Because one vertex can only have one normal, you must duplicate the vertices as well.

由于一个顶点只能有一条法线，所以你还要复制顶点。

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The three vertices of the iron triangle collapse into one vertex of the Agile triangle called constraints.

传统铁三角的三个顶点转变为“敏捷三角形”的一个顶点，被称为约束。

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The constructor of VertexArray takes the number of vertices (eight), the number of components per vertex (x, y, z), and the size of each component (one byte).

VertexArray构造函数中保存了顶点数量(8个)、各顶点的组件数(x, y, z)以及各组件的大小(1字节)。

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