src/SketchSolver/PlaneGCSSolver/PlaneGCSSolver_Storage.cpp

   1 // Copyright (C) 2014-2019  CEA/DEN, EDF R&D
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Lesser General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2.1 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Lesser General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU Lesser General Public
  14 // License along with this library; if not, write to the Free Software
  15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  16 //
  17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
  18 //
  19
  20 #include <PlaneGCSSolver_Storage.h>
  21 #include <PlaneGCSSolver_Solver.h>
  22 #include <PlaneGCSSolver_BooleanWrapper.h>
  23 #include <PlaneGCSSolver_ConstraintWrapper.h>
  24 #include <PlaneGCSSolver_EdgeWrapper.h>
  25 #include <PlaneGCSSolver_PointWrapper.h>
  26 #include <PlaneGCSSolver_Tools.h>
  27
  28 #include <PlaneGCSSolver_AttributeBuilder.h>
  29 #include <PlaneGCSSolver_FeatureBuilder.h>
  30 #include <PlaneGCSSolver_EntityDestroyer.h>
  31
  32 #include <GeomAPI_Dir2d.h>
  33 #include <GeomAPI_Pnt2d.h>
  34 #include <GeomAPI_XY.h>
  35 #include <GeomDataAPI_Point2D.h>
  36 #include <ModelAPI_AttributeRefAttr.h>
  37 #include <SketchPlugin_Ellipse.h>
  38 #include <SketchPlugin_Projection.h>
  39
  40 #include <cmath>
  41
  42
  43 static void constraintsToSolver(const ConstraintWrapperPtr& theConstraint,
  44                                 const SolverPtr& theSolver)
  45 {
  46   const std::list<GCSConstraintPtr>& aConstraints =
  47       std::dynamic_pointer_cast<PlaneGCSSolver_ConstraintWrapper>(theConstraint)->constraints();
  48   theSolver->addConstraint(theConstraint->id(), aConstraints);
  49 }
  50
  51
  52 PlaneGCSSolver_Storage::PlaneGCSSolver_Storage(const SolverPtr& theSolver)
  53   : SketchSolver_Storage(theSolver),
  54     myConstraintLastID(CID_UNKNOWN)
  55 {
  56 }
  57
  58 void PlaneGCSSolver_Storage::addConstraint(
  59     ConstraintPtr        theConstraint,
  60     ConstraintWrapperPtr theSolverConstraint)
  61 {
  62   SketchSolver_Storage::addConstraint(theConstraint, theSolverConstraint);
  63
  64   theSolverConstraint->setId(++myConstraintLastID);
  65   constraintsToSolver(theSolverConstraint, mySketchSolver);
  66 }
  67
  68 void PlaneGCSSolver_Storage::addMovementConstraint(
  69     const ConstraintWrapperPtr& theSolverConstraint)
  70 {
  71   // before adding movement constraint to solver, re-check its DOF
  72   if (mySketchSolver->dof() == 0)
  73     mySketchSolver->diagnose();
  74
  75   theSolverConstraint->setId(CID_MOVEMENT);
  76   constraintsToSolver(theSolverConstraint, mySketchSolver);
  77 }
  78
  79
  80 EntityWrapperPtr PlaneGCSSolver_Storage::createFeature(
  81     const FeaturePtr&             theFeature,
  82     PlaneGCSSolver_EntityBuilder* theBuilder)
  83 {
  84   std::list<AttributePtr> anAttributes = theFeature->data()->attributes(std::string());
  85   std::list<AttributePtr>::const_iterator anIt = anAttributes.begin();
  86   for (; anIt != anAttributes.end(); ++anIt)
  87     createAttribute(*anIt, theBuilder);
  88
  89   EntityWrapperPtr aResult = theBuilder->createFeature(theFeature);
  90   if (aResult)
  91     addEntity(theFeature, aResult);
  92   return aResult;
  93 }
  94
  95 EntityWrapperPtr PlaneGCSSolver_Storage::createAttribute(
  96     const AttributePtr&           theAttribute,
  97     PlaneGCSSolver_EntityBuilder* theBuilder)
  98 {
  99   EntityWrapperPtr aResult = theBuilder->createAttribute(theAttribute);
