InSim.txt

Introduction

InSim.txt is a file found the games doc folder. It is a C++ header file that contains the definition for each packet as well as comments from Scawen as to how each packet should be used.

1. ifndef _ISPACKETS_H_
2. define _ISPACKETS_H_

/////////////////////

// InSim for Live for Speed

// InSim allows communication between up to 8 external programs and LFS.

// TCP or UDP packets can be sent in both directions, LFS reporting various // things about its state, and the external program requesting info and // controlling LFS with special packets, text commands or keypresses.

// NOTE : This text file was written with a TAB size equal to 4 spaces.

// INSIM VERSION NUMBER (updated for version 0.6T) // ====================

const int INSIM_VERSION = 8;

// CHANGES // =======

// Version 0.6T (INSIM_VERSION increased to 8) // ------------ // New value PMO_POSITION for IS_AXM packet to report a blank position // New packet IS_CIM reports a connection's interface mode // New values TTC_SEL_START and TTC_SEL_STOP for IS_TTC // New value PMO_GET_Z for IS_AXM packet to report Z values // New values PMO_SELECTION_REAL, PMO_MOVE_MODIFY, PMO_AVOID_CHECK

// Version 0.6N // ------------ // Added ISS_DIALOG and ISS_TEXT_ENTRY to the ISS state flags // New packet SMALL_LCS - set local car switches (lights, horn, siren)

// Version 0.6M (INSIM_VERSION increased to 7) // ------------ // Backward compatibility system - send INSIM_VERSION in the IS_ISI // Older programs (that send zero) are assumed to require version 6 // New join request system enabled if ISF_REQ_JOIN is set in IS_ISI // IS_JRR can also be used to reset a car at a specified location // Packet IS_CSC to report changes in car state (currently start or stop) // Zbyte added to CarContObject structure to report car's altitude // Zbyte added to IS_OBH so the layout object can be identified // IS_MSO / IS_III / IS_ACR message out packets now have variable size // IS_BFN can now be used to delete a range of buttons with a single packet // New packet IS_OCO can be used to override specific or all start lights // New IS_AXM option PMO_SELECTION to set the current editor selection // Added TTC_SEL to request an IS_AXM with layout editor selection // Added TINY_AXM to request IS_AXM packets for the entire layout // IS_SSH documentation updated as it is no longer only for bmp files // New packet IS_UCO sends info about InSim checkpoints and circles // New packet IS_SLC reports a connection's currently selected car // Packet TINY_SLC to request an IS_SLC for all connections // Added TINY_ALC and SMALL_ALC to get and set allowed cars (like /cars) // Value 5 (out of bounds) added to the IS_HLV packet

// Version 0.6H (INSIM_VERSION increased to 6) // ------------ // IS_REO and IS_NLP increased in size to allow 40 drivers // ObjectInfo Zchar is now Zbyte - see layout file description // ISP_NCI packet added to give host more info about new guest

// Version 0.6C // ------------ // Small change to the in-game usage of IS_REO - only valid after SMALL_VTA // Some more values (CPW / OOS / JOOS / HACK) added to the leave reasons

// Version 0.6B (INSIM_VERSION increased to 5) // ------------ // Lap timing info added to IS_RST (Timing byte) // NLP / MCI minimum time interval reduced to 40 ms (was 50 ms) // IS_VTC now cancels game votes even if the majority has not been reached // IS_MTC (Msg To Connection) now has a variable length (up to 128 characters) // IS_MTC can be sent to all (UCID = 255) and sound effect can be specified // IS_CON reports contact between two cars (if ISF_CON is set) // IS_OBH reports information about any object hit (if ISF_OBH is set) // IS_HLV reports incidents that would violate HLVC (if ISF_HLV is set) // IS_PLC sets allowed cars for individual players // IS_AXM to add / remove / clear autocross objects // IS_ACR reports successful or attempted admin commands // OG_SHIFT and OG_CTRL (keys) bits added to OutGaugePack // New IS_RIP option RIPOPT_FULL_PHYS to use full physics when searching // ISS_SHIFTU_HIGH is no longer used (no high / low view distinction) // FIX : Clutch axis / button was not reported from Controls screen // FIX : TTime in IS_RIP was wrong in mid-joined Multiplayer Replays // FIX : IS_BTN did not allow the documented limit of 240 characters // FIX : OutGaugePack ID was always zero regardless of ID in cfg.txt // FIX : InSim camera with vertical pitch would cause LFS to crash

// Version 0.5Z (no change to INSIM_VERSION) // ------------ // NLP / MCI packets are now output at regular intervals // CCI_LAG bit added to the CompCar structure

// TYPES : (all multi-byte types are PC style - lowest byte first) // =====

// char 1-byte character // byte 1-byte unsigned integer // word 2-byte unsigned integer // short 2-byte signed integer // unsigned 4-byte unsigned integer // int 4-byte signed integer // float 4-byte float

// RaceLaps (rl) : (various meanings depending on range)

// 0 : practice // 1-99 : number of laps... laps = rl // 100-190 : 100 to 1000 laps... laps = (rl - 100) * 10 + 100 // 191-238 : 1 to 48 hours... hours = rl - 190

// InSim PACKETS // =============

// All InSim packets use a four byte header

// Size : total packet size - a multiple of 4 // Type : packet identifier from the ISP_ enum (see below) // ReqI : non zero if the packet is a packet request or a reply to a request // Data : the first data byte

// Spare bytes and Zero bytes must be filled with ZERO

// INITIALISING InSim // ==================

// To initialise the InSim system, type into LFS : /insim xxxxx // where xxxxx is the TCP and UDP port you want LFS to open.

// OR start LFS with the command line option : LFS /insim=xxxxx // This will make LFS listen for packets on that TCP and UDP port.

// TO START COMMUNICATION // ======================

// TCP : Connect to LFS using a TCP connection, then send this packet : // UDP : No connection required, just send this packet to LFS :

struct IS_ISI // InSim Init - packet to initialise the InSim system { byte Size; // 44 byte Type; // ISP_ISI byte ReqI; // If non-zero LFS will send an IS_VER packet byte Zero; // 0

word UDPPort; // Port for UDP replies from LFS (0 to 65535) word Flags; // Bit flags for options (see below)

byte InSimVer; // The INSIM_VERSION used by your program byte Prefix; // Special host message prefix character word Interval; // Time in ms between NLP or MCI (0 = none)

char Admin[16]; // Admin password (if set in LFS) char IName[16]; // A short name for your program };

// NOTE 1) UDPPort field when you connect using UDP :

// zero : LFS sends all packets to the port of the incoming packet // non-zero : LFS sends all packets to the specified UDPPort

// NOTE 2) UDPPort field when you connect using TCP :

// zero : LFS sends NLP / MCI packets using your TCP connection // non-zero : LFS sends NLP / MCI packets to the specified UDPPort

// NOTE 3) Flags field (set the relevant bits to turn on the option) :

1. define ISF_RES_0 1 // bit 0 : spare
2. define ISF_RES_1 2 // bit 1 : spare
3. define ISF_LOCAL 4 // bit 2 : guest or single player
4. define ISF_MSO_COLS 8 // bit 3 : keep colours in MSO text
5. define ISF_NLP 16 // bit 4 : receive NLP packets
6. define ISF_MCI 32 // bit 5 : receive MCI packets
7. define ISF_CON 64 // bit 6 : receive CON packets
8. define ISF_OBH 128 // bit 7 : receive OBH packets
9. define ISF_HLV 256 // bit 8 : receive HLV packets
10. define ISF_AXM_LOAD 512 // bit 9 : receive AXM when loading a layout
11. define ISF_AXM_EDIT 1024 // bit 10 : receive AXM when changing objects
12. define ISF_REQ_JOIN 2048 // bit 11 : process join requests

// In most cases you should not set both ISF_NLP and ISF_MCI flags // because all IS_NLP information is included in the IS_MCI packet.

// The ISF_LOCAL flag is important if your program creates buttons. // It should be set if your program is not a host control system. // If set, then buttons are created in the local button area, so // avoiding conflict with the host buttons and allowing the user // to switch them with SHIFT+B rather than SHIFT+I.

// NOTE 4) InSimVer field :

// Provide the INSIM_VERSION that your program was designed for. // Later LFS versions will try to retain backward compatibility // if it can be provided, within reason. Not guaranteed.

// NOTE 5) Prefix field, if set when initialising InSim on a host :

// Messages typed with this prefix will be sent to your InSim program // on the host (in IS_MSO) and not displayed on anyone's screen.

// ENUMERATIONS FOR PACKET TYPES // =============================

enum // the second byte of any packet is one of these { ISP_NONE, // 0 : not used ISP_ISI, // 1 - instruction : insim initialise ISP_VER, // 2 - info : version info ISP_TINY, // 3 - both ways : multi purpose ISP_SMALL, // 4 - both ways : multi purpose ISP_STA, // 5 - info : state info ISP_SCH, // 6 - instruction : single character ISP_SFP, // 7 - instruction : state flags pack ISP_SCC, // 8 - instruction : set car camera ISP_CPP, // 9 - both ways : cam pos pack ISP_ISM, // 10 - info : start multiplayer ISP_MSO, // 11 - info : message out ISP_III, // 12 - info : hidden /i message ISP_MST, // 13 - instruction : type message or /command ISP_MTC, // 14 - instruction : message to a connection ISP_MOD, // 15 - instruction : set screen mode ISP_VTN, // 16 - info : vote notification ISP_RST, // 17 - info : race start ISP_NCN, // 18 - info : new connection ISP_CNL, // 19 - info : connection left ISP_CPR, // 20 - info : connection renamed ISP_NPL, // 21 - info : new player (joined race) ISP_PLP, // 22 - info : player pit (keeps slot in race) ISP_PLL, // 23 - info : player leave (spectate - loses slot) ISP_LAP, // 24 - info : lap time ISP_SPX, // 25 - info : split x time ISP_PIT, // 26 - info : pit stop start ISP_PSF, // 27 - info : pit stop finish ISP_PLA, // 28 - info : pit lane enter / leave ISP_CCH, // 29 - info : camera changed ISP_PEN, // 30 - info : penalty given or cleared ISP_TOC, // 31 - info : take over car ISP_FLG, // 32 - info : flag (yellow or blue) ISP_PFL, // 33 - info : player flags (help flags) ISP_FIN, // 34 - info : finished race ISP_RES, // 35 - info : result confirmed ISP_REO, // 36 - both ways : reorder (info or instruction) ISP_NLP, // 37 - info : node and lap packet ISP_MCI, // 38 - info : multi car info ISP_MSX, // 39 - instruction : type message ISP_MSL, // 40 - instruction : message to local computer ISP_CRS, // 41 - info : car reset ISP_BFN, // 42 - both ways : delete buttons / receive button requests ISP_AXI, // 43 - info : autocross layout information ISP_AXO, // 44 - info : hit an autocross object ISP_BTN, // 45 - instruction : show a button on local or remote screen ISP_BTC, // 46 - info : sent when a user clicks a button ISP_BTT, // 47 - info : sent after typing into a button ISP_RIP, // 48 - both ways : replay information packet ISP_SSH, // 49 - both ways : screenshot ISP_CON, // 50 - info : contact between cars (collision report) ISP_OBH, // 51 - info : contact car + object (collision report) ISP_HLV, // 52 - info : report incidents that would violate HLVC ISP_PLC, // 53 - instruction : player cars ISP_AXM, // 54 - both ways : autocross multiple objects ISP_ACR, // 55 - info : admin command report ISP_HCP, // 56 - instruction : car handicaps ISP_NCI, // 57 - info : new connection - extra info for host ISP_JRR, // 58 - instruction : reply to a join request (allow / disallow) ISP_UCO, // 59 - info : report InSim checkpoint / InSim circle ISP_OCO, // 60 - instruction : object control (currently used for lights) ISP_TTC, // 61 - instruction : multi purpose - target to connection ISP_SLC, // 62 - info : connection selected a car ISP_CSC, // 63 - info : car state changed ISP_CIM, // 64 - info : connection's interface mode };

