13 :
MagVolume(pos,rot,shape,mfp), theFaces(faces), theZmin(0.), theZmax(0.), theInnerR(0.), theOuterR(0.)
MagCylinder(const PositionType &pos, const RotationType &rot, DDSolidShape shape, const std::vector< VolumeSide > &faces, const MagneticFieldProvider< float > *mfp)