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
  23 #include <GeomAPI_Ax2.h>
  24 #include <GeomAPI_Circ2d.h>
  25 #include <GeomAPI_Circ.h>
  26 #include <GeomAPI_Dir2d.h>
  27 #include <GeomAPI_Dir.h>
  28 #include <GeomAPI_Lin2d.h>
  29 #include <GeomAPI_Lin.h>
  30 #include <GeomAPI_Pnt2d.h>
  31 #include <GeomAPI_XY.h>
  32 #include <GeomDataAPI_Point2D.h>
  33 #include <GeomDataAPI_Dir.h>
  34 #include <GeomAlgoAPI_PointBuilder.h>
  35 #include <GeomAlgoAPI_EdgeBuilder.h>
  36 #include <GeomAlgoAPI_CompoundBuilder.h>
  37 // for sqrt on Linux
  38 #include <math.h>
  39
  40 const double tolerance = 1e-7;
  41 const double paramTolerance = 1.e-4;
  42 const double PI =3.141592653589793238463;
  43
  44 namespace {
  45   static const std::string& ARC_TYPE_CENTER_START_END()
  46   {
  47     static const std::string TYPE("CenterStartEnd");
  48     return TYPE;
  49   }
  50   static const std::string& ARC_TYPE_THREE_POINTS()
  51   {
  52     static const std::string TYPE("ThreePoints");
  53     return TYPE;
  54   }
  55
  56   static const std::string& PASSED_POINT_ID()
  57   {
  58     static const std::string PASSED_PNT("ArcPassedPoint");
  59     return PASSED_PNT;
  60   }
  61   static const std::string& RADIUS_ID()
  62   {
  63     static const std::string RADIUS("ArcRadius");
  64     return RADIUS;
  65   }
  66   static const std::string& ANGLE_ID()
  67   {
  68     static const std::string ANGLE("ArcAngle");
  69     return ANGLE;
  70   }
  71
  72   static const std::string& POINT_ID(int theIndex)
  73   {
  74     switch (theIndex) {
  75     case 1: return SketchPlugin_Arc::START_ID();
  76     case 2: return SketchPlugin_Arc::END_ID();
  77     case 3: return PASSED_POINT_ID();
  78     }
  79
  80     static const std::string DUMMY;
  81     return DUMMY;
  82   }
  83 }
  84
  85
  86
  87 SketchPlugin_Arc::SketchPlugin_Arc()
  88     : SketchPlugin_SketchEntity()
  89 {
  90   myStartUpdate = false;
  91   myEndUpdate = false;
  92   // default values
  93   myXEndBefore = 0;
  94   myYEndBefore = 0;
  95
  96   myParamBefore = 0;
  97 }
  98
  99 void SketchPlugin_Arc::initDerivedClassAttributes()
 100 {
 101   data()->addAttribute(CENTER_ID(), GeomDataAPI_Point2D::typeId());
 102   data()->addAttribute(START_ID(), GeomDataAPI_Point2D::typeId());
 103   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 104     GeomDataAPI_Point2D>(data()->addAttribute(END_ID(), GeomDataAPI_Point2D::typeId()));
 105   data()->addAttribute(EXTERNAL_ID(), ModelAPI_AttributeSelection::typeId());
 106   ModelAPI_Session::get()->validators()->registerNotObligatory(getKind(), EXTERNAL_ID());
 107
 108   data()->addAttribute(INVERSED_ID(), ModelAPI_AttributeBoolean::typeId());
 109   AttributeBooleanPtr isInversed =
 110       std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 111   if (!isInversed->isInitialized())
 112     isInversed->setValue(false);
 113
 114   // get the initial values
 115   if (anEndAttr->isInitialized()) {
 116     myXEndBefore = anEndAttr->x();
 117     myYEndBefore = anEndAttr->y();
 118   }
 119
 120   data()->addAttribute(ARC_TYPE(), ModelAPI_AttributeString::typeId());
 121   std::dynamic_pointer_cast<ModelAPI_AttributeString>(
 122       data()->attribute(ARC_TYPE()))->setValue(ARC_TYPE_CENTER_START_END());
 123
 124   data()->addAttribute(PASSED_POINT_ID(), GeomDataAPI_Point2D::typeId());
 125   data()->addAttribute(TANGENT_POINT_ID(), ModelAPI_AttributeRefAttr::typeId());
 126   data()->addAttribute(RADIUS_ID(), ModelAPI_AttributeDouble::typeId());
 127   data()->addAttribute(ANGLE_ID(), ModelAPI_AttributeDouble::typeId());
 128 }
 129
 130 void SketchPlugin_Arc::execute()
 131 {
 132   SketchPlugin_Sketch* aSketch = sketch();
 133   // result for the arc is set only when all obligatory attributes are initialized,
 134   // otherwise AIS object is used to visualize the arc's preview
 135   if (aSketch && isFeatureValid()) {
 136     ResultPtr aLastResult = lastResult();
 137     bool hasResult = aLastResult && aLastResult.get();
 138
 139     // compute a circle point in 3D view
 140     std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 141         GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 142     // compute the arc start point
 143     std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 144         GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 145
 146     std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 147     // make a visible point
 148     std::shared_ptr<GeomAPI_Shape> aCenterPointShape = GeomAlgoAPI_PointBuilder::point(aCenter);
