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79 lines
3.8 KiB
Diff
79 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Fri, 15 Jun 2018 00:30:32 -0400
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Subject: [PATCH] Configurable Alternative LootPool Luck Formula
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Rewrites the Vanilla luck application formula so that luck can be
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applied to items that do not have any quality defined.
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See: https://luckformula.emc.gs for data and details
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-----------
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The rough summary is:
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My goal was that in a pool, when luck was applied, the pool
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rebalances so the percentages for bigger items is
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lowered and smaller items is boosted.
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Do this by boosting and then reducing the weight value,
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so that larger numbers are penalized more than smaller numbers.
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resulting in a larger reduction of entries for more common
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items than the reduction on small weights,
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giving smaller weights more of a chance
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-----------
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This work kind of obsoletes quality, but quality would be useful
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for 2 items with same weight that you want luck to impact
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in varying directions.
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Fishing still falls into that as the weights are closer, so luck
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will invalidate junk more.
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This change will result in some major changes to fishing formulas.
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-----------
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I would love to see this change in Vanilla, so Mojang please pull :)
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diff --git a/src/main/java/net/minecraft/world/level/storage/loot/entries/LootPoolSingletonContainer.java b/src/main/java/net/minecraft/world/level/storage/loot/entries/LootPoolSingletonContainer.java
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index 7a52d03c488fb1e277228914b810e2d6e02beaef..4fbb0f7fefcb383c25c1c4df2e788d9a153ae376 100644
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--- a/src/main/java/net/minecraft/world/level/storage/loot/entries/LootPoolSingletonContainer.java
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+++ b/src/main/java/net/minecraft/world/level/storage/loot/entries/LootPoolSingletonContainer.java
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@@ -122,9 +122,35 @@ public abstract class LootPoolSingletonContainer extends LootPoolEntryContainer
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protected abstract class EntryBase implements LootPoolEntry {
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@Override
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public int getWeight(float luck) {
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- return Math.max(Mth.floor((float)LootPoolSingletonContainer.this.weight + (float)LootPoolSingletonContainer.this.quality * luck), 0);
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+ // Paper start - Offer an alternative loot formula to refactor how luck bonus applies
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+ // SEE: https://luckformula.emc.gs for details and data
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+ if (LootPoolSingletonContainer.this.lastLuck != null && LootPoolSingletonContainer.this.lastLuck == luck) {
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+ return lastWeight;
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+ }
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+ // This is vanilla
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+ float qualityModifer = (float) LootPoolSingletonContainer.this.quality * luck;
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+ double baseWeight = (LootPoolSingletonContainer.this.weight + qualityModifer);
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+ if (io.papermc.paper.configuration.GlobalConfiguration.get().misc.useAlternativeLuckFormula) {
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+ // Random boost to avoid losing precision in the final int cast on return
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+ final int weightBoost = 100;
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+ baseWeight *= weightBoost;
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+ // If we have vanilla 1, bump that down to 0 so nothing is is impacted
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+ // vanilla 3 = 300, 200 basis = impact 2%
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+ // =($B2*(($B2-100)/100/100))
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+ double impacted = baseWeight * ((baseWeight - weightBoost) / weightBoost / 100);
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+ // =($B$7/100)
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+ float luckModifier = Math.min(100, luck * 10) / 100;
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+ // =B2 - (C2 *($B$7/100))
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+ baseWeight = Math.ceil(baseWeight - (impacted * luckModifier));
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+ }
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+ LootPoolSingletonContainer.this.lastLuck = luck;
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+ LootPoolSingletonContainer.this.lastWeight = (int) Math.max(Math.floor(baseWeight), 0);
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+ return lastWeight;
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}
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}
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+ private Float lastLuck = null;
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+ private int lastWeight = 0;
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+ // Paper end
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@FunctionalInterface
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protected interface EntryConstructor {
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