Don't rely on the engine to set the current track after popping from
TMCManagerStack but do it implicitly.

'wmat' values were not updated when the function is called with nlmat<0, as they
should be to mimic the Geant3 behavior.

- Only rely on presence of TMCManager in multi run (PR#6 in vmc-project/vmc)
- Withdraw unwanted TMCVerbose modifications to avoid changes in the tests outputs
- Recover TGeoManager::fIsOutside for transfer tracks (PR#3 in vmc-project/vmc)

This function is needed for newly introduced sensitive detectors framework
to provide a hook for a central call to fill ROOT trees before resetting data
in sensitive detector's end of event.

The index of the geometry state belonging to a track is now reset
properly when the TMCManagerStack is notified on the restored geometry.

This is an extension allowing the VMC package to run a simulation
with multiple different engines at a time. Tracks can be transferred
among engines during a simulation run based on conditions specified by
the user.

Important notes on the extensions:
  1) This extension preserves backward-compatibility in the sense that
     user code relying on the former version of VMC is still running
     with the extended version. Was tested with GEANT3_VMC@v2-6 and
     GEANT4_VMC@v3-6-p1.
  2) A shared simulation is only possible when TGeo is used for geometry
     construction and navigation.
  3) A TMCManager singleton object is responsible for handling multiple
     engines and can be obtained on request calling
     TVirtualMCApplication::RequestManager() during construction of the
     user application class.
  4) The introduced TMCParticleStatus objects hold additional
     information to keep track of properties when a track is transferred
     between engines.
  5) When a track is interrupted in one engine to be transferred to
     another, the geometry state is cached in the form of a
     TGeoBranchArray object. It will be used to initialize the navigator
     when this track is picked up for further transport in the next
     engine. This is especially useful/required when a track is
     transferred at a volume boundary in order to be picked up in the
     entered volume and not in the one just left. This is a main reason
     why geometry management is forced to be done via TGeo.

A more comprehensive introduction concerning the usage and
implementation in the user code can be found in the
montecarlo/vmc/README.md

Further note:
  This commit also applies the clang format to the modified and new
  files.

Details:
- Added support for user defined sensitive detectors
  o TVirtualMCSensitiveDetector: the interface class for a user sensitive detector
  o New functions in TVirtualMC:
     void SetSensitiveDetector(const TString &volName, TVirtualMCSensitiveDetector *sd);
     TVirtualMCSensitiveDetector *GetSensitiveDetector(const TString &volName) const;
     void SetExclusiveSDScoring(Bool_t exclusiveSDScoring);
  o New function in TVirtualMCApplication:
     void ConstructSensitiveDetectors();
- Added new TVirtualMC::NIELEdep() function
- Removed default implementation for  TVirtualMC::TrackPosition/Momentum with Float_t arguments

ClassImp is a macro defined in Rtypes.h. It can be written without trailing
semicolon. However, clang-format is based on lexing and it doesn't know at
all about preprocessors and how to expand macros. When visiting ClassImp(X)
it thinks this is not a completed entity (as it doesn't expand macros) and
considers the next line as continuation of the previous.

Inserting a semicolon fixes the issue and makes formatting with clang-format
in the ROOT codebase less tricky.

(previously distributed in geant4_vmc/mtroot)

- Make TVirtualMC::GetMC() inlined and the getters accessing data members non-virtual.

(according to Geant4 tls.hh and G4Threading.hh)

git-svn-id: http://root.cern.ch/svn/root/trunk@44794 27541ba8-7e3a-0410-8455-c3a389f83636

  using namespace std;
from Riostream.h, which has huge consequences for all of ROOT.
Riostream.h is now a simple wrapper for fstream, iostream, iomanip for backward compatibility; Riosfwd.h simply wraps iosfwd.

Because of templates and their inline functions, Riostream.h needed to be included in headers, too (e.g. TParameter.h), which violated the assumption that Riostream.h is not exposing its using namespace std to headers.
ROOT now requires R__ANSISTREAM, R__SSTREAM, which does not change the set of supported compilers.

Without "using namespace std", several identifiers are now prefixed by std::; e.g. roofit/* source files now have a using namespace std to keep their coding style.
TFile::MakeProject() now generates "using namespace std" to convert the CINT-style class names into C++ ones.


git-svn-id: http://root.cern.ch/svn/root/trunk@44507 27541ba8-7e3a-0410-8455-c3a389f83636

Making TVirtualMC and TVirtualMCApplication instances thread local;
behind #if defined(__linux__) && !defined(__CINT__)


git-svn-id: http://root.cern.ch/svn/root/trunk@43453 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@41330 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@36585 27541ba8-7e3a-0410-8455-c3a389f83636

Make sure that TGeoManager exists before each call to gGeoManager
(call gGeoManager via a function which performs a test). 
This fixes a crash in VMC examples when the VMC application builds geometry via TVirtualMC and then selects TGeant3TGeo as MC.


git-svn-id: http://root.cern.ch/svn/root/trunk@34810 27541ba8-7e3a-0410-8455-c3a389f83636

git-svn-id: http://root.cern.ch/svn/root/trunk@34204 27541ba8-7e3a-0410-8455-c3a389f83636

Replace all references to Text_t by char, still keeping the definition in Rtypes.h


git-svn-id: http://root.cern.ch/svn/root/trunk@27157 27541ba8-7e3a-0410-8455-c3a389f83636

there is added setter/getter for TVirtualMagField
in TVirtualMC.
If the field object is set, the MCApplication::Field
is not used, if not, it is used as before, but there is issued
a warning that MCApplication::Field is now deprecated and user
should move to TVirtualMagField.
There is also included a correction in the new classes
headers, as there was a problem in compilation when using
include of uniform field. And added a setter/getter for
the field value in uniform field.


git-svn-id: http://root.cern.ch/svn/root/trunk@27106 27541ba8-7e3a-0410-8455-c3a389f83636

eg, g4root, pythia6, pythia8, vmc


git-svn-id: http://root.cern.ch/svn/root/trunk@23136 27541ba8-7e3a-0410-8455-c3a389f83636