From 946d43bc9531ee543f8272a690a968e73c127a55 Mon Sep 17 00:00:00 2001
From: Enrico Turri <enricoturri@seznam.cz>
Date: Mon, 19 Nov 2018 15:49:59 +0100
Subject: [PATCH] Improved fix of export to 3mf of objects splitted into parts

---
 src/libslic3r/Format/3mf.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/Format/3mf.cpp b/src/libslic3r/Format/3mf.cpp
index 0c2e20ea42..6356fa17a6 100644
--- a/src/libslic3r/Format/3mf.cpp
+++ b/src/libslic3r/Format/3mf.cpp
@@ -1875,11 +1875,15 @@ namespace Slic3r {
 
             vertices_count += stl.stats.shared_vertices;
 
+#if ENABLE_MODELVOLUME_TRANSFORM
+            Transform3d matrix = volume->get_matrix();
+#endif // ENABLE_MODELVOLUME_TRANSFORM
+
             for (int i = 0; i < stl.stats.shared_vertices; ++i)
             {
                 stream << "     <" << VERTEX_TAG << " ";
 #if ENABLE_MODELVOLUME_TRANSFORM
-                Vec3d v = volume->get_matrix() * stl.v_shared[i].cast<double>();
+                Vec3d v = matrix * stl.v_shared[i].cast<double>();
                 stream << "x=\"" << v(0) << "\" ";
                 stream << "y=\"" << v(1) << "\" ";
                 stream << "z=\"" << v(2) << "\" />\n";