RealCop228 / Slice's Speedcap FS - Include Version

/*
    Vehicle speed cap filterscript.
    -----------
    This makes it possible to limit the maxspeed of vehicles; there are, however, a few things to consider.
    * This will not work well on people with high pings.
    * This works best with lower server rates.
    * Driving at the speed limit will cause the handling to be different; however, if
      used for roleplay, driving real-life like shouldn't be an issue with this at all!

    How do I get started with this?

    First off,
    Try it on to see if it works. Load the filterscript, go ingame, and log in with /rcon login.
    Now, use the testing command /myspeedcap to see if it works. An example of a value that feels like 50 km/h is 0.3.

    So, simply:
        /myspeedcap 0.3

    Put the macros below in your other scripts and do this for example:
        SetPlayerSpeedCap( playerid, 0.3 );

    Another example that disables speed cap only for the NRG:
        public OnPlayerEnterVehicle( playerid, vehicleid, ispassenger )
        {
            new modelid = GetVehicleModel( vehicleid );

            if ( modelid == 522 ) // 522 - NRG-500
                SetPlayerSpeedCap( playerid, 0.4 );
            else
                DisablePlayerSpeedCap( playerid );
        }

    Put this in other scripts so they can change the speed cap easily.

    #define SetPlayerSpeedCap(%0,%1) CallRemoteFunction( "SetPlayerSpeedCap", "if", %0, %1 )
    #define DisablePlayerSpeedCap(%0) CallRemoteFunction( "DisablePlayerSpeedCap", "i", %0 )

    Author: Slice
*/

#include <YSI\y_hooks>

forward SetPlayerSpeedCap( playerid, Float:value );
forward DisablePlayerSpeedCap( playerid );

new
    Float:g_fSpeedCap[ MAX_PLAYERS ] = { 0.0, ... }
;

hook OnPlayerUpdate( playerid )
{
    static
        s_iVehicle
    ;

    if ( g_fSpeedCap[ playerid ] != 0.0 && GetPlayerState( playerid ) == PLAYER_STATE_DRIVER )
    {
        s_iVehicle = GetPlayerVehicleID( playerid );

        if ( s_iVehicle )
        {
            static
                Float:s_fX,
                Float:s_fY,
                Float:s_fZ,
                Float:s_fVX,
                Float:s_fVY,
                Float:s_fVZ
            ;

            GetVehiclePos( s_iVehicle, s_fX, s_fY, s_fZ );
            GetVehicleVelocity( s_iVehicle, s_fVX, s_fVY, s_fVZ );

            if ( !IsPlayerInRangeOfPoint( playerid, g_fSpeedCap[ playerid ] + 0.05, s_fX + s_fVX, s_fY + s_fVY, s_fZ + s_fVZ ) )
            {
                static
                    Float:s_fLength
                ;

                s_fLength = floatsqroot( ( s_fVX * s_fVX ) + ( s_fVY * s_fVY ) + ( s_fVZ * s_fVZ ) );

                s_fVX = ( s_fVX / s_fLength ) * g_fSpeedCap[ playerid ];
                s_fVY = ( s_fVY / s_fLength ) * g_fSpeedCap[ playerid ];
                s_fVZ = ( s_fVZ / s_fLength ) * g_fSpeedCap[ playerid ];

                if ( s_iVehicle )
                    SetVehicleVelocity( s_iVehicle, s_fVX, s_fVY, s_fVZ );
                else
                    SetPlayerVelocity( playerid, s_fVX, s_fVY, s_fVZ );
            }
        }
    }

    return 1;
}

hook OnPlayerCommandText( playerid, cmdtext[ ] )
{
    if ( !strcmp( "/myspeedcap", cmdtext, true, 11 ) )
    {
        new
            szMessage[ 24 ]
        ;

        if ( !( cmdtext[ 11 ] && cmdtext[ 12 ] ) )
        {
            SendClientMessage( playerid, -1, "USAGE: /myspeedcap [max speed]" );
            SendClientMessage( playerid, -1, "USAGE: 0 will disable the speed cap." );

            return 1;
        }

        g_fSpeedCap[ playerid ] = floatstr( cmdtext[ 12 ] );

        format( szMessage, sizeof( szMessage ), "* Speed cap: %0.4f", g_fSpeedCap[ playerid ] );

        SendClientMessage( playerid, 0xFFFF00FF, szMessage );

        return 1;
    }

    return 0;
}

public SetPlayerSpeedCap( playerid, Float:value )
{
    if ( 0 <= playerid < sizeof( g_fSpeedCap ) )
        g_fSpeedCap[ playerid ] = value;
}

public DisablePlayerSpeedCap( playerid )
{
    if ( 0 <= playerid < sizeof( g_fSpeedCap ) )
        g_fSpeedCap[ playerid ] = 0.0;
}