From ed64d139a4a0999c86defb26f2fca68fa76761f9 Mon Sep 17 00:00:00 2001
From: Pierre Anquez <pierre.anquez@geode-solutions.com>
Date: Sun, 5 Apr 2026 11:31:31 +0200
Subject: [PATCH] fix(SurfaceBuilder): enable reproductible computation of
 polygon adjacencies

---
 src/geode/mesh/builder/surface_mesh_builder.cpp        | 2 +-
 src/geode/mesh/core/solid_edges.cpp                    | 2 --
 src/geode/mesh/core/solid_facets.cpp                   | 2 --
 src/geode/mesh/core/texture_manager.cpp                | 2 --
 src/geode/mesh/helpers/repair_polygon_orientations.cpp | 2 --
 5 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/src/geode/mesh/builder/surface_mesh_builder.cpp b/src/geode/mesh/builder/surface_mesh_builder.cpp
index 5c41af26a..b1ae927bb 100644
--- a/src/geode/mesh/builder/surface_mesh_builder.cpp
+++ b/src/geode/mesh/builder/surface_mesh_builder.cpp
@@ -654,7 +654,7 @@ namespace geode
         else
         {
             using Edge = detail::VertexCycle< std::array< index_t, 2 > >;
-            absl::flat_hash_map< Edge, PolygonEdge > edges;
+            absl::linked_hash_map< Edge, PolygonEdge > edges;
             for( const auto polygon : polygons_to_connect )
             {
                 for( const auto e :
diff --git a/src/geode/mesh/core/solid_edges.cpp b/src/geode/mesh/core/solid_edges.cpp
index 81ac7c948..b55436c3a 100644
--- a/src/geode/mesh/core/solid_edges.cpp
+++ b/src/geode/mesh/core/solid_edges.cpp
@@ -23,8 +23,6 @@
 
 #include <geode/mesh/core/solid_edges.hpp>
 
-#include <absl/container/flat_hash_set.h>
-
 #include <bitsery/brief_syntax/array.h>
 
 #include <geode/basic/attribute_manager.hpp>
diff --git a/src/geode/mesh/core/solid_facets.cpp b/src/geode/mesh/core/solid_facets.cpp
index 525ba7295..5217f4c0a 100644
--- a/src/geode/mesh/core/solid_facets.cpp
+++ b/src/geode/mesh/core/solid_facets.cpp
@@ -23,8 +23,6 @@
 
 #include <geode/mesh/core/solid_facets.hpp>
 
-#include <absl/container/flat_hash_set.h>
-
 #include <bitsery/brief_syntax/array.h>
 
 #include <geode/basic/attribute_manager.hpp>
diff --git a/src/geode/mesh/core/texture_manager.cpp b/src/geode/mesh/core/texture_manager.cpp
index c1f426621..d24aad52e 100644
--- a/src/geode/mesh/core/texture_manager.cpp
+++ b/src/geode/mesh/core/texture_manager.cpp
@@ -23,8 +23,6 @@
 
 #include <geode/mesh/core/texture_manager.hpp>
 
-#include <absl/container/flat_hash_map.h>
-
 #include <bitsery/ext/std_map.h>
 
 #include <geode/basic/attribute_manager.hpp>
diff --git a/src/geode/mesh/helpers/repair_polygon_orientations.cpp b/src/geode/mesh/helpers/repair_polygon_orientations.cpp
index 8b30758a3..3e5101145 100644
--- a/src/geode/mesh/helpers/repair_polygon_orientations.cpp
+++ b/src/geode/mesh/helpers/repair_polygon_orientations.cpp
@@ -25,8 +25,6 @@
 
 #include <queue>
 
-#include <absl/container/flat_hash_map.h>
-
 #include <geode/basic/logger.hpp>
 #include <geode/basic/uuid.hpp>