src/SketchPlugin/SketchPlugin_Arc.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D -->
   2
   3 // File:        SketchPlugin_Arc.cpp
   4 // Created:     26 Apr 2014
   5 // Author:      Artem ZHIDKOV
   6
   7 #include "SketchPlugin_Arc.h"
   8 #include "SketchPlugin_Sketch.h"
   9 #include <SketchPlugin_ConstraintCoincidence.h>
  10 #include <SketchPlugin_ConstraintTangent.h>
  11
  12 #include <Events_Loop.h>
  13 #include <ModelAPI_Data.h>
  14 #include <ModelAPI_ResultConstruction.h>
  15 #include <ModelAPI_AttributeDouble.h>
  16 #include <ModelAPI_AttributeRefAttr.h>
  17 #include <ModelAPI_AttributeSelection.h>
  18 #include <ModelAPI_AttributeString.h>
  19 #include <ModelAPI_Events.h>
  20 #include <ModelAPI_Validator.h>
  21 #include <ModelAPI_Session.h>
  22 #include <ModelAPI_Tools.h>
  23
  24 #include <GeomAPI_Ax2.h>
  25 #include <GeomAPI_Circ2d.h>
  26 #include <GeomAPI_Circ.h>
  27 #include <GeomAPI_Dir2d.h>
  28 #include <GeomAPI_Dir.h>
  29 #include <GeomAPI_Lin2d.h>
  30 #include <GeomAPI_Lin.h>
  31 #include <GeomAPI_Pnt2d.h>
  32 #include <GeomAPI_Vertex.h>
  33 #include <GeomAPI_XY.h>
  34 #include <GeomDataAPI_Point2D.h>
  35 #include <GeomDataAPI_Dir.h>
  36 #include <GeomAlgoAPI_PointBuilder.h>
  37 #include <GeomAlgoAPI_EdgeBuilder.h>
  38 #include <GeomAlgoAPI_CompoundBuilder.h>
  39 // for sqrt on Linux
  40 #include <math.h>
  41
  42 const double tolerance = 1e-7;
  43 const double paramTolerance = 1.e-4;
  44 const double PI = 3.141592653589793238463;
  45
  46 namespace {
  47   static const std::string& POINT_ID(int theIndex)
  48   {
  49     switch (theIndex) {
  50     case 1: return SketchPlugin_Arc::START_ID();
  51     case 2: return SketchPlugin_Arc::END_ID();
  52     case 3: return SketchPlugin_Arc::PASSED_POINT_ID();
  53     }
  54
  55     static const std::string DUMMY;
  56     return DUMMY;
  57   }
  58 }
  59
  60
  61
  62 SketchPlugin_Arc::SketchPlugin_Arc()
  63     : SketchPlugin_SketchEntity()
  64 {
  65   myStartUpdate = false;
  66   myEndUpdate = false;
  67   // default values
  68   myXEndBefore = 0;
  69   myYEndBefore = 0;
  70
  71   myParamBefore = PI * 2.0;
  72 }
  73
  74 void SketchPlugin_Arc::initDerivedClassAttributes()
  75 {
  76   data()->addAttribute(CENTER_ID(), GeomDataAPI_Point2D::typeId());
  77   data()->addAttribute(START_ID(), GeomDataAPI_Point2D::typeId());
  78   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
  79     GeomDataAPI_Point2D>(data()->addAttribute(END_ID(), GeomDataAPI_Point2D::typeId()));
  80   data()->addAttribute(EXTERNAL_ID(), ModelAPI_AttributeSelection::typeId());
  81   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), EXTERNAL_ID());
  82
  83   AttributeBooleanPtr isInversed = std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(
  84     data()->addAttribute(INVERSED_ID(), ModelAPI_AttributeBoolean::typeId()));
  85
  86   // get the initial values
  87   if (anEndAttr->isInitialized()) {
  88     myXEndBefore = anEndAttr->x();
  89     myYEndBefore = anEndAttr->y();
  90   }
  91
  92   AttributeStringPtr anArcType = std::dynamic_pointer_cast<ModelAPI_AttributeString>(
  93     data()->addAttribute(ARC_TYPE(), ModelAPI_AttributeString::typeId()));
  94
  95   data()->addAttribute(PASSED_POINT_ID(), GeomDataAPI_Point2D::typeId());
  96   data()->addAttribute(TANGENT_POINT_ID(), ModelAPI_AttributeRefAttr::typeId());
  97   data()->addAttribute(RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
  98   data()->addAttribute(ANGLE_ID(), ModelAPI_AttributeDouble::typeId());
  99
 100   // set after all to avoid in attributeChanged reference to not existing attributes
 101   if (!isInversed->isInitialized())
 102     isInversed->setValue(false);
 103   anArcType->setValue(ARC_TYPE_CENTER_START_END());
 104 }
 105
 106 void SketchPlugin_Arc::execute()
 107 {
 108   SketchPlugin_Sketch* aSketch = sketch();
 109   // result for the arc is set only when all obligatory attributes are initialized,
 110   // otherwise AIS object is used to visualize the arc's preview
 111   if (aSketch && isFeatureValid()) {
 112     bool hasResult = lastResult().get() != NULL;
 113
 114     // compute a circle point in 3D view
 115     std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 116         GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 117     // compute the arc start point
 118     std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 119         GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 120
 121     std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 122     // make a visible point
 123     std::shared_ptr<GeomAPI_Shape> aCenterPointShape = GeomAlgoAPI_PointBuilder::vertex(aCenter);
