构建三维头发造型的层次多阶约束域算法

摘要

现有头发建模方法通常使用相互孤立的造型约束生成整体发型,当面对较复杂的待建发型时往往无法建立有效的造型约束.针对真实头发造型的层次性和沿发丝逐阶段形变等特点,提出控制显式发丝形变的层次多阶约束域算法,以有效解决采用造型约束交互式构建复杂发型的问题.该方法通过建立分别作用于全局和局部发簇的层次约束域队列,使用多约束域逐阶段控制样例发丝产生复杂形变.此外,结合发丝曲线的最小旋转标架(RMF)和可自定义的空间螺旋线参数方程,为发丝添加细节效果.实验结果表明,与现有方法相比,该方法能够更加有效地构建出丰富、自然的头发造型.%The isolated styling constraints are commonly used in existing hairstyle modeling,and these methods may not work when the hairstyle to be built is complicated enough. Due to the characteristic of layered and stage-by-stage deformation along hair strand,a method of hairstyle modeling with layered multistage constraint domain was presented,by which various of complicated hairstyles can be built with styling constraints interactively. Through the establishment of global and local styling constraint queue on hair wisp, more constraints can be used to generate complicated hair strand deformation properly. Moreover, the rotation minimizing frames (RMF) of hair strand and user-defined parametric e-quations of space spiral are combined to add more detailed appearance. The experiment result shows that rich and natural hairstyle can be built with the method proposed effectively.