Player: Modified reputation gain calculations

src/game/Entities/Player.cpp

@@ -6282,15 +6282,27 @@ int32 Player::CalculateReputationGain(ReputationSource source, int32 rep, int32
 
     uint32 currentLevel = GetLevel();
 
-    if (MaNGOS::XP::IsTrivialLevelDifference(currentLevel, creatureOrQuestLevel))
-        percent *= minRate;
-    else
+    // Level zero seems to be treated as always equal to players current level in IsTrivialLevelDifference therefore I have skipped level difference penalty computations for that value
+    if (creatureOrQuestLevel > 0)
     {
-        // Pre-3.0.8: Declines with 20% for each level if 6 levels or more below the player down to a minimum (default: 20%)
-        const uint32 treshold = (creatureOrQuestLevel + 5);
+        // Old code seems to have been correct for computing level difference penalties for quests
+        if (source == REPUTATION_SOURCE_KILL)
+        {
+            if (MaNGOS::XP::IsTrivialLevelDifference(currentLevel, creatureOrQuestLevel))
+            {
+                // For kill reputiation gains the penalties value seems to have been 20% for each level below lowest green level down to a minimum (default: 20%)
+                const uint32 greenRange = MaNGOS::XP::GetQuestGreenRange(currentLevel);
+                percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - greenRange - creatureOrQuestLevel))));
+            }
 
-        if (currentLevel > treshold)
-            percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - treshold))));
+        } else if (source == REPUTATION_SOURCE_QUEST)
+        {
+            // Pre-3.0.8: Declines with 20% for each level if 6 levels or more below the player down to a minimum (default: 20%)
+            const uint32 treshold = (creatureOrQuestLevel + 5);
+
+            if (currentLevel > treshold)
+                percent *= std::max(minRate, (1.0f - (0.2f * (currentLevel - treshold))));
+        }
     }
 
     if (percent <= 0.0f)

src/game/Tools/Formulas.h

@@ -271,6 +271,36 @@ namespace MaNGOS
             return false;
         }
 
+        inline uint32 GetQuestGreenRange(uint32 unitLvl)
+        {
+            switch (unitLvl / 5)
+            {
+            case 0:     // 0-4
+            case 1:     // 5-9
+                return 4;
+            case 2:     // 10-14
+            case 3:     // 15-19
+                return 5;
+            case 4:     // 20-24
+            case 5:     // 25-29
+                return 6;
+            case 6:     // 30-34
+            case 7:     // 35-39
+                return 7;
+            case 8:     // 40-44
+                return 8;
+            case 9:     // 45-49
+                return 9;
+            case 10:    // 50-54
+                return 10;
+            case 11:    // 55-59
+                return 11;
+            default:    // 60+
+                return 12;
+            }
+            return false;
+        }
+
         enum XPColorChar { RED, ORANGE, YELLOW, GREEN, GRAY };
 
         inline uint32 GetGrayLevel(uint32 pl_level)
@@ -281,7 +311,7 @@ namespace MaNGOS
                 return pl_level - 5 - pl_level / 10;
             if (pl_level <= 59)
                 return pl_level - 1 - pl_level / 5;
-            return pl_level - 9;
+            return pl_level - 13;
         }
 
         inline XPColorChar GetColorCode(uint32 pl_level, uint32 mob_level)