Because the cube has eight vertices, one way to supply normals would be to specify vectors that point from the cube's center toward its corners, as Figure 7a shows.
由于立方体有8个顶点，支持法线的方法之一就是指定从立方体中心指向各角的向量，如图7a所示。
Because the cube has eight vertices, one way to supply normals would be to specify vectors that point from the cube's center toward its corners, as Figure 7a shows.
由于立方体有8个顶点，支持法线的方法之一就是指定从立方体中心指向各角的向量，如图7a所示。
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