摘要： 利用广义元球变形技术，提出一种基于骨架关节点约束的交互式局部变形方法。该方法提取多边形网格模型的骨架关节点并结合模型骨架图结构确定骨架关节点对应的局部区域，计算三维网格点到骨架节点的欧式距离，将约束区域的最大欧氏距离作为约束半径，得到各骨架节点对应的势函数值，通过控制骨架节点的空间位置给出三角形面片点的新坐标位置。实验结果表明，该方法有效保持多边形网络模型的局部特征，并确保了模型变形的直观性和高效性。

关键词: 骨架关节点约束, 交互式局部变形, Reeb图, 广义元球

Abstract: This paper presents a interactive local deformation method based on skeleton node constraint by using generalized meatball deformation. The method extracts the skeleton nodes of the polygonal mesh models, employs the skeleton structure to determine the local field which the skeleton nodes influence. It computes the Euclidean distance between mesh vertices and skeleton nodes. The maximum Euclidian distance is constraint radius, calculates the potential function for these vertices. The update position of the mesh vertices is computed by handling the space coordinate of the skeleton node. Experimental results show that the method can maintain the local feature of the polygonal mesh models and guarantee the intuitive and efficient of model deformation.

Key words: skeleton joint point constraint, interactive local deformation, Reeb Graph(RG), generalized metaball

中图分类号: 

• TP393