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 = 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     std::shared_ptr<GeomAPI_Dir> anXDir(new GeomAPI_Dir(aStartPoint->xyz()->decreased(aCenter->xyz())));
 149     std::shared_ptr<GeomAPI_Ax2> anAx2(new GeomAPI_Ax2(aCenter, aNormal, anXDir));
 150     std::shared_ptr<GeomAPI_Circ> aCirc(new GeomAPI_Circ(anAx2, aCenter->distance(aStartPoint)));
 151     double aParameterNew = 0.0;
 152     if(aCirc->parameter(aEndPoint, paramTolerance, aParameterNew)) {
 153       if(0 <= myParamBefore && myParamBefore <= PI / 2.0
 154         && PI * 1.5 <= aParameterNew && aParameterNew <= PI * 2.0) {
 155           isInversed->setValue(true);
 156       } else if(PI * 1.5 <= myParamBefore && myParamBefore <= PI * 2.0
 157         && 0 <= aParameterNew && aParameterNew <= PI / 2.0) {
 158           isInversed->setValue(false);
 159       }
 160     }
 161     myParamBefore = aParameterNew;
 162
 163     std::shared_ptr<GeomAPI_Shape> aCircleShape;
 164     if(!isInversed->value()) {
 165       aCircleShape = GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStartPoint, aEndPoint, aNormal);
 166     } else {
 167       aCircleShape = GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aEndPoint, aStartPoint, aNormal);
 168     }
 169
 170     if (aCircleShape) {
 171       std::shared_ptr<ModelAPI_ResultConstruction> aConstr2 = document()->createConstruction(
 172           data(), 1);
 173       aConstr2->setShape(aCircleShape);
 174       aConstr2->setIsInHistory(false);
 175       setResult(aConstr2, 1);
 176     }
 177   }
 178 }
 179
 180 AISObjectPtr SketchPlugin_Arc::getAISObject(AISObjectPtr thePrevious)
 181 {
 182   SketchPlugin_Sketch* aSketch = sketch();
 183   if (aSketch) {
 184     // if the feature is valid, the execute() method should be performed, AIS object is empty
 185     if (!isFeatureValid()) {
 186       // compute a circle point in 3D view
 187       std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 188           GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 189
 190       std::list<std::shared_ptr<GeomAPI_Shape> > aShapes;
 191       if (aCenterAttr->isInitialized()) {
 192         std::shared_ptr<GeomAPI_Pnt> aCenter(aSketch->to3D(aCenterAttr->x(), aCenterAttr->y()));
 193
 194         std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 195             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 196         std::shared_ptr<GeomDataAPI_Point2D> aEndAttr = std::dynamic_pointer_cast<
 197             GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 198         AttributeStringPtr aTypeAttr = std::dynamic_pointer_cast<ModelAPI_AttributeString>(
 199             data()->attribute(ARC_TYPE()));
 200
 201         if (aStartAttr->isInitialized()) {
 202           // make a visible circle
 203           std::shared_ptr<GeomDataAPI_Dir> aNDir = std::dynamic_pointer_cast<GeomDataAPI_Dir>(
 204               aSketch->data()->attribute(SketchPlugin_Sketch::NORM_ID()));
 205           bool aHasPlane = aNDir && !(aNDir->x() == 0 && aNDir->y() == 0 && aNDir->z() == 0);
 206           if (aHasPlane) {
 207             std::shared_ptr<GeomAPI_Dir> aNormal = aNDir->dir();
 208             std::shared_ptr<GeomAPI_Pnt> aStartPoint(aSketch->to3D(aStartAttr->x(), aStartAttr->y()));
 209             std::shared_ptr<GeomAPI_Pnt> aEndPoint = aStartPoint;
 210             if (aTypeAttr && aTypeAttr->isInitialized() &&
 211                 aTypeAttr->value() == ARC_TYPE_THREE_POINTS() && aEndAttr->isInitialized() &&
 212                 aEndAttr->pnt()->distance(aStartAttr->pnt()) > tolerance) {
