From 987fb294fec5cb0860704545ccd04c9b0e3db749 Mon Sep 17 00:00:00 2001
From: Rowan Winsemius <rowanwins@yahoo.com.au>
Date: Mon, 4 Apr 2022 20:47:02 +1000
Subject: [PATCH] flip transition if swapping between hole & exterior

---
 src/connect_edges.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/connect_edges.js b/src/connect_edges.js
index 0ce5c43..7cc9f00 100644
--- a/src/connect_edges.js
+++ b/src/connect_edges.js
@@ -96,7 +96,12 @@ function initializeContourFromContext(event, contours, contourId) {
     // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
     // result".
     const lowerContourId = prevInResult.outputContourId;
-    const lowerResultTransition = prevInResult.resultTransition;
+    let lowerResultTransition = prevInResult.resultTransition;
+
+    if (!event.isExteriorRing && prevInResult.isExteriorRing) {
+      lowerResultTransition = 1;
+    }
+
     if (lowerResultTransition > 0) {
       // We are inside. Now we have to check if the thing below us is another hole or
       // an exterior contour.