 100   if (aResult)
 101     addEntity(theAttribute, aResult);
 102   return aResult;
 103 }
 104
 105 /// \brief Update value
 106 static bool updateValue(const double& theSource, double& theDest)
 107 {
 108   static const double aTol = 1000. * tolerance;
 109   bool isUpdated = fabs(theSource - theDest) > aTol;
 110   if (isUpdated)
 111     theDest = theSource;
 112   return isUpdated;
 113 }
 114
 115 /// \brief Update coordinates of the point or scalar using its base attribute
 116 static bool updateValues(AttributePtr& theAttribute, EntityWrapperPtr& theEntity)
 117 {
 118   bool isUpdated = false;
 119
 120   std::shared_ptr<GeomDataAPI_Point2D> aPoint2D =
 121       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(theAttribute);
 122   if (aPoint2D) {
 123     const GCSPointPtr& aGCSPoint =
 124         std::dynamic_pointer_cast<PlaneGCSSolver_PointWrapper>(theEntity)->point();
 125     isUpdated = updateValue(aPoint2D->x(), *(aGCSPoint->x)) || isUpdated;
 126     isUpdated = updateValue(aPoint2D->y(), *(aGCSPoint->y)) || isUpdated;
 127   } else {
 128     AttributeDoublePtr aScalar =
 129         std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(theAttribute);
 130     if (aScalar) {
 131       ScalarWrapperPtr aWrapper =
 132           std::dynamic_pointer_cast<PlaneGCSSolver_ScalarWrapper>(theEntity);
 133       // There is possible angular value, which is converted between degrees and radians.
 134       // So, we use its value instead of using direct pointer to value.
 135       double aValue = aWrapper->value();
 136       isUpdated = updateValue(aScalar->value(), aValue);
 137       if (isUpdated)
 138         aWrapper->setValue(aValue);
 139     } else {
 140       AttributeBooleanPtr aBoolean =
 141           std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(theAttribute);
 142       if (aBoolean) {
 143         BooleanWrapperPtr aWrapper =
 144             std::dynamic_pointer_cast<PlaneGCSSolver_BooleanWrapper>(theEntity);
 145         isUpdated = aWrapper->value() != aBoolean->value();
 146         aWrapper->setValue(aBoolean->value());
 147       }
 148     }
 149   }
 150
 151   return isUpdated;
 152 }
 153
 154 static bool hasReference(std::shared_ptr<SketchPlugin_Feature> theFeature,
 155                          const std::string& theFeatureKind)
 156 {
 157   const std::set<AttributePtr>& aRefs = theFeature->data()->refsToMe();
 158   for (std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin();
 159        aRefIt != aRefs.end(); ++aRefIt) {
 160      FeaturePtr anOwner = ModelAPI_Feature::feature((*aRefIt)->owner());
 161      if (anOwner && anOwner->getKind() == theFeatureKind)
 162        return true;
 163   }
 164   return false;
 165 }
 166
 167 static bool isCopyFeature(std::shared_ptr<SketchPlugin_Feature> theFeature)
 168 {
 169   return theFeature && theFeature->isCopy();
 170 }
 171
 172 bool PlaneGCSSolver_Storage::update(FeaturePtr theFeature, bool theForce)
 173 {
 174   bool sendNotify = false;
 175   bool isUpdated = false;
 176   std::shared_ptr<SketchPlugin_Feature> aSketchFeature =
 177       std::dynamic_pointer_cast<SketchPlugin_Feature>(theFeature);
 178   EntityWrapperPtr aRelated = entity(theFeature);
 179   if (aRelated) // send signal to subscribers
 180     sendNotify = true;
 181   else { // Feature is not exist, create it
 182     bool isCopy = isCopyFeature(aSketchFeature);
 183     bool isProjReferred = hasReference(aSketchFeature, SketchPlugin_Projection::ID());