 213               aEndPoint = aSketch->to3D(aEndAttr->x(), aEndAttr->y());
 214               std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 215                 std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 216               if (!aPassedAttr->isInitialized()) { // calculate the appropriate center for the presentation
 217                 // check that center is bad for the current start and end and must be recomputed
 218                 std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(new GeomAPI_Circ2d(
 219                   aCenterAttr->pnt(), aStartAttr->pnt()));
 220                 std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(aEndAttr->pnt());
 221                 if (!aProjection.get() || aEndAttr->pnt()->distance(aProjection) > tolerance) {
 222                   std::shared_ptr<GeomAPI_XY> aDir =
 223                     aEndAttr->pnt()->xy()->decreased(aStartAttr->pnt()->xy())->multiplied(0.5);
 224                   double x = aDir->x();
 225                   double y = aDir->y();
 226                   aDir->setX(x - y);
 227                   aDir->setY(y + x);
 228                   std::shared_ptr<GeomAPI_XY> aCenterXY = aStartAttr->pnt()->xy()->added(aDir);
 229                   aCenter = aSketch->to3D(aCenterXY->x(), aCenterXY->y());
 230                 }
 231               }
 232             }
 233             AttributeBooleanPtr isInversed =
 234               std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()));
 235
 236             std::shared_ptr<GeomAPI_Shape> aCircleShape =
 237               (isInversed->isInitialized() && isInversed->value()) ?
 238                 GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aEndPoint, aStartPoint, aNormal) :
 239                 GeomAlgoAPI_EdgeBuilder::lineCircleArc(aCenter, aStartPoint, aEndPoint, aNormal);
 240
 241             if (aCircleShape)
 242               aShapes.push_back(aCircleShape);
 243           }
 244         }
 245         // make a visible point
 246         std::shared_ptr<GeomAPI_Shape> aCenterPointShape = GeomAlgoAPI_PointBuilder::vertex(aCenter);
 247         aShapes.push_back(aCenterPointShape);
 248       }
 249       if (!aShapes.empty()) {
 250         std::shared_ptr<GeomAPI_Shape> aCompound = GeomAlgoAPI_CompoundBuilder::compound(aShapes);
 251         AISObjectPtr anAIS = thePrevious;
 252         if (!anAIS)
 253           anAIS = AISObjectPtr(new GeomAPI_AISObject);
 254         anAIS->createShape(aCompound);
 255         anAIS->setWidth(3);
 256         return anAIS;
 257       }
 258     }
 259   }
 260   return AISObjectPtr();
 261 }
 262
 263 void SketchPlugin_Arc::move(double theDeltaX, double theDeltaY)
 264 {
 265   std::shared_ptr<ModelAPI_Data> aData = data();
 266   if (!aData->isValid())
 267     return;
 268
 269   aData->blockSendAttributeUpdated(true);
 270
 271   myStartUpdate = true;
 272   myEndUpdate = true;
 273   std::shared_ptr<GeomDataAPI_Point2D> aPoint2 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 274       aData->attribute(SketchPlugin_Arc::START_ID()));
 275   if (aPoint2->isInitialized())
 276     aPoint2->move(theDeltaX, theDeltaY);
 277
 278   std::shared_ptr<GeomDataAPI_Point2D> aPoint3 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 279       aData->attribute(SketchPlugin_Arc::END_ID()));
 280   if (aPoint3->isInitialized())
 281     aPoint3->move(theDeltaX, theDeltaY);
 282   myStartUpdate = false;
 283   myEndUpdate = false;
 284
 285   std::shared_ptr<GeomDataAPI_Point2D> aPoint1 = std::dynamic_pointer_cast<GeomDataAPI_Point2D>(
 286       aData->attribute(SketchPlugin_Arc::CENTER_ID()));
 287   if (aPoint1->isInitialized())
