From 8b5b6621645f019328d2b261e5d14afcd06fb662 Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Mon, 13 Feb 2023 14:03:46 +0100
Subject: [PATCH] Revert of d6693ea9565e1ba093ec5a48088811b84591e7da

---
 src/libslic3r/Geometry.cpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/libslic3r/Geometry.cpp b/src/libslic3r/Geometry.cpp
index 2c50af6e01..ac4af48283 100644
--- a/src/libslic3r/Geometry.cpp
+++ b/src/libslic3r/Geometry.cpp
@@ -539,14 +539,17 @@ void Transformation::set_rotation(Axis axis, double rotation)
 #if ENABLE_WORLD_COORDINATE
 Vec3d Transformation::get_scaling_factor() const
 {
-    const TransformationSVD svd(*this);
-    return { svd.s(0, 0), svd.s(1, 1), svd.s(2, 2) };
+    const Transform3d scale = extract_scale(m_matrix);
+    return { std::abs(scale(0, 0)), std::abs(scale(1, 1)), std::abs(scale(2, 2)) };
 }
 
 Transform3d Transformation::get_scaling_factor_matrix() const
 {
-    const TransformationSVD svd(*this);
-    return Transform3d(svd.s);
+    Transform3d scale = extract_scale(m_matrix);
+    scale(0, 0) = std::abs(scale(0, 0));
+    scale(1, 1) = std::abs(scale(1, 1));
+    scale(2, 2) = std::abs(scale(2, 2));
+    return scale;
 }
 #endif // ENABLE_WORLD_COORDINATE