race.qc

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#include "race.qh"
 
#include <common/deathtypes/all.qh>
#include <common/gametypes/_mod.qh>
#include <common/gametypes/rules.qh>
#include <common/mapobjects/subs.qh>
#include <common/mapobjects/triggers.qh>
#include <common/mutators/mutator/waypoints/waypointsprites.qh>
#include <common/net_linked.qh>
#include <common/notifications/all.qh>
#include <common/playerstats.qh>
#include <common/state.qh>
#include <common/stats.qh>
#include <common/vehicles/sv_vehicles.qh>
#include <common/weapons/_all.qh>
#include <common/weapons/weapon/porto.qh>
#include <lib/warpzone/common.qh>
#include <lib/warpzone/util_server.qh>
#include <server/bot/api.qh>
#include <server/cheats.qh>
#include <server/client.qh>
#include <server/command/getreplies.qh>
#include <server/damage.qh>
#include <server/gamelog.qh>
#include <server/intermission.qh>
#include <server/main.qh>
#include <server/mutators/_mod.qh>
#include <server/portals.qh>
#include <server/scores.qh>
#include <server/spawnpoints.qh>
#include <server/weapons/common.qh>
#include <server/world.qh>
 
.string stored_netname; // TODO: store this information independently of race-based gametypes
 
string uid2name(string myuid)
{
    string s = db_get(ServerProgsDB, strcat("/uid2name/", myuid));
 
    // FIXME remove this later after 0.6 release
    // convert old style broken records to correct style
    if(s == "")
    {
        s = db_get(ServerProgsDB, strcat("uid2name", myuid));
        if(s != "")
        {
            db_put(ServerProgsDB, strcat("/uid2name/", myuid), s);
            db_remove(ServerProgsDB, strcat("uid2name", myuid));
        }
    }
 
    if(s == "")
        s = "^1Unregistered Player";
    return s;
}
 
void write_recordmarker(entity pl, float tstart, float dt)
{
    GameLogEcho(strcat(":recordset:", ftos(pl.playerid), ":", ftos(dt)));
    // also write a marker into demo files for demotc-race-record-extractor to find
    stuffcmd(pl,
        sprintf("//%s RECORD SET %s %f %f\n", strconv(2, 0, 0, GetGametype()),
            TIME_ENCODED_TOSTRING(TIME_ENCODE(dt), false), tstart, dt));
}
 
IntrusiveList g_race_targets;
IntrusiveList g_racecheckpoints;
 
float race_readTime(string map, float pos)
{
    return stof(db_get(ServerProgsDB, strcat(map, record_type, "time", ftos(pos))));
}
 
string race_readUID(string map, float pos)
{
    return db_get(ServerProgsDB, strcat(map, record_type, "crypto_idfp", ftos(pos)));
}
 
float race_readPos(string map, float t)
{
    for(int i = 1; i <= RANKINGS_CNT; ++i)
    {
        int mytime = race_readTime(map, i);
        if(!mytime || mytime > t)
            return i;
    }
 
    return 0; // pos is zero if unranked
}
 
void race_writeTime(string map, float t, string myuid)
{
    float newpos;
    newpos = race_readPos(map, t);
 
    float i, prevpos = 0;
    for(i = 1; i <= RANKINGS_CNT; ++i)
    {
        if(race_readUID(map, i) == myuid)
            prevpos = i;
    }
    if (prevpos)
    {
        // player improved their existing record, only have to iterate on ranks between new and old recs
        for (i = prevpos; i > newpos; --i)
        {
            db_put(ServerProgsDB, strcat(map, record_type, "time", ftos(i)), ftos(race_readTime(map, i - 1)));
            db_put(ServerProgsDB, strcat(map, record_type, "crypto_idfp", ftos(i)), race_readUID(map, i - 1));
        }
    }
    else
    {
        // player has no ranked record yet
        for (i = RANKINGS_CNT; i > newpos; --i)
        {
            float other_time = race_readTime(map, i - 1);
            if (other_time) {
                db_put(ServerProgsDB, strcat(map, record_type, "time", ftos(i)), ftos(other_time));
                db_put(ServerProgsDB, strcat(map, record_type, "crypto_idfp", ftos(i)), race_readUID(map, i - 1));
            }
        }
    }
 
    // store new time itself
    db_put(ServerProgsDB, strcat(map, record_type, "time", ftos(newpos)), ftos(t));
    db_put(ServerProgsDB, strcat(map, record_type, "crypto_idfp", ftos(newpos)), myuid);
}
 
string race_readName(string map, float pos)
{
    return uid2name(db_get(ServerProgsDB, strcat(map, record_type, "crypto_idfp", ftos(pos))));
}
 
void race_checkAndWriteName(entity player)
{
    if(CS_CVAR(player).cvar_cl_allow_uidtracking == 1 && CS_CVAR(player).cvar_cl_allow_uid2name == 1)
    {
        if (!player.stored_netname)
            player.stored_netname = strzone(uid2name(player.crypto_idfp));
        if(player.stored_netname != player.netname)
        {
            db_put(ServerProgsDB, strcat("/uid2name/", player.crypto_idfp), player.netname);
            strcpy(player.stored_netname, player.netname);
        }
    }
}
 
 
const float MAX_CHECKPOINTS = 255;
 
.float race_penalty;
.float race_penalty_accumulator;
.string race_penalty_reason;
.float race_checkpoint; // player: next checkpoint that has to be reached
.entity race_lastpenalty;
 
.entity sprite;
 
float race_checkpoint_records[MAX_CHECKPOINTS];
float race_checkpoint_recordspeeds[MAX_CHECKPOINTS];
string race_checkpoint_recordholders[MAX_CHECKPOINTS];
float race_checkpoint_lasttimes[MAX_CHECKPOINTS];
float race_checkpoint_lastlaps[MAX_CHECKPOINTS];
entity race_checkpoint_lastplayers[MAX_CHECKPOINTS];
 
.float race_checkpoint_record[MAX_CHECKPOINTS];
.float race_checkpoint_recordspeed[MAX_CHECKPOINTS];
 
float race_highest_checkpoint;
float race_timed_checkpoint;
 
float defrag_ents;
float defragcpexists;
 
float race_NextCheckpoint(float f)
{
    if(f >= race_highest_checkpoint)
        return 0;
    else
        return f + 1;
}
 
float race_PreviousCheckpoint(float f)
{
    if(f == -1)
        return 0;
    else if(f == 0)
        return race_highest_checkpoint;
    else
        return f - 1;
}
 