 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   if (aPassedPoint->isInitialized())
 293     aPassedPoint->move(theDeltaX, theDeltaY);
 294   aData->blockSendAttributeUpdated(false);
 295 }
 296
 297 bool SketchPlugin_Arc::isFixed() {
 298   return data()->selection(EXTERNAL_ID())->context().get() != NULL;
 299 }
 300
 301 bool SketchPlugin_Arc::isFeatureValid()
 302 {
 303   AttributeStringPtr anArcTypeAttr =
 304       std::dynamic_pointer_cast<ModelAPI_AttributeString>(data()->attribute(ARC_TYPE()));
 305   if (!anArcTypeAttr)
 306     return false;
 307   std::string anArcType = anArcTypeAttr->value();
 308
 309   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 310       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::CENTER_ID()));
 311   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 312       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::START_ID()));
 313   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 314       GeomDataAPI_Point2D>(data()->attribute(SketchPlugin_Arc::END_ID()));
 315   std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr = std::dynamic_pointer_cast<
 316       GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 317
 318   bool isValid = false;
 319   if (anArcType == ARC_TYPE_THREE_POINTS())
 320     isValid = aStartAttr->isInitialized() && anEndAttr->isInitialized() && aPassedAttr->isInitialized();
 321   else
 322     isValid = aCenterAttr->isInitialized() && aStartAttr->isInitialized() && anEndAttr->isInitialized();
 323
 324   return isValid;
 325 }
 326
 327 static inline void adjustPeriod(double& theParam)
 328 {
 329   static const double PERIOD = 2.0 * PI;
 330   while (theParam < 0.0) theParam += PERIOD;
 331   while (theParam >= PERIOD) theParam -= PERIOD;
 332 }
 333
 334 void SketchPlugin_Arc::attributeChanged(const std::string& theID)
 335 {
 336   std::shared_ptr<GeomDataAPI_Point2D> aCenterAttr = std::dynamic_pointer_cast<
 337       GeomDataAPI_Point2D>(data()->attribute(CENTER_ID()));
 338   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr = std::dynamic_pointer_cast<
 339       GeomDataAPI_Point2D>(data()->attribute(START_ID()));
 340   std::shared_ptr<GeomDataAPI_Point2D> anEndAttr = std::dynamic_pointer_cast<
 341       GeomDataAPI_Point2D>(data()->attribute(END_ID()));
 342   // the second condition for unability to move external segments anywhere
 343   if (theID == EXTERNAL_ID() || isFixed()) {
 344     std::shared_ptr<GeomAPI_Shape> aSelection = data()->selection(EXTERNAL_ID())->value();
 345     if (!aSelection) {
 346       // empty shape in selection shows that the shape is equal to context
 347       ResultPtr anExtRes = selection(EXTERNAL_ID())->context();
 348       if (anExtRes)
 349         aSelection = anExtRes->shape();
 350     }
 351     // update arguments due to the selection value
 352     if (aSelection && !aSelection->isNull() && aSelection->isEdge()) {
 353       std::shared_ptr<GeomAPI_Edge> anEdge( new GeomAPI_Edge(aSelection));
 354       std::shared_ptr<GeomAPI_Circ> aCirc = anEdge->circle();
 355       if (aCirc.get()) {
 356         aStartAttr->setValue(sketch()->to2D(anEdge->firstPoint()));
 357         anEndAttr->setValue(sketch()->to2D(anEdge->lastPoint()));
 358         aCenterAttr->setValue(sketch()->to2D(aCirc->center()));
 359
 360         data()->real(RADIUS_ID())->setValue(aCirc->radius());
 361         double aStartAngle, aEndAngle;
 362         anEdge->getRange(aStartAngle, aEndAngle);
 363         data()->real(ANGLE_ID())->setValue(aEndAngle - aStartAngle);
 364       }
 365     }
 366     return;
 367   }
 368   AttributeStringPtr aTypeAttr =
 369       std::dynamic_pointer_cast<ModelAPI_AttributeString>(attribute(ARC_TYPE()));
