1 files changed, 36 insertions, 0 deletions
diff --git a/xs/src/libslic3r/Model.cpp b/xs/src/libslic3r/Model.cpp
index ec7447352..65743da8d 100644
--- a/xs/src/libslic3r/Model.cpp
+++ b/xs/src/libslic3r/Model.cpp
@@ -1054,6 +1054,29 @@ size_t ModelVolume::split(unsigned int max_extruders)
     return idx;
 }
 
+#if ENABLE_MODELINSTANCE_3D_ROTATION
+void ModelInstance::set_rotation(const Vec3d& rotation)
+{
+    set_rotation(X, rotation(0));
+    set_rotation(Y, rotation(1));
+    set_rotation(Z, rotation(2));
+}
+
+void ModelInstance::set_rotation(Axis axis, double rotation)
+{
+    static const double TWO_PI = 2.0 * (double)PI;
+    while (rotation < 0.0)
+    {
+        rotation += TWO_PI;
+    }
+    while (TWO_PI < rotation)
+    {
+        rotation -= TWO_PI;
+    }
+    m_rotation(axis) = rotation;
+}
+#endif // ENABLE_MODELINSTANCE_3D_ROTATION
+
 void ModelInstance::transform_mesh(TriangleMesh* mesh, bool dont_translate) const
 {
     mesh->transform(world_matrix(dont_translate).cast<float>());
@@ -1098,7 +1121,12 @@ Vec3d ModelInstance::transform_vector(const Vec3d& v, bool dont_translate) const
 
 void ModelInstance::transform_polygon(Polygon* polygon) const
 {
+#if ENABLE_MODELINSTANCE_3D_ROTATION
+    // CHECK_ME -> Is the following correct or it should take in account all three rotations ?
+    polygon->rotate(this->m_rotation(2));                // rotate around polygon origin
+#else
     polygon->rotate(this->rotation);                // rotate around polygon origin
+#endif // ENABLE_MODELINSTANCE_3D_ROTATION
     polygon->scale(this->scaling_factor);           // scale around polygon origin
 }
 
@@ -1114,7 +1142,15 @@ Transform3d ModelInstance::world_matrix(bool dont_translate, bool dont_rotate, b
 #endif // ENABLE_MODELINSTANCE_3D_OFFSET
 
     if (!dont_rotate)
+#if ENABLE_MODELINSTANCE_3D_ROTATION
+    {
+        m.rotate(Eigen::AngleAxisd(m_rotation(2), Vec3d::UnitZ()));
+        m.rotate(Eigen::AngleAxisd(m_rotation(1), Vec3d::UnitY()));
+        m.rotate(Eigen::AngleAxisd(m_rotation(0), Vec3d::UnitX()));
+    }
+#else
         m.rotate(Eigen::AngleAxisd(rotation, Vec3d::UnitZ()));
+#endif // ENABLE_MODELINSTANCE_3D_ROTATION
 
     if (!dont_scale)
         m.scale(scaling_factor);