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Paper/Spigot-Server-Patches/0367-Prevent-pathfinding-from-loading-chunks.patch
Aikar fd84aa5c42
Fix pathfinding NPE - Fixes #1435
2018-09-12 21:17:59 -04:00

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From 89178baf536b0d8aaa0e0cb18e96101509ce62a3 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 10 Sep 2018 23:52:28 -0400
Subject: [PATCH] Prevent pathfinding from loading chunks
diff --git a/src/main/java/net/minecraft/server/NavigationAbstract.java b/src/main/java/net/minecraft/server/NavigationAbstract.java
index 4023253f42..113fd9a50f 100644
--- a/src/main/java/net/minecraft/server/NavigationAbstract.java
+++ b/src/main/java/net/minecraft/server/NavigationAbstract.java
@@ -21,13 +21,15 @@ public abstract class NavigationAbstract {
protected long n;
protected PathfinderAbstract o;
private BlockPosition q;
- private Pathfinder r;
+ private Pathfinder r; public Pathfinder getPathfinder() { return r; } // Paper - OBFHELPER
+ private void setWorld() { if (getPathfinder() != null && getPathfinder().getPathfinder() != null) getPathfinder().getPathfinder().world = getEntity().world; } // Paper
public NavigationAbstract(EntityInsentient entityinsentient, World world) {
this.a = entityinsentient;
this.b = world;
this.p = entityinsentient.getAttributeInstance(GenericAttributes.FOLLOW_RANGE);
this.r = this.a();
+ setWorld(); // Paper
}
public BlockPosition i() {
@@ -166,6 +168,7 @@ public abstract class NavigationAbstract {
}
public void d() {
+ setWorld(); // Paper
++this.e;
if (this.m) {
this.l();
diff --git a/src/main/java/net/minecraft/server/Pathfinder.java b/src/main/java/net/minecraft/server/Pathfinder.java
index 04c71ac0ef..6e583356ce 100644
--- a/src/main/java/net/minecraft/server/Pathfinder.java
+++ b/src/main/java/net/minecraft/server/Pathfinder.java
@@ -8,7 +8,7 @@ public class Pathfinder {
private final Path a = new Path();
private final Set<PathPoint> b = Sets.newHashSet();
private final PathPoint[] c = new PathPoint[32];
- private PathfinderAbstract d;
+ private PathfinderAbstract d; public PathfinderAbstract getPathfinder() { return d; } // Paper - OBFHELPER
public Pathfinder(PathfinderAbstract pathfinderabstract) {
this.d = pathfinderabstract;
diff --git a/src/main/java/net/minecraft/server/PathfinderAbstract.java b/src/main/java/net/minecraft/server/PathfinderAbstract.java
index ba7fe359fe..6716280146 100644
--- a/src/main/java/net/minecraft/server/PathfinderAbstract.java
+++ b/src/main/java/net/minecraft/server/PathfinderAbstract.java
@@ -3,6 +3,7 @@ package net.minecraft.server;
public abstract class PathfinderAbstract {
protected IBlockAccess a;
protected EntityInsentient b;
+ public World world; // Paper
protected final IntHashMap<PathPoint> c = new IntHashMap<PathPoint>();
protected int d;
protected int e;
@@ -16,6 +17,7 @@ public abstract class PathfinderAbstract {
public void a(IBlockAccess iblockaccess, EntityInsentient entityinsentient) {
this.a = iblockaccess;
+ if (iblockaccess instanceof World) world = (World) iblockaccess; // Paper
this.b = entityinsentient;
this.c.c();
this.d = MathHelper.d(entityinsentient.width + 1.0F);
diff --git a/src/main/java/net/minecraft/server/PathfinderNormal.java b/src/main/java/net/minecraft/server/PathfinderNormal.java