 124     std::shared_ptr<ModelAPI_ResultConstruction> aConstr1 = document()->createConstruction(
 125         data(), 0);
 126     aConstr1->setShape(aCenterPointShape);
 127     aConstr1->setIsInHistory(false);
 128     setResult(aConstr1, 0);
 129
 130     // make a visible circle
 131     std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 132         aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
 133     std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
 134     std::shared_ptr<GeomAPI_Pnt> aStartPoint(aSketch->to3D(aStartAttr->x(), aStartAttr->y()));
 135
 136     // compute and change the arc end point
 137     std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 138         GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 139     std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(
 140         new GeomAPI_Circ2d(aCenterAttr->pnt(), aStartAttr->pnt()));
 141     std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEndAttr->pnt());
 142     if (aProjection && anEndAttr->pnt()->distance(aProjection) > tolerance)
 143       anEndAttr->setValue(aProjection);
 144     std::shared_ptr<GeomAPI_Pnt> aEndPoint(aSketch->to3D(anEndAttr->x(), anEndAttr->y()));
 145     AttributeBooleanPtr isInversed =
 146         std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 147
 148     // compute end parameter
 149     aCircleForArc->parameter(anEndAttr->pnt(), paramTolerance, myParamBefore);
 150
 151     std::shared_ptr<GeomAPI_Shape> aCircleShape;
 152     if(!isInversed->value()) {
 153       aCircleShape =
 154         GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStartPoint, aEndPoint, aNormal);
 155     } else {
 156       aCircleShape =
 157         GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aEndPoint, aStartPoint, aNormal);
 158     }
 159
 160     if (aCircleShape) {
 161       std::shared_ptr<ModelAPI_ResultConstruction> aConstr2 = document()->createConstruction(
 162           data(), 1);
 163       aConstr2->setShape(aCircleShape);
 164       aConstr2->setIsInHistory(false);
 165       setResult(aConstr2, 1);
 166     }
 167
 168     if (!hasResult && string(ARC_TYPE())->value() == ARC_TYPE_TANGENT()) {
 169       // constraints for tangent arc have not been prepared yet, do them
 170       tangencyArcConstraints();
 171     }
 172   }
 173 }
 174
 175 AISObjectPtr SketchPlugin_Arc::getAISObject(AISObjectPtr thePrevious)
 176 {
 177   SketchPlugin_Sketch* aSketch = sketch();
 178   if (aSketch) {
 179     // if the feature is valid, the execute() method should be performed, AIS object is empty
 180     if (!isFeatureValid()) {
 181       // compute a circle point in 3D view
 182       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 183           GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 184
 185       std::list<std::shared_ptr<GeomAPI_Shape> > aShapes;
 186       if (aCenterAttr->isInitialized()) {
 187         std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 188
 189         std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 190             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 191         std::shared_ptr<GeomDataAPI_Point2D> aEndAttr = std::dynamic_pointer_cast<
 192             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 193         AttributeStringPtr aTypeAttr = std::dynamic_pointer_cast<ModelAPI_AttributeString>(
 194             data()->attribute(ARC_TYPE()));
 195
 196         if (aStartAttr->isInitialized()) {
 197           // make a visible circle
 198           std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 199               aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
 200           bool aHasPlane = aNDir && !(aNDir->x() == 0 && aNDir->y() == 0 && aNDir->z() == 0);
 201           if (aHasPlane) {
 202             std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
 203             std::shared_ptr<GeomAPI_Pnt>
 204               aStartPoint(aSketch->to3D(aStartAttr->x(), aStartAttr->y()));
 205             std::shared_ptr<GeomAPI_Pnt> aEndPoint = aStartPoint;
 206             if (aTypeAttr && aTypeAttr->isInitialized() &&
 207                 aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) {
 208               if (aEndAttr->isInitialized() && //
 209                   aEndAttr->pnt()->distance(aStartAttr->pnt()) > tolerance) {
 210                 aEndPoint = aSketch->to3D(aEndAttr->x(), aEndAttr->y());
 211                 std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 212                   std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 213                   data()->attribute(PASSED_POINT_ID()));
 214                 if (!aPassedAttr->isInitialized()) {
