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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One texture unit, texture size limited to 512, vertex light count limited to 4.

一个纹理单元，纹理大小限制为512，顶点光数限制为4。

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