【Key words】 3d terrain； real-time cruise； level of detail (LOD)； quadtree；
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Using the GPU rendering functions,improving the visual realism and real-time roaming rates,a large-scale 3D real-time terrain roaming is performed.
同时充分利用GPU的渲染功能,提高可视化的真实感和实时漫游的速率,实现了大规模三维地形的实时漫游。
参考来源 - 基于GPU的真实感地形绘制Virtual real-time navigation of the complicated scene is an important application in visual simulation, which have extensive application outlook in the field of entertainment, touring, education and training, city planning etc.
复杂场景的虚拟实时漫游是视景仿真的一个重要的应用方面，它在娱乐、旅游、教育与培训、城市规划等领域有着广泛的应用前景。
参考来源 - 视景仿真技术的研究与实现Technology of accelerating the rendering speed of virtual scene is other keytechnology for real-time walkthrough in virtual scene.
场景加速技术是实现虚拟场景实时漫游的又一关键技术。
参考来源 - 建筑虚拟实时漫游技术研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
实现了水墨效果的3D角色在3D水墨效果场景中的实时漫游。
We achieved real-time rendering of 3D character models and walk-through of characters in a 3D scene.
实验结果表明该方法较好地实现了地形分块后的三维地形实时漫游。
The experiment results show that this way can achieve good performance on real-time cruising in the terrain which divided as blocks.
文章讨论了虚拟建筑数据的基本特征，对现有的虚拟建筑实时漫游算法进行分类。
This article discusses the feature of the data of Virtual Architecture, and classifies the ever-known algorithms.
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