本文介绍了一种用于三维物体隐面剔除的算法，该算法通过将三维物体分解为三角形并从透视视角投影到视图平面上实现。具体步骤包括：1. 将所有三角形投影到视图平面；2. 扫描行线，确定三角形的y轴覆盖范围；3. 扫描列线，确定三角形的x轴覆盖范围；4. 计算不可见部分，实现更真实的三维物体二维显示。
In this paper, objects are constructed by triangles and projected onto the view plane from perspective view point. This paper purpose an algorithm to dispaly 3-d objects in 2-d plane more realism -----------hidden the invisible surface.
1. all triangles are projected to the view plane.
2. scan y line, to find out the triangle's y-occupied table. [try to get the y range of triangle]
3. scan x line, to find out the triangle's x-occupied table. [try to get x range of triangle]
4. hidden part computation: calcuate from the distance computation.
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