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ELO

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This commit is contained in:
gnieark 2016-06-09 22:44:58 +02:00
parent f3cd4bd9f0
commit 3f0bae6d07
1 changed files with 48 additions and 3 deletions
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51
src/functions.php
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@ -177,6 +177,34 @@ function get_battles_history($game){
}
return $results;
}
function ELO_get_k($elo){
if ($elo < 1000){
return 80;
}
if ($elo < 2000){
return 50;
}
if ($elo <= 2400){
return 30;
}
return 20;
}
function ELO_get_new_ranks($elo1,$elo2,$score){
/*
* return an array containing new ELO scores after a battle
* $score : 0 player 2 won
* 0.5 draws
* 1 player 1 won
*/
//good luck for understanding it
//(see https://blog.antoine-augusti.fr/2012/06/maths-et-code-le-classement-elo/)
return array(
$elo1 + ELO_get_k($elo1) * ($score - (1/ (1 + pow(10,(($elo2 - $elo1) / 400;))))),
$elo2 + ELO_get_k($elo2) * ($score - (1/ (1 + pow(10,(($elo1 - $elo2) / 400;)))))
);
}
function save_battle($game,$bot1,$bot2,$resultat){
//resultat: 0 match nul, 1 bot1 gagne 2 bot 2 gagne
@ -186,11 +214,12 @@ function save_battle($game,$bot1,$bot2,$resultat){
//chercher les id de bot 1 et bot2
$rs=mysqli_query($lnMysql,"SELECT name,id FROM bots
$rs=mysqli_query($lnMysql,"SELECT name,id,ELO FROM bots
WHERE name='".mysqli_real_escape_string($lnMysql,$bot1)."'
OR name='".mysqli_real_escape_string($lnMysql,$bot2)."'");
while($r=mysqli_fetch_row($rs)){
$bots[$r[0]]=$r[1];
$actualELO[$r[0]]=$r[2];
}
if((!isset($bots[$bot1])) OR (!isset($bots[$bot2]))){
@ -201,25 +230,41 @@ function save_battle($game,$bot1,$bot2,$resultat){
switch($resultat){
case 0:
$field="nulCount";
$eloScore = 0.5;
break;
case 1:
$field="player1_winsCount";
$eloScore = 1;
break;
case 2:
$field="player2_winsCount";
$eloScore = 0;
break;
default:
error (500,"something impossible has happened");
break;
}
mysqli_query($lnMysql,
"INSERT INTO arena_history(game,player1_id,player2_id,".$field.") VALUES
$newRanks = ELO_get_new_ranks($actualELO[$bot1],$actualELO[$bot2],$eloScore);
mysqli_multi_query($lnMysql,
"
UPDATE bots
SET ELO='".$newRanks[0]."'
WHERE id='".$bots[$bot1]."';
UPDATE bots
SET ELO='".$newRanks[1]."'
WHERE id='".$bots[$bot2]."';
INSERT INTO arena_history(game,player1_id,player2_id,".$field.") VALUES
('".mysqli_real_escape_string($lnMysql,$game)."',
'".$bots[$bot1]."',
'".$bots[$bot2]."',
'1')
ON DUPLICATE KEY UPDATE ".$field." = ".$field." + 1;");
}
function get_unique_id(){