摘要
随着CAD/CAM技术的发展,整个产品的设计、虚拟制造和数字化样机都可在计算机中完成,使得包含大量数据的复杂装配体(即大装配体)的设计成为产品设计过程中的必需元素。由于大装配体模型数据量庞大,在普通PC机中处理极为不便,为了提高处理速度,需要对大装配体模型进行简化。在不改变装配模型格式和整体外观的前提下,提出了两种装配体模型的轻量化方案:1)从装配体中删除隐藏的零部件;2)从装配体中删除隐藏的特征。零件和特征的可见性是通过从多个视点预渲染装配模型,然后读取渲染缓冲区的结果并进行分析而得到。实验结果证实该算法能在不改变CAD模型格式和外观的前提下准确地删除装配体中的隐藏零件和特征。
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.
出处
《计算机应用》
CSCD
北大核心
2013年第6期1719-1722,共4页
journal of Computer Applications
基金
国防"十二.五"基础科研计划项目(2011A1420110074)
