Vehicle's Speed functions

// Km/h functions

#define FLOAT_INFINITY                  (Float:0x7F800000)



stock Float:GetVehicleSpeedFromVelocity(Float:x, Float:y, Float:z)
{
    return floatmul(VectorSize(x, y, z), 180.0);
}

stock Float:GetVehicleSpeed(vehicleid)
{
    static
        Float:x,
        Float:y,
        Float:z;

    return GetVehicleVelocity(vehicleid, x, y, z)
        ? GetVehicleSpeedFromVelocity(x, y, z)
        : FLOAT_INFINITY;
}

stock SetVehicleSpeed(vehicleid, Float:speed)
{
    new
        Float:x,
        Float:y,
        Float:z;

    if (GetVehicleVelocity(vehicleid, x, y, z))
    {
        new
            Float:angle;

        GetVehicleVelocity(vehicleid, x, y, z);
        GetVehicleZAngle(vehicleid, angle);

        speed = floatdiv(speed, 180.0);


        x = floatmul(speed, floatsin(-angle, degrees));
        y = floatmul(speed, floatcos(-angle, degrees));

        SetVehicleVelocity(vehicleid, x, y, z);
    }
    return 0;
}