三维空间中任意多边形的绘制

Arbitrary Surface Objects Rendering in 3D -Space

空间分析是地理信息系统中必不可少的一部分，随着计算机硬件、三维仿真技术的成熟，用户希望将空间分析及其结果在更加直观的三维空间中进行表达。而分析区域或分析结果大部分是以多边形的形式进行表达，因此，需要研究三维空间中任意多边形的绘制方法。本文分析了三维空间中传统多边形绘制方法的局限性，提出了基于三角剖分的任意多边形绘制方法，并进行了算法实现。

Spatial analysis becomes an indispensable part in GIS environment. With the development of computer conditions and three dimensional simulation, users hope to represent the result of spatial analysis in the 3D space, and also most of the analyzing district or analysis results exist in polygon form. Therefore we need to know how to render an arbitrary polygon in 3D scene. This paper investigates the limitations of the traditional algorithms of rendering the polygon area in 3D scene and examines the dissection algorithms of arbitrary polygon.