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_AttributeRefAttr.h>
  17 #include <ModelAPI_AttributeRefList.h>
  18 #include <ModelAPI_Data.h>
  19 #include <ModelAPI_Events.h>
  20 #include <ModelAPI_ResultConstruction.h>
  21 #include <ModelAPI_Session.h>
  22 #include <ModelAPI_Validator.h>
  23
  24 #include <SketchPlugin_Arc.h>
  25 #include <SketchPlugin_Line.h>
  26 #include <SketchPlugin_Sketch.h>
  27 #include <SketchPlugin_ConstraintCoincidence.h>
  28 #include <SketchPlugin_ConstraintTangent.h>
  29 #include <SketchPlugin_ConstraintRadius.h>
  30 #include <SketchPlugin_Point.h>
  31 #include <SketchPlugin_Tools.h>
  32
  33 #include <SketcherPrs_Factory.h>
  34 #include <SketcherPrs_Tools.h>
  35
  36 #include <Config_PropManager.h>
  37 #include <Events_Loop.h>
  38
  39 #define _USE_MATH_DEFINES
  40 #include <math.h>
  41
  42 static const std::string PREVIOUS_VALUE("FilletPreviousRadius");
  43
  44 const double tolerance = 1.e-7;
  45 const double paramTolerance = 1.e-4;
  46
  47 /// \brief Attract specified point on theNewArc to the attribute of theFeature
  48 static void recalculateAttributes(FeaturePtr theNewArc, const std::string& theNewArcAttribute,
  49   FeaturePtr theFeature, const std::string& theFeatureAttribute);
  50
  51 /// \brief Calculates center of fillet arc and coordinates of tangency points
  52 static void calculateFilletCenter(FeaturePtr theFeatureA, FeaturePtr theFeatureB,
  53                                   double theRadius, bool theNotInversed[2],
  54                                   std::shared_ptr<GeomAPI_XY>& theCenter,
  55                                   std::shared_ptr<GeomAPI_XY>& theTangentA,
  56                                   std::shared_ptr<GeomAPI_XY>& theTangentB);
  57
  58 /// Get point on 1/3 length of edge from fillet point
  59 static void getPointOnEdge(const FeaturePtr theFeature,
  60                            const std::shared_ptr<GeomAPI_Pnt2d> theFilletPoint,
  61                            std::shared_ptr<GeomAPI_Pnt2d>& thePoint);
  62
  63 /// Get distance from point to feature
  64 static double getProjectionDistance(const FeaturePtr theFeature,
  65                              const std::shared_ptr<GeomAPI_Pnt2d> thePoint);
  66
  67 SketchPlugin_ConstraintFillet::SketchPlugin_ConstraintFillet()
  68 {
  69 }
  70
  71 void SketchPlugin_ConstraintFillet::initAttributes()
  72 {
  73   data()->addAttribute(SketchPlugin_Constraint::VALUE(), ModelAPI_AttributeDouble::typeId());
  74   data()->addAttribute(SketchPlugin_Constraint::ENTITY_A(), ModelAPI_AttributeRefAttr::typeId());
  75   data()->addAttribute(SketchPlugin_Constraint::ENTITY_B(), ModelAPI_AttributeRefList::typeId());
  76   // This attribute used to store base edges
  77   data()->addAttribute(SketchPlugin_Constraint::ENTITY_C(), ModelAPI_AttributeRefList::typeId());
  78   data()->addAttribute(PREVIOUS_VALUE, ModelAPI_AttributeDouble::typeId());
  79   // initialize attribute not applicable for user
  80   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_B());
  81   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), SketchPlugin_Constraint::ENTITY_C());
  82   data()->attribute(PREVIOUS_VALUE)->setInitialized();
  83   std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(data()->attribute(PREVIOUS_VALUE))->setValue(0.0);
  84 }
  85
  86 void SketchPlugin_ConstraintFillet::execute()
  87 {
  88   static const double aTol = 1.e-7;
  89
  90   // the viewer update should be blocked in order to avoid the temporaty fillet sub-features visualization
  91   // before they are processed by the solver
  92   //std::shared_ptr<Events_Message> aMsg = std::shared_ptr<Events_Message>(
  93   //    new Events_Message(Events_Loop::eventByName(EVENT_UPDATE_VIEWER_BLOCKED)));
  94   //Events_Loop::loop()->send(aMsg);
  95
  96   std::shared_ptr<ModelAPI_Data> aData = data();
  97   ResultConstructionPtr aRC;
  98   // Check the base objects are initialized
  99   double aFilletRadius = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 100       aData->attribute(SketchPlugin_Constraint::VALUE()))->value();
 101   AttributeRefAttrPtr aBaseA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 102       aData->attribute(SketchPlugin_Constraint::ENTITY_A()));
 103   if (!aBaseA->isInitialized() || aBaseA->isObject()) {
 104     setError("Bad vertex selected");
 105     return;
 106   }
 107
 108   // Obtain fillet point
 109   std::shared_ptr<GeomDataAPI_Point2D> aBasePoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aBaseA->attr());
 110   if (!aBasePoint) {
 111     setError("Bad vertex selected");
 112     return;
 113   }
 114   std::shared_ptr<GeomAPI_Pnt2d> aFilletPoint = aBasePoint->pnt();
 115
 116   // Check the fillet shapes is not initialized yet
 117   AttributeRefListPtr aRefListOfFillet = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>(
 118       aData->attribute(SketchPlugin_Constraint::ENTITY_B()));
 119   bool needNewObjects = aRefListOfFillet->size() == 0;
 120
 121   AttributeRefListPtr aRefListOfBaseLines = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>(
 122       aData->attribute(SketchPlugin_Constraint::ENTITY_C()));
