Fachschaft/KickerELO
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Use actual ELO calculation for 1 vs 1

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This commit is contained in:
Anton Micke
2025-03-07 14:58:53 +01:00
parent 76bb3ded81
commit bffee21de9
1 changed files with 12 additions and 5 deletions
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17
src/main/java/org/kickerelo/kickerelo/service/EloCalculationService.java
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@@ -9,9 +9,8 @@ import org.springframework.stereotype.Service;
*/
@Service
public class EloCalculationService {
// Default ELOs for a player with 0 games
final float initialElo1vs1 = 1500;
final float initialElo2vs2 = 1500;
private final float initialElo1vs1 = 1500;
private final float initialElo2vs2 = 1500;
/**
* Updates the 1 vs 1 ELOs of the players according to the result of the game.
@@ -20,8 +19,16 @@ public class EloCalculationService {
* @param toreVerlierer The number of goals of the losing player
*/
public void updateElo1vs1(Spieler gewinner, Spieler verlierer, short toreVerlierer) {
gewinner.setElo1vs1(gewinner.getElo1vs1() + 10 - toreVerlierer);
verlierer.setElo1vs1(verlierer.getElo1vs1() - 10 + toreVerlierer);
final float initialElo = 1500;
final float baseK = 50;
final float reductionPerGoal = 0.1f * baseK;
final float finalK = baseK - (reductionPerGoal * toreVerlierer);
float expectedScoreWinner = (float) (1 / (1 + Math.pow(10, (verlierer.getElo1vs1() - gewinner.getElo1vs1()) / 400)));
float expectedScoreLoser = (float) (1 / (1 + Math.pow(10, (gewinner.getElo1vs1() - verlierer.getElo1vs1()) / 400)));
gewinner.setElo1vs1(gewinner.getElo1vs1() + finalK * (1-expectedScoreWinner));
verlierer.setElo1vs1(verlierer.getElo1vs1() - finalK * expectedScoreLoser);
}
/**