摘要在以往的网格简化算法中，大多是采用空间几何距离作为简化准则。
Most of the simplification algorithms use a distance metric as simplification criteria.
这种算法以多边形顶点法矢最简化准则为基本依据，能在保证地形视觉效果的前提下，对模型进行大幅度简化。
This algorithm considers the polygon vertex normal predigesting rule as a basic gist. On the precondition of assuring terrain effect, it can predigest models in large extent.
尽管本书中提到的准则对实时开发也同样有效，但所有的示例都是面向业务应用的，并且是对我过去所开发的实际系统的简化。
Although these guidelines also apply to real-time development, all of the examples are business application-oriented, simplifications of actual systems that I have built in the past.
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