|Message: Re: Quadrupole magnetic field||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
Peterís answer is correct. All the current magnetic fields in Geant4 refer to the global reference frame. John =================================================== John Apostolakis, PH Department, CERN > On 05 May 2015, at 22:36, Gumplinger Peter <firstname.lastname@example.org> wrote: > > > *** Discussion title: Fields: Magnetic and Otherwise > >> G4QuadrupoleMagField *Quad = new G4QuadrupoleMagField( G4double >> pGradient, G4ThreeVector pOrigin , G4RotationMatrix* pMatrix) >> >> My question is whether "pOrigin" is in mother volume coordinate system >> or in local coordinate frame ? > > Please, see: > > http://www-geant4.kek.jp/lxr/source/geometry/magneticfield/src/G4QuadrupoleMagField.cc#L76 > > It seems 'pOrigin' are the coordinates of the magnet centre in the > global reference frame. > > ------------------------------------------------------------- > Visit this GEANT4 at hypernews.slac.stanford.edu message (to reply or unsubscribe) at: > http://hypernews.slac.stanford.edu/HyperNews/geant4/get/emfields/226/1.html