 149     std::shared_ptr<ModelAPI_ResultConstruction> aConstr1 = document()->createConstruction(
 150         data(), 0);
 151     aConstr1->setShape(aCenterPointShape);
 152     aConstr1->setIsInHistory(false);
 153     setResult(aConstr1, 0);
 154
 155     // make a visible circle
 156     std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 157         aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
 158     std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
 159     std::shared_ptr<GeomAPI_Pnt> aStartPoint(aSketch->to3D(aStartAttr->x(), aStartAttr->y()));
 160
 161     // compute and change the arc end point
 162     std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 163         GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 164     std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(
 165         new GeomAPI_Circ2d(aCenterAttr->pnt(), aStartAttr->pnt()));
 166     std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEndAttr->pnt());
 167     if (aProjection && anEndAttr->pnt()->distance(aProjection) > tolerance)
 168       anEndAttr->setValue(aProjection);
 169     std::shared_ptr<GeomAPI_Pnt> aEndPoint(aSketch->to3D(anEndAttr->x(), anEndAttr->y()));
 170     AttributeBooleanPtr isInversed =
 171         std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 172
 173     std::shared_ptr<GeomAPI_Dir> anXDir(new GeomAPI_Dir(aStartPoint->xyz()->decreased(aCenter->xyz())));
 174     std::shared_ptr<GeomAPI_Ax2> anAx2(new GeomAPI_Ax2(aCenter, aNormal, anXDir));
 175     std::shared_ptr<GeomAPI_Circ> aCirc(new GeomAPI_Circ(anAx2, aCenter->distance(aStartPoint)));
 176     double aParameterNew = 0.0;
 177     if(aCirc->parameter(aEndPoint, paramTolerance, aParameterNew)) {
 178       if(0 <= myParamBefore && myParamBefore <= PI / 2.0
 179         && PI * 1.5 <= aParameterNew && aParameterNew <= PI * 2.0) {
 180           isInversed->setValue(true);
 181       } else if(PI * 1.5 <= myParamBefore && myParamBefore <= PI * 2.0
 182         && 0 <= aParameterNew && aParameterNew <= PI / 2.0) {
 183           isInversed->setValue(false);
 184       }
 185     }
 186     myParamBefore = aParameterNew;
 187
 188     std::shared_ptr<GeomAPI_Shape> aCircleShape;
 189     if(!isInversed->value()) {
 190       aCircleShape = GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStartPoint, aEndPoint, aNormal);
 191     } else {
 192       aCircleShape = GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aEndPoint, aStartPoint, aNormal);
 193     }
 194
 195     if (aCircleShape) {
 196       std::shared_ptr<ModelAPI_ResultConstruction> aConstr2 = document()->createConstruction(
 197           data(), 1);
 198       aConstr2->setShape(aCircleShape);
 199       aConstr2->setIsInHistory(false);
 200       setResult(aConstr2, 1);
 201     }
 202
 203     // update radius and angle
 204     updateDependentAttributes();
 205   }
 206 }
 207
 208 AISObjectPtr SketchPlugin_Arc::getAISObject(AISObjectPtr thePrevious)
 209 {
 210   SketchPlugin_Sketch* aSketch = sketch();
 211   if (aSketch) {
 212     // if the feature is valid, the execute() method should be performed, AIS object is empty
 213     if (!isFeatureValid()) {
 214       // compute a circle point in 3D view
 215       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 216           GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 217
 218       std::list<std::shared_ptr<GeomAPI_Shape> > aShapes;
 219       if (aCenterAttr->isInitialized()) {
 220         std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 221         // make a visible point
 222         std::shared_ptr<GeomAPI_Shape> aCenterPointShape = GeomAlgoAPI_PointBuilder::point(aCenter);
 223         aShapes.push_back(aCenterPointShape);
 224
 225         std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 226             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 227         std::shared_ptr<GeomDataAPI_Point2D> aEndAttr = std::dynamic_pointer_cast<
 228             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 229         AttributeStringPtr aTypeAttr = std::dynamic_pointer_cast<ModelAPI_AttributeString>(
 230             data()->attribute(ARC_TYPE()));
 231
 232         if (aStartAttr->isInitialized()) {
 233           // make a visible circle
 234           std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 235               aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
 236           bool aHasPlane = aNDir && !(aNDir->x() == 0 && aNDir->y() == 0 && aNDir->z() == 0);