 184     // the feature is a copy in "Multi" constraint and does not used in other constraints
 185     if (!theForce && (isCopy && !isProjReferred) &&
 186         myFeatureMap.find(theFeature) == myFeatureMap.end())
 187       return false;
 188
 189     // external feature processing
 190     bool isExternal =
 191         (aSketchFeature && (aSketchFeature->isExternal() || isCopy || isProjReferred));
 192
 193     PlaneGCSSolver_FeatureBuilder aBuilder(isExternal ? 0 : this);
 194
 195     // Reserve the feature in the map of features
 196     // (do not want to add several copies of it while adding attributes)
 197     aRelated = createFeature(theFeature, &aBuilder);
 198     myFeatureMap[theFeature] = aRelated;
 199     createAuxiliaryConstraints(aRelated);
 200     isUpdated = true;
 201   }
 202
 203   std::list<AttributePtr> anAttributes = theFeature->data()->attributes(std::string());
 204   std::list<AttributePtr>::iterator anAttrIt = anAttributes.begin();
 205   for (; anAttrIt != anAttributes.end(); ++anAttrIt)
 206     if ((*anAttrIt)->attributeType() == GeomDataAPI_Point2D::typeId() ||
 207         (*anAttrIt)->attributeType() == ModelAPI_AttributeDouble::typeId() ||
 208         (*anAttrIt)->attributeType() == ModelAPI_AttributeBoolean::typeId())
 209       isUpdated = update(*anAttrIt) || isUpdated;
 210
 211   // check external attribute is changed
 212   bool isExternal = aSketchFeature &&
 213                    (aSketchFeature->isExternal() || isCopyFeature(aSketchFeature));
 214   if (aRelated && isExternal != aRelated->isExternal()) {
 215     if (isExternal)
 216       makeExternal(aRelated);
 217     else
 218       makeNonExternal(aRelated);
 219     isUpdated = true;
 220   }
 221
 222   // send notification to listeners due to at least one attribute is changed
 223   if (sendNotify && isUpdated)
 224     notify(theFeature);
 225
 226   // update arc
 227   if (aRelated && aRelated->type() == ENTITY_ARC) {
 228     /// TODO: this code should be shared with FeatureBuilder somehow
 229
 230     std::shared_ptr<PlaneGCSSolver_EdgeWrapper> anEntity =
 231       std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(aRelated);
 232     std::shared_ptr<GCS::Arc> anArc = std::dynamic_pointer_cast<GCS::Arc>(anEntity->entity());
 233
 234     static std::shared_ptr<GeomAPI_Dir2d> OX(new GeomAPI_Dir2d(1.0, 0.0));
 235     std::shared_ptr<GeomAPI_Pnt2d> aCenter(
 236       new GeomAPI_Pnt2d(*anArc->center.x, *anArc->center.y));
 237     std::shared_ptr<GeomAPI_Pnt2d> aStart(
 238       new GeomAPI_Pnt2d(*anArc->start.x, *anArc->start.y));
 239
 240     *anArc->rad = aStart->distance(aCenter);
 241
 242     std::shared_ptr<GeomAPI_Dir2d> aDir(new GeomAPI_Dir2d(aStart->xy()->decreased(aCenter->xy())));
 243     *anArc->startAngle = OX->angle(aDir);
 244
 245     aDir = std::shared_ptr<GeomAPI_Dir2d>(
 246       new GeomAPI_Dir2d((*anArc->end.x) - aCenter->x(), (*anArc->end.y) - aCenter->y()));
 247     *anArc->endAngle = OX->angle(aDir);
 248   }
 249
 250   return isUpdated;
 251 }
 252
 253 bool PlaneGCSSolver_Storage::update(AttributePtr theAttribute, bool theForce)
 254 {
 255   if (!theAttribute->isInitialized())
 256     return false;
 257
 258   AttributePtr anAttribute = theAttribute;
 259   AttributeRefAttrPtr aRefAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(anAttribute);
 260   if (aRefAttr) {
 261     if (aRefAttr->isObject()) {
 262       FeaturePtr aFeature;
 263       /// TODO: Check resultToFeatureOrAttribute() precisely.
