From f9e06f236310ffdd7b7dd89cb1319d3020696638 Mon Sep 17 00:00:00 2001
From: Adrian Mariano <avm4@cornell.edu>
Date: Mon, 29 Apr 2024 21:37:09 -0400
Subject: [PATCH] 2d bugfix

---
 attachments.scad | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/attachments.scad b/attachments.scad
index e9edd17..49f1f4e 100644
--- a/attachments.scad
+++ b/attachments.scad
@@ -923,7 +923,9 @@ module attach(parent, child, overlap, align, spin=0, norot, inset=0, shiftout=0,
                          str("Invalid alignment: align value (",align,") includes component parallel to parent anchor (",anchor,")"));
             pos = is_undef(align) ? anchor_data[1] : _find_anchor(anchor+align, $parent_geom)[1];
             $attach_anchor = list_set(anchor_data, 1, pos);      ///
-            startdir = anchor==UP || anchor==DOWN ? BACK : UP - (anchor*UP)*anchor/(anchor*anchor);
+            startdir = two_d? undef
+                     : anchor==UP || anchor==DOWN ? BACK
+                     : UP - (anchor*UP)*anchor/(anchor*anchor);
             enddir = is_undef(child) || child.z==0 ? UP : BACK;
             child_adjustment = is_undef(align)? CTR
                               : two_d ? rot(to=factor*child,from=-anchor,p=align)