遮挡裁剪和应用层次细节模型是两种有效的三维复杂场景渲染加速算法。
Occlusion culling and LOD (Level of Details) both are effective techniques in accelerating the rendering process of 3d large scene.
三维复杂场景管理是三维地理信息系统、三维景观系统、拟现实的基础和核心。
Management of complex three-dimensional scene is the basis of3 DGIS, three-dimensional landscape system and virtual reality.
三维复杂场景管理是三维地理信息系统、三维景观系统、拟现实的基础和核心。
The Development and Application of Three-dimensional Geography Information System (3D GIS) in the Field of Forestry Resource Management;
运用此方法可加快三维模型库的建立，对于复杂场景的快速搭建有实际意义。
Using the method can quicken the speed of building solid model bank and has actual significance to build complicated scene fleetly.
大规模复杂场景的快速绘制是虚拟现实、实时仿真和三维交互设计等许多重要应用的底层支撑技术，也是诸多研究领域面临的一个基本问题。
The fast rendering for large-scale and complex scenes is the basis of many important application such as virtual reality, real-time simulation, and so on.
建立LOD模型能很有效地降低数据量和复杂度，实现三维场景的实时处理。
Creating models at multiple level of detail can effectively reduce data amount and complexity and realize real-time processing of the three-dimensional scene.
在铁路线路三维场景中，存在着大量的对称物，如树木、亭子、栏杆等，大部分对称物都属于复杂地物。
There are a lot of symmetry objects in the railway 3d sight, such as tree, georgette, and balustrade and so on.
测试得知，叠加了建筑物、道路、植被的复杂地形的平均生成时间为15.96秒，实现了复杂三维场景的流畅漫游。
The test showed that the average production time overlapped by the complex terrain of buildings, roads and vegetation is 15.96 seconds, thus realized the roam in the complex 3-d scene fluently.
该系统能够跨操作系统平台，快速、交互、非编程的生成复杂的三维场景，从而为消防档案提供三维的机制。
The system can cross the operation plat and create 3d scene quickly and mutually and provide the 3d instrument for fire control.
该系统能够跨操作系统平台，快速、交互、非编程的生成复杂的三维场景，从而为消防档案提供三维的机制。
The system can cross the operation plat and create 3d scene quickly and mutually and provide the 3d instrument for fire control.
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