虚拟现实环境中的物理模型和仿真及其在农业信息技术中的应用

Physics-based modeling and simulation in VR and their applications in agricultural information technologies

虚拟现实技术在现代农业信息领域的作用日益凸显,然而当前的农业虚拟现实环境仍然以静态几何模型为主,具有真实物理意义并符合真实环境物理规则的动态模型和交互模式仍然没有普及。基于物理的模型和仿真方法具有机理上的优势,能够在自然环境包括农业生物和农业生产场景的动态建模与真实感交互方面增强虚拟交互的真实感和互动体验的沉浸感。本文阐述了基于物理的建模方法本质和意义,总结了农业虚拟现实环境中的物理建模和仿真的研究进展,分析了基于物理方法在植物形态学、运动学、动力学、生物力学以及环境物理场建模与仿真方面的应用原理和基本方法,并探讨了物理模型和仿真方法在农业虚拟现实乃至农业信息化中的潜在作用和未来的发展趋势。

Virtual reality has become more important in the field of information technologies of modern agricuhure, However, static geometric modeling predominate current VR applications, and dynamic models and interactions of real physical meanings or induced by real world physical rules have yet not been popularized. Because of the advantages by its nature, physics-based models and simulation an promote the reality of natural environment modeling, such as dynamic modeling of animals, plants, production scenes in agriculture, and enhance immersion of interactions in virtual reality. Based on the concept of virtual plant and digital plant, this paper introduces the innate character and significance of the physics-based method. Furthermore, the paper systematically summarizes the research developments of physics-based models and simulations in agricultural virtual reality environment, and analyzes application principles and common algorithms in morphology, kinematics, dynamics, biomechanics and modeling of environmental physical field. Finally, the possible effects and developing trends are discussed.