+ return;
+ }
+
+ // if changed the base attributes, update all other (is necessary) without recursion
+ if (theID == CENTER_ID() || theID == START_ID() || theID == END_ID() || theID == ARC_TYPE()) {
+ if (!isFeatureValid())
+ return;
+ std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
+ std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
+ std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
+ double aRadius = aCenter->distance(aStart);
+ if (aRadius < tolerance)
+ return;
+ std::shared_ptr<GeomAPI_Circ2d> aCircleForArc(new GeomAPI_Circ2d(aCenter, aStart));
+
+ data()->blockSendAttributeUpdated(true);
+ if (theID == END_ID() && isStable()) {
+ // The arc is under construction, so its end point projected
+ // on the circle formed by center and start points
+ std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(anEnd);
+ if (aProjection && anEnd->distance(aProjection) > tolerance) {
+ anEndAttr->setValue(aProjection);
+ anEnd = aProjection;
+ }
+ }
+ // update all other attributes due to the base attributes values
+ if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) { // update passed point due to start, end and center
+ if (aCenter->distance(aStart) > tolerance && aCenter->distance(anEnd) > tolerance) {
+ // project passed point t othe circle
+ std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
+ std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
+ if (aPassedAttr->isInitialized()) {
+ std::shared_ptr<GeomAPI_Pnt2d> aProjection = aCircleForArc->project(aPassedAttr->pnt());
+ if (aProjection && aPassedAttr->pnt()->distance(aProjection) > tolerance) {
+ aPassedAttr->setValue(aProjection);
+ }
+ } else { // initialize it by some middle - value
+ std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(
+ aStart->xy()->decreased(aCenter->xy())));
+ std::shared_ptr<GeomAPI_Dir2d> aEndDir(new GeomAPI_Dir2d(
+ anEnd->xy()->decreased(aCenter->xy())));
+ std::shared_ptr<GeomAPI_XY> aMidDirXY = aStartDir->xy()->added(aEndDir->xy());
+ if (aMidDirXY->dot(aMidDirXY) < tolerance * tolerance) {
+ // start and end directions are opposite, so middle direction will be orthogonal
+ aMidDirXY->setX(-aStartDir->y());
+ aMidDirXY->setY(aStartDir->x());
+ }
+ std::shared_ptr<GeomAPI_Dir2d> aMidDir(new GeomAPI_Dir2d(aMidDirXY));
+ if ((aStartDir->cross(aMidDir) > 0) ^ !isReversed())
+ aMidDir->reverse();
+ std::shared_ptr<GeomAPI_XY> aPassedPnt =
+ aCenter->xy()->added(aMidDir->xy()->multiplied(aCenter->distance(aStart)));
+ std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()))->
+ setValue(aPassedPnt->x(), aPassedPnt->y());
+ }
+ }
+ }
+ // update radius and angle
+ AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
+ data()->attribute(RADIUS_ID()));
+ aRadiusAttr->setValue(aRadius);
+ AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
+ data()->attribute(ANGLE_ID()));
+ std::shared_ptr<GeomAPI_Circ2d> aCircle(new GeomAPI_Circ2d(aCenter, aStart));
+ double aStartParam, aEndParam;
+ aCircle->parameter(aStart, paramTolerance, aStartParam);
+ aCircle->parameter(anEnd, paramTolerance, aEndParam);
+ adjustPeriod(aStartParam);
+ adjustPeriod(aEndParam);
+ if (aTypeAttr->value() == ARC_TYPE_THREE_POINTS()) { // use the passed point for the angle calculation
+ std::shared_ptr<GeomDataAPI_Point2D> aPassedAttr =
+ std::dynamic_pointer_cast<GeomDataAPI_Point2D>(data()->attribute(PASSED_POINT_ID()));
+ double aPassedParam;
+ aCircle->parameter(aPassedAttr->pnt(), paramTolerance, aPassedParam);
+ adjustPeriod(aPassedParam);
+ double aNewAngle = aPassedParam >= aStartParam && aPassedParam <= aEndParam ?
