttributes(FeaturePtr theNewArc, const std::string& theNewArcAttribute,
  41   FeaturePtr theFeature, const std::string& theFeatureAttribute);
  42
  43 /// \brief Calculates center of fillet arc and coordinates of tangency points
  44 static void calculateFilletCenter(FeaturePtr theFeatureA, FeaturePtr theFeatureB,
  45                                   double theRadius, bool theNotInversed[2],
  46                                   std::shared_ptr<GeomAPI_XY>& theCenter,
  47                                   std::shared_ptr<GeomAPI_XY>& theTangentA,
  48                                   std::shared_ptr<GeomAPI_XY>& theTangentB);
  49
  50 /// Get point on 1/3 length of edge from fillet point
  51 static void getPointOnEdge(const FeaturePtr theFeature,
  52                            const std::shared_ptr<GeomAPI_Pnt2d> theFilletPoint,
  53                            std::shared_ptr<GeomAPI_Pnt2d>& thePoint);
  54
  55 /// Get distance from point to feature
  56 static double getProjectionDistance(const FeaturePtr theFeature,
  57                              const std::shared_ptr<GeomAPI_Pnt2d> thePoint);
  58
  59 /// Get coincide edges for fillet
  60 static std::set<FeaturePtr> getCoincides(const FeaturePtr& theConstraintCoincidence);
  61
  62 SketchPlugin_ConstraintFillet::SketchPlugin_ConstraintFillet()
  63 : myListOfPointsChangedInCode(false),
  64   myRadiusChangedByUser(false),
  65   myRadiusChangedInCode(false),
  66   myRadiusInitialized(false)
  67 {
  68 }
  69
  70 void SketchPlugin_ConstraintFillet::initAttributes()
  71 {
  72   data()->addAttribute(SketchPlugin_Constraint::VALUE(), ModelAPI_AttributeDouble::typeId());
  73   data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(), ModelAPI_AttributeRefAttrList::typeId());
  74 }
  75
  76 void SketchPlugin_ConstraintFillet::execute()
  77 {
  78   std::shared_ptr<ModelAPI_Data> aData = data();
  79
  80   // Check the base objects are initialized.
  81   AttributeRefAttrListPtr aPointsRefList = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttrList>(
  82     aData->attribute(SketchPlugin_Constraint::ENTITY_A()));
  83   if(!aPointsRefList->isInitialized()) {
  84     setError("Error: List of points is not initialized.");
  85     return;
  86   }
  87
  88   // Get fillet radius.
  89   double aFilletRadius = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
  90     aData->attribute(SketchPlugin_Constraint::VALUE()))->value();
  91
  92   // Wait all constraints being created, then send update events
  93   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
  94   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
  95   if (isUpdateFlushed)
  96     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
  97
  98   for(std::set<AttributePtr>::iterator aPointsIter = myNewPoints.begin();
  99       aPointsIter != myNewPoints.end();
 100       ++aPointsIter) {
 101     AttributePtr aPointAttr = *aPointsIter;
 102     std::shared_ptr<GeomDataAPI_Point2D> aFilletPoint2d = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aPointAttr);
 103     if(!aFilletPoint2d.get()) {
 104       setError("Error: One of the selected points is empty.");
 105       return;
 106     }
 107     std::shared_ptr<GeomAPI_Pnt2d> aFilletPnt2d = aFilletPoint2d->pnt();
 108
 109     // Obtain base lines for fillet.
 110     bool anIsNeedNewObjects = true;
 111     FilletFeatures aFilletFeatures;
 112     std::map<AttributePtr, FilletFeatures>::iterator aPrevPointsIter = myPointFeaturesMap.find(aPointAttr);
 113     if(aPrevPointsIter != myPointFeaturesMap.end()) {
 114       anIsNeedNewObjects = false;
 115       aFilletFeatures = aPrevPointsIter->second;
 116     }
 117     FeaturePtr aBaseEdgeA, aBaseEdgeB;
 118     if(!anIsNeedNewObjects) {
 119       aBaseEdgeA = aFilletFeatures.baseEdgesState.front().first;
 120       aBaseEdgeB = aFilletFeatures.baseEdgesState.back().first;
 121     } else {
 122       // Obtain constraint coincidence for the fillet point.
 123       FeaturePtr aConstraintCoincidence;
 124       const std::set<AttributePtr>& aRefsList = aFilletPoint2d->owner()->data()->refsToMe();
 125       for(std::set<AttributePtr>::const_iterator anIt = aRefsList.cbegin(); anIt != aRefsList.cend(); ++anIt) {
 126         std::shared_ptr<ModelAPI_Attribute> anAttr = (*anIt);
 127         FeaturePtr aConstrFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(anAttr->owner());
 128         if(aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 129           AttributeRefAttrPtr anAttrRefA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 130             aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_A()));
 131           AttributeRefAttrPtr anAttrRefB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 132             aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_B()));
 133           if(anAttrRefA.get() && !anAttrRefA->isObject()) {
 134             AttributePtr anAttrA = anAttrRefA->attr();
 135             if(aFilletPoint2d == anAttrA) {
 136               aConstraintCoincidence = aConstrFeature;
 137               break;
 138             }
 139           }
 140           if(anAttrRefB.get() && !anAttrRefB->isObject()) {
 141             AttributePtr anAttrB = anAttrRefB->attr();
 142             if(aFilletPoint2d == anAttrB) {
 143               aConstraintCoincidence = aConstrFeature;
 144               break;
 145             }
 146           }
 147         }
 148       }
 149
 150       if(!aConstraintCoincidence.get()) {
 151         setError("Error: No coincident edges at one of the selected points.");
 152         return;
 153       }
 154
 155       // Get coincide edges.
 156       std::set<FeaturePtr> aCoincides = getCoincides(aConstraintCoincidence);
 157       if(aCoincides.size() != 2) {
 158         setError("Error: One of the selected points does not have two suitable edges for fillet.");
 159         return;
 160       }
 161
 162       std::set<FeaturePtr>::iterator aLinesIt = aCoincides.begin();
 163       aBaseEdgeA = *aLinesIt++;
 164       aBaseEdgeB = *aLinesIt;
 165
 166       std::pair<FeaturePtr, bool> aBasePairA = std::make_pair(aBaseEdgeA, aBaseEdgeA->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value());
 167       std::pair<FeaturePtr, bool> aBasePairB = std::make_pair(aBaseEdgeB, aBaseEdgeB->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value());
 168       aFilletFeatures.baseEdgesState.push_back(aBasePairA);
 169       aFilletFeatures.baseEdgesState.push_back(aBasePairB);
 170     }
 171
 172     if(!aBaseEdgeA.get() || !aBaseEdgeB.get()) {
 173       setError("Error: One of the base edges is empty.");
 174       return;
 175     }
 176
 177     // Create new edges and arc if needed.
 178     FeaturePtr aResultEdgeA, aResultEdgeB, aResultArc;
 179     if(!anIsNeedNewObjects) {
 180       // Obtain features from the list.