 264       resultToFeatureOrAttribute(aRefAttr->object(), aFeature, anAttribute);
 265       if (aFeature)
 266         return update(aFeature, theForce);
 267     } else
 268       anAttribute = aRefAttr->attr();
 269   }
 270
 271   EntityWrapperPtr aRelated = entity(anAttribute);
 272   FeaturePtr aFeature = ModelAPI_Feature::feature(anAttribute->owner());
 273   if (!aRelated) { // Attribute does not exist, create it.
 274     // First of all check if the parent feature exists. If not, add it.
 275     if (aFeature && myFeatureMap.find(aFeature) == myFeatureMap.end())
 276       return update(aFeature, theForce); // theAttribute has been processed while adding feature
 277     return aRelated.get() != 0;
 278   }
 279
 280   bool isUpdated = updateValues(anAttribute, aRelated);
 281   if (isUpdated) {
 282     setNeedToResolve(true);
 283     notify(aFeature);
 284   }
 285   return isUpdated;
 286 }
 287
 288 void PlaneGCSSolver_Storage::makeExternal(const EntityWrapperPtr& theEntity)
 289 {
 290   if (theEntity->isExternal())
 291     return;
 292
 293   removeAuxiliaryConstraints(theEntity);
 294
 295   GCS::SET_pD aParameters = PlaneGCSSolver_Tools::parameters(theEntity);
 296   mySketchSolver->removeParameters(aParameters);
 297   theEntity->setExternal(true);
 298   myNeedToResolve = true;
 299 }
 300
 301 void PlaneGCSSolver_Storage::makeNonExternal(const EntityWrapperPtr& theEntity)
 302 {
 303   if (!theEntity->isExternal())
 304     return;
 305
 306   GCS::SET_pD aParameters = PlaneGCSSolver_Tools::parameters(theEntity);
 307   mySketchSolver->addParameters(aParameters);
 308   theEntity->setExternal(false);
 309
 310   createAuxiliaryConstraints(theEntity);
 311
 312   myNeedToResolve = true;
 313 }
 314
 315
 316 static void createArcConstraints(const EntityWrapperPtr& theArc,
 317                                  const SolverPtr& theSolver,
 318                                  const ConstraintID theConstraintID,
 319                                  std::map<EntityWrapperPtr, ConstraintWrapperPtr>& theConstraints)
 320 {
 321   EdgeWrapperPtr anEdge = std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(theArc);
 322   std::shared_ptr<GCS::Arc> anArc = std::dynamic_pointer_cast<GCS::Arc>(anEdge->entity());
 323
 324   // Additional constaints to fix arc's extra DoF (if the arc is not external):
 325   std::list<GCSConstraintPtr> anArcConstraints;
 326   // 1. distances from center till start and end points are equal to radius
 327   anArcConstraints.push_back(GCSConstraintPtr(new GCS::ConstraintP2PDistance(
 328       anArc->center, anArc->start, anArc->rad)));
 329   anArcConstraints.push_back(GCSConstraintPtr(new GCS::ConstraintP2PDistance(
 330       anArc->center, anArc->end, anArc->rad)));
 331   // 2. angles of start and end points should be equal to the arc angles
 332   anArcConstraints.push_back(GCSConstraintPtr(new GCS::ConstraintP2PAngle(
 333       anArc->center, anArc->start, anArc->startAngle)));
 334   anArcConstraints.push_back(GCSConstraintPtr(new GCS::ConstraintP2PAngle(
 335       anArc->center, anArc->end, anArc->endAngle)));
 336
 337   ConstraintWrapperPtr aWrapper(
