基于自由曲面和L-system的红掌生长模型

The anthurium growth model based on free-form surface and L-system

针对红掌花卉生长可视化中参数难以确定的问题进行研究,提出推导控制点的方法,建立红掌器官模型:采用Bezier曲线结合扫描成型的方法来构造叶柄模型,采用双三次NURBS曲线对佛焰苞进行建模;运用红掌的相关表型数据拟合生长函数,提出基于红掌生长规律的微分L-system,可有效模拟红掌的拓扑结构和生长过程;通过虚拟器官表示红掌器官的几何属性,降低微分L-system的复杂度。试验验证提出的方法对红掌各项生长指标拟合度可达0.89以上,并可对每个生长阶段的红掌进行模拟,能有效地对红掌的生长过程进行建模。

Aiming at the difficulty of determining the parameters in visualization of anthurium flower growth,a method for deducing control points was proposed to establish anthurium organ model in this study using Bezier curve combined with scanning molding for the leaf stalk model and bicubic NURBS curve for the flame bud model.The differential L-system based on the growth law of anthurium was proposed to simulate the topological structure and growth process of anthurium effectively by fitting the growth function with the related phenotype data of anthurium.The geometric properties of anthurium organs were represented by virtual organs to reduce the complexity of differential L-system.The experiment verified that the fitting degree of the proposed method for the growth indicators of anthurium were higher than 0.89,and it was able to simulate the growth of anthurium at each growth stage,effectively modeling the whole growth process of anthurium.