From 4da0b708f24c43892712a25ef826c599490d3933 Mon Sep 17 00:00:00 2001
From: zlyfunction <zhuleyi001@126.com>
Date: Wed, 18 Oct 2023 23:29:02 -0400
Subject: [PATCH] in find_local_switch_sequence_trimesh if source==target then
 return a empty sequence

---
 src/wmtk/multimesh/utils/find_local_switch_sequence.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/wmtk/multimesh/utils/find_local_switch_sequence.cpp b/src/wmtk/multimesh/utils/find_local_switch_sequence.cpp
index 393c50dc9a..131b15efdf 100644
--- a/src/wmtk/multimesh/utils/find_local_switch_sequence.cpp
+++ b/src/wmtk/multimesh/utils/find_local_switch_sequence.cpp
@@ -10,6 +10,9 @@ std::vector<PrimitiveType> find_local_switch_sequence_trimesh(
     const Tuple& target)
 {
     // TODO: assert that base_source and base_target use the same global CID
+    if (source == target) {
+        return std::vector<PrimitiveType>{};
+    }
 
     // circulate
     Tuple cur_tuple = source;