Menjac System By: Ranko

//==============================================================================
//   SYSTEM Menjac
// SCRIPTED BY Ranko
//   VERSION v1.0
//==============================================================================

#define FILTERSCRIPT

#include <a_samp>

#define PRESSED(%0) \
        (((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

#define SpeedCheck(%0,%1,%2,%3,%4) floatround(floatsqroot(%4?(%0*%0+%1*%1+%2*%2):(%0*%0+%1*%1) ) *%3*1.6)

new BrzinaLimit[MAX_PLAYERS];
new Brzina[MAX_VEHICLES];
new Text:Brzinatxd[MAX_PLAYERS];

#define MAX_BRZINA 5
#define VOZILO_BRZINA 31

#if defined FILTERSCRIPT

public OnFilterScriptInit()
{
        print("\n--------------------------------------");
        print("       Menjanje brzina by Ranko        ");
        print("--------------------------------------\n");
        return 1;
}

public OnFilterScriptExit()
{
        print("\n--------------------------------------");
        print("       Menjanje brzina by Ranko        ");
        print("--------------------------------------\n");
        return 1;
}

#else

main()
{
   return 1;
}

#endif

public OnGameModeInit()
{
        return 1;
}

public OnGameModeExit()
{
        return 1;
}

public OnPlayerRequestClass(playerid, classid)
{
        return 1;
}

public OnPlayerConnect(playerid)
{
    Brzinatxd[playerid] = TextDrawCreate(558.5,333,"_");
    TextDrawFont(Brzinatxd[playerid], 3);
        TextDrawLetterSize(Brzinatxd[playerid], 0.53, 1.20);
        TextDrawColor(Brzinatxd[playerid], -16776961);
        TextDrawBackgroundColor(Brzinatxd[playerid], 51);
        TextDrawSetOutline(Brzinatxd[playerid], 0);
        TextDrawSetProportional(Brzinatxd[playerid], 1);
        TextDrawSetShadow(Brzinatxd[playerid], 1);
    BrzinaLimit[playerid] = 0;
        return 1;
}

public OnPlayerDisconnect(playerid, reason)
{
    TextDrawDestroy(Brzinatxd[playerid]);
    BrzinaLimit[playerid] = 0;
    return 1;
}

public OnPlayerSpawn(playerid)
{
    BrzinaLimit[playerid] = 0;
    return 1;
}

public OnPlayerDeath(playerid, killerid, reason)
{
    BrzinaLimit[playerid] = 0;
    return 1;
}

public OnVehicleSpawn(vehicleid)
{
    Brzina[vehicleid] = 0;
    return 1;
}

public OnVehicleDeath(vehicleid, killerid)
{
    Brzina[vehicleid] = 0;
    return 1;
}

public OnPlayerText(playerid, text[])
{
    return 1;
}

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
        BrzinaLimit[playerid] = Brzina[vehicleid] * 20;
        if(GetVehicleModel(vehicleid) == 481 || GetVehicleModel(vehicleid) == 509 || GetVehicleModel(vehicleid) == 510)
        {
        BrzinaLimit[playerid] = 999;
        }
        return 1;
}

public OnPlayerExitVehicle(playerid, vehicleid)
{
    BrzinaLimit[playerid] = 0;
    return 1;
}

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if (PRESSED(KEY_YES)) // Brzina visa
    {
        if(!IsPlayerInAnyVehicle(playerid)) return 1;
    new string[128];
    if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 481 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 509 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 510) return 1;
    if(Brzina[GetPlayerVehicleID(playerid)] <= MAX_BRZINA)
    {
    Brzina[GetPlayerVehicleID(playerid)] ++;
        format(string, sizeof(string), "Brzina: %d", Brzina[GetPlayerVehicleID(playerid)]);
        TextDrawSetString(Brzinatxd[playerid], string);
        TextDrawShowForPlayer(playerid, Brzinatxd[playerid]);
        }
    else
    {
    }
    }
    if (PRESSED(KEY_NO)) // Brzina manja
    {
    new string[128];
    if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 481 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 509 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 510) return 1;
    if(Brzina[GetPlayerVehicleID(playerid)] > -1)
    {
    Brzina[GetPlayerVehicleID(playerid)] --;
        format(string, sizeof(string), "Brzina: %d", Brzina[GetPlayerVehicleID(playerid)]);
    if(Brzina[GetPlayerVehicleID(playerid)] == -1)
    {
    }
        TextDrawSetString(Brzinatxd[playerid], string);
        TextDrawShowForPlayer(playerid, Brzinatxd[playerid]);
    }
    }
    return 1;
}
stock ModifyVehicleSpeed(vehicleid,mph)
{
    new Float:Vx,Float:Vy,Float:Vz,Float:DV,Float:multiple;
    GetVehicleVelocity(vehicleid,Vx,Vy,Vz);
    DV = floatsqroot(Vx*Vx + Vy*Vy + Vz*Vz);
    if(DV > 0)
    {
    multiple = ((mph + DV * 100) / (DV * 100));
    return SetVehicleVelocity(vehicleid,Vx*multiple,Vy*multiple,Vz*multiple);
    }
    return 0;
}
stock IsVehicleDrivingBackwards(vehicleid)
{
    new
    Float:Float[3]
    ;
    if(GetVehicleVelocity(vehicleid, Float[1], Float[2], Float[0]))
    {
    GetVehicleZAngle(vehicleid, Float[0]);
    if(Float[0] < 90)
    {
    if(Float[1] > 0 && Float[2] < 0) return true;
    }
    else if(Float[0] < 180)
    {
    if(Float[1] > 0 && Float[2] > 0) return true;
    }
    else if(Float[0] < 270)
    {
    if(Float[1] < 0 && Float[2] > 0) return true;
    }
    else if(Float[1] < 0 && Float[2] < 0) return true;
    }
    return false;
}
stock GetVehicleSpeed(vehicleid, get3d)
{
        new Float:x, Float:y, Float:z;
        GetVehicleVelocity(vehicleid, x, y, z);
        return SpeedCheck(x, y, z, 100.0, get3d);
}

