fix death xp drop calculation

Author: MidnightTale

atdeprecated-server/minecraft-patches/features/0003-Dispenser-place-boat-on-ice-packed-ice-blue-ice.patch

@@ -3,7 +3,6 @@ From: MidnightTale <[email protected]>
 Date: Sat, 19 Jul 2025 22:20:58 +0700
 Subject: [PATCH] Dispenser place boat on ice, packed ice, blue ice
 
-
 As part of: MidnightPatch (https://github.com/MidnightTale/MidnightPatch/blob/eda1116de584d17c9d5b79b5151ff18a533595d5/src/main/java/fun/mntale/midnightPatch/module/entity/boat/DispenserBoatListener.java)
 
 diff --git a/net/minecraft/core/dispenser/BoatDispenseItemBehavior.java b/net/minecraft/core/dispenser/BoatDispenseItemBehavior.java

atdeprecated-server/minecraft-patches/features/0007-Purpur-Barrels-and-enderchests-6-rows.patch

@@ -3,7 +3,6 @@ From: MidnightTale <[email protected]>
 Date: Sun, 20 Jul 2025 08:35:18 +0700
 Subject: [PATCH] Purpur: Barrels and enderchests 6 rows
 
-
 Co-authored by: William Blake Galbreath <[email protected]>
 As part of: Purpur (https://github.com/PurpurMC/Purpur/blob/09f547de09fc5d886f18f6d99ff389289766ec9d/purpur-server/minecraft-patches/features/0003-Barrels-and-enderchests-6-rows.patch)
 Licensed under: MIT (https://github.com/PurpurMC/Purpur/blob/09f547de09fc5d886f18f6d99ff389289766ec9d/LICENSE)

atdeprecated-server/minecraft-patches/features/0011-Native-Void-Descend-Gamerule.patch

@@ -3,7 +3,6 @@ From: MidnightTale <[email protected]>
 Date: Mon, 21 Jul 2025 17:02:07 +0700
 Subject: [PATCH] Native Void Descend Gamerule
 
-
 As part of: Descend (https://github.com/MidnightTale/Descend/blob/26dc4dca932e7315fca5fed22ae4aa01ae765803/src/main/java/fun/mntale/descend/Descend.java)
 
 diff --git a/net/minecraft/world/entity/LivingEntity.java b/net/minecraft/world/entity/LivingEntity.java

atdeprecated-server/minecraft-patches/features/0012-Fix-death-xp-drop-percentage-calculation.patch

@@ -0,0 +1,61 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: MidnightTale <[email protected]>
+Date: Mon, 21 Jul 2025 17:43:24 +0700
+Subject: [PATCH] Fix death xp drop percentage calculation
+
+
+diff --git a/net/minecraft/world/entity/player/Player.java b/net/minecraft/world/entity/player/Player.java
+index f8e0927db9fd500671b586589cb3ea72dfa226b2..be7bc0caafccdf3c9f6b140240b88e3696094349 100644
+--- a/net/minecraft/world/entity/player/Player.java
++++ b/net/minecraft/world/entity/player/Player.java
+@@ -1840,12 +1840,13 @@ public abstract class Player extends LivingEntity {
+ 
+     @Override
+     protected int getBaseExperienceReward(ServerLevel level) {
+-        // atDeprecated start - Use deathXpDropPercentage gamerule for XP drop
++        // atDeprecated start - Use deathXpDropPercentage gamerule for XP drop (fixed XP calculation)
+         if (!level.getGameRules().getBoolean(GameRules.RULE_KEEPINVENTORY) && !this.isSpectator()) {
+             int percent = level.getGameRules().getInt(GameRules.RULE_DEATH_XP_DROP_PERCENTAGE);
+             if (percent < 0) percent = 0;
+             if (percent > 100) percent = 100;
+-            return (int) (this.totalExperience * (percent / 100.0));
++            int xp = getTrueTotalExperience();
++            return (int) (xp * (percent / 100.0));
+         }
+         return 0;
+         // atDeprecated end
+@@ -2396,4 +2397,34 @@ public abstract class Player extends LivingEntity {
+         this.insomniaEnabled = enabled;
+     }
+     // atDeprecated end
++
++    // atDeprecated start - Correct XP calculation for death XP drop
++    public int getTrueTotalExperience() {
++        int exp = 0;
++        int level = this.experienceLevel;
++        exp += getExpAtLevel(level);
++        exp += Math.round(getExpToLevelUp(level) * this.experienceProgress);
++        return exp;
++    }
++
++    private int getExpAtLevel(int level) {
++        if (level <= 15) {
++            return level * level + 6 * level;
++        } else if (level <= 30) {
++            return 2 * level * level - 29 * level + 360;
++        } else {
++            return 5 * level * level - 151 * level + 2220;
++        }
++    }
++
++    private float getExpToLevelUp(int level) {
++        if (level <= 15) {
++            return 2 * level + 7;
++        } else if (level <= 30) {
++            return 5 * level - 38;
++        } else {
++            return 9 * level - 158;
++        }
++    }
++    // atDeprecated end
+ }