From 125a0d60416973ad91096cf2fec7513f89cd2ff1 Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Fri, 10 Jan 2025 09:16:17 +0000
Subject: [PATCH] A trivial fix for the data set, but does not work when the
 face normals are slightly perturbed

---
 .../include/CGAL/Polygon_mesh_processing/compute_normal.h      | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/compute_normal.h b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/compute_normal.h
index dd77b2e98435..d1bf35fc630a 100644
--- a/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/compute_normal.h
+++ b/Polygon_mesh_processing/include/CGAL/Polygon_mesh_processing/compute_normal.h
@@ -516,6 +516,9 @@ compute_vertex_normal_most_visible_min_circle(typename boost::graph_traits<Polyg
     if(f == boost::graph_traits<PolygonMesh>::null_face())
       continue;
 
+    if((! incident_faces.empty()) && (get(face_normals, incident_faces.back()) == get(face_normals, f)) )
+      continue;
+
     incident_faces.push_back(f);
   }