- const std::shared_ptr<GeomAPI_Ax3>& thePlane)
-{
- std::shared_ptr<GeomAPI_AISObject> aAISObj = AISObjectPtr(new GeomAPI_AISObject());
- Handle(SketcherPrs_HVDirection) aPrs = new SketcherPrs_HVDirection(theConstraint, thePlane, true);
- aAISObj->setImpl(new Handle(AIS_InteractiveObject)(aPrs));
- return aAISObj;
+ const std::shared_ptr<GeomAPI_Ax3>& thePlane,
+ AISObjectPtr thePrevious)
+{
+ std::shared_ptr<GeomAPI_AISObject> anAISObj;
+ if (SketcherPrs_HVDirection::IsReadyToDisplay(theConstraint, thePlane)) {
+ if (thePrevious.get())
+ anAISObj = thePrevious;
+ else {
+ anAISObj = AISObjectPtr(new GeomAPI_AISObject());
+ Handle(SketcherPrs_HVDirection) aPrs = new SketcherPrs_HVDirection(theConstraint, thePlane, true);
+ anAISObj->setImpl(new Handle(AIS_InteractiveObject)(aPrs));
+ }
+ }
+ return anAISObj;