- Handle(Prs3d_Drawer) aDrawer = anAIS->Attributes();
- if (fabs(aDrawer->DeviationCoefficient() - theDeflection) > Precision::Confusion()) {
- aDrawer->SetDeviationCoefficient(theDeflection);
- isModified = true;
+ Handle(AIS_Shape) anAISShape = Handle(AIS_Shape)::DownCast(anAIS);
+ if (!anAISShape.IsNull()) {
+ Standard_Real aCoefficient, aPreviousCoefficient;
+ anAISShape->OwnDeviationCoefficient(aCoefficient, aPreviousCoefficient);
+ if (fabs(aCoefficient-theDeflection) > Precision::Confusion()) {
+ isModified = true;
+ anAISShape->SetOwnDeviationCoefficient(theDeflection);
+ // redisplay is necessary here to update presentation in all modes
+ // Standard True flag. Displayer uses Standard False flag. If it will be changed in
+ // displayer, redisplay here will not be necessary. But performance should be checked.
+ anAISShape->Redisplay(Standard_True);
+ }