From 407713ae1a580f740fd9e485a73b6fa96b4bcf43 Mon Sep 17 00:00:00 2001
From: Kaalleen <36401965+kaalleen@users.noreply.github.com>
Date: Sat, 12 Jul 2025 07:58:49 +0200
Subject: satin: fix empty rail issue (#3863)

---
 lib/elements/satin_column.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'lib/elements')

diff --git a/lib/elements/satin_column.py b/lib/elements/satin_column.py
index 3a29aca7..51a10cad 100644
--- a/lib/elements/satin_column.py
+++ b/lib/elements/satin_column.py
@@ -643,6 +643,10 @@ class SatinColumn(EmbroideryElement):
                 if reverse:
                     paths[i] = shgeo.LineString(paths[i].coords[::-1])
 
+        # if one of the rails has no nodes, return an empty tuple
+        if any([path.is_empty for path in paths]):
+            return tuple()
+
         return tuple(paths)
 
     @property
@@ -723,7 +727,7 @@ class SatinColumn(EmbroideryElement):
         # This takes advantage of the fact that sum() counts True as 1
         intersection_counts = [sum(paths[i].intersects(paths[j]) for j in range(num_paths) if i != j)
                                for i in range(num_paths)]
-        paths_not_intersecting_two = [i for i in range(num_paths) if intersection_counts[i] != 2]
+        paths_not_intersecting_two = [i for i in range(num_paths) if intersection_counts[i] != 2 and paths[i].length > 0.001]
         num_not_intersecting_two = len(paths_not_intersecting_two)
 
         if num_not_intersecting_two == 2:
-- 
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