This command calculates the vector product <uvw 1> X <uvw 2>. The <flag> is a string of three characters that indicates whether the input vectors or the output vector are given in direct or reciprocal space coordinates. The three characters correspond to:
first input vector, second input vector resulting vector
"drd" means: vector one is given in direct space coordinates, vector 2 is in reciprocal space coordinates (hkl) and the resulting vectorproduct is to be given in direct space coordinates
Any combination of "d" and "r" is allowed.
The output vector is stored in the result variable: "res[1]","res[2]","res[3]" vector product of vector 1 and vector 2