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This commit is contained in:
Alex Wulf
2022-07-05 15:55:47 +02:00
parent bfc558d1f2
commit 7d4547df6a
68 changed files with 670 additions and 402 deletions
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42
src/TrueSkill/TwoPlayerTrueSkillCalculator.php
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@ -1,15 +1,17 @@
<?php namespace DNW\Skills\TrueSkill;
<?php
namespace DNW\Skills\TrueSkill;
use DNW\Skills\GameInfo;
use DNW\Skills\Guard;
use DNW\Skills\Numerics\BasicMath;
use DNW\Skills\PairwiseComparison;
use DNW\Skills\PlayersRange;
use DNW\Skills\RankSorter;
use DNW\Skills\Rating;
use DNW\Skills\RatingContainer;
use DNW\Skills\SkillCalculator;
use DNW\Skills\SkillCalculatorSupportedOptions;
use DNW\Skills\PlayersRange;
use DNW\Skills\TeamsRange;
/**
@ -30,7 +32,7 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
array $teamRanks)
{
// Basic argument checking
Guard::argumentNotNull($gameInfo, "gameInfo");
Guard::argumentNotNull($gameInfo, 'gameInfo');
$this->validateTeamCountAndPlayersCountPerTeam($teams);
// Make sure things are in order
@ -83,8 +85,7 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
$winningMean = $selfRating->getMean();
$losingMean = $opponentRating->getMean();
switch ($comparison)
{
switch ($comparison) {
case PairwiseComparison::WIN:
case PairwiseComparison::DRAW:
// NOP
@ -97,37 +98,34 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
$meanDelta = $winningMean - $losingMean;
if ($comparison != PairwiseComparison::DRAW)
{
if ($comparison != PairwiseComparison::DRAW) {
// non-draw case
$v = TruncatedGaussianCorrectionFunctions::vExceedsMarginScaled($meanDelta, $drawMargin, $c);
$w = TruncatedGaussianCorrectionFunctions::wExceedsMarginScaled($meanDelta, $drawMargin, $c);
$rankMultiplier = (int) $comparison;
}
else
{
} else {
$v = TruncatedGaussianCorrectionFunctions::vWithinMarginScaled($meanDelta, $drawMargin, $c);
$w = TruncatedGaussianCorrectionFunctions::wWithinMarginScaled($meanDelta, $drawMargin, $c);
$rankMultiplier = 1;
}
$meanMultiplier = (BasicMath::square($selfRating->getStandardDeviation()) + BasicMath::square($gameInfo->getDynamicsFactor()))/$c;
$meanMultiplier = (BasicMath::square($selfRating->getStandardDeviation()) + BasicMath::square($gameInfo->getDynamicsFactor())) / $c;
$varianceWithDynamics = BasicMath::square($selfRating->getStandardDeviation()) + BasicMath::square($gameInfo->getDynamicsFactor());
$stdDevMultiplier = $varianceWithDynamics/BasicMath::square($c);
$stdDevMultiplier = $varianceWithDynamics / BasicMath::square($c);
$newMean = $selfRating->getMean() + ($rankMultiplier*$meanMultiplier*$v);
$newStdDev = sqrt($varianceWithDynamics*(1 - $w*$stdDevMultiplier));
$newMean = $selfRating->getMean() + ($rankMultiplier * $meanMultiplier * $v);
$newStdDev = sqrt($varianceWithDynamics * (1 - $w * $stdDevMultiplier));
return new Rating($newMean, $newStdDev);
}
/**
* {@inheritdoc }
* {@inheritdoc}
*/
public function calculateMatchQuality(GameInfo $gameInfo, array $teams)
{
Guard::argumentNotNull($gameInfo, "gameInfo");
Guard::argumentNotNull($gameInfo, 'gameInfo');
$this->validateTeamCountAndPlayersCountPerTeam($teams);
$team1 = $teams[0];
@ -146,18 +144,18 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
// This is the square root part of the equation:
$sqrtPart = sqrt(
(2*$betaSquared)
(2 * $betaSquared)
/
(2*$betaSquared + $player1SigmaSquared + $player2SigmaSquared)
(2 * $betaSquared + $player1SigmaSquared + $player2SigmaSquared)
);
// This is the exponent part of the equation:
$expPart = exp(
(-1*BasicMath::square($player1Rating->getMean() - $player2Rating->getMean()))
(-1 * BasicMath::square($player1Rating->getMean() - $player2Rating->getMean()))
/
(2*(2*$betaSquared + $player1SigmaSquared + $player2SigmaSquared))
(2 * (2 * $betaSquared + $player1SigmaSquared + $player2SigmaSquared))
);
return $sqrtPart*$expPart;
return $sqrtPart * $expPart;
}
}
}