基于参数L-系统的油菜花朵与花序生长可视化研究

为奠定油菜品种株型设计仿真基础，应用参数L-系统的原理，提出了甘蓝型油菜花朵和花序可视化生长的L-系统模型框架。通过对田间试验测量数据统计分析和归一化处理，用Sigmoid 5参数函数拟合花轴节间长度和直径的生长，用Weibull 4参数函数拟合花柄长度、直径的生长。采用L-系统和预定义Bezier曲面建模方法构建油菜花朵仿真模型。根据Bezier曲面的算法，构建了油菜花朵花瓣和萼片及其曲面模型。最后以L-Studio4.0为平台、结合VC++实现油菜花朵和花序的可视化生长模拟。结果表明，该方法可以真实生成油菜花朵和花序，真实感基本达到要求。

Visual growth of flower and inflorescence of rapeseed(Brassica napus L.) based on parametric L-system

In order to lay the simulation foundation for variety plant design of rapeseed (Brassica napus L.), the L-system model for rapeseed (Brassica napus L.) was developed by applying parametric L-system and predefined Bézier surface modeling methods to topological model of the flowers and inflorescence. By employing statistical analysis and normalization processing method to the data of field observation, the growth functions of the floral axis and the flower stalk were established through using Sigmoid and Weibull function, respectively. According to the algorithm of Bezier Surface, the petals and sepal of rapeseed flower and their surface models were constructed. Finally, visual growth simulations of the rapeseed flowers and inflorescence were conducted in L-Studio 4.0 platform. The results show that the visual growth process of the rapeseed flowers and inflorescence can be realized by using this method.