与环境交互的根系动态生长可视化算法  

Visualization of Growing Dynamically of Root System Interacting with Environment

作　　者：杨猛[1,2] 肖成 YANG Meng;XIAO Cheng(School of Information Science and Technology,Beijing Forestry University,Beijing 100083,China;Engineering Research Center for Forestry-oriented Intelligent Information Processing,National Forestry and Grassland Administration,Beijing 100083,China)

机构地区：[1]北京林业大学信息学院,北京100083 [2]国家林业和草原局林业智能信息处理工程技术研究中心,北京100083

出　　处：《农业机械学报》2022年第7期275-281,300,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2019YFC1521104);国家自然科学基金项目(61402038);北京市社会科学基金项目(17YTC030);中央高校基本科研业务费专项资金项目(2015ZCQXX、2017JC10)。

摘　　要：为结合环境因素进行植物根系三维建模,分析根系生长机理,提出了一种模拟根系与环境交互的动态生长可视化算法。该算法以根尖与环境的交互为主导,首先计算每个根尖吸收到的养分含量,再根据内部资源分配机制并采用环境影响的缩放函数调节根尖的伸长率与侧根密度,同时结合所受到的向性与障碍物的阻挡因素,实时调整生长方向。提供了根茎形状与根系整体形态的控制方法,包括编辑根茎形状的模板曲线、设定资源分配权重和向性权重等。对不同类型的根系,以及不同土壤环境下(包括各种养分分布、障碍物与盆壁影响)的根系进行了模拟实验。实验结果表明,所提出的算法具有为多类植物根系建模的泛化能力,并且能够合理地表现与环境的交互过程。Visual simulation of root system growth,an important approach to analyze the root system growth mechanism affected by the surrounding environment,is a significant task in the fields of computer graphics and botanical research,especially in agriculture and forestry.A modeling approach was presented to simulate the interaction between root system growth and the environment.This approach was dominated by the interaction of the root tips with the environment,and regulated by an internal resource allocation mechanism.Firstly,the nutrients absorbed by each root tip were calculated,and then the elongation rate and lateral root density of the root tip were regulated through internal resource allocation mechanism and the scaling function of environmental influence,while adjusting the growth direction of the root tip in real time by considering the blocking factors of the tropisms and obstacles.In addition,the approach provided several ways to control the shape of a root stem and its overall morphology of the root system,including editing the template curve,setting resource allocation weights and directional weights,etc.In the experiments,the root systems of different species were firstly simulated,followed by simulations of root systems in different soil environments,including various nutrient distributions and the influence of obstacles and pot walls.The results showed that the proposed approach had the ability to generalize the realistic models for multiple types of root systems for plants,while effectively representing a reasonable interaction response with the environment in a real-time way.

关 键 词：植物根系 三维模型 生长模拟 环境交互 可视化 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] Q945.12[自动化与计算机技术—计算机科学与技术]