针对现有林分可视化方法表现林木多样性不足的问题,以林分调查数据为基础,提出多样性林木三维模型构建方法,实现林分三维模型实时建立,对可视化直观反映林分三维结构状况具有重要意义。提出林木树干三维模拟方法,建立10参数的幂函数冠形控制曲线,形成林木多方向冠形控制模型,基于贝塞尔曲线构建10种形态类型的枝干模型,提出冠形控制下的林木枝干生成算法以及树叶模拟方法,实现了林木多样性三维模型实时构建。以每木调查数据为基础,根据林木形态数据,实时建立了林分三维模型。结果表明:林木冠形多样性模型得到有效构建,林分调查数据可直接为林分三维建模提供数据支持。该方法可实现林木多样性形态与林分特征因子的直观三维模拟。

Aiming at the problem of insufficient ability of existing stand visualization simulation methods for representing tree diversity,a proposed method of constructing tree diversity three-dimensional models and the realized real-time establishment of stand three-dimensional models to visualize and visually reflect the three-dimensional structure of the forest.A three-dimensional simulation method of the trunk was proposed,and a 10-parameter power function for controlling crown curves was established to form a multi-direction crown control model of trees.Based on the Bézier curve,10 types of branch models were constructed.The algorithm of branch generation under crown control and the method of leaf simulation were proposed and the real-time construction of tree diversity three-dimensional model was realized.Based on the survey data of each tree,a stand real-time three-dimensional model was established according to the tree morphological data.The results showed that the canopy diversity model was effectively constructed,and the stand survey data could directly provide data support for the stand three-dimensional modeling.This method can realize the intuitive three-dimensional simulation of the tree diversity morphology and stand characteristic factors.