// encode as:
//   0 = common start/finish
// 254 = start
// 255 = finish
float race_CheckpointNetworkID(float f)
{
    if(race_timed_checkpoint)
    {
        if(f == 0)
            return 254; // start
        else if(f == race_timed_checkpoint)
            return 255; // finish
    }
    return f;
}
 
void race_SendNextCheckpoint(entity e, float spec) // qualifying only
{
    if(!e.race_laptime)
        return;
 
    int cp = e.race_checkpoint;
    float recordtime;
    float recordspeed;
    float myrecordtime = e.race_checkpoint_record[cp];
    float myrecordspeed = e.race_checkpoint_recordspeed[cp];
    string recordholder;
    if (autocvar_g_race_cptimes_onlyself) {
        recordtime = myrecordtime;
        recordspeed = myrecordspeed;
        recordholder = "";
    } else {
        recordtime = race_checkpoint_records[cp];
        recordspeed = race_checkpoint_recordspeeds[cp];
        recordholder = race_checkpoint_recordholders[cp];
 
        if(recordholder == e.netname)
            recordholder = "";
    }
 
    if(!IS_REAL_CLIENT(e))
        return;
 
    if(!spec)
        msg_entity = e;
    WRITESPECTATABLE_MSG_ONE(msg_entity, {
        WriteHeader(MSG_ONE, TE_CSQC_RACE);
        if(spec)
        {
            WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_NEXT_SPEC_QUALIFYING);
            //WriteCoord(MSG_ONE, e.race_laptime - e.race_penalty_accumulator);
            WriteCoord(MSG_ONE, time - e.race_movetime - e.race_penalty_accumulator);
        }
        else
            WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_NEXT_QUALIFYING);
        WriteByte(MSG_ONE, race_CheckpointNetworkID(cp)); // checkpoint the player will be at next
        WriteInt24_t(MSG_ONE, recordtime);
        if(!spec)
            WriteInt24_t(MSG_ONE, myrecordtime);
        WriteString(MSG_ONE, recordholder);
        // All speeds networked as floats to have decimal precision
        WriteFloat(MSG_ONE, recordspeed);
        if(!spec)
            WriteFloat(MSG_ONE, myrecordspeed);
    });
}
 
void race_send_recordtime(float msg)
{
    // send the server best time
    WriteHeader(msg, TE_CSQC_RACE);
    WriteByte(msg, RACE_NET_SERVER_RECORD);
    WriteInt24_t(msg, race_readTime(GetMapname(), 1));
}
 
void race_send_speedaward(float msg)
{
    // send the best speed of the round
    WriteHeader(msg, TE_CSQC_RACE);
    WriteByte(msg, RACE_NET_SPEED_AWARD);
    WriteInt24_t(msg, floor(speedaward_speed+0.5));
    WriteString(msg, speedaward_holder);
}
 
void race_send_speedaward_alltimebest(float msg)
{
    // send the best speed
    WriteHeader(msg, TE_CSQC_RACE);
    WriteByte(msg, RACE_NET_SPEED_AWARD_BEST);
    WriteInt24_t(msg, floor(speedaward_alltimebest+0.5));
    WriteString(msg, speedaward_alltimebest_holder);
}
 
void race_send_rankings_cnt(float msg)
{
    WriteHeader(msg, TE_CSQC_RACE);
    WriteByte(msg, RACE_NET_RANKINGS_CNT);
    int m = min(RANKINGS_CNT, autocvar_g_cts_send_rankings_cnt);
    WriteByte(msg, m);
}
 
void race_SendRanking(float pos, float prevpos, float del, float msg)
{
    WriteHeader(msg, TE_CSQC_RACE);
    WriteByte(msg, RACE_NET_SERVER_RANKINGS);
    WriteShort(msg, pos);
    WriteShort(msg, prevpos);
    WriteShort(msg, del);
    WriteString(msg, race_readName(GetMapname(), pos));
    WriteInt24_t(msg, race_readTime(GetMapname(), pos));
}
 
void race_SpeedAwardFrame(entity player)
{
    if (IS_OBSERVER(player))
        return;
 
    if(vdist(player.velocity - player.velocity_z * '0 0 1', >, speedaward_speed))
    {
        speedaward_speed = vlen(player.velocity - player.velocity_z * '0 0 1');
        speedaward_holder = player.netname;
        speedaward_uid = player.crypto_idfp;
        speedaward_lastupdate = time;
    }
    if (speedaward_speed > speedaward_lastsent && (time - speedaward_lastupdate > 1 || intermission_running))
    {
        race_send_speedaward(MSG_ALL);
        speedaward_lastsent = speedaward_speed;
        if (speedaward_speed > speedaward_alltimebest && speedaward_uid != "")
        {
            speedaward_alltimebest = speedaward_speed;
            speedaward_alltimebest_holder = speedaward_holder;
            speedaward_alltimebest_uid = speedaward_uid;
            db_put(ServerProgsDB, strcat(GetMapname(), record_type, "speed/speed"), ftos(speedaward_alltimebest));
            db_put(ServerProgsDB, strcat(GetMapname(), record_type, "speed/crypto_idfp"), speedaward_alltimebest_uid);
            race_send_speedaward_alltimebest(MSG_ALL);
        }
    }
}
 
void race_SendAll(entity player, bool only_rankings)
{
    if(!IS_REAL_CLIENT(player))
        return;
 
    msg_entity = player;
    if (!only_rankings)
    {
        race_send_recordtime(MSG_ONE);
        race_send_speedaward(MSG_ONE);
 
        speedaward_alltimebest = stof(db_get(ServerProgsDB, strcat(GetMapname(), record_type, "speed/speed")));
        speedaward_alltimebest_holder = uid2name(db_get(ServerProgsDB, strcat(GetMapname(), record_type, "speed/crypto_idfp")));
        race_send_speedaward_alltimebest(MSG_ONE);
    }
 
    int m = min(RANKINGS_CNT, autocvar_g_cts_send_rankings_cnt);
    race_send_rankings_cnt(MSG_ONE);
    for (int i = 1; i <= m; ++i)
        race_SendRanking(i, 0, 0, MSG_ONE);
}
 
