From 21f5be27b6c9ee351cb7a91b9773dd358496954e Mon Sep 17 00:00:00 2001
From: "Dylan K. Taylor" <odigiman@gmail.com>
Date: Tue, 13 Dec 2016 12:03:24 +0000
Subject: [PATCH] Added options and API to enable/disable random ticking for
 specific block IDs

---
 src/pocketmine/level/Level.php          | 15 +++++++++++++++
 src/pocketmine/resources/pocketmine.yml |  3 +++
 2 files changed, 18 insertions(+)

diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index cd38f40ea..29002aa36 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -346,6 +346,13 @@ class Level implements ChunkManager, Metadatable{
 		$this->clearChunksOnTick = (bool) $this->server->getProperty("chunk-ticking.clear-tick-list", true);
 		$this->cacheChunks = (bool) $this->server->getProperty("chunk-sending.cache-chunks", false);
 
+		$dontTickBlocks = $this->server->getProperty("chunk-ticking.disable-block-ticking", []);
+		foreach($dontTickBlocks as $id){
+			if(isset($this->randomTickBlocks[$id])){
+				unset($this->randomTickBlocks[$id]);
+			}
+		}
+
 		$this->timings = new LevelTimings($this);
 		$this->temporalPosition = new Position(0, 0, 0, $this);
 		$this->temporalVector = new Vector3(0, 0, 0);
@@ -877,6 +884,14 @@ class Level implements ChunkManager, Metadatable{
 		unset($this->chunkCache[Level::chunkHash($chunkX, $chunkZ)]);
 	}
 
+	public function addRandomTickedBlock(int $id){
+		$this->randomTickBlocks[$id] = Block::$list[$id];
+	}
+
+	public function removeRandomTickedBlock(int $id){
+		unset($this->randomTickBlocks[$id]);
+	}
+
 	private function tickChunks(){
 		if($this->chunksPerTick <= 0 or count($this->loaders) === 0){
 			$this->chunkTickList = [];
diff --git a/src/pocketmine/resources/pocketmine.yml b/src/pocketmine/resources/pocketmine.yml
index 442258b5c..27185f79e 100644
--- a/src/pocketmine/resources/pocketmine.yml
+++ b/src/pocketmine/resources/pocketmine.yml
@@ -131,6 +131,9 @@ chunk-ticking:
  tick-radius: 3
  light-updates: false
  clear-tick-list: true
+ #IDs of blocks not to perform random ticking on.
+ disable-block-ticking:
+  #- 2 # grass
 
 chunk-generation:
  #Max. amount of chunks in the waiting queue to be generated