MotionBender: A Gesture-Based Interaction Technique for Editing Motion Paths

Frederic Raber; Quan Nguyen; Michael Kipp
In: Paula Kotzé; Gary Marsden; Gitte Lindgaard; Janet Wesson; Marco Winckler (Hrsg.). Proceedings of the 14th IFIP Conference on Human-Computer Interaction. IFIP Conference on Human-Computer Interaction (INTERACT-2013), 14th IFIP TC 13 International Conference, September 4-6, Cape Town, South Africa, Pages 78-85, Lecture Notes in Computer Science (LNCS), Vol. 8117, No. 2013, ISBN 978-3-642-40482-5, Springer, 9/2013.


Precision tasks in 3D like object manipulation or character animation call for new gestural interfaces that utilize many input degrees of freedom. We present MotionBender, a sensor-based interaction technique for post-editing the motion of e.g. the hands in character animation data. For the visualization of motion we use motion paths, often used for showing e.g. the movement of the hand through space over time, and allow the user to directly "bend" the 3D motion path with his/her hands and twist it into the right shape. In a comparative evaluation with a mouse-based interface we found that subjects using our technique were significantly faster. Moreover, with our technique, subject movement was more coordinated, i.e. movement was done in all three dimensions in parallel, and the participants preferred our technique in a post-experiment questionnaire. We also found a gender effect: male users both like the gesture interaction better and achieve better performance.

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