Unity 2018 Artificial Intelligence Cookbook - Second Edition

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We should always strive for efficiency. That's why there's another way to deliver a similar result. In this case, we could implement a new member function based on the solution offered by Rabin et al. (refer to the following See also section), as shown in the following code:

public static ulong seed = 61829450; 
public static float Range() 
{ 
    double sum = 0; 
    for (int i = 0; i < 3; i++) 
    { 
        ulong holdseed = seed; 
        seed ^= seed << 13; 
        seed ^= seed >> 17; 
        seed ^= seed << 5; 
        long r = (long)(holdseed * seed); 
        sum += r * (1.0 / 0x7FFFFFFFFFFFFFFF); 
    } 
    return (float)sum; 
}