 181       std::list<FeaturePtr>::iterator aResultEdgesIt = aFilletFeatures.resultEdges.begin();
 182       aResultEdgeA = *aResultEdgesIt++;
 183       aResultEdgeB = *aResultEdgesIt++;
 184       aResultArc = *aResultEdgesIt;
 185     } else {
 186       // Copy edges and create arc.
 187       aResultEdgeA = SketchPlugin_Sketch::addUniqueNamedCopiedFeature(aBaseEdgeA, sketch());
 188       aResultEdgeB = SketchPlugin_Sketch::addUniqueNamedCopiedFeature(aBaseEdgeB, sketch());
 189       aResultArc = sketch()->addFeature(SketchPlugin_Arc::ID());
 190
 191       aFilletFeatures.resultEdges.push_back(aResultEdgeA);
 192       aFilletFeatures.resultEdges.push_back(aResultEdgeB);
 193       aFilletFeatures.resultEdges.push_back(aResultArc);
 194     }
 195
 196     // Calculate arc attributes
 197     static const int aNbFeatures = 2;
 198     FeaturePtr aBaseFeatures[aNbFeatures] = {aBaseEdgeA, aBaseEdgeB};
 199     FeaturePtr aResultFeatures[aNbFeatures] = {aResultEdgeA, aResultEdgeB};
 200     std::shared_ptr<GeomAPI_Dir2d> aTangentDir[aNbFeatures]; // tangent directions of the features in coincident point
 201     bool isStart[aNbFeatures]; // indicates which point the features share
 202     std::shared_ptr<GeomAPI_Pnt2d> aStartEndPnt[aNbFeatures * 2]; // first pair of points relate to first feature, second pair -  to second
 203     std::string aFeatAttributes[aNbFeatures * 2]; // attributes of features
 204     for (int i = 0; i < aNbFeatures; i++) {
 205       std::string aStartAttr, aEndAttr;
 206       if (aResultFeatures[i]->getKind() == SketchPlugin_Line::ID()) {
 207         aStartAttr = SketchPlugin_Line::START_ID();
 208         aEndAttr = SketchPlugin_Line::END_ID();
 209       } else if (aResultFeatures[i]->getKind() == SketchPlugin_Arc::ID()) {
 210         aStartAttr = SketchPlugin_Arc::START_ID();
 211         aEndAttr = SketchPlugin_Arc::END_ID();
 212       } else { // wrong argument
 213         setError("Error: One of the points has wrong coincide feature");
 214         return;
 215       }
 216       aFeatAttributes[2*i] = aStartAttr;
 217       aStartEndPnt[2*i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 218         aBaseFeatures[i]->attribute(aStartAttr))->pnt();
 219       aFeatAttributes[2*i+1] = aEndAttr;
 220       aStartEndPnt[2*i+1] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 221         aBaseFeatures[i]->attribute(aEndAttr))->pnt();
 222     }
 223     for (int aFeatInd = 0; aFeatInd < aNbFeatures; aFeatInd++) {
 224       for (int j = 0; j < 2; j++) // loop on start-end of each feature
 225         if (aStartEndPnt[aFeatInd * aNbFeatures + j]->distance(aFilletPnt2d) < 1.e-10) {
 226           isStart[aFeatInd] = (j==0);
 227           break;
 228         }
 229     }
 230     // tangent directions of the features
 231     for (int i = 0; i < aNbFeatures; i++) {
 232       std::shared_ptr<GeomAPI_XY> aDir;
 233       if (aResultFeatures[i]->getKind() == SketchPlugin_Line::ID()) {
 234         aDir = aStartEndPnt[2*i+1]->xy()->decreased(aStartEndPnt[2*i]->xy());
 235         if (!isStart[i])
 236           aDir = aDir->multiplied(-1.0);
 237       } else if (aResultFeatures[i]->getKind() == SketchPlugin_Arc::ID()) {
 238         std::shared_ptr<GeomAPI_Pnt2d> aCenterPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 239           aResultFeatures[i]->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
 240         aDir = isStart[i] ? aStartEndPnt[2*i]->xy() : aStartEndPnt[2*i+1]->xy();
 241         aDir = aDir->decreased(aCenterPoint->xy());
 242
 243         double x = aDir->x();
 244         double y = aDir->y();
 245         aDir->setX(-y);
 246         aDir->setY(x);
 247         if (isStart[i] == std::dynamic_pointer_cast<SketchPlugin_Arc>(aBaseFeatures[i])->isReversed())
 248           aDir = aDir->multiplied(-1.0);
 249       }
 250       aTangentDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(aDir));
 251     }
 252
 253     // By default, the start point of fillet arc is connected to FeatureA,
 254     // and the end point - to FeatureB. But when the angle between TangentDirA and
 255     // TangentDirB greater 180 degree, the sequaence of features need to be reversed.
 256     double cosBA = aTangentDir[0]->cross(aTangentDir[1]); // cos(B-A), where A and B - angles between corresponding tanget direction and the X axis
 257     bool isReversed = cosBA > 0.0;
 258
 259     // Calculate fillet arc parameters
 260     std::shared_ptr<GeomAPI_XY> aCenter, aTangentPntA, aTangentPntB;
 261     calculateFilletCenter(aBaseEdgeA, aBaseEdgeB, aFilletRadius, isStart, aCenter, aTangentPntA, aTangentPntB);
 262     if(!aCenter.get() || !aTangentPntA.get() || !aTangentPntB.get()) {
 263       setError("Can not create fillet with the specified parameters.");
 264       return;
 265     }
 266     // update features
 267     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 268       aResultEdgeA->attribute(aFeatAttributes[isStart[0] ? 0 : 1]))->setValue(aTangentPntA->x(), aTangentPntA->y());
 269     aResultEdgeA->execute();
 270     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 271       aResultEdgeB->attribute(aFeatAttributes[2 + (isStart[1] ? 0 : 1)]))->setValue(aTangentPntB->x(), aTangentPntB->y());
 272     aResultEdgeB->execute();
 273     // update fillet arc: make the arc correct for sure, so, it is not needed to process the "attribute updated"
 274     // by arc; moreover, it may cause cyclicity in hte mechanism of updater
 275     aResultArc->data()->blockSendAttributeUpdated(true);
 276     std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 277       aResultArc->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(aCenter->x(), aCenter->y());
 278     if(isReversed) {
 279       std::shared_ptr<GeomAPI_XY> aTmp = aTangentPntA;
 280       aTangentPntA = aTangentPntB;
 281       aTangentPntB = aTmp;
 282     }
 283     std::shared_ptr<GeomDataAPI_Point2D> aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 284       aResultArc->attribute(SketchPlugin_Arc::START_ID()));
 285     std::shared_ptr<GeomDataAPI_Point2D> aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 286       aResultArc->attribute(SketchPlugin_Arc::END_ID()));
 287     if(aStartPoint->isInitialized() && aEndPoint->isInitialized() &&
 288       (aStartPoint->pnt()->xy()->distance(aTangentPntA) > tolerance ||
 289        aEndPoint->pnt()->xy()->distance(aTangentPntB) > tolerance)) {
 290       std::dynamic_pointer_cast<SketchPlugin_Arc>(aResultArc)->setReversed(false);
 291     }
 292     aStartPoint->setValue(aTangentPntA->x(), aTangentPntA->y());
 293     aEndPoint->setValue(aTangentPntB->x(), aTangentPntB->y());
 294     aResultArc->data()->blockSendAttributeUpdated(false);
 295     aResultArc->execute();
 296
 297     if(anIsNeedNewObjects) {
 298       // Create list of additional constraints:
 299       // 1. Coincidence of boundary points of features (copied lines/arcs) and fillet arc
 300       // 1.1. coincidence
 301       FeaturePtr aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 302       AttributeRefAttrPtr aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 303           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 304       aRefAttr->setAttr(aResultArc->attribute(SketchPlugin_Arc::START_ID()));
 305       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 306           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 307       int aFeatInd = isReversed ? 1 : 0;
