From 131e1f7dc2b0de423a606f41dbd560fd49cf44f6 Mon Sep 17 00:00:00 2001
From: pzpzpzp1 <pzpzpzp1@mit.edu>
Date: Wed, 2 Dec 2020 15:25:18 -0500
Subject: [PATCH] fix slice_triangles. Keep edge to intersected triangle
 pairing consistent.

---
 mesh/slice_triangles.m | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mesh/slice_triangles.m b/mesh/slice_triangles.m
index cf7b64d7..5de14f8a 100644
--- a/mesh/slice_triangles.m
+++ b/mesh/slice_triangles.m
@@ -34,6 +34,6 @@
   W = W(:,2:4);
   R = sign(sum(W.*N,2))>0;
   E(R,:) = fliplr(E(R,:));
-  E = unique(E,'rows');
-
+  [E, perm] = unique(E,'rows');
+  J = J(perm);
 end