应用于网上虚拟解剖的软组织变形模型

提出一种基于几何造型方法的软组织变形模型,并应用于一个基于VRML的网上动物解剖学虚拟实验室系统。在均匀性、各向同性、线弹性、形变假设的基础上,模型采用高斯函数作为变形的基本函数,并提供了用于控制变形范围、变形大小和变形时间的参数,同时对变形过程进行了变速光滑处理。实验结果表明,该模型计算量小,计算复杂度近似为O(n),易于控制变形,可应用于实时性要求高但精确度要求不太高的网上虚拟解剖教学。

A Soft Tissue Deformation Model for Web-Based Virtual Dissection

A geometrically- based soft tissue deformable model is proposed and is applied to a VRML- based animal anatomy virtual laboratory system.Under the uniformity hypothesis,the isotropy hypothesis,the linear- elastic hypothesis and the deformation hypothesis, the model uses Gauss' s Function as the basic function of deformation.It also provides parameters to control the scope, size and time of deformation, and smoothes out the deformation interpolation.Experimental results show that the model has the computation complex- ity of O(n), and is easily controlled by users.The model is suitable for web- based virtual dissection experiment teaching.