 308       int anAttrInd = (isReversed ? 2 : 0) + (isStart[isReversed ? 1 : 0] ? 0 : 1);
 309       aRefAttr->setAttr(aResultFeatures[aFeatInd]->attribute(aFeatAttributes[anAttrInd]));
 310       recalculateAttributes(aResultArc, SketchPlugin_Arc::START_ID(), aResultFeatures[aFeatInd], aFeatAttributes[anAttrInd]);
 311       aConstraint->execute();
 312       aFilletFeatures.resultConstraints.push_back(aConstraint);
 313       ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 314       // 1.2. coincidence
 315       aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 316       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 317           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 318       aRefAttr->setAttr(aResultArc->attribute(SketchPlugin_Arc::END_ID()));
 319       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 320           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 321       aFeatInd = isReversed ? 0 : 1;
 322       anAttrInd = (isReversed ? 0 : 2) + (isStart[isReversed ? 0 : 1] ? 0 : 1);
 323       aRefAttr->setAttr(aResultFeatures[aFeatInd]->attribute(aFeatAttributes[anAttrInd]));
 324       recalculateAttributes(aResultArc, SketchPlugin_Arc::END_ID(), aResultFeatures[aFeatInd], aFeatAttributes[anAttrInd]);
 325       aConstraint->execute();
 326       aFilletFeatures.resultConstraints.push_back(aConstraint);
 327       ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 328       // 2. Fillet arc radius
 329       //aConstraint = sketch()->addFeature(SketchPlugin_ConstraintRadius::ID());
 330       //aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 331       //    aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 332       //aRefAttr->setObject(aNewArc->lastResult());
 333       //std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 334       //    aConstraint->attribute(SketchPlugin_Constraint::VALUE()))->setValue(aFilletRadius);
 335       //std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 336       //    aConstraint->attribute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT()))->setValue(
 337       //    isStart[0] ? aStartEndPnt[0] : aStartEndPnt[1]);
 338       //aConstraint->execute();
 339       //myProducedFeatures.push_back(aConstraint);
 340       //ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 341       // 3. Tangency of fillet arc and features
 342       for (int i = 0; i < aNbFeatures; i++) {
 343         aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 344         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 345             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 346         aRefAttr->setObject(aResultArc->lastResult());
 347         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 348             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 349         bool isArc = aResultFeatures[i]->getKind() == SketchPlugin_Arc::ID();
 350         aRefAttr->setObject(isArc ? aResultFeatures[i]->lastResult() : aResultFeatures[i]->firstResult());
 351         aConstraint->execute();
 352         aFilletFeatures.resultConstraints.push_back(aConstraint);
 353         ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 354       }
 355       // 4. Coincidence of free boundaries of base and copied features
 356       for (int i = 0; i < aNbFeatures; i++) {
 357         anAttrInd = 2*i + (isStart[i] ? 1 : 0);
 358         aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 359         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 360             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 361         aRefAttr->setAttr(aBaseFeatures[i]->attribute(aFeatAttributes[anAttrInd]));
 362         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 363             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 364         aRefAttr->setAttr(aResultFeatures[i]->attribute(aFeatAttributes[anAttrInd]));
 365         aFilletFeatures.resultConstraints.push_back(aConstraint);
 366       }
 367       // 4.1. Additional tangency constraints when the fillet is based on arcs.
 368       //      It is used to verify the created arc will be placed on a source.
 369       for (int i = 0; i < aNbFeatures; ++i) {
 370         if (aResultFeatures[i]->getKind() != SketchPlugin_Arc::ID())
 371           continue;
 372         aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 373         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 374             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 375         aRefAttr->setObject(aBaseFeatures[i]->lastResult());
 376         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 377             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 378         aRefAttr->setObject(aResultFeatures[i]->lastResult());
 379         aConstraint->execute();
 380         aFilletFeatures.resultConstraints.push_back(aConstraint);
 381         ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 382       }
 383       // 5. Tangent points should be placed on the base features
 384       for (int i = 0; i < aNbFeatures; i++) {
 385         anAttrInd = 2*i + (isStart[i] ? 0 : 1);
 386         aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 387         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 388             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 389         aRefAttr->setAttr(aResultFeatures[i]->attribute(aFeatAttributes[anAttrInd]));
 390         aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 391             aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 392         aRefAttr->setObject(aBaseFeatures[i]->lastResult());
 393         aFilletFeatures.resultConstraints.push_back(aConstraint);
 394       }
 395       // make base features auxiliary
 396       aBaseEdgeA->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(true);
 397       aBaseEdgeB->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(true);
 398
 399       // exchange the naming IDs of newly created and old line that become auxiliary
 400       sketch()->exchangeIDs(aBaseEdgeA, aResultEdgeA);
 401       sketch()->exchangeIDs(aBaseEdgeB, aResultEdgeB);
 402
 403       // store point and features in the map.
 404       myPointFeaturesMap[aPointAttr] = aFilletFeatures;
 405     } else {
 406       // Update radius value
 407       int aNbSubs = sketch()->numberOfSubs();
 408       FeaturePtr aSubFeature;
 409       for (int aSub = 0; aSub < aNbSubs; aSub++) {
 410         aSubFeature = sketch()->subFeature(aSub);
 411         if (aSubFeature->getKind() != SketchPlugin_ConstraintRadius::ID())
 412           continue;
 413         AttributeRefAttrPtr aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 414             aSubFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 415         if (!aRefAttr || !aRefAttr->isObject())
 416           continue;
 417         FeaturePtr aFeature = ModelAPI_Feature::feature(aRefAttr->object());
 418         if (aFeature == aResultArc) {
 419           AttributeDoublePtr aRadius = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 420             aSubFeature->attribute(SketchPlugin_Constraint::VALUE()));
 421           aRadius->setValue(aFilletRadius);
 422           break;
 423         }
 424       }
 425     }
 426   }
 427
 428   // Send events to update the sub-features by the solver.
