diff --git a/src/pocketmine/command/defaults/SetWorldSpawnCommand.php b/src/pocketmine/command/defaults/SetWorldSpawnCommand.php
index d65b45fbe..462735857 100644
--- a/src/pocketmine/command/defaults/SetWorldSpawnCommand.php
+++ b/src/pocketmine/command/defaults/SetWorldSpawnCommand.php
@@ -46,7 +46,8 @@ class SetWorldSpawnCommand extends VanillaCommand{
 		if(count($args) === 0){
 			if($sender instanceof Player){
 				$level = $sender->getLevel();
-				$pos = Vector3::cloneVector($sender)->round();
+				$pos = Vector3::cloneVector($sender);
+				$pos = $pos->round();
 			}else{
 				$sender->sendMessage(TextFormat::RED . "You can only perform this command as a player");
 
diff --git a/src/pocketmine/entity/Entity.php b/src/pocketmine/entity/Entity.php
index 92dbcd320..68df97f32 100644
--- a/src/pocketmine/entity/Entity.php
+++ b/src/pocketmine/entity/Entity.php
@@ -776,7 +776,8 @@ abstract class Entity extends Location implements Metadatable{
 	}
 
 	public function isInsideOfWater(){
-		$block = $this->level->getBlock(Vector3::createVector($this->x, $y = ($this->y + $this->getEyeHeight()), $this->z)->floor());
+		$pos = Vector3::createVector($this->x, $y = ($this->y + $this->getEyeHeight()), $this->z);
+		$block = $this->level->getBlock($pos->floor());
 
 		if($block instanceof Water){
 			$f = ($block->y + 1) - ($block->getFluidHeightPercent() - 0.1111111);
@@ -787,7 +788,8 @@ abstract class Entity extends Location implements Metadatable{
 	}
 
 	public function isInsideOfSolid(){
-		$block = $this->level->getBlock(Vector3::createVector($this->x, $y = ($this->y + $this->getEyeHeight()), $this->z)->floor());
+		$pos = Vector3::createVector($this->x, $y = ($this->y + $this->getEyeHeight()), $this->z);
+		$block = $this->level->getBlock($pos->floor());
 
 		$bb = $block->getBoundingBox();
 
diff --git a/src/pocketmine/entity/FallingSand.php b/src/pocketmine/entity/FallingSand.php
index b73464793..857339816 100644
--- a/src/pocketmine/entity/FallingSand.php
+++ b/src/pocketmine/entity/FallingSand.php
@@ -90,7 +90,8 @@ class FallingSand extends Entity{
 
 		if(!$this->dead){
 			if($this->ticksLived === 1){
-				$block = $this->level->getBlock($pos = Vector3::cloneVector($this)->floor());
+				$pos = Vector3::cloneVector($this);
+				$block = $this->level->getBlock($pos->floor());
 				if($block->getID() != $this->blockId){
 					$this->kill();
 					return true;
@@ -109,7 +110,8 @@ class FallingSand extends Entity{
 			$this->motionY *= 1 - $this->drag;
 			$this->motionZ *= $friction;
 
-			$pos = Vector3::cloneVector($this)->floor();
+			$pos = Vector3::cloneVector($this);
+			$pos = $pos->floor();
 
 			if($this->onGround){
 				$this->kill();
diff --git a/src/pocketmine/level/Explosion.php b/src/pocketmine/level/Explosion.php
index 3a5632a28..f3a34c923 100644
--- a/src/pocketmine/level/Explosion.php
+++ b/src/pocketmine/level/Explosion.php
@@ -130,7 +130,8 @@ class Explosion{
 
 	public function explodeB(){
 		$send = [];
-		$source = Vector3::cloneVector($this->source)->floor();
+		$source = Vector3::cloneVector($this->source);
+		$source = $source->floor();
 		$yield = (1 / $this->size) * 100;
 
 		if($this->what instanceof Entity){
diff --git a/src/pocketmine/level/Level.php b/src/pocketmine/level/Level.php
index ac85f4652..576266bad 100644
--- a/src/pocketmine/level/Level.php
+++ b/src/pocketmine/level/Level.php
@@ -95,6 +95,7 @@ use pocketmine\utils\LevelException;
 use pocketmine\utils\ReversePriorityQueue;
 use pocketmine\utils\TextFormat;
 
+#include <rules/Level.h>
 
 class Level implements ChunkManager, Metadatable{
 
diff --git a/src/pocketmine/math/Vector3.php b/src/pocketmine/math/Vector3.php
index 3384c5bc5..b79091930 100644
--- a/src/pocketmine/math/Vector3.php
+++ b/src/pocketmine/math/Vector3.php
@@ -24,8 +24,8 @@ namespace pocketmine\math;
 class Vector3{
 