void race_SendStatus(float id, entity e)
{
    if(!IS_REAL_CLIENT(e))
        return;
 
    float msg;
    if (id == 0)
        msg = MSG_ONE;
    else
        msg = MSG_ALL;
    msg_entity = e;
    WRITESPECTATABLE_MSG_ONE(msg_entity, {
        WriteHeader(msg, TE_CSQC_RACE);
        WriteByte(msg, RACE_NET_SERVER_STATUS);
        WriteShort(msg, id);
        WriteString(msg, e.netname);
    });
}
 
void race_setTime(string map, float t, string myuid, string mynetname, entity e, bool showmessage)
{
    // netname only used TEMPORARILY for printing
    int newpos = race_readPos(map, t);
 
    int player_prevpos = 0;
    for(int i = 1; i <= RANKINGS_CNT; ++i)
    {
        if(race_readUID(map, i) == myuid)
            player_prevpos = i;
    }
 
    float oldrec;
    string oldrec_holder;
    if (player_prevpos && (player_prevpos < newpos || !newpos))
    {
        oldrec = race_readTime(GetMapname(), player_prevpos);
        race_SendStatus(0, e); // "fail"
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_FAIL_RANKED, mynetname, player_prevpos, t, oldrec);
        return;
    }
    else if (!newpos)
    {
        // no ranking, time worse than the worst ranked
        oldrec = race_readTime(GetMapname(), RANKINGS_CNT);
        race_SendStatus(0, e); // "fail"
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_FAIL_UNRANKED, mynetname, RANKINGS_CNT, t, oldrec);
        return;
    }
 
    // if we didn't hit a return yet, we have a new record!
 
    // if the player does not have a UID we can unfortunately not store the record, as the rankings system relies on UIDs
    if(myuid == "")
    {
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_NEW_MISSING_UID, mynetname, t);
        return;
    }
 
    if(CS_CVAR(e).cvar_cl_allow_uidtracking != 1 || CS_CVAR(e).cvar_cl_allow_uid2name != 1
       || uid2name(myuid) == "^1Unregistered Player")
    {
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_NEW_MISSING_NAME, mynetname, t);
        return;
    }
 
    oldrec = race_readTime(GetMapname(), newpos);
    oldrec_holder = race_readName(GetMapname(), newpos);
 
    // store new ranking
    race_writeTime(GetMapname(), t, myuid);
 
    if (newpos == 1 && showmessage)
    {
        write_recordmarker(e, time - TIME_DECODE(t), TIME_DECODE(t));
        race_send_recordtime(MSG_ALL);
    }
 
    race_SendRanking(newpos, player_prevpos, 0, MSG_ALL);
    strcpy(rankings_reply, getrankings());
 
    if(newpos == player_prevpos)
    {
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_NEW_IMPROVED, mynetname, newpos, t, oldrec);
        if(newpos == 1) { race_SendStatus(3, e); } // "new server record"
        else { race_SendStatus(1, e); } // "new time"
    }
    else if(oldrec == 0)
    {
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_NEW_SET, mynetname, newpos, t);
        if(newpos == 1) { race_SendStatus(3, e); } // "new server record"
        else { race_SendStatus(2, e); } // "new rank"
    }
    else
    {
        if(showmessage)
            Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_NEW_BROKEN, mynetname, oldrec_holder, newpos, t, oldrec);
        if(newpos == 1) { race_SendStatus(3, e); } // "new server record"
        else { race_SendStatus(2, e); } // "new rank"
    }
}
 
void race_deleteTime(string map, float pos)
{
    for(int i = pos; i <= RANKINGS_CNT; ++i)
    {
        string therank = ftos(i);
        if (i == RANKINGS_CNT)
        {
            db_remove(ServerProgsDB, strcat(map, record_type, "time", therank));
            db_remove(ServerProgsDB, strcat(map, record_type, "crypto_idfp", therank));
        }
        else
        {
            db_put(ServerProgsDB, strcat(map, record_type, "time", therank), ftos(race_readTime(GetMapname(), i+1)));
            db_put(ServerProgsDB, strcat(map, record_type, "crypto_idfp", therank), race_readUID(GetMapname(), i+1));
        }
    }
 
    race_SendRanking(pos, 0, 1, MSG_ALL);
    if(pos == 1)
        race_send_recordtime(MSG_ALL);
 
    strcpy(rankings_reply, getrankings());
}
 
void race_SendTime(entity e, float cp, float t, float tvalid)
{
    if(g_race_qualifying)
        t += e.race_penalty_accumulator;
 
    t = TIME_ENCODE(t); // make integer
 
    if(tvalid)
    if(cp == race_timed_checkpoint) // finish line
    if (!CS(e).race_completed)
    {
        int s = GameRules_scoring_add(e, RACE_FASTEST, 0);
        if(!s || t < s)
            GameRules_scoring_add(e, RACE_FASTEST, t - s);
        if(!g_race_qualifying)
        {
            s = GameRules_scoring_add(e, RACE_TIME, 0);
            int snew = TIME_ENCODE(time - game_starttime);
            GameRules_scoring_add(e, RACE_TIME, snew - s);
            int l = GameRules_scoring_add_team(e, RACE_LAPS, 1);
 
            if(autocvar_fraglimit)
                if(l >= autocvar_fraglimit)
                    race_StartCompleting();
 
            if(race_completing)
            {
                CS(e).race_completed = 1;
                MAKE_INDEPENDENT_PLAYER(e);
                if(e.bot_attack)
                    IL_REMOVE(g_bot_targets, e);
                e.bot_attack = false;
                Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_FINISHED, e.netname);
                ClientData_Touch(e, true);
            }
        }
    }
 
    if(g_race_qualifying)
    {
        float recordtime;
        float recordtimespeed;
        string recordholder;
 
        if(tvalid)
        {
            if (autocvar_g_race_cptimes_onlyself)
            {
                // return their own checkpoint time
                recordtime = e.race_checkpoint_record[cp];
                recordtimespeed = e.race_checkpoint_recordspeed[cp];
                recordholder = "";
            }
            else
            {
                recordtime = race_checkpoint_records[cp];
                recordtimespeed = race_checkpoint_recordspeeds[cp];
                // make a tempstring copy, as we'll possibly strunzone it
                recordholder = strcat(race_checkpoint_recordholders[cp]);
 
                if(recordholder == e.netname)
                    recordholder = "";
            }
 
            if(t != 0)
            {
                if(cp == race_timed_checkpoint)
                {
                    race_setTime(GetMapname(), t, e.crypto_idfp, e.netname, e, true);
                    MUTATOR_CALLHOOK(Race_FinalCheckpoint, e);
                }
 
                if(t < recordtime || recordtime == 0)
                {
                    race_checkpoint_records[cp] = t;
                    race_checkpoint_recordspeeds[cp] = vlen(vec2(e.velocity));
                    strcpy(race_checkpoint_recordholders[cp], e.netname);
                    if(g_race_qualifying)
                        FOREACH_CLIENT(IS_PLAYER(it) && IS_REAL_CLIENT(it) && it.race_checkpoint == cp, { race_SendNextCheckpoint(it, 0); });
                }
 