enum // the fourth byte of an IS_TINY packet is one of these { TINY_NONE, // 0 - keep alive : see "maintaining the connection" TINY_VER, // 1 - info request : get version TINY_CLOSE, // 2 - instruction : close insim TINY_PING, // 3 - ping request : external progam requesting a reply TINY_REPLY, // 4 - ping reply : reply to a ping request TINY_VTC, // 5 - both ways : game vote cancel (info or request) TINY_SCP, // 6 - info request : send camera pos TINY_SST, // 7 - info request : send state info TINY_GTH, // 8 - info request : get time in hundredths (i.e. SMALL_RTP) TINY_MPE, // 9 - info : multi player end TINY_ISM, // 10 - info request : get multiplayer info (i.e. ISP_ISM) TINY_REN, // 11 - info : race end (return to race setup screen) TINY_CLR, // 12 - info : all players cleared from race TINY_NCN, // 13 - info request : get NCN for all connections TINY_NPL, // 14 - info request : get all players TINY_RES, // 15 - info request : get all results TINY_NLP, // 16 - info request : send an IS_NLP TINY_MCI, // 17 - info request : send an IS_MCI TINY_REO, // 18 - info request : send an IS_REO TINY_RST, // 19 - info request : send an IS_RST TINY_AXI, // 20 - info request : send an IS_AXI - AutoX Info TINY_AXC, // 21 - info : autocross cleared TINY_RIP, // 22 - info request : send an IS_RIP - Replay Information Packet TINY_NCI, // 23 - info request : get NCI for all guests (on host only) TINY_ALC, // 24 - info request : send a SMALL_ALC (allowed cars) TINY_AXM, // 25 - info request : send IS_AXM packets for the entire layout TINY_SLC, // 26 - info request : send IS_SLC packets for all connections };

enum // the fourth byte of an IS_SMALL packet is one of these { SMALL_NONE, // 0 : not used SMALL_SSP, // 1 - instruction : start sending positions SMALL_SSG, // 2 - instruction : start sending gauges SMALL_VTA, // 3 - report : vote action SMALL_TMS, // 4 - instruction : time stop SMALL_STP, // 5 - instruction : time step SMALL_RTP, // 6 - info : race time packet (reply to GTH) SMALL_NLI, // 7 - instruction : set node lap interval SMALL_ALC, // 8 - both ways : set or get allowed cars (TINY_ALC) SMALL_LCS, // 9 - instruction : set local car switches (lights, horn, siren) };

enum // the fourth byte of an IS_TTC packet is one of these { TTC_NONE, // 0 : not used TTC_SEL, // 1 - info request : send IS_AXM for a layout editor selection TTC_SEL_START, // 2 - info request : send IS_AXM every time the selection changes TTC_SEL_STOP, // 3 - instruction : switch off IS_AXM requested by TTC_SEL_START };

// GENERAL PURPOSE PACKETS - IS_TINY (4 bytes) / IS_SMALL (8 bytes) / IS_TTC (8 bytes) // =======================

// To avoid defining several packet structures that are exactly the same, and to avoid // wasting the ISP_ enumeration, IS_TINY is used at various times when no additional data // other than SubT is required. IS_SMALL is used when an additional integer is needed.

// IS_TINY

struct IS_TINY // General purpose 4 byte packet { byte Size; // 4 byte Type; // ISP_TINY byte ReqI; // 0 unless it is an info request or a reply to an info request byte SubT; // subtype, from TINY_ enumeration (e.g. TINY_RACE_END) };

// IS_SMALL

struct IS_SMALL // General purpose 8 byte packet { byte Size; // 8 byte Type; // ISP_SMALL byte ReqI; // 0 unless it is an info request or a reply to an info request byte SubT; // subtype, from SMALL_ enumeration (e.g. SMALL_SSP)

unsigned UVal; // value (e.g. for SMALL_SSP this would be the OutSim packet rate) };

// IS_TTC

struct IS_TTC // General purpose 8 byte packet (Target To Connection) { byte Size; // 8 byte Type; // ISP_TTC byte ReqI; // 0 unless it is an info request or a reply to an info request byte SubT; // subtype, from TTC_ enumeration (e.g. TTC_SEL)

byte UCID; // connection's unique id (0 = local) byte B1; // B1, B2, B3 may be used in various ways depending on SubT byte B2; byte B3; };

// VERSION REQUEST // ===============

// It is advisable to request version information as soon as you have connected, to // avoid problems when connecting to a host with a later or earlier version. You will // be sent a version packet on connection if you set ReqI in the IS_ISI packet.

// This version packet is sent on request :

struct IS_VER // VERsion { byte Size; // 20 byte Type; // ISP_VERSION byte ReqI; // ReqI as received in the request packet byte Zero;

char Version[8]; // LFS version, e.g. 0.3G char Product[6]; // Product : DEMO / S1 / S2 / S3 byte InSimVer; // InSim version (see below) byte Spare; // Spare };

// To request an IS_VER packet at any time, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_VER (request an IS_VER)

// NOTE : LFS tries to match InSimVer with the version requested in your program's IS_ISI // packet if it is lower than the latest version known to LFS. If backward compatibility // is no longer possible then this version may be higher than your program requested. // In that case your program may not be able to read some packets sent to it by LFS. // If you connect to an older LFS version then InSimVer may be lower than requested.

// ReqI : non-zero (returned in the reply) // SubT : TINY_PING (request a TINY_REPLY)

// CLOSING InSim // =============

// You can send this IS_TINY to close the InSim connection to your program :

// ReqI : 0 // SubT : TINY_CLOSE (close this connection)

// Another InSimInit packet is then required to start operating again.

// You can shut down InSim completely and stop it listening at all by typing /insim=0 // into LFS (or send a MsgTypePack to do the same thing).

// MAINTAINING THE CONNECTION - IMPORTANT // ==========================

// If InSim does not receive a packet for 70 seconds, it will close your connection. // To open it again you would need to send another InSimInit packet.

// LFS will send a blank IS_TINY packet like this every 30 seconds :

// ReqI : 0 // SubT : TINY_NONE (keep alive packet)

// You should reply with a blank IS_TINY packet :

// ReqI : 0 // SubT : TINY_NONE (has no effect other than resetting the timeout)

// NOTE : If you want to request a reply from LFS to check the connection // at any time, you can send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_PING (request a TINY_REPLY)

// LFS will reply with this IS_TINY :

// ReqI : non-zero (as received in the request packet) // SubT : TINY_REPLY (reply to ping)

// STATE REPORTING AND REQUESTS // ============================

// LFS will send an IS_STA any time the info in it changes.

struct IS_STA // STAte { byte Size; // 28 byte Type; // ISP_STA byte ReqI; // ReqI if replying to a request packet byte Zero;

float ReplaySpeed; // 4-byte float - 1.0 is normal speed

word Flags; // ISS state flags (see below) byte InGameCam; // Which type of camera is selected (see below) byte ViewPLID; // Unique ID of viewed player (0 = none)

byte NumP; // Number of players in race byte NumConns; // Number of connections including host byte NumFinished; // Number finished or qualified byte RaceInProg; // 0 - no race / 1 - race / 2 - qualifying

byte QualMins; byte RaceLaps; // see "RaceLaps" near the top of this document byte Spare2; byte Spare3;

char Track[6]; // short name for track e.g. FE2R byte Weather; // 0,1,2... byte Wind; // 0=off 1=weak 2=strong };

// InGameCam is the in game selected camera mode (which is // still selected even if LFS is actually in SHIFT+U mode). // For InGameCam's values, see "View identifiers" below.

// ISS state flags

1. define ISS_GAME 1 // in game (or MPR)
2. define ISS_REPLAY 2 // in SPR
3. define ISS_PAUSED 4 // paused
4. define ISS_SHIFTU 8 // SHIFT+U mode
5. define ISS_DIALOG 16 // in a dialog
6. define ISS_SHIFTU_FOLLOW 32 // FOLLOW view
7. define ISS_SHIFTU_NO_OPT 64 // SHIFT+U buttons hidden
8. define ISS_SHOW_2D 128 // showing 2d display
9. define ISS_FRONT_END 256 // entry screen
10. define ISS_MULTI 512 // multiplayer mode
11. define ISS_MPSPEEDUP 1024 // multiplayer speedup option
12. define ISS_WINDOWED 2048 // LFS is running in a window
13. define ISS_SOUND_MUTE 4096 // sound is switched off
14. define ISS_VIEW_OVERRIDE 8192 // override user view
15. define ISS_VISIBLE 16384 // InSim buttons visible
16. define ISS_TEXT_ENTRY 32768 // in a text entry dialog

// To request an IS_STA at any time, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_SST (Send STate)

// Setting states

// These states can be set by a special packet :

// ISS_SHIFTU_NO_OPT - SHIFT+U buttons hidden // ISS_SHOW_2D - showing 2d display // ISS_MPSPEEDUP - multiplayer speedup option // ISS_SOUND_MUTE - sound is switched off

struct IS_SFP // State Flags Pack { byte Size; // 8 byte Type; // ISP_SFP byte ReqI; // 0 byte Zero;

word Flag; // the state to set byte OffOn; // 0 = off / 1 = on byte Sp3; // spare };

// Other states must be set by using keypresses or messages (see below)

// SCREEN MODE // ===========

// You can send this packet to LFS to set the screen mode :

struct IS_MOD // MODe : send to LFS to change screen mode { byte Size; // 20 byte Type; // ISP_MOD byte ReqI; // 0 byte Zero;

int Bits16; // set to choose 16-bit int RR; // refresh rate - zero for default int Width; // 0 means go to window int Height; // 0 means go to window };

// The refresh rate actually selected by LFS will be the highest available rate // that is less than or equal to the specified refresh rate. Refresh rate can // be specified as zero in which case the default refresh rate will be used.

// If Width and Height are both zero, LFS will switch to windowed mode.

// TEXT MESSAGES AND KEY PRESSES // ==============================

// You can send 64-byte text messages to LFS as if the user had typed them in. // Messages that appear on LFS screen (up to 128 bytes) are reported to the // external program. You can also send simulated keypresses to LFS.