 123
 124   // Obtain base features
 125   FeaturePtr anOldFeatureA, anOldFeatureB;
 126   std::list<ObjectPtr> anOldFeatList = aRefListOfBaseLines->list();
 127   std::list<ObjectPtr>::iterator aFeatIt = anOldFeatList.begin();
 128   anOldFeatureA = ModelAPI_Feature::feature(*aFeatIt++);
 129   anOldFeatureB = ModelAPI_Feature::feature(*aFeatIt);
 130
 131   if(!anOldFeatureA.get() || !anOldFeatureB.get()) {
 132     setError("One of the edges is empty");
 133     return;
 134   }
 135
 136   FeaturePtr aNewFeatureA, aNewFeatureB, aNewArc;
 137   if (needNewObjects) {
 138     // Create list of objects composing a fillet
 139     // copy aFeatureA
 140     aNewFeatureA = SketchPlugin_Sketch::addUniqueNamedCopiedFeature(anOldFeatureA, sketch());
 141     // copy aFeatureB
 142     aNewFeatureB = SketchPlugin_Sketch::addUniqueNamedCopiedFeature(anOldFeatureB, sketch());
 143     // create filleting arc (it will be attached to the list later)
 144     aNewArc = sketch()->addFeature(SketchPlugin_Arc::ID());
 145   } else {
 146     // Obtain features from the list
 147     std::list<ObjectPtr> aNewFeatList = aRefListOfFillet->list();
 148     std::list<ObjectPtr>::iterator aFeatIt = aNewFeatList.begin();
 149     aNewFeatureA = ModelAPI_Feature::feature(*aFeatIt++);
 150     aNewFeatureB = ModelAPI_Feature::feature(*aFeatIt++);
 151     aNewArc = ModelAPI_Feature::feature(*aFeatIt);
 152   }
 153
 154   // Calculate arc attributes
 155   static const int aNbFeatures = 2;
 156   FeaturePtr aFeature[aNbFeatures] = {anOldFeatureA, anOldFeatureB};
 157   FeaturePtr aNewFeature[aNbFeatures] = {aNewFeatureA, aNewFeatureB};
 158   std::shared_ptr<GeomAPI_Dir2d> aTangentDir[aNbFeatures]; // tangent directions of the features in coincident point
 159   bool isStart[aNbFeatures]; // indicates which point the features share
 160   std::shared_ptr<GeomAPI_Pnt2d> aStartEndPnt[aNbFeatures * 2]; // first pair of points relate to first feature, second pair -  to second
 161   std::string aFeatAttributes[aNbFeatures * 2]; // attributes of features
 162   for (int i = 0; i < aNbFeatures; i++) {
 163     std::string aStartAttr, aEndAttr;
 164     if (aNewFeature[i]->getKind() == SketchPlugin_Line::ID()) {
 165       aStartAttr = SketchPlugin_Line::START_ID();
 166       aEndAttr = SketchPlugin_Line::END_ID();
 167     } else if (aNewFeature[i]->getKind() == SketchPlugin_Arc::ID()) {
 168       aStartAttr = SketchPlugin_Arc::START_ID();
 169       aEndAttr = SketchPlugin_Arc::END_ID();
 170     } else { // wrong argument
 171       aRefListOfFillet->remove(aNewFeatureA);
 172       aRefListOfFillet->remove(aNewFeatureB);
 173       aRefListOfFillet->remove(aNewArc);
 174       aRefListOfBaseLines->clear();
 175       return;
 176     }
 177     aFeatAttributes[2*i] = aStartAttr;
 178     aStartEndPnt[2*i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 179         aFeature[i]->attribute(aStartAttr))->pnt();
 180     aFeatAttributes[2*i+1] = aEndAttr;
 181     aStartEndPnt[2*i+1] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 182         aFeature[i]->attribute(aEndAttr))->pnt();
 183   }
 184   for (int aFeatInd = 0; aFeatInd < aNbFeatures; aFeatInd++) {
 185     for (int j = 0; j < 2; j++) // loop on start-end of each feature
 186       if (aStartEndPnt[aFeatInd * aNbFeatures + j]->distance(aFilletPoint) < 1.e-10) {
 187         isStart[aFeatInd] = (j==0);
 188         break;
 189       }
 190   }
 191   // tangent directions of the features
 192   for (int i = 0; i < aNbFeatures; i++) {
 193     std::shared_ptr<GeomAPI_XY> aDir;
 194     if (aNewFeature[i]->getKind() == SketchPlugin_Line::ID()) {
 195       aDir = aStartEndPnt[2*i+1]->xy()->decreased(aStartEndPnt[2*i]->xy());
 196       if (!isStart[i])
 197         aDir = aDir->multiplied(-1.0);
 198     } else if (aNewFeature[i]->getKind() == SketchPlugin_Arc::ID()) {
 199       std::shared_ptr<GeomAPI_Pnt2d> aCenterPoint =
 200           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 201           aNewFeature[i]->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
 202       aDir = isStart[i] ? aStartEndPnt[2*i]->xy() : aStartEndPnt[2*i+1]->xy();
 203       aDir = aDir->decreased(aCenterPoint->xy());
 204
 205       double x = aDir->x();
 206       double y = aDir->y();
 207       aDir->setX(-y);
 208       aDir->setY(x);
 209       if (isStart[i] == std::dynamic_pointer_cast<SketchPlugin_Arc>(aFeature[i])->isReversed())
 210         aDir = aDir->multiplied(-1.0);
 211     }
 212     aTangentDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(aDir));
 213   }
 214
 215   // Wait all constraints being created, then send update events
 216   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 217   bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
 218   if (isUpdateFlushed)
 219     Events_Loop::loop()->setFlushed(anUpdateEvent, false);
 220
 221   // By default, the start point of fillet arc is connected to FeatureA,
 222   // and the end point - to FeatureB. But when the angle between TangentDirA and
 223   // TangentDirB greater 180 degree, the sequaence of features need to be reversed.
