研究了产品的数字化装配模型和虚拟装配场景的构建方法。
The data model of assembly and the methods of establishing the virtual assembly environment were studied.
在构建虚拟现实场景的过程中，优化是很重要的，尤其是显存方面的优化。
Optimization is very important in the process of building a virtual reality scene, especially the optimization in the use of computer memory of display.
以四川资阳场景为试验区域，设计了支持城市概念设计的虚拟城市系统，并构建了虚拟城市景观模型库。
The virtual city system facing the urban conception design can preview the configuration character with realistic virtual scene, which can help the urban designer estimate the design ideology.
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