From 540c42d05f6f7aa0523bca47871c79e6c9fe1760 Mon Sep 17 00:00:00 2001
From: Jeremy <53489032+clang-clang-clang@users.noreply.github.com>
Date: Tue, 28 Jul 2026 10:39:46 +0800
Subject: [PATCH] Core: fix mesh bounds after setVertex updates

---
 librtt/Display/Rtt_ShapeAdapterMesh.cpp | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/librtt/Display/Rtt_ShapeAdapterMesh.cpp b/librtt/Display/Rtt_ShapeAdapterMesh.cpp
index 89770333d..804c96167 100644
--- a/librtt/Display/Rtt_ShapeAdapterMesh.cpp
+++ b/librtt/Display/Rtt_ShapeAdapterMesh.cpp
@@ -1,6 +1,7 @@
 //////////////////////////////////////////////////////////////////////////////
 //
 // This file is part of the Corona game engine.
+// With contributions from Dianchu Technology
 // For overview and more information on licensing please refer to README.md 
 // Home page: https://github.com/coronalabs/corona
 // Contact: support@coronalabs.com
@@ -602,11 +603,16 @@ int ShapeAdapterMesh::setVertex( lua_State *L )
     }
 
 	Vertex2& orig = tesselator->GetMesh().WriteAccess()[vertIndex];
-	
-    if( !Rtt_RealEqual(x, orig.x) || !Rtt_RealEqual(y, orig.y) || zChanged)
+
+	bool xyChanged = !Rtt_RealEqual( x, orig.x ) || !Rtt_RealEqual( y, orig.y );
+	if ( xyChanged || zChanged )
 	{
-		orig.x = x;
-		orig.y = y;
+		if ( xyChanged )
+		{
+			orig.x = x;
+			orig.y = y;
+			tesselator->Invalidate();
+		}
 
 		path->Invalidate( ClosedPath::kFillSource |
 						 ClosedPath::kStrokeSource );