 237           if (aHasPlane) {
 238             std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
 239             std::shared_ptr<GeomAPI_Pnt> aStartPoint(aSketch->to3D(aStartAttr->x(), aStartAttr->y()));
 240             std::shared_ptr<GeomAPI_Pnt> aEndPoint = aStartPoint;
 241             if (aTypeAttr && aTypeAttr->isInitialized() &&
 242                 aTypeAttr->value() == ARC_TYPE_THREE_POINTS() && aEndAttr->isInitialized())
 243               aEndPoint = aSketch->to3D(aEndAttr->x(), aEndAttr->y());
 244
 245             std::shared_ptr<GeomAPI_Shape> aCircleShape = GeomAlgoAPI_EdgeBuilder::lineCircleArc(
 246                                                             aCenter, aStartPoint, aEndPoint, aNormal);
 247             if (aCircleShape)
 248               aShapes.push_back(aCircleShape);
 249           }
 250         }
 251       }
 252       if (!aShapes.empty()) {
 253         std::shared_ptr<GeomAPI_Shape> aCompound = GeomAlgoAPI_CompoundBuilder::compound(aShapes);
 254         AISObjectPtr anAIS = thePrevious;
 255         if (!anAIS)
 256           anAIS = AISObjectPtr(new GeomAPI_AISObject);
 257         anAIS->createShape(aCompound);
 258         anAIS->setWidth(3);
 259         return anAIS;
 260       }
 261     }
 262   }
 263   return AISObjectPtr();
 264 }
 265
 266 void SketchPlugin_Arc::move(double theDeltaX, double theDeltaY)
 267 {
 268   std::shared_ptr<ModelAPI_Data> aData = data();
 269   if (!aData->isValid())
 270     return;
 271
 272   aData->blockSendAttributeUpdated(true);
 273
 274   myStartUpdate = true;
 275   myEndUpdate = true;
 276   std::shared_ptr<GeomDataAPI_Point2D> aPoint2 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 277       aData->attribute(SketchPlugin_Arc::START_ID()));
 278   aPoint2->move(theDeltaX, theDeltaY);
 279
 280   std::shared_ptr<GeomDataAPI_Point2D> aPoint3 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 281       aData->attribute(SketchPlugin_Arc::END_ID()));
 282   aPoint3->move(theDeltaX, theDeltaY);
 283   myStartUpdate = false;
 284   myEndUpdate = false;
 285
 286   std::shared_ptr<GeomDataAPI_Point2D> aPoint1 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 287       aData->attribute(SketchPlugin_Arc::CENTER_ID()));
 288   aPoint1->move(theDeltaX, theDeltaY);
 289
 290   std::shared_ptr<GeomDataAPI_Point2D> aPassedPoint =
 291       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aData->attribute(PASSED_POINT_ID()));
 292   aPassedPoint->move(theDeltaX, theDeltaY);
 293   aData->blockSendAttributeUpdated(false);
 294 }
 295
 296 bool SketchPlugin_Arc::isFixed() {
 297   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
 298 }
 299
 300 bool SketchPlugin_Arc::isFeatureValid()
 301 {
 302   AttributeStringPtr anArcTypeAttr =
 303       std::dynamic_pointer_cast<ModelAPI_AttributeString>(data()->attribute(ARC_TYPE()));
 304   if (!anArcTypeAttr)
 305     return false;
 306   std::string anArcType = anArcTypeAttr->value();
 307
 308   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 309       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::CENTER_ID()));
 310   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 311       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 312   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 313       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 314   std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr = std::dynamic_pointer_cast<
 315       GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 316
 317   bool isValid = false;
 318   if (anArcType == ARC_TYPE_THREE_POINTS())
 319     isValid = aStartAttr->isInitialized() && anEndAttr->isInitialized() && aPassedAttr->isInitialized();
 320   else
 321     isValid = aCenterAttr->isInitialized() && aStartAttr->isInitialized() && anEndAttr->isInitialized();
 322
 323   return isValid;
 324 }
 325
 326 static inline void adjustPeriod(double& theParam)
 327 {
 328   static const double PERIOD = 2.0 * PI;
 329   while (theParam < 0.0) theParam += PERIOD;
 330   while (theParam >= PERIOD) theParam -= PERIOD;
 331 }
 332
 333 static inline void calculateArcAngleRadius(
 334     const std::shared_ptr<GeomAPI_Circ2d>& theCircle,
 335     const std::shared_ptr<GeomAPI_Pnt2d>& theStartPoint,
 336     const std::shared_ptr<GeomAPI_Pnt2d>& theEndPoint,
 337     const std::shared_ptr<GeomAPI_Pnt2d>& thePassedPoint,
 338     AttributeDoublePtr theAngleAttr,
 339     AttributeDoublePtr theRadiusAttr)
 340 {
 341   double aStartParam, aEndParam, aPassedParam;