 224   double cosBA = aTangentDir[0]->cross(aTangentDir[1]); // cos(B-A), where A and B - angles between corresponding tanget direction and the X axis
 225   bool isReversed = cosBA > 0.0;
 226
 227   // Calculate fillet arc parameters
 228   std::shared_ptr<GeomAPI_XY> aCenter, aTangentPntA, aTangentPntB;
 229   calculateFilletCenter(anOldFeatureA, anOldFeatureB, aFilletRadius, isStart, aCenter, aTangentPntA, aTangentPntB);
 230   if(!aCenter.get() || !aTangentPntA.get() || !aTangentPntB.get()) {
 231     setError("Can not create fillet with the specified parameters.");
 232     return;
 233   }
 234   // update features
 235   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 236       aNewFeatureA->attribute(aFeatAttributes[isStart[0] ? 0 : 1]))->setValue(
 237       aTangentPntA->x(), aTangentPntA->y());
 238   aNewFeatureA->execute();
 239   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 240       aNewFeatureB->attribute(aFeatAttributes[2 + (isStart[1] ? 0 : 1)]))->setValue(
 241       aTangentPntB->x(), aTangentPntB->y());
 242   aNewFeatureB->execute();
 243   // update fillet arc: make the arc correct for sure, so, it is not needed to process the "attribute updated"
 244   // by arc; moreover, it may cause cyclicity in hte mechanism of updater
 245   aNewArc->data()->blockSendAttributeUpdated(true);
 246   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 247       aNewArc->attribute(SketchPlugin_Arc::CENTER_ID()))->setValue(
 248       aCenter->x(), aCenter->y());
 249   if (isReversed) {
 250     std::shared_ptr<GeomAPI_XY> aTmp = aTangentPntA;
 251     aTangentPntA = aTangentPntB;
 252     aTangentPntB = aTmp;
 253   }
 254   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 255       aNewArc->attribute(SketchPlugin_Arc::START_ID()));
 256   std::shared_ptr<GeomDataAPI_Point2D> aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 257       aNewArc->attribute(SketchPlugin_Arc::END_ID()));
 258   if (aStartPoint->isInitialized() && aEndPoint->isInitialized() &&
 259      (aStartPoint->pnt()->xy()->distance(aTangentPntA) > aTol ||
 260       aEndPoint->pnt()->xy()->distance(aTangentPntB) > aTol))
 261     std::dynamic_pointer_cast<SketchPlugin_Arc>(aNewArc)->setReversed(false);
 262   aStartPoint->setValue(aTangentPntA->x(), aTangentPntA->y());
 263   aEndPoint->setValue(aTangentPntB->x(), aTangentPntB->y());
 264   aNewArc->data()->blockSendAttributeUpdated(false);
 265   aNewArc->execute();
 266
 267   if (needNewObjects) {
 268     // attach new arc to the list
 269     aRefListOfFillet->append(aNewFeatureA->lastResult());
 270     aRefListOfFillet->append(aNewFeatureB->lastResult());
 271     aRefListOfFillet->append(aNewArc->lastResult());
 272
 273     myProducedFeatures.push_back(aNewFeatureA);
 274     myProducedFeatures.push_back(aNewFeatureB);
 275     myProducedFeatures.push_back(aNewArc);
 276
 277     // Create list of additional constraints:
 278     // 1. Coincidence of boundary points of features (copied lines/arcs) and fillet arc
 279     // 1.1. coincidence
 280     FeaturePtr aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 281     AttributeRefAttrPtr aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 282         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 283     aRefAttr->setAttr(aNewArc->attribute(SketchPlugin_Arc::START_ID()));
 284     aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 285         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 286     int aFeatInd = isReversed ? 1 : 0;
 287     int anAttrInd = (isReversed ? 2 : 0) + (isStart[isReversed ? 1 : 0] ? 0 : 1);
 288     aRefAttr->setAttr(aNewFeature[aFeatInd]->attribute(aFeatAttributes[anAttrInd]));
 289     recalculateAttributes(aNewArc, SketchPlugin_Arc::START_ID(), aNewFeature[aFeatInd], aFeatAttributes[anAttrInd]);
 290     aConstraint->execute();
 291     myProducedFeatures.push_back(aConstraint);
 292     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 293     // 1.2. coincidence
 294     aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 295     aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 296         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 297     aRefAttr->setAttr(aNewArc->attribute(SketchPlugin_Arc::END_ID()));
 298     aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 299         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 300     aFeatInd = isReversed ? 0 : 1;
 301     anAttrInd = (isReversed ? 0 : 2) + (isStart[isReversed ? 0 : 1] ? 0 : 1);
 302     aRefAttr->setAttr(aNewFeature[aFeatInd]->attribute(aFeatAttributes[anAttrInd]));
 303     recalculateAttributes(aNewArc, SketchPlugin_Arc::END_ID(), aNewFeature[aFeatInd], aFeatAttributes[anAttrInd]);
 304     aConstraint->execute();
 305     myProducedFeatures.push_back(aConstraint);
 306     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 307     // 2. Fillet arc radius
 308     //aConstraint = sketch()->addFeature(SketchPlugin_ConstraintRadius::ID());
 309     //aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 310     //    aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 311     //aRefAttr->setObject(aNewArc->lastResult());
 312     //std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 313     //    aConstraint->attribute(SketchPlugin_Constraint::VALUE()))->setValue(aFilletRadius);
 314     //std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 315     //    aConstraint->attribute(SketchPlugin_Constraint::FLYOUT_VALUE_PNT()))->setValue(
 316     //    isStart[0] ? aStartEndPnt[0] : aStartEndPnt[1]);
 317     //aConstraint->execute();
 318     //myProducedFeatures.push_back(aConstraint);
 319     //ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 320     // 3. Tangency of fillet arc and features
 321     for (int i = 0; i < aNbFeatures; i++) {
 322       aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 323       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 324           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 325       aRefAttr->setObject(aNewArc->lastResult());
 326       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 327           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 328       bool isArc = aNewFeature[i]->getKind() == SketchPlugin_Arc::ID();
 329       aRefAttr->setObject(isArc ? aNewFeature[i]->lastResult() : aNewFeature[i]->firstResult());
 330       aConstraint->execute();
 331       myProducedFeatures.push_back(aConstraint);
 332       ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 333     }
 334     // 4. Coincidence of free boundaries of base and copied features
 335     for (int i = 0; i < aNbFeatures; i++) {
 336       anAttrInd = 2*i + (isStart[i] ? 1 : 0);
 337       aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 338       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 339           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 340       aRefAttr->setAttr(aFeature[i]->attribute(aFeatAttributes[anAttrInd]));
 341       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 342           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 343       aRefAttr->setAttr(aNewFeature[i]->attribute(aFeatAttributes[anAttrInd]));
 344       myProducedFeatures.push_back(aConstraint);
 345     }
 346     // 4.1. Additional tangency constraints when the fillet is based on arcs.
 347     //      It is used to verify the created arc will be placed on a source.