            }
        }
        else
        {
            // dummies
            t = 0;
            recordtime = 0;
            recordtimespeed = 0;
            recordholder = "";
        }
 
        if(IS_REAL_CLIENT(e))
        {
            if(g_race_qualifying)
            {
                FOREACH_CLIENT(IS_REAL_CLIENT(it),
                {
                    if(it == e || (IS_SPEC(it) && it.enemy == e))
                    {
                        msg_entity = it;
                        WriteHeader(MSG_ONE, TE_CSQC_RACE);
                        WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_HIT_QUALIFYING);
                        WriteByte(MSG_ONE, race_CheckpointNetworkID(cp)); // checkpoint the player now is at
                        WriteInt24_t(MSG_ONE, t); // time to that checkpoint
                        WriteInt24_t(MSG_ONE, recordtime); // previously best time
                        WriteInt24_t(MSG_ONE, ((tvalid) ? it.race_checkpoint_record[cp] : 0)); // previously best time
                        WriteString(MSG_ONE, recordholder); // record holder
                        // All speeds networked as floats to have decimal precision
                        WriteFloat(MSG_ONE, vlen(vec2(e.velocity))); // speed of cp hit
                        WriteFloat(MSG_ONE, recordtimespeed); // speed of previous best cp hit
                        WriteFloat(MSG_ONE, ((tvalid) ? it.race_checkpoint_recordspeed[cp] : 0)); // speed of my previous best cp hit
                    }
                });
            }
        }
        // check if new pb should be set for a checkpoint
        if(tvalid)
        {
            float myrecordtime = e.race_checkpoint_record[cp];
            if(t != 0)
                if(t < myrecordtime || myrecordtime == 0)
                {
                    e.race_checkpoint_record[cp] = t;
                    e.race_checkpoint_recordspeed[cp] = vlen(vec2(e.velocity));
                }
        }
    }
    else // RACE! Not Qualifying
    {
        float mylaps, lother, othtime;
        entity oth = race_checkpoint_lastplayers[cp];
        if(oth)
        {
            mylaps = GameRules_scoring_add(e, RACE_LAPS, 0);
            lother = race_checkpoint_lastlaps[cp];
            othtime = race_checkpoint_lasttimes[cp];
        }
        else
            mylaps = lother = othtime = 0;
 
        if(IS_REAL_CLIENT(e))
        {
            msg_entity = e;
            WRITESPECTATABLE_MSG_ONE(msg_entity, {
                WriteHeader(MSG_ONE, TE_CSQC_RACE);
                WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_HIT_RACE);
                WriteByte(MSG_ONE, race_CheckpointNetworkID(cp)); // checkpoint the player now is at
                if(e == oth)
                {
                    WriteInt24_t(MSG_ONE, 0);
                    WriteByte(MSG_ONE, 0);
                    WriteByte(MSG_ONE, 0);
                }
                else
                {
                    WriteInt24_t(MSG_ONE, TIME_ENCODE(time - race_checkpoint_lasttimes[cp]));
                    WriteByte(MSG_ONE, mylaps - lother);
                    WriteByte(MSG_ONE, etof(oth)); // record holder
                }
            });
        }
 
        race_checkpoint_lastplayers[cp] = e;
        race_checkpoint_lasttimes[cp] = time;
        race_checkpoint_lastlaps[cp] = mylaps;
 
        if(IS_REAL_CLIENT(oth))
        {
            msg_entity = oth;
            WRITESPECTATABLE_MSG_ONE(msg_entity, {
                WriteHeader(MSG_ONE, TE_CSQC_RACE);
                WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_HIT_RACE_BY_OPPONENT);
                WriteByte(MSG_ONE, race_CheckpointNetworkID(cp)); // checkpoint the player now is at
                if(e == oth)
                {
                    WriteInt24_t(MSG_ONE, 0);
                    WriteByte(MSG_ONE, 0);
                    WriteByte(MSG_ONE, 0);
                }
                else
                {
                    WriteInt24_t(MSG_ONE, TIME_ENCODE(time - othtime));
                    WriteByte(MSG_ONE, lother - mylaps);
                    WriteByte(MSG_ONE, etof(e) - 1); // record holder
                }
            });
        }
    }
}
 
void race_ClearTime(entity e)
{
    e.race_checkpoint = 0;
    e.race_laptime = 0;
    e.race_movetime = e.race_movetime_frac = e.race_movetime_count = 0;
    e.race_penalty_accumulator = 0;
    e.race_lastpenalty = NULL;
 
    if(!IS_REAL_CLIENT(e))
        return;
 
    msg_entity = e;
    WRITESPECTATABLE_MSG_ONE(msg_entity, {
        WriteHeader(MSG_ONE, TE_CSQC_RACE);
        WriteByte(MSG_ONE, RACE_NET_CHECKPOINT_CLEAR); // next
    });
}
 
void checkpoint_passed(entity this, entity player)
{
    if(IS_VEHICLE(player) && player.owner)
        player = player.owner;
 
    if(player.personal && autocvar_g_allow_checkpoints)
        return; // practice mode!
 
    if(player.classname == "porto")
    {
        // do not allow portalling through checkpoints
        trace_plane_normal = normalize(-1 * player.velocity);
        W_Porto_Fail(player, 0);
        return;
    }
 
    string oldmsg; // used twice
 
    /*
     * Trigger targets
     */
    if (!((this.spawnflags & 2) && (IS_PLAYER(player))))
    {
        oldmsg = this.message;
        this.message = "";
        SUB_UseTargets(this, player, player);
        this.message = oldmsg;
    }
 
    if (!IS_PLAYER(player))
        return;
 
