fromComplexArray(complex, storage) {
        const res = storage || new Array(complex.length >>> 1);
        for (let i = 0; i < complex.length; i += 2)
            res[i >>> 1] = complex[i];
        return res;
    }
Converts a complex number representation stored in a Float64Array to an array of real numbers.

@param {Float64Array} complex The complex number representation to be converted.
@param {number[]} [storage] An optional array to store the result in.
@returns {number[]} An array of real numbers representing the input complex number representation.