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PaperMC/patches/api/0376-Friction-API.patch
2024-10-30 17:31:33 +01:00

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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 20:40:51 +0200
Subject: [PATCH] Friction API
diff --git a/src/main/java/io/papermc/paper/entity/Frictional.java b/src/main/java/io/papermc/paper/entity/Frictional.java
new file mode 100644
index 0000000000000000000000000000000000000000..315558d8a592f7238f45fd1e68b70476e721be92
--- /dev/null
+++ b/src/main/java/io/papermc/paper/entity/Frictional.java
@@ -0,0 +1,35 @@
+package io.papermc.paper.entity;
+
+import net.kyori.adventure.util.TriState;
+import org.bukkit.entity.Entity;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Represents an {@link Entity} that can experience friction with the air and ground.
+ */
+@NullMarked
+public interface Frictional {
+
+ /**
+ * Gets the friction state of this entity.
+ * When set to {@link TriState#TRUE}, the entity will always experience friction.
+ * When set to {@link TriState#FALSE}, the entity will never experience friction.
+ * When set to {@link TriState#NOT_SET}, the entity will fall back to Minecraft's default behaviour.
+ *
+ * @return the entity's friction state
+ */
+ TriState getFrictionState();
+
+ /**
+ * Sets the friction state of this entity.
+ * When set to {@link TriState#TRUE}, the entity will always experience friction.
+ * When set to {@link TriState#FALSE}, the entity will never experience friction.
+ * When set to {@link TriState#NOT_SET}, the entity will fall back to Minecraft's default behaviour.
+ * <p>
+ * Please note that changing this value will do nothing for a player.
+ *
+ * @param state the new friction state to set for the entity
+ */
+ void setFrictionState(TriState state);
+
+}
diff --git a/src/main/java/org/bukkit/entity/Item.java b/src/main/java/org/bukkit/entity/Item.java
index ced419f8655bff72f0257b639d5f7d73afe3c2e2..bcc6ba95bd21c7972865838c636a03f50b6c1f1a 100644
--- a/src/main/java/org/bukkit/entity/Item.java
+++ b/src/main/java/org/bukkit/entity/Item.java
@@ -8,7 +8,7 @@ import org.jetbrains.annotations.Nullable;
/**
* Represents a dropped item.
*/
-public interface Item extends Entity {
+public interface Item extends Entity, io.papermc.paper.entity.Frictional { // Paper
/**
* Gets the item stack associated with this item drop.
diff --git a/src/main/java/org/bukkit/entity/LivingEntity.java b/src/main/java/org/bukkit/entity/LivingEntity.java
index 9f3e2903c955f2a5d1b25825c49188df62d20cef..016529563381a674db8050cb328f9e8f16e72e93 100644
--- a/src/main/java/org/bukkit/entity/LivingEntity.java
+++ b/src/main/java/org/bukkit/entity/LivingEntity.java
@@ -27,7 +27,7 @@ import org.jetbrains.annotations.Nullable;
/**
* Represents a living entity, such as a monster or player
*/
-public interface LivingEntity extends Attributable, Damageable, ProjectileSource {
+public interface LivingEntity extends Attributable, Damageable, ProjectileSource, io.papermc.paper.entity.Frictional { // Paper
/**
* Gets the height of the living entity's eyes above its Location.
diff --git a/src/main/java/org/bukkit/entity/Minecart.java b/src/main/java/org/bukkit/entity/Minecart.java
index 148d8cddba48a886eddef72a3de63d5eaa15949f..52cac73b7680806299a92013bbf959ecacac824f 100644
--- a/src/main/java/org/bukkit/entity/Minecart.java
+++ b/src/main/java/org/bukkit/entity/Minecart.java
@@ -11,7 +11,7 @@ import org.jetbrains.annotations.Nullable;
/**
* Represents a minecart entity.
*/
-public interface Minecart extends Vehicle {
+public interface Minecart extends Vehicle, io.papermc.paper.entity.Frictional { // Paper
/**
* Sets a minecart's damage.