    /*
     * Remove unauthorized equipment
     */
    Portal_ClearAll(player);
 
    player.porto_forbidden = 2; // decreased by 1 each StartFrame
 
    if(defrag_ents)
    {
        if(this.race_checkpoint == -2)
        {
            // duplicate targetname target_checkpoints get the same cp nr
            IL_EACH(g_race_targets, it.classname == "target_checkpoint" && it.targetname == this.targetname, {
                if(it.race_checkpoint >= 0)
                    this.race_checkpoint = it.race_checkpoint;
            });
            if(this.race_checkpoint == -2)
                this.race_checkpoint = player.race_checkpoint;
        }
 
        int cp_amount = 0, largest_cp_id = 0;
        IL_EACH(g_race_targets, it.classname == "target_checkpoint",
        {
            cp_amount += 1;
            if(it.race_checkpoint > largest_cp_id) // update the finish id if someone hit a new checkpoint
            {
                if(!largest_cp_id)
                {
                    IL_EACH(g_race_targets, it.classname == "target_checkpoint",
                    {
                        if(it.race_checkpoint == -2) // set defragcpexists to -1 so that the cp id file will be rewritten when someone finishes
                            defragcpexists = -1;
                    });
                }
 
                largest_cp_id = it.race_checkpoint;
                IL_EACH(g_race_targets, it.classname == "target_stopTimer",
                {
                    it.race_checkpoint = largest_cp_id + 1; // finish line
                });
                race_highest_checkpoint = largest_cp_id + 1;
                race_timed_checkpoint = largest_cp_id + 1;
            }
        });
 
        if(!cp_amount)
        {
            IL_EACH(g_race_targets, it.classname == "target_stopTimer",
            {
                it.race_checkpoint = 1;
            });
            race_highest_checkpoint = 1;
            race_timed_checkpoint = 1;
        }
    }
 
    if((player.race_checkpoint == -1 && this.race_checkpoint == 0) || (player.race_checkpoint == this.race_checkpoint))
    {
        if(this.race_penalty)
        {
            if(player.race_lastpenalty != this)
            {
                player.race_lastpenalty = this;
                race_ImposePenaltyTime(player, this.race_penalty, this.race_penalty_reason);
            }
        }
 
        if(player.race_penalty)
            return;
 
        /*
         * Trigger targets
         */
        if(this.spawnflags & 2)
        {
            oldmsg = this.message;
            this.message = "";
            SUB_UseTargets(this, player, player); // TODO: should we be using other for the trigger here?
            this.message = oldmsg;
        }
 
        if(player.race_respawn_checkpoint != this.race_checkpoint || !player.race_started)
            player.race_respawn_spotref = this; // this is not a spot but a CP, but spawnpoint selection will deal with that
        player.race_respawn_checkpoint = this.race_checkpoint;
        player.race_checkpoint = race_NextCheckpoint(this.race_checkpoint);
        player.race_started = 1;
 
        race_SendTime(player, this.race_checkpoint, player.race_movetime, boolean(player.race_laptime));
 
        if(!this.race_checkpoint) // start line
        {
            player.race_laptime = time;
            player.race_movetime = player.race_movetime_frac = player.race_movetime_count = 0;
            player.race_penalty_accumulator = 0;
            player.race_lastpenalty = NULL;
        }
 
        if(g_race_qualifying)
            race_SendNextCheckpoint(player, 0);
 
        if(defrag_ents && defragcpexists < 0 && this.classname == "target_stopTimer")
        {
            float fh;
            defragcpexists = fh = fopen(strcat("maps/", GetMapname(), ".defragcp"), FILE_WRITE);
            if(fh >= 0)
            {
                IL_EACH(g_race_targets, it.classname == "target_checkpoint",
                {
                    fputs(fh, strcat(it.targetname, " ", ftos(it.race_checkpoint), "\n"));
                });
            }
            fclose(fh);
        }
    }
    else if(player.race_checkpoint == race_NextCheckpoint(this.race_checkpoint))
    {
        // ignored
    }
    else
    {
        if(this.spawnflags & 4)
            Damage (player, this, this, 10000, DEATH_HURTTRIGGER.m_id, DMG_NOWEP, player.origin, '0 0 0');
    }
}
 
void checkpoint_touch(entity this, entity toucher)
{
    EXACTTRIGGER_TOUCH(this, toucher);
    checkpoint_passed(this, toucher);
}
 
void checkpoint_use(entity this, entity actor, entity trigger)
{
    if(trigger.classname == "info_player_deathmatch") // a spawn, a spawn
        return;
 
    checkpoint_passed(this, actor);
}
 
bool race_waypointsprite_visible_for_player(entity this, entity player, entity view)
{
    entity own = this.owner;
    if(this.realowner)
        own = this.realowner; // target support
 
    if(view.race_checkpoint == -1 || own.race_checkpoint == -2)
        return true;
    else if(view.race_checkpoint == own.race_checkpoint)
        return true;
    else
        return false;
}
 
void defrag_waypointsprites(entity targeted, entity checkpoint, int recursionlevel)
{
    // bones_was_here: spawn a waypoint for every entity with a bmodel
    // that directly or indirectly targets this checkpoint
    // (anything a player could touch or shoot to activate this cp)
 
