frob function
Returns Frobenius norm of a mat4
@param {ReadonlyMat4} a the matrix to calculate Frobenius norm of @returns {Number} Frobenius norm
Implementation
double frob(List<double> a) {
return hypot([a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9], a[10], a[11], a[12], a[13], a[14], a[15]]);
}