+
+ if (aGeomPntA.get() && aGeomPntB.get()) {
+ aDistance = aGeomPntA->distance(aGeomPntB);
+ if (aDistance < tolerance)
+ aDistance = 0.0;
+ }
+
+ // keep the direction between arguments for processing of the zero distance
+ std::shared_ptr<GeomDataAPI_Dir> aPointPointDir =
+ std::dynamic_pointer_cast<GeomDataAPI_Dir>(attribute(DIRECTION_ID()));
+ if (aDistance > tolerance)
+ aPointPointDir->setValue(aGeomPntB->x() - aGeomPntA->x(), aGeomPntB->y() - aGeomPntA->y(), 0.0);
+ else if (aLine) {
+ GeomDir2dPtr aLineDir = aLine->direction();
+ aPointPointDir->setValue(-aLineDir->y(), aLineDir->x(), 0.0);
+ }
+