From d6693ea9565e1ba093ec5a48088811b84591e7da Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Wed, 8 Feb 2023 14:08:51 +0100
Subject: [PATCH] Methods Transformation::get_scaling_factor() and
 Transformation::get_scaling_factor_matrix() modified to use TransformationSVD

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

diff --git a/src/libslic3r/Geometry.cpp b/src/libslic3r/Geometry.cpp
index ac4af4828..2c50af6e0 100644
--- a/src/libslic3r/Geometry.cpp
+++ b/src/libslic3r/Geometry.cpp
@@ -539,17 +539,14 @@ void Transformation::set_rotation(Axis axis, double rotation)
 #if ENABLE_WORLD_COORDINATE
 Vec3d Transformation::get_scaling_factor() const
 {
-    const Transform3d scale = extract_scale(m_matrix);
-    return { std::abs(scale(0, 0)), std::abs(scale(1, 1)), std::abs(scale(2, 2)) };
+    const TransformationSVD svd(*this);
+    return { svd.s(0, 0), svd.s(1, 1), svd.s(2, 2) };
 }
 
 Transform3d Transformation::get_scaling_factor_matrix() const
 {
-    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;
+    const TransformationSVD svd(*this);
+    return Transform3d(svd.s);
 }
 #endif // ENABLE_WORLD_COORDINATE