QTS 13 - Calculate closest player to your crosshair

/*
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* Game hacking QTS ( Quickie Tip Series )
* no. 13 - Calculate closest player to your crosshair
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* Author: SEGnosis  - GHAnon.net
* Thanks to:
* bitterbanana      - No known site
* Drunken Cheetah   - No known site
* fatboy88      - No known site
* Geek4Ever         - No known site
* learn_more        - www.uc-forum.com
* Novocaine         - http://ilsken.net/blog/?page_id=64
* Philly0494        - No known site
* Roverturbo        - www.uc-forum.com
* SilentKarma       - www.halocoders.com - offline
* Strife        - www.uc-forum.com
* Wieter20      - No known site
*/

//------------------------------------//
float GetAngleDistanceFromYaw( float fYaw, FVect3 vPos, FVect3 vTarget )
{
    FVect2 vDist = { vPos.x - vTarget.x, vPos.z - vTarget.z }; // Get distance total of you and your target
    FView vView; // pitch and yaw float struct

    float fHypot    = VectToHypot( vDist ) + 0.000001f;
    /*
    inline float VectToHypot( FVect2 vPos )
    {
        return sqrt( vPos.x * vPos.x + vPos.y * vPos.y );
    }
    */

    vView.yaw       = acos( ( vDist.y + 0.000001f ) / fHypot ); // Get radian from cosine of you and your target

    if( vDist.x < 0 && vDist.y < 0 || vDist.x < 0 && vDist.y > 0 ) // add based on quadrent
        vView.yaw   = ( PI - vView.yaw );
    else
        vView.yaw   = ( PI + vView.yaw );

    return fabsf( fYaw - vView.yaw ); // return absolute distance from crosshair
}
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