- Slvs_Constraint aConstraint = myStorage->getConstraint(mySlvsConstraints.front());
-
- bool isFixed[2][2];
- std::shared_ptr<GeomAPI_Pnt2d> aPoints[2][2]; // start and end points of lines
- Slvs_hConstraint aFixedConstraint;
- Slvs_hEntity anEnt[2] = {aConstraint.entityA, aConstraint.entityB};
- for (int i = 0; i < 2; i++) {
- const Slvs_Entity& aLine = myStorage->getEntity(anEnt[i]);
- double aCoef = -1.0;
- for (int j = 0; j < 2; j++, aCoef += 2.0) {
- const Slvs_Entity& aPoint = myStorage->getEntity(aLine.point[j]);
- double aCoords[2];
- for (int k = 0; k < 2; k++)
- aCoords[k] = myStorage->getParameter(aPoint.param[k]).val;
- isFixed[i][j] = myStorage->isPointFixed(aPoint.h, aFixedConstraint, true);
- aPoints[i][j] = std::shared_ptr<GeomAPI_Pnt2d>(new GeomAPI_Pnt2d(aCoords[0], aCoords[1]));
- }
- }
-
- std::shared_ptr<GeomAPI_Lin2d> aLine[2] = {
- std::shared_ptr<GeomAPI_Lin2d>(new GeomAPI_Lin2d(aPoints[0][0], aPoints[0][1])),
- std::shared_ptr<GeomAPI_Lin2d>(new GeomAPI_Lin2d(aPoints[1][0], aPoints[1][1]))
- };
- std::shared_ptr<GeomAPI_Pnt2d> anIntersection = aLine[0]->intersect(aLine[1]);
- if (!anIntersection)
- return;
- double aDist[2][2];
- for (int i = 0; i < 2; i++) {
- for (int j = 0; j < 2; j++)
- aDist[i][j] = anIntersection->distance(aPoints[i][j]);
- if (aDist[i][0] > tolerance && aDist[i][1] > tolerance &&
- aDist[i][0] + aDist[i][1] < aPoints[i][0]->distance(aPoints[i][1]) + 2.0 * tolerance) {
- // the intersection point is an inner point of the line,
- // we change the sign of distance till start point to calculate correct coordinates
- // after rotation
- aDist[i][0] *= -1.0;
- }
- }
- std::shared_ptr<GeomAPI_Dir2d> aDir[2];
- for (int i = 0; i < 2; i++)
- if (aDist[i][1] > fabs(aDist[i][0]))
- aDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(
- aPoints[i][1]->xy()->decreased(anIntersection->xy())));
- else {
- aDir[i] = std::shared_ptr<GeomAPI_Dir2d>(new GeomAPI_Dir2d(
- aPoints[i][0]->xy()->decreased(anIntersection->xy())));
- // main direction is opposite => change signs
- aDist[i][0] *= -1.0;
- aDist[i][1] *= -1.0;
- }
-
- aConstraint.other = false;
- for (int i = 0; i < 2; i++)
- if (aLine[i]->direction()->dot(aDir[i]) < 0.0)
- aConstraint.other = !aConstraint.other;
- myStorage->updateConstraint(aConstraint);
-
- bool isChanged = fabs(myAngle - aConstraint.valA) > aTol;
- // myAngle should be updated even if the angle of constraint is changed too little
- myAngle = aConstraint.valA;
- if (!isChanged)
- return; // the angle was not changed, no need to recalculate positions of lines
-
- if (isFixed[0][0] && isFixed[0][1] && isFixed[1][0] && isFixed[1][1])
- return; // both lines are fixed => no need to update them
-
- // Recalculate positions of lines to avoid conflicting constraints
- // while changing angle value several times
- double cosA = cos(myAngle * PI / 180.0);
- double sinA = sin(myAngle * PI / 180.0);
- if (aDir[0]->cross(aDir[1]) < 0.0)
- sinA *= -1.0;
- int aLineToUpd = 1;
- if (isFixed[1][0] && isFixed[1][1]) {
- sinA *= -1.0;
- aLineToUpd = 0;
- }
- double x = aDir[1-aLineToUpd]->x() * cosA - aDir[1-aLineToUpd]->y() * sinA;
- double y = aDir[1-aLineToUpd]->x() * sinA + aDir[1-aLineToUpd]->y() * cosA;
-
- std::shared_ptr<GeomAPI_Pnt2d> aNewPoints[2];
- for (int i = 0; i < 2; i++) {
- aNewPoints[i] = std::shared_ptr<GeomAPI_Pnt2d>(
- new GeomAPI_Pnt2d(anIntersection->x() + x * aDist[aLineToUpd][i],
- anIntersection->y() + y * aDist[aLineToUpd][i]));
- }
-
- std::shared_ptr<GeomAPI_XY> aDelta;
- if (isFixed[aLineToUpd][0] && !isFixed[aLineToUpd][1])
- aDelta = aPoints[aLineToUpd][0]->xy()->decreased(aNewPoints[0]->xy());
- else if (!isFixed[aLineToUpd][0] && isFixed[aLineToUpd][1])
- aDelta = aPoints[aLineToUpd][1]->xy()->decreased(aNewPoints[1]->xy());
- if (aDelta) {
- for (int i = 0; i < 2; i++) {
- aNewPoints[i]->setX(aNewPoints[i]->x() + aDelta->x());
- aNewPoints[i]->setY(aNewPoints[i]->y() + aDelta->y());
- }
- }
-
- // Update positions of points
- const Slvs_Entity& anUpdLine = myStorage->getEntity(anEnt[aLineToUpd]);
- Slvs_Param aParam;
- for (int i = 0; i < 2; i++) {
- const Slvs_Entity& aPoint = myStorage->getEntity(anUpdLine.point[i]);
- aParam = myStorage->getParameter(aPoint.param[0]);
- aParam.val = aNewPoints[i]->x();
- myStorage->updateParameter(aParam);
- aParam = myStorage->getParameter(aPoint.param[1]);
- aParam.val = aNewPoints[i]->y();
- myStorage->updateParameter(aParam);
- }