Abstract: The research of high-fidelity simulation technology in plant modeling and rendering of virtual large scale forest landscape is a hot and difficult point in landscape performance. This paper proposes a complete solution, which contains collecting texture data, plant simulation modeling and high-fidelity forest simulation of landscape performance. This solution focuses on three aspects of high-fidelity simulation, they are bamboo morphological structure, texture data collection and the natural habitat. With continuously comparing and improving the key elements of bamboo modelling, such as the shape and distribution of bamboo leaves, the faces of model, and the simulation of different perspectives, it proposes three plans of bamboo modelling. According to the comparison of the time of rendering and the usage of memory, it gets the balance method of maximum efficiency and high-fidelity, which solves the computing speed of virtual large scale landscape. According to the real bamboo landscape in Yunnan Province, it uses the multi-layer hybrid illumination simulation technology to build a complete bamboo landscape. This research approaches the target of ensuring high-fidelity forest landscape simulation with improving rendering speed.

Key words: plant simulation, landscape performance, 3D modeling, illumination simulation

摘要： 高真实度大场景植物仿真技术一直是景观表现中虚拟植物仿真建模和渲染研究的热点和难点。提出了一套从贴图数据采集，植物仿真建模到高仿真森林景观表现的完整解决方案。该方案从竹林形态特征结构、贴图数据采集、自然生长环境三个方面实现竹林的高仿真表现。通过竹叶形态、竹叶分布、模型面数、多角度还原度等因素的不断对比和改进，形成三套凤尾竹建模方案。根据渲染时间和内存使用的数据对比，得到了资源最优化真实度最大化的建模方法，解决了大规模虚拟森林模型运算的速度问题；根据云南当地凤尾竹林的实际景观，利用多层次混合光照模拟技术搭建完整的竹林场景，解决了现实环境中复杂的光照模拟问题。最终实现了在提高渲染速度的前提下依然保证高仿真的竹林景观表现效果的目标。

关键词: 植物仿真, 景观表现, 三维建模, 光照模拟