+ ((aEndParam - aStartParam) * 180.0 / PI) :
+ ((aEndParam - aStartParam - 2.0 * PI) * 180.0 / PI);
+ if (fabs(aNewAngle - anAngleAttr->value()) > tolerance)
+ anAngleAttr->setValue(aNewAngle);
+ } else {
+ double aNewAngle = (aEndParam - aStartParam) * 180.0 / PI;
+ if (fabs(aNewAngle - anAngleAttr->value()) > tolerance)
+ anAngleAttr->setValue(aNewAngle);
+ }
+ // do not need to inform that other parameters were changed in this basis mode: these arguments
+ // change is enough
+ data()->blockSendAttributeUpdated(false, false);
+ return;
+ }
+
+ if (theID == PASSED_POINT_ID()) {
+ data()->blockSendAttributeUpdated(true);
+
+ std::shared_ptr<GeomAPI_Pnt2d> aPoints[3];
+ int aNbInitialized = 0;
+ for (int i = 1; i <= 3; ++i) {
+ std::shared_ptr<GeomDataAPI_Point2D> aCurPnt =
+ std::dynamic_pointer_cast<GeomDataAPI_Point2D>(attribute(POINT_ID(i)));
+ if (aCurPnt->isInitialized())
+ aPoints[aNbInitialized++] = aCurPnt->pnt();
+ }
+
+ if (aNbInitialized == 3) {
+ std::shared_ptr<GeomAPI_Circ2d> aCircle(
+ new GeomAPI_Circ2d(aPoints[0], aPoints[1], aPoints[2]));
+
+ std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCircle->center();
+ if (aCenter) {
+ aCenterAttr->setValue(aCenter);
+ }
+ }
+ data()->blockSendAttributeUpdated(false);
+ return;
+ }
+
+ if (theID == RADIUS_ID()) {
+ if (!aStartAttr->isInitialized() || !anEndAttr->isInitialized() || !aCenterAttr->isInitialized())
+ return;
+ // move center and passed point
+ std::shared_ptr<GeomAPI_Pnt2d> aStart = aStartAttr->pnt();
+ std::shared_ptr<GeomAPI_Pnt2d> anEnd = anEndAttr->pnt();
+ std::shared_ptr<GeomAPI_Pnt2d> aCenter = aCenterAttr->pnt();
+ if (aStart->distance(aCenter) < tolerance || anEnd->distance(aCenter) < tolerance)
+ return;
+ AttributeDoublePtr aRadiusAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
+ data()->attribute(RADIUS_ID()));
+ double aRadius = aRadiusAttr->value();
+
+ data()->blockSendAttributeUpdated(true);
+ std::shared_ptr<GeomAPI_Dir2d> aStartDir(new GeomAPI_Dir2d(aStart->xy()->decreased(aCenter->xy())));
+ std::shared_ptr<GeomAPI_XY> aNewStart = aStartDir->xy()->multiplied(aRadius)->added(aCenter->xy());
+ aStartAttr->setValue(aNewStart->x(), aNewStart->y());
+ std::shared_ptr<GeomAPI_Dir2d> anEndDir(new GeomAPI_Dir2d(anEnd->xy()->decreased(aCenter->xy())));
+ std::shared_ptr<GeomAPI_XY> aNewEnd = anEndDir->xy()->multiplied(aRadius)->added(aCenter->xy());
+ anEndAttr->setValue(aNewEnd->x(), aNewEnd->y());
+ data()->blockSendAttributeUpdated(false);
+ return;
+ }
+ if (theID == ANGLE_ID()) {
+ if (!aStartAttr->isInitialized() || !aCenterAttr->isInitialized())
+ return;
+ AttributeDoublePtr anAngleAttr = std::dynamic_pointer_cast<ModelAPI_AttributeDouble>(
+ data()->attribute(ANGLE_ID()));
+ data()->blockSendAttributeUpdated(true);
+ // move end point and passed point
+ std::shared_ptr<GeomAPI_XY> aCenter = aCenterAttr->pnt()->xy();
+ double anAngle = anAngleAttr->value() * PI / 180.0;
+ double sinA = sin(anAngle);
+ double cosA = cos(anAngle);
+ std::shared_ptr<GeomAPI_XY> aStartDir = aStartAttr->pnt()->xy()->decreased(aCenter);
+ std::shared_ptr<GeomAPI_XY> aDir(new GeomAPI_XY(
+ aStartDir->x() * cosA - aStartDir->y() * sinA,
+ aStartDir->x() * sinA + aStartDir->y() * cosA));
+ anEndAttr->setValue(aCenter->x() + aDir->x(), aCenter->y() + aDir->y());
+ data()->blockSendAttributeUpdated(false);
+ return;