 342   theCircle->parameter(theStartPoint, paramTolerance, aStartParam);
 343   theCircle->parameter(theEndPoint, paramTolerance, aEndParam);
 344   theCircle->parameter(thePassedPoint, paramTolerance, aPassedParam);
 345   adjustPeriod(aStartParam);
 346   adjustPeriod(aEndParam);
 347   adjustPeriod(aPassedParam);
 348
 349   if (aPassedParam >= aStartParam && aPassedParam <= aEndParam)
 350     theAngleAttr->setValue((aEndParam - aStartParam) * 180.0 / PI);
 351   else
 352     theAngleAttr->setValue((aEndParam - aStartParam - 2.0 * PI) * 180.0 / PI);
 353   theRadiusAttr->setValue(theCircle->radius());
 354 }
 355
 356 static inline bool calculatePassedPoint(
 357     const std::shared_ptr<GeomAPI_Pnt2d>& theCenter,
 358     const std::shared_ptr<GeomAPI_Pnt2d>& theStartPoint,
 359     const std::shared_ptr<GeomAPI_Pnt2d>& theEndPoint,
 360     bool theArcReversed,
 361     std::shared_ptr<GeomDataAPI_Point2D> thePassedPoint)
 362 {
 363   if (theCenter->distance(theStartPoint) < tolerance ||
 364       theCenter->distance(theEndPoint) < tolerance)
 365     return false;
 366
 367   std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(
 368       theStartPoint->xy()->decreased(theCenter->xy())));
 369   std::shared_ptr<GeomAPI_Dir2d> aEndDir(new GeomAPI_Dir2d(
 370       theEndPoint->xy()->decreased(theCenter->xy())));
 371   std::shared_ptr<GeomAPI_XY> aMidDirXY = aStartDir->xy()->added(aEndDir->xy());
 372   if (aMidDirXY->dot(aMidDirXY) < tolerance * tolerance) {
 373     // start and end directions are opposite, so middle direction will be orthogonal
 374     aMidDirXY->setX(-aStartDir->y());
 375     aMidDirXY->setY(aStartDir->x());
 376   }
 377   std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(aMidDirXY));
 378   if ((aStartDir->cross(aMidDir) > 0) ^ !theArcReversed)
 379     aMidDir->reverse();
 380
 381   double aRadius = theCenter->distance(theStartPoint);
 382   std::shared_ptr<GeomAPI_XY> aPassedPnt = theCenter->xy()->added( aMidDir->xy()->multiplied(aRadius) );
 383   thePassedPoint->setValue(aPassedPnt->x(), aPassedPnt->y());
 384   return true;
 385 }
 386
 387 void SketchPlugin_Arc::updateDependentAttributes()
 388 {
 389   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 390       GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 391   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 392       GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 393   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 394       GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 395   std::shared_ptr<GeomDataAPI_Point2D> aPassedPoint =
 396       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(PASSED_POINT_ID()));
 397   AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 398       data()->attribute(RADIUS_ID()));
 399   AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 400       data()->attribute(ANGLE_ID()));
 401
 402   if (!aPassedPoint)
 403     return;
 404
 405   data()->blockSendAttributeUpdated(true);
 406
 407   bool isOk = calculatePassedPoint(aCenterAttr->pnt(), aStartAttr->pnt(), anEndAttr->pnt(),
 408                        isReversed(), aPassedPoint);
 409   if (isOk && aRadiusAttr && anAngleAttr) {
 410     std::shared_ptr<GeomAPI_Circ2d> aCircle(
 411         new GeomAPI_Circ2d(aStartAttr->pnt(), anEndAttr->pnt(), aPassedPoint->pnt()));
 412     if (aCircle->implPtr<void*>())
 413       calculateArcAngleRadius(aCircle, aStartAttr->pnt(), anEndAttr->pnt(), aPassedPoint->pnt(),
 414                               anAngleAttr, aRadiusAttr);
 415   }
 416   data()->blockSendAttributeUpdated(false);
 417 }
 418
 419
 420 void SketchPlugin_Arc::attributeChanged(const std::string& theID)
 421 {
 422   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 423       GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 424   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 425       GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 426   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 427       GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 428   // the second condition for unability to move external segments anywhere
 429   if (theID == EXTERNAL_ID() || isFixed()) {
 430     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
 431     // update arguments due to the selection value
 432     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 433       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 434       std::shared_ptr<GeomAPI_Circ> aCirc = anEdge->circle();
 435       if (aCirc.get()) {
 436         aStartAttr->setValue(sketch()->to2D(anEdge->firstPoint()));