 	/** @var Vector3[] */
-	private static $vectorList = [];
-	private static $nextVector = 0;
+	public static $vectorList = [];
+	public static $nextVector = 0;
 
 	const SIDE_DOWN = 0;
 	const SIDE_UP = 1;
@@ -45,15 +45,15 @@ class Vector3{
 	}
 
 	public static function clearVectors(){
-		self::$nextVector = 0;
-		self::$vectorList = [];
+		Vector3::$nextVector = 0;
+		Vector3::$vectorList = [];
 	}
 
 	public static function clearVectorList(){
-		if(self::$nextVector > 65536){
-			self::clearVectors();
+		if(Vector3::$nextVector > 65536){
+			Vector3::clearVectors();
 		}else{
-			self::$nextVector = 0;
+			Vector3::$nextVector = 0;
 		}
 	}
 
@@ -65,11 +65,11 @@ class Vector3{
 	 * @return Vector3
 	 */
 	public static function createVector($x, $y, $z){
-		if(self::$nextVector >= count(self::$vectorList)){
-			self::$vectorList[] = new Vector3(0, 0, 0);
+		if(Vector3::$nextVector >= count(Vector3::$vectorList)){
+			Vector3::$vectorList[] = new Vector3(0, 0, 0);
 		}
 
-		return self::$vectorList[self::$nextVector++]->setComponents($x, $y, $z);
+		return Vector3::$vectorList[Vector3::$nextVector++]->setComponents($x, $y, $z);
 	}
 
 	/**
@@ -78,11 +78,11 @@ class Vector3{
 	 * @return Vector3
 	 */
 	public static function cloneVector(Vector3 $vector){
-		if(self::$nextVector >= count(self::$vectorList)){
-			self::$vectorList[] = new Vector3(0, 0, 0);
+		if(Vector3::$nextVector >= count(Vector3::$vectorList)){
+			Vector3::$vectorList[] = new Vector3(0, 0, 0);
 		}
 
-		return self::$vectorList[self::$nextVector++]->setComponents($vector->x, $vector->y, $vector->z);
+		return Vector3::$vectorList[Vector3::$nextVector++]->setComponents($vector->x, $vector->y, $vector->z);
 	}
 
 	public function getX(){
@@ -138,9 +138,9 @@ class Vector3{
 	 */
 	public function add($x, $y = 0, $z = 0){
 		if($x instanceof Vector3){
-			return self::createVector($this->x + $x->x, $this->y + $x->y, $this->z + $x->z);
+			return Vector3::createVector($this->x + $x->x, $this->y + $x->y, $this->z + $x->z);
 		}else{
-			return self::createVector($this->x + $x, $this->y + $y, $this->z + $z);
+			return Vector3::createVector($this->x + $x, $this->y + $y, $this->z + $z);
 		}
 	}
 
@@ -160,46 +160,46 @@ class Vector3{
 	}
 
 	public function multiply($number){
-		return self::createVector($this->x * $number, $this->y * $number, $this->z * $number);
+		return Vector3::createVector($this->x * $number, $this->y * $number, $this->z * $number);
 	}
 
 	public function divide($number){
-		return self::createVector($this->x / $number, $this->y / $number, $this->z / $number);
+		return Vector3::createVector($this->x / $number, $this->y / $number, $this->z / $number);
 	}
 
 	public function ceil(){
-		return self::createVector((int) ($this->x + 1), (int) ($this->y + 1), (int) ($this->z + 1));
+		return Vector3::createVector((int) ($this->x + 1), (int) ($this->y + 1), (int) ($this->z + 1));
 	}
 
 	public function floor(){
 		$x = (int) $this->x;
 		$y = (int) $this->y;
 		$z = (int) $this->z;
-		return new Vector3($this->x >= $x ? $x : $x - 1, $this->y >= $y ? $y : $y - 1, $this->z >= $z ? $z : $z - 1);
+		return Vector3::createVector($this->x >= $x ? $x : $x - 1, $this->y >= $y ? $y : $y - 1, $this->z >= $z ? $z : $z - 1);
 	}
 
 	public function round(){
-		return new Vector3(round($this->x), round($this->y), round($this->z));
+		return Vector3::createVector(round($this->x), round($this->y), round($this->z));
 	}
 
 	public function abs(){
-		return new Vector3(abs($this->x), abs($this->y), abs($this->z));
+		return Vector3::createVector(abs($this->x), abs($this->y), abs($this->z));
 	}
 
