From d58a3ce1f548ffe51cda77d01f2802b62f9a8041 Mon Sep 17 00:00:00 2001
From: Beomki Yeo <beomki.yeo@gmail.com>
Date: Fri, 13 Dec 2024 06:31:13 -0800
Subject: [PATCH] Backup

---
 .../include/traccc/fitting/kalman_filter/kalman_fitter.hpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/include/traccc/fitting/kalman_filter/kalman_fitter.hpp b/core/include/traccc/fitting/kalman_filter/kalman_fitter.hpp
index 0df5ab6c5..1a90bf546 100644
--- a/core/include/traccc/fitting/kalman_filter/kalman_fitter.hpp
+++ b/core/include/traccc/fitting/kalman_filter/kalman_fitter.hpp
@@ -254,6 +254,11 @@ class kalman_fitter {
 
         } else {
 
+            // @NOTE: There is no backward filter in RTS smoother so there
+            // is no backward chi2 either. We just put the forward chi2 into
+            // backward chi2 for the pvalue test
+            last.backward_chi2() = last.filtered_chi2();
+
             for (typename vector_type<
                      track_state<algebra_type>>::reverse_iterator it =
                      track_states.rbegin() + 1;
@@ -264,6 +269,8 @@ class kalman_fitter {
                                                   it->surface_link()};
                 sf.template visit_mask<gain_matrix_smoother<algebra_type>>(
                     *it, *(it - 1));
+
+                it->backward_chi2() = it->filtered_chi2();
             }
         }
     }