From 1ca8fec789e5cbb6eca6ea570320574c9118b38f Mon Sep 17 00:00:00 2001
From: leonarski_f <filip.leonarski@psi.ch>
Date: Sun, 7 Jun 2026 19:26:38 +0200
Subject: [PATCH] NXmx: Save rotationExtraLattices (if present)

---
 writer/HDF5NXmx.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/writer/HDF5NXmx.cpp b/writer/HDF5NXmx.cpp
index 45d6849f..dcbd0e54 100644
--- a/writer/HDF5NXmx.cpp
+++ b/writer/HDF5NXmx.cpp
@@ -794,6 +794,19 @@ void NXmx::Finalize(const EndMessage &end) {
             SaveVector(*hdf5_file, "/entry/MX/rotationLatticeIndexed", end.rotation_lattice->GetVector())
             ->Units("Angstrom");
 
+        if (!end.rotation_extra_lattices.empty()) {
+         std::vector<float> latt_info(9 * end.rotation_extra_lattices.size());
+            for (int i = 0; i < end.rotation_extra_lattices.size(); i++) {
+                auto vec = end.rotation_extra_lattices[i].GetVector();
+                for (int j = 0; j < 9; j++)
+                    latt_info[i * 9 + j] = vec[j];
+            }
+            SaveVector(*hdf5_file,
+                "/entry/MX/rotationExtraLattices",
+                latt_info,{end.rotation_extra_lattices.size(), 9})
+            ->Units("Angstrom");
+        }
+
         if (end.rotation_lattice_type)
             SaveScalar(*hdf5_file, "/entry/MX/rotationLatticeNiggliClass", end.rotation_lattice_type->niggli_class);