 429   if(isUpdateFlushed) {
 430     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 431   }
 432 }
 433
 434 void SketchPlugin_ConstraintFillet::attributeChanged(const std::string& theID)
 435 {
 436   if(theID == SketchPlugin_Constraint::ENTITY_A()) {
 437     if(myListOfPointsChangedInCode) {
 438       return;
 439     }
 440
 441     // Clear results.
 442     clearResults();
 443
 444     // Clear list of new points.
 445     myNewPoints.clear();
 446
 447     // Get list of points for fillets and current radius.
 448     AttributeRefAttrListPtr aRefListOfFilletPoints = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttrList>(
 449       data()->attribute(SketchPlugin_Constraint::ENTITY_A()));
 450     AttributeDoublePtr aRadiusAttribute = real(VALUE());
 451     int aListSize = aRefListOfFilletPoints->size();
 452     if(aListSize == 0 && !myRadiusChangedByUser) {
 453       // If list is empty reset radius to zero (if it was not changed by user).
 454       myRadiusChangedInCode = true;
 455       aRadiusAttribute->setValue(0);
 456       myRadiusChangedInCode = false;
 457       return;
 458     }
 459
 460     // Iterate over points to get base lines an calculate radius for fillets.
 461     double aMinimumRadius = 0;
 462     std::list<std::pair<ObjectPtr, AttributePtr>> aSelectedPointsList = aRefListOfFilletPoints->list();
 463     std::list<std::pair<ObjectPtr, AttributePtr>>::iterator anIter = aSelectedPointsList.begin();
 464     std::set<AttributePtr> aPointsToSkeep;
 465     for(int anIndex = 0; anIndex < aListSize; anIndex++, anIter++) {
 466       AttributePtr aFilletPointAttr = (*anIter).second;
 467       std::shared_ptr<GeomDataAPI_Point2D> aFilletPoint2D =
 468         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aFilletPointAttr);
 469       if(!aFilletPoint2D.get()) {
 470         myNewPoints.clear();
 471         setError("Error: One of the selected points is invalid.");
 472         return;
 473       }
 474
 475       // If point or coincident point is already in list remove it from attribute.
 476       if(aPointsToSkeep.find(aFilletPointAttr) != aPointsToSkeep.end()) {
 477         myListOfPointsChangedInCode = true;
 478         aRefListOfFilletPoints->remove(aFilletPointAttr);
 479         myListOfPointsChangedInCode = false;
 480         continue;
 481       }
 482
 483       // Obtain constraint coincidence for the fillet point.
 484       FeaturePtr aConstraintCoincidence;
 485       const std::set<AttributePtr>& aRefsList = aFilletPointAttr->owner()->data()->refsToMe();
 486       for(std::set<AttributePtr>::const_iterator anIt = aRefsList.cbegin(); anIt != aRefsList.cend(); ++anIt) {
 487         std::shared_ptr<ModelAPI_Attribute> anAttr = (*anIt);
 488         FeaturePtr aConstrFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(anAttr->owner());
 489         if(aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 490           AttributeRefAttrPtr anAttrRefA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 491             aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_A()));
 492           AttributeRefAttrPtr anAttrRefB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 493             aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_B()));
 494           if(anAttrRefA.get()) {
 495             AttributePtr anAttrA = anAttrRefA->attr();
 496             if(aFilletPointAttr == anAttrA) {
 497               aConstraintCoincidence = aConstrFeature;
 498               break;
 499             }
 500           }
 501           if(anAttrRefB.get()) {
 502             AttributePtr anAttrB = anAttrRefB->attr();
 503             if(aFilletPointAttr == anAttrB) {
 504               aConstraintCoincidence = aConstrFeature;
 505               break;
 506             }
 507           }
 508         }
 509       }
 510
 511       if(!aConstraintCoincidence.get()) {
 512         myNewPoints.clear();
 513         setError("Error: No coincident edges at one of the selected points.");
 514         return;
 515       }
 516
 517       // Get coincides from constraint.
 518       std::set<FeaturePtr> aCoincides;
 519
 520
 521       SketchPlugin_Tools::findCoincidences(aConstraintCoincidence,
 522                                            SketchPlugin_ConstraintCoincidence::ENTITY_A(),
 523                                            aCoincides);
 524       SketchPlugin_Tools::findCoincidences(aConstraintCoincidence,
 525                                            SketchPlugin_ConstraintCoincidence::ENTITY_B(),
 526                                            aCoincides);
 527
 528       // Remove points from set of coincides. Also get all attributes which is equal to this point to exclude it.
 529       std::shared_ptr<GeomAPI_Pnt2d> aFilletPnt2d = aFilletPoint2D->pnt();
 530       std::set<FeaturePtr> aNewSetOfCoincides;
 531       for(std::set<FeaturePtr>::iterator anIt = aCoincides.begin(); anIt != aCoincides.end(); ++anIt) {
 532         std::string aFeatureKind = (*anIt)->getKind();
 533         if(aFeatureKind == SketchPlugin_Point::ID()) {
 534           AttributePtr anAttr = (*anIt)->attribute(SketchPlugin_Point::COORD_ID());
 535           std::shared_ptr<GeomDataAPI_Point2D> aPoint2D =
 536             std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttr);
 537           if(aPoint2D.get() && aFilletPnt2d->isEqual(aPoint2D->pnt())) {
 538             aPointsToSkeep.insert(anAttr);
 539           }
 540         } else if(aFeatureKind == SketchPlugin_Line::ID()) {
 541           AttributePtr anAttrStart = (*anIt)->attribute(SketchPlugin_Line::START_ID());
 542           std::shared_ptr<GeomDataAPI_Point2D> aPointStart2D =
 543             std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttrStart);
 544           if(aPointStart2D.get() && aFilletPnt2d->isEqual(aPointStart2D->pnt())) {
 545             aPointsToSkeep.insert(anAttrStart);
 546           }
 547           AttributePtr anAttrEnd = (*anIt)->attribute(SketchPlugin_Line::END_ID());
 548           std::shared_ptr<GeomDataAPI_Point2D> aPointEnd2D =
 549             std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttrEnd);
 550           if(aPointEnd2D.get() && aFilletPnt2d->isEqual(aPointEnd2D->pnt())) {
 551             aPointsToSkeep.insert(anAttrEnd);
 552           }
 553           aNewSetOfCoincides.insert(*anIt);
 554         } else if(aFeatureKind == SketchPlugin_Arc::ID() ) {
 555           AttributePtr anAttrStart = (*anIt)->attribute(SketchPlugin_Arc::START_ID());
 556           std::shared_ptr<GeomDataAPI_Point2D> aPointStart2D =
 557             std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttrStart);
 558           if(aPointStart2D.get() && aFilletPnt2d->isEqual(aPointStart2D->pnt())) {
 559             aPointsToSkeep.insert(anAttrStart);
 560           }
 561           AttributePtr anAttrEnd = (*anIt)->attribute(SketchPlugin_Arc::END_ID());
 562           std::shared_ptr<GeomDataAPI_Point2D> aPointEnd2D =
 563             std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttrEnd);
 564           if(aPointEnd2D.get() && aFilletPnt2d->isEqual(aPointEnd2D->pnt())) {
 565             aPointsToSkeep.insert(anAttrEnd);
 566           }
 567           aNewSetOfCoincides.insert(*anIt);
 568         }
 569       }
 570       aCoincides = aNewSetOfCoincides;
 571
 572       // If we still have more than two coincides remove auxilary entities from set of coincides.