    // spam a few warnings so that larger link chain loops can be found
    if (recursionlevel > 400)
    {
        LOG_WARNF("df cp wp loop: ^4\"target\" ^3\"%s\"^7, ^4\"targetname\" ^3\"%s\"^7",
            targeted.classname,
            targeted.targetname);
    }
    // avoid a stack overflow
    if (recursionlevel > 420)
    {
        LOG_WARNF("Aborted creating defrag checkpoint waypointsprites for ^2%s^7 due to a loop",
            checkpoint.classname);
        return;
    }
 
    entity s = WP_RaceCheckpoint;
    if (checkpoint.classname == "target_startTimer")
        s = WP_RaceStart;
    else if (checkpoint.classname == "target_stopTimer")
        s = WP_RaceFinish;
 
    for (entity t = findchain(target, targeted.targetname); t; t = t.chain)
    {
        if (t.modelindex)
        {
            WaypointSprite_SpawnFixed(s, (t.absmin + t.absmax) * 0.5, t, sprite, RADARICON_NONE);
            t.sprite.realowner = checkpoint;
            t.sprite.waypointsprite_visible_for_player = race_waypointsprite_visible_for_player;
        }
 
        if (t.targetname && t != checkpoint)
            defrag_waypointsprites(t, checkpoint, ++recursionlevel);
    }
}
 
void trigger_race_checkpoint_verify(entity this)
{
    static bool have_verified;
    if (have_verified) return;
    have_verified = true;
 
    int qual = g_race_qualifying;
 
    int pl_race_checkpoint = 0;
    int pl_race_place = 0;
 
    if (g_race) {
        for (int i = 0; i <= race_highest_checkpoint; ++i) {
            pl_race_checkpoint = race_NextCheckpoint(i);
 
            // race only (middle of the race)
            g_race_qualifying = 0;
            pl_race_place = 0;
            if (!Spawn_FilterOutBadSpots(this, findchain(classname, "info_player_deathmatch"), 0, false, true)) {
                error(strcat("Checkpoint ", ftos(i), " misses a spawnpoint with race_place==", ftos(pl_race_place), " (used for respawning in race) - bailing out"));
            }
 
            if (i == 0) {
                // qualifying only
                g_race_qualifying = 1;
                pl_race_place = race_lowest_place_spawn;
                if (!Spawn_FilterOutBadSpots(this, findchain(classname, "info_player_deathmatch"), 0, false, true)) {
                    error(strcat("Checkpoint ", ftos(i), " misses a spawnpoint with race_place==", ftos(pl_race_place), " (used for qualifying) - bailing out"));
                }
 
                // race only (initial spawn)
                g_race_qualifying = 0;
                for (int p = 1; p <= race_highest_place_spawn; ++p) {
                    pl_race_place = p;
                    if (!Spawn_FilterOutBadSpots(this, findchain(classname, "info_player_deathmatch"), 0, false, true)) {
                        error(strcat("Checkpoint ", ftos(i), " misses a spawnpoint with race_place==", ftos(pl_race_place), " (used for initially spawning in race) - bailing out"));
                    }
                }
            }
        }
    } else if (!defrag_ents) {
        // qualifying only
        pl_race_checkpoint = race_NextCheckpoint(0);
        g_race_qualifying = 1;
        pl_race_place = race_lowest_place_spawn;
        if (!Spawn_FilterOutBadSpots(this, findchain(classname, "info_player_deathmatch"), 0, false, true)) {
            error(strcat("Checkpoint 0 misses a spawnpoint with race_place==", ftos(pl_race_place), " (used for qualifying) - bailing out"));
        }
    } else {
        pl_race_checkpoint = race_NextCheckpoint(0);
        g_race_qualifying = 1;
        pl_race_place = 0; // there's only one spawn on defrag maps
 
        // check if a defragcp file already exists, then read it and apply the checkpoint order
        float fh;
        float len;
        bool broken_defragcp = false;
        string l;
 
        defragcpexists = fh = fopen(strcat("maps/", GetMapname(), ".defragcp"), FILE_READ);
        if (fh >= 0) {
            while ((l = fgets(fh))) {
                len = tokenize_console(l);
                if (len != 2) {
                    broken_defragcp = true;
                    break;
                }
                for (entity cp = NULL; (cp = find(cp, classname, "target_checkpoint"));) {
                    if (argv(0) == cp.targetname) {
                        if(cp.race_checkpoint != -2 && cp.race_checkpoint != stof(argv(1))) {
                            broken_defragcp = true; // cp had been previously set with diff order nr defragcp file is broken
                            break;
                        }
                        cp.race_checkpoint = stof(argv(1));
                    }
                }
                if(broken_defragcp) break; // no point to keep going we'll rebuild the whole order
            }
            fclose(fh);
            if(broken_defragcp) {
                // something's wrong in the defrag cp file, set defragcpexists to -1 so that it will be rewritten when someone finishes
                // also clear any set cp order to make sure map is completable
                defragcpexists = -1;
                for (entity cp = NULL; (cp = find(cp, classname, "target_checkpoint"));) {
                    cp.race_checkpoint = -2;
                }
            }
        }
    }
 
    g_race_qualifying = qual;
 
    if (race_timed_checkpoint) {
        if (defrag_ents) {
            IL_EACH(g_race_targets, it.classname == "target_checkpoint" || it.classname == "target_startTimer" || it.classname == "target_stopTimer",
            {
                defrag_waypointsprites(it, it, 0);
 
                if(it.classname == "target_checkpoint") {
                    if(it.race_checkpoint == -2)
                        defragcpexists = -1; // something's wrong with the defrag cp file or it has not been written yet, set defragcpexists to -1 so that it will be rewritten when someone finishes
                }
            });
            if (defragcpexists != -1) {
                float largest_cp_id = 0;
                for (entity cp = NULL; (cp = find(cp, classname, "target_checkpoint"));) {
                    if (cp.race_checkpoint > largest_cp_id) {
                        largest_cp_id = cp.race_checkpoint;
                    }
                }
                for (entity cp = NULL; (cp = find(cp, classname, "target_stopTimer"));) {
                    cp.race_checkpoint = largest_cp_id + 1; // finish line
                }
                race_highest_checkpoint = largest_cp_id + 1;
                race_timed_checkpoint = largest_cp_id + 1;
            } else {
                for (entity cp = NULL; (cp = find(cp, classname, "target_stopTimer"));) {
                    cp.race_checkpoint = 255; // finish line
                }
                race_highest_checkpoint = 255;
                race_timed_checkpoint = 255;
            }
        } else {
            IL_EACH(g_racecheckpoints, it.sprite,
            {
                if (it.race_checkpoint == 0) {
                    WaypointSprite_UpdateSprites(it.sprite, WP_RaceStart, WP_Null, WP_Null);
                } else if (it.race_checkpoint == race_timed_checkpoint) {
                    WaypointSprite_UpdateSprites(it.sprite, WP_RaceFinish, WP_Null, WP_Null);
                }
            });
        }
    }
 
    if (defrag_ents) { /* The following hack shall be removed when per-player trigger_multiple.wait is implemented for cts */
        for (entity trigger = NULL; (trigger = find(trigger, classname, "trigger_multiple")); ) {
            for (entity targ = NULL; (targ = find(targ, targetname, trigger.target)); ) {
                if (targ.classname == "target_checkpoint" || targ.classname == "target_startTimer" || targ.classname == "target_stopTimer") {
                    trigger.wait = 0;
                    trigger.delay = 0;
                    targ.wait = 0;
                    targ.delay = 0;
 
