Motion Warping
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This (very) short paper describes motion warping! The idea for warping   
was explained both in the chapter about motion editing and in the   
motion signal processing paper. The new thing here is that   
this is combined with input from the user. The user puts some   
constraints on the signal, and the motion is warped to conform to   
the new constraints without losing much of its original   
characteristics. They show some nice results for their system!