transformer.Local2Global((11+ich)*100+GetDetElemId(), xloc, yloc, 0, xglo, yglo, zglo);
minX = TMath::Min(minX,(xglo-dx));
maxX = TMath::Max(maxX,(xglo+dx));
transformer.Local2Global((11+ich)*100+GetDetElemId(), xloc, yloc, 0, xglo, yglo, zglo);
minX = TMath::Min(minX,(xglo-dx));
maxX = TMath::Max(maxX,(xglo+dx));