 437         anEndAttr->setValue(sketch()->to2D(anEdge->lastPoint()));
 438         aCenterAttr->setValue(sketch()->to2D(aCirc->center()));
 439       }
 440     }
 441     return;
 442   }
 443
 444   AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 445       data()->attribute(RADIUS_ID()));
 446   AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 447       data()->attribute(ANGLE_ID()));
 448
 449   if (theID == RADIUS_ID()) {
 450     if (!aStartAttr->isInitialized() || !anEndAttr->isInitialized())
 451       return;
 452     // move center and passed point
 453     std::shared_ptr<GeomAPI_XY> aStartPnt = aStartAttr->pnt()->xy();
 454     std::shared_ptr<GeomAPI_XY> aEndPnt = anEndAttr->pnt()->xy();
 455     double aDist = aStartPnt->distance(aEndPnt);
 456     if (fabs(aDist) < tolerance)
 457       return;
 458     std::shared_ptr<GeomAPI_Dir2d> aDir(new GeomAPI_Dir2d(aEndPnt->decreased(aStartPnt)));
 459     std::shared_ptr<GeomAPI_Dir2d> aMidPerpDir(new GeomAPI_Dir2d(-aDir->y(), aDir->x()));
 460     std::shared_ptr<GeomAPI_XY> aMidPnt = aStartPnt->added(aEndPnt)->multiplied(0.5);
 461
 462     double anAngle = anAngleAttr->value() * PI / 180.0;
 463     adjustPeriod(anAngle);
 464     if (anAngle > PI)
 465       aMidPerpDir->reverse();
 466
 467     double aRadius = aRadiusAttr->value();
 468     // The center is placed on a perpendicular bisector of a start-end points segment.
 469     // If the radius is smaller that necessary, start and end points are moved too.
 470     double aDist2 = aRadius * aRadius - aDist * aDist / 4.0;
 471     aDist = aDist2 > 0.0 ? sqrt(aDist2) : 0.0;
 472     // distance between middle point and start point (does not changed if the arc diameter is greater than start-end distance)
 473     aDist2 = sqrt(aRadius * aRadius - aDist * aDist);
 474
 475     std::shared_ptr<GeomAPI_XY> aCenter = aMidPnt->added(aMidPerpDir->xy()->multiplied(aDist));
 476     aStartPnt = aMidPnt->added(aDir->xy()->multiplied(-aDist2));
 477     aEndPnt = aMidPnt->added(aDir->xy()->multiplied(aDist2));
 478
 479     data()->blockSendAttributeUpdated(true);
 480     aCenterAttr->setValue(aCenter->x(), aCenter->y());
 481     aStartAttr->setValue(aStartPnt->x(), aStartPnt->y());
 482     anEndAttr->setValue(aEndPnt->x(), aEndPnt->y());
 483     updateDependentAttributes();
 484     data()->blockSendAttributeUpdated(false);
 485     return;
 486   }
 487   if (theID == ANGLE_ID()) {
 488     if (!aStartAttr->isInitialized() || !aCenterAttr->isInitialized())
 489       return;
 490     data()->blockSendAttributeUpdated(true);
 491     // move end point and passed point
 492     std::shared_ptr<GeomAPI_XY> aCenter = aCenterAttr->pnt()->xy();
 493     double anAngle = anAngleAttr->value() * PI / 180.0;
 494     double sinA = sin(anAngle);
 495     double cosA = cos(anAngle);
 496     std::shared_ptr<GeomAPI_XY> aStartDir = aStartAttr->pnt()->xy()->decreased(aCenter);
 497     std::shared_ptr<GeomAPI_XY> aDir(new GeomAPI_XY(
 498         aStartDir->x() * cosA - aStartDir->y() * sinA,
 499         aStartDir->x() * sinA + aStartDir->y() * cosA));
 500     anEndAttr->setValue(aCenter->x() + aDir->x(), aCenter->y() + aDir->y());
 501
 502     anAngle /= 2.0;
 503     sinA = sin(anAngle);
 504     cosA = cos(anAngle);
 505     aDir = std::shared_ptr<GeomAPI_XY>(new GeomAPI_XY(
 506         aStartDir->x() * cosA - aStartDir->y() * sinA,
 507         aStartDir->x() * sinA + aStartDir->y() * cosA));
 508     std::shared_ptr<GeomDataAPI_Point2D> aPassedPoint =
 509         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(PASSED_POINT_ID()));
 510     aPassedPoint->setValue(aCenter->x() + aDir->x(), aCenter->y() + aDir->y());
 511
 512     std::shared_ptr<GeomAPI_Circ2d> aCircle(
 513         new GeomAPI_Circ2d(aStartAttr->pnt(), anEndAttr->pnt(), aPassedPoint->pnt()));
 514     calculateArcAngleRadius(aCircle, aStartAttr->pnt(), anEndAttr->pnt(), aPassedPoint->pnt(),
 515                             anAngleAttr, aRadiusAttr);
 516     data()->blockSendAttributeUpdated(false);
 517     return;
 518   }
 519
 520   if (theID == CENTER_ID()) {
 521     if (isFeatureValid())
 522       projectEndPoint();
 523     return;
 524   }
 525
 526   AttributeStringPtr aTypeAttr =
 527       std::dynamic_pointer_cast<ModelAPI_AttributeString>(attribute(ARC_TYPE()));
 528   if (!aTypeAttr)
 529     return;
 530   std::string anArcType = aTypeAttr->value();
 531
 532   // update the points in accordance to the changed point changes
 533   if (anArcType == ARC_TYPE_CENTER_START_END()) {
