Paper/Spigot-Server-Patches/0077-Do-not-load-chunks-for-Pathfinding.patch

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/server/NavigationAbstract.java b/src/main/java/net/minecraft/server/NavigationAbstract.java
index 8c51ab85ed4ef23f049fcbfac93e39ab739194cf..35de4e5be6bc0f3660ec795e41fa71d622662987 100644
--- a/src/main/java/net/minecraft/server/NavigationAbstract.java
+++ b/src/main/java/net/minecraft/server/NavigationAbstract.java
@@ -27,7 +27,7 @@ public abstract class NavigationAbstract {
     private BlockPosition p;
     private int q;
     private float r;
-    private final Pathfinder s;
+    private final Pathfinder s; public Pathfinder getPathfinder() { return this.s; } // Paper - OBFHELPER
 
     public NavigationAbstract(EntityInsentient entityinsentient, World world) {
         this.g = Vec3D.a;
diff --git a/src/main/java/net/minecraft/server/Pathfinder.java b/src/main/java/net/minecraft/server/Pathfinder.java
index 8ba6dd459a863717c91dd59f3f2ee5e3a5ed8170..b31d1f73ce0f067e352868b53eab7557c34b17eb 100644
--- a/src/main/java/net/minecraft/server/Pathfinder.java
+++ b/src/main/java/net/minecraft/server/Pathfinder.java
@@ -17,7 +17,7 @@ public class Pathfinder {
 
     private final PathPoint[] a = new PathPoint[32];
     private final int b;
-    private final PathfinderAbstract c;
+    private final PathfinderAbstract c; public PathfinderAbstract getPathfinder() { return this.c; }  // Paper - OBFHELPER
     private final Path d = new Path();
 
     public Pathfinder(PathfinderAbstract pathfinderabstract, int i) {
diff --git a/src/main/java/net/minecraft/server/PathfinderNormal.java b/src/main/java/net/minecraft/server/PathfinderNormal.java
index 40fd404fd3d7715efb1eeee4f1715acc2368c577..a0555b132d6ddd2c6c259ae569e411606e496d1d 100644
--- a/src/main/java/net/minecraft/server/PathfinderNormal.java
+++ b/src/main/java/net/minecraft/server/PathfinderNormal.java
@@ -456,7 +456,12 @@ public class PathfinderNormal extends PathfinderAbstract {
                 for (int j1 = -1; j1 <= 1; ++j1) {
                     if (l != 0 || j1 != 0) {
                         blockposition_mutableblockposition.d(i + l, j + i1, k + j1);
-                        IBlockData iblockdata = iblockaccess.getType(blockposition_mutableblockposition);
+                        // Paper start
+                        IBlockData iblockdata = iblockaccess.getTypeIfLoaded(blockposition_mutableblockposition);
+                        if (iblockdata == null) {
+                            pathtype = PathType.BLOCKED;
+                        } else {
+                        // Paper end
 
                         if (iblockdata.a(Blocks.CACTUS)) {
                             return PathType.DANGER_CACTUS;
@@ -473,6 +478,7 @@ public class PathfinderNormal extends PathfinderAbstract {
                         if (iblockaccess.getFluid(blockposition_mutableblockposition).a((Tag) TagsFluid.WATER)) {
                             return PathType.WATER_BORDER;
                         }
+                        } // Paper
                     }
                 }
             }
@@ -482,7 +488,8 @@ public class PathfinderNormal extends PathfinderAbstract {
     }
 
     protected static PathType b(IBlockAccess iblockaccess, BlockPosition blockposition) {
-        IBlockData iblockdata = iblockaccess.getType(blockposition);
+        IBlockData iblockdata = iblockaccess.getTypeIfLoaded(blockposition); // Paper
+        if (iblockdata == null) return PathType.BLOCKED; // Paper
         Block block = iblockdata.getBlock();
         Material material = iblockdata.getMaterial();