In this paper we give a linear algorithm to compute bipolar orientation, this algorithm is based on the absorption rule presented by Professor Liu Yanpei.

基于刘彦佩教授的吸收规则，构造了一个计算双极定向的线性算法。

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In order to overcome the non-uniform phenomenon and the dependency on orientation when rendering, a block rule by marking the region of interest in objective space is presented.

为解决面标记策略中着色与切割时存在的着色不均和方向依赖性问题，本文通过在物体空间中标记感兴趣区域，提出块标记策略的实时着色与实时切割技术。

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In this paper, we first focus on the CAD-based object model construction and then introduce a rule-based method to precompile this geometrical model into a match tree for 3-d object orientation.

集中阐述了基于CAD的物体模型建立过程，并介绍了一种基于规则的将物体几何模型予编译为匹配树的三维物体定位方法。

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