 348     for (int i = 0; i < aNbFeatures; ++i) {
 349       if (aNewFeature[i]->getKind() != SketchPlugin_Arc::ID())
 350         continue;
 351       aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 352       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 353           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 354       aRefAttr->setObject(aFeature[i]->lastResult());
 355       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 356           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 357       aRefAttr->setObject(aNewFeature[i]->lastResult());
 358       aConstraint->execute();
 359       myProducedFeatures.push_back(aConstraint);
 360       ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 361     }
 362     // 5. Tangent points should be placed on the base features
 363     for (int i = 0; i < aNbFeatures; i++) {
 364       anAttrInd = 2*i + (isStart[i] ? 0 : 1);
 365       aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 366       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 367           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 368       aRefAttr->setAttr(aNewFeature[i]->attribute(aFeatAttributes[anAttrInd]));
 369       aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 370           aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 371       aRefAttr->setObject(aFeature[i]->lastResult());
 372       myProducedFeatures.push_back(aConstraint);
 373     }
 374     // make base features auxiliary
 375     anOldFeatureA->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(true);
 376     anOldFeatureB->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(true);
 377     myBaseObjects.clear();
 378     myBaseObjects.push_back(anOldFeatureA);
 379     myBaseObjects.push_back(anOldFeatureB);
 380     // exchange the naming IDs of newly created and old line that become auxiliary
 381     sketch()->exchangeIDs(anOldFeatureA, aNewFeatureA);
 382     sketch()->exchangeIDs(anOldFeatureB, aNewFeatureB);
 383   } else {
 384     // Update radius value
 385     int aNbSubs = sketch()->numberOfSubs();
 386     FeaturePtr aSubFeature;
 387     for (int aSub = 0; aSub < aNbSubs; aSub++) {
 388       aSubFeature = sketch()->subFeature(aSub);
 389       if (aSubFeature->getKind() != SketchPlugin_ConstraintRadius::ID())
 390         continue;
 391       AttributeRefAttrPtr aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 392           aSubFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 393       if (!aRefAttr || !aRefAttr->isObject())
 394         continue;
 395       FeaturePtr aFeature = ModelAPI_Feature::feature(aRefAttr->object());
 396       if (aFeature == aNewArc) {
 397         AttributeDoublePtr aRadius = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 398           aSubFeature->attribute(SketchPlugin_Constraint::VALUE()));
 399         aRadius->setValue(aFilletRadius);
 400         break;
 401       }
 402     }
 403   }
 404
 405   // send events to update the sub-features by the solver
 406   if (isUpdateFlushed)
 407     Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 408
 409   // the viewer update should be unblocked in order after the fillet features
 410   // are processed by the solver
 411   //aMsg = std::shared_ptr<Events_Message>(
 412   //              new Events_Message(Events_Loop::eventByName(EVENT_UPDATE_VIEWER_UNBLOCKED)));
 413   //Events_Loop::loop()->send(aMsg);
 414 }
 415
 416 void SketchPlugin_ConstraintFillet::attributeChanged(const std::string& theID)
 417 {
 418   if (theID == SketchPlugin_Constraint::ENTITY_A()) {
 419     // clear the list of fillet entities
 420     AttributeRefListPtr aRefListOfFillet = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>(
 421         data()->attribute(SketchPlugin_Constraint::ENTITY_B()));
 422     aRefListOfFillet->clear();
 423
 424     // clear the list of base features
 425     AttributeRefListPtr aRefListOfBaseLines = std::dynamic_pointer_cast<ModelAPI_AttributeRefList>(
 426         data()->attribute(SketchPlugin_Constraint::ENTITY_C()));
 427       aRefListOfBaseLines->clear();
 428
 429     // remove all produced objects and constraints
 430     DocumentPtr aDoc = sketch()->document();
 431     std::list<FeaturePtr>::iterator aCIt = myProducedFeatures.begin();
 432     for (; aCIt != myProducedFeatures.end(); ++aCIt)
 433       aDoc->removeFeature(*aCIt);
 434     myProducedFeatures.clear();
 435
 436     // clear auxiliary flag on initial objects
 437     for (aCIt = myBaseObjects.begin(); aCIt != myBaseObjects.end(); ++aCIt)
 438       (*aCIt)->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->setValue(false);
 439     myBaseObjects.clear();
 440
 441     // Obtain fillet point
 442     AttributeRefAttrPtr aBaseA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 443         data()->attribute(SketchPlugin_Constraint::ENTITY_A()));
 444     if(!aBaseA->isInitialized() || aBaseA->isObject()) {
 445       return;
 446     }
 447     AttributePtr anAttrBaseA = aBaseA->attr();
 448     std::shared_ptr<GeomDataAPI_Point2D> aBasePoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anAttrBaseA);
 449     if (!aBasePoint) {
 450       return;
 451     }
 452     std::shared_ptr<GeomAPI_Pnt2d> aFilletPoint = aBasePoint->pnt();
 453
 454     // Obtain conicident edges
 455     const std::set<AttributePtr>& aRefsList = anAttrBaseA->owner()->data()->refsToMe();
 456     std::set<AttributePtr>::const_iterator aIt;
 457     FeaturePtr aCoincident;
 458     for (aIt = aRefsList.cbegin(); aIt != aRefsList.cend(); ++aIt) {
 459       std::shared_ptr<ModelAPI_Attribute> aAttr = (*aIt);
 460       FeaturePtr aConstrFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(aAttr->owner());