 215                   // calculate the appropriate center for the presentation
 216                   // check that center is bad for the current start and end and must be recomputed
 217                   std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(new GeomAPI_Circ2d(
 218                     aCenterAttr->pnt(), aStartAttr->pnt()));
 219                   std::shared_ptr<GeomAPI_Pnt2d> aProjection =
 220                     aCircleForArc->project(aEndAttr->pnt());
 221                   if (!aProjection.get() || aEndAttr->pnt()->distance(aProjection) > tolerance) {
 222                     std::shared_ptr<GeomAPI_XY> aDir =
 223                       aEndAttr->pnt()->xy()->decreased(aStartAttr->pnt()->xy())->multiplied(0.5);
 224                     double x = aDir->x();
 225                     double y = aDir->y();
 226                     aDir->setX(x - y);
 227                     aDir->setY(y + x);
 228                     std::shared_ptr<GeomAPI_XY> aCenterXY = aStartAttr->pnt()->xy()->added(aDir);
 229                     aCenter = aSketch->to3D(aCenterXY->x(), aCenterXY->y());
 230                   }
 231                 }
 232               } else { // issue #1695: don't display circle if initialized only start point
 233                 return AISObjectPtr();
 234               }
 235             }
 236             AttributeBooleanPtr isInversed =
 237               std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 238
 239             std::shared_ptr<GeomAPI_Shape> aCircleShape =
 240               (isInversed->isInitialized() && isInversed->value()) ?
 241                 GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aEndPoint, aStartPoint, aNormal) :
 242                 GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStartPoint, aEndPoint, aNormal);
 243
 244             if (aCircleShape)
 245               aShapes.push_back(aCircleShape);
 246           }
 247         }
 248         // make a visible point
 249         std::shared_ptr<GeomAPI_Shape> aCenterPointShape =
 250           GeomAlgoAPI_PointBuilder::vertex(aCenter);
 251         aShapes.push_back(aCenterPointShape);
 252       }
 253       if (!aShapes.empty()) {
 254         std::shared_ptr<GeomAPI_Shape> aCompound = GeomAlgoAPI_CompoundBuilder::compound(aShapes);
 255         AISObjectPtr anAIS = thePrevious;
 256         if (!anAIS)
 257           anAIS = AISObjectPtr(new GeomAPI_AISObject);
 258         anAIS->createShape(aCompound);
 259         double aDeflection = Config_PropManager::real("Visualization", "construction_deflection",
 260                                              ModelAPI_ResultConstruction::DEFAULT_DEFLECTION());
 261         anAIS->setDeflection(aDeflection);
 262         anAIS->setWidth(3);
 263         return anAIS;
 264       }
 265     }
 266   }
 267   return AISObjectPtr();
 268 }
 269
 270 void SketchPlugin_Arc::move(double theDeltaX, double theDeltaY)
 271 {
 272   std::shared_ptr<ModelAPI_Data> aData = data();
 273   if (!aData->isValid())
 274     return;
 275
 276   bool aWasBlocked = aData->blockSendAttributeUpdated(true);
 277
 278   myStartUpdate = true;
 279   myEndUpdate = true;
 280   std::shared_ptr<GeomDataAPI_Point2D> aPoint2 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 281       aData->attribute(SketchPlugin_Arc::START_ID()));
 282   if (aPoint2->isInitialized())
 283     aPoint2->move(theDeltaX, theDeltaY);
 284
 285   std::shared_ptr<GeomDataAPI_Point2D> aPoint3 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 286       aData->attribute(SketchPlugin_Arc::END_ID()));
 287   if (aPoint3->isInitialized())
 288     aPoint3->move(theDeltaX, theDeltaY);
 289   myStartUpdate = false;
 290   myEndUpdate = false;
 291
 292   std::shared_ptr<GeomDataAPI_Point2D> aPoint1 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 293       aData->attribute(SketchPlugin_Arc::CENTER_ID()));
 294   if (aPoint1->isInitialized())
 295     aPoint1->move(theDeltaX, theDeltaY);
 296
 297   std::shared_ptr<GeomDataAPI_Point2D> aPassedPoint =
 298       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aData->attribute(PASSED_POINT_ID()));
 299   if (aPassedPoint->isInitialized())
 300     aPassedPoint->move(theDeltaX, theDeltaY);
 301   aData->blockSendAttributeUpdated(aWasBlocked);
 302 }
 303
 304 bool SketchPlugin_Arc::isFixed() {
 305   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
 306 }
 307
 308 bool SketchPlugin_Arc::isFeatureValid()
 309 {
 310   AttributeStringPtr anArcTypeAttr =
 311       std::dynamic_pointer_cast<ModelAPI_AttributeString>(data()->attribute(ARC_TYPE()));
 312   if (!anArcTypeAttr)
 313     return false;
 314   std::string anArcType = anArcTypeAttr->value();
 315
