From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 31 Mar 2016 19:17:58 -0400
Subject: [PATCH] Do not load chunks for Pathfinding


diff --git a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
+++ b/src/main/java/net/minecraft/world/entity/ai/navigation/PathNavigation.java
@@ -0,0 +0,0 @@ public abstract class PathNavigation {
     private BlockPos targetPos;
     private int reachRange;
     private float maxVisitedNodesMultiplier = 1.0F;
-    private final PathFinder pathFinder;
+    private final PathFinder pathFinder; @Deprecated public PathFinder getPathfinder() { return this.pathFinder; } // Paper - OBFHELPER
     private boolean isStuck;
 
     public PathNavigation(Mob mob, Level world) {
diff --git a/src/main/java/net/minecraft/world/level/pathfinder/PathFinder.java b/src/main/java/net/minecraft/world/level/pathfinder/PathFinder.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/pathfinder/PathFinder.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/PathFinder.java
@@ -0,0 +0,0 @@ public class PathFinder {
     private static final float FUDGING = 1.5F;
     private final Node[] neighbors = new Node[32];
     private final int maxVisitedNodes;
-    private final NodeEvaluator nodeEvaluator;
+    private final NodeEvaluator nodeEvaluator; @Deprecated public NodeEvaluator getPathfinder() { return this.nodeEvaluator; }  // Paper - OBFHELPER
     private static final boolean DEBUG = false;
     private final BinaryHeap openSet = new BinaryHeap();
 
diff --git a/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java b/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
--- a/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
+++ b/src/main/java/net/minecraft/world/level/pathfinder/WalkNodeEvaluator.java
@@ -0,0 +0,0 @@ public class WalkNodeEvaluator extends NodeEvaluator {
                 for(int n = -1; n <= 1; ++n) {
                     if (l != 0 || n != 0) {
                         pos.set(i + l, j + m, k + n);
-                        BlockState blockState = world.getBlockState(pos);
+                        // Paper start
+                        BlockState blockState = world.getTypeIfLoaded(pos);
+                        if (blockState == null) {
+                            return BlockPathTypes.BLOCKED;
+                        } else {
+                        // Paper end
                         if (blockState.is(Blocks.CACTUS)) {
                             return BlockPathTypes.DANGER_CACTUS;
                         }
@@ -0,0 +0,0 @@ public class WalkNodeEvaluator extends NodeEvaluator {
                         if (world.getFluidState(pos).is(FluidTags.WATER)) {
                             return BlockPathTypes.WATER_BORDER;
                         }
+                        } // Paper
                     }
                 }
             }
@@ -0,0 +0,0 @@ public class WalkNodeEvaluator extends NodeEvaluator {
     }
 
     protected static BlockPathTypes getBlockPathTypeRaw(BlockGetter world, BlockPos pos) {
-        BlockState blockState = world.getBlockState(pos);
+        BlockState blockState = world.getTypeIfLoaded(pos); // Paper
+        if (blockState == null) return BlockPathTypes.BLOCKED; // Paper
         Block block = blockState.getBlock();
         Material material = blockState.getMaterial();
         if (blockState.isAir()) {