jct/trueskill
1
0
Fork 0
mirror of https://github.com/furyfire/trueskill.git synced 2025-04-19 04:14:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

Cleanup in src/, adding namespaces, removing php closing tag and general code cleanup

Browse Source
This commit is contained in:
Alexander Liljengård
2016-05-24 14:10:39 +02:00
parent 9f97eb1653
commit 5694a2fb30
64 changed files with 891 additions and 1328 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
src/TrueSkill/TwoPlayerTrueSkillCalculator.php
View File

@ -1,25 +1,8 @@
<?php
namespace Moserware\Skills\TrueSkill;
require_once(dirname(__FILE__) . "/../GameInfo.php");
require_once(dirname(__FILE__) . "/../Guard.php");
require_once(dirname(__FILE__) . "/../PairwiseComparison.php");
require_once(dirname(__FILE__) . "/../RankSorter.php");
require_once(dirname(__FILE__) . "/../Rating.php");
require_once(dirname(__FILE__) . "/../RatingContainer.php");
require_once(dirname(__FILE__) . "/../SkillCalculator.php");
require_once(dirname(__FILE__) . "/../PlayersRange.php");
require_once(dirname(__FILE__) . "/../TeamsRange.php");
require_once(dirname(__FILE__) . "/../Numerics/BasicMath.php");
require_once(dirname(__FILE__) . "/DrawMargin.php");
require_once(dirname(__FILE__) . "/TruncatedGaussianCorrectionFunctions.php");
<?php namespace Moserware\Skills\TrueSkill;
use Moserware\Skills\GameInfo;
use Moserware\Skills\Guard;
use Moserware\Skills\Numerics\BasicMatch;
use Moserware\Skills\PairwiseComparison;
use Moserware\Skills\RankSorter;
use Moserware\Skills\Rating;
@ -36,7 +19,6 @@ use Moserware\Skills\TeamsRange;
* When you only have two players, a lot of the math simplifies. The main purpose of this class
* is to show the bare minimum of what a TrueSkill implementation should have.
*/
class TwoPlayerTrueSkillCalculator extends SkillCalculator
{
public function __construct()
@ -86,16 +68,18 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
private static function calculateNewRating(GameInfo $gameInfo, Rating $selfRating, Rating $opponentRating, $comparison)
{
$drawMargin = DrawMargin::getDrawMarginFromDrawProbability($gameInfo->getDrawProbability(),
$gameInfo->getBeta());
$drawMargin = DrawMargin::getDrawMarginFromDrawProbability(
$gameInfo->getDrawProbability(),
$gameInfo->getBeta()
);
$c =
sqrt(
square($selfRating->getStandardDeviation())
+
square($opponentRating->getStandardDeviation())
+
2*square($gameInfo->getBeta()));
$c = sqrt(
BasicMatch::square($selfRating->getStandardDeviation())
+
BasicMatch::square($opponentRating->getStandardDeviation())
+
2 * BasicMatch::square($gameInfo->getBeta())
);
$winningMean = $selfRating->getMean();
$losingMean = $opponentRating->getMean();
@ -128,10 +112,10 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
$rankMultiplier = 1;
}
$meanMultiplier = (square($selfRating->getStandardDeviation()) + square($gameInfo->getDynamicsFactor()))/$c;
$meanMultiplier = (BasicMatch::square($selfRating->getStandardDeviation()) + BasicMatch::square($gameInfo->getDynamicsFactor()))/$c;
$varianceWithDynamics = square($selfRating->getStandardDeviation()) + square($gameInfo->getDynamicsFactor());
$stdDevMultiplier = $varianceWithDynamics/square($c);
$varianceWithDynamics = BasicMatch::square($selfRating->getStandardDeviation()) + BasicMatch::square($gameInfo->getDynamicsFactor());
$stdDevMultiplier = $varianceWithDynamics/BasicMatch::square($c);
$newMean = $selfRating->getMean() + ($rankMultiplier*$meanMultiplier*$v);
$newStdDev = sqrt($varianceWithDynamics*(1 - $w*$stdDevMultiplier));
@ -157,9 +141,9 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
$player2Rating = $team2Ratings[0];
// We just use equation 4.1 found on page 8 of the TrueSkill 2006 paper:
$betaSquared = square($gameInfo->getBeta());
$player1SigmaSquared = square($player1Rating->getStandardDeviation());
$player2SigmaSquared = square($player2Rating->getStandardDeviation());
$betaSquared = BasicMatch::square($gameInfo->getBeta());
$player1SigmaSquared = BasicMatch::square($player1Rating->getStandardDeviation());
$player2SigmaSquared = BasicMatch::square($player2Rating->getStandardDeviation());
// This is the square root part of the equation:
$sqrtPart =
@ -171,11 +155,10 @@ class TwoPlayerTrueSkillCalculator extends SkillCalculator
// This is the exponent part of the equation:
$expPart =
exp(
(-1*square($player1Rating->getMean() - $player2Rating->getMean()))
(-1*BasicMatch::square($player1Rating->getMean() - $player2Rating->getMean()))
/
(2*(2*$betaSquared + $player1SigmaSquared + $player2SigmaSquared)));
return $sqrtPart*$expPart;
}
}
?>
}