Hands-on

Code for download: session4_start.tar.gz

Hands-on 4a:

Explore processes defined for proton, e-, e+, gamma particles via UI commands and add these commands in run.mac. * Hint: See the commands /particle/select and /particle/process/*

In the main() function, replace the explicit creation of the FTFP_BERT physics list with the use of the physics list factory, G4PhysListFactory.

Hands-on 4b:

Add a command line option to select any Geant4 physics list using G4PhysListFactory class when starting the example application, for example:
```
./exampleED -p FTFP_BERT_EMV
```
- The command line options were already added in the main() function. See the documentation for the basic example B4 , where use of a similar code is described in the section “How to run”.
Check the availability of the physics list via G4bool IsReferencePhysList(const G4String& physListName); in the main function
Test the added option and run the program both interactivel and in batch mode.

Hands-on 4c:

Inspect the implementation of a command using G4GenericMessenger in the EventAction class, execute the command to inactivate verbose mode and run a new event
Implement a command to activate or inactivate the randomizing of the particle direction in the primary generator action using G4GenericMessenger in an analogous way as the command in EventAction
- Add a G4GenericMessenger object in PrimaryGeneratorAction
- Call its DeclareProperty method to create setRandomize command associated with already existing data member fRandomize of a G4bool type

Hands-on 4d:

Add a menu in GUI using the command line interface

Add a menu “View” in the toolbar (on Apple computers, the menu bar is always at the top of the screen)
In this “View” menu, add two buttons for setting the viewPoint at Theta/Phi (0,0) and (90,0)
In this “View” menu, add a button for setting a viewPoint and ask for the Theta/Phi values (define a command without parameters)