From 917eeecefdea74eb04736989993c728569b40069 Mon Sep 17 00:00:00 2001
From: Benjamin Huth <37871400+benjaminhuth@users.noreply.github.com>
Date: Wed, 1 Feb 2023 17:04:12 +0100
Subject: [PATCH] refactor: Suppress large printout of Geant4 (#1791)

This PR suppresses the large printout of physics parameters at the beginning of each Sequencer run by default.
---
 Examples/Algorithms/Geant4/src/Geant4Simulation.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Examples/Algorithms/Geant4/src/Geant4Simulation.cpp b/Examples/Algorithms/Geant4/src/Geant4Simulation.cpp
index 3624dd33a9a..560ac994c7d 100644
--- a/Examples/Algorithms/Geant4/src/Geant4Simulation.cpp
+++ b/Examples/Algorithms/Geant4/src/Geant4Simulation.cpp
@@ -17,7 +17,10 @@
 #include <iostream>
 #include <stdexcept>
 
+#include <G4EmParameters.hh>
 #include <G4FieldManager.hh>
+#include <G4HadronicParameters.hh>
+#include <G4HadronicProcessStore.hh>
 #include <G4MagneticField.hh>
 #include <G4RunManager.hh>
 #include <G4TransportationManager.hh>
@@ -29,6 +32,7 @@
 #include <G4UserTrackingAction.hh>
 #include <G4VUserDetectorConstruction.hh>
 #include <G4VUserPhysicsList.hh>
+#include <G4Version.hh>
 
 namespace {
 /// Helper method to add the user actions
@@ -84,6 +88,13 @@ ActsExamples::Geant4Simulation::Geant4Simulation(
   G4EventManager::GetEventManager()->GetStackManager()->SetVerboseLevel(
       geantVerboseLevel);
 
+  // Suppress the printing of physics information.
+#if G4VERSION_NUMBER >= 1100
+  G4HadronicParameters::Instance()->SetVerboseLevel(0);
+  G4HadronicProcessStore::Instance()->SetVerbose(0);
+  G4EmParameters::Instance()->SetIsPrintedFlag(true);
+#endif
+
   // Set the detector construction
   m_cfg.runManager->SetUserInitialization(m_cfg.detectorConstruction);