 461       if (aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 462         AttributeRefAttrPtr anAttrRefA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 463           aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_A()));
 464         AttributeRefAttrPtr anAttrRefB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 465           aConstrFeature->attribute(SketchPlugin_ConstraintCoincidence::ENTITY_B()));
 466         if(anAttrRefA.get() && !anAttrRefA->isObject()) {
 467           AttributePtr anAttrA = anAttrRefA->attr();
 468           if(anAttrBaseA == anAttrA) {
 469             aCoincident = aConstrFeature;
 470             break;
 471           }
 472         }
 473         if(anAttrRefA.get() && !anAttrRefB->isObject()) {
 474           AttributePtr anAttrB = anAttrRefB->attr();
 475           if(anAttrBaseA == anAttrB) {
 476             aCoincident = aConstrFeature;
 477             break;
 478           }
 479         }
 480       }
 481     }
 482
 483     if(!aCoincident.get()) {
 484       setError("No coincident edges at selected vertex");
 485       return;
 486     }
 487
 488     std::set<FeaturePtr> aCoinsides;
 489     SketchPlugin_Tools::findCoincidences(aCoincident,
 490                                          SketchPlugin_ConstraintCoincidence::ENTITY_A(),
 491                                          aCoinsides);
 492     SketchPlugin_Tools::findCoincidences(aCoincident,
 493                                          SketchPlugin_ConstraintCoincidence::ENTITY_B(),
 494                                          aCoinsides);
 495
 496     // Remove points
 497     std::set<FeaturePtr> aNewLines;
 498     for(std::set<FeaturePtr>::iterator anIt = aCoinsides.begin(); anIt != aCoinsides.end(); ++anIt) {
 499       if((*anIt)->getKind() != SketchPlugin_Point::ID()) {
 500         aNewLines.insert(*anIt);
 501       }
 502     }
 503     aCoinsides = aNewLines;
 504
 505     // Remove auxilary lines
 506     if(aCoinsides.size() > 2) {
 507       aNewLines.clear();
 508       for(std::set<FeaturePtr>::iterator anIt = aCoinsides.begin(); anIt != aCoinsides.end(); ++anIt) {
 509         if(!(*anIt)->boolean(SketchPlugin_SketchEntity::AUXILIARY_ID())->value()) {
 510           aNewLines.insert(*anIt);
 511         }
 512       }
 513       aCoinsides = aNewLines;
 514     }
 515
 516     if(aCoinsides.size() != 2) {
 517       setError("At selected vertex should be two coincident lines");
 518       return;
 519     }
 520
 521     // Store base lines
 522     FeaturePtr anOldFeatureA, anOldFeatureB;
 523     std::set<FeaturePtr>::iterator aLinesIt = aCoinsides.begin();
 524     anOldFeatureA = *aLinesIt++;
 525     anOldFeatureB = *aLinesIt;
 526     aRefListOfBaseLines->append(anOldFeatureA);
 527     aRefListOfBaseLines->append(anOldFeatureB);
 528
 529     // Getting points located at 1/3 of edge length from fillet point
 530     std::shared_ptr<GeomAPI_Pnt2d> aPntA, aPntB;
 531     getPointOnEdge(anOldFeatureA, aFilletPoint, aPntA);
 532     getPointOnEdge(anOldFeatureB, aFilletPoint, aPntB);
 533
 534     /// Getting distances
 535     double aRadius = 1;
 536     double aDistanceA = getProjectionDistance(anOldFeatureB, aPntA);
 537     double aDistanceB = getProjectionDistance(anOldFeatureA, aPntB);
 538     aRadius = aDistanceA < aDistanceB ? aDistanceA / 2.0 : aDistanceB / 2.0;
 539
 540     std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(data()->attribute(SketchPlugin_Constraint::VALUE()))->setValue(aRadius);
 541   }
 542 }
 543
 544 AISObjectPtr SketchPlugin_ConstraintFillet::getAISObject(AISObjectPtr thePrevious)
 545 {
 546   if (!sketch())
 547     return thePrevious;
 548
 549   AISObjectPtr anAIS = thePrevious;
 550   /// TODO: Equal constraint presentation should be put here
 551   return anAIS;
 552 }
 553
 554 bool SketchPlugin_ConstraintFillet::isMacro() const
 555 {
 556   return true;
 557 }
 558
 559
 560 // =========   Auxiliary functions   =================
 561 void recalculateAttributes(FeaturePtr theNewArc,  const std::string& theNewArcAttribute,
 562                            FeaturePtr theFeature, const std::string& theFeatureAttribute)
 563 {
 564   std::shared_ptr<GeomAPI_Pnt2d> anArcPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 565       theNewArc->attribute(theNewArcAttribute))->pnt();
 566   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 567       theFeature->attribute(theFeatureAttribute))->setValue(anArcPoint->x(), anArcPoint->y());
 568 }
 569
 570 /// \brief Find intersections of lines shifted along normal direction
 571 void possibleFilletCenterLineLine(
 572     std::shared_ptr<GeomAPI_XY> thePointA, std::shared_ptr<GeomAPI_Dir2d> theDirA,
 573     std::shared_ptr<GeomAPI_XY> thePointB, std::shared_ptr<GeomAPI_Dir2d> theDirB,
 574     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 575 {
 576   std::shared_ptr<GeomAPI_Dir2d> aDirAT(new GeomAPI_Dir2d(-theDirA->y(), theDirA->x()));
 577   std::shared_ptr<GeomAPI_Dir2d> aDirBT(new GeomAPI_Dir2d(-theDirB->y(), theDirB->x()));
 578   std::shared_ptr<GeomAPI_XY> aPntA, aPntB;
 579   double aDet = theDirA->cross(theDirB);
 580   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 581     aPntA = thePointA->added(aDirAT->xy()->multiplied(aStepA * theRadius));
 582     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 583       aPntB = thePointB->added(aDirBT->xy()->multiplied(aStepB * theRadius));
 584       double aVX = aDirAT->xy()->dot(aPntA);
 585       double aVY = aDirBT->xy()->dot(aPntB);
 586       std::shared_ptr<GeomAPI_XY> aPoint(new GeomAPI_XY(
 587           (theDirB->x() * aVX - theDirA->x() * aVY) / aDet,
 588           (theDirB->y() * aVX - theDirA->y() * aVY) / aDet));
 589       theCenters.push_back(aPoint);
 590     }
 591   }
 592 }
 593