 573       if(aCoincides.size() > 2) {
 574         aNewSetOfCoincides.clear();
 575         for(std::set<FeaturePtr>::iterator anIt = aCoincides.begin(); anIt != aCoincides.end(); ++anIt) {
 576           if(!(*anIt)->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value()) {
 577             aNewSetOfCoincides.insert(*anIt);
 578           }
 579         }
 580         aCoincides = aNewSetOfCoincides;
 581       }
 582
 583       if(aCoincides.size() != 2) {
 584         myNewPoints.clear();
 585         setError("Error: One of the selected points does not have two suitable edges for fillet.");
 586         return;
 587       }
 588
 589       // Store base point for fillet.
 590       aPointsToSkeep.insert(aFilletPointAttr);
 591       myNewPoints.insert(aFilletPointAttr);
 592
 593       // Get base lines for fillet.
 594       FeaturePtr anOldFeatureA, anOldFeatureB;
 595       std::set<FeaturePtr>::iterator aLinesIt = aCoincides.begin();
 596       anOldFeatureA = *aLinesIt++;
 597       anOldFeatureB = *aLinesIt;
 598
 599       // Getting radius value if it was not changed by user.
 600       if(!myRadiusChangedByUser) {
 601         // Getting points located at 1/3 of edge length from fillet point.
 602         std::shared_ptr<GeomAPI_Pnt2d> aFilletPnt2d = aFilletPoint2D->pnt();
 603         std::shared_ptr<GeomAPI_Pnt2d> aPntA, aPntB;
 604         getPointOnEdge(anOldFeatureA, aFilletPnt2d, aPntA);
 605         getPointOnEdge(anOldFeatureB, aFilletPnt2d, aPntB);
 606
 607         /// Getting distances.
 608         double aDistanceA = getProjectionDistance(anOldFeatureB, aPntA);
 609         double aDistanceB = getProjectionDistance(anOldFeatureA, aPntB);
 610         double aRadius = aDistanceA < aDistanceB ? aDistanceA / 2.0 : aDistanceB / 2.0;
 611         aMinimumRadius = aMinimumRadius == 0 ? aRadius : aRadius < aMinimumRadius ? aRadius : aMinimumRadius;
 612       }
 613     }
 614
 615     // Set new default radius if it was not changed by user.
 616     if(!myRadiusChangedByUser) {
 617       myRadiusChangedInCode = true;
 618       aRadiusAttribute->setValue(aMinimumRadius);
 619       myRadiusChangedInCode = false;
 620     }
 621
 622   } else if(theID == SketchPlugin_Constraint::VALUE()) {
 623     if(myRadiusInitialized && !myRadiusChangedInCode) {
 624       myRadiusChangedByUser = true;
 625     }
 626     if(!myRadiusInitialized) {
 627       myRadiusInitialized = true;
 628     }
 629   }
 630 }
 631
 632 AISObjectPtr SketchPlugin_ConstraintFillet::getAISObject(AISObjectPtr thePrevious)
 633 {
 634   if (!sketch())
 635     return thePrevious;
 636
 637   AISObjectPtr anAIS = thePrevious;
 638   /// TODO: Equal constraint presentation should be put here
 639   return anAIS;
 640 }
 641
 642 bool SketchPlugin_ConstraintFillet::isMacro() const
 643 {
 644   return true;
 645 }
 646
 647 void SketchPlugin_ConstraintFillet::clearResults()
 648 {
 649   // Clear auxiliary flag on initial objects.
 650   for(std::map<AttributePtr, FilletFeatures>::iterator aPointsIter = myPointFeaturesMap.begin();
 651       aPointsIter != myPointFeaturesMap.end();) {
 652     const FilletFeatures& aFilletFeatures = aPointsIter->second;
 653     std::list<std::pair<FeaturePtr, bool>>::const_iterator aFeatureIt;
 654     for(aFeatureIt = aFilletFeatures.baseEdgesState.cbegin();
 655         aFeatureIt != aFilletFeatures.baseEdgesState.cend();
 656         ++aFeatureIt) {
 657       aFeatureIt->first->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(aFeatureIt->second);
 658     }
 659     ++aPointsIter;
 660   }
 661
 662   // And remove all produced features.
 663   DocumentPtr aDoc = sketch()->document();
 664   for(std::map<AttributePtr, FilletFeatures>::iterator aPointsIter = myPointFeaturesMap.begin();
 665       aPointsIter != myPointFeaturesMap.end();) {
 666     // Remove all produced constraints.
 667     const FilletFeatures& aFilletFeatures = aPointsIter->second;
 668     std::list<FeaturePtr>::const_iterator aFeatureIt;
 669     for(aFeatureIt = aFilletFeatures.resultConstraints.cbegin();
 670         aFeatureIt != aFilletFeatures.resultConstraints.cend();
 671         ++aFeatureIt) {
 672       aDoc->removeFeature(*aFeatureIt);
 673     }
 674
 675     // Remove all result edges.
 676     for(aFeatureIt = aFilletFeatures.resultEdges.cbegin();
 677         aFeatureIt != aFilletFeatures.resultEdges.cend();
 678         ++aFeatureIt) {
 679       aDoc->removeFeature(*aFeatureIt);
 680     }
 681
 682     // Remove point from map.