 370
 371   // this is before others since here end attribute may be changed, but with the special behavior
 372   if (aTypeAttr->value() == ARC_TYPE_TANGENT() && (theID == TANGENT_POINT_ID() || theID == END_ID())) {
 373     SketchPlugin_Sketch* aSketch = sketch();
 374     AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 375         data()->attribute(TANGENT_POINT_ID()));
 376
 377     if (aTangPtAttr->isInitialized() && anEndAttr->isInitialized()) {
 378       // compute orthogonal direction
 379       std::shared_ptr<GeomAPI_Dir2d> anOrthoDir;
 380       std::shared_ptr<GeomDataAPI_Point2D> aTangentPoint =
 381           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(aTangPtAttr->attr());
 382       std::shared_ptr<GeomAPI_Pnt2d> aTangPnt2d = aTangentPoint->pnt();
 383       if (aTangPnt2d->isEqual(anEndAttr->pnt()))
 384         return;
 385       FeaturePtr aTangFeature = ModelAPI_Feature::feature(aTangentPoint->owner());
 386       std::shared_ptr<GeomAPI_Edge> aTangEdge = std::dynamic_pointer_cast<GeomAPI_Edge>(
 387           aTangFeature->lastResult()->shape());
 388       if (aTangEdge->isLine()) {
 389         std::shared_ptr<GeomAPI_Dir> aDir = aTangEdge->line()->direction();
 390         std::shared_ptr<GeomAPI_Pnt> aPnt(new GeomAPI_Pnt(aDir->x(), aDir->y(), aDir->z()));
 391         std::shared_ptr<GeomAPI_Pnt2d> aPnt2d = aSketch->to2D(aPnt);
 392         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(-aPnt2d->y(), aPnt2d->x()));
 393       }
 394       else if (aTangEdge->isArc()) {
 395         std::shared_ptr<GeomAPI_Pnt> aCenter = aTangEdge->circle()->center();
 396         std::shared_ptr<GeomAPI_Pnt2d> aCenter2d = aSketch->to2D(aCenter);
 397         anOrthoDir = std::shared_ptr<GeomAPI_Dir2d>(
 398             new GeomAPI_Dir2d(aTangPnt2d->xy()->decreased(aCenter2d->xy())));
 399       }
 400
 401       // compute parameters of the middle perpendicular
 402       std::shared_ptr<GeomAPI_XY> aEndPntCoord = anEndAttr->pnt()->xy();
 403       std::shared_ptr<GeomAPI_XY> aTempDir = aEndPntCoord->decreased(aTangPnt2d->xy());
 404       std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(-aTempDir->y(), aTempDir->x()));
 405       std::shared_ptr<GeomAPI_Pnt2d> aMidPnt(
 406           new GeomAPI_Pnt2d(aEndPntCoord->added(aTangPnt2d->xy())->multiplied(0.5)));
 407
 408       // compute center of arc by calculating intersection of orthogonal line and middle perpendicular
 409       std::shared_ptr<GeomAPI_Lin2d> anOrthoLine(new GeomAPI_Lin2d(aTangPnt2d, anOrthoDir));
 410       std::shared_ptr<GeomAPI_Lin2d> aMiddleLine(new GeomAPI_Lin2d(aMidPnt, aMidDir));
 411       std::shared_ptr<GeomAPI_Pnt2d> aCenter = anOrthoLine->intersect(aMiddleLine);
 412       if (aCenter) {
 413         data()->blockSendAttributeUpdated(true);
 414         aCenterAttr->setValue(aCenter);
 415         aStartAttr->setValue(aTangPnt2d);
 416         data()->blockSendAttributeUpdated(false);
 417       }
 418
 419       tangencyArcConstraints();
 420     }
 421     return;
 422   }
 423
 424   // if changed the base attributes, update all other (is necessary) without recursion
 425   if (theID == CENTER_ID() || theID == START_ID() || theID == END_ID() || theID == ARC_TYPE()) {
 426     if (!isFeatureValid())
 427       return;
 428     std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
 429     std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
 430     std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
 431     double aRadius = aCenter->distance(aStart);
 432     if (aRadius < tolerance)
 433       return;