 594 /// \brief Find intersections of line shifted along normal direction in both sides
 595 ///        and a circle with extended radius
 596 void possibleFilletCenterLineArc(
 597     std::shared_ptr<GeomAPI_XY> theStartLine, std::shared_ptr<GeomAPI_Dir2d> theDirLine,
 598     std::shared_ptr<GeomAPI_XY> theCenterArc, double theRadiusArc,
 599     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 600 {
 601   std::shared_ptr<GeomAPI_Dir2d> aDirT(new GeomAPI_Dir2d(-theDirLine->y(), theDirLine->x()));
 602   std::shared_ptr<GeomAPI_XY> aPnt;
 603   double aDirNorm2 = theDirLine->dot(theDirLine);
 604   double aRad = 0.0;
 605   double aDirX = theDirLine->x();
 606   double aDirX2 = theDirLine->x() * theDirLine->x();
 607   double aDirY2 = theDirLine->y() * theDirLine->y();
 608   double aDirXY = theDirLine->x() * theDirLine->y();
 609   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 610     aPnt = theStartLine->added(aDirT->xy()->multiplied(aStepA * theRadius));
 611     double aCoeff = aDirT->xy()->dot(aPnt->decreased(theCenterArc));
 612     double aCoeff2 = aCoeff * aCoeff;
 613     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 614       aRad = theRadiusArc + aStepB * theRadius;
 615       double aD = aRad * aRad * aDirNorm2 - aCoeff2;
 616       if (aD < 0.0)
 617         continue;
 618       double aDs = sqrt(aD);
 619       double x1 = theCenterArc->x() + (aCoeff * aDirT->x() - aDirT->y() * aDs) / aDirNorm2;
 620       double x2 = theCenterArc->x() + (aCoeff * aDirT->x() + aDirT->y() * aDs) / aDirNorm2;
 621       double y1 = (aDirX2 * aPnt->y() + aDirY2 * theCenterArc->y() -
 622           aDirXY * (aPnt->x() - theCenterArc->x()) - theDirLine->y() * aDs) / aDirNorm2;
 623       double y2 = (aDirX2 * aPnt->y() + aDirY2 * theCenterArc->y() -
 624           aDirXY * (aPnt->x() - theCenterArc->x()) + theDirLine->y() * aDs) / aDirNorm2;
 625
 626       std::shared_ptr<GeomAPI_XY> aPoint1(new GeomAPI_XY(x1, y1));
 627       theCenters.push_back(aPoint1);
 628       std::shared_ptr<GeomAPI_XY> aPoint2(new GeomAPI_XY(x2, y2));
 629       theCenters.push_back(aPoint2);
 630     }
 631   }
 632 }
 633
 634 /// \brief Find intersections of two circles with extended radii
 635 void possibleFilletCenterArcArc(
 636     std::shared_ptr<GeomAPI_XY> theCenterA, double theRadiusA,
 637     std::shared_ptr<GeomAPI_XY> theCenterB, double theRadiusB,
 638     double theRadius, std::list< std::shared_ptr<GeomAPI_XY> >& theCenters)
 639 {
 640   std::shared_ptr<GeomAPI_XY> aCenterDir = theCenterB->decreased(theCenterA);
 641   double aCenterDist2 = aCenterDir->dot(aCenterDir);
 642   double aCenterDist = sqrt(aCenterDist2);
 643
 644   double aRadA, aRadB;
 645   for (double aStepA = -1.0; aStepA <= 1.0; aStepA += 2.0) {
 646     aRadA = theRadiusA + aStepA * theRadius;
 647     for (double aStepB = -1.0; aStepB <= 1.0; aStepB += 2.0) {
 648       aRadB = theRadiusB + aStepB * theRadius;
 649       if (aRadA + aRadB < aCenterDist || fabs(aRadA - aRadB) > aCenterDist)
 650         continue; // there is no intersections
 651
 652       double aMedDist = (aRadA * aRadA - aRadB * aRadB + aCenterDist2) / (2.0 * aCenterDist);
 653       double aHeight = sqrt(aRadA * aRadA - aMedDist * aMedDist);
 654
 655       double x1 = theCenterA->x() + (aMedDist * aCenterDir->x() + aCenterDir->y() * aHeight) / aCenterDist;
 656       double y1 = theCenterA->y() + (aMedDist * aCenterDir->y() - aCenterDir->x() * aHeight) / aCenterDist;
 657
 658       double x2 = theCenterA->x() + (aMedDist * aCenterDir->x() - aCenterDir->y() * aHeight) / aCenterDist;
 659       double y2 = theCenterA->y() + (aMedDist * aCenterDir->y() + aCenterDir->x() * aHeight) / aCenterDist;
 660
 661       std::shared_ptr<GeomAPI_XY> aPoint1(new GeomAPI_XY(x1, y1));
 662       theCenters.push_back(aPoint1);
 663       std::shared_ptr<GeomAPI_XY> aPoint2(new GeomAPI_XY(x2, y2));
 664       theCenters.push_back(aPoint2);
 665     }
 666   }
 667 }
 668
 669 void calculateFilletCenter(FeaturePtr theFeatureA, FeaturePtr theFeatureB,
 670                            double theRadius, bool theNotInversed[2],
 671                            std::shared_ptr<GeomAPI_XY>& theCenter,
 672                            std::shared_ptr<GeomAPI_XY>& theTangentA,
 673                            std::shared_ptr<GeomAPI_XY>& theTangentB)
 674 {
 675   static const int aNbFeatures = 2;
 676   FeaturePtr aFeature[aNbFeatures] = {theFeatureA, theFeatureB};
 677   std::shared_ptr<GeomAPI_XY> aStart[aNbFeatures], aEnd[aNbFeatures], aCenter[aNbFeatures];
 678   std::shared_ptr<GeomDataAPI_Point2D> aStartPoint, aEndPoint;
 679
 680   for (int i = 0; i < aNbFeatures; i++) {
 681     if (aFeature[i]->getKind() == SketchPlugin_Line::ID()) {
 682       aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 683           aFeature[i]->attribute(SketchPlugin_Line::START_ID()));
 684       aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 685           aFeature[i]->attribute(SketchPlugin_Line::END_ID()));
 686     } else if (aFeature[i]->getKind() == SketchPlugin_Arc::ID()) {
 687       aStartPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 688           aFeature[i]->attribute(SketchPlugin_Arc::START_ID()));
 689       aEndPoint = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 690           aFeature[i]->attribute(SketchPlugin_Arc::END_ID()));
 691       aCenter[i] = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 692           aFeature[i]->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt()->xy();
 693     } else
 694       return;
 695     aStart[i] = std::shared_ptr<GeomAPI_XY>(theNotInversed[i] ?
 696         new GeomAPI_XY(aStartPoint->x(), aStartPoint->y()) :
 697         new GeomAPI_XY(aEndPoint->x(), aEndPoint->y()));
 698     aEnd[i] = std::shared_ptr<GeomAPI_XY>(theNotInversed[i] ?
