// by TesT aka Danil
#include        <a_samp>

new SpeedBoost[MAX_PLAYERS];

stock IsKeyJustDown(key, newkeys, oldkeys)
{
        if((newkeys & key) && !(oldkeys & key))
                return 1;

        return 0;
}

stock IsKeyReleased(key, newkeys, oldkeys)
{
        if(!(newkeys & key) && (oldkeys & key))
                return 1;

        return 0;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(IsKeyJustDown(KEY_FIRE, newkeys, oldkeys))
        {
                if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
                {
                        SpeedBoost[playerid] = 1;
                }
        }
        if(IsKeyReleased(KEY_FIRE, newkeys, oldkeys))
        {
            if(SpeedBoost[playerid] > 0)
                {
                        new Float:vx, Float:vy, Float:vz, vehicleid = GetPlayerVehicleID(playerid);
                    GetVehicleVelocity(vehicleid, vx, vy, vz);
                    if(floatabs(vx) < 3 && floatabs(vy) < 3 && floatabs(vz) < 3)
                    {
                        SetVehicleVelocity(vehicleid, vx * 0.95, vy * 0.95, vz * 0.95);
                    }
                    SpeedBoost[playerid] = 0;
                }
        }
        return 1;
}

public OnPlayerUpdate(playerid)
{
        if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
        {
                if(SpeedBoost[playerid] > 0)
                {
                        new Float:vx, Float:vy, Float:vz, vehicleid = GetPlayerVehicleID(playerid);
                    GetVehicleVelocity(vehicleid, vx, vy, vz);
                    if(floatabs(vx) < 3 && floatabs(vy) < 3 && floatabs(vz) < 3)
                    {
                        SetVehicleVelocity(vehicleid, vx * 1.05, vy * 1.05, vz * 1.05);
                    }
                }
        }
        return 1;
}