 338     new PlaneGCSSolver_ConstraintWrapper(anArcConstraints, CONSTRAINT_UNKNOWN));
 339   aWrapper->setId(theConstraintID);
 340   constraintsToSolver(aWrapper, theSolver);
 341
 342   theConstraints[theArc] = aWrapper;
 343 }
 344
 345 static void createEllipseConstraints(
 346     const EntityWrapperPtr& theEllipse,
 347     const SolverPtr& theSolver,
 348     const ConstraintID theConstraintID,
 349     std::map<EntityWrapperPtr, ConstraintWrapperPtr>& theConstraints)
 350 {
 351   EdgeWrapperPtr anEdge = std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(theEllipse);
 352   std::shared_ptr<GCS::Ellipse> anEllipse =
 353       std::dynamic_pointer_cast<GCS::Ellipse>(anEdge->entity());
 354
 355   // Additional constaints to fix ellipse's extra points
 356   std::list<GCSConstraintPtr> anEllipseConstraints;
 357
 358   const std::map<std::string, EntityWrapperPtr>& anAttributes = theEllipse->additionalAttributes();
 359   for (std::map<std::string, EntityWrapperPtr>::const_iterator anIt = anAttributes.begin();
 360        anIt != anAttributes.end(); ++anIt) {
 361     std::shared_ptr<PlaneGCSSolver_PointWrapper> aPoint =
 362         std::dynamic_pointer_cast<PlaneGCSSolver_PointWrapper>(anIt->second);
 363     if (!aPoint)
 364       continue;
 365
 366     GCS::InternalAlignmentType anAlignmentX, anAlignmentY;
 367     if (anIt->first == SketchPlugin_Ellipse::SECOND_FOCUS_ID())
 368       anAlignmentX = GCS::EllipseFocus2X;
 369     else if (anIt->first == SketchPlugin_Ellipse::MAJOR_AXIS_START_ID())
 370       anAlignmentX = GCS::EllipseNegativeMajorX;
 371     else if (anIt->first == SketchPlugin_Ellipse::MAJOR_AXIS_END_ID())
 372       anAlignmentX = GCS::EllipsePositiveMajorX;
 373     else if (anIt->first == SketchPlugin_Ellipse::MINOR_AXIS_START_ID())
 374       anAlignmentX = GCS::EllipseNegativeMinorX;
 375     else if (anIt->first == SketchPlugin_Ellipse::MINOR_AXIS_END_ID())
 376       anAlignmentX = GCS::EllipsePositiveMinorX;
 377
 378     anEllipseConstraints.push_back(GCSConstraintPtr(
 379         new GCS::ConstraintInternalAlignmentPoint2Ellipse(
 380         *anEllipse, *(aPoint->point()), anAlignmentX)));
 381     anAlignmentY = (GCS::InternalAlignmentType)((int)anAlignmentX + 1);
 382     anEllipseConstraints.push_back(GCSConstraintPtr(
 383         new GCS::ConstraintInternalAlignmentPoint2Ellipse(
 384         *anEllipse, *(aPoint->point()), anAlignmentY)));
 385   }
 386
 387   // constraint to bind the major radius value
 388   std::shared_ptr<PlaneGCSSolver_PointWrapper> aMajorAxisStart =
 389       std::dynamic_pointer_cast<PlaneGCSSolver_PointWrapper>(
 390       anAttributes.at(SketchPlugin_Ellipse::MAJOR_AXIS_START_ID()));
 391   ScalarWrapperPtr aMajorRadius =
 392       std::dynamic_pointer_cast<PlaneGCSSolver_ScalarWrapper>(
 393       anAttributes.at(SketchPlugin_Ellipse::MAJOR_RADIUS_ID()));
 394   anEllipseConstraints.push_back(GCSConstraintPtr(new GCS::ConstraintP2PDistance(
 395       anEllipse->center, *(aMajorAxisStart->point()), aMajorRadius->scalar())));
 396
 397   ConstraintWrapperPtr aWrapper(
 398     new PlaneGCSSolver_ConstraintWrapper(anEllipseConstraints, CONSTRAINT_UNKNOWN));
