例如，若输入的是由包含12个顶点的三角形带，那么输出的就是10个三角形。

If the input is a triangle strip primitive containing 12 vertices, for example, the output of this process will be 10 triangles.

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它由输入(定)点的属性：象坐标、线、色、理坐标，然后输出置向CLIP空间的顶点。

It takes an input (flexible) vertex which has properties like position, normal, color, texture co-ordinates and outputs the vertex in the CLIP space.

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