 534     if (!isFeatureValid())
 535       return;
 536     if (theID == END_ID() && isStable()) {
 537       // The arc is under construction, so its end point projected
 538       // on the circle formed by center and start points
 539       projectEndPoint();
 540     }
 541     updateDependentAttributes();
 542   }
 543   else if (anArcType == ARC_TYPE_THREE_POINTS() &&
 544           (theID == START_ID() || theID == END_ID() || theID == PASSED_POINT_ID())) {
 545     data()->blockSendAttributeUpdated(true);
 546
 547     std::shared_ptr<GeomAPI_Pnt2d> aPoints[3];
 548     int aNbInitialized = 0;
 549     for (int i = 1; i <= 3; ++i) {
 550       std::shared_ptr<GeomDataAPI_Point2D> aCurPnt =
 551           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(POINT_ID(i)));
 552       if (aCurPnt->isInitialized())
 553         aPoints[aNbInitialized++] = aCurPnt->pnt();
 554     }
 555
 556     if (aNbInitialized == 1)
 557       aCenterAttr->setValue(aPoints[0]->x(), aPoints[0]->y());
 558     else if (aNbInitialized == 2) {
 559       // calculate center point, which gives a quarter of circle for the given start and end points
 560       std::shared_ptr<GeomAPI_Pnt2d> aStartPnt = aPoints[0];
 561       std::shared_ptr<GeomAPI_Pnt2d> aEndPnt = aPoints[1];
 562       std::shared_ptr<GeomAPI_XY> aDir = aEndPnt->xy()->decreased(aStartPnt->xy())->multiplied(0.5);
 563       double x = aDir->x();
 564       double y = aDir->y();
 565       aDir->setX(x - y);
 566       aDir->setY(y + x);
 567       std::shared_ptr<GeomAPI_XY> aCenter = aStartPnt->xy()->added(aDir);
 568       double aRadius = sqrt(aDir->dot(aDir));
 569
 570       aCenterAttr->setValue(aCenter->x(), aCenter->y());
 571       aRadiusAttr->setValue(aRadius);
 572       anAngleAttr->setValue(90.0);
 573     }
 574     else {
 575       std::shared_ptr<GeomAPI_Circ2d> aCircle(
 576           new GeomAPI_Circ2d(aPoints[0], aPoints[1], aPoints[2]));
 577
 578       std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCircle->center();
 579       if (aCenter) {
 580         aCenterAttr->setValue(aCenter);
 581         if (theID == START_ID() || theID == END_ID())
 582           updateDependentAttributes();
 583         else
 584           calculateArcAngleRadius(aCircle, aPoints[0], aPoints[1], aPoints[2],
 585                                   anAngleAttr, aRadiusAttr);
 586       }
 587     }
 588
 589     data()->blockSendAttributeUpdated(false);
 590   }
 591   else if (anArcType == ARC_TYPE_TANGENT() && (theID == TANGENT_POINT_ID() || theID == END_ID())) {
 592     SketchPlugin_Sketch* aSketch = sketch();
 593     AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 594         data()->attribute(TANGENT_POINT_ID()));
 595
 596     if (aTangPtAttr->isInitialized() && anEndAttr->isInitialized()) {
 597       data()->blockSendAttributeUpdated(true);
 598       // compute orthogonal direction
 599       std::shared_ptr<GeomAPI_Dir2d> anOrthoDir;
 600       std::shared_ptr<GeomDataAPI_Point2D> aTangentPoint =
 601           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aTangPtAttr->attr());
 602       std::shared_ptr<GeomAPI_Pnt2d> aTangPnt2d = aTangentPoint->pnt();
 603       FeaturePtr aTangFeature = ModelAPI_Feature::feature(aTangentPoint->owner());
 604       std::shared_ptr<GeomAPI_Edge> aTangEdge = std::dynamic_pointer_cast<GeomAPI_Edge>(
 605           aTangFeature->lastResult()->shape());
 606       if (aTangEdge->isLine()) {
 607         std::shared_ptr<GeomAPI_Dir> aDir = aTangEdge->line()->direction();
 608         std::shared_ptr<GeomAPI_Pnt> aPnt(new GeomAPI_Pnt(aDir->x(), aDir->y(), aDir->z()));
 609         std::shared_ptr<GeomAPI_Pnt2d> aPnt2d = aSketch->to2D(aPnt);
 610         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(-aPnt2d->y(), aPnt2d->x()));
 611       }
 612       else if (aTangEdge->isArc()) {
 613         std::shared_ptr<GeomAPI_Pnt> aCenter = aTangEdge->circle()->center();
 614         std::shared_ptr<GeomAPI_Pnt2d> aCenter2d = aSketch->to2D(aCenter);
 615         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(
 616             new GeomAPI_Dir2d(aTangPnt2d->xy()->decreased(aCenter2d->xy())));
 617       }
 618
 619       // compute parameters of the middle perpendicular
 620       std::shared_ptr<GeomAPI_XY> aEndPntCoord = anEndAttr->pnt()->xy();
 621       std::shared_ptr<GeomAPI_XY> aTempDir = aEndPntCoord->decreased(aTangPnt2d->xy());
 622       std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(-aTempDir->y(), aTempDir->x()));
