From c1348079ed6b41a1f1c8740536f4a3736c64bf3e Mon Sep 17 00:00:00 2001
From: enricoturri1966 <enricoturri@seznam.cz>
Date: Tue, 28 Feb 2023 13:00:08 +0100
Subject: [PATCH] Fixed rotation of mirrored parts in Part Coordinates
---
src/slic3r/GUI/Selection.cpp | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index e45f21467..fc2a6e0ea 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -1042,7 +1042,14 @@ void Selection::rotate(const Vec3d& rotation, TransformationType transformation_
const Geometry::Transformation& vol_trafo = volume_data.get_volume_transform();
const Transform3d vol_matrix_no_offset = vol_trafo.get_matrix_no_offset();
const Transform3d inst_scale_matrix = inst_trafo.get_scaling_factor_matrix();
- const Transform3d vol_rotation_matrix = vol_trafo.get_rotation_matrix();
+ Transform3d vol_rotation_matrix = vol_trafo.get_rotation_matrix();
+ if (vol_trafo.is_left_handed()) {
+ Geometry::TransformationSVD vol_svd(vol_trafo);
+ vol_rotation_matrix = vol_svd.u * vol_svd.v.transpose();
+ // ensure the rotation has the proper direction
+ if (!rotation.normalized().cwiseAbs().isApprox(Vec3d::UnitX()))
+ rotation_matrix = rotation_matrix.inverse();
+ }
rotation_matrix = vol_matrix_no_offset.inverse() * inst_scale_matrix.inverse() * vol_rotation_matrix * rotation_matrix *
vol_rotation_matrix.inverse() * inst_scale_matrix * vol_matrix_no_offset;
}