From ac344aae1f13ebcb4f5ea67e7d5df739a85e718a Mon Sep 17 00:00:00 2001
From: Sean Kim <SeanCTKim@protonmail.com>
Date: Fri, 26 Jul 2024 21:42:09 +0200
Subject: [PATCH] Subdiv: Add neighbor slicing helper methods

Pull Request: https://projects.blender.org/blender/blender/pulls/125513
---
 source/blender/blenkernel/BKE_subdiv_ccg.hh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/source/blender/blenkernel/BKE_subdiv_ccg.hh b/source/blender/blenkernel/BKE_subdiv_ccg.hh
index 3cb9a8fa4e6..72cf129da80 100644
--- a/source/blender/blenkernel/BKE_subdiv_ccg.hh
+++ b/source/blender/blenkernel/BKE_subdiv_ccg.hh
@@ -15,6 +15,7 @@
 #include "BLI_bit_span_ops.hh"
 #include "BLI_index_mask_fwd.hh"
 #include "BLI_offset_indices.hh"
+#include "BLI_span.hh"
 #include "BLI_sys_types.h"
 #include "BLI_utility_mixins.hh"
 #include "BLI_vector.hh"
@@ -248,6 +249,16 @@ void BKE_subdiv_ccg_topology_counters(const SubdivCCG &subdiv_ccg,
 struct SubdivCCGNeighbors {
   blender::Vector<SubdivCCGCoord, 256> coords;
   int num_duplicates;
+
+  blender::Span<SubdivCCGCoord> unique() const
+  {
+    return this->coords.as_span().drop_back(num_duplicates);
+  }
+
+  blender::Span<SubdivCCGCoord> duplicate() const
+  {
+    return this->coords.as_span().take_back(num_duplicates);
+  }
 };
 
 void BKE_subdiv_ccg_print_coord(const char *message, const SubdivCCGCoord &coord);