mirror of
https://github.com/furyfire/trueskill.git
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39 lines
1.2 KiB
PHP
39 lines
1.2 KiB
PHP
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<?php
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namespace Moserware\Skills\TrueSkill\Layers;
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class TeamDifferencesComparisonLayer extends TrueSkillFactorGraphLayer
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{
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private $_epsilon;
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private $_teamRanks;
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public function __construct(TrueSkillFactorGraph $parentGraph, array $teamRanks)
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{
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parent::__construct($parentGraph);
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$this->_teamRanks = $teamRanks;
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$gameInfo = $this->getParentFactorGraph()->getGameInfo();
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$this->_epsilon = DrawMargin::getDrawMarginFromDrawProbability($gameInfo->getDrawProbability(), $gameInfo->getBeta());
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}
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public function buildLayer()
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{
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$inputVarGroups = $this->getInputVariablesGroups();
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$inputVarGroupsCount = count($inputVarGroups);
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for ($i = 0; $i < $inputVarGroupsCount; $i++)
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{
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$isDraw = ($this->_teamRanks[$i] == $this->_teamRanks[$i + 1]);
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$teamDifference = $inputVarGroups[$i][0];
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$factor =
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$isDraw
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? new GaussianWithinFactor($this->_epsilon, $teamDifference)
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: new GaussianGreaterThanFactor($this->_epsilon, $teamDifference);
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$this->addLayerFactor($factor);
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}
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}
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}
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?>
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