【摘要】 为实现聚散或团状植物花序三维建模和可视化仿真,以烟草为例,提出了一种基于分形系统的植物花序可视化仿真方法。通过分析烟草花序的形态结构特征,构建初始分形单元,以仿射变换为基本框架,按照一定的迭代生成算法,分别建立了烟草花序结构与几何模型,并对烟草花序生长进行了模拟。建模过程中,烟草单花的器官几何模型分别用球B样条曲线和参数曲面表示,通过调节对应控制点与参数,重构了不同开花状态下的三维几何模型。实验结果表明,该方法得到的烟草花序模型能充分地表现烟草花序的形态特征,单花器官有较高的真实感,为其他聚散或团状花序的三维可视化提供了技术手段。更多还原

【Abstract】 In order to realize 3D reconstruction and visualized simulation of cyme or group inflorescence.Taking tobacco inflorescence for example,we propose a visualized simulation method for plant inflorescence based on fractal system.Through the analysis of the structure characteristic of tobacco inflorescence,the initial fractal unit is established.with affine transformation as the basic framework,the geometrical and structural growth model of tobacco inflorescence are constructed,according to a certain iterative generation algorithm.During Modeling process,organs of tobacco single flower are respectively represented by ball B-spline curve and parametric surface.By adjusting relative control points and parameters,it can reconstruct three-dimensional geometrical models in different flowering states.The results show that the inflorescence model can reflect it real morphological characteristics,and the single flower models constructed by this method with full details have more realism,and that it provides a new technical means for other similar inflorescence modeling.更多还原