 623       std::shared_ptr<GeomAPI_Pnt2d> aMidPnt(
 624           new GeomAPI_Pnt2d(aEndPntCoord->added(aTangPnt2d->xy())->multiplied(0.5)));
 625
 626       // compute center of arc by calculating intersection of orthogonal line and middle perpendicular
 627       std::shared_ptr<GeomAPI_Lin2d> anOrthoLine(new GeomAPI_Lin2d(aTangPnt2d, anOrthoDir));
 628       std::shared_ptr<GeomAPI_Lin2d> aMiddleLine(new GeomAPI_Lin2d(aMidPnt, aMidDir));
 629       std::shared_ptr<GeomAPI_Pnt2d> aCenter = anOrthoLine->intersect(aMiddleLine);
 630       if (aCenter) {
 631         aCenterAttr->setValue(aCenter);
 632         aStartAttr->setValue(aTangPnt2d);
 633         updateDependentAttributes();
 634       }
 635
 636       data()->blockSendAttributeUpdated(false);
 637       tangencyArcConstraints();
 638     }
 639   }
 640 }
 641
 642 void SketchPlugin_Arc::setReversed(bool isReversed)
 643 {
 644   std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()))->setValue(isReversed);
 645   myParamBefore = 0.0;
 646 }
 647
 648 bool SketchPlugin_Arc::isReversed()
 649 {
 650   return std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()))->value();
 651 }
 652
 653 void SketchPlugin_Arc::tangencyArcConstraints()
 654 {
 655   if (!lastResult())
 656     return;
 657
 658   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr =
 659       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(START_ID()));
 660   AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 661       attribute(TANGENT_POINT_ID()));
 662   if (!aTangPtAttr->attr())
 663     return;
 664
 665   FeaturePtr aFeature = ModelAPI_Feature::feature(aStartAttr->owner());
 666   ObjectPtr aThisArc = aFeature->lastResult();
 667   aFeature = ModelAPI_Feature::feature(aTangPtAttr->attr()->owner());
 668   ObjectPtr aTangFeature = aFeature->lastResult();
 669
 670   // trying to find constraints to fix the tangency of the arc
 671   std::set<FeaturePtr> aCoincidence;
 672   std::set<FeaturePtr> aTangency;
 673
 674   AttributeRefAttrPtr aRefAttrA, aRefAttrB;
 675   std::set<AttributePtr> aRefs = data()->refsToMe();
 676   const std::set<AttributePtr>& aRefsToResult = lastResult()->data()->refsToMe();
 677   aRefs.insert(aRefsToResult.begin(), aRefsToResult.end());
 678   std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin();
 679   for (; aRefIt != aRefs.end(); ++aRefIt) {
 680     FeaturePtr aConstrFeature = ModelAPI_Feature::feature((*aRefIt)->owner());
 681     if (aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 682       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 683           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 684       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 685           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 686       if ((aRefAttrA && aRefAttrA->attr() == aStartAttr) ||
 687           (aRefAttrB && aRefAttrB->attr() == aStartAttr))
 688         aCoincidence.insert(aConstrFeature);
 689     }
 690     else if (aConstrFeature->getKind() == SketchPlugin_ConstraintTangent::ID()) {
 691       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 692           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 693       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 694           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 695       if ((aRefAttrA && aRefAttrA->object() == aThisArc) ||
 696           (aRefAttrB && aRefAttrB->object() == aThisArc))
 697         aTangency.insert(aConstrFeature);
 698     }
 699   }
 700   // search applicable pair of constraints
 701   bool isFound = false;
 702   FeaturePtr aPrevCoincidence, aPrevTangency;
 703   std::set<FeaturePtr>::const_iterator aCIt, aTIt;
 704   for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end() && !isFound; ++aCIt) {
 705     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 706         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 707     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 708         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 709     AttributePtr anOtherPoint =
 710         aRefAttrA->attr() == aStartAttr ? aRefAttrB->attr() : aRefAttrA->attr();
 711     for (aTIt = aTangency.begin(); aTIt != aTangency.end() && !isFound; ++aTIt) {
 712       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 713           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 714       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 715           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 716       ObjectPtr anOtherObject = aRefAttrA->object() == aThisArc ?
