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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Noah van der Aa <ndvdaa@gmail.com>
Date: Wed, 15 Sep 2021 20:44:22 +0200
Subject: [PATCH] Friction API
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index cbe672e213b53b1939ba0dcb2e9640ec16d83807..7a6caded7f5c711e96fa0d6b177923c2a49004e4 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -263,6 +263,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
public boolean bukkitPickUpLoot;
public org.bukkit.craftbukkit.entity.CraftLivingEntity getBukkitLivingEntity() { return (org.bukkit.craftbukkit.entity.CraftLivingEntity) super.getBukkitEntity(); } // Paper
public boolean silentDeath = false; // Paper - mark entity as dying silently for cancellable death event
+ public net.kyori.adventure.util.TriState frictionState = net.kyori.adventure.util.TriState.NOT_SET; // Paper
@Override
public float getBukkitYaw() {
@@ -718,7 +719,7 @@ public abstract class LivingEntity extends Entity implements Attackable {
}
public boolean shouldDiscardFriction() {
- return this.discardFriction;
+ return !this.frictionState.toBooleanOrElse(!this.discardFriction); // Paper
}
public void setDiscardFriction(boolean noDrag) {
@@ -762,6 +763,11 @@ public abstract class LivingEntity extends Entity implements Attackable {
@Override
public void addAdditionalSaveData(CompoundTag nbt) {
+ // Paper start
+ if (this.frictionState != net.kyori.adventure.util.TriState.NOT_SET) {
+ nbt.putString("Paper.FrictionState", this.frictionState.toString());
+ }
+ // Paper end
nbt.putFloat("Health", this.getHealth());
nbt.putShort("HurtTime", (short) this.hurtTime);
nbt.putInt("HurtByTimestamp", this.lastHurtByMobTimestamp);
@@ -804,6 +810,15 @@ public abstract class LivingEntity extends Entity implements Attackable {
absorptionAmount = 0;
}
this.setAbsorptionAmount(absorptionAmount);
+
+ if (nbt.contains("Paper.FrictionState")) {
+ String fs = nbt.getString("Paper.FrictionState");
+ try {
+ frictionState = net.kyori.adventure.util.TriState.valueOf(fs);
+ } catch (Exception ignored) {
+ LOGGER.error("Unknown friction state " + fs + " for " + this);
+ }
+ }
// Paper end
if (nbt.contains("Attributes", 9) && this.level() != null && !this.level().isClientSide) {
this.getAttributes().load(nbt.getList("Attributes", 10));
diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
index 6ee24fbe6528f91306a0eb38b766f77b2228b4aa..d59841d65c76abd740e391cfdba09a0e167ec591 100644
--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
@@ -54,6 +54,7 @@ public class ItemEntity extends Entity implements TraceableEntity {
private int lastTick = MinecraftServer.currentTick - 1; // CraftBukkit
public boolean canMobPickup = true; // Paper
private int despawnRate = -1; // Paper
+ public net.kyori.adventure.util.TriState frictionState = net.kyori.adventure.util.TriState.NOT_SET; // Paper
public ItemEntity(EntityType<? extends ItemEntity> type, Level world) {
super(type, world);
@@ -159,7 +160,11 @@ public class ItemEntity extends Entity implements TraceableEntity {
this.move(MoverType.SELF, this.getDeltaMovement());
float f1 = 0.98F;
- if (this.onGround()) {
+ // Paper start
+ if (frictionState == net.kyori.adventure.util.TriState.FALSE) {
+ f1 = 1F;
+ } else if (this.onGround()) {
+ // Paper end
f1 = this.level().getBlockState(this.getBlockPosBelowThatAffectsMyMovement()).getBlock().getFriction() * 0.98F;
}
@@ -364,6 +369,11 @@ public class ItemEntity extends Entity implements TraceableEntity {
@Override
public void addAdditionalSaveData(CompoundTag nbt) {
+ // Paper start
+ if (this.frictionState != net.kyori.adventure.util.TriState.NOT_SET) {
+ nbt.putString("Paper.FrictionState", this.frictionState.toString());
+ }
+ // Paper end
nbt.putShort("Health", (short) this.health);
nbt.putShort("Age", (short) this.age);
nbt.putShort("PickupDelay", (short) this.pickupDelay);
@@ -397,6 +407,17 @@ public class ItemEntity extends Entity implements TraceableEntity {
this.thrower = nbt.getUUID("Thrower");
}
+ // Paper start
+ if (nbt.contains("Paper.FrictionState")) {
+ String fs = nbt.getString("Paper.FrictionState");
+ try {
+ frictionState = net.kyori.adventure.util.TriState.valueOf(fs);
+ } catch (Exception ignored) {
+ com.mojang.logging.LogUtils.getLogger().error("Unknown friction state " + fs + " for " + this);
+ }
+ }
+ // Paper end
+
CompoundTag nbttagcompound1 = nbt.getCompound("Item");
this.setItem(ItemStack.of(nbttagcompound1));
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
index e9946edf568db010e4ccb9fe7755709ed7b8310f..a925b5c490e7129b27370aa57b5fad1cf05530c6 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftItem.java
@@ -103,6 +103,18 @@ public class CraftItem extends CraftEntity implements Item {
item.age = willAge ? 0 : NO_AGE_TIME;
}
+ @org.jetbrains.annotations.NotNull
+ @Override
+ public net.kyori.adventure.util.TriState getFrictionState() {
+ return this.item.frictionState;
+ }
+
+ @Override
+ public void setFrictionState(@org.jetbrains.annotations.NotNull net.kyori.adventure.util.TriState state) {
+ java.util.Objects.requireNonNull(state, "state may not be null");
+ this.item.frictionState = state;
+ }
+
@Override
public int getHealth() {
return item.health;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
index 56b55e9217c514fbdf44a7e2f44769ff4e8ccee1..2d5f407b6979f39e5b611f37578d681a49eaea03 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
@@ -1043,6 +1043,18 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
});
}
+ @org.jetbrains.annotations.NotNull
+ @Override
+ public net.kyori.adventure.util.TriState getFrictionState() {
+ return this.getHandle().frictionState;
+ }
+
+ @Override
+ public void setFrictionState(@org.jetbrains.annotations.NotNull net.kyori.adventure.util.TriState state) {
+ java.util.Objects.requireNonNull(state, "state may not be null");
+ this.getHandle().frictionState = state;
+ }
+
@Override
public void knockback(double strength, double directionX, double directionZ) {
Preconditions.checkArgument(strength > 0, "Knockback strength must be > 0");
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