Paper/Spigot-API-Patches/0148-Mob-Pathfinding-API.patch
Shane Freeder b68b282439
Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Warning: this commit contains more mapping changes from upstream, As always, ensure that you
have working backups and test this build before deployment; Developers working on paper will,
yet again, need to delete their work/Minecraft/1.13.2 folder

Bukkit Changes:
7fca5fd4 SPIGOT-4558: Preserve user order in the face of copied defaults in configurations
15c9b1eb Ignore spurious slot IDs sent by client, e.g. in enchanting tables
5d2a10c5 SPIGOT-3747: Add API for force loaded chunks
d6dd2bb3 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent
771db4aa SPIGOT-794: Call EntityPlaceEvent for Minecart placement
55462509 Add InventoryView#getSlotType
2f3ce5b6 Remove EntityTransformEvent and CustomItemTagContainer from draft API
f04ad7b6 Make ProjectileLaunchEvent extend EntitySpawnEvent
ccb85808 Define EntitySpawnEvent
b8cc3ebe Add PlayerItemDamageEvent
184a495d Ease ClassLoader Deadlocks Where Possible
11ac4728 Expand Boolean Prompt Values in Conversation API
aae62d51 Added getAllSessionData() to the Conversation API.
9290ff91 Add InventoryView#getInventory API
995e530f Add API to get / set base arrow damage

CraftBukkit Changes:
c4a67eed SPIGOT-4556: Fix plugins closing inventory during drop events
5be2ddcb Replace version constants with methods to prevent compiler inlining
a5b9c7b3 Use API method to create offset command completions
2bc7d1df SPIGOT-3747: Add API for force loaded chunks
a408f375 SPIGOT-3538: Add getHitBlockFace for ProjectileHitEvent
b54b9409 SPIGOT-2864: Make Arrow / Item setTicksLived behave like FallingBlock
79ded7a8 SPIGOT-1811: Death message not shown on respawn screen
b4a4f15d SPIGOT-943: InventoryCloseEvent called on death regardless of open inventory
0afed592 SPIGOT-794: Call EntityPlaceEvent for Minecart placement
2b2d084a Add InventoryView#getSlotType
01a9959a Do not use deprecated ItemSpawnEvent constructor
9642498d SPIGOT-4547: Call EntitySpawnEvent as general spawn fallback event
963f4a5f Add PlayerItemDamageEvent
63db0445 Add API to get / set base arrow damage
531c25d7 Add CraftMagicNumbers.MAPPINGS_VERSION for use by NMS plugins
d05c8b14 Mappings Update
bd36e200 SPIGOT-4551: Ignore invalid attribute modifier slots

Spigot Changes:
518206a1 Remove redundant trove depend
1959ad21 MC-11211,SPIGOT-4552: Fix placing double slabs at y = 255
29ab5e43 SPIGOT-3661: Allow arguments in restart-script
7cc46316 SPIGOT-852: Growth modifiers for beetroots, potatoes, carrots
82e117e1 Squelch "fatal: Resolve operation not in progress" message
0a1a68e7 Mappings Update & Patch Rebuild
2019-01-01 03:29:51 +00:00