 699         new GeomAPI_XY(aEndPoint->x(), aEndPoint->y()) :
 700         new GeomAPI_XY(aStartPoint->x(), aStartPoint->y()));
 701   }
 702
 703   if (theFeatureA->getKind() == SketchPlugin_Line::ID() &&
 704       theFeatureB->getKind() == SketchPlugin_Line::ID()) {
 705     std::shared_ptr<GeomAPI_Dir2d> aDir[2];
 706     std::shared_ptr<GeomAPI_Dir2d> aDirT[2];
 707     for (int i = 0; i < aNbFeatures; i++) {
 708       aDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(aEnd[i]->decreased(aStart[i])));
 709       aDirT[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(-aDir[i]->y(), aDir[i]->x()));
 710     }
 711
 712     // get and filter possible centers
 713     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 714     possibleFilletCenterLineLine(aStart[0], aDir[0], aStart[1], aDir[1], theRadius, aSuspectCenters);
 715     double aDot = 0.0;
 716     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 717     for (; anIt != aSuspectCenters.end(); anIt++) {
 718       aDot = aDirT[0]->xy()->dot(aStart[0]->decreased(*anIt));
 719       theTangentA = (*anIt)->added(aDirT[0]->xy()->multiplied(aDot));
 720       if (theTangentA->decreased(aStart[0])->dot(aDir[0]->xy()) < 0.0)
 721         continue; // incorrect position
 722       aDot = aDirT[1]->xy()->dot(aStart[1]->decreased(*anIt));
 723       theTangentB = (*anIt)->added(aDirT[1]->xy()->multiplied(aDot));
 724       if (theTangentB->decreased(aStart[1])->dot(aDir[1]->xy()) < 0.0)
 725         continue; // incorrect position
 726       // the center is found, stop searching
 727       theCenter = *anIt;
 728       return;
 729     }
 730   } else if ((theFeatureA->getKind() == SketchPlugin_Arc::ID() &&
 731       theFeatureB->getKind() == SketchPlugin_Line::ID()) ||
 732       (theFeatureA->getKind() == SketchPlugin_Line::ID() &&
 733       theFeatureB->getKind() == SketchPlugin_Arc::ID())) {
 734     int aLineInd = theFeatureA->getKind() == SketchPlugin_Line::ID() ? 0 : 1;
 735     double anArcRadius = aStart[1-aLineInd]->distance(aCenter[1-aLineInd]);
 736     std::shared_ptr<GeomAPI_Dir2d> aDirLine = std::shared_ptr<GeomAPI_Dir2d>(
 737         new GeomAPI_Dir2d(aEnd[aLineInd]->decreased(aStart[aLineInd])));
 738     std::shared_ptr<GeomAPI_Dir2d> aDirT = std::shared_ptr<GeomAPI_Dir2d>(
 739         new GeomAPI_Dir2d(-aDirLine->y(), aDirLine->x()));
 740
 741     std::shared_ptr<GeomAPI_Dir2d> aStartArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 742         new GeomAPI_Dir2d(aStart[1-aLineInd]->decreased(aCenter[1-aLineInd])));
 743     std::shared_ptr<GeomAPI_Dir2d> aEndArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 744         new GeomAPI_Dir2d(aEnd[1-aLineInd]->decreased(aCenter[1-aLineInd])));
 745     double anArcAngle = aEndArcDir->angle(aStartArcDir);
 746
 747     // get possible centers and filter them
 748     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 749     possibleFilletCenterLineArc(aStart[aLineInd], aDirLine, aCenter[1-aLineInd], anArcRadius, theRadius, aSuspectCenters);
 750     double aDot = 0.0;
 751     // the line is forward into the arc
 752     double innerArc = aCenter[1-aLineInd]->decreased(aStart[aLineInd])->dot(aDirLine->xy());
 753     std::shared_ptr<GeomAPI_XY> aLineTgPoint, anArcTgPoint;
 754     // The possible centers are ranged by their positions.
 755     // If the point is not satisfy one of criteria, the weight is decreased with penalty.
 756     int aBestWeight = 0;
 757     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 758     for (; anIt != aSuspectCenters.end(); anIt++) {
 759       int aWeight = 2;
 760       aDot = aDirT->xy()->dot(aStart[aLineInd]->decreased(*anIt));
 761       aLineTgPoint = (*anIt)->added(aDirT->xy()->multiplied(aDot));
 762       // Check the point is placed on the correct arc (penalty if false)
 763       if (aCenter[1-aLineInd]->distance(*anIt) * innerArc > anArcRadius * innerArc)
 764         aWeight -= 1;
 765       std::shared_ptr<GeomAPI_Dir2d> aCurDir = std::shared_ptr<GeomAPI_Dir2d>(
 766           new GeomAPI_Dir2d((*anIt)->decreased(aCenter[1-aLineInd])));
 767       double aCurAngle = aCurDir->angle(aStartArcDir);
 768       if (anArcAngle < 0.0) aCurAngle *= -1.0;
 769       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle))
 770         continue;
 771       if (aWeight > aBestWeight)
 772         aBestWeight = aWeight;
 773       else if (aWeight < aBestWeight ||
 774                aStart[aLineInd]->distance(*anIt) >
 775                aStart[aLineInd]->distance(theCenter)) // <-- take closer point
 776         continue;
 777       // the center is found, stop searching
 778       theCenter = *anIt;
 779       anArcTgPoint = aCenter[1-aLineInd]->added(aCurDir->xy()->multiplied(anArcRadius));
 780       if (theFeatureA->getKind() == SketchPlugin_Line::ID()) {
 781         theTangentA = aLineTgPoint;
 782         theTangentB = anArcTgPoint;
 783       } else {
 784         theTangentA = anArcTgPoint;
 785         theTangentB = aLineTgPoint;
 786       }
 787       //return;
 788     }
 789   } else if (theFeatureA->getKind() == SketchPlugin_Arc::ID() &&
 790       theFeatureB->getKind() == SketchPlugin_Arc::ID()) {
 791     double anArcRadius[aNbFeatures];
 792     double anArcAngle[aNbFeatures];
 793     std::shared_ptr<GeomAPI_Dir2d> aStartArcDir[aNbFeatures];
 794     for (int i = 0; i < aNbFeatures; i++) {
 795       anArcRadius[i] = aStart[i]->distance(aCenter[i]);
 796       aStartArcDir[i] = std::shared_ptr<GeomAPI_Dir2d>(
 797           new GeomAPI_Dir2d(aStart[i]->decreased(aCenter[i])));
