关键词: 模型轻量化, 装配体, CAD模型

Abstract: With the development on technology of CAD/CAM, the product design, virtual manufacturing and digital prototyping can all be done in the computer, which makes the design of large and complex assembly an essential part in the product design. As these assembly models tend to have a huge number of data, it is extremely inconvenient to process on ordinary PCs. In order to speed up, the large scale assembly model needs simplifying. On the premise of maintaining the style and facade of the system, two simplification methods were proposed: (1) by removing invisible parts from the assembly, (2) by removing the invisible features from the assembly. The proposed methods were based on an algorithm which can directly detect invisible parts or features by pre-rendering the model from multiple view directions and reading the rendered results from the frame buffer. The experimental results show that our methods can correctly remove the invisible parts or features correctly from assembly for simplification.

Key words: model simplification, assembly, CAD model