209 lines
7.5 KiB
Diff

From e56639fa55ad0e1d2a489c71c999dfba9aafda53 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 9 Sep 2018 12:39:06 -0400
Subject: [PATCH] Mob Pathfinding API
Adds an API to allow plugins to instruct a Mob to Pathfind to a Location or Entity
This does not do anything to stop other AI rules from changing the location, so
it is still up to the plugin to control that or override after another goal changed
the location.
You can use EntityPathfindEvent to cancel new pathfinds from overriding your current.
diff --git a/src/main/java/com/destroystokyo/paper/entity/Pathfinder.java b/src/main/java/com/destroystokyo/paper/entity/Pathfinder.java
new file mode 100644
index 00000000..d6953b39
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/entity/Pathfinder.java
@@ -0,0 +1,167 @@
+package com.destroystokyo.paper.entity;
+
+import org.bukkit.Location;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Mob;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.List;
+
+/**
+ * Handles pathfinding operations for an Entity
+ */
+public interface Pathfinder {
+
+ /**
+ *
+ * @return The entity that is controlled by this pathfinder
+ */
+ Mob getEntity();
+
+ /**
+ * Instructs the Entity to stop trying to navigate to its current desired location
+ */
+ void stopPathfinding();
+
+ /**
+ * If the entity is currently trying to navigate to a destination, this will return true
+ * @return true if the entity is navigating to a destination
+ */
+ boolean hasPath();
+
+ /**
+ * @return The location the entity is trying to navigate to, or null if there is no destination
+ */
+ @Nullable PathResult getCurrentPath();
+
+ /**
+ * Calculates a destination for the Entity to navigate to, but does not set it
+ * as the current target. Useful for calculating what would happen before setting it.
+ * @param loc Location to navigate to
+ * @return The closest Location the Entity can get to for this navigation, or null if no path could be calculated
+ */
+ @Nullable PathResult findPath(Location loc);
+
+ /**
+ * Calculates a destination for the Entity to navigate to to reach the target entity,
+ * but does not set it as the current target.
+ * Useful for calculating what would happen before setting it.
+ *
+ * The behavior of this PathResult is subject to the games pathfinding rules, and may
+ * result in the pathfinding automatically updating to follow the target Entity.
+ *
+ * However, this behavior is not guaranteed, and is subject to the games behavior.
+ *
+ * @param target the Entity to navigate to
+ * @return The closest Location the Entity can get to for this navigation, or null if no path could be calculated
+ */
+ @Nullable PathResult findPath(LivingEntity target);
+
+ /**
+ * Calculates a destination for the Entity to navigate to, and sets it with default speed
+ * as the current target.
+ * @param loc Location to navigate to
+ * @return If the pathfinding was successfully started
+ */
+ default boolean moveTo(@Nonnull Location loc) {
+ return moveTo(loc, 1);
+ }
+
+ /**
+ * Calculates a destination for the Entity to navigate to, with desired speed
+ * as the current target.
+ * @param loc Location to navigate to
+ * @param speed Speed multiplier to navigate at, where 1 is 'normal'
+ * @return If the pathfinding was successfully started
+ */
+ default boolean moveTo(@Nonnull Location loc, double speed) {
+ PathResult path = findPath(loc);
+ return path != null && moveTo(path, speed);
+ }
+
+ /**
+ * Calculates a destination for the Entity to navigate to to reach the target entity,
+ * and sets it with default speed.
+ *
+ * The behavior of this PathResult is subject to the games pathfinding rules, and may
+ * result in the pathfinding automatically updating to follow the target Entity.
+ *
+ * However, this behavior is not guaranteed, and is subject to the games behavior.
+ *
+ * @param target the Entity to navigate to
+ * @return If the pathfinding was successfully started
+ */
+ default boolean moveTo(@Nonnull LivingEntity target) {
+ return moveTo(target, 1);
+ }
+
+ /**
+ * Calculates a destination for the Entity to navigate to to reach the target entity,
+ * and sets it with specified speed.
+ *
+ * The behavior of this PathResult is subject to the games pathfinding rules, and may
+ * result in the pathfinding automatically updating to follow the target Entity.
+ *
+ * However, this behavior is not guaranteed, and is subject to the games behavior.
+ *
+ * @param target the Entity to navigate to
+ * @param speed Speed multiplier to navigate at, where 1 is 'normal'
+ * @return If the pathfinding was successfully started
+ */
+ default boolean moveTo(@Nonnull LivingEntity target, double speed) {
+ PathResult path = findPath(target);
+ return path != null && moveTo(path, speed);
+ }
+
+ /**
+ * Takes the result of a previous pathfinding calculation and sets it
+ * as the active pathfinding with default speed.
+ *
+ * @param path The Path to start following
+ * @return If the pathfinding was successfully started
+ */
+ default boolean moveTo(@Nonnull PathResult path) {
+ return moveTo(path, 1);
+ }
+
+ /**
+ * Takes the result of a previous pathfinding calculation and sets it
+ * as the active pathfinding,
+ *
+ * @param path The Path to start following
+ * @param speed Speed multiplier to navigate at, where 1 is 'normal'
+ * @return If the pathfinding was successfully started
+ */
+ boolean moveTo(@Nonnull PathResult path, double speed);
+
+ /**
+ * Represents the result of a pathfinding calculation
+ */
+ interface PathResult {
+
+ /**
+ * All currently calculated points to follow along the path to reach the destination location
+ *
+ * Will return points the entity has already moved past, see {@link #getNextPointIndex()}
+ * @return List of points
+ */
+ List<Location> getPoints();
+
+ /**
+ * @return Returns the index of the current point along the points returned in {@link #getPoints()} the entity
+ * is trying to reach, or null if we are done with this pathfinding.
+ */
+ int getNextPointIndex();
+
+ /**
+ * @return The next location in the path points the entity is trying to reach, or null if there is no next point
+ */
+ @Nullable Location getNextPoint();
+
+ /**
+ * @return The closest point the path can get to the target location
+ */
+ @Nullable Location getFinalPoint();
+ }
+}
diff --git a/src/main/java/org/bukkit/entity/Mob.java b/src/main/java/org/bukkit/entity/Mob.java
index d029d34e..48eddcd3 100644
--- a/src/main/java/org/bukkit/entity/Mob.java
+++ b/src/main/java/org/bukkit/entity/Mob.java
@@ -7,6 +7,14 @@ import org.bukkit.loot.Lootable;
*/
public interface Mob extends LivingEntity, Lootable {
+ // Paper start
+ /**
+ * Enables access to control the pathing of an Entity
+ * @return Pathfinding Manager for this entity
+ */
+ com.destroystokyo.paper.entity.Pathfinder getPathfinder();
+ // Paper end
+
/**
* Instructs this Mob to set the specified LivingEntity as its target.
* <p>
--
2.20.1