Example Anti-Teleport Vehicle

/*
    Example Anti-Teleport Vehicle
        by AirKite
    Not finished!!!
*/

new Float:OldVehiclePos[2000][4];
new LastCar[500];
#include <a_samp>
stock Float:GetDistanceBetweenPoints(Float:x,Float:y,Float:z,Float:x2,Float:y2,Float:z2)
{
    return floatsqroot(floatpower(floatabs(floatsub(x2,x)),2)+floatpower(floatabs(floatsub(y2,y)),2)+floatpower(floatabs(floatsub(z2,z)),2));
}
public OnUnoccupiedVehicleUpdate(vehicleid, playerid, passenger_seat)
{
    new string[128], Float:vpos_x, Float:vpos_y, Float:vpos_z, Float:vpos_a;
    GetVehiclePos(vehicleid, vpos_x, vpos_y, vpos_z); GetVehicleZAngle(vehicleid,vpos_a);
    if(OldVehiclePos[vehicleid][0] != 0.0 && OldVehiclePos[vehicleid][1] != 0.0 && OldVehiclePos[vehicleid][2] != 0.0 && OldVehiclePos[vehicleid][3] != 0.0)
    {
        new Float:vehicledistance = GetDistanceBetweenPoints(vpos_x, vpos_y, vpos_z, OldVehiclePos[vehicleid][0], OldVehiclePos[vehicleid][1], OldVehiclePos[vehicleid][2]);
        //format(string, sizeof(string), "Update Distance: %f", vehicledistance);
        //SendClientMessage(playerid, 0xFFFFFFFF, string);
        if(vehicledistance > 15.0)
        {
            SetVehiclePos(vehicleid, OldVehiclePos[vehicleid][0], OldVehiclePos[vehicleid][1], OldVehiclePos[vehicleid][2]);
            SetVehicleZAngle(vehicleid,OldVehiclePos[vehicleid][3]);
            return;
        }
    }
    OldVehiclePos[vehicleid][0]=vpos_x;
    OldVehiclePos[vehicleid][1]=vpos_y;
    OldVehiclePos[vehicleid][2]=vpos_z;
    OldVehiclePos[vehicleid][3]=vpos_a;
}
public OnPlayerStateChange(playerid,newstate,oldstate)
{
    if(newstate == PLAYER_STATE_DRIVER)
    {
        LastCar[playerid]=GetPlayerVehicleID(playerid);
    }
    else if(oldstate == PLAYER_STATE_DRIVER)
    {
        new lastveh = LastCar[playerid];
        GetVehiclePos(lastveh,OldVehiclePos[lastveh][0],OldVehiclePos[lastveh][1],OldVehiclePos[lastveh][2]);
        GetVehicleZAngle(lastveh,OldVehiclePos[lastveh][3]);
    }
    return 1;
}