Fix for SPE-700 (Corrupted slice data)

src/libslic3r/SLA/SLASupportTree.cpp

@@ -722,6 +722,10 @@ public:
         return m_pad;
     }
 
+    void remove_pad() {
+        m_pad = Pad();
+    }
+
     const Pad& pad() const { return m_pad; }
 
     // WITHOUT THE PAD!!!
@@ -1729,6 +1733,11 @@ const TriangleMesh &SLASupportTree::get_pad() const
     return m_impl->pad().tmesh;
 }
 
+void SLASupportTree::remove_pad()
+{
+    m_impl->remove_pad();
+}
+
 SLASupportTree::SLASupportTree(const PointSet &points,
                                const EigenMesh3D& emesh,
                                const SupportConfig &cfg,

src/libslic3r/SLA/SLASupportTree.hpp

@@ -164,6 +164,8 @@ public:
     /// Get the pad geometry
     const TriangleMesh& get_pad() const;
 
+    void remove_pad();
+
 };
 
 }

src/libslic3r/SLA/SLASupportTreeIGL.cpp

@@ -198,7 +198,7 @@ PointSet normals(const PointSet& points, const EigenMesh3D& emesh,
         });
 
         if(!neighnorms.empty()) { // there were neighbors to count with
-            // sum up the normals and than normalize the result again.
+            // sum up the normals and then normalize the result again.
             // This unification seems to be enough.
             Vec3d sumnorm(0, 0, 0);
             sumnorm = std::accumulate(neighnorms.begin(), lend, sumnorm);