From a59b3899bf14066d10f7a7dda84f9ce722f23ca9 Mon Sep 17 00:00:00 2001
From: Weiliang Jin <weiliang@flexcompute.com>
Date: Thu, 14 Nov 2024 11:29:13 -0800
Subject: [PATCH] Fix potential self-intersection polygon in
 Scene._filter_structures_plane

---
 tidy3d/components/scene.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tidy3d/components/scene.py b/tidy3d/components/scene.py
index 11ca0a3ee..9751e8572 100644
--- a/tidy3d/components/scene.py
+++ b/tidy3d/components/scene.py
@@ -654,7 +654,7 @@ def _filter_structures_plane(
                 if _shape.is_empty or not shape.intersects(_shape):
                     continue
 
-                diff_shape = _shape - shape
+                diff_shape = (_shape - shape).buffer(0)
 
                 # different prop, remove intersection from background shape
                 if prop != _prop and len(diff_shape.bounds) > 0: