diff --git a/mesh/deform.m b/mesh/deform.m
index b60137d5..8e903fb9 100644
--- a/mesh/deform.m
+++ b/mesh/deform.m
@@ -435,6 +435,11 @@
       this.new_C = new_C;
       this.update_positions();
     end
+    
+    function this = set_R(this,R)
+      this.R = R;
+      this.update_positions();
+    end
 
     function this = update_positions(this)
       % update mesh positions