 683     myPointFeaturesMap.erase(aPointsIter++);
 684   }
 685 };
 686
 687
 688 // =========   Auxiliary functions   =================
 689 void recalculateAttributes(FeaturePtr theNewArc,  const std::string& theNewArcAttribute,
 690                            FeaturePtr theFeature, const std::string& theFeatureAttribute)
 691 {
 692   std::shared_ptr<GeomAPI_Pnt2d> anArcPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 693       theNewArc->attribute(theNewArcAttribute))->pnt();
 694   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 695       theFeature->attribute(theFeatureAttribute))->setValue(anArcPoint->x(), anArcPoint->y());
 696 }
 697
 698 /// \brief Find intersections of lines shifted along normal direction
 699 void possibleFilletCenterLineLine(
 700     std::shared_ptr<GeomAPI_XY> thePointA, std::shared_ptr<GeomAPI_Dir2d> theDirA,
 701     std::shared_ptr<GeomAPI_XY> thePointB, std::shared_ptr<GeomAPI_Dir2d> theDirB,
 702     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 703 {
 704   std::shared_ptr<GeomAPI_Dir2d> aDirAT(new GeomAPI_Dir2d(-theDirA->y(), theDirA->x()));
 705   std::shared_ptr<GeomAPI_Dir2d> aDirBT(new GeomAPI_Dir2d(-theDirB->y(), theDirB->x()));
 706   std::shared_ptr<GeomAPI_XY> aPntA, aPntB;
 707   double aDet = theDirA->cross(theDirB);
 708   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 709     aPntA = thePointA->added(aDirAT->xy()->multiplied(aStepA * theRadius));
 710     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 711       aPntB = thePointB->added(aDirBT->xy()->multiplied(aStepB * theRadius));
 712       double aVX = aDirAT->xy()->dot(aPntA);
 713       double aVY = aDirBT->xy()->dot(aPntB);
 714       std::shared_ptr<GeomAPI_XY> aPoint(new GeomAPI_XY(
 715           (theDirB->x() * aVX - theDirA->x() * aVY) / aDet,
 716           (theDirB->y() * aVX - theDirA->y() * aVY) / aDet));
 717       theCenters.push_back(aPoint);
 718     }
 719   }
 720 }
 721
 722 /// \brief Find intersections of line shifted along normal direction in both sides
 723 ///        and a circle with extended radius
 724 void possibleFilletCenterLineArc(
 725     std::shared_ptr<GeomAPI_XY> theStartLine, std::shared_ptr<GeomAPI_Dir2d> theDirLine,
 726     std::shared_ptr<GeomAPI_XY> theCenterArc, double theRadiusArc,
 727     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 728 {
 729   std::shared_ptr<GeomAPI_Dir2d> aDirT(new GeomAPI_Dir2d(-theDirLine->y(), theDirLine->x()));
 730   std::shared_ptr<GeomAPI_XY> aPnt;
 731   double aDirNorm2 = theDirLine->dot(theDirLine);
 732   double aRad = 0.0;
 733   double aDirX = theDirLine->x();
 734   double aDirX2 = theDirLine->x() * theDirLine->x();
 735   double aDirY2 = theDirLine->y() * theDirLine->y();
 736   double aDirXY = theDirLine->x() * theDirLine->y();
 737   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 738     aPnt = theStartLine->added(aDirT->xy()->multiplied(aStepA * theRadius));
 739     double aCoeff = aDirT->xy()->dot(aPnt->decreased(theCenterArc));
 740     double aCoeff2 = aCoeff * aCoeff;
 741     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 742       aRad = theRadiusArc + aStepB * theRadius;
 743       double aD = aRad * aRad * aDirNorm2 - aCoeff2;
 744       if (aD < 0.0)
 745         continue;
 746       double aDs = sqrt(aD);
 747       double x1 = theCenterArc->x() + (aCoeff * aDirT->x() - aDirT->y() * aDs) / aDirNorm2;
 748       double x2 = theCenterArc->x() + (aCoeff * aDirT->x() + aDirT->y() * aDs) / aDirNorm2;
 749       double y1 = (aDirX2 * aPnt->y() + aDirY2 * theCenterArc->y() -
 750           aDirXY * (aPnt->x() - theCenterArc->x()) - theDirLine->y() * aDs) / aDirNorm2;
 751       double y2 = (aDirX2 * aPnt->y() + aDirY2 * theCenterArc->y() -
 752           aDirXY * (aPnt->x() - theCenterArc->x()) + theDirLine->y() * aDs) / aDirNorm2;
 753
 754       std::shared_ptr<GeomAPI_XY> aPoint1(new GeomAPI_XY(x1, y1));
 755       theCenters.push_back(aPoint1);
 756       std::shared_ptr<GeomAPI_XY> aPoint2(new GeomAPI_XY(x2, y2));
 757       theCenters.push_back(aPoint2);
 758     }
 759   }
 760 }
 761
 762 /// \brief Find intersections of two circles with extended radii
 763 void possibleFilletCenterArcArc(
 764     std::shared_ptr<GeomAPI_XY> theCenterA, double theRadiusA,
 765     std::shared_ptr<GeomAPI_XY> theCenterB, double theRadiusB,
 766     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 767 {
 768   std::shared_ptr<GeomAPI_XY> aCenterDir = theCenterB->decreased(theCenterA);
 769   double aCenterDist2 = aCenterDir->dot(aCenterDir);
 770   double aCenterDist = sqrt(aCenterDist2);
 771
 772   double aRadA, aRadB;
 773   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 774     aRadA = theRadiusA + aStepA * theRadius;
 775     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 776       aRadB = theRadiusB + aStepB * theRadius;
 777       if (aRadA + aRadB < aCenterDist || fabs(aRadA - aRadB) > aCenterDist)
 778         continue; // there is no intersections
 779
 780       double aMedDist = (aRadA * aRadA - aRadB * aRadB + aCenterDist2) / (2.0 * aCenterDist);
 781       double aHeight = sqrt(aRadA * aRadA - aMedDist * aMedDist);
 782
 783       double x1 = theCenterA->x() + (aMedDist * aCenterDir->x() + aCenterDir->y() * aHeight) / aCenterDist;
 784       double y1 = theCenterA->y() + (aMedDist * aCenterDir->y() - aCenterDir->x() * aHeight) / aCenterDist;
 785
 786       double x2 = theCenterA->x() + (aMedDist * aCenterDir->x() - aCenterDir->y() * aHeight) / aCenterDist;
 787       double y2 = theCenterA->y() + (aMedDist * aCenterDir->y() + aCenterDir->x() * aHeight) / aCenterDist;
 788
 789       std::shared_ptr<GeomAPI_XY> aPoint1(new GeomAPI_XY(x1, y1));
 790       theCenters.push_back(aPoint1);
 791       std::shared_ptr<GeomAPI_XY> aPoint2(new GeomAPI_XY(x2, y2));
 792       theCenters.push_back(aPoint2);
 793     }
 794   }
 795 }
 796
 797 void calculateFilletCenter(FeaturePtr theFeatureA, FeaturePtr theFeatureB,
 798                            double theRadius, bool theNotInversed[2],
 799                            std::shared_ptr<GeomAPI_XY>& theCenter,
 800                            std::shared_ptr<GeomAPI_XY>& theTangentA,
 801                            std::shared_ptr<GeomAPI_XY>& theTangentB)
 802 {
 803   static const int aNbFeatures = 2;
 804   FeaturePtr aFeature[aNbFeatures] = {theFeatureA, theFeatureB};
 805   std::shared_ptr<GeomAPI_XY> aStart[aNbFeatures], aEnd[aNbFeatures], aCenter[aNbFeatures];
 806   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, aEndPoint;
 807
 808   for (int i = 0; i < aNbFeatures; i++) {
 809     if (aFeature[i]->getKind() == SketchPlugin_Line::ID()) {
 810       aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 811           aFeature[i]->attribute(SketchPlugin_Line::START_ID()));
 812       aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 813           aFeature[i]->attribute(SketchPlugin_Line::END_ID()));
 814     } else if (aFeature[i]->getKind() == SketchPlugin_Arc::ID()) {
 815       aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 816           aFeature[i]->attribute(SketchPlugin_Arc::START_ID()));
 817       aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 818           aFeature[i]->attribute(SketchPlugin_Arc::END_ID()));
 819       aCenter[i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 820           aFeature[i]->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt()->xy();
 821     } else
 822       return;
 823     aStart[i] = std::shared_ptr<GeomAPI_XY>(theNotInversed[i] ?
