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