Pseudo random number generator in HLSL using a hash function from H. Schechter & R. Bridson

Random.hlsl

// Hash function from H. Schechter & R. Bridson, goo.gl/RXiKaH
uint Hash(uint s)
{
    s ^= 2747636419u;
    s *= 2654435769u;
    s ^= s >> 16;
    s *= 2654435769u;
    s ^= s >> 16;
    s *= 2654435769u;
    return s;
}

float Random(uint seed)
{
    return float(Hash(seed)) / 4294967295.0; // 2^32-1
}