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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 9 Sep 2018 13:30:00 -0400
Subject: [PATCH] Mob Pathfinding API
Implements Pathfinding API for mobs
diff --git a/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java b/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java
new file mode 100644
index 0000000000000000000000000000000000000000..8c9f0c6c38627beded373ca29f1989ae3ba6f873
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/entity/PaperPathfinder.java
@@ -0,0 +1,139 @@
+package com.destroystokyo.paper.entity;
+
+import org.apache.commons.lang.Validate;
+import org.bukkit.Location;
+import org.bukkit.craftbukkit.entity.CraftLivingEntity;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Mob;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import net.minecraft.world.level.pathfinder.Node;
+import net.minecraft.world.level.pathfinder.Path;
+import java.util.ArrayList;
+import java.util.List;
+
+public class PaperPathfinder implements com.destroystokyo.paper.entity.Pathfinder {
+
+ private final net.minecraft.world.entity.Mob entity;
+
+ public PaperPathfinder(net.minecraft.world.entity.Mob entity) {
+ this.entity = entity;
+ }
+
+ @Override
+ public Mob getEntity() {
+ return entity.getBukkitMob();
+ }
+
+ @Override
+ public void stopPathfinding() {
+ entity.getNavigation().stop();
+ }
+
+ @Override
+ public boolean hasPath() {
+ return entity.getNavigation().getPath() != null;
+ }
+
+ @Nullable
+ @Override
+ public PathResult getCurrentPath() {
+ Path path = entity.getNavigation().getPath();
+ return path != null ? new PaperPathResult(path) : null;
+ }
+
+ @Nullable
+ @Override
+ public PathResult findPath(Location loc) {
+ Validate.notNull(loc, "Location can not be null");
+ Path path = entity.getNavigation().createPath(loc.getX(), loc.getY(), loc.getZ(), 0);
+ return path != null ? new PaperPathResult(path) : null;
+ }
+
+ @Nullable
+ @Override
+ public PathResult findPath(LivingEntity target) {
+ Validate.notNull(target, "Target can not be null");
+ Path path = entity.getNavigation().createPath(((CraftLivingEntity) target).getHandle(), 0);
+ return path != null ? new PaperPathResult(path) : null;
+ }
+
+ @Override
+ public boolean moveTo(@Nonnull PathResult path, double speed) {
+ Validate.notNull(path, "PathResult can not be null");
+ Path pathEntity = ((PaperPathResult) path).path;
+ return entity.getNavigation().moveTo(pathEntity, speed);
+ }
+
+ @Override
+ public boolean canOpenDoors() {
+ return entity.getNavigation().pathFinder.nodeEvaluator.canOpenDoors();
+ }
+
+ @Override
+ public void setCanOpenDoors(boolean canOpenDoors) {
+ entity.getNavigation().pathFinder.nodeEvaluator.setCanOpenDoors(canOpenDoors);
+ }
+
+ @Override
+ public boolean canPassDoors() {
+ return entity.getNavigation().pathFinder.nodeEvaluator.canPassDoors();
+ }
+
+ @Override
+ public void setCanPassDoors(boolean canPassDoors) {
+ entity.getNavigation().pathFinder.nodeEvaluator.setCanPassDoors(canPassDoors);
+ }
+
+ @Override
+ public boolean canFloat() {
+ return entity.getNavigation().pathFinder.nodeEvaluator.canFloat();
+ }
+
+ @Override
+ public void setCanFloat(boolean canFloat) {
+ entity.getNavigation().pathFinder.nodeEvaluator.setCanFloat(canFloat);
+ }
+
+ public class PaperPathResult implements com.destroystokyo.paper.entity.PaperPathfinder.PathResult {
+
+ private final Path path;
+ PaperPathResult(Path path) {
+ this.path = path;
+ }
+
+ @Nullable
+ @Override
+ public Location getFinalPoint() {
+ Node point = path.getEndNode();
+ return point != null ? toLoc(point) : null;
+ }
+
+ @Override
+ public List<Location> getPoints() {
+ List<Location> points = new ArrayList<>();
+ for (Node point : path.nodes) {
+ points.add(toLoc(point));
+ }
+ return points;
+ }
+
+ @Override
+ public int getNextPointIndex() {
+ return path.getNextNodeIndex();
+ }
+
+ @Nullable
+ @Override
+ public Location getNextPoint() {
+ if (!path.hasNext()) {
+ return null;
+ }
+ return toLoc(path.nodes.get(path.getNextNodeIndex()));
+ }
+ }
+
+ private Location toLoc(Node point) {
+ return new Location(entity.level.getWorld(), point.x, point.y, point.z);
+ }
+}
diff --git a/src/main/java/net/minecraft/world/level/pathfinder/Path.java b/src/main/java/net/minecraft/world/level/pathfinder/Path.java
index 4ad2ac8d1e9111933fa58c47442fa1f5e8173fd3..2a335f277bd0e4b8ad0f60d8226eb8aaa80a871f 100644
--- a/src/main/java/net/minecraft/world/level/pathfinder/Path.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/Path.java
@@ -21,6 +21,7 @@ public class Path {
private final BlockPos target;
private final float distToTarget;
private final boolean reached;
+ public boolean hasNext() { return getNextNodeIndex() < this.nodes.size(); } // Paper
public Path(List<Node> nodes, BlockPos target, boolean reachesTarget) {
this.nodes = nodes;
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
index 219bdf53a860628335efe92d4f294a5fa52087b2..b0d348061487110993b6c4c8a7dc7208f27361b3 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftMob.java
@@ -12,8 +12,11 @@ import org.bukkit.loot.LootTable;
public abstract class CraftMob extends CraftLivingEntity implements Mob {
public CraftMob(CraftServer server, net.minecraft.world.entity.Mob entity) {
super(server, entity);
+ paperPathfinder = new com.destroystokyo.paper.entity.PaperPathfinder(entity); // Paper
}
+ private final com.destroystokyo.paper.entity.PaperPathfinder paperPathfinder; // Paper
+ @Override public com.destroystokyo.paper.entity.Pathfinder getPathfinder() { return paperPathfinder; } // Paper
@Override
public void setTarget(LivingEntity target) {
Preconditions.checkState(!this.getHandle().generation, "Cannot set target during world generation");
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