个性化编辑的轻量化3维树木模型构建

Construction of lightweight three-dimensional tree models supporting personalization editing

目的 3维树木几何结构和拓扑结构的复杂性,不仅使得真实感3维树木模型的构建过程十分复杂,而且构建的模型文件包含大量的几何数据。针对3维树木模型的构建过程复杂和模型数据量大的问题,提出一种支持骨架个性化编辑的轻量化3维树木模型构建方法。方法该方法在提取树木模型骨架结构的基础上,通过交互方式对3维树木模型的骨架进行个性化编辑以生成3维树木模型的全新骨架结构,并采用枝干和树冠模型的简化方法实现轻量化3维树木模型的构建。结果该方法不仅能快速创建轻量化的3维树木模型,减少3维树木可视化时的模型绘制时间;而且能通过骨架个性化编辑来设计树木的拓扑结构,有助于增加同一品种树木外部表现形态的多样性。结论通过应用表明,本文轻量化3维树木模型构建方法不仅可以构建具有不同表现形态的3维树木模型,而且简化后的3维树木模型可以在无线网络、移动终端等资源有限情况下进行3维树木可视化。

Objective The complexity of the geometry and topological structure of 3D trees not only makes the construction of realistic 3D tree models very complex but also increases data for the points and the faces saved in these model files. As to the complexity of constructing 3D trees and the large volumes of model data,we propose a construction method of lightweight 3D tree models supporting skeleton personalized editing in this paper. Method Based on extracting skeleton structures of existing trees models,this method can personalize 3D tree models through the interaction to generate a new frame structure,and adopts branches and crown simplification to realize the lightweight construction of trees models. Result The method can quickly create lightweight tree models that will reduce the visualization rendering time of 3D tree models as well as personalized edits to design the topological structure of the trees by using skeletons that increase the external form diversity of the same tree varieties. Conclusion The applications show that the construction method of lightweight 3D tree models can not only build 3D tree models with different external forms,but also enable simplified 3D tree models to be visualized in wireless networks,mobile terminals,and other resource-limited circumstances.