基于生长函数的大豆根系生长的三维可视化模拟

植物的可视化模拟与仿真能为植物生长研究提供直观、迅捷的科学研究方法.植物根系在生长介质中的三维空间造型与分布,对水分养分的利用具有十分重要的作用.为了避免植物根系生长环境的不可见性和次要因素的影响,定量地直观地研究根构型的适应性变化,将植物根构型的多个生长函数和植物根系的形态发生模型耦合起来,结合可视化方法,建立了植物根系生长的三维可视化模拟系统.以大豆根系为研究对象,根构型的生长函数采用前期研究已获得的三次多项式形式;形态发生模型采用微分L系统理论编译其生成规则;可视化方法采用一系列连接在一起并平滑处理的圆台代表根轴.系统设计成只需输入三次多项式形式的生长函数的系数,就可直观地、连续地、可控地获得该根系生长的可视化图形和根构型几何参数.

Modeling and visualization of three-dimensional soybean root system growth based on growth functions

Simulation and visualization can provide intuitionistic shortcut for science research methods for plant growth. The three-dimensional architecture and distribution of root systems in the growth medium is crucial to the utilization of water and nutrient. For avoiding the invisibility of the environments of the root systems and the influence of the secondary factors, studying quantificationally and intuitionistically the root systems varying with the soil environments, the interaction of growth functions, morphogenetic models and visualization methods was realized to build the three-dimensional visualization modeling system of the plant root systems. The growth functions of the soybean root systems were proved as the three multinomials that were got by the former research, the morphogenetic models were built by the generative rules of differential L-systems, a string smoothed of the truncated cones were used for modeling the every real root. As soon as the coefficients of the three multinomials of root system growth functions were input, the controllable graphics and the geometrical parameters of the growth of the root systems could be shown veritably and continuously.