lib/tracksperanto/keyframe.rb in tracksperanto-2.8.0 vs lib/tracksperanto/keyframe.rb in tracksperanto-2.8.1

@@ -25,6 +25,10 @@
   cast_to_int :frame
   
   def inspect
     '#< %.1fx%.1f @%d ~%.2f) >' %  [abs_x, abs_y, frame, residual]
   end
+  
+  def <=>(another)
+    frame <=> another.frame
+  end
 end
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