研究的具体思路为：利用专业三维CAD软件进行实体建模，然后通过与CAD软件进行信息交换来得到实体信息并进行实体重现，以找到一种替代实体建模的方法。
The main idea of this paper is to find a way to reduce the work of development of solid modeling for FEA software by exchanging information with CAD software.
这些算法和数据结构都围绕着一个问题，就是如何减少三维实体的点阵信息，以提高三维图形的显示速度。
The algorithms and the data structure are employed for reducing the grid information of 3d entity, so as to improve the display velocity of the 3d entity.
逐步详细讨论了进行信息预处理、二维实体环重构和三维实体重构时的关键技术。
The key techniques for information pre-treating, reconstruction of 2D loops and 3D entities are discussed in detail step by step.
地理信息库是X- 2000高速三维地形显示系统的重要组成部分，主要对地图和地理实体进行存储和管理。
Geomorphologic information database, which is mainly used to memorize and manage the map and geomorphic objects, is an important section of X-2000 high-speed 3d terrain display system.
地理信息库是X- 2000高速三维地形显示系统的重要组成部分，主要对地图和地理实体进行存储和管理。
Geomorphologic information database, which is mainly used to memorize and manage the map and geomorphic objects, is an important section of X-2000 high-speed 3d terrain display system.
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