 798       std::shared_ptr<GeomAPI_Dir2d> aEndArcDir = std::shared_ptr<GeomAPI_Dir2d>(
 799           new GeomAPI_Dir2d(aEnd[i]->decreased(aCenter[i])));
 800       anArcAngle[i] = aEndArcDir->angle(aStartArcDir[i]);
 801     }
 802
 803     // get and filter possible centers
 804     std::list< std::shared_ptr<GeomAPI_XY> > aSuspectCenters;
 805     possibleFilletCenterArcArc(aCenter[0], anArcRadius[0], aCenter[1], anArcRadius[1], theRadius, aSuspectCenters);
 806     double aDot = 0.0;
 807     std::shared_ptr<GeomAPI_XY> aLineTgPoint, anArcTgPoint;
 808     std::list< std::shared_ptr<GeomAPI_XY> >::iterator anIt = aSuspectCenters.begin();
 809     for (; anIt != aSuspectCenters.end(); anIt++) {
 810       std::shared_ptr<GeomAPI_Dir2d> aCurDir = std::shared_ptr<GeomAPI_Dir2d>(
 811           new GeomAPI_Dir2d((*anIt)->decreased(aCenter[0])));
 812       double aCurAngle = aCurDir->angle(aStartArcDir[0]);
 813       if (anArcAngle[0] < 0.0) aCurAngle *= -1.0;
 814       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle[0]))
 815         continue; // incorrect position
 816       theTangentA = aCenter[0]->added(aCurDir->xy()->multiplied(anArcRadius[0]));
 817
 818       aCurDir = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d((*anIt)->decreased(aCenter[1])));
 819       aCurAngle = aCurDir->angle(aStartArcDir[1]);
 820       if (anArcAngle[1] < 0.0) aCurAngle *= -1.0;
 821       if (aCurAngle < 0.0 || aCurAngle > fabs(anArcAngle[1]))
 822         continue; // incorrect position
 823       theTangentB = aCenter[1]->added(aCurDir->xy()->multiplied(anArcRadius[1]));
 824
 825       // the center is found, stop searching
 826       theCenter = *anIt;
 827       return;
 828     }
 829   }
 830 }
 831
 832 void getPointOnEdge(const FeaturePtr theFeature,
 833                     const std::shared_ptr<GeomAPI_Pnt2d> theFilletPoint,
 834                     std::shared_ptr<GeomAPI_Pnt2d>& thePoint) {
 835   if(theFeature->getKind() == SketchPlugin_Line::ID()) {
 836     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 837       theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
 838     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 839       theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
 840     if(aPntStart->distance(theFilletPoint) > 1.e-7) {
 841       aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 842         theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
 843       aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 844         theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
 845     }
 846     thePoint.reset( new GeomAPI_Pnt2d(aPntStart->xy()->added( aPntEnd->xy()->decreased( aPntStart->xy() )->multiplied(1.0 / 3.0) ) ) );
 847   } else {
 848     std::shared_ptr<GeomAPI_Pnt2d> aPntTemp;
 849     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 850       theFeature->attribute(SketchPlugin_Arc::START_ID()))->pnt();
 851     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 852       theFeature->attribute(SketchPlugin_Arc::END_ID()))->pnt();
 853     if(theFeature->attribute(SketchPlugin_Arc::INVERSED_ID())) {
 854       aPntTemp = aPntStart;
 855       aPntStart = aPntEnd;
 856       aPntEnd = aPntTemp;
 857     }
 858     std::shared_ptr<GeomAPI_Pnt2d> aCenterPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 859       theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
 860     std::shared_ptr<GeomAPI_Circ2d> aCirc(new GeomAPI_Circ2d(aCenterPnt, aPntStart));
 861     double aStartParameter(0), anEndParameter(0);
 862     aCirc->parameter(aPntStart, paramTolerance, aStartParameter);
 863     aCirc->parameter(aPntEnd, paramTolerance, anEndParameter);
 864     if(aPntStart->distance(theFilletPoint) > tolerance) {
 865       double aTmpParameter = aStartParameter;
 866       aStartParameter = anEndParameter;
 867       anEndParameter = aTmpParameter;
 868     }
 869     double aPntParameter = aStartParameter + (anEndParameter - aStartParameter) / 3.0;
 870     aCirc->D0(aPntParameter, thePoint);
 871   }
 872 }
 873
 874 double getProjectionDistance(const FeaturePtr theFeature,
 875                              const std::shared_ptr<GeomAPI_Pnt2d> thePoint)
 876 {
 877   std::shared_ptr<GeomAPI_Pnt2d> aProjectPnt;
 878   if(theFeature->getKind() == SketchPlugin_Line::ID()) {
 879     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 880       theFeature->attribute(SketchPlugin_Line::START_ID()))->pnt();
 881     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 882       theFeature->attribute(SketchPlugin_Line::END_ID()))->pnt();
 883     std::shared_ptr<GeomAPI_Lin2d> aLin(new GeomAPI_Lin2d(aPntStart, aPntEnd));
 884     aProjectPnt = aLin->project(thePoint);
 885   } else {
 886     std::shared_ptr<GeomAPI_Pnt2d> aPntStart = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 887       theFeature->attribute(SketchPlugin_Arc::START_ID()))->pnt();
 888     std::shared_ptr<GeomAPI_Pnt2d> aPntEnd = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 889       theFeature->attribute(SketchPlugin_Arc::END_ID()))->pnt();
 890     std::shared_ptr<GeomAPI_Pnt2d> aCenterPnt = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 891       theFeature->attribute(SketchPlugin_Arc::CENTER_ID()))->pnt();
 892     std::shared_ptr<GeomAPI_Circ2d> aCirc(new GeomAPI_Circ2d(aCenterPnt, aPntStart));
 893     aProjectPnt = aCirc->project(thePoint);
 894   }
 895   if(aProjectPnt.get()) {
 896     return aProjectPnt->distance(thePoint);
 897   }
 898   return -1;
 899 }