 399   aWrapper->setId(theConstraintID);
 400   constraintsToSolver(aWrapper, theSolver);
 401
 402   theConstraints[theEllipse] = aWrapper;
 403 }
 404
 405 void PlaneGCSSolver_Storage::createAuxiliaryConstraints(const EntityWrapperPtr& theEntity)
 406 {
 407   if (!theEntity || theEntity->isExternal())
 408     return;
 409
 410   if (theEntity->type() == ENTITY_ARC)
 411     createArcConstraints(theEntity, mySketchSolver, ++myConstraintLastID, myAuxConstraintMap);
 412   else if (theEntity->type() == ENTITY_ELLIPSE)
 413     createEllipseConstraints(theEntity, mySketchSolver, ++myConstraintLastID, myAuxConstraintMap);
 414 }
 415
 416 void PlaneGCSSolver_Storage::removeAuxiliaryConstraints(const EntityWrapperPtr& theEntity)
 417 {
 418   std::map<EntityWrapperPtr, ConstraintWrapperPtr>::iterator
 419       aFound = myAuxConstraintMap.find(theEntity);
 420   if (aFound != myAuxConstraintMap.end()) {
 421     mySketchSolver->removeConstraint(aFound->second->id());
 422     myAuxConstraintMap.erase(aFound);
 423   }
 424 }
 425
 426 void PlaneGCSSolver_Storage::adjustParametrizationOfArcs()
 427 {
 428   std::map<EntityWrapperPtr, ConstraintWrapperPtr>::iterator anIt = myAuxConstraintMap.begin();
 429   for (; anIt != myAuxConstraintMap.end(); ++anIt) {
 430     EdgeWrapperPtr anEdge = std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(anIt->first);
 431     std::shared_ptr<GCS::Arc> anArc = std::dynamic_pointer_cast<GCS::Arc>(anEdge->entity());
 432     if (!anArc)
 433       continue;
 434     // tune start angle of the arc to be in [0, 2PI]
 435     while (*anArc->startAngle < -PI)
 436       *anArc->startAngle += 2.0 * PI;
 437     while (*anArc->startAngle >= PI)
 438       *anArc->startAngle -= 2.0 * PI;
 439     // adjust end angle of the arc
 440     if (anEdge->isReversed()) {
 441       while (*anArc->endAngle > *anArc->startAngle)
 442         *anArc->endAngle -= 2.0 * PI;
 443       while (*anArc->endAngle + 2 * PI < *anArc->startAngle)
 444         *anArc->endAngle += 2.0 * PI;
 445     } else {
 446       while (*anArc->endAngle < *anArc->startAngle)
 447         *anArc->endAngle += 2.0 * PI;
 448       while (*anArc->endAngle > *anArc->startAngle + 2 * PI)
 449         *anArc->endAngle -= 2.0 * PI;
 450     }
 451   }
 452
 453   // update parameters of Middle point constraint for point on arc
 454   std::map<ConstraintPtr, ConstraintWrapperPtr>::iterator aCIt = myConstraintMap.begin();
 455   for (; aCIt != myConstraintMap.end(); ++aCIt)
 456     if (aCIt->second->type() == CONSTRAINT_MIDDLE_POINT) {
 457       notify(aCIt->first);
 458     }
 459 }
 460
 461
 462 bool PlaneGCSSolver_Storage::removeConstraint(ConstraintPtr theConstraint)
 463 {
 464   std::map<ConstraintPtr, ConstraintWrapperPtr>::iterator
 465       aFound = myConstraintMap.find(theConstraint);
 466   if (aFound != myConstraintMap.end()) {
 467     ConstraintWrapperPtr aCW = aFound->second;
 468     ConstraintID anID = aCW->id();
 469
 470     // Remove solver's constraints
 471     mySketchSolver->removeConstraint(anID);
 472
 473     // Remove value if exists
