论文信息 - New Technique: Sketch-based rotation editing

New Technique: 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.

Yue Xie | Wei-wei Xu | Yi-zhou Yu | Yan-lin Weng

[1] H. Pottmann,et al. Energy-minimizing splines in manifolds , 2004, SIGGRAPH 2004.

[2] Joseph J. LaViola,et al. A Pen-Based Tool for Visualizing Vector Mathematics , 2010, SBIM.

[3] Marc Alexa,et al. A sketch-based interface for detail-preserving mesh editing , 2005, SIGGRAPH 2005.

[4] Harry Shum,et al. Sketching reality: Realistic interpretation of architectural designs , 2008, TOGS.

[5] Ken Shoemake,et al. Animating rotation with quaternion curves , 1985, SIGGRAPH.

[6] Sung Yong Shin,et al. A general construction scheme for unit quaternion curves with simple high order derivatives , 1995, SIGGRAPH.

[7] Xuejin Chen,et al. Sketch-based tree modeling using Markov random field , 2008, SIGGRAPH 2008.

[8] John F. Hughes,et al. Smooth interpolation of orientations with angular velocity constraints using quaternions , 1992, SIGGRAPH.

[9] Ravi Ramamoorthi,et al. Fast construction of accurate quaternion splines , 1997, SIGGRAPH.

[10] J.-P. Perrin,et al. Introduction to Sequential Systems , 1972 .

[11] Long Quan,et al. Sketching hairstyles , 2007, SBIM '07.

[12] Nuria Oliver,et al. Curve Analogies , 2002, Rendering Techniques.

[13] Takeo Igarashi,et al. A Sketching Interface for Sitting-Pose Design , 2010, SBIM.

[14] Satoshi Matsuoka,et al. Teddy: A Sketching Interface for 3D Freeform Design , 1999, SIGGRAPH Courses.