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