                    // These just make the game crash on some maps with oddly shaped triggers.
                    // (on the other hand they used to fix the case when two players ran through a checkpoint at once,
                    // and often one of them just passed through without being registered. Hope it's fixed  in a better way now.
                    // (happened on item triggers too)
                    //
                    //targ.wait = -2;
                    //targ.delay = 0;
 
                    //setsize(targ, trigger.mins, trigger.maxs);
                    //setorigin(targ, trigger.origin);
                    //remove(trigger);
                }
            }
        }
    }
}
 
vector trigger_race_checkpoint_spawn_evalfunc(entity this, entity player, entity spot, vector current)
{
    if(g_race_qualifying)
    {
        // spawn at first
        if(this.race_checkpoint != 0)
            return '-1 0 0';
        if(spot.race_place != race_lowest_place_spawn)
            return '-1 0 0';
    }
    else
    {
        if(this.race_checkpoint != player.race_respawn_checkpoint)
            return '-1 0 0';
        // try reusing the previous spawn
        if(this == player.race_respawn_spotref || spot == player.race_respawn_spotref)
            current.x += SPAWN_PRIO_RACE_PREVIOUS_SPAWN;
        if(this.race_checkpoint == 0)
        {
            int pl = player.race_place;
            if(pl > race_highest_place_spawn)
                pl = 0;
            if(pl == 0 && !player.race_started)
                pl = race_highest_place_spawn; // use last place if they have not even touched finish yet
            if(spot.race_place != pl)
                return '-1 0 0';
        }
    }
    return current;
}
 
spawnfunc(trigger_race_checkpoint)
{
    vector o;
    if(!g_race && !g_cts) { delete(this); return; }
 
    EXACTTRIGGER_INIT;
 
    this.use = checkpoint_use;
    if (!(this.spawnflags & 1))
        settouch(this, checkpoint_touch);
 
    o = (this.absmin + this.absmax) * 0.5;
    tracebox(o, PL_MIN_CONST, PL_MAX_CONST, o - '0 0 1' * (o.z - this.absmin.z), MOVE_NORMAL, this);
    waypoint_spawnforitem_force(this, trace_endpos);
    this.nearestwaypointtimeout = -1;
 
    if(this.message == "")
        this.message = "went backwards";
    if (this.message2 == "")
        this.message2 = "was pushed backwards by";
    if (this.race_penalty_reason == "")
        this.race_penalty_reason = "missing a checkpoint";
 
    this.race_checkpoint = this.cnt;
 
    if(this.race_checkpoint > race_highest_checkpoint)
    {
        race_highest_checkpoint = this.race_checkpoint;
        if(this.spawnflags & 8)
            race_timed_checkpoint = this.race_checkpoint;
        else
            race_timed_checkpoint = 0;
    }
 
    if(!this.race_penalty)
    {
        if(this.race_checkpoint)
            WaypointSprite_SpawnFixed(WP_RaceCheckpoint, o, this, sprite, RADARICON_NONE);
        else
            WaypointSprite_SpawnFixed(WP_RaceStartFinish, o, this, sprite, RADARICON_NONE);
    }
 
    this.sprite.waypointsprite_visible_for_player = race_waypointsprite_visible_for_player;
    this.spawn_evalfunc = trigger_race_checkpoint_spawn_evalfunc;
 
    if (!g_racecheckpoints)
        g_racecheckpoints = IL_NEW();
    IL_PUSH(g_racecheckpoints, this);
 
    // trigger_race_checkpoint_verify checks this list too
    if (!g_race_targets)
        g_race_targets = IL_NEW();
 
    InitializeEntity(this, trigger_race_checkpoint_verify, INITPRIO_FINDTARGET);
}
 
void target_checkpoint_setup(entity this)
{
    if(!g_race && !g_cts) { delete(this); return; }
    defrag_ents = 1;
 
    // if this is targeted, then it probably isn't a trigger
    bool is_trigger = this.targetname == "";
 
    if(is_trigger)
        EXACTTRIGGER_INIT;
 
    this.use = checkpoint_use;
    if (is_trigger && !(this.spawnflags & 1))
        settouch(this, checkpoint_touch);
 
    vector org = this.origin;
 
    // bots should only pathfind to this if it is a valid touchable trigger
    if(is_trigger)
    {
        org = (this.absmin + this.absmax) * 0.5;
        tracebox(org, PL_MIN_CONST, PL_MAX_CONST, org - '0 0 1' * (org.z - this.absmin.z), MOVE_NORMAL, this);
        waypoint_spawnforitem_force(this, trace_endpos);
        this.nearestwaypointtimeout = -1;
    }
 
    if(this.message == "")
        this.message = "went backwards";
    if (this.message2 == "")
        this.message2 = "was pushed backwards by";
    if (this.race_penalty_reason == "")
        this.race_penalty_reason = "missing a checkpoint";
 
    if(this.classname == "target_startTimer")
        this.race_checkpoint = 0;
    else
        this.race_checkpoint = -2;
 
    race_timed_checkpoint = 1;
 
    if (!g_race_targets)
        g_race_targets = IL_NEW();
    IL_PUSH(g_race_targets, this);
 
    // trigger_race_checkpoint_verify checks this list too
    if (!g_racecheckpoints)
        g_racecheckpoints = IL_NEW();
 
    InitializeEntity(this, trigger_race_checkpoint_verify, INITPRIO_FINDTARGET);
}
 
spawnfunc(target_checkpoint)
{
    // xonotic defrag entity
    target_checkpoint_setup(this);
}
 