// MESSAGES OUT (FROM LFS) // ------------

struct IS_MSO // MSg Out - system messages and user messages - variable size { byte Size; // 12, 16, 20... 136 depending on Msg byte Type; // ISP_MSO byte ReqI; // 0 byte Zero;

byte UCID; // connection's unique id (0 = host) byte PLID; // player's unique id (if zero, use UCID) byte UserType; // set if typed by a user (see User Values below) byte TextStart; // first character of the actual text (after player name)

char Msg[128]; // 4, 8, 12... 128 characters - last byte is zero };

// User Values (for UserType byte)

enum { MSO_SYSTEM, // 0 - system message MSO_USER, // 1 - normal visible user message MSO_PREFIX, // 2 - hidden message starting with special prefix (see ISI) MSO_O, // 3 - hidden message typed on local pc with /o command MSO_NUM };

// NOTE : Typing "/o MESSAGE" into LFS will send an IS_MSO with UserType = MSO_O

struct IS_III // InsIm Info - /i message from user to host's InSim - variable size { byte Size; // 12, 16, 20... 72 depending on Msg byte Type; // ISP_III byte ReqI; // 0 byte Zero;

byte UCID; // connection's unique id (0 = host) byte PLID; // player's unique id (if zero, use UCID) byte Sp2; byte Sp3;

char Msg[64]; // 4, 8, 12... 64 characters - last byte is zero };

struct IS_ACR // Admin Command Report - a user typed an admin command - variable size { byte Size; // 12, 16, 20... 72 depending on Text byte Type; // ISP_ACR byte ReqI; // 0 byte Zero;

byte UCID; // connection's unique id (0 = host) byte Admin; // set if user is an admin byte Result; // 1 - processed / 2 - rejected / 3 - unknown command byte Sp3;

char Text[64]; // 4, 8, 12... 64 characters - last byte is zero };

// MESSAGES IN (TO LFS) // -----------

struct IS_MST // MSg Type - send to LFS to type message or command { byte Size; // 68 byte Type; // ISP_MST byte ReqI; // 0 byte Zero;

char Msg[64]; // last byte must be zero };

struct IS_MSX // MSg eXtended - like MST but longer (not for commands) { byte Size; // 100 byte Type; // ISP_MSX byte ReqI; // 0 byte Zero;

char Msg[96]; // last byte must be zero };

struct IS_MSL // MSg Local - message to appear on local computer only { byte Size; // 132 byte Type; // ISP_MSL byte ReqI; // 0 byte Sound; // sound effect (see Message Sounds below)

char Msg[128]; // last byte must be zero };

struct IS_MTC // Msg To Connection - hosts only - send to a connection / a player / all { byte Size; // 8 + TEXT_SIZE (TEXT_SIZE = 4, 8, 12... 128) byte Type; // ISP_MTC byte ReqI; // 0 byte Sound; // sound effect (see Message Sounds below)

byte UCID; // connection's unique id (0 = host / 255 = all) byte PLID; // player's unique id (if zero, use UCID) byte Sp2; byte Sp3;

// char Text[TEXT_SIZE]; // up to 128 characters of text - last byte must be zero };

// Message Sounds (for Sound byte)

enum { SND_SILENT, SND_MESSAGE, SND_SYSMESSAGE, SND_INVALIDKEY, SND_ERROR, SND_NUM };

// You can send individual key presses to LFS with the IS_SCH packet. // For standard keys (e.g. V and H) you should send a capital letter. // This does not work with some keys like F keys, arrows or CTRL keys. // You can also use IS_MST with the /press /shift /ctrl /alt commands.

struct IS_SCH // Single CHaracter { byte Size; // 8 byte Type; // ISP_SCH byte ReqI; // 0 byte Zero;

byte CharB; // key to press byte Flags; // bit 0 : SHIFT / bit 1 : CTRL byte Spare2; byte Spare3; };

// CAR SWITCHES // ============

// To operate the local car's lights, horn or siren you can send this IS_SMALL :

// ReqI : 0 // SubT : SMALL_LCS (Local Car Switches) // UVal : Switches (see below)

// Switches bits

// Bits 0 to 7 are a set of flags specifying which values to set. You can set as many // as you like at a time. This is to allow you to set only the values you want to set // while leaving the others to be controlled by the user.

1. define LCS_SET_SIGNALS 1 // bit 0
2. define LCS_SET_FLASH 2 // bit 1
3. define LCS_SET_HEADLIGHTS 4 // bit 2
4. define LCS_SET_HORN 8 // bit 3
5. define LCS_SET_SIREN 0x10 // bit 4

// Depending on the above values, InSim will read some of the following values and try // to set them as required, if a real player is found on the local computer.

// bits 8-9 (Switches & 0x0300) - Signal (0 off / 1 left / 2 right / 3 hazard) // bit 10 (Switches & 0x0400) - Flash // bit 11 (Switches & 0x0800) - Headlights

// bits 16-18 (Switches & 0x070000) - Horn (0 off / 1 to 5 horn type) // bits 20-21 (Switches & 0x300000) - Siren (0 off / 1 fast / 2 slow)

// MULTIPLAYER NOTIFICATION // ========================

// LFS will send this packet when a host is started or joined :

struct IS_ISM // InSim Multi { byte Size; // 40 byte Type; // ISP_ISM byte ReqI; // usually 0 / or if a reply : ReqI as received in the TINY_ISM byte Zero;

byte Host; // 0 = guest / 1 = host byte Sp1; byte Sp2; byte Sp3;

char HName[32]; // the name of the host joined or started };

// On ending or leaving a host, LFS will send this IS_TINY :

// ReqI : 0 // SubT : TINY_MPE (MultiPlayerEnd)

// To request an IS_ISM packet at any time, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_ISM (request an IS_ISM)

// NOTE : If LFS is not in multiplayer mode, the host name in the ISM will be empty.

// VOTE NOTIFY AND CANCEL // ======================

// LFS notifies the external program of any votes to restart or qualify

// The Vote Actions are defined as :

enum { VOTE_NONE, // 0 - no vote VOTE_END, // 1 - end race VOTE_RESTART, // 2 - restart VOTE_QUALIFY, // 3 - qualify VOTE_NUM };

struct IS_VTN // VoTe Notify { byte Size; // 8 byte Type; // ISP_VTN byte ReqI; // 0 byte Zero;

byte UCID; // connection's unique id byte Action; // VOTE_X (Vote Action as defined above) byte Spare2; byte Spare3; };

// When a vote is cancelled, LFS sends this IS_TINY

// ReqI : 0 // SubT : TINY_VTC (VoTe Cancelled)

// When a vote is completed, LFS sends this IS_SMALL

// ReqI : 0 // SubT : SMALL_VTA (VoTe Action) // UVal : action (VOTE_X - Vote Action as defined above)

// You can instruct LFS host to cancel a vote using an IS_TINY

// ReqI : 0 // SubT : TINY_VTC (VoTe Cancel)

// ALLOWED CARS // ============

// To set the allowed cars on the host (like /cars command) you can send this IS_SMALL :

// ReqI : 0 // SubT : SMALL_ALC (ALlowed Cars) // UVal : Cars (see below)

// To find out the allowed cars at any time (on guest or host) send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_ALC (request a SMALL_ALC)

// LFS will reply with this IS_SMALL :

// ReqI : non-zero (as received in the request packet) // SubT : SMALL_ALC (ALlowed Cars) // UVal : Cars (see below)

// You can send a packet to limit the cars that can be used by a given connection // The resulting set of selectable cars is a subset of the cars set to be available // on the host (by the /cars command or SMALL_ALC)

// For example : // Cars = 0 ... no cars can be selected on the specified connection // Cars = 0xffffffff ... all the host's available cars can be selected

struct IS_PLC // PLayer Cars { byte Size; // 12 byte Type; // ISP_PLC byte ReqI; // 0 byte Zero;

byte UCID; // connection's unique id (0 = host / 255 = all) byte Sp1; byte Sp2; byte Sp3;

unsigned Cars; // allowed cars - see below };

// XF GTI - 1 // XR GT - 2 // XR GT TURBO - 4 // RB4 GT - 8 // FXO TURBO - 0x10 // LX4 - 0x20 // LX6 - 0x40 // MRT5 - 0x80 // UF 1000 - 0x100 // RACEABOUT - 0x200 // FZ50 - 0x400 // FORMULA XR - 0x800 // XF GTR - 0x1000 // UF GTR - 0x2000 // FORMULA V8 - 0x4000 // FXO GTR - 0x8000 // XR GTR - 0x10000 // FZ50 GTR - 0x20000 // BMW SAUBER F1.06 - 0x40000 // FORMULA BMW FB02 - 0x80000

// HANDICAPS // =========

// You can send a packet to add mass and restrict the intake on each car model // The same restriction applies to all drivers using a particular car model // This can be useful for creating multi class hosts

struct CarHCP // Car handicaps in 2 bytes - there is an array of these in the HCP (below) { byte H_Mass; // 0 to 200 - added mass (kg) byte H_TRes; // 0 to 50 - intake restriction };

struct IS_HCP // HandiCaPs { byte Size; // 68 byte Type; // ISP_HCP byte ReqI; // 0 byte Zero;

CarHCP Info[32]; // H_Mass and H_TRes for each car : XF GTI = 0 / XR GT = 1 etc };

// RACE TRACKING // =============

// In LFS there is a list of connections AND a list of players in the race // Some packets are related to connections, some players, some both

// If you are making a multiplayer InSim program, you must maintain two lists // You should use the unique identifier UCID to identify a connection

// Each player has a unique identifier PLID from the moment he joins the race, until he // leaves. It's not possible for PLID and UCID to be the same thing, for two reasons :

// 1) there may be more than one player per connection if AI drivers are used // 2) a player can swap between connections, in the case of a driver swap (IS_TOC)

// When all players are cleared from race (e.g. /clear) LFS sends this IS_TINY

// ReqI : 0 // SubT : TINY_CLR (CLear Race)

// When a race ends (return to race setup screen) LFS sends this IS_TINY

// ReqI : 0 // SubT : TINY_REN (Race ENd)

// You can instruct LFS host to cancel a vote using an IS_TINY

// ReqI : 0 // SubT : TINY_VTC (VoTe Cancel)

// The following packets are sent when the relevant events take place :

struct IS_RST // Race STart { byte Size; // 28 byte Type; // ISP_RST byte ReqI; // 0 unless this is a reply to an TINY_RST request byte Zero;

byte RaceLaps; // 0 if qualifying byte QualMins; // 0 if race byte NumP; // number of players in race byte Timing; // lap timing (see below)

char Track[6]; // short track name byte Weather; byte Wind;

word Flags; // race flags (must pit, can reset, etc - see below) word NumNodes; // total number of nodes in the path word Finish; // node index - finish line word Split1; // node index - split 1 word Split2; // node index - split 2 word Split3; // node index - split 3 };

// Lap timing info (for Timing byte)

// bits 6 and 7 (Timing & 0xc0) :

// 0x40 : standard lap timing is being used // 0x80 : custom timing - user checkpoints have been placed // 0xc0 : no lap timing - e.g. open config with no user checkpoints

