From 1d5c7bd442d0c8901047937ac9d984f7d2895c84 Mon Sep 17 00:00:00 2001
From: "xun.zhang" <xun.zhang@bambulab.com>
Date: Thu, 9 Nov 2023 14:32:41 +0800
Subject: [PATCH] FIX: scale problem in needs_retraction

jira:[NEW]

Signed-off-by: xun.zhang <xun.zhang@bambulab.com>
Change-Id: Idfbe954b22fa6aa5769c55e46874fa6a80ecbf45
(cherry picked from commit 4e853f50b748e3af11e2d64862b6ee557fda361b)
---
 src/libslic3r/GCode.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/libslic3r/GCode.cpp b/src/libslic3r/GCode.cpp
index e506d8ac6..853c04c1c 100644
--- a/src/libslic3r/GCode.cpp
+++ b/src/libslic3r/GCode.cpp
@@ -4642,10 +4642,11 @@ bool GCode::needs_retraction(const Polyline &travel, ExtrusionRole role, LiftTyp
         travel_bbox.inflated(1);
         travel_bbox.defined = true;
 
-        const float protect_z_scaled = scale_(0.4);
+        // do not scale for z
+        const float protect_z = 0.4;
         std::pair<float, float> z_range;
         z_range.second = m_layer ? m_layer->print_z : 0.f;
-        z_range.first = std::max(0.f, z_range.second - protect_z_scaled);
+        z_range.first = std::max(0.f, z_range.second - protect_z);
         std::vector<LayerPtrs> layers_of_objects;
         std::vector<BoundingBox> boundingBox_for_objects;
         std::vector<Points> objects_instances_shift;