### 5.8.3 EZ_Vertex{23}f{v} and EZ_Normal3f{v}

`EZ_Vertex23fv` specifies the coordinates of a vertex and `EZ_Normal3fv` specifies the normal vector at a vertex. Arguments are either 2 floats or 3 floats or a pointer to 2 or 3 floats. The normal vector is used in lighting calculations. For example, the following sequence specifies a rectangle.

    EZ_Begin(EZ_QUADS);          /* begin individual quads   */
    EZ_Normal3f(1.0, 0.0, 0.0);  /* set the normal           */
    EZ_Vertex2f(0.0, 1.0);       /* the first vertex         */
    EZ_Vertex2f(1.0, 1.0);
    EZ_Vertex2f(1.0, 0.0);
    EZ_Vertex2f(0.0, 1.0);
    EZ_End();                   /* end the current object  */

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