 316   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 317       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::CENTER_ID()));
 318   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 319       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 320   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 321       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 322   std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr = std::dynamic_pointer_cast<
 323       GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 324
 325   bool isValid = false;
 326   if (anArcType == ARC_TYPE_THREE_POINTS())
 327     isValid = aStartAttr->isInitialized() &&
 328       anEndAttr->isInitialized() && aPassedAttr->isInitialized();
 329   else
 330     isValid = aCenterAttr->isInitialized() &&
 331       aStartAttr->isInitialized() && anEndAttr->isInitialized();
 332
 333   return isValid;
 334 }
 335
 336 static inline void adjustPeriod(double& theParam)
 337 {
 338   static const double PERIOD = 2.0 * PI;
 339   while (theParam < 0.0) theParam += PERIOD;
 340   while (theParam >= PERIOD) theParam -= PERIOD;
 341 }
 342
 343 void SketchPlugin_Arc::attributeChanged(const std::string& theID)
 344 {
 345   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 346       GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 347   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 348       GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 349   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 350       GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 351   // the second condition for unability to move external segments anywhere
 352   if (theID == EXTERNAL_ID() || isFixed()) {
 353     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
 354     if (!aSelection) {
 355       // empty shape in selection shows that the shape is equal to context
 356       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
 357       if (anExtRes)
 358         aSelection = anExtRes->shape();
 359     }
 360     // update arguments due to the selection value
 361     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 362       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 363       std::shared_ptr<GeomAPI_Circ> aCirc = anEdge->circle();
 364       if (aCirc.get()) {
 365         aStartAttr->setValue(sketch()->to2D(anEdge->firstPoint()));
 366         anEndAttr->setValue(sketch()->to2D(anEdge->lastPoint()));
 367         aCenterAttr->setValue(sketch()->to2D(aCirc->center()));
 368
 369         data()->real(RADIUS_ID())->setValue(aCirc->radius());
 370         double aStartAngle, aEndAngle;
 371         anEdge->getRange(aStartAngle, aEndAngle);
 372         data()->real(ANGLE_ID())->setValue(aEndAngle - aStartAngle);
 373         myParamBefore = aEndAngle;
 374         adjustPeriod(myParamBefore);
 375       }
 376     }
 377     return;
 378   }
 379   AttributeStringPtr aTypeAttr =
 380       std::dynamic_pointer_cast<ModelAPI_AttributeString>(attribute(ARC_TYPE()));
 381
 382   // this is before others since here end attribute may be changed, but with the special behavior
 383   if (aTypeAttr->value() == ARC_TYPE_TANGENT() &&
 384      (theID == TANGENT_POINT_ID() || theID == END_ID())) {
 385     SketchPlugin_Sketch* aSketch = sketch();
 386     AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 387         data()->attribute(TANGENT_POINT_ID()));
 388
 389     if (aTangPtAttr->isInitialized() && anEndAttr->isInitialized()) {
 390       // compute orthogonal direction
 391       std::shared_ptr<GeomAPI_Dir2d> anOrthoDir;
 392       std::shared_ptr<GeomDataAPI_Point2D> aTangentPoint =
 393           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aTangPtAttr->attr());
 394       std::shared_ptr<GeomAPI_Pnt2d> aTangPnt2d = aTangentPoint->pnt();
 395       if (aTangPnt2d->isEqual(anEndAttr->pnt()))
 396         return;
 397       FeaturePtr aTangFeature = ModelAPI_Feature::feature(aTangentPoint->owner());
 398       std::shared_ptr<GeomAPI_Edge> aTangEdge = std::dynamic_pointer_cast<GeomAPI_Edge>(
 399           aTangFeature->lastResult()->shape());
 400       if (aTangEdge->isLine()) {
 401         std::shared_ptr<GeomAPI_Dir> aDir = aTangEdge->line()->direction();
 402         std::shared_ptr<GeomAPI_Pnt> aPnt(new GeomAPI_Pnt(aDir->x(), aDir->y(), aDir->z()));
 403         std::shared_ptr<GeomAPI_Pnt2d> aPnt2d = aSketch->to2D(aPnt);
 404         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(-aPnt2d->y(), aPnt2d->x()));
 405       }
 406       else if (aTangEdge->isArc()) {
 407         std::shared_ptr<GeomAPI_Pnt> aCenter = aTangEdge->circle()->center();
 408         std::shared_ptr<GeomAPI_Pnt2d> aCenter2d = aSketch->to2D(aCenter);
