From a51d1c614f22fdd960d0cf83415df85ecfee59ec Mon Sep 17 00:00:00 2001
From: MelchiorSchuh <melchior.schuh-senlis@geode-solutions.com>
Date: Wed, 29 Jul 2026 10:45:08 +0200
Subject: [PATCH] fix(LightRegularGrid): Added clone function

---
 .../geode/mesh/core/light_regular_grid.hpp    |  2 ++
 src/geode/mesh/core/light_regular_grid.cpp    | 23 +++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/geode/mesh/core/light_regular_grid.hpp b/include/geode/mesh/core/light_regular_grid.hpp
index 8ef76c03b..c91dc4b68 100644
--- a/include/geode/mesh/core/light_regular_grid.hpp
+++ b/include/geode/mesh/core/light_regular_grid.hpp
@@ -94,6 +94,8 @@ namespace geode
 
         [[nodiscard]] BoundingBox< dimension > bounding_box() const;
 
+        [[nodiscard]] LightRegularGrid< dimension > clone() const;
+
     private:
         friend class bitsery::Access;
         template < typename Archive >
diff --git a/src/geode/mesh/core/light_regular_grid.cpp b/src/geode/mesh/core/light_regular_grid.cpp
index b1a664681..030febbdd 100644
--- a/src/geode/mesh/core/light_regular_grid.cpp
+++ b/src/geode/mesh/core/light_regular_grid.cpp
@@ -195,6 +195,29 @@ namespace geode
         return this->grid_bounding_box();
     }
 
+    template < index_t dimension >
+    LightRegularGrid< dimension > LightRegularGrid< dimension >::clone() const
+    {
+        auto origin_position = this->vertex_indices( 0 );
+        auto origin = this->grid_point( origin_position );
+        std::array< index_t, dimension > cells_number;
+        std::array< Vector< dimension >, dimension > directions;
+        for( const auto axis : LRange{ dimension } )
+        {
+            cells_number[axis] = this->nb_cells_in_direction( axis );
+            directions[axis] = Vector< dimension >{ origin,
+                this->grid_point(
+                    this->next_vertex( origin_position, axis ).value() ) };
+        }
+        LightRegularGrid< dimension > clone{ origin, cells_number, directions };
+        IdentifierBuilder builder{ clone };
+        builder.copy_identifier( *this );
+        clone.grid_vertex_attribute_manager().copy(
+            this->grid_vertex_attribute_manager() );
+        clone.cell_attribute_manager().copy( this->cell_attribute_manager() );
+        return clone;
+    }
+
     template < index_t dimension >
     template < typename Archive >
     void LightRegularGrid< dimension >::serialize( Archive& serializer )