6 * From page 19 (page 25 of the PDF) of the GLSL 1.20 spec:
8 * "If an array is indexed with an expression that is not an integral
9 * constant expression, or if an array is passed as an argument to a
10 * function, then its size must be declared before any such use."
14 /* Assume the array is sized in a different compilation unit.
22 gl_Position = an_array[i];