其次，边界轮廓环的三角网格化：层间三角面片填充和端面三角划分。

Secondly, the triangle meshing of contour loops that includes triangle plane filling between layers and section triangle plotting was accomplished.

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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.

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运用计算机绘制虚拟模型的方式有网格、面片以及NURBS等多种；

There are many methods to protract virtual model by computer, for example grid, patch and NURBS and so on;

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