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float Q_rsqrt( float number )
{
    long i;
    float x2, y;
    const float threehalfs = 1.5F;

    x2 = number * 0.5F;
    y = number;
    i = * ( long * ) &y; // evil floating point bit level hacking
    i = 0x5f3759df - ( i >> 1 ); // what the ♥♥♥♥?
    y = * ( float * ) &i;
    y = y * ( threehalfs - ( x2 * y * y ) ); // 1st iteration
    // y = y * ( threehalfs - ( x2 * y * y ) ); // 2nd iteration, this can be removed.

    return y;
}

Mechanical compound eye
Imposed observance. Sentries in the sky
Vigilant lenses. Objectives belied
In blackened heavens covertly they hide

They see you. They see all. They know all indiscretions
Compiler of your dreams, your indignations
Following your every single move
They see you…