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.
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References
Barr, A.H., Currin, B., Gabriel, S., Hughes, J.F., 1992. Smooth interpolation of orientations with angular velocity constraints using quaternions. Comput. Graph., 26(2):313–320. [doi:10.1145/142920.134086]
Bott, J., LaViola, J., 2010. A Pen-Based Tool for Visualizing Vector Mathematics. Eurographics Workshop on Sketch-Based Interfaces and Modeling, p.103–110.
Chen, X., Kang, S., Xu, Y., Dorsey, J., Shum, H.Y., 2008a. Sketching reality: realistic interpretation of architectural designs. ACM Trans. Graph., 27(2):11.[doi:10.1145/1356682.1356684]
Chen, X., Neubert, B., Xu, Y., Deussen, O., Kang, S., 2008b. Sketch-based tree modeling using Markov random field. ACM Trans. Graph., 27(5):109. [doi:10. 1145/1409060.1409062]
Fu, H., Wei, Y., Tai, C.L., Quan, L., 2007. Sketching Hairstyles. Eurographics Workshop on Sketch-Based Interfaces and Modeling, p.31–36.
Gockenbach, M.S., 2003. Introduction to Sequential Quadratic Programming. Available from http://www. math.mtu.edu/~msgocken [Accessed on Oct. 10, 2010].
Hertzmann, A., Oliver, N., Curless, B., Seitz, S.M., 2002. Curve Analogies. Proc. 13th Eurographics Workshop on Rendering, p.233–246.
Hofer, M., Pottmann, H., 2004. Energy-minimizing splines in manifolds. ACM Trans. Graph., 23(3):284–293. [doi:10.1145/1015706.1015716]
Igarashi, T., Matsuoka, S., Tanaka, H., 1999. Teddy: a sketching interface for 3D freeform design. Comput. Graph., 33(3):409–416. [doi:10.1145/311535.311602]
Kim, M.J., Kim, M.S., Shin, S.Y., 1995. A general construction scheme for unit quaternion curves with simple high order derivatives. Comput. Graph., 29(3):369–376. [doi:10.1145/218380.218486]
Lin, J., Igarashi, T., Mitani, J., Saul, G., 2010. A Sketching Interface for Sitting-Pose Design. Eurographics Workshop on Sketch-Based Interfaces and Modeling, p.1–8.
Nealen, A., Sorkine, O., Alexa, M., Cohen-Or, D., 2005. A sketch-based interface for detail-preserving mesh editing. ACM Trans. Graph., 24(3):1142–1147.[doi:10. 1145/1073204.1073324]
Ramamoorthi, R., Barr, A.H., 1997. Fast construction of accurate quaternion splines. Comput. Graph., 31(3):287–292. [doi:10.1145/258734.258870]
Shoemake, K., 1985. Animating rotation with quaternion curves. Comput. Graph., 19(3):245–254. [doi:10.1145/325165.325242]
Thorne, M., Burke, D., van de Panne, M., 2004. Motion doodles: an interface for sketching character motion. ACM Trans. Graph., 23(3):424–431. [doi:10.1145/1015706.1015740]
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Project supported by the National Natural Science Foundation of China (No. 61003145) and the Fundamental Research Funds for the Central Universities, China (No. 2009QNA5018)
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Xie, Y., Xu, Ww., Yu, Yz. et al. New Technique: Sketch-based rotation editing. J. Zhejiang Univ. - Sci. C 12, 867–872 (2011). https://doi.org/10.1631/jzus.C1000373
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DOI: https://doi.org/10.1631/jzus.C1000373