Added Snowballs

src/pocketmine/entity/Projectile.php

@@ -22,6 +22,162 @@
 namespace pocketmine\entity;
 
 
+use pocketmine\event\entity\EntityCombustByEntityEvent;
+use pocketmine\event\entity\EntityDamageByEntityEvent;
+use pocketmine\event\entity\EntityDamageEvent;
+use pocketmine\event\entity\EntityRegainHealthEvent;
+use pocketmine\event\entity\ProjectileHitEvent;
+use pocketmine\level\MovingObjectPosition;
+use pocketmine\math\Vector3;
+use pocketmine\nbt\tag\Short;
+
 abstract class Projectile extends Entity{
+	/** @var Entity */
+	public $shootingEntity = null;
+	protected $damage = 0;
+
+	protected function initEntity(){
+		$this->setMaxHealth(1);
+		$this->setHealth(1);
+		if(isset($this->namedtag->Age)){
+			$this->age = $this->namedtag["Age"];
+		}
+
+	}
+
+	public function canCollideWith(Entity $entity){
+		return $entity instanceof Living and !$this->onGround;
+	}
+
+	public function getData(){
+		$flags = 0;
+		$flags |= $this->fireTicks > 0 ? 1 : 0;
+
+		return [
+			0 => ["type" => 0, "value" => $flags],
+			1 => ["type" => 1, "value" => $this->airTicks],
+			16 => ["type" => 0, "value" => 0] //Is critical
+		];
+	}
+
+	public function saveNBT(){
+		parent::saveNBT();
+		$this->namedtag->Age = new Short("Age", $this->age);
+	}
+
+	public function attack($damage, $source = EntityDamageEvent::CAUSE_MAGIC){
+
+	}
+
+	public function heal($amount, $source = EntityRegainHealthEvent::CAUSE_MAGIC){
+
+	}
+
+	public function onUpdate($currentTick){
+		if($this->closed){
+			return false;
+		}
+
+
+
+		$tickDiff = max(1, $currentTick - $this->lastUpdate);
+		$this->lastUpdate = $currentTick;
+
+		$hasUpdate = $this->entityBaseTick($tickDiff);
+
+		if(!$this->dead){
+
+			$movingObjectPosition = null;
+