IsAPlane(carid)
{
        switch(GetVehicleModel(carid)) {
                case 592, 577, 511, 512, 593, 520, 553, 476, 519, 460, 513, 548, 425, 417, 487, 488, 497, 563, 447, 469: return 1;
        }
        return 0;
}

public OnPlayerUpdate(playerid)
{
    new string[128];
    BrzinaLimit[playerid] = Brzina[GetPlayerVehicleID(playerid)] * VOZILO_BRZINA;
    if(Brzina[GetPlayerVehicleID(playerid)] == -1)
    {
    BrzinaLimit[playerid] = 0;
    }
    if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
        {
        new a, b, c;
        GetPlayerKeys(playerid, a, b ,c);
        if(IsVehicleDrivingBackwards(GetPlayerVehicleID(playerid)))
        {
        if(Brzina[GetPlayerVehicleID(playerid)] == -1)
        {
        return 1;
        }
        else
        {
        ModifyVehicleSpeed(GetPlayerVehicleID(playerid), - GetVehicleSpeed(GetPlayerVehicleID(playerid), 0));
        }
        }
        if(a == 8 && GetVehicleSpeed(GetPlayerVehicleID(playerid), 0) > BrzinaLimit[playerid])
        {
        if(IsVehicleDrivingBackwards(GetPlayerVehicleID(playerid)))
        {
        if(Brzina[GetPlayerVehicleID(playerid)] != -1) return ModifyVehicleSpeed(GetPlayerVehicleID(playerid), - GetVehicleSpeed(GetPlayerVehicleID(playerid), 0));
        }
        if(!IsVehicleDrivingBackwards(GetPlayerVehicleID(playerid)))
        {
        if(Brzina[GetPlayerVehicleID(playerid)] == -1) return ModifyVehicleSpeed(GetPlayerVehicleID(playerid), - GetVehicleSpeed(GetPlayerVehicleID(playerid), 0));
        }
        new newspeed = GetVehicleSpeed(GetPlayerVehicleID(playerid), 0) - BrzinaLimit[playerid];
        ModifyVehicleSpeed(GetPlayerVehicleID(playerid), -newspeed);
        }
        if(GetVehicleModel(GetPlayerVehicleID(playerid)) != 481 || GetVehicleModel(GetPlayerVehicleID(playerid)) != 509 || GetVehicleModel(GetPlayerVehicleID(playerid)) != 510 || !IsAPlane(GetPlayerVehicleID(playerid)))
        {
        if(IsPlayerConnected(playerid) && IsPlayerInAnyVehicle(playerid))
        {
        TextDrawShowForPlayer(playerid,Brzinatxd[playerid]);
        format(string,sizeof(string),"Brzina: %d",Brzina[GetPlayerVehicleID(playerid)]);
        if(Brzina[GetPlayerVehicleID(playerid)] == -1)
        {
        format(string,sizeof(string),"Brzina: R");
        }
        TextDrawSetString(Brzinatxd[playerid],string);
        }
        }
        else if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 481 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 509 || GetVehicleModel(GetPlayerVehicleID(playerid)) == 510 || !IsAPlane(GetPlayerVehicleID(playerid)))
        {
        BrzinaLimit[playerid] = 999;
        }
        return 1;
        }
        if(!IsPlayerInAnyVehicle(playerid))
        {
        TextDrawHideForPlayer(playerid,Brzinatxd[playerid]);
        }
        return 1;
}