 474     const ScalarWrapperPtr& aValue = aCW->valueParameter();
 475     if (aValue) {
 476       GCS::SET_pD aParToRemove;
 477       aParToRemove.insert(aValue->scalar());
 478       removeParameters(aParToRemove);
 479     }
 480
 481     // Remove constraint
 482     myConstraintMap.erase(aFound);
 483
 484     if (anID != CID_MOVEMENT)
 485       myNeedToResolve = true;
 486
 487     // notify subscibers
 488     notify(theConstraint);
 489   }
 490   return true;
 491 }
 492
 493 void PlaneGCSSolver_Storage::removeInvalidEntities()
 494 {
 495   PlaneGCSSolver_EntityDestroyer aDestroyer;
 496
 497   // Remove invalid constraints
 498   std::list<ConstraintPtr> anInvalidConstraints;
 499   std::map<ConstraintPtr, ConstraintWrapperPtr>::const_iterator
 500       aCIter = myConstraintMap.begin();
 501   for (; aCIter != myConstraintMap.end(); ++aCIter)
 502     if (!aCIter->first->data() || !aCIter->first->data()->isValid())
 503       anInvalidConstraints.push_back(aCIter->first);
 504   std::list<ConstraintPtr>::const_iterator anInvCIt = anInvalidConstraints.begin();
 505   for (; anInvCIt != anInvalidConstraints.end(); ++anInvCIt)
 506     removeConstraint(*anInvCIt);
 507
 508   // Remove invalid features
 509   std::list<FeaturePtr> anInvalidFeatures;
 510   std::map<FeaturePtr, EntityWrapperPtr>::const_iterator aFIter = myFeatureMap.begin();
 511   for (; aFIter != myFeatureMap.end(); aFIter++)
 512     if (!aFIter->first->data() || !aFIter->first->data()->isValid()) {
 513       anInvalidFeatures.push_back(aFIter->first);
 514       if (aFIter->second)
 515         aDestroyer.remove(aFIter->second);
 516
 517       // remove invalid arc
 518       removeAuxiliaryConstraints(aFIter->second);
 519     }
 520   std::list<FeaturePtr>::const_iterator anInvFIt = anInvalidFeatures.begin();
 521   for (; anInvFIt != anInvalidFeatures.end(); ++anInvFIt)
 522     removeFeature(*anInvFIt);
 523
 524   // Remove invalid attributes
 525   std::list<AttributePtr> anInvalidAttributes;
 526   std::map<AttributePtr, EntityWrapperPtr>::const_iterator anAttrIt = myAttributeMap.begin();
 527   for (; anAttrIt != myAttributeMap.end(); ++anAttrIt) {
 528     FeaturePtr anOwner = ModelAPI_Feature::feature(anAttrIt->first->owner());
 529     if (!anOwner || !anOwner->data() || !anOwner->data()->isValid()) {
 530       anInvalidAttributes.push_back(anAttrIt->first);
 531       aDestroyer.remove(anAttrIt->second);
 532     }
 533   }
 534   std::list<AttributePtr>::const_iterator anInvAtIt = anInvalidAttributes.begin();
 535   for (; anInvAtIt != anInvalidAttributes.end(); ++anInvAtIt)
 536     removeAttribute(*anInvAtIt);
 537
 538   // free memory occupied by parameters
 539   removeParameters(aDestroyer.parametersToRemove());
 540
 541   /// TODO: Think on optimization of checking invalid features and attributes
 542 }
 543
 544
 545
 546 double* PlaneGCSSolver_Storage::createParameter()
 547 {
 548   return mySketchSolver->createParameter();
 549 }
 550
 551 void PlaneGCSSolver_Storage::removeParameters(const GCS::SET_pD& theParams)
 552 {
 553   mySketchSolver->removeParameters(theParams);
 554 }
 555
 556 // indicates attribute containing in the external feature
