Download the most recent sources:
http://proj-clhep.web.cern.ch/proj-clhep/DISTRIBUTION/
and install it according to the manual:
http://proj-clhep.web.cern.ch/proj-clhep/INSTALLATION/clhep-2.0.html
Download Geant4 (at least version 4.9.6):
http://geant4.web.cern.ch/geant4/support/download.shtml
Install it using the cmake-way according to this manual:
http://geant4.web.cern.ch/geant4/UserDocumentation/UsersGuides/InstallationGuide/html/ch04.html
Make sure to enable Qt support if you would like to use the GUI:
cmake -DGEANT4_USE_QT=ON ../geant4.9.6
Download the data files for measured optical surface reflectance:
http://geant4.web.cern.ch/geant4/support/download.shtml
and place its contents in the appropriate location
if you chose the default prefix (change according to your prefix setting)
Check out the current version:
svn checkout https://svn.code.sf.net/p/scintillate/code/trunk/scintillate scintillate
If you would like to use the GUI, edit scintillate.pro and enable QT+=gui.
Compile it:
cd scintillate
qmake
make
And start it:
export G4LEDATA=/usr/share/Geant4-9.6.1/data/G4EMLOW6.32 \
G4REALSURFACEDATA=/usr/share/Geant4-9.6.1/data/RealSurface1.0 \
./scintillate