 409         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(
 410             new GeomAPI_Dir2d(aTangPnt2d->xy()->decreased(aCenter2d->xy())));
 411       }
 412
 413       // compute parameters of the middle perpendicular
 414       std::shared_ptr<GeomAPI_XY> aEndPntCoord = anEndAttr->pnt()->xy();
 415       std::shared_ptr<GeomAPI_XY> aTempDir = aEndPntCoord->decreased(aTangPnt2d->xy());
 416       std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(-aTempDir->y(), aTempDir->x()));
 417       std::shared_ptr<GeomAPI_Pnt2d> aMidPnt(
 418           new GeomAPI_Pnt2d(aEndPntCoord->added(aTangPnt2d->xy())->multiplied(0.5)));
 419
 420       // compute center of arc by calculating intersection of
 421       // orthogonal line and middle perpendicular
 422       std::shared_ptr<GeomAPI_Lin2d> anOrthoLine(new GeomAPI_Lin2d(aTangPnt2d, anOrthoDir));
 423       std::shared_ptr<GeomAPI_Lin2d> aMiddleLine(new GeomAPI_Lin2d(aMidPnt, aMidDir));
 424       std::shared_ptr<GeomAPI_Pnt2d> aCenter = anOrthoLine->intersect(aMiddleLine);
 425       if (aCenter) {
 426         bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 427         aCenterAttr->setValue(aCenter);
 428         aStartAttr->setValue(aTangPnt2d);
 429         data()->blockSendAttributeUpdated(aWasBlocked);
 430       }
 431
 432       tangencyArcConstraints();
 433     }
 434     return;
 435   }
 436
 437   // if changed the base attributes, update all other (is necessary) without recursion
 438   if (theID == CENTER_ID() || theID == START_ID() || theID == END_ID() || theID == ARC_TYPE()) {
 439     if (!isFeatureValid())
 440       return;
 441     std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
 442     std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
 443     std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
 444     double aRadius = aCenter->distance(aStart);
 445     if (aRadius < tolerance)
 446       return;
 447     std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(new GeomAPI_Circ2d(aCenter, aStart));
 448
 449     bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 450     // The Arc end point is projected
 451     // on the circle formed by center and start points
 452     std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEnd);
 453     if (aProjection && anEnd->distance(aProjection) > tolerance) {
 454       anEndAttr->setValue(aProjection);
 455       anEnd = aProjection;
 456     }
 457     // update all other attributes due to the base attributes values
 458     if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) {
 459       // update passed point due to start, end and center
 460       if (aCenter->distance(aStart) > tolerance && aCenter->distance(anEnd) > tolerance) {
 461         // project passed point t othe circle
 462         std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 463           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 464         if (aPassedAttr->isInitialized()) {
 465           std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(aPassedAttr->pnt());
 466           if (aProjection && aPassedAttr->pnt()->distance(aProjection) > tolerance) {
 467             aPassedAttr->setValue(aProjection);
 468           }
 469         } else { // initialize it by some middle - value
 470           std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(
 471             aStart->xy()->decreased(aCenter->xy())));
 472           std::shared_ptr<GeomAPI_Dir2d> aEndDir(new GeomAPI_Dir2d(
 473             anEnd->xy()->decreased(aCenter->xy())));
 474           std::shared_ptr<GeomAPI_XY> aMidDirXY = aStartDir->xy()->added(aEndDir->xy());
 475           if (aMidDirXY->dot(aMidDirXY) < tolerance * tolerance) {
 476             // start and end directions are opposite, so middle direction will be orthogonal
 477             aMidDirXY->setX(-aStartDir->y());
 478             aMidDirXY->setY(aStartDir->x());
 479           }
 480           std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(aMidDirXY));
 481           if ((aStartDir->cross(aMidDir) > 0) ^ !isReversed())
 482             aMidDir->reverse();
 483           std::shared_ptr<GeomAPI_XY> aPassedPnt =
 484             aCenter->xy()->added(aMidDir->xy()->multiplied(aCenter->distance(aStart)));
 485           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()))->
 486             setValue(aPassedPnt->x(), aPassedPnt->y());
 487         }
 488       }
 489     }
 490     // update radius and angle
 491     AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 492         data()->attribute(RADIUS_ID()));
 493     aRadiusAttr->setValue(aRadius);
 494     AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 495         data()->attribute(ANGLE_ID()));