 824         new GeomAPI_XY(aStartPoint->x(), aStartPoint->y()) :
 825         new GeomAPI_XY(aEndPoint->x(), aEndPoint->y()));
 826     aEnd[i] = std::shared_ptr<GeomAPI_XY>(theNotInversed[i] ?
 827         new GeomAPI_XY(aEndPoint->x(), aEndPoint->y()) :
 828         new GeomAPI_XY(aStartPoint->x(), aStartPoint->y()));
 829   }
 830
 831   if (theFeatureA->getKind() == SketchPlugin_Line::ID() &&
 832       theFeatureB->getKind() == SketchPlugin_Line::ID()) {
 833     std::shared_ptr<GeomAPI_Dir2d> aDir[2];
 834     std::shared_ptr<GeomAPI_Dir2d> aDirT[2];
 835     for (int i = 0; i < aNbFeatures; i++) {
 836       aDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(aEnd[i]->decreased(aStart[i])));
 837       aDirT[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(-aDir[i]->y(), aDir[i]->x()));
 838     }
 839
 840     // get and filter possible centers
 841     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 842     possibleFilletCenterLineLine(aStart[0], aDir[0], aStart[1], aDir[1], theRadius, aSuspectCenters);
 843     double aDot = 0.0;
 844     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 845     for (; anIt != aSuspectCenters.end(); anIt++) {
 846       aDot = aDirT[0]->xy()->dot(aStart[0]->decreased(*anIt));
 847       theTangentA = (*anIt)->added(aDirT[0]->xy()->multiplied(aDot));
 848       if (theTangentA->decreased(aStart[0])->dot(aDir[0]->xy()) < 0.0)
 849         continue; // incorrect position
 850       aDot = aDirT[1]->xy()->dot(aStart[1]->decreased(*anIt));
 851       theTangentB = (*anIt)->added(aDirT[1]->xy()->multiplied(aDot));
 852       if (theTangentB->decreased(aStart[1])->dot(aDir[1]->xy()) < 0.0)
 853         continue; // incorrect position
 854       // the center is found, stop searching
 855       theCenter = *anIt;
 856       return;
 857     }
 858   } else if ((theFeatureA->getKind() == SketchPlugin_Arc::ID() &&
 859       theFeatureB->getKind() == SketchPlugin_Line::ID()) ||
 860       (theFeatureA->getKind() == SketchPlugin_Line::ID() &&
 861       theFeatureB->getKind() == SketchPlugin_Arc::ID())) {
 862     int aLineInd = theFeatureA->getKind() == SketchPlugin_Line::ID() ? 0 : 1;
 863     double anArcRadius = aStart[1-aLineInd]->distance(aCenter[1-aLineInd]);
 864     std::shared_ptr<GeomAPI_Dir2d> aDirLine = std::shared_ptr<GeomAPI_Dir2d>(
 865         new GeomAPI_Dir2d(aEnd[aLineInd]->decreased(aStart[aLineInd])));
 866     std::shared_ptr<GeomAPI_Dir2d> aDirT = std::shared_ptr<GeomAPI_Dir2d>(
 867         new GeomAPI_Dir2d(-aDirLine->y(), aDirLine->x()));
 868
 869     std::shared_ptr<GeomAPI_Dir2d> aStartArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 870         new GeomAPI_Dir2d(aStart[1-aLineInd]->decreased(aCenter[1-aLineInd])));
 871     std::shared_ptr<GeomAPI_Dir2d> aEndArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 872         new GeomAPI_Dir2d(aEnd[1-aLineInd]->decreased(aCenter[1-aLineInd])));
 873     double anArcAngle = aEndArcDir->angle(aStartArcDir);
 874
 875     // get possible centers and filter them
 876     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 877     possibleFilletCenterLineArc(aStart[aLineInd], aDirLine, aCenter[1-aLineInd], anArcRadius, theRadius, aSuspectCenters);
 878     double aDot = 0.0;
 879     // the line is forward into the arc
 880     double innerArc = aCenter[1-aLineInd]->decreased(aStart[aLineInd])->dot(aDirLine->xy());
 881     std::shared_ptr<GeomAPI_XY> aLineTgPoint, anArcTgPoint;
 882     // The possible centers are ranged by their positions.
 883     // If the point is not satisfy one of criteria, the weight is decreased with penalty.
 884     int aBestWeight = 0;
 885     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 886     for (; anIt != aSuspectCenters.end(); anIt++) {
 887       int aWeight = 2;
 888       aDot = aDirT->xy()->dot(aStart[aLineInd]->decreased(*anIt));
 889       aLineTgPoint = (*anIt)->added(aDirT->xy()->multiplied(aDot));
 890       // Check the point is placed on the correct arc (penalty if false)
 891       if (aCenter[1-aLineInd]->distance(*anIt) * innerArc > anArcRadius * innerArc)
 892         aWeight -= 1;
 893       std::shared_ptr<GeomAPI_Dir2d> aCurDir = std::shared_ptr<GeomAPI_Dir2d>(
 894           new GeomAPI_Dir2d((*anIt)->decreased(aCenter[1-aLineInd])));
 895       double aCurAngle = aCurDir->angle(aStartArcDir);
 896       if (anArcAngle < 0.0) aCurAngle *= -1.0;
 897       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle))
 898         continue;
 899       if (aWeight > aBestWeight)
 900         aBestWeight = aWeight;
 901       else if (aWeight < aBestWeight ||
 902                aStart[aLineInd]->distance(*anIt) >
 903                aStart[aLineInd]->distance(theCenter)) // <-- take closer point
 904         continue;
 905       // the center is found, stop searching
 906       theCenter = *anIt;
 907       anArcTgPoint = aCenter[1-aLineInd]->added(aCurDir->xy()->multiplied(anArcRadius));
 908       if (theFeatureA->getKind() == SketchPlugin_Line::ID()) {
 909         theTangentA = aLineTgPoint;
 910         theTangentB = anArcTgPoint;
 911       } else {
 912         theTangentA = anArcTgPoint;
 913         theTangentB = aLineTgPoint;
 914       }
 915       //return;
 916     }
 917   } else if (theFeatureA->getKind() == SketchPlugin_Arc::ID() &&
 918       theFeatureB->getKind() == SketchPlugin_Arc::ID()) {
 919     double anArcRadius[aNbFeatures];
 920     double anArcAngle[aNbFeatures];
 921     std::shared_ptr<GeomAPI_Dir2d> aStartArcDir[aNbFeatures];
 922     for (int i = 0; i < aNbFeatures; i++) {
 923       anArcRadius[i] = aStart[i]->distance(aCenter[i]);
 924       aStartArcDir[i] = std::shared_ptr<GeomAPI_Dir2d>(
 925           new GeomAPI_Dir2d(aStart[i]->decreased(aCenter[i])));
 926       std::shared_ptr<GeomAPI_Dir2d> aEndArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 927           new GeomAPI_Dir2d(aEnd[i]->decreased(aCenter[i])));
 928       anArcAngle[i] = aEndArcDir->angle(aStartArcDir[i]);
 929     }
 930
 931     // get and filter possible centers
 932     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 933     possibleFilletCenterArcArc(aCenter[0], anArcRadius[0], aCenter[1], anArcRadius[1], theRadius, aSuspectCenters);
 934     double aDot = 0.0;
 935     std::shared_ptr<GeomAPI_XY> aLineTgPoint, anArcTgPoint;
