From fc68c5980b5e052dfd4b69c25d46be42a88f7a5a Mon Sep 17 00:00:00 2001
From: Andreas Stefl <stefl.andreas@gmail.com>
Date: Thu, 15 Feb 2024 12:07:29 +0100
Subject: [PATCH] refactor: Set common initial covariance for vertex fitting
 (#2947)

Values take from https://github.com/acts-project/acts/blob/19464fa0d24f031083ef3ad3108b74f2b5fa5454/Examples/Algorithms/Vertexing/src/AdaptiveMultiVertexFinderAlgorithm.cpp#L137
---
 .../ActsExamples/Vertexing/VertexFitterAlgorithm.hpp      | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Examples/Algorithms/Vertexing/include/ActsExamples/Vertexing/VertexFitterAlgorithm.hpp b/Examples/Algorithms/Vertexing/include/ActsExamples/Vertexing/VertexFitterAlgorithm.hpp
index 4ef00347372..2abbe4aec89 100644
--- a/Examples/Algorithms/Vertexing/include/ActsExamples/Vertexing/VertexFitterAlgorithm.hpp
+++ b/Examples/Algorithms/Vertexing/include/ActsExamples/Vertexing/VertexFitterAlgorithm.hpp
@@ -68,10 +68,10 @@ class VertexFitterAlgorithm final : public IAlgorithm {
     Acts::Vector4 constraintPos = Acts::Vector4(0, 0, 0, 0);
     /// Vertex constraint covariance matrix
     Acts::SquareMatrix4 constraintCov =
-        Acts::Vector4(3 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
-                      3 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
-                      10 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
-                      1 * Acts::UnitConstants::ns * Acts::UnitConstants::ns)
+        Acts::Vector4(1e2 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
+                      1e2 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
+                      1e2 * Acts::UnitConstants::mm * Acts::UnitConstants::mm,
+                      1e8 * Acts::UnitConstants::mm * Acts::UnitConstants::mm)
             .asDiagonal();
   };