From 5a478efff9c5d62d4317051e7dc1a5209ca007b6 Mon Sep 17 00:00:00 2001
From: Barak Schmookler <bschmookler1@gmail.com>
Date: Thu, 11 Jan 2024 10:07:39 -0500
Subject: [PATCH] Small change to phi difference calculation in seed charge
 determination

---
 src/algorithms/tracking/TrackSeeding.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/algorithms/tracking/TrackSeeding.cc b/src/algorithms/tracking/TrackSeeding.cc
index e0e06058fa..255dbef985 100644
--- a/src/algorithms/tracking/TrackSeeding.cc
+++ b/src/algorithms/tracking/TrackSeeding.cc
@@ -270,8 +270,8 @@ int eicrecon::TrackSeeding::determineCharge(std::vector<std::pair<float,float>>&
   const auto firstphi = atan2(firstpos.second, firstpos.first);
   const auto secondphi = atan2(secondpos.second, secondpos.first);
   auto dphi = secondphi - firstphi;
-  if(dphi > M_PI) dphi = 2.*M_PI - dphi;
-  if(dphi < -M_PI) dphi = 2*M_PI + dphi;
+  if(dphi > M_PI) dphi -= 2.*M_PI;
+  if(dphi < -M_PI) dphi += 2*M_PI;
   if(dphi < 0) charge = -1;
 
   return charge;