Spikes

// This is a comment
// uncomment the line below if you want to write a filterscript
#define FILTERSCRIPT

new Float:x, Float:y, Float:z;
new Float:rz;
new spike;
new Spikes;

#include <a_samp>

#if defined FILTERSCRIPT

public OnFilterScriptInit()
{
    return 1;
}

public OnFilterScriptExit()
{
    DestroyObject(spike);
    return 1;
}
#endif

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (!strcmp("/spike", cmdtext))
    {
        if(Spikes == 0)
        {
        GetPlayerPos(playerid,x,y,z);
        GetPlayerFacingAngle(playerid, rz);
        spike = CreateObject(2892, x, y, z-0.8, 0, 0, rz+90);
        SendClientMessage(playerid, 0xFFFFFFFF, "Spike Strip Set!");
        Spikes = 1;
        }
        else
        {
        SendClientMessage(playerid, 0xFFFFFFFF, "There Is Already A Spike Strip Set!");
        }
        return 1;
    }
    return 0;
}

encode_tires(tire1, tire2, tire3, tire4) {

    return tire1 | (tire2 << 1) | (tire3 << 2) | (tire4 << 3);
}

public OnPlayerUpdate(playerid)
{
    if(IsPlayerInAnyVehicle(playerid))
    {
    if(IsPlayerInRangeOfPoint(playerid, 3.0, x, y, z))
    {
    UpdateVehicleDamageStatus(GetPlayerVehicleID(playerid), 0, 0, 0, encode_tires(1, 1, 1, 1));
    DestroyObject(spike);
    Spikes = 0;
    }
    }
    return 1;
    }