 936     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 937     for (; anIt != aSuspectCenters.end(); anIt++) {
 938       std::shared_ptr<GeomAPI_Dir2d> aCurDir = std::shared_ptr<GeomAPI_Dir2d>(
 939           new GeomAPI_Dir2d((*anIt)->decreased(aCenter[0])));
 940       double aCurAngle = aCurDir->angle(aStartArcDir[0]);
 941       if (anArcAngle[0] < 0.0) aCurAngle *= -1.0;
 942       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle[0]))
 943         continue; // incorrect position
 944       theTangentA = aCenter[0]->added(aCurDir->xy()->multiplied(anArcRadius[0]));
 945
 946       aCurDir = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d((*anIt)->decreased(aCenter[1])));
 947       aCurAngle = aCurDir->angle(aStartArcDir[1]);
 948       if (anArcAngle[1] < 0.0) aCurAngle *= -1.0;
 949       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle[1]))
 950         continue; // incorrect position
 951       theTangentB = aCenter[1]->added(aCurDir->xy()->multiplied(anArcRadius[1]));
 952
 953       // the center is found, stop searching
 954       theCenter = *anIt;
 955       return;
 956     }
 957   }
 958 }
 959
 960 void getPointOnEdge(const FeaturePtr theFeature,
 961                     const std::shared_ptr<GeomAPI_Pnt2d> theFilletPoint,
 962                     std::shared_ptr<GeomAPI_Pnt2d>& thePoint) {
 963   if(theFeature->getKind() == SketchPlugin_Line::ID()) {
 964     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 965       theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
 966     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 967       theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
 968     if(aPntStart->distance(theFilletPoint) > 1.e-7) {
 969       aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 970         theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
 971       aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 972         theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
 973     }
 974     thePoint.reset( new GeomAPI_Pnt2d(aPntStart->xy()->added( aPntEnd->xy()->decreased( aPntStart->xy() )->multiplied(1.0 / 3.0) ) ) );
 975   } else {
 976     std::shared_ptr<GeomAPI_Pnt2d> aPntTemp;
 977     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 978       theFeature->attribute(SketchPlugin_Arc::START_ID()))->pnt();
 979     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 980       theFeature->attribute(SketchPlugin_Arc::END_ID()))->pnt();
 981     if(theFeature->attribute(SketchPlugin_Arc::INVERSED_ID())) {
 982       aPntTemp = aPntStart;
 983       aPntStart = aPntEnd;
 984       aPntEnd = aPntTemp;
 985     }
 986     std::shared_ptr<GeomAPI_Pnt2d> aCenterPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 987       theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
 988     std::shared_ptr<GeomAPI_Circ2d> aCirc(new GeomAPI_Circ2d(aCenterPnt, aPntStart));
 989     double aStartParameter(0), anEndParameter(0);
 990     aCirc->parameter(aPntStart, paramTolerance, aStartParameter);
 991     aCirc->parameter(aPntEnd, paramTolerance, anEndParameter);
 992     if(aPntStart->distance(theFilletPoint) > tolerance) {
 993       double aTmpParameter = aStartParameter;
 994       aStartParameter = anEndParameter;
 995       anEndParameter = aTmpParameter;
 996     }
 997     double aPntParameter = aStartParameter + (anEndParameter - aStartParameter) / 3.0;
 998     aCirc->D0(aPntParameter, thePoint);
 999   }
1000 }
1001
1002 double getProjectionDistance(const FeaturePtr theFeature,
1003                              const std::shared_ptr<GeomAPI_Pnt2d> thePoint)
1004 {
1005   std::shared_ptr<GeomAPI_Pnt2d> aProjectPnt;
1006   if(theFeature->getKind() == SketchPlugin_Line::ID()) {
1007     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
1008       theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
1009     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
1010       theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
1011     std::shared_ptr<GeomAPI_Lin2d> aLin(new GeomAPI_Lin2d(aPntStart, aPntEnd));
1012     aProjectPnt = aLin->project(thePoint);
1013   } else {
1014     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
1015       theFeature->attribute(SketchPlugin_Arc::START_ID()))->pnt();
1016     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
1017       theFeature->attribute(SketchPlugin_Arc::END_ID()))->pnt();
1018     std::shared_ptr<GeomAPI_Pnt2d> aCenterPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
1019       theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
1020     std::shared_ptr<GeomAPI_Circ2d> aCirc(new GeomAPI_Circ2d(aCenterPnt, aPntStart));
1021     aProjectPnt = aCirc->project(thePoint);
1022   }
1023   if(aProjectPnt.get()) {
1024     return aProjectPnt->distance(thePoint);
1025   }
1026   return -1;
1027 }
1028
1029 std::set<FeaturePtr> getCoincides(const FeaturePtr& theConstraintCoincidence)
1030 {
1031   std::set<FeaturePtr> aCoincides;
1032
1033   SketchPlugin_Tools::findCoincidences(theConstraintCoincidence,
1034                                        SketchPlugin_ConstraintCoincidence::ENTITY_A(),
1035                                        aCoincides);
1036   SketchPlugin_Tools::findCoincidences(theConstraintCoincidence,
1037                                        SketchPlugin_ConstraintCoincidence::ENTITY_B(),
1038                                        aCoincides);
1039
1040   // Remove points from set of coincides.
1041   std::set<FeaturePtr> aNewSetOfCoincides;
1042   for(std::set<FeaturePtr>::iterator anIt = aCoincides.begin(); anIt != aCoincides.end(); ++anIt) {
1043     if((*anIt)->getKind() == SketchPlugin_Line::ID() ||
1044         (*anIt)->getKind() == SketchPlugin_Arc::ID() ) {
1045       aNewSetOfCoincides.insert(*anIt);
1046     }
1047   }
1048   aCoincides = aNewSetOfCoincides;
1049
1050   // If we still have more than two coincides remove auxilary entities from set of coincides.
1051   if(aCoincides.size() > 2) {
1052     aNewSetOfCoincides.clear();
1053     for(std::set<FeaturePtr>::iterator anIt = aCoincides.begin(); anIt != aCoincides.end(); ++anIt) {
1054       if(!(*anIt)->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value()) {
1055         aNewSetOfCoincides.insert(*anIt);
1056       }
1057     }
1058     aCoincides = aNewSetOfCoincides;
1059   }
1060
1061   return aCoincides;
1062 }