Visualization I: Hands-on

We will keep using the example from the previous, 'User Interface I' lecture 
under 'G4WORKDIR/TaskC'.

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A.:

We will keep using the example B1 application in INTERACTIVE mode but we will 
change the previously set C-shell("tcsh") character terminal interface to the Qt
Graphical User Interface (GUI). Note, that we will use the application WITHOUT 
any VISUALISATION at this point (see TaskC1 at the User Interface I Hands-On).

Set the "Qt" Graphical User Interface as requested session, rebuild the 
application and run in interactive mode. 
 - see the differences compared to the C-shell like terminal
 - initilaize and execute the application with default settings 

Solution:
  
  1. change (line #55 in 'exampleB1.cc'): 
    
    ui = new G4UIExecutive(argc, argv, "tcsh"); 
    to 
    ui = new G4UIExecutive(argc, argv, "Qt");
  
  2. rebuild the application and run in interactive mode:
  
    > cd $G4WORKDIR/TaskC/B1/build 
    > make 
    > ./exampleB1
    
  3. run the simulation with default settings with 10 events (commands in the 
     session window):
  
    > /run/initialize
    > /run/beamOn 
  
  4. execute the 'run1.mac' file:
  
    > /control/execute run1.mac

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B.:
Activate the visualization, without executing the "init_vis.mac" macro file, 
build the application and execute in interactive mode (notice the 'vis' command 
directory in the 'Help' menu !!!). 
  
  > ./exampleB1
  
Initialize the application and open the OpenGL visualization driver and draw 
the geometry. Make the 'World' invisible, the 'Evelope' colour to blue with 
some transparency. View the object with their surface (set the viewer style to
surface view) and add coordinate axes (use the search box of the helper to 
find out how to add axes). 

Solution(commands in the session window):   
  
  > /run/initialize
  > /vis/open OGL
  > /vis/drawVolume
###  > /vis/geometry/list
  > /vis/geometry/set/visibility World 0  false
  > /vis/geometry/set/colour Envelope 0  0 0 255 0.3
  > /vis/viewer/set/style surface 
  > /vis/scene/add/axes 
  

Add trajectories (smooth type) to your visualization and run the application 
with 100 events. Then change the settings to see all trajectories of the run (
up to # 1000) and re-run.

Solution(commands in the session window):   

  > /vis/scene/add/trajectories smooth
  > /run/beamOn 100
  > /vis/scene/endOfEventAction accumulate 1000
  > /run/beamOn 100
  
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C.:
Exit the application and re-run in interactive mode. Initialize the application 
then execute the "vis.mac" file.