From d47027f4e33687ff00d234fb2d52112047672d68 Mon Sep 17 00:00:00 2001
From: Sylvain Joube <40246406+SylvainJoube@users.noreply.github.com>
Date: Sun, 14 Apr 2024 08:25:27 +0200
Subject: [PATCH] Fix ambiguity resolution algorithm: add unique measurement_id
 (#536)

* Fix ambiguity resolution: unique measurement_id

* Get measurement_id with measurements.size()
---
 .../clusterization/detail/measurement_creation_helper.hpp      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/include/traccc/clusterization/detail/measurement_creation_helper.hpp b/core/include/traccc/clusterization/detail/measurement_creation_helper.hpp
index d8bb2b1f37..06e83ba064 100644
--- a/core/include/traccc/clusterization/detail/measurement_creation_helper.hpp
+++ b/core/include/traccc/clusterization/detail/measurement_creation_helper.hpp
@@ -115,6 +115,9 @@ TRACCC_HOST inline void fill_measurement(
                                 pitch[1] * pitch[1] / static_cast<scalar>(12.)};
         // @todo add variance estimation
 
+        // For the ambiguity resolution algorithm, give a unique measurement ID
+        m.measurement_id = measurements.size();
+
         measurements.push_back(std::move(m));
     }
 }