通过分析该算法的几何原理，构建三角形面片的权值计算公式。
Firstly, the weight's calculation formula of triangle patches is constructed by analyzing its geometric theory.
运用基于块和三角形面片的混合裁剪模式，结合简化的高度差投影计算方法，快速选取适合的地形节点；
Hybrid culling technique based on blocks and triangle faces and simplified computing method for screen-space errors are employed to select appropriate terrain nodes rapidly.
观察上面这个形状相同的网格体：156个三角形面片（右）和726个三角形面片（左）。 726个面片可能听起来不会是很多的多边形，但如果这是在关卡中变成40倍，你会真正开始看到优化后节省下来的面片。
Observe the same shape mesh : 156 triangles (right) vs 726 (left). 726 may not sound like a great deal of polygons, but if this is used 40 times in a level, you will really start to see the savings.
并对其生成的表面几何模型所包含三角面片数量巨大的问题，提出一种快速有效的三角形边收缩算法进行网格简化，提高了表面模型的绘制速度。
Because 3D surface model contains huge number of triangles, a mesh simplification algorithm based on triangle edges shrinkages is presented in this paper to speed up the rendering in real time.
细分曲面算法通常采用三角形、四角形面片，最近基于六角形面片的细分算法成为研究的热点。
Subdivision surface algorithms usually use triangular or quadrilateral meshes. Recently, the hexagonal subdivision algorithm becomes the focus of research.
细分曲面算法通常采用三角形、四角形面片，最近基于六角形面片的细分算法成为研究的热点。
Subdivision surface algorithms usually use triangular or quadrilateral meshes. Recently, the hexagonal subdivision algorithm becomes the focus of research.
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