 496     std::shared_ptr<GeomAPI_Circ2d> aCircle(new GeomAPI_Circ2d(aCenter, aStart));
 497     double aStartParam, aEndParam;
 498     aCircle->parameter(aStart, paramTolerance, aStartParam);
 499     aCircle->parameter(anEnd, paramTolerance, aEndParam);
 500     adjustPeriod(aStartParam);
 501     adjustPeriod(aEndParam);
 502     // use the passed point for the angle calculation
 503     if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) {
 504       std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 505         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 506       double aPassedParam;
 507       aCircle->parameter(aPassedAttr->pnt(), paramTolerance, aPassedParam);
 508       adjustPeriod(aPassedParam);
 509       double aNewAngle = aPassedParam >= aStartParam && aPassedParam <= aEndParam ?
 510         ((aEndParam - aStartParam) * 180.0 / PI) :
 511         ((aEndParam - aStartParam - 2.0 * PI) * 180.0 / PI);
 512       if (!anAngleAttr->isInitialized() || fabs(aNewAngle - anAngleAttr->value()) > tolerance)
 513         anAngleAttr->setValue(aNewAngle);
 514     } else {
 515       double aNewAngle = (aEndParam - aStartParam) * 180.0 / PI;
 516       if (!anAngleAttr->isInitialized() || fabs(aNewAngle - anAngleAttr->value()) > tolerance)
 517         anAngleAttr->setValue(aNewAngle);
 518     }
 519
 520     // calculate arc aperture and change the Inversed flag if needed
 521     AttributeBooleanPtr isInversed =
 522         std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 523     double aParameterNew = aEndParam - aStartParam;
 524     if (((0 <= myParamBefore && myParamBefore <= PI / 2.0) || myParamBefore == PI * 2.0) &&
 525         PI * 1.5 <= aParameterNew && aParameterNew <= PI * 2.0)
 526       isInversed->setValue(true);
 527     else if (PI * 1.5 <= myParamBefore && myParamBefore <= PI * 2.0 &&
 528              0 <= aParameterNew && aParameterNew <= PI / 2.0)
 529       isInversed->setValue(false);
 530     myParamBefore = aParameterNew;
 531
 532     // do not need to inform that other parameters were changed in this basis mode: these arguments
 533     // change is enough
 534     data()->blockSendAttributeUpdated(aWasBlocked, false);
 535     return;
 536   }
 537
 538   if (theID == PASSED_POINT_ID()) {
 539     bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 540
 541     std::shared_ptr<GeomAPI_Pnt2d> aPoints[3];
 542     int aNbInitialized = 0;
 543     for (int i = 1; i <= 3; ++i) {
 544       std::shared_ptr<GeomDataAPI_Point2D> aCurPnt =
 545           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(POINT_ID(i)));
 546       if (aCurPnt->isInitialized())
 547         aPoints[aNbInitialized++] = aCurPnt->pnt();
 548     }
 549
 550     if (aNbInitialized == 3) {
 551       std::shared_ptr<GeomAPI_Circ2d> aCircle(
 552           new GeomAPI_Circ2d(aPoints[0], aPoints[1], aPoints[2]));
 553
 554       std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCircle->center();
 555       if (aCenter) {
 556         aCenterAttr->setValue(aCenter);
 557       }
 558     }
 559     data()->blockSendAttributeUpdated(aWasBlocked);
 560     return;
 561   }
 562
 563   if (theID == RADIUS_ID()) {
 564     if (!aStartAttr->isInitialized() || !anEndAttr->isInitialized() ||
 565         !aCenterAttr->isInitialized())
 566       return;
 567     // move center and passed point
 568     std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
 569     std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
 570     std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
 571     if (aStart->distance(aCenter) < tolerance || anEnd->distance(aCenter) < tolerance)
 572       return;
 573     AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 574         data()->attribute(RADIUS_ID()));
 575     double aRadius = aRadiusAttr->value();
 576
 577     bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 578     std::shared_ptr<GeomAPI_Dir2d>
 579       aStartDir(new GeomAPI_Dir2d(aStart->xy()->decreased(aCenter->xy())));
 580     std::shared_ptr<GeomAPI_XY>
 581       aNewStart = aStartDir->xy()->multiplied(aRadius)->added(aCenter->xy());
 582     aStartAttr->setValue(aNewStart->x(), aNewStart->y());
 583     std::shared_ptr<GeomAPI_Dir2d>
 584       anEndDir(new GeomAPI_Dir2d(anEnd->xy()->decreased(aCenter->xy())));
 585     std::shared_ptr<GeomAPI_XY>
 586       aNewEnd = anEndDir->xy()->multiplied(aRadius)->added(aCenter->xy());
 587     anEndAttr->setValue(aNewEnd->x(), aNewEnd->y());
 588     data()->blockSendAttributeUpdated(aWasBlocked);
 589     return;
 590   }
 591   if (theID == ANGLE_ID()) {
 592     if (!aStartAttr->isInitialized() || !aCenterAttr->isInitialized())