// bits 0 and 1 (Timing & 0x03) : number of checkpoints if lap timing is enabled

// To request an IS_RST packet at any time, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_RST (request an IS_RST)

struct IS_NCN // New ConN { byte Size; // 56 byte Type; // ISP_NCN byte ReqI; // 0 unless this is a reply to a TINY_NCN request byte UCID; // new connection's unique id (0 = host)

char UName[24]; // username char PName[24]; // nickname

byte Admin; // 1 if admin byte Total; // number of connections including host byte Flags; // bit 2 : remote byte Sp3; };

struct IS_NCI // New Conn Info - sent on host only if an admin password has been set { byte Size; // 16 byte Type; // ISP_NCI byte ReqI; // 0 unless this is a reply to a TINY_NCI request byte UCID; // connection's unique id (0 = host)

byte Language; // see below : Languages byte Sp1; byte Sp2; byte Sp3;

unsigned UserID; // LFS UserID unsigned IPAddress; };

struct IS_SLC // SeLected Car - sent when a connection selects a car (empty if no car) { byte Size; // 8 byte Type; // ISP_SLC byte ReqI; // 0 unless this is a reply to a TINY_SLC request byte UCID; // connection's unique id (0 = host)

char CName[4]; // car name };

// NOTE : If a new guest joins and does have a car selected then an IS_SLC will be sent

struct IS_CIM // Conn Interface Mode { byte Size; // 8 byte Type; // ISP_CIM byte ReqI; // 0 byte UCID; // connection's unique id (0 = local)

byte Mode; // mode identifier (see below) byte SubMode; // submode identifier (see below) byte SelType; // selected object type (see below) byte Sp3; };

// Mode identifiers

enum { CIM_NORMAL, // 0 - not in a special mode CIM_OPTIONS, // 1 CIM_HOST_OPTIONS, // 2 CIM_GARAGE, // 3 CIM_CAR_SELECT, // 4 CIM_TRACK_SELECT, // 5 CIM_SHIFTU, // 6 - free view mode CIM_NUM };

// Submode identifiers for CIM_NORMAL

enum { NRM_NORMAL, NRM_WHEEL_TEMPS, // F9 NRM_WHEEL_DAMAGE, // F10 NRM_LIVE_SETTINGS, // F11 NRM_PIT_INSTRUCTIONS, // F12 NRM_NUM };

// SubMode identifiers for CIM_GARAGE

enum { GRG_INFO, GRG_COLOURS, GRG_BRAKE_TC, GRG_SUSP, GRG_STEER, GRG_DRIVE, GRG_TYRES, GRG_AERO, GRG_PASS, GRG_NUM };

// SubMode identifiers for CIM_SHIFTU

enum { FVM_PLAIN, // no buttons displayed FVM_BUTTONS, // buttons displayed (not editing) FVM_EDIT, // edit mode FVM_NUM };

// SelType is the selected object type or zero if unselected // It may be an AXO_x as in ObjectInfo or one of these :

const int MARSH_IS_CP = 252; // insim checkpoint const int MARSH_IS_AREA = 253; // insim circle const int MARSH_MARSHALL = 254; // restricted area const int MARSH_ROUTE = 255; // route checker

//

struct IS_CNL // ConN Leave { byte Size; // 8 byte Type; // ISP_CNL byte ReqI; // 0 byte UCID; // unique id of the connection which left

byte Reason; // leave reason (see below) byte Total; // number of connections including host byte Sp2; byte Sp3; };

struct IS_CPR // Conn Player Rename { byte Size; // 36 byte Type; // ISP_CPR byte ReqI; // 0 byte UCID; // unique id of the connection

char PName[24]; // new name char Plate[8]; // number plate - NO ZERO AT END! };

struct IS_NPL // New PLayer joining race (if PLID already exists, then leaving pits) { byte Size; // 76 byte Type; // ISP_NPL byte ReqI; // 0 unless this is a reply to an TINY_NPL request byte PLID; // player's newly assigned unique id

byte UCID; // connection's unique id byte PType; // bit 0 : female / bit 1 : AI / bit 2 : remote word Flags; // player flags

char PName[24]; // nickname char Plate[8]; // number plate - NO ZERO AT END!

char CName[4]; // car name char SName[16]; // skin name - MAX_CAR_TEX_NAME byte Tyres[4]; // compounds

byte H_Mass; // added mass (kg) byte H_TRes; // intake restriction byte Model; // driver model byte Pass; // passengers byte

int Spare;

byte SetF; // setup flags (see below) byte NumP; // number in race - ZERO if this is a join request byte Sp2; byte Sp3; };

// NOTE : PType bit 0 (female) is not reported on dedicated host as humans are not loaded // You can use the driver model byte instead if required (and to force the use of helmets)

// Setup flags (for SetF byte)

1. define SETF_SYMM_WHEELS 1
2. define SETF_TC_ENABLE 2
3. define SETF_ABS_ENABLE 4

// More...

struct IS_PLP // PLayer Pits (go to settings - stays in player list) { byte Size; // 4 byte Type; // ISP_PLP byte ReqI; // 0 byte PLID; // player's unique id };

struct IS_PLL // PLayer Leave race (spectate - removed from player list) { byte Size; // 4 byte Type; // ISP_PLL byte ReqI; // 0 byte PLID; // player's unique id };

struct IS_CRS // Car ReSet { byte Size; // 4 byte Type; // ISP_CRS byte ReqI; // 0 byte PLID; // player's unique id };

struct IS_LAP // LAP time { byte Size; // 20 byte Type; // ISP_LAP byte ReqI; // 0 byte PLID; // player's unique id

unsigned LTime; // lap time (ms) unsigned ETime; // total time (ms)

word LapsDone; // laps completed word Flags; // player flags

byte Sp0; byte Penalty; // current penalty value (see below) byte NumStops; // number of pit stops byte Sp3; };

struct IS_SPX // SPlit X time { byte Size; // 16 byte Type; // ISP_SPX byte ReqI; // 0 byte PLID; // player's unique id

unsigned STime; // split time (ms) unsigned ETime; // total time (ms)

byte Split; // split number 1, 2, 3 byte Penalty; // current penalty value (see below) byte NumStops; // number of pit stops byte Sp3; };

struct IS_PIT // PIT stop (stop at pit garage) { byte Size; // 24 byte Type; // ISP_PIT byte ReqI; // 0 byte PLID; // player's unique id

word LapsDone; // laps completed word Flags; // player flags

byte Sp0; byte Penalty; // current penalty value (see below) byte NumStops; // number of pit stops byte Sp3;

byte Tyres[4]; // tyres changed

unsigned Work; // pit work unsigned Spare; };

struct IS_PSF // Pit Stop Finished { byte Size; // 12 byte Type; // ISP_PSF byte ReqI; // 0 byte PLID; // player's unique id

unsigned STime; // stop time (ms) unsigned Spare; };

struct IS_PLA // Pit LAne { byte Size; // 8 byte Type; // ISP_PLA byte ReqI; // 0 byte PLID; // player's unique id

byte Fact; // pit lane fact (see below) byte Sp1; byte Sp2; byte Sp3; };

// IS_CCH : Camera CHange

// To track cameras you need to consider 3 points

// 1) The default camera : VIEW_DRIVER // 2) Player flags : CUSTOM_VIEW means VIEW_CUSTOM at start or pit exit // 3) IS_CCH : sent when an existing driver changes camera

struct IS_CCH // Camera CHange { byte Size; // 8 byte Type; // ISP_CCH byte ReqI; // 0 byte PLID; // player's unique id

byte Camera; // view identifier (see below) byte Sp1; byte Sp2; byte Sp3; };

struct IS_PEN // PENalty (given or cleared) { byte Size; // 8 byte Type; // ISP_PEN byte ReqI; // 0 byte PLID; // player's unique id

byte OldPen; // old penalty value (see below) byte NewPen; // new penalty value (see below) byte Reason; // penalty reason (see below) byte Sp3; };

struct IS_TOC // Take Over Car { byte Size; // 8 byte Type; // ISP_TOC byte ReqI; // 0 byte PLID; // player's unique id

byte OldUCID; // old connection's unique id byte NewUCID; // new connection's unique id byte Sp2; byte Sp3; };

struct IS_FLG // FLaG (yellow or blue flag changed) { byte Size; // 8 byte Type; // ISP_FLG byte ReqI; // 0 byte PLID; // player's unique id

byte OffOn; // 0 = off / 1 = on byte Flag; // 1 = given blue / 2 = causing yellow byte CarBehind; // unique id of obstructed player byte Sp3; };

struct IS_PFL // Player FLags (help flags changed) { byte Size; // 8 byte Type; // ISP_PFL byte ReqI; // 0 byte PLID; // player's unique id

word Flags; // player flags (see below) word Spare; };

struct IS_FIN // FINished race notification (not a final result - use IS_RES) { byte Size; // 20 byte Type; // ISP_FIN byte ReqI; // 0 byte PLID; // player's unique id (0 = player left before result was sent)

unsigned TTime; // race time (ms) unsigned BTime; // best lap (ms)

byte SpA; byte NumStops; // number of pit stops byte Confirm; // confirmation flags : disqualified etc - see below byte SpB;

word LapsDone; // laps completed word Flags; // player flags : help settings etc - see below };

struct IS_RES // RESult (qualify or confirmed finish) { byte Size; // 84 byte Type; // ISP_RES byte ReqI; // 0 unless this is a reply to a TINY_RES request byte PLID; // player's unique id (0 = player left before result was sent)

char UName[24]; // username char PName[24]; // nickname char Plate[8]; // number plate - NO ZERO AT END! char CName[4]; // skin prefix

unsigned TTime; // race time (ms) unsigned BTime; // best lap (ms)

byte SpA; byte NumStops; // number of pit stops byte Confirm; // confirmation flags : disqualified etc - see below byte SpB;

word LapsDone; // laps completed word Flags; // player flags : help settings etc - see below

byte ResultNum; // finish or qualify pos (0 = win / 255 = not added to table) byte NumRes; // total number of results (qualify doesn't always add a new one) word PSeconds; // penalty time in seconds (already included in race time) };

// IS_REO : REOrder - this packet can be sent in either direction

// LFS sends one at the start of every race or qualifying session, listing the start order

// You can send one to LFS in two different ways, to specify the starting order : // 1) In the race setup screen, to immediately rearrange the grid when the packet arrives // 2) In game, just before a restart or exit, to specify the order on the restart or exit // If you are sending an IS_REO in game, you should send it when you receive the SMALL_VTA // informing you that the Vote Action (VOTE_END / VOTE_RESTART / VOTE_QUALIFY) is about // to take place. Any IS_REO received before the SMALL_VTA is sent will be ignored.

struct IS_REO // REOrder (when race restarts after qualifying) { byte Size; // 44 byte Type; // ISP_REO byte ReqI; // 0 unless this is a reply to an TINY_REO request byte NumP; // number of players in race

byte PLID[40]; // all PLIDs in new order };

// To request an IS_REO packet at any time, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_REO (request an IS_REO)

