From f9c8106b406f30026ae79dcf259c3ad0429506a9 Mon Sep 17 00:00:00 2001
From: lintao <lintao51@gmail.com>
Date: Thu, 21 Jan 2021 22:23:04 +0800
Subject: [PATCH] WIP: as the random seed will be reset in the initialization
of Gaudi's HEP random engine, we need to set the seed again.
---
Simulation/DetSimCore/src/DetSimAlg.cpp | 11 +++++++++++
Simulation/DetSimCore/src/DetSimAlg.h | 2 ++
2 files changed, 13 insertions(+)
diff --git a/Simulation/DetSimCore/src/DetSimAlg.cpp b/Simulation/DetSimCore/src/DetSimAlg.cpp
index 31583d82..ae8d5506 100644
--- a/Simulation/DetSimCore/src/DetSimAlg.cpp
+++ b/Simulation/DetSimCore/src/DetSimAlg.cpp
@@ -2,12 +2,14 @@
#include "GaudiKernel/IEventProcessor.h"
#include "GaudiKernel/IAppMgrUI.h"
#include "GaudiKernel/GaudiException.h"
+#include "GaudiKernel/IRndmEngine.h"
#include "G4RunManager.hh"
#include "G4UImanager.hh"
#include "G4VisExecutive.hh"
#include "G4UIExecutive.hh"
+#include "Randomize.hh"
#include "DetectorConstruction.h"
#include "G4PhysListFactory.hh"
#include "G4EmParameters.hh"
@@ -30,6 +32,15 @@ DetSimAlg::initialize() {
info() << "Initialize DetSimAlg... " << endmsg;
+ // Initialize random seed
+ if (not m_randomSeeds.empty()) {
+ randSvc()->engine()->setSeeds( m_randomSeeds );
+ }
+
+ info() << "Random Seed is initialized to "
+ << G4Random::getTheSeed()
+ << " in Geant4" << std::endl;
+
m_detsimsvc = service("DetSimSvc");
if (!m_detsimsvc) {
error() << "Failed to find DetSimSvc. " << endmsg;
diff --git a/Simulation/DetSimCore/src/DetSimAlg.h b/Simulation/DetSimCore/src/DetSimAlg.h
index 36646d9e..bb4571c7 100644
--- a/Simulation/DetSimCore/src/DetSimAlg.h
+++ b/Simulation/DetSimCore/src/DetSimAlg.h
@@ -31,6 +31,8 @@ private:
private:
+ Gaudi::Property<std::vector<long>> m_randomSeeds{this, "RandomSeeds", {}};
+
Gaudi::Property<std::vector<std::string>> m_run_macs{this, "RunMacs"};
Gaudi::Property<std::vector<std::string>> m_run_cmds{this, "RunCmds"};
Gaudi::Property<std::vector<std::string>> m_vis_macs{this, "VisMacs"};
--
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