 434     std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(new GeomAPI_Circ2d(aCenter, aStart));
 435
 436     data()->blockSendAttributeUpdated(true);
 437     if (theID == END_ID() && isStable()) {
 438       // The arc is under construction, so its end point projected
 439       // on the circle formed by center and start points
 440       std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEnd);
 441       if (aProjection && anEnd->distance(aProjection) > tolerance) {
 442         anEndAttr->setValue(aProjection);
 443         anEnd = aProjection;
 444       }
 445     }
 446     // update all other attributes due to the base attributes values
 447     if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) { // update passed point due to start, end and center
 448       if (aCenter->distance(aStart) > tolerance && aCenter->distance(anEnd) > tolerance) {
 449         // project passed point t othe circle
 450         std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 451           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 452         if (aPassedAttr->isInitialized()) {
 453           std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(aPassedAttr->pnt());
 454           if (aProjection && aPassedAttr->pnt()->distance(aProjection) > tolerance) {
 455             aPassedAttr->setValue(aProjection);
 456           }
 457         } else { // initialize it by some middle - value
 458           std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(
 459             aStart->xy()->decreased(aCenter->xy())));
 460           std::shared_ptr<GeomAPI_Dir2d> aEndDir(new GeomAPI_Dir2d(
 461             anEnd->xy()->decreased(aCenter->xy())));
 462           std::shared_ptr<GeomAPI_XY> aMidDirXY = aStartDir->xy()->added(aEndDir->xy());
 463           if (aMidDirXY->dot(aMidDirXY) < tolerance * tolerance) {
 464             // start and end directions are opposite, so middle direction will be orthogonal
 465             aMidDirXY->setX(-aStartDir->y());
 466             aMidDirXY->setY(aStartDir->x());
 467           }
 468           std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(aMidDirXY));
 469           if ((aStartDir->cross(aMidDir) > 0) ^ !isReversed())
 470             aMidDir->reverse();
 471           std::shared_ptr<GeomAPI_XY> aPassedPnt =
 472             aCenter->xy()->added(aMidDir->xy()->multiplied(aCenter->distance(aStart)));
 473           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()))->
 474             setValue(aPassedPnt->x(), aPassedPnt->y());
 475         }
 476       }
 477     }
 478     // update radius and angle
 479     AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 480         data()->attribute(RADIUS_ID()));
 481     aRadiusAttr->setValue(aRadius);
 482     AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 483         data()->attribute(ANGLE_ID()));
 484     std::shared_ptr<GeomAPI_Circ2d> aCircle(new GeomAPI_Circ2d(aCenter, aStart));
 485     double aStartParam, aEndParam;
 486     aCircle->parameter(aStart, paramTolerance, aStartParam);
 487     aCircle->parameter(anEnd, paramTolerance, aEndParam);
 488     adjustPeriod(aStartParam);
 489     adjustPeriod(aEndParam);
 490     if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) { // use the passed point for the angle calculation
 491       std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
 492         std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
 493       double aPassedParam;
 494       aCircle->parameter(aPassedAttr->pnt(), paramTolerance, aPassedParam);
 495       adjustPeriod(aPassedParam);
 496       double aNewAngle = aPassedParam >= aStartParam && aPassedParam <= aEndParam ?
