From 4efc780fc4cabc9853e77e5b0266beedc262a566 Mon Sep 17 00:00:00 2001
From: joostdecock <joost@joost.at>
Date: Sat, 4 Sep 2021 14:45:29 +0200
Subject: [PATCH] fix(core): Handle path.offset() for very short curves

This path.offset method used to travel 2mm along the path to find
out the direction at the start/end of paths.
That caused errors when the curve being offsetted was less then 2mm.
So now, it checks and if it's shorter will use 10% of the path length instead.

This closes #1257
---
 packages/core/src/path.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/packages/core/src/path.js b/packages/core/src/path.js
index 02e237c32da..f799ea51422 100644
--- a/packages/core/src/path.js
+++ b/packages/core/src/path.js
@@ -348,14 +348,20 @@ function pathOffset(path, distance, raise) {
           .withRaise(path.raise)
           .move(current)
           .curve(op.cp1, op.cp2, op.to)
-          .shiftAlong(2)
+        cp1 = cp1.shiftAlong(cp1.length() > 2
+          ? 2
+          : cp1.length()/10
+        )
       } else cp1 = op.cp1
       if (op.cp2.sitsRoughlyOn(op.to)) {
         cp2 = new Path(path.debug)
           .withRaise(path.raise)
           .move(op.to)
           .curve(op.cp2, op.cp1, current)
-          .shiftAlong(2)
+        cp2 = cp2.shiftAlong(cp2.length() > 2
+          ? 2
+          : cp2.length()/10
+        )
       } else cp2 = op.cp2
       let b = new Bezier(
         { x: current.x, y: current.y },