if (!mSlicerManager) return;
for(int i=0; i<mSlicerManager->GetNumberOfSlicers(); i++) {
UpdateSlice(i, mSlicerManager->GetSlicer(i)->GetSlice(), force);
if (!mSlicerManager) return;
for(int i=0; i<mSlicerManager->GetNumberOfSlicers(); i++) {
UpdateSlice(i, mSlicerManager->GetSlicer(i)->GetSlice(), force);