index 64e0b08170..93f3d2e363 100644
--- a/src/main/java/net/minecraft/server/PathfinderNormal.java
+++ b/src/main/java/net/minecraft/server/PathfinderNormal.java
@@ -47,7 +47,7 @@ public class PathfinderNormal extends PathfinderAbstract {
BlockPosition blockposition2 = new BlockPosition(this.b);
PathType pathtype1 = this.a(this.b, blockposition2.getX(), i, blockposition2.getZ());
if (this.b.a(pathtype1) < 0.0F) {
- HashSet hashset = Sets.newHashSet();
+ HashSet<BlockPosition> hashset = Sets.newHashSet(); // Paper - decompile fix
hashset.add(new BlockPosition(this.b.getBoundingBox().a, (double)i, this.b.getBoundingBox().c));
hashset.add(new BlockPosition(this.b.getBoundingBox().a, (double)i, this.b.getBoundingBox().f));
hashset.add(new BlockPosition(this.b.getBoundingBox().d, (double)i, this.b.getBoundingBox().c));
@@ -233,7 +233,7 @@ public class PathfinderNormal extends PathfinderAbstract {
}
public PathType a(IBlockAccess iblockaccess, int i, int jx, int k, EntityInsentient entityinsentient, int l, int i1, int j1, boolean flag, boolean flag1) {
- EnumSet enumset = EnumSet.noneOf(PathType.class);
+ EnumSet<PathType> enumset = EnumSet.noneOf(PathType.class); // Paper - decompile fix
PathType pathtype = PathType.BLOCKED;
double d0 = (double)entityinsentient.width / 2.0D;
BlockPosition blockposition = new BlockPosition(entityinsentient);
@@ -304,7 +304,8 @@ public class PathfinderNormal extends PathfinderAbstract {
public PathType a(IBlockAccess iblockaccess, int i, int jx, int k) {
PathType pathtype = this.b(iblockaccess, i, jx, k);
if (pathtype == PathType.OPEN && jx >= 1) {
- Block block = iblockaccess.getType(new BlockPosition(i, jx - 1, k)).getBlock();
+ Block block = world.getBlockIfLoaded(new BlockPosition(i, jx - 1, k)); // Paper
+ if (block == null) return PathType.BLOCKED; // Paper
PathType pathtype1 = this.b(iblockaccess, i, jx - 1, k);
pathtype = pathtype1 != PathType.WALKABLE && pathtype1 != PathType.OPEN && pathtype1 != PathType.WATER && pathtype1 != PathType.LAVA ? PathType.WALKABLE : PathType.OPEN;
if (pathtype1 == PathType.DAMAGE_FIRE || block == Blocks.MAGMA_BLOCK) {
@@ -326,8 +327,9 @@ public class PathfinderNormal extends PathfinderAbstract {
for(int l = -1; l <= 1; ++l) {
for(int i1 = -1; i1 <= 1; ++i1) {
if (l != 0 || i1 != 0) {
- Block block = iblockaccess.getType(blockposition$b.f(l + i, jx, i1 + k)).getBlock();
- if (block == Blocks.CACTUS) {
+ Block block = world.getBlockIfLoaded(blockposition$b.f(l + i, jx, i1 + k)); // Paper
+ if (block == null) pathtype = PathType.BLOCKED; // Paper
+ else if (block == Blocks.CACTUS) { // Paper
pathtype = PathType.DANGER_CACTUS;
} else if (block == Blocks.FIRE) {
pathtype = PathType.DANGER_FIRE;
@@ -343,7 +345,8 @@ public class PathfinderNormal extends PathfinderAbstract {
protected PathType b(IBlockAccess iblockaccess, int i, int jx, int k) {
BlockPosition blockposition = new BlockPosition(i, jx, k);
- IBlockData iblockdata = iblockaccess.getType(blockposition);
+ IBlockData iblockdata = world.getTypeIfLoaded(blockposition); // Paper
+ if (iblockdata == null) return PathType.BLOCKED; // Paper
Block block = iblockdata.getBlock();
Material material = iblockdata.getMaterial();
if (iblockdata.isAir()) {
--
2.18.0
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