 593       return;
 594     AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 595         data()->attribute(ANGLE_ID()));
 596     bool aWasBlocked = data()->blockSendAttributeUpdated(true);
 597     // move end point and passed point
 598     std::shared_ptr<GeomAPI_XY> aCenter = aCenterAttr->pnt()->xy();
 599     double anAngle = anAngleAttr->value() * PI / 180.0;
 600     double sinA = sin(anAngle);
 601     double cosA = cos(anAngle);
 602     std::shared_ptr<GeomAPI_XY> aStartDir = aStartAttr->pnt()->xy()->decreased(aCenter);
 603     std::shared_ptr<GeomAPI_XY> aDir(new GeomAPI_XY(
 604         aStartDir->x() * cosA - aStartDir->y() * sinA,
 605         aStartDir->x() * sinA + aStartDir->y() * cosA));
 606     anEndAttr->setValue(aCenter->x() + aDir->x(), aCenter->y() + aDir->y());
 607     data()->blockSendAttributeUpdated(aWasBlocked);
 608     return;
 609   }
 610 }
 611
 612 void SketchPlugin_Arc::setReversed(bool isReversed)
 613 {
 614   std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(
 615     attribute(INVERSED_ID()))->setValue(isReversed);
 616   myParamBefore = 0.0;
 617 }
 618
 619 bool SketchPlugin_Arc::isReversed()
 620 {
 621   return std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()))->value();
 622 }
 623
 624 void SketchPlugin_Arc::tangencyArcConstraints()
 625 {
 626   if (!lastResult())
 627     return;
 628
 629   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr =
 630       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(START_ID()));
 631   AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 632       attribute(TANGENT_POINT_ID()));
 633   if (!aTangPtAttr->attr())
 634     return;
 635
 636   FeaturePtr aFeature = ModelAPI_Feature::feature(aStartAttr->owner());
 637   ObjectPtr aThisArc = aFeature->lastResult();
 638   aFeature = ModelAPI_Feature::feature(aTangPtAttr->attr()->owner());
 639   ObjectPtr aTangFeature = aFeature->lastResult();
 640
 641   // trying to find constraints to fix the tangency of the arc
 642   std::set<FeaturePtr> aCoincidence;
 643   std::set<FeaturePtr> aTangency;
 644
 645   AttributeRefAttrPtr aRefAttrA, aRefAttrB;
 646   std::set<AttributePtr> aRefs = data()->refsToMe();
 647   const std::set<AttributePtr>& aRefsToResult = lastResult()->data()->refsToMe();
 648   aRefs.insert(aRefsToResult.begin(), aRefsToResult.end());
 649   std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin();
 650   for (; aRefIt != aRefs.end(); ++aRefIt) {
 651     FeaturePtr aConstrFeature = ModelAPI_Feature::feature((*aRefIt)->owner());
 652     if (aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 653       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 654           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 655       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 656           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 657       if ((aRefAttrA && aRefAttrA->attr() == aStartAttr) ||
 658           (aRefAttrB && aRefAttrB->attr() == aStartAttr))
 659         aCoincidence.insert(aConstrFeature);
 660     }
 661     else if (aConstrFeature->getKind() == SketchPlugin_ConstraintTangent::ID()) {
 662       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 663           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 664       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 665           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 666       if ((aRefAttrA && aRefAttrA->object() == aThisArc) ||
 667           (aRefAttrB && aRefAttrB->object() == aThisArc))
 668         aTangency.insert(aConstrFeature);
 669     }
 670   }
 671   // search applicable pair of constraints
 672   bool isFound = false;
 673   FeaturePtr aPrevCoincidence, aPrevTangency;
 674   std::set<FeaturePtr>::const_iterator aCIt, aTIt;
 675   for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end() && !isFound; ++aCIt) {
 676     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 677         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 678     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 679         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 680     AttributePtr anOtherPoint =
 681         aRefAttrA->attr() == aStartAttr ? aRefAttrB->attr() : aRefAttrA->attr();
 682     for (aTIt = aTangency.begin(); aTIt != aTangency.end() && !isFound; ++aTIt) {
 683       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 684           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 685       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 686           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 687       ObjectPtr anOtherObject = aRefAttrA->object() == aThisArc ?
