histogram_monitor.py

#!/usr/bin/env python3
 
 
 
# Creates two histograms and adds them to the 'Histogram' tab in the display
# Doubleclicking them will show them in the current canvas (added on
# the right side of the screen) and keep them updated each event.
 
import basf2 as b2
 
from ROOT import Belle2
from ROOT import TH1F
from ROOT import TH3F
 
 
class GenerateHist(b2.Module):
    """Generate some histograms to pass to the display."""
 
    
    edep_hist = TH1F("CDC_edep", "Energy deposition from CDCSimHits", 100, 0.0, 10e-6)
    
    pos_hist = TH3F("CDC_pos", "Positions of CDCSimHits",
                    100, -150.0, 150.0,
                    100, -150.0, 150.0,
                    100, -150.0, 150.0)
 
    def initialize(self):
        """reimplementation of Module::initialize()."""
 
        Belle2.PyStoreObj("DisplayData").registerInDataStore()
 
    def event(self):
        """reimplementation of Module::event()."""
 
        displayData = Belle2.PyStoreObj("DisplayData")
        displayData.create()
 
        cdcsimhits = Belle2.PyStoreArray("CDCSimHits")
        for hit in cdcsimhits:
            self.edep_hist.Fill(hit.getEnergyDep())
            p = hit.getPosWire()
            self.pos_hist.Fill(p.X(), p.Y(), p.Z())
 
        displayData.obj().addHistogram("CDC_edep", self.edep_hist)
        displayData.obj().addHistogram("CDC_pos", self.pos_hist)
 
 
# register necessary modules
eventinfosetter = b2.register_module('EventInfoSetter')
eventinfosetter.param('evtNumList', [500])
 
 
# create geometry
gearbox = b2.register_module('Gearbox')
geometry = b2.register_module('Geometry')
geometry.param('components', ['CDC', 'MagneticField'])
 
particlegun = b2.register_module('ParticleGun')
 
# simulation
g4sim = b2.register_module('FullSim')
# make the simulation less noisy
g4sim.logging.log_level = b2.LogLevel.ERROR
 
# create paths
main = b2.create_path()
 
# add modules to paths
main.add_module(eventinfosetter)
 
main.add_module(gearbox)
main.add_module(geometry)
main.add_module(particlegun)
main.add_module(g4sim)
 
main.add_module(GenerateHist())
 
# default parameters
display = b2.register_module('Display')
main.add_module(display)
 
b2.process(main)
print(b2.statistics)