 497         ((aEndParam - aStartParam) * 180.0 / PI) :
 498         ((aEndParam - aStartParam - 2.0 * PI) * 180.0 / PI);
 499       if (!anAngleAttr->isInitialized() || fabs(aNewAngle - anAngleAttr->value()) > tolerance)
 500         anAngleAttr->setValue(aNewAngle);
 501     } else {
 502       double aNewAngle = (aEndParam - aStartParam) * 180.0 / PI;
 503       if (!anAngleAttr->isInitialized() || fabs(aNewAngle - anAngleAttr->value()) > tolerance)
 504         anAngleAttr->setValue(aNewAngle);
 505     }
 506     // do not need to inform that other parameters were changed in this basis mode: these arguments
 507     // change is enough
 508     data()->blockSendAttributeUpdated(false, false);
 509     return;
 510   }
 511
 512   if (theID == PASSED_POINT_ID()) {
 513     data()->blockSendAttributeUpdated(true);
 514
 515     std::shared_ptr<GeomAPI_Pnt2d> aPoints[3];
 516     int aNbInitialized = 0;
 517     for (int i = 1; i <= 3; ++i) {
 518       std::shared_ptr<GeomDataAPI_Point2D> aCurPnt =
 519           std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(POINT_ID(i)));
 520       if (aCurPnt->isInitialized())
 521         aPoints[aNbInitialized++] = aCurPnt->pnt();
 522     }
 523
 524     if (aNbInitialized == 3) {
 525       std::shared_ptr<GeomAPI_Circ2d> aCircle(
 526           new GeomAPI_Circ2d(aPoints[0], aPoints[1], aPoints[2]));
 527
 528       std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCircle->center();
 529       if (aCenter) {
 530         aCenterAttr->setValue(aCenter);
 531       }
 532     }
 533     data()->blockSendAttributeUpdated(false);
 534     return;
 535   }
 536
 537   if (theID == RADIUS_ID()) {
 538     if (!aStartAttr->isInitialized() || !anEndAttr->isInitialized() || !aCenterAttr->isInitialized())
 539       return;
 540     // move center and passed point
 541     std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
 542     std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
 543     std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
 544     if (aStart->distance(aCenter) < tolerance || anEnd->distance(aCenter) < tolerance)
 545       return;
 546     AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 547         data()->attribute(RADIUS_ID()));
 548     double aRadius = aRadiusAttr->value();
 549
 550     data()->blockSendAttributeUpdated(true);
 551     std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(aStart->xy()->decreased(aCenter->xy())));
 552     std::shared_ptr<GeomAPI_XY> aNewStart = aStartDir->xy()->multiplied(aRadius)->added(aCenter->xy());
 553     aStartAttr->setValue(aNewStart->x(), aNewStart->y());
 554     std::shared_ptr<GeomAPI_Dir2d> anEndDir(new GeomAPI_Dir2d(anEnd->xy()->decreased(aCenter->xy())));
 555     std::shared_ptr<GeomAPI_XY> aNewEnd = anEndDir->xy()->multiplied(aRadius)->added(aCenter->xy());
 556     anEndAttr->setValue(aNewEnd->x(), aNewEnd->y());
 557     data()->blockSendAttributeUpdated(false);
 558     return;
 559   }
 560   if (theID == ANGLE_ID()) {
 561     if (!aStartAttr->isInitialized() || !aCenterAttr->isInitialized())
 562       return;
 563     AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
 564         data()->attribute(ANGLE_ID()));
 565     data()->blockSendAttributeUpdated(true);
 566     // move end point and passed point
 567     std::shared_ptr<GeomAPI_XY> aCenter = aCenterAttr->pnt()->xy();
 568     double anAngle = anAngleAttr->value() * PI / 180.0;
 569     double sinA = sin(anAngle);
 570     double cosA = cos(anAngle);
 571     std::shared_ptr<GeomAPI_XY> aStartDir = aStartAttr->pnt()->xy()->decreased(aCenter);
 572     std::shared_ptr<GeomAPI_XY> aDir(new GeomAPI_XY(
 573         aStartDir->x() * cosA - aStartDir->y() * sinA,
 574         aStartDir->x() * sinA + aStartDir->y() * cosA));
 575     anEndAttr->setValue(aCenter->x() + aDir->x(), aCenter->y() + aDir->y());
