avoid simple satin division by zero error

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/elements/stroke.py b/lib/elements/stroke.py
index 307c78b8..c9c0f795 100644
--- a/lib/elements/stroke.py
+++ b/lib/elements/stroke.py
@@ -167,6 +167,10 @@ class Stroke(EmbroideryElement):
         for i in range(len(patch) - 1):
             start = patch.stitches[i]
             end = patch.stitches[i + 1]
+            # sometimes the stitch results into zero length which cause a division by zero error
+            # ignoring this leads to a slightly bad result, but that is better than no output
+            if (end - start).length() == 0:
+                continue
             segment_direction = (end - start).unit()
             zigzag_direction = segment_direction.rotate_left()