acts-project · paulgessinger · Oct 14, 2025 · Oct 15, 2025 · Oct 15, 2025 · Oct 15, 2025
diff --git a/CI/physmon/reference/simulation/particles_fatras_hist.root b/CI/physmon/reference/simulation/particles_fatras_hist.root
diff --git a/CI/physmon/reference/simulation/particles_geant4_hist.root b/CI/physmon/reference/simulation/particles_geant4_hist.root
diff --git a/CI/physmon/reference/simulation/particles_ttbar_hist.root b/CI/physmon/reference/simulation/particles_ttbar_hist.root
diff --git a/CI/physmon/reference/simulation/vertices_ttbar_hist.root b/CI/physmon/reference/simulation/vertices_ttbar_hist.root
diff --git a/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_seeding.root b/CI/physmon/reference/trackfinding_1muon/orthogonal/performance_seeding.root
diff --git a/CI/physmon/reference/trackfinding_1muon/orthogonal/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_1muon/orthogonal/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfinding_1muon/seeded/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_1muon/seeded/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/seeded/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_1muon/seeded/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/seeded/performance_seeding.root b/CI/physmon/reference/trackfinding_1muon/seeded/performance_seeding.root
diff --git a/CI/physmon/reference/trackfinding_1muon/seeded/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_1muon/seeded/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_seeding.root b/CI/physmon/reference/trackfinding_1muon/truth_estimated/performance_seeding.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_estimated/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_1muon/truth_estimated/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_smeared/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_1muon/truth_smeared/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_smeared/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_1muon/truth_smeared/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_1muon/truth_smeared/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_1muon/truth_smeared/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfinding_4muon_50vertices/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_4muon_50vertices/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_4muon_50vertices/performance_finding_ckf_ambi.root b/CI/physmon/reference/trackfinding_4muon_50vertices/performance_finding_ckf_ambi.root
diff --git a/CI/physmon/reference/trackfinding_4muon_50vertices/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_4muon_50vertices/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_4muon_50vertices/performance_seeding.root b/CI/physmon/reference/trackfinding_4muon_50vertices/performance_seeding.root
diff --git a/...reference/trackfinding_4muon_50vertices/performance_vertexing_amvf_gauss_notime_hist.root b/...reference/trackfinding_4muon_50vertices/performance_vertexing_amvf_gauss_notime_hist.root
diff --git a/...on/reference/trackfinding_4muon_50vertices/performance_vertexing_amvf_grid_time_hist.root b/...on/reference/trackfinding_4muon_50vertices/performance_vertexing_amvf_grid_time_hist.root
diff --git a/...hysmon/reference/trackfinding_4muon_50vertices/performance_vertexing_ivf_notime_hist.root b/...hysmon/reference/trackfinding_4muon_50vertices/performance_vertexing_ivf_notime_hist.root
diff --git a/CI/physmon/reference/trackfinding_4muon_50vertices/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_4muon_50vertices/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf_ambi.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf_ambi.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf_ml_solver.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_finding_ckf_ml_solver.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_fitting_ckf.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_fitting_ckf.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_seeding.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_seeding.root
diff --git a/...smon/reference/trackfinding_ttbar_pu200/performance_vertexing_amvf_gauss_notime_hist.root b/...smon/reference/trackfinding_ttbar_pu200/performance_vertexing_amvf_gauss_notime_hist.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/performance_vertexing_amvf_grid_time_hist.root b/CI/physmon/reference/trackfinding_ttbar_pu200/performance_vertexing_amvf_grid_time_hist.root
diff --git a/CI/physmon/reference/trackfinding_ttbar_pu200/tracksummary_ckf_hist.root b/CI/physmon/reference/trackfinding_ttbar_pu200/tracksummary_ckf_hist.root
diff --git a/CI/physmon/reference/trackfitting_gsf/performance_trackfitting.root b/CI/physmon/reference/trackfitting_gsf/performance_trackfitting.root
diff --git a/CI/physmon/reference/trackfitting_gx2f/performance_trackfitting.root b/CI/physmon/reference/trackfitting_gx2f/performance_trackfitting.root
diff --git a/CI/physmon/reference/trackfitting_kf/performance_trackfitting.root b/CI/physmon/reference/trackfitting_kf/performance_trackfitting.root
diff --git a/CI/physmon/reference/trackrefitting_gsf/performance_trackrefitting.root b/CI/physmon/reference/trackrefitting_gsf/performance_trackrefitting.root
diff --git a/CI/physmon/reference/trackrefitting_kf/performance_trackrefitting.root b/CI/physmon/reference/trackrefitting_kf/performance_trackrefitting.root
diff --git a/CI/physmon/workflows/physmon_trackrefitting_kf.py b/CI/physmon/workflows/physmon_trackrefitting_kf.py
@@ -26,6 +26,7 @@
         outputDir=tp,
         reverseFilteringMomThreshold=float("inf"),
         reverseFilteringCovarianceScaling=100.0,
+        seed=1337,
         s=s,
     )
 

diff --git a/Examples/Framework/src/Framework/RandomNumbers.cpp b/Examples/Framework/src/Framework/RandomNumbers.cpp
@@ -10,6 +10,8 @@
 
 #include "ActsExamples/Framework/AlgorithmContext.hpp"
 
+#include <boost/functional/hash.hpp>
+
 namespace ActsExamples {
 
 RandomNumbers::RandomNumbers(const Config& cfg) : m_cfg(cfg) {}
@@ -20,7 +22,9 @@ RandomEngine RandomNumbers::spawnGenerator(
 }
 
 RandomSeed RandomNumbers::generateSeed(const AlgorithmContext& context) const {
-  return m_cfg.seed + context.eventNumber;
+  std::size_t seed = m_cfg.seed;
+  boost::hash_combine(seed, context.eventNumber);
+  return seed;
 }
 
 }  // namespace ActsExamples
diff --git a/Examples/Python/tests/root_file_hashes.txt b/Examples/Python/tests/root_file_hashes.txt
diff --git a/Examples/Scripts/Python/truth_tracking_kalman.py b/Examples/Scripts/Python/truth_tracking_kalman.py
@@ -19,6 +19,7 @@ def runTruthTrackingKalman(
     decorators=[],
     reverseFilteringMomThreshold=0 * u.GeV,
     reverseFilteringCovarianceScaling=1,
+    seed: int = 42,
     s: acts.examples.Sequencer = None,
 ):
     from acts.examples.simulation import (
@@ -45,7 +46,7 @@ def runTruthTrackingKalman(
     for d in decorators:
         s.addContextDecorator(d)
 
-    rnd = acts.examples.RandomNumbers(seed=42)
+    rnd = acts.examples.RandomNumbers(seed=seed)
     outputDir = Path(outputDir)
 
     logger = acts.logging.getLogger("Truth tracking example")

diff --git a/Examples/Scripts/Python/truth_tracking_kalman_refitting.py b/Examples/Scripts/Python/truth_tracking_kalman_refitting.py
@@ -19,6 +19,7 @@ def runRefittingKf(
     energyLoss: bool = True,
     reverseFilteringMomThreshold=0 * u.GeV,
     reverseFilteringCovarianceScaling=1.0,
+    seed: int = 42,
     s: acts.examples.Sequencer = None,
 ):
     s = runTruthTrackingKalman(
@@ -28,6 +29,7 @@ def runRefittingKf(
         outputDir=outputDir,
         reverseFilteringMomThreshold=reverseFilteringMomThreshold,
         reverseFilteringCovarianceScaling=reverseFilteringCovarianceScaling,
+        seed=seed,
         s=s,
     )