From 6a104ba0c61ab5908f1aa70401567cf5960ffeec Mon Sep 17 00:00:00 2001
From: David Bold <dave@ipp.mpg.de>
Date: Tue, 19 Mar 2024 15:41:00 +0100
Subject: [PATCH 1/2] Add maskFromRegion

---
 include/bout/mask.hxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/bout/mask.hxx b/include/bout/mask.hxx
index fc5f814676..378ac835bc 100644
--- a/include/bout/mask.hxx
+++ b/include/bout/mask.hxx
@@ -80,4 +80,12 @@ inline std::unique_ptr<Region<Ind3D>> regionFromMask(const BoutMask& mask,
   }
   return std::make_unique<Region<Ind3D>>(indices);
 }
+
+inline BoutMask maskFromRegion(const Region<Ind3D>& region, const Mesh* mesh) {
+  BoutMask mask{mesh, false};
+
+  BOUT_FOR(i, region) { mask[i] = true; }
+  return mask;
+}
+
 #endif //BOUT_MASK_H

From 5ac876b2b20b964e1c418aeb22548a3fd36f4fe3 Mon Sep 17 00:00:00 2001
From: David Bold <dave@ipp.mpg.de>
Date: Wed, 4 Mar 2026 11:50:49 +0100
Subject: [PATCH 2/2] Add missing header

---
 include/bout/mask.hxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/bout/mask.hxx b/include/bout/mask.hxx
index 378ac835bc..9033080d44 100644
--- a/include/bout/mask.hxx
+++ b/include/bout/mask.hxx
@@ -26,6 +26,7 @@
 
 #include "bout/globals.hxx"
 #include "bout/mesh.hxx"
+#include "bout/region.hxx"
 
 /**
  * 3D array of bools to mask Field3Ds