虚拟环境中产品动态物理模型构建方法的研究

Research on the Construction Method of Product Dynamic Physical Model in Virtual Environment

在虚拟环境中 ,构建的产品模型是一个包含质量、位置、重量、表面变形、表面纹理、硬度、变形模式等多维物理信息的动态物理模型。动态物理模型以直观的物理方式动态、实时响应用户操作 ,具有物理特性与几何模型和行为模型相融合的特征。用离散虚拟对象方法构建了可变形的动态物理模型 ,研究了动态曲面描述、虚拟对象离散的方法 ,对影响物理模型的主要因素进行了讨论。针对雕塑曲面建立了可变形的动态物理模型 。

In virtual environment, construction of a product model is not only a geometric model, but also a dynamic physical one including multidimensional physical information such as mass, weight, surface deformation, surface texture, hardness, deformation mode, etc. Dynamic physical model makes dynamic and real time response to user operation in a visual physical way, and is the fusion of physical characteristics, geometric model and behaviour model. A deformable dynamic physical model is established by discrete virtual object in this paper. Research was made on the methods of dynamic curved surface description and the scattering of virtual object. The major factors that influence the physical model are also discussed. A deformable dynamic physical model of sculpture surface is constructed to verify the model. This research is a valuable exploration to the construction of product dynamic physical model in virtual environment.