 688           aRefAttrB->object() : aRefAttrA->object();
 689       FeaturePtr anOtherFeature = ModelAPI_Feature::feature(anOtherObject);
 690       if (anOtherPoint->owner() == anOtherFeature) {
 691         isFound = true;
 692         aPrevCoincidence = *aCIt;
 693         aPrevTangency = *aTIt;
 694       }
 695     }
 696   }
 697
 698   if (isFound) {
 699     // update previous constraints
 700     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 701         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_A()));
 702     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 703         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_B()));
 704     if (aRefAttrA->attr() == aStartAttr)
 705       aRefAttrB->setAttr(aTangPtAttr->attr());
 706     else
 707       aRefAttrA->setAttr(aTangPtAttr->attr());
 708
 709     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 710         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_A()));
 711     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 712         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_B()));
 713     if (aRefAttrA->object() == aThisArc)
 714       aRefAttrB->setObject(aTangFeature);
 715     else
 716       aRefAttrA->setObject(aTangFeature);
 717   } else {
 718     // Wait all constraints being removed, then send update events
 719     static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 720     bool isDeleteFlushed = Events_Loop::loop()->isFlushed(aDeleteEvent);
 721     if (isDeleteFlushed)
 722       Events_Loop::loop()->setFlushed(aDeleteEvent, false);
 723     // Remove all obtained constraints which use current arc, because
 724     // there is no information which of them were used to build tangency arc.
 725     DocumentPtr aDoc = sketch()->document();
 726     std::set<FeaturePtr> aFeaturesToBeRemoved;
 727     for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end(); ++aCIt)
 728       aFeaturesToBeRemoved.insert(*aCIt);
 729     for (aTIt = aTangency.begin(); aTIt != aTangency.end(); ++aTIt)
 730       aFeaturesToBeRemoved.insert(*aTIt);
 731     ModelAPI_Tools::removeFeaturesAndReferences(aFeaturesToBeRemoved);
 732     // Send events to update the sub-features by the solver.
 733     if (isDeleteFlushed)
 734       Events_Loop::loop()->setFlushed(aDeleteEvent, true);
 735     else
 736       Events_Loop::loop()->flush(aDeleteEvent);
 737
 738     // Wait all constraints being created, then send update events
 739     static Events_ID aCreateEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 740     bool isCreateFlushed = Events_Loop::loop()->isFlushed(aCreateEvent);
 741     if (isCreateFlushed)
 742       Events_Loop::loop()->setFlushed(aCreateEvent, false);
 743
 744     // Create new constraints
 745     FeaturePtr aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 746     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 747         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 748     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 749         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 750     aRefAttrA->setAttr(aStartAttr);
 751     aRefAttrB->setAttr(aTangPtAttr->attr());
 752     aConstraint->execute();
 753     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, aCreateEvent);
 754
 755     aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 756     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 757         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 758     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 759         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 760     aRefAttrA->setObject(aThisArc);
 761     aRefAttrB->setObject(aTangFeature);
 762     aConstraint->execute();
 763     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, aCreateEvent);
 764
 765     // Send events to update the sub-features by the solver.
 766     if(isCreateFlushed)
 767       Events_Loop::loop()->setFlushed(aCreateEvent, true);
 768     else
 769       Events_Loop::loop()->flush(aCreateEvent);
 770   }
 771 }