1 files changed, 7 insertions, 7 deletions

diff --git a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
index ab35cec9b..e3044dfc7 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
@@ -129,10 +129,10 @@ void GLGizmoSlaSupports::render_points(const Selection& selection, bool picking)
     });
 
     const GLVolume* vol = selection.get_volume(*selection.get_volume_idxs().begin());
-    const Transform3d& instance_scaling_matrix_inverse = vol->get_instance_transformation().get_matrix(true, true, false, true).inverse();
-    const Transform3d& instance_matrix = vol->get_instance_transformation().get_matrix();
-    float z_shift = m_c->selection_info()->get_sla_shift();
-
+    Geometry::Transformation transformation(vol->get_instance_transformation().get_matrix() * vol->get_volume_transformation().get_matrix());
+    const Transform3d& instance_scaling_matrix_inverse = transformation.get_matrix(true, true, false, true).inverse();
+    const Transform3d& instance_matrix = transformation.get_matrix();
+    const float z_shift = m_c->selection_info()->get_sla_shift();
     glsafe(::glPushMatrix());
     glsafe(::glTranslated(0.0, 0.0, z_shift));
     glsafe(::glMultMatrixd(instance_matrix.data()));
@@ -269,7 +269,7 @@ bool GLGizmoSlaSupports::is_mesh_point_clipped(const Vec3d& point) const
     auto sel_info = m_c->selection_info();
     int active_inst = m_c->selection_info()->get_active_instance();
     const ModelInstance* mi = sel_info->model_object()->instances[active_inst];
-    const Transform3d& trafo = mi->get_transformation().get_matrix();
+    const Transform3d& trafo = mi->get_transformation().get_matrix() * sel_info->model_object()->volumes.front()->get_matrix();
 
     Vec3d transformed_point =  trafo * point;
     transformed_point(2) += sel_info->get_sla_shift();
@@ -288,7 +288,7 @@ bool GLGizmoSlaSupports::unproject_on_mesh(const Vec2d& mouse_pos, std::pair<Vec
     const Camera& camera = wxGetApp().plater()->get_camera();
     const Selection& selection = m_parent.get_selection();
     const GLVolume* volume = selection.get_volume(*selection.get_volume_idxs().begin());
-    Geometry::Transformation trafo = volume->get_instance_transformation();
+    Geometry::Transformation trafo = volume->get_instance_transformation() * volume->get_volume_transformation();
     trafo.set_offset(trafo.get_offset() + Vec3d(0., 0., m_c->selection_info()->get_sla_shift()));
 
     double clp_dist = m_c->object_clipper()->get_position();
@@ -1110,7 +1110,7 @@ void GLGizmoSlaSupports::get_data_from_backend()
         if (po->model_object()->id() == mo->id()) {
             m_normal_cache.clear();
             const std::vector<sla::SupportPoint>& points = po->get_support_points();
-            auto mat = po->trafo().inverse().cast<float>();
+            auto mat = (po->trafo() * po->model_object()->volumes.front()->get_transformation().get_matrix()).inverse().cast<float>();
             for (unsigned int i=0; i<points.size();++i)
                 m_normal_cache.emplace_back(sla::SupportPoint(mat * points[i].pos, points[i].head_front_radius, points[i].is_new_island));