为解决大规模场景中绘制实时阴影的问题，提出优化的阴影体算法。

An optimized shadow volume algorithm was developed to render shadow in large-scale scene.

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详细论述了基于模板阴影体算法矢量数据绘制的关键技术，并通过试验验证了该方法的有效性。

The key techniques of the rendering of vector data over 3d terrain based on stencil shadow volume algorithm are detailed and the effectiveness of this method is test-proven.

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提出一种基于模板阴影体算法的矢量数据绘制方法，实现矢量数据在三维场景中的高质量实时叠加显示。

The key technique of vector data render based on stencil shadow volume is discussed and is proved by experiments.

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