 	public function getSide($side, $step = 1){
 		switch((int) $side){
-			case self::SIDE_DOWN:
-				return self::createVector($this->x, $this->y - $step, $this->z);
-			case self::SIDE_UP:
-				return self::createVector($this->x, $this->y + $step, $this->z);
-			case self::SIDE_NORTH:
-				return self::createVector($this->x, $this->y, $this->z - $step);
-			case self::SIDE_SOUTH:
-				return self::createVector($this->x, $this->y, $this->z + $step);
-			case self::SIDE_WEST:
-				return self::createVector($this->x - $step, $this->y, $this->z);
-			case self::SIDE_EAST:
-				return self::createVector($this->x + $step, $this->y, $this->z);
+			case Vector3::SIDE_DOWN:
+				return Vector3::createVector($this->x, $this->y - $step, $this->z);
+			case Vector3::SIDE_UP:
+				return Vector3::createVector($this->x, $this->y + $step, $this->z);
+			case Vector3::SIDE_NORTH:
+				return Vector3::createVector($this->x, $this->y, $this->z - $step);
+			case Vector3::SIDE_SOUTH:
+				return Vector3::createVector($this->x, $this->y, $this->z + $step);
+			case Vector3::SIDE_WEST:
+				return Vector3::createVector($this->x - $step, $this->y, $this->z);
+			case Vector3::SIDE_EAST:
+				return Vector3::createVector($this->x + $step, $this->y, $this->z);
 			default:
 				return $this;
 		}
@@ -207,18 +207,18 @@ class Vector3{
 
 	public static function getOppositeSide($side){
 		switch((int) $side){
-			case self::SIDE_DOWN:
-				return self::SIDE_UP;
-			case self::SIDE_UP:
-				return self::SIDE_DOWN;
-			case self::SIDE_NORTH:
-				return self::SIDE_SOUTH;
-			case self::SIDE_SOUTH:
-				return self::SIDE_NORTH;
-			case self::SIDE_WEST:
-				return self::SIDE_EAST;
-			case self::SIDE_EAST:
-				return self::SIDE_WEST;
+			case Vector3::SIDE_DOWN:
+				return Vector3::SIDE_UP;
+			case Vector3::SIDE_UP:
+				return Vector3::SIDE_DOWN;
+			case Vector3::SIDE_NORTH:
+				return Vector3::SIDE_SOUTH;
+			case Vector3::SIDE_SOUTH:
+				return Vector3::SIDE_NORTH;
+			case Vector3::SIDE_WEST:
+				return Vector3::SIDE_EAST;
+			case Vector3::SIDE_EAST:
+				return Vector3::SIDE_WEST;
 			default:
 				return -1;
 		}
@@ -259,7 +259,7 @@ class Vector3{
 			return $this->divide($len);
 		}
 
-		return self::createVector(0, 0, 0);
+		return Vector3::createVector(0, 0, 0);
 	}
 
 	public function dot(Vector3 $v){
@@ -267,7 +267,7 @@ class Vector3{
 	}
 
 	public function cross(Vector3 $v){
-		return self::createVector(
+		return Vector3::createVector(
 			$this->y * $v->z - $this->z * $v->y,
 			$this->z * $v->x - $this->x * $v->z,
 			$this->x * $v->y - $this->y * $v->x
@@ -297,7 +297,7 @@ class Vector3{
 		if($f < 0 or $f > 1){
 			return null;
 		}else{
-			return self::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
+			return Vector3::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
 		}
 	}
 
@@ -324,7 +324,7 @@ class Vector3{
 		if($f < 0 or $f > 1){
 			return null;
 		}else{
-			return self::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
+			return Vector3::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
 		}
 	}
 
@@ -351,7 +351,7 @@ class Vector3{
 		if($f < 0 or $f > 1){
 			return null;
 		}else{
-			return self::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
+			return Vector3::createVector($this->x + $xDiff * $f, $this->y + $yDiff * $f, $this->z + $zDiff * $f);
 		}
 	}
 
diff --git a/src/pocketmine/utils/BlockIterator.php b/src/pocketmine/utils/BlockIterator.php
index aec0705ce..402e40a48 100644
--- a/src/pocketmine/utils/BlockIterator.php
+++ b/src/pocketmine/utils/BlockIterator.php
@@ -71,7 +71,8 @@ class BlockIterator implements \Iterator{
 		$secondPosition = 0;
 		$thirdPosition = 0;
 
-		$startBlock = $this->level->getBlock(Vector3::createVector($startClone->x, $startClone->y, $startClone->z)->floor());
+		$pos = Vector3::createVector($startClone->x, $startClone->y, $startClone->z);
+		$startBlock = $this->level->getBlock($pos->floor());
 
 		if($this->getXLength($direction) > $mainDirection){
 			$this->mainFace = $this->getXFace($direction);