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植物真实感动态虚拟仿真不仅是当前现代农业科学与植物学领域面临的难点问题之一,也是计算机应用与虚拟现实技术领域的研究热点.建立基于物理属性的真实感植物动力学模型,并利用基于物理过程的动态虚拟仿真算法是有效提高植物动态模拟真实感效果的途径.基于位置动力学的方法是一种高效模拟物体运动学-动力学过程的新方法,可有效模拟刚体、柔体目标的动态物理过程.建立一种基于位置动力学的植物动态虚拟仿真模型,引入距离约束和角度约束条件,以玉米为例实现自然条件下主要器官、植株和群体的动态虚拟仿真,获得玉米三维可视化仿真结果,与传统的基于质点弹簧模型的模拟方法相比,模拟过程具有较高的执行效率,最后对算法执行效率效果及其局限进行了分析讨论.为植物动态虚拟仿真方法研究提供新的技术参考.“,”Realistic plant dynamic simulation is one of the difficult problems in modem agriculture and botany science.It is also a hot spot in computer science application and virtual reality technology research area.Construction of realistic dynamic model based on plant physical properties and application of dynamic virtual simulation algorithm based on physical process is an effective way to improve reality results.Position-based dynamics is a new method simulating effective modeling method for object kinematics and dynamic process with high efficiency,including dynamic physical process of rigid and flexible targets.This paper constructed a plant dynamic virtual simulation model based on position-dynamics and introduce distance and angle constraint condition by taking maize as an example,so as to realize the dynamic virtual simulation of maize major organ,plant and colony under natural condition and obtain the maize 3-dimensional visual simulation result.This simulation process had higher implementation efficiency comparing to the traditional mass-spring-based models.The presented method provided new references for studying plant dynamic virtual simulation method.