restrict ladders to players of last 30 days, slightly increase decay, much lower ranking threshold

Author: DeinFreund

Shared/PlasmaShared/GlobalConst.cs

@@ -135,10 +135,10 @@ public static BasicHttpBinding CreateBasicHttpBinding()
         public const int MinDurationForElo = 60;
         public const int MinDurationForPlanetwars = 0;
 
-        public const int LadderActivityDays = 70;
+        public const int LadderActivityDays = 30;
         public const int LadderSize = 50; // Amount of players shown on ladders
-        public const float MinimumDynamicMaxLadderUncertainty = 50; // uncertainties > this are marked unranked, max age ~ 2-3 months
-        public const float EloDecayPerDaySquared = 30; //whr thingie
+        public const float MinimumDynamicMaxLadderUncertainty = 100; // uncertainties > this are marked unranked, max age ~ 2-3 months
+        public const float EloDecayPerDaySquared = 35; //whr thingie
         public const float LadderUpdatePeriod = 1; //Ladder is fully updated every X hours
 
         public const int XpForMissionOrBots = 25;

ZkData/Ef/WHR/WholeHistoryRating.cs

@@ -347,8 +347,10 @@ private void UpdateRankings(IEnumerable<Player> players)
                 float[] playerUncertainties = new float[playerRatings.Count];
                 int index = 0;
                 float DynamicMaxUncertainty = GlobalConst.MinimumDynamicMaxLadderUncertainty;
+                int maxAge = GlobalConst.LadderActivityDays;
                 foreach (var pair in playerRatings)
                 {
+                    if (currentDay - pair.Value.LastGameDate > maxAge) continue;
                     playerUncertainties[index++] = (float)pair.Value.Uncertainty;
                 }
                 Array.Sort(playerUncertainties);
@@ -359,7 +361,7 @@ private void UpdateRankings(IEnumerable<Player> players)
                 int matched = 0;
                 foreach (var pair in sortedPlayers)
                 {
-                    if (playerRatings[pair.Value].Uncertainty <= DynamicMaxUncertainty)
+                    if (playerRatings[pair.Value].Uncertainty <= DynamicMaxUncertainty && currentDay - playerRatings[pair.Value].LastGameDate <= maxAge)
                     {
                         newTopPlayers.Add(pair.Value);
                         if (rank == matched && rank < topPlayers.Count && topPlayers[rank] == pair.Value) matched++;