 576     data()->blockSendAttributeUpdated(false);
 577     return;
 578   }
 579 }
 580
 581 void SketchPlugin_Arc::setReversed(bool isReversed)
 582 {
 583   std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()))->setValue(isReversed);
 584   myParamBefore = 0.0;
 585 }
 586
 587 bool SketchPlugin_Arc::isReversed()
 588 {
 589   return std::dynamic_pointer_cast<ModelAPI_AttributeBoolean>(attribute(INVERSED_ID()))->value();
 590 }
 591
 592 void SketchPlugin_Arc::tangencyArcConstraints()
 593 {
 594   if (!lastResult())
 595     return;
 596
 597   std::shared_ptr<GeomDataAPI_Point2D> aStartAttr =
 598       std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(START_ID()));
 599   AttributeRefAttrPtr aTangPtAttr = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 600       attribute(TANGENT_POINT_ID()));
 601   if (!aTangPtAttr->attr())
 602     return;
 603
 604   FeaturePtr aFeature = ModelAPI_Feature::feature(aStartAttr->owner());
 605   ObjectPtr aThisArc = aFeature->lastResult();
 606   aFeature = ModelAPI_Feature::feature(aTangPtAttr->attr()->owner());
 607   ObjectPtr aTangFeature = aFeature->lastResult();
 608
 609   // trying to find constraints to fix the tangency of the arc
 610   std::set<FeaturePtr> aCoincidence;
 611   std::set<FeaturePtr> aTangency;
 612
 613   AttributeRefAttrPtr aRefAttrA, aRefAttrB;
 614   std::set<AttributePtr> aRefs = data()->refsToMe();
 615   const std::set<AttributePtr>& aRefsToResult = lastResult()->data()->refsToMe();
 616   aRefs.insert(aRefsToResult.begin(), aRefsToResult.end());
 617   std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin();
 618   for (; aRefIt != aRefs.end(); ++aRefIt) {
 619     FeaturePtr aConstrFeature = ModelAPI_Feature::feature((*aRefIt)->owner());
 620     if (aConstrFeature->getKind() == SketchPlugin_ConstraintCoincidence::ID()) {
 621       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 622           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 623       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 624           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 625       if ((aRefAttrA && aRefAttrA->attr() == aStartAttr) ||
 626           (aRefAttrB && aRefAttrB->attr() == aStartAttr))
 627         aCoincidence.insert(aConstrFeature);
 628     }
 629     else if (aConstrFeature->getKind() == SketchPlugin_ConstraintTangent::ID()) {
 630       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 631           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_A()));
 632       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 633           aConstrFeature->attribute(SketchPlugin_Constraint::ENTITY_B()));
 634       if ((aRefAttrA && aRefAttrA->object() == aThisArc) ||
 635           (aRefAttrB && aRefAttrB->object() == aThisArc))
 636         aTangency.insert(aConstrFeature);
 637     }
 638   }
 639   // search applicable pair of constraints
 640   bool isFound = false;
 641   FeaturePtr aPrevCoincidence, aPrevTangency;
 642   std::set<FeaturePtr>::const_iterator aCIt, aTIt;
 643   for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end() && !isFound; ++aCIt) {
 644     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 645         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 646     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 647         (*aCIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 648     AttributePtr anOtherPoint =
 649         aRefAttrA->attr() == aStartAttr ? aRefAttrB->attr() : aRefAttrA->attr();
 650     for (aTIt = aTangency.begin(); aTIt != aTangency.end() && !isFound; ++aTIt) {
 651       aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 652           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_A()));
 653       aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 654           (*aTIt)->attribute(SketchPlugin_Constraint::ENTITY_B()));
