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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (11): 867-872    DOI: 10.1631/jzus.C1000373
    
Sketch-based rotation editing
Yue Xie1, Wei-wei Xu2, Yi-zhou Yu3, Yan-lin Weng*,1
1 School of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China 2 Internet Graphics Group, Microsoft Research Asia, Beijing 100190, China 3 Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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Abstract  We present a sketch-based rotation editing system for enriching rotational motion in keyframe animations. Given a set of keyframe orientations of a rigid object, the user first edits its angular velocity trajectory by sketching curves, and then the system computes the altered rotational motion by solving a variational curve fitting problem. The solved rotational motion not only satisfies the orientation constraints at the keyframes, but also fits well the user-specified angular velocity trajectory. Our system is simple and easy to use. We demonstrate its usefulness by adding interesting and realistic rotational details to several keyframe animations.

Key words： Quaternions      Keyframe interpolation      Animation editing     
Received: 24 October 2010      Published: 04 November 2011
CLC:  TP391.4  
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Yue Xie
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Cite this article:

Yue Xie, Wei-wei Xu, Yi-zhou Yu, Yan-lin Weng. Sketch-based rotation editing. Front. Inform. Technol. Electron. Eng., 2011, 12(11): 867-872.

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http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C1000373     OR     http://www.zjujournals.com/xueshu/fitee/Y2011/V12/I11/867


Sketch-based rotation editing

We present a sketch-based rotation editing system for enriching rotational motion in keyframe animations. Given a set of keyframe orientations of a rigid object, the user first edits its angular velocity trajectory by sketching curves, and then the system computes the altered rotational motion by solving a variational curve fitting problem. The solved rotational motion not only satisfies the orientation constraints at the keyframes, but also fits well the user-specified angular velocity trajectory. Our system is simple and easy to use. We demonstrate its usefulness by adding interesting and realistic rotational details to several keyframe animations.

关键词： Quaternions,  Keyframe interpolation,  Animation editing 
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