// Pit Lane Facts

enum { PITLANE_EXIT, // 0 - left pit lane PITLANE_ENTER, // 1 - entered pit lane PITLANE_NO_PURPOSE, // 2 - entered for no purpose PITLANE_DT, // 3 - entered for drive-through PITLANE_SG, // 4 - entered for stop-go PITLANE_NUM };

// Pit Work Flags

enum { PSE_NOTHING, // bit 0 (1) PSE_STOP, // bit 1 (2) PSE_FR_DAM, // bit 2 (4) PSE_FR_WHL, // etc... PSE_LE_FR_DAM, PSE_LE_FR_WHL, PSE_RI_FR_DAM, PSE_RI_FR_WHL, PSE_RE_DAM, PSE_RE_WHL, PSE_LE_RE_DAM, PSE_LE_RE_WHL, PSE_RI_RE_DAM, PSE_RI_RE_WHL, PSE_BODY_MINOR, PSE_BODY_MAJOR, PSE_SETUP, PSE_REFUEL, PSE_NUM };

// View identifiers

enum { VIEW_FOLLOW, // 0 - arcade VIEW_HELI, // 1 - helicopter VIEW_CAM, // 2 - tv camera VIEW_DRIVER, // 3 - cockpit VIEW_CUSTOM, // 4 - custom VIEW_MAX };

const int VIEW_ANOTHER = 255; // viewing another car

// Languages

enum { LFS_ENGLISH, // 0 LFS_DEUTSCH, // 1 LFS_PORTUGUESE, // 2 LFS_FRENCH, // 3 LFS_SUOMI, // 4 LFS_NORSK, // 5 LFS_NEDERLANDS, // 6 LFS_CATALAN, // 7 LFS_TURKISH, // 8 LFS_CASTELLANO, // 9 LFS_ITALIANO, // 10 LFS_DANSK, // 11 LFS_CZECH, // 12 LFS_RUSSIAN, // 13 LFS_ESTONIAN, // 14 LFS_SERBIAN, // 15 LFS_GREEK, // 16 LFS_POLSKI, // 17 LFS_CROATIAN, // 18 LFS_HUNGARIAN, // 19 LFS_BRAZILIAN, // 20 LFS_SWEDISH, // 21 LFS_SLOVAK, // 22 LFS_GALEGO, // 23 LFS_SLOVENSKI, // 24 LFS_BELARUSSIAN, // 25 LFS_LATVIAN, // 26 LFS_LITHUANIAN, // 27 LFS_TRADITIONAL_CHINESE, // 28 LFS_SIMPLIFIED_CHINESE, // 29 LFS_JAPANESE, // 30 LFS_KOREAN, // 31 LFS_BULGARIAN, // 32 LFS_LATINO, // 33 LFS_UKRAINIAN, // 34 LFS_INDONESIAN, // 35 LFS_ROMANIAN, // 36 LFS_NUM_LANG // 37 };

// Leave reasons

enum { LEAVR_DISCO, // 0 - none LEAVR_TIMEOUT, // 1 - timed out LEAVR_LOSTCONN, // 2 - lost connection LEAVR_KICKED, // 3 - kicked LEAVR_BANNED, // 4 - banned LEAVR_SECURITY, // 5 - security LEAVR_CPW, // 6 - cheat protection wrong LEAVR_OOS, // 7 - out of sync with host LEAVR_JOOS, // 8 - join OOS (initial sync failed) LEAVR_HACK, // 9 - invalid packet LEAVR_NUM };

// Penalty values (VALID means the penalty can now be cleared)

enum { PENALTY_NONE, // 0 PENALTY_DT, // 1 PENALTY_DT_VALID, // 2 PENALTY_SG, // 3 PENALTY_SG_VALID, // 4 PENALTY_30, // 5 PENALTY_45, // 6 PENALTY_NUM };

// Penalty reasons

enum { PENR_UNKNOWN, // 0 - unknown or cleared penalty PENR_ADMIN, // 1 - penalty given by admin PENR_WRONG_WAY, // 2 - wrong way driving PENR_FALSE_START, // 3 - starting before green light PENR_SPEEDING, // 4 - speeding in pit lane PENR_STOP_SHORT, // 5 - stop-go pit stop too short PENR_STOP_LATE, // 6 - compulsory stop is too late PENR_NUM };

// Player flags

1. define PIF_SWAPSIDE 1
2. define PIF_RESERVED_2 2
3. define PIF_RESERVED_4 4
4. define PIF_AUTOGEARS 8
5. define PIF_SHIFTER 16
6. define PIF_RESERVED_32 32
7. define PIF_HELP_B 64
8. define PIF_AXIS_CLUTCH 128
9. define PIF_INPITS 256
10. define PIF_AUTOCLUTCH 512
11. define PIF_MOUSE 1024
12. define PIF_KB_NO_HELP 2048
13. define PIF_KB_STABILISED 4096
14. define PIF_CUSTOM_VIEW 8192

// Tyre compounds (4 byte order : rear L, rear R, front L, front R)

enum { TYRE_R1, // 0 TYRE_R2, // 1 TYRE_R3, // 2 TYRE_R4, // 3 TYRE_ROAD_SUPER, // 4 TYRE_ROAD_NORMAL, // 5 TYRE_HYBRID, // 6 TYRE_KNOBBLY, // 7 TYRE_NUM };

const int NOT_CHANGED = 255;

// Confirmation flags

1. define CONF_MENTIONED 1
2. define CONF_CONFIRMED 2
3. define CONF_PENALTY_DT 4
4. define CONF_PENALTY_SG 8
5. define CONF_PENALTY_30 16
6. define CONF_PENALTY_45 32
7. define CONF_DID_NOT_PIT 64

1. define CONF_DISQ (CONF_PENALTY_DT | CONF_PENALTY_SG | CONF_DID_NOT_PIT)
2. define CONF_TIME (CONF_PENALTY_30 | CONF_PENALTY_45)

// Race flags

// HOSTF_CAN_VOTE 1 // HOSTF_CAN_SELECT 2 // HOSTF_MID_RACE 32 // HOSTF_MUST_PIT 64 // HOSTF_CAN_RESET 128 // HOSTF_FCV 256 // HOSTF_CRUISE 512

// Passengers byte

// bit 0 female // bit 1 front // bit 2 female // bit 3 rear left // bit 4 female // bit 5 rear middle // bit 6 female // bit 7 rear right

// TRACKING PACKET REQUESTS // ========================

// To request players, connections, results or a single NLP or MCI, send an IS_TINY

// In each case, ReqI must be non-zero, and will be returned in the reply packet

// SubT : TINT_NCN - request all connections // SubT : TINY_NPL - request all players // SubT : TINY_RES - request all results // SubT : TINY_NLP - request a single IS_NLP // SubT : TINY_MCI - request a set of IS_MCI

// OBJECT INFO - for autocross objects - used in some packets and the layout file // ===========

struct ObjectInfo // Info about a single object - explained in the layout file format { short X; short Y;

byte Zbyte; byte Flags; byte Index; byte Heading; };

// JOIN REQUEST - allows external program to decide if a player can join // ============

// Set the ISF_REQ_JOIN flag in the IS_ISI to receive join requests // A join request is seen as an IS_NPL packet with ZERO in the NumP field // An immediate response (e.g. within 1 second) is required using an IS_JRR packet

// In this case, PLID must be zero and JRRAction must be JRR_REJECT or JRR_SPAWN // If you allow the join and it is successful you will then get a normal IS_NPL with NumP set // You can also specify the start position of the car using the StartPos structure

// IS_JRR can also be used to move an existing car to a different location // In this case, PLID must be set, JRRAction must be JRR_RESET or higher and StartPos must be set

struct IS_JRR // Join Request Reply - send one of these back to LFS in response to a join request { byte Size; // 16 byte Type; // ISP_JRR byte ReqI; // 0 byte PLID; // ZERO when this is a reply to a join request - SET to move a car

byte UCID; // set when this is a reply to a join request - ignored when moving a car byte JRRAction; // 1 - allow / 0 - reject (should send message to user) byte Sp2; byte Sp3;

ObjectInfo StartPos; // 0 : use default start point / Flags = 0x80 : set start point };

// To use default start point, StartPos should be filled with zero values

// To specify a start point, StartPos X, Y, Zbyte and Heading should be filled like an autocross // start position, Flags should be 0x80 and Index should be zero

// Values for JRRAction byte

enum { JRR_REJECT, JRR_SPAWN, JRR_2, JRR_3, JRR_RESET, JRR_RESET_NO_REPAIR, JRR_6, JRR_7, };

// AUTOCROSS // =========

// When all objects are cleared from a layout, LFS sends this IS_TINY :

// ReqI : 0 // SubT : TINY_AXC (AutoX Cleared)

// You can request information about the current layout with this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_AXI (AutoX Info)

// The information will be sent back in this packet (also sent when a layout is loaded) :

struct IS_AXI // AutoX Info { byte Size; // 40 byte Type; // ISP_AXI byte ReqI; // 0 unless this is a reply to an TINY_AXI request byte Zero;

byte AXStart; // autocross start position byte NumCP; // number of checkpoints word NumO; // number of objects

char LName[32]; // the name of the layout last loaded (if loaded locally) };

// On false start or wrong route / restricted area, an IS_PEN packet is sent :

// False start : OldPen = 0 / NewPen = PENALTY_30 / Reason = PENR_FALSE_START // Wrong route : OldPen = 0 / NewPen = PENALTY_45 / Reason = PENR_WRONG_WAY

// If an autocross object is hit (2 second time penalty) this packet is sent :

struct IS_AXO // AutoX Object { byte Size; // 4 byte Type; // ISP_AXO byte ReqI; // 0 byte PLID; // player's unique id };

// CAR TRACKING - car position info sent at constant intervals // ============

// IS_NLP - compact, all cars in 1 variable sized packet // IS_MCI - detailed, max 8 cars per variable sized packet

// To receive IS_NLP or IS_MCI packets at a specified interval :

// 1) Set the Interval field in the IS_ISI (InSimInit) packet (40, 50, 60... 8000 ms) // 2) Set one of the flags ISF_NLP or ISF_MCI in the IS_ISI packet

// If ISF_NLP flag is set, one IS_NLP packet is sent...

struct NodeLap // Car info in 6 bytes - there is an array of these in the NLP (below) { word Node; // current path node word Lap; // current lap byte PLID; // player's unique id byte Position; // current race position : 0 = unknown, 1 = leader, etc... };

struct IS_NLP // Node and Lap Packet - variable size { byte Size; // 4 + NumP * 6 (PLUS 2 if needed to make it a multiple of 4) byte Type; // ISP_NLP byte ReqI; // 0 unless this is a reply to an TINY_NLP request byte NumP; // number of players in race

NodeLap Info[40]; // node and lap of each player, 1 to 40 of these (NumP) };

// If ISF_MCI flag is set, a set of IS_MCI packets is sent...

struct CompCar // Car info in 28 bytes - there is an array of these in the MCI (below) { word Node; // current path node word Lap; // current lap byte PLID; // player's unique id byte Position; // current race position : 0 = unknown, 1 = leader, etc... byte Info; // flags and other info - see below byte Sp3; int X; // X map (65536 = 1 metre) int Y; // Y map (65536 = 1 metre) int Z; // Z alt (65536 = 1 metre) word Speed; // speed (32768 = 100 m/s) word Direction; // car's motion if Speed > 0 : 0 = world y direction, 32768 = 180 deg word Heading; // direction of forward axis : 0 = world y direction, 32768 = 180 deg short AngVel; // signed, rate of change of heading : (16384 = 360 deg/s) };

