From 7783915a34c664d14e9e1a81d5da2c46282a33d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Wed, 29 Jun 2022 18:33:01 +0200
Subject: [PATCH] Fix of #8435 - Division by zero in lightning infill when
 automatic extrusion width was used.

---
 src/libslic3r/Fill/Lightning/Generator.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/Fill/Lightning/Generator.cpp b/src/libslic3r/Fill/Lightning/Generator.cpp
index 75ca5583e..ce527d351 100644
--- a/src/libslic3r/Fill/Lightning/Generator.cpp
+++ b/src/libslic3r/Fill/Lightning/Generator.cpp
@@ -36,7 +36,9 @@ Generator::Generator(const PrintObject &print_object, const std::function<void()
     // Note: There's not going to be a layer below the first one, so the 'initial layer height' doesn't have to be taken into account.
     const double               layer_thickness      = scaled<double>(object_config.layer_height.value);
 
-    m_infill_extrusion_width = scaled<float>(region_config.infill_extrusion_width.percent ? default_infill_extrusion_width * 0.01 * region_config.infill_extrusion_width : region_config.infill_extrusion_width);
+    m_infill_extrusion_width = scaled<float>(region_config.infill_extrusion_width.percent ? default_infill_extrusion_width * 0.01 * region_config.infill_extrusion_width :
+                                             region_config.infill_extrusion_width != 0.   ? region_config.infill_extrusion_width :
+                                                                                            default_infill_extrusion_width);
     m_supporting_radius      = coord_t(m_infill_extrusion_width) * 100 / coord_t(region_config.fill_density.value);
 
     const double lightning_infill_overhang_angle      = M_PI / 4; // 45 degrees