From 044a1d5ba4295509c10b90f3832e9813d55722b5 Mon Sep 17 00:00:00 2001
From: SoftFever <softfeverever@gmail.com>
Date: Mon, 5 Jan 2026 20:33:13 +0800
Subject: [PATCH] Fixed an issue where the wipe tower did not account for
 `z_offset`, especially when "No sparse layers" is enabled. (#11833)

# Description

This PR addresses the issue that WipeTower's start z position didn't consider the z_offset.

fixes #11611

# Screenshots/Recordings/Graphs

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> Please attach relevant screenshots to showcase the UI changes.
> Please attach images that can help explain the changes.
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## Tests

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> Please describe the tests that you have conducted to verify the changes made in this PR.
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---
 src/libslic3r/GCode.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/libslic3r/GCode.hpp b/src/libslic3r/GCode.hpp
index 2bf29aa002..30c48df054 100644
--- a/src/libslic3r/GCode.hpp
+++ b/src/libslic3r/GCode.hpp
@@ -97,7 +97,8 @@ public:
         m_enable_timelapse_print(print_config.timelapse_type.value == TimelapseType::tlSmooth),
         m_enable_wrapping_detection(print_config.enable_wrapping_detection && (print_config.wrapping_exclude_area.values.size() > 2) && (slice_used_filaments.size() <= 1)),
         m_is_first_print(true),
-        m_print_config(&print_config)
+        m_print_config(&print_config),
+        m_last_wipe_tower_print_z(print_config.z_offset.value)
     {
         // initialize with the extruder offset of master extruder id
         m_extruder_offsets.resize(print_config.filament_map.size(), print_config.extruder_offset.get_at(print_config.master_extruder_id.value - 1));
@@ -143,7 +144,7 @@ private:
     // Current layer index.
     int                                                          m_layer_idx;
     int                                                          m_tool_change_idx;
-    double                                                       m_last_wipe_tower_print_z = 0.f;
+    double                                                       m_last_wipe_tower_print_z;
 
     // BBS
     Vec3d                                                        m_plate_origin;