 655       ObjectPtr anOtherObject = aRefAttrA->object() == aThisArc ?
 656           aRefAttrB->object() : aRefAttrA->object();
 657       FeaturePtr anOtherFeature = ModelAPI_Feature::feature(anOtherObject);
 658       if (anOtherPoint->owner() == anOtherFeature) {
 659         isFound = true;
 660         aPrevCoincidence = *aCIt;
 661         aPrevTangency = *aTIt;
 662       }
 663     }
 664   }
 665
 666   if (isFound) {
 667     // update previous constraints
 668     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 669         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_A()));
 670     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 671         aPrevCoincidence->attribute(SketchPlugin_Constraint::ENTITY_B()));
 672     if (aRefAttrA->attr() == aStartAttr)
 673       aRefAttrB->setAttr(aTangPtAttr->attr());
 674     else
 675       aRefAttrA->setAttr(aTangPtAttr->attr());
 676
 677     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 678         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_A()));
 679     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 680         aPrevTangency->attribute(SketchPlugin_Constraint::ENTITY_B()));
 681     if (aRefAttrA->object() == aThisArc)
 682       aRefAttrB->setObject(aTangFeature);
 683     else
 684       aRefAttrA->setObject(aTangFeature);
 685   } else {
 686     // Wait all constraints being removed, then send update events
 687     static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 688     bool isDeleteFlushed = Events_Loop::loop()->isFlushed(aDeleteEvent);
 689     if (isDeleteFlushed)
 690       Events_Loop::loop()->setFlushed(aDeleteEvent, false);
 691     // Remove all obtained constraints which use current arc, because
 692     // there is no information which of them were used to build tangency arc.
 693     DocumentPtr aDoc = sketch()->document();
 694     std::set<FeaturePtr> aFeaturesToBeRemoved;
 695     for (aCIt = aCoincidence.begin(); aCIt != aCoincidence.end(); ++aCIt)
 696       aFeaturesToBeRemoved.insert(*aCIt);
 697     for (aTIt = aTangency.begin(); aTIt != aTangency.end(); ++aTIt)
 698       aFeaturesToBeRemoved.insert(*aTIt);
 699     ModelAPI_Tools::removeFeaturesAndReferences(aFeaturesToBeRemoved);
 700     // Send events to update the sub-features by the solver.
 701     if (isDeleteFlushed)
 702       Events_Loop::loop()->setFlushed(aDeleteEvent, true);
 703     else
 704       Events_Loop::loop()->flush(aDeleteEvent);
 705
 706     // Wait all constraints being created, then send update events
 707     static Events_ID aCreateEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 708     bool isCreateFlushed = Events_Loop::loop()->isFlushed(aCreateEvent);
 709     if (isCreateFlushed)
 710       Events_Loop::loop()->setFlushed(aCreateEvent, false);
 711
 712     // Create new constraints
 713     FeaturePtr aConstraint = sketch()->addFeature(SketchPlugin_ConstraintCoincidence::ID());
 714     aRefAttrA = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 715         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_A()));
 716     aRefAttrB = std::dynamic_pointer_cast<ModelAPI_AttributeRefAttr>(
 717         aConstraint->attribute(SketchPlugin_Constraint::ENTITY_B()));
 718     aRefAttrA->setAttr(aStartAttr);
 719     aRefAttrB->setAttr(aTangPtAttr->attr());
 720     aConstraint->execute();
 721     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, aCreateEvent);
 722
 723     aConstraint = sketch()->addFeature(SketchPlugin_ConstraintTangent::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->setObject(aThisArc);
 729     aRefAttrB->setObject(aTangFeature);
 730     aConstraint->execute();
 731     ModelAPI_EventCreator::get()->sendUpdated(aConstraint, aCreateEvent);
 732
 733     // Send events to update the sub-features by the solver.
 734     if(isCreateFlushed)
 735       Events_Loop::loop()->setFlushed(aCreateEvent, true);
 736     else
 737       Events_Loop::loop()->flush(aCreateEvent);
 738   }
 739 }