 557 static bool isExternalAttribute(const AttributePtr& theAttribute)
 558 {
 559   if (!theAttribute)
 560     return false;
 561   std::shared_ptr<SketchPlugin_Feature> aSketchFeature =
 562       std::dynamic_pointer_cast<SketchPlugin_Feature>(theAttribute->owner());
 563   return aSketchFeature.get() && aSketchFeature->isExternal();
 564 }
 565
 566 static void addOwnerToSet(const AttributePtr& theAttribute, std::set<FeaturePtr>& theFeatures)
 567 {
 568   FeaturePtr anOwner = ModelAPI_Feature::feature(theAttribute->owner());
 569   if (anOwner)
 570     theFeatures.insert(anOwner);
 571 }
 572
 573 void PlaneGCSSolver_Storage::refresh() const
 574 {
 575   const double aTol = 1000. * tolerance; // tolerance to prevent frequent updates
 576
 577   std::set<FeaturePtr> anUpdatedFeatures;
 578
 579   std::map<AttributePtr, EntityWrapperPtr>::const_iterator anIt = myAttributeMap.begin();
 580   for (; anIt != myAttributeMap.end(); ++anIt) {
 581     if (!anIt->first->isInitialized())
 582       continue;
 583
 584     // the external feature always should keep the up to date values, so,
 585     // refresh from the solver is never needed
 586     if (isExternalAttribute(anIt->first))
 587       continue;
 588
 589     std::shared_ptr<GeomDataAPI_Point2D> aPoint2D =
 590         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(anIt->first);
 591     if (aPoint2D) {
 592       std::shared_ptr<PlaneGCSSolver_PointWrapper> aPointWrapper =
 593           std::dynamic_pointer_cast<PlaneGCSSolver_PointWrapper>(anIt->second);
 594       GCSPointPtr aGCSPoint = aPointWrapper->point();
 595       if (fabs(aPoint2D->x() - (*aGCSPoint->x)) > aTol ||
 596           fabs(aPoint2D->y() - (*aGCSPoint->y)) > aTol) {
 597         aPoint2D->setValue(*aGCSPoint->x, *aGCSPoint->y);
 598         addOwnerToSet(anIt->first, anUpdatedFeatures);
 599       }
 600       continue;
 601     }
 602     AttributeDoublePtr aScalar = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(anIt->first);
 603     if (aScalar) {
 604       ScalarWrapperPtr aScalarWrapper =
 605           std::dynamic_pointer_cast<PlaneGCSSolver_ScalarWrapper>(anIt->second);
 606       if (fabs(aScalar->value() - aScalarWrapper->value()) > aTol) {
 607         aScalar->setValue(aScalarWrapper->value());
 608         addOwnerToSet(anIt->first, anUpdatedFeatures);
 609       }
 610       continue;
 611     }
 612   }
 613
 614   // notify listeners about features update
 615   std::set<FeaturePtr>::const_iterator aFIt = anUpdatedFeatures.begin();
 616   for (; aFIt != anUpdatedFeatures.end(); ++aFIt)
 617     notify(*aFIt);
 618 }
 619
 620 PlaneGCSSolver_Solver::SolveStatus PlaneGCSSolver_Storage::checkDegeneratedGeometry() const
 621 {
 622   std::map<FeaturePtr, EntityWrapperPtr>::const_iterator aFIt = myFeatureMap.begin();
 623   for (; aFIt != myFeatureMap.end(); ++aFIt) {
 624     EdgeWrapperPtr anEdge = std::dynamic_pointer_cast<PlaneGCSSolver_EdgeWrapper>(aFIt->second);
 625     if (anEdge && anEdge->isDegenerated())
 626       return PlaneGCSSolver_Solver::STATUS_DEGENERATED;
 627   }
 628   return PlaneGCSSolver_Solver::STATUS_OK;
 629 }