From 188f4d77784dfa8fc3c444b2991bc718fb9f2da0 Mon Sep 17 00:00:00 2001
From: Shoghi Cervantes <shoghicp@gmail.com>
Date: Thu, 4 Jun 2015 17:36:06 +0200
Subject: [PATCH] Clear chunk cache on tile change

---
 src/pocketmine/level/Level.php | 6 ++++++
 src/pocketmine/tile/Sign.php   | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index df3a88656..987e45a9a 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -800,6 +800,10 @@ class Level implements ChunkManager, Metadatable{
 
 	}
 
+	public function clearChunkCache($chunkX, $chunkZ){
+		unset($this->chunkCache[Level::chunkHash($chunkX, $chunkZ)]);
+	}
+
 	private function tickChunks(){
 		if($this->chunksPerTick <= 0 or count($this->players) === 0){
 			$this->chunkTickList = [];
@@ -2271,6 +2275,7 @@ class Level implements ChunkManager, Metadatable{
 			throw new LevelException("Invalid Tile level");
 		}
 		$this->tiles[$tile->getId()] = $tile;
+		$this->clearChunkCache($tile->getX() >> 4, $tile->getZ() >> 4);
 	}
 
 	/**
@@ -2285,6 +2290,7 @@ class Level implements ChunkManager, Metadatable{
 
 		unset($this->tiles[$tile->getId()]);
 		unset($this->updateTiles[$tile->getId()]);
+		$this->clearChunkCache($tile->getX() >> 4, $tile->getZ() >> 4);
 	}
 
 	/**
diff --git a/src/pocketmine/tile/Sign.php b/src/pocketmine/tile/Sign.php
index bb23599d8..94cab70b1 100644
--- a/src/pocketmine/tile/Sign.php
+++ b/src/pocketmine/tile/Sign.php
@@ -57,6 +57,11 @@ class Sign extends Spawnable{
 		$this->namedtag->Text4 = new String("Text4", $line4);
 		$this->spawnToAll();
 
+		if($this->chunk){
+			$this->chunk->setChanged();
+			$this->level->clearChunkCache($this->chunk->getX(), $this->chunk->getZ());
+		}
+
 		return true;
 	}