# Topic 1 : CaTS
CaTS is  flexible and extend-able framework based on Geant4 and ROOT for the simulation
of calorimeter and tracking detectors. It is intended to become a Geant4 advanced example,
also (optionally) demonstrating the use of the Opticks package for accelerating optical 
photon creation, propagation, and scoring on NVidia GPUs.

Development has already used some modern C++ features such as brace initialization and
default cons/destructors. The goal in the hackathon would be a review to find further
areas where modern C++ features could be used to achieve better and more readable code.

- CaTS: https://github.com/hanswenzel/CaTS
- Opticks: https://github.com/simoncblyth/opticks