https://scholars.lib.ntu.edu.tw/handle/123456789/117041
標題: | Automatic Animation Skeleton Construction Using Repulsive Force Field | 作者: | Liu, Pin-Chou Wu, Fu-Che Ma, Wan-Chun Liang, Rung-Huei Ouhyoung, Ming |
公開日期: | 1-八月-2003 | 出版社: | 臺北市:國立臺灣大學資訊工程學系 | 摘要: | A method is proposed in this paper to automatically gen-erate the animation skeleton of a model such that the model can be manipulated according to the skeleton. With our method, users can construct the skeleton in a short time, and bring a static model both dynamic and alive. The primary steps of our method are finding skeleton joints, connecting the joints to form an animation skeleton, and binding skin vertices to the skeleton. Initially, a repul-sive force field is constructed inside a given model, and a set of points with local minimal force magnitude are found based on the force field. Then, a modified thinning algo-rithm is applied to generate an initial skeleton, which is further refined to become the final result. When the skeleton construction completes, skin vertices are anchored to the skeleton joints according to the distances between the ver-tices and joints. In order to build the repulsive force field, hundreds of rays are shot radially from positions inside the model, and it leads to that the force field computation takes most of the execution time. Therefore, an octree structure is used to accelerate this process. Currently, the skeleton gen-erated from a typical 3D model with 1000 to 10000 poly-gons takes less than 2 minutes on a Intel Pentium 4 2.4 GHz PC. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006092712290535126 | 其他識別: | 2006092712290535126 |
顯示於: | 資訊工程學系 |
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