// NOTE 1) Info byte - the bits in this byte have the following meanings :

1. define CCI_BLUE 1 // this car is in the way of a driver who is a lap ahead
2. define CCI_YELLOW 2 // this car is slow or stopped and in a dangerous place

1. define CCI_LAG 32 // this car is lagging (missing or delayed position packets)

1. define CCI_FIRST 64 // this is the first compcar in this set of MCI packets
2. define CCI_LAST 128 // this is the last compcar in this set of MCI packets

// NOTE 2) Heading : 0 = world y axis direction, 32768 = 180 degrees, anticlockwise from above // NOTE 3) AngVel : 0 = no change in heading, 8192 = 180 degrees per second anticlockwise

struct IS_MCI // Multi Car Info - if more than 8 in race then more than one of these is sent { byte Size; // 4 + NumC * 28 byte Type; // ISP_MCI byte ReqI; // 0 unless this is a reply to an TINY_MCI request byte NumC; // number of valid CompCar structs in this packet

CompCar Info[8]; // car info for each player, 1 to 8 of these (NumC) };

// You can change the rate of NLP or MCI after initialisation by sending this IS_SMALL :

// ReqI : 0 // SubT : SMALL_NLI (Node Lap Interval) // UVal : interval (0 means stop, otherwise time interval : 40, 50, 60... 8000 ms)

// CONTACT - reports contacts between two cars if the closing speed is above 0.25 m/s // =======

// Set the ISF_CON flag in the IS_ISI to receive car contact reports

struct CarContact // 16 bytes : one car in a contact - two of these in the IS_CON (below) { byte PLID; byte Info; // like Info byte in CompCar (CCI_BLUE / CCI_YELLOW / CCI_LAG) byte Sp2; // spare char Steer; // front wheel steer in degrees (right positive)

byte ThrBrk; // high 4 bits : throttle / low 4 bits : brake (0 to 15) byte CluHan; // high 4 bits : clutch / low 4 bits : handbrake (0 to 15) byte GearSp; // high 4 bits : gear (15=R) / low 4 bits : spare byte Speed; // m/s

byte Direction; // car's motion if Speed > 0 : 0 = world y direction, 128 = 180 deg byte Heading; // direction of forward axis : 0 = world y direction, 128 = 180 deg char AccelF; // m/s^2 longitudinal acceleration (forward positive) char AccelR; // m/s^2 lateral acceleration (right positive)

short X; // position (1 metre = 16) short Y; // position (1 metre = 16) };

struct IS_CON // CONtact - between two cars (A and B are sorted by PLID) { byte Size; // 40 byte Type; // ISP_CON byte ReqI; // 0 byte Zero;

word SpClose; // high 4 bits : reserved / low 12 bits : closing speed (10 = 1 m/s) word Time; // looping time stamp (hundredths - time since reset - like TINY_GTH)

CarContact A; CarContact B; };

// Set the ISF_OBH flag in the IS_ISI to receive object contact reports

struct CarContOBJ // 8 bytes : car in a contact with an object { byte Direction; // car's motion if Speed > 0 : 0 = world y direction, 128 = 180 deg byte Heading; // direction of forward axis : 0 = world y direction, 128 = 180 deg byte Speed; // m/s byte Zbyte;

short X; // position (1 metre = 16) short Y; // position (1 metre = 16) };

struct IS_OBH // OBject Hit - car hit an autocross object or an unknown object { byte Size; // 24 byte Type; // ISP_OBH byte ReqI; // 0 byte PLID; // player's unique id

word SpClose; // high 4 bits : reserved / low 12 bits : closing speed (10 = 1 m/s) word Time; // looping time stamp (hundredths - time since reset - like TINY_GTH)

CarContOBJ C;

short X; // as in ObjectInfo short Y; // as in ObjectInfo

byte Zbyte; // if OBH_LAYOUT is set : Zbyte as in ObjectInfo byte Sp1; byte Index; // AXO_x as in ObjectInfo or zero if it is an unknown object byte OBHFlags; // see below };

// OBHFlags byte

1. define OBH_LAYOUT 1 // an added object
2. define OBH_CAN_MOVE 2 // a movable object
3. define OBH_WAS_MOVING 4 // was moving before this hit
4. define OBH_ON_SPOT 8 // object in original position

// Set the ISF_HLV flag in the IS_ISI to receive reports of incidents that would violate HLVC

struct IS_HLV // Hot Lap Validity - off track / hit wall / speeding in pits / out of bounds { byte Size; // 16 byte Type; // ISP_HLV byte ReqI; // 0 byte PLID; // player's unique id

byte HLVC; // 0 : ground / 1 : wall / 4 : speeding / 5 : out of bounds byte Sp1; word Time; // looping time stamp (hundredths - time since reset - like TINY_GTH)

CarContOBJ C; };

// CONTROL - reports crossing an InSim checkpoint / entering an InSim circle (from layout) // =======

struct IS_UCO // User Control Object { byte Size; // 28 byte Type; // ISP_UCO byte ReqI; // 0 byte PLID; // player's unique id

byte Sp0; byte UCOAction; byte Sp2; byte Sp3;

unsigned Time; // hundredths of a second since start (as in SMALL_RTP)

CarContOBJ C;

ObjectInfo Info; // Info about the checkpoint or circle (see below) };

// UCOAction byte

enum { UCO_CIRCLE_ENTER, // entered a circle UCO_CIRCLE_LEAVE, // left a circle UCO_CP_FWD, // crossed cp in forward direction UCO_CP_REV, // crossed cp in reverse direction };

// Identifying an InSim checkpoint from the ObjectInfo :

// Index is 252. Checkpoint index (seen in the layout editor) is stored in Flags bits 0 and 1

// 00 = finish line // 01 = 1st checkpoint // 10 = 2nd checkpoint // 11 = 3rd checkpoint

// Note that the checkpoint index has no meaning in LFS and is provided only for your convenience. // If you use many InSim checkpoints you may need to identify them with the X and Y values.

// Identifying an InSim circle from the ObjectInfo :

// Index is 253. The circle index (seen in the layout editor) is stored in the Heading byte.

struct IS_CSC // Car State Changed - reports a change in a car's state (currently start or stop) { byte Size; // 20 byte Type; // ISP_CSC byte ReqI; // 0 byte PLID; // player's unique id

byte Sp0; byte CSCAction; byte Sp2; byte Sp3;

unsigned Time; // hundredths of a second since start (as in SMALL_RTP)

CarContOBJ C; };

// CSCAction byte

enum { CSC_STOP, CSC_START, };

// OBJECT CONTROL - currently used for switching start lights // ==============

struct IS_OCO // Object COntrol { byte Size; // 8 byte Type; // ISP_OCO byte ReqI; // 0 byte Zero;

byte OCOAction; // see below byte Index; // see below byte Identifier; // identify particular start lights objects (0 to 63 or 255 = all) byte Data; // see below };

// OCOAction byte

enum { OCO_ZERO, // reserved OCO_1, // OCO_2, // OCO_3, // OCO_LIGHTS_RESET, // give up control of all lights OCO_LIGHTS_SET, // use Data byte to set the bulbs OCO_LIGHTS_UNSET, // give up control of the specified lights OCO_NUM };

// Index byte specifies which lights you want to override

// Currently the following values are supported :

// AXO_START_LIGHTS (149) // overrides temporary start lights in the layout

1. define OCO_INDEX_MAIN 240 // special value to override the main start light system

// Identifier byte can be used to override groups of temporary start lights

// It refers to the temporary lights identifier (0 to 63) seen in the layout editor

// Data byte specifies particular bulbs using the low 4 bits

// Bulb bit values for the currently available lights :

// OCO_INDEX_MAIN AXO_START_LIGHTS

// bit 0 (1) : red1 bit 0 (1) : red // bit 1 (2) : red2 bit 1 (2) : amber // bit 2 (4) : red3 - // bit 3 (8) : green bit 3 (8) : green

// AUTOCROSS OBJECTS - reporting / adding / removing // =================

// Set the ISF_AXM_LOAD flag in the IS_ISI for info about objects when a layout is loaded. // Set the ISF_AXM_EDIT flag in the IS_ISI for info about objects edited by user or InSim.

// You can also add or remove objects by sending IS_AXM packets. // Some care must be taken with these - please read the notes below.

// You can also get (TTC_SEL) or set (PMO_SELECTION) the current editor selection.

struct IS_AXM // AutoX Multiple objects - variable size { byte Size; // 8 + NumO * 8 byte Type; // ISP_AXM byte ReqI; // 0 unless this is a reply to a TINY_AXM request byte NumO; // number of objects in this packet

byte UCID; // unique id of the connection that sent the packet byte PMOAction; // see below byte PMOFlags; // see below byte Sp3;

ObjectInfo Info[30]; // info about each object, 0 to 30 of these };

// Values for PMOAction byte

enum { PMO_LOADING_FILE, // 0 - sent by the layout loading system only PMO_ADD_OBJECTS, // 1 - adding objects (from InSim or editor) PMO_DEL_OBJECTS, // 2 - delete objects (from InSim or editor) PMO_CLEAR_ALL, // 3 - clear all objects (NumO must be zero) PMO_TINY_AXM, // 4 - a reply to a TINY_AXM request PMO_TTC_SEL, // 5 - a reply to a TTC_SEL request PMO_SELECTION, // 6 - set a connection's layout editor selection PMO_POSITION, // 7 - user pressed O without anything selected PMO_GET_Z, // 8 - request Z values / reply with Z values PMO_NUM };

// Info about the PMOFlags byte

1. define PMO_FILE_END 1
2. define PMO_MOVE_MODIFY 2
3. define PMO_SELECTION_REAL 4
4. define PMO_AVOID_CHECK 8

// PMO_FILE_END

// If PMO_FILE_END is set in a PMO_LOADING_FILE packet, LFS has reached the end of // a layout file which it is loading. The added objects will then be optimised.

// Optimised in this case means that static vertex buffers will be created for all // objects, to greatly improve the frame rate. The problem with this is that when // there are many objects loaded, optimisation causes a significant glitch which can // be long enough to cause a driver who is cornering to lose control and crash.

// PMO_FILE_END can also be set in an IS_AXM with PMOAction of PMO_ADD_OBJECTS. // This causes all objects to be optimised. It is important not to set PMO_FILE_END // in every packet you send to add objects or you will cause severe glitches on the // clients computers. It is ok to have some objects on the track which are not // optimised. So if you have a few objects that are being removed and added // occasionally, the best advice is not to request optimisation at all. Only // request optimisation (by setting PMO_FILE_END) if you have added so many objects // that it is needed to improve the frame rate.

// NOTE 1) LFS makes sure that all objects are optimised when the race restarts. // NOTE 2) In the 'more' section of SHIFT+U there is info about optimised objects.

