From 64de24c03947bb185605b7209ed545fe666a87bc Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 12 Apr 2023 13:34:06 +0200
Subject: [PATCH] Mesh: [skip ci] restore comment

---
 src/Mod/Mesh/Gui/SoFCIndexedFaceSet.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/Mod/Mesh/Gui/SoFCIndexedFaceSet.cpp b/src/Mod/Mesh/Gui/SoFCIndexedFaceSet.cpp
index 18d0f78386..8a437a44dd 100644
--- a/src/Mod/Mesh/Gui/SoFCIndexedFaceSet.cpp
+++ b/src/Mod/Mesh/Gui/SoFCIndexedFaceSet.cpp
@@ -592,6 +592,9 @@ void SoFCIndexedFaceSet::drawFaces(SoGLRenderAction *action)
         drawCoords(static_cast<const SoGLCoordinateElement*>(coords), cindices, numindices,
                    normals, nindices, &mb, mindices, binding, &tb, tindices);
 
+        // getVertexData() internally calls readLockNormalCache() that read locks
+        // the normal cache. When the cache is not needed any more we must call
+        // readUnlockNormalCache()
         if (normalCacheUsed)
             this->readUnlockNormalCache();