// compatibility entity names
spawnfunc(target_startTimer) { target_checkpoint_setup(this); }
spawnfunc(target_stopTimer) { target_checkpoint_setup(this); }
 
void race_AbandonRaceCheck(entity p)
{
    if(race_completing && !CS(p).race_completed)
    {
        CS(p).race_completed = 1;
        MAKE_INDEPENDENT_PLAYER(p);
        Send_Notification(NOTIF_ALL, NULL, MSG_INFO, INFO_RACE_ABANDONED, p.netname);
        ClientData_Touch(p, true);
    }
}
 
void race_StartCompleting()
{
    race_completing = 1;
    FOREACH_CLIENT(IS_PLAYER(it) && IS_DEAD(it), { race_AbandonRaceCheck(it); });
}
 
void race_PreparePlayer(entity this)
{
    race_ClearTime(this);
    this.race_place = 0;
    this.race_started = 0;
    this.race_respawn_checkpoint = 0;
    this.race_respawn_spotref = NULL;
}
 
void race_RetractPlayer(entity this)
{
    if(!g_race && !g_cts)
        return;
    if(this.race_respawn_checkpoint == 0 || this.race_respawn_checkpoint == race_timed_checkpoint)
        race_ClearTime(this);
    this.race_checkpoint = this.race_respawn_checkpoint;
}
 
spawnfunc(info_player_race)
{
    if(!g_race && !g_cts) { delete(this); return; }
    ++race_spawns;
    spawnfunc_info_player_deathmatch(this);
 
    if(this.race_place > race_highest_place_spawn)
        race_highest_place_spawn = this.race_place;
    if(this.race_place < race_lowest_place_spawn)
        race_lowest_place_spawn = this.race_place;
}
 
void race_ClearPlayerRecords(entity player)
{
    for(int i = 0; i < MAX_CHECKPOINTS; ++i)
    {
        player.race_checkpoint_record[i] = 0;
        player.race_checkpoint_recordspeed[i] = 0;
    }
}
 
void race_ClearRecords()
{
    for(int j = 0; j < MAX_CHECKPOINTS; ++j)
    {
        race_checkpoint_records[j] = 0;
        race_checkpoint_recordspeeds[j] = 0;
        strfree(race_checkpoint_recordholders[j]);
    }
 
    FOREACH_CLIENT(true, {
        float p = it.race_place;
        race_PreparePlayer(it);
        it.race_place = p;
    });
}
 
void race_ImposePenaltyTime(entity pl, float penalty, string reason)
{
    if(g_race_qualifying)
    {
        pl.race_penalty_accumulator += penalty;
        if(IS_REAL_CLIENT(pl))
        {
            msg_entity = pl;
            WRITESPECTATABLE_MSG_ONE(msg_entity, {
                WriteHeader(MSG_ONE, TE_CSQC_RACE);
                WriteByte(MSG_ONE, RACE_NET_PENALTY_QUALIFYING);
                WriteShort(MSG_ONE, TIME_ENCODE(penalty));
                WriteString(MSG_ONE, reason);
            });
        }
    }
    else
    {
        pl.race_penalty = time + penalty;
        if(IS_REAL_CLIENT(pl))
        {
            msg_entity = pl;
            WRITESPECTATABLE_MSG_ONE(msg_entity, {
                WriteHeader(MSG_ONE, TE_CSQC_RACE);
                WriteByte(MSG_ONE, RACE_NET_PENALTY_RACE);
                WriteShort(MSG_ONE, TIME_ENCODE(penalty));
                WriteString(MSG_ONE, reason);
            });
        }
    }
}
 
void penalty_touch(entity this, entity toucher)
{
    EXACTTRIGGER_TOUCH(this, toucher);
    if(toucher.race_lastpenalty != this)
    {
        toucher.race_lastpenalty = this;
        race_ImposePenaltyTime(toucher, this.race_penalty, this.race_penalty_reason);
    }
}
 
void penalty_use(entity this, entity actor, entity trigger)
{
    race_ImposePenaltyTime(actor, this.race_penalty, this.race_penalty_reason);
}
 
spawnfunc(trigger_race_penalty)
{
    // TODO: find out why this wasnt done:
    //if(!g_cts && !g_race) { remove(this); return; }
 
    EXACTTRIGGER_INIT;
 
    this.use = penalty_use;
    if (!(this.spawnflags & 1))
        settouch(this, penalty_touch);
 
    if (this.race_penalty_reason == "")
        this.race_penalty_reason = "missing a checkpoint";
    if (!this.race_penalty)
        this.race_penalty = 5;
}
 
float race_GetFractionalLapCount(entity e)
{
    // interesting metrics (idea by KrimZon) to maybe sort players in the
    // scoreboard, immediately updates when overtaking
    //
    // requires the track to be built so you never get farther away from the
    // next checkpoint, though, and current Xonotic race maps are not built that
    // way
    //
    // also, this code is slow and would need optimization (i.e. "next CP"
    // links on CP entities)
 
    float l;
    l = GameRules_scoring_add(e, RACE_LAPS, 0);
    if(CS(e).race_completed)
        return l; // not fractional
 
    vector o0, o1;
    float bestfraction, fraction;
    entity lastcp;
    float nextcpindex, lastcpindex;
 
    nextcpindex = max(e.race_checkpoint, 0);
    lastcpindex = e.race_respawn_checkpoint;
    lastcp = e.race_respawn_spotref;
 
    if(nextcpindex == lastcpindex)
        return l; // finish
 
    bestfraction = 1;
    IL_EACH(g_racecheckpoints, true,
    {
        if(it.race_checkpoint != lastcpindex)
            continue;
        if(lastcp)
            if(it != lastcp)
                continue;
        o0 = (it.absmin + it.absmax) * 0.5;
        IL_EACH(g_racecheckpoints, true,
        {
            if(it.race_checkpoint != nextcpindex)
                continue;
            o1 = (it.absmin + it.absmax) * 0.5;
            if(o0 == o1)
                continue;
            fraction = bound(0.0001, vlen(e.origin - o1) / vlen(o0 - o1), 1);
            if(fraction < bestfraction)
                bestfraction = fraction;
        });
    });
 
    // we are at CP "nextcpindex - bestfraction"
    // race_timed_checkpoint == 4: then nextcp==4 means 0.9999x, nextcp==0 means 0.0000x
    // race_timed_checkpoint == 0: then nextcp==0 means 0.9999x
    float c, nc;
    nc = race_highest_checkpoint + 1;
    c = ((nextcpindex - race_timed_checkpoint + nc + nc - 1) % nc) + 1 - bestfraction;
 
    return l + c / nc;
}