 717           aRefAttrB->object() : aRefAttrA->object();
 718       if (anOtherPoint->owner() == anOtherObject) {
 719         isFound = true;
 720         aPrevCoincidence = *aCIt;
 721         aPrevTangency = *aTIt;
 722       }
 723     }
 724   }
 725
 726   if (isFound) {
 727     // update previous constraints
 728     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 729         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_A()));
 730     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 731         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_B()));
 732     if (aRefAttrA->attr() == aStartAttr)
 733       aRefAttrB->setAttr(aTangPtAttr->attr());
 734     else
 735       aRefAttrA->setAttr(aTangPtAttr->attr());
 736
 737     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 738         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_A()));
 739     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 740         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_B()));
 741     if (aRefAttrA->object() == aThisArc)
 742       aRefAttrB->setObject(aTangFeature);
 743     else
 744       aRefAttrA->setObject(aTangFeature);
 745   } else {
 746     // Wait all constraints being removed, then send update events
 747     static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 748     bool isDeleteFlushed = Events_Loop::loop()->isFlushed(aDeleteEvent);
 749     if (isDeleteFlushed)
 750       Events_Loop::loop()->setFlushed(aDeleteEvent, false);
 751     // Remove all obtained constraints which use current arc, because
 752     // there is no information which of them were used to build tangency arc.
 753     DocumentPtr aDoc = sketch()->document();
 754     for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end(); ++aCIt)
 755       aDoc->removeFeature(*aCIt);
 756     for (aTIt = aTangency.begin(); aTIt != aTangency.end(); ++aTIt)
 757       aDoc->removeFeature(*aTIt);
 758     // Send events to update the sub-features by the solver.
 759     if (isDeleteFlushed)
 760       Events_Loop::loop()->setFlushed(aDeleteEvent, true);
 761     else
 762       Events_Loop::loop()->flush(aDeleteEvent);
 763
 764     // Wait all constraints being created, then send update events
 765     static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 766     bool isUpdateFlushed = Events_Loop::loop()->isFlushed(anUpdateEvent);
 767     if (isUpdateFlushed)
 768       Events_Loop::loop()->setFlushed(anUpdateEvent, false);
 769
 770     // Create new constraints
 771     FeaturePtr aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 772     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 773         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 774     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 775         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 776     aRefAttrA->setAttr(aStartAttr);
 777     aRefAttrB->setAttr(aTangPtAttr->attr());
 778     aConstraint->execute();
 779     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 780
 781     aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::ID());
 782     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 783         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 784     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 785         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 786     aRefAttrA->setObject(aThisArc);
 787     aRefAttrB->setObject(aTangFeature);
 788     aConstraint->execute();
 789     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, anUpdateEvent);
 790
 791     // Send events to update the sub-features by the solver.
 792     if(isUpdateFlushed)
 793       Events_Loop::loop()->setFlushed(anUpdateEvent, true);
 794   }
 795 }
 796
 797 void SketchPlugin_Arc::projectEndPoint()
 798 {
 799   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 800       GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 801   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 802       GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 803   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 804       GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 805
 806   if (aCenterAttr->pnt()->distance(aStartAttr->pnt()) < tolerance)
 807     return;
 808   data()->blockSendAttributeUpdated(true);
 809   // compute and change the arc end point
 810   std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(
 811       new GeomAPI_Circ2d(aCenterAttr->pnt(), aStartAttr->pnt()));
 812   std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEndAttr->pnt());
 813   if (aProjection && anEndAttr->pnt()->distance(aProjection) > tolerance)
 814     anEndAttr->setValue(aProjection);
 815   updateDependentAttributes();
 816   data()->blockSendAttributeUpdated(false);
 817 }