From bcef57485a18fd2ee9b5d1da70ba900a0d9897fc Mon Sep 17 00:00:00 2001
From: Lukas Matena <lukasmatena@seznam.cz>
Date: Thu, 11 Nov 2021 15:55:37 +0100
Subject: [PATCH] Make sure the object does not float after simplification

---
 src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp
index b71443b5762..9f5990e2360 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSimplify.cpp
@@ -479,6 +479,7 @@ void GLGizmoSimplify::apply_simplify() {
     mv->calculate_convex_hull();
     mv->set_new_unique_id();
     mv->get_object()->invalidate_bounding_box();
+    mv->get_object()->ensure_on_bed(true); // allow negative z
 
     // fix hollowing, sla support points, modifiers, ...    
     plater->changed_mesh(object_idx);