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71 lines
1.7 KiB
PHP
71 lines
1.7 KiB
PHP
<?php
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class DUEL{
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public $rank1;
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public $rank2;
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private $factor = 400;
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public function __construct($r1,$r2){
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$this->rank1 = $r1;
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$this->rank2 = $r2;
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}
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private function get_k($rank){
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if ($rank < 1000) return 80;
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if ($rank < 2000) return 50;
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if ($rank <= 2400) return 30;
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return 20;
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}
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private function changeScores($score){
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$this->rank1 = $this->rank1 + $this->get_k($this->rank1) * ($score - (1/ (1 + pow(10,(($this->rank2 - $this->rank1) / $this->factor)))));
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$this->rank2 = $this->rank2 + $this->get_k($this->rank2) * (1 - $score - (1/ (1 + pow(10,(($this->rank1 - $this->rank2) / $this->factor)))));
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}
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public function oneWinsAgainstTwo(){
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$this->changeScores(1);
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}
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public function twoWinsAgainstOne(){
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$this->changeScores(0);
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}
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public function drawGame(){
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$this->changeScores(0.5);
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}
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}
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class ELO
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{
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public $rank = 1500; //default rank
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public function __construct($v=1500) {
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$this->rank = $v;
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}
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private function ELO_get_new_ranks($elo1,$elo2,$score){
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/*
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* return an array containing new ELO scores after a battle
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* $score : 0 player 2 won
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* 0.5 draws
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* 1 player 1 won
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*/
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//good luck for understanding it
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//(see https://blog.antoine-augusti.fr/2012/06/maths-et-code-le-classement-elo/)
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return array(
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$elo1 + ELO_get_k($elo1) * ($score - (1/ (1 + pow(10,(($elo2 - $elo1) / 400))))),
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$elo2 + ELO_get_k($elo2) * (1 - $score - (1/ (1 + pow(10,(($elo1 - $elo2) / 400)))))
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);
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}
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public function looseAgainst(ELO $winer){
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}
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public function winAgainst(ELO $looser){
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}
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public function drawAgainst(ELO $drawPlayer){
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}
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}
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