// If you are using InSim to send many packets of objects (for example loading an // entire layout through InSim) then you must take care of the bandwidth and buffer // overflows. You must not try to send all the objects at once. It's probably good // to use LFS's method of doing this : send the first packet of objects then wait for // the corresponding IS_AXM that will be output when the packet is processed. Then // you can send the second packet and again wait for the IS_AXM and so on.

// PMO_MOVE_MODIFY

// When objects are moved or modified in the layout editor, two IS_AXM packets are // sent. A PMO_DEL_OBJECTS followed by a PMO_ADD_OBJECTS. In this case the flag // PMO_MOVE_MODIFY is set in the PMOFlags byte of both packets.

// PMO_SELECTION_REAL

// If you send an IS_AXM with PMOAction of PMO_SELECTION it is possible for it to be // either a selection of real objects (as if the user selected several objects while // holding the CTRL key) or a clipboard selection (as if the user pressed CTRL+C after // selecting objects). Clipboard is the default selection mode. A real selection can // be set by using the PMO_SELECTION_REAL bit in the PMOFlags byte.

// PMO_AVOID_CHECK

// If you send an IS_AXM with PMOAction of PMO_ADD_OBJECTS you may wish to set the // UCID to one of the guest connections (for example if that user's action caused the // objects to be added). In this case some validity checks are done on the guest's // computer which may report "invalid position" or "intersecting object" and delete // the objects. This can be avoided by setting the PMO_AVOID_CHECK bit.

// To request IS_AXM packets for all layout objects and circles send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_AXM (request IS_AXM packets for the entire layout)

// LFS will send as many IS_AXM packets as needed to describe the whole layout. // If there are no objects or circles, there will be one IS_AXM with zero NumO. // The final IS_AXM packet will have the PMO_FILE_END flag set.

// To request an IS_AXM for a connection's layout editor selection send this IS_TTC :

// ReqI : non-zero (returned in the reply) // SubT : TTC_SEL (request an IS_AXM for the current selection) // UCID : connection (0 = local / non-zero = guest)

// An IS_AXM with PMO_POSITION is sent with a single object in the packet if a user // presses O without any object type selected. Information only - no object is added. // The only valid values in Info are X, Y, Zbyte and Heading.

// PMO_GET_Z can be used to request the resulting Zbyte values for given X, Y, Zbyte // positions listed in the IS_AXM. A similar reply (information only) will be sent // with adjusted Zbyte values. Index and Heading are ignored and set to zero in the // reply. Flags is set to 0x80 if Zbyte was successfully adjusted, zero if not. // Suggested input values for Zbyte are either 240 to get the highest point at X, Y // or you may use the approximate altitude (see layout file format).

// CAR POSITION PACKETS (Initialising OutSim from InSim - See "OutSim" below) // ====================

// To request Car Positions from the currently viewed car, send this IS_SMALL :

// ReqI : 0 // SubT : SMALL_SSP (Start Sending Positions) // UVal : interval (time between updates - zero means stop sending)

// If OutSim has not been setup in cfg.txt, the SSP packet makes LFS send UDP packets // if in game, using the OutSim system as documented near the end of this text file.

// You do not need to set any OutSim values in LFS cfg.txt - OutSim is fully // initialised by the SSP packet.

// The OutSim packets will be sent to the UDP port specified in the InSimInit packet.

// NOTE : OutSim packets are not InSim packets and don't have a 4-byte header.

// DASHBOARD PACKETS (Initialising OutGauge from InSim - See "OutGauge" below) // =================

// To request Dashboard Packets from the currently viewed car, send this IS_SMALL :

// ReqI : 0 // SubT : SMALL_SSG (Start Sending Gauges) // UVal : interval (time between updates - zero means stop sending)

// If OutGauge has not been setup in cfg.txt, the SSG packet makes LFS send UDP packets // if in game, using the OutGauge system as documented near the end of this text file.

// You do not need to set any OutGauge values in LFS cfg.txt - OutGauge is fully // initialised by the SSG packet.

// The OutGauge packets will be sent to the UDP port specified in the InSimInit packet.

// NOTE : OutGauge packets are not InSim packets and don't have a 4-byte header.

// CAMERA CONTROL // ==============

// IN GAME camera control // ----------------------

// You can set the viewed car and selected camera directly with a special packet // These are the states normally set in game by using the TAB and V keys

struct IS_SCC // Set Car Camera - Simplified camera packet (not SHIFT+U mode) { byte Size; // 8 byte Type; // ISP_SCC byte ReqI; // 0 byte Zero;

byte ViewPLID; // Unique ID of player to view byte InGameCam; // InGameCam (as reported in StatePack) byte Sp2; byte Sp3; };

// NOTE : Set InGameCam or ViewPLID to 255 to leave that option unchanged.

// DIRECT camera control // ---------------------

// A Camera Position Packet can be used for LFS to report a camera position and state. // An InSim program can also send one to set LFS camera position in game or SHIFT+U mode.

// Type : "Vec" : 3 ints (X, Y, Z) - 65536 means 1 metre

struct IS_CPP // Cam Pos Pack - Full camera packet (in car OR SHIFT+U mode) { byte Size; // 32 byte Type; // ISP_CPP byte ReqI; // instruction : 0 / or reply : ReqI as received in the TINY_SCP byte Zero;

Vec Pos; // Position vector

word H; // heading - 0 points along Y axis word P; // pitch word R; // roll

byte ViewPLID; // Unique ID of viewed player (0 = none) byte InGameCam; // InGameCam (as reported in StatePack)

float FOV; // 4-byte float : FOV in degrees

word Time; // Time in ms to get there (0 means instant) word Flags; // ISS state flags (see below) };

// The ISS state flags that can be set are :

// ISS_SHIFTU - in SHIFT+U mode // ISS_SHIFTU_FOLLOW - FOLLOW view // ISS_VIEW_OVERRIDE - override user view

// On receiving this packet, LFS will set up the camera to match the values in the packet, // including switching into or out of SHIFT+U mode depending on the ISS_SHIFTU flag.

// If ISS_VIEW_OVERRIDE is set, the in-car view Heading Pitch and Roll (but not FOV) will // be taken from the values in this packet. Otherwise normal in game control will be used.

// Position vector (Vec Pos) - in SHIFT+U mode, Pos can be either relative or absolute.

// If ISS_SHIFTU_FOLLOW is set, it's a following camera, so the position is relative to // the selected car. Otherwise, the position is absolute, as used in normal SHIFT+U mode.

// NOTE : Set InGameCam or ViewPLID to 255 to leave that option unchanged.

// SMOOTH CAMERA POSITIONING // --------------------------

// The "Time" value in the packet is used for camera smoothing. A zero Time means instant // positioning. Any other value (milliseconds) will cause the camera to move smoothly to // the requested position in that time. This is most useful in SHIFT+U camera modes or // for smooth changes of internal view when using the ISS_VIEW_OVERRIDE flag.

// NOTE : You can use frequently updated camera positions with a longer Time value than // the update frequency. For example, sending a camera position every 100 ms, with a // Time value of 1000 ms. LFS will make a smooth motion from the rough inputs.

// If the requested camera mode is different from the one LFS is already in, it cannot // move smoothly to the new position, so in this case the "Time" value is ignored.

// GETTING A CAMERA PACKET // -----------------------

// To GET a CamPosPack from LFS, send this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_SCP (Send Cam Pos)

// LFS will reply with a CamPosPack as described above. You can store this packet // and later send back exactly the same packet to LFS and it will try to replicate // that camera position.

// TIME CONTROL // ============

// Request the current time at any point with this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_GTH (Get Time in Hundredths)

// The time will be sent back in this IS_SMALL :

// ReqI : non-zero (as received in the request packet) // SubT : SMALL_RTP (Race Time Packet) // UVal : Time (hundredths of a second since start of race or replay)

// You can stop or start time in LFS and while it is stopped you can send packets to move // time in steps. Time steps are specified in hundredths of a second. // Warning : unlike pausing, this is a "trick" to LFS and the program is unaware of time // passing so you must not leave it stopped because LFS is unusable in that state. // This packet is not available in live multiplayer mode.

// Stop and Start with this IS_SMALL :

// ReqI : 0 // SubT : SMALL_TMS (TiMe Stop) // UVal : stop (1 - stop / 0 - carry on)

// When STOPPED, make time step updates with this IS_SMALL :

// ReqI : 0 // SubT : SMALL_STP (STeP) // UVal : number (number of hundredths of a second to update)

// REPLAY CONTROL // ==============

// You can load a replay or set the position in a replay with an IS_RIP packet. // Replay positions and lengths are specified in hundredths of a second. // LFS will reply with another IS_RIP packet when the request is completed.

struct IS_RIP // Replay Information Packet { byte Size; // 80 byte Type; // ISP_RIP byte ReqI; // request : non-zero / reply : same value returned byte Error; // 0 or 1 = OK / other values are listed below

byte MPR; // 0 = SPR / 1 = MPR byte Paused; // request : pause on arrival / reply : paused state byte Options; // various options - see below byte Sp3;

unsigned CTime; // (hundredths) request : destination / reply : position unsigned TTime; // (hundredths) request : zero / reply : replay length

char RName[64]; // zero or replay name - last byte must be zero };

// NOTE about RName : // In a request, replay RName will be loaded. If zero then the current replay is used. // In a reply, RName is the name of the current replay, or zero if no replay is loaded.

// You can request an IS_RIP packet at any time with this IS_TINY :

// ReqI : non-zero (returned in the reply) // SubT : TINY_RIP (Replay Information Packet)

// Error codes returned in IS_RIP replies :

enum { RIP_OK, // 0 - OK : completed instruction RIP_ALREADY, // 1 - OK : already at the destination RIP_DEDICATED, // 2 - can't run a replay - dedicated host RIP_WRONG_MODE, // 3 - can't start a replay - not in a suitable mode RIP_NOT_REPLAY, // 4 - RName is zero but no replay is currently loaded RIP_CORRUPTED, // 5 - IS_RIP corrupted (e.g. RName does not end with zero) RIP_NOT_FOUND, // 6 - the replay file was not found RIP_UNLOADABLE, // 7 - obsolete / future / corrupted RIP_DEST_OOB, // 8 - destination is beyond replay length RIP_UNKNOWN, // 9 - unknown error found starting replay RIP_USER, // 10 - replay search was terminated by user RIP_OOS, // 11 - can't reach destination - SPR is out of sync };

// Options byte : some options

1. define RIPOPT_LOOP 1 // replay will loop if this bit is set
2. define RIPOPT_SKINS 2 // set this bit to download missing skins
3. define RIPOPT_FULL_PHYS 4 // use full physics when searching an MPR

// NOTE : RIPOPT_FULL_PHYS makes MPR searching much slower so should not normally be used. // This flag was added to allow high accuracy MCI packets to be output when fast forwarding.

// SCREENSHOTS // ===========

// You can instuct LFS to save a screenshot in data\shots using the IS_SSH packet. // It will be saved as bmp / jpg / png as set in Misc Options. // Name can be a filename (excluding extension) or zero - LFS will create a name. // LFS will reply with another IS_SSH when the request is completed.

struct IS_SSH // ScreenSHot { byte Size; // 40 byte Type; // ISP_SSH byte ReqI; // request : non-zero / reply : same value returned byte Error; // 0 = OK / other values are listed below

byte Sp0; // 0 byte Sp1; // 0 byte Sp2; // 0 byte Sp3; // 0

char Name[32]; // name of screenshot file - last byte must be zero };

// Error codes returned in IS_SSH replies :

enum { SSH_OK, // 0 - OK : completed instruction SSH_DEDICATED, // 1 - can't save a screenshot - dedicated host SSH_CORRUPTED, // 2 - IS_SSH corrupted (e.g. Name does not end with zero) SSH_NO_SAVE, // 3 - could not save the screenshot };

// BUTTONS // =======

// You can make up to 240 buttons appear on the host or guests (ID = 0 to 239). // You should set the ISF_LOCAL flag (in IS_ISI) if your program is not a host control // system, to make sure your buttons do not conflict with any buttons sent by the host.

// LFS can display normal buttons in these four screens :

// - main entry screen // - race setup screen // - in game // - SHIFT+U mode

// The recommended area for most buttons is defined by :

1. define IS_X_MIN 0
2. define IS_X_MAX 110

1. define IS_Y_MIN 30
2. define IS_Y_MAX 170

// If you draw buttons in this area, the area will be kept clear to // avoid overlapping LFS buttons with your InSim program's buttons. // Buttons outside that area will not have a space kept clear. // You can also make buttons visible in all screens - see below.

// To delete one button or a range of buttons or clear all buttons, send this packet :

struct IS_BFN // Button FunctioN - delete buttons / receive button requests { byte Size; // 8 byte Type; // ISP_BFN byte ReqI; // 0 byte SubT; // subtype, from BFN_ enumeration (see below)

byte UCID; // connection to send to or received from (0 = local / 255 = all) byte ClickID; // if SubT is BFN_DEL_BTN : ID of single button to delete or first button in range byte ClickMax; // if SubT is BFN_DEL_BTN : ID of last button in range (if greater than ClickID) byte Inst; // used internally by InSim };

enum // the fourth byte of IS_BFN packets is one of these { BFN_DEL_BTN, // 0 - instruction : delete one button or range of buttons (must set ClickID) BFN_CLEAR, // 1 - instruction : clear all buttons made by this insim instance BFN_USER_CLEAR, // 2 - info : user cleared this insim instance's buttons BFN_REQUEST, // 3 - user request : SHIFT+B or SHIFT+I - request for buttons };

// NOTE : BFN_REQUEST allows the user to bring up buttons with SHIFT+B or SHIFT+I

// SHIFT+I clears all host buttons if any - or sends a BFN_REQUEST to host instances // SHIFT+B is the same but for local buttons and local instances

// To send a button to LFS, send this variable sized packet

struct IS_BTN // BuTtoN - button header - followed by 0 to 240 characters { byte Size; // 12 + TEXT_SIZE (a multiple of 4) byte Type; // ISP_BTN byte ReqI; // non-zero (returned in IS_BTC and IS_BTT packets) byte UCID; // connection to display the button (0 = local / 255 = all)

byte ClickID; // button ID (0 to 239) byte Inst; // some extra flags - see below byte BStyle; // button style flags - see below byte TypeIn; // max chars to type in - see below

byte L; // left : 0 - 200 byte T; // top : 0 - 200 byte W; // width : 0 - 200 byte H; // height : 0 - 200

// char Text[TEXT_SIZE]; // 0 to 240 characters of text };

// ClickID byte : this value is returned in IS_BTC and IS_BTT packets.

// Host buttons and local buttons are stored separately, so there is no chance of a conflict between // a host control system and a local system (although the buttons could overlap on screen).

// Programmers of local InSim programs may wish to consider using a configurable button range and // possibly screen position, in case their users will use more than one local InSim program at once.

// TypeIn byte : if set, the user can click this button to type in text.

// Lowest 7 bits are the maximum number of characters to type in (0 to 95) // Highest bit (128) can be set to initialise dialog with the button's text

// On clicking the button, a text entry dialog will be opened, allowing the specified number of // characters to be typed in. The caption on the text entry dialog is optionally customisable using // Text in the IS_BTN packet. If the first character of IS_BTN's Text field is zero, LFS will read // the caption up to the second zero. The visible button text then follows that second zero.

// Text : 65-66-67-0 would display button text "ABC" and no caption

// Text : 0-65-66-67-0-68-69-70-71-0-0-0 would display button text "DEFG" and caption "ABC"

// Inst byte : mainly used internally by InSim but also provides some extra user flags

1. define INST_ALWAYS_ON 128 // if this bit is set the button is visible in all screens

// NOTE : You should not use INST_ALWAYS_ON for most buttons. This is a special flag for buttons // that really must be on in all screens (including the garage and options screens). You will // probably need to confine these buttons to the top or bottom edge of the screen, to avoid // overwriting LFS buttons. Most buttons should be defined without this flag, and positioned // in the recommended area so LFS can keep a space clear in the main screens.

// BStyle byte : style flags for the button

1. define ISB_C1 1 // you can choose a standard
2. define ISB_C2 2 // interface colour using
3. define ISB_C4 4 // these 3 lowest bits - see below
4. define ISB_CLICK 8 // click this button to send IS_BTC
5. define ISB_LIGHT 16 // light button
6. define ISB_DARK 32 // dark button
7. define ISB_LEFT 64 // align text to left
8. define ISB_RIGHT 128 // align text to right

// colour 0 : light grey (not user editable) // colour 1 : title colour (default:yellow) // colour 2 : unselected text (default:black) // colour 3 : selected text (default:white) // colour 4 : ok (default:green) // colour 5 : cancel (default:red) // colour 6 : text string (default:pale blue) // colour 7 : unavailable (default:grey)

// NOTE : If width or height are zero, this would normally be an invalid button. But in that case if // there is an existing button with the same ClickID, all the packet contents are ignored except the // Text field. This can be useful for updating the text in a button without knowing its position. // For example, you might reply to an IS_BTT using an IS_BTN with zero W and H to update the text.

// Replies : If the user clicks on a clickable button, this packet will be sent :

struct IS_BTC // BuTton Click - sent back when user clicks a button { byte Size; // 8 byte Type; // ISP_BTC byte ReqI; // ReqI as received in the IS_BTN byte UCID; // connection that clicked the button (zero if local)

byte ClickID; // button identifier originally sent in IS_BTN byte Inst; // used internally by InSim byte CFlags; // button click flags - see below byte Sp3; };

// CFlags byte : click flags

1. define ISB_LMB 1 // left click
2. define ISB_RMB 2 // right click
3. define ISB_CTRL 4 // ctrl + click
4. define ISB_SHIFT 8 // shift + click

// If the TypeIn byte is set in IS_BTN the user can type text into the button // In that case no IS_BTC is sent - an IS_BTT is sent when the user presses ENTER

struct IS_BTT // BuTton Type - sent back when user types into a text entry button { byte Size; // 104 byte Type; // ISP_BTT byte ReqI; // ReqI as received in the IS_BTN byte UCID; // connection that typed into the button (zero if local)

byte ClickID; // button identifier originally sent in IS_BTN byte Inst; // used internally by InSim byte TypeIn; // from original button specification byte Sp3;

char Text[96]; // typed text, zero to TypeIn specified in IS_BTN };

// OutSim - MOTION SIMULATOR SUPPORT // ======

// The user's car in multiplayer or the viewed car in single player or // single player replay can output information to a motion system while // viewed from an internal view.

// This can be controlled by 5 lines in the cfg.txt file :

// OutSim Mode 0 :0-off 1-driving 2-driving+replay // OutSim Delay 1 :minimum delay between packets (100ths of a sec) // OutSim IP 0.0.0.0 :IP address to send the UDP packet // OutSim Port 0 :IP port // OutSim ID 0 :if not zero, adds an identifier to the packet

// Each update sends the following UDP packet :

struct OutSimPack { unsigned Time; // time in milliseconds (to check order)

Vector AngVel; // 3 floats, angular velocity vector float Heading; // anticlockwise from above (Z) float Pitch; // anticlockwise from right (X) float Roll; // anticlockwise from front (Y) Vector Accel; // 3 floats X, Y, Z Vector Vel; // 3 floats X, Y, Z Vec Pos; // 3 ints X, Y, Z (1m = 65536)

int ID; // optional - only if OutSim ID is specified };

// NOTE 1) X and Y axes are on the ground, Z is up.

// NOTE 2) Motion simulators can be dangerous. The Live for Speed developers do // not support any motion systems in particular and cannot accept responsibility // for injuries or deaths connected with the use of such machinery.

// OutGauge - EXTERNAL DASHBOARD SUPPORT // ========

// The user's car in multiplayer or the viewed car in single player or // single player replay can output information to a dashboard system // while viewed from an internal view.

// This can be controlled by 5 lines in the cfg.txt file :

// OutGauge Mode 0 :0-off 1-driving 2-driving+replay // OutGauge Delay 1 :minimum delay between packets (100ths of a sec) // OutGauge IP 0.0.0.0 :IP address to send the UDP packet // OutGauge Port 0 :IP port // OutGauge ID 0 :if not zero, adds an identifier to the packet

// Each update sends the following UDP packet :

struct OutGaugePack { unsigned Time; // time in milliseconds (to check order)

char Car[4]; // Car name word Flags; // Info (see OG_x below) byte Gear; // Reverse:0, Neutral:1, First:2... byte PLID; // Unique ID of viewed player (0 = none) float Speed; // M/S float RPM; // RPM float Turbo; // BAR float EngTemp; // C float Fuel; // 0 to 1 float OilPressure; // BAR float OilTemp; // C unsigned DashLights; // Dash lights available (see DL_x below) unsigned ShowLights; // Dash lights currently switched on float Throttle; // 0 to 1 float Brake; // 0 to 1 float Clutch; // 0 to 1 char Display1[16]; // Usually Fuel char Display2[16]; // Usually Settings

int ID; // optional - only if OutGauge ID is specified };

// OG_x - bits for OutGaugePack Flags

1. define OG_SHIFT 1 // key
2. define OG_CTRL 2 // key

1. define OG_TURBO 8192 // show turbo gauge
2. define OG_KM 16384 // if not set - user prefers MILES
3. define OG_BAR 32768 // if not set - user prefers PSI

// DL_x - bits for OutGaugePack DashLights and ShowLights

enum { DL_SHIFT, // bit 0 - shift light DL_FULLBEAM, // bit 1 - full beam DL_HANDBRAKE, // bit 2 - handbrake DL_PITSPEED, // bit 3 - pit speed limiter DL_TC, // bit 4 - TC active or switched off DL_SIGNAL_L, // bit 5 - left turn signal DL_SIGNAL_R, // bit 6 - right turn signal DL_SIGNAL_ANY, // bit 7 - shared turn signal DL_OILWARN, // bit 8 - oil pressure warning DL_BATTERY, // bit 9 - battery warning DL_ABS, // bit 10 - ABS active or switched off DL_SPARE, // bit 11 DL_NUM };

//////

1. endif