From 3478b700f93bbf0639a571472eed2b0f2fbefbf8 Mon Sep 17 00:00:00 2001
From: Stewart Allen <stewart.allen@gmail.com>
Date: Tue, 2 Mar 2021 18:36:08 -0500
Subject: [PATCH] fix 'round' bug reports

---
 src/mode/fdm/export.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mode/fdm/export.js b/src/mode/fdm/export.js
index 652b1e57..4ed0bb7e 100644
--- a/src/mode/fdm/export.js
+++ b/src/mode/fdm/export.js
@@ -334,7 +334,7 @@
                 path.layer === 0 ?
                     (process.firstSliceHeight || process.sliceHeight) : path.height);
 
-            zpos = path.z;
+            zpos = path.z || zpos;
             subst.z = subst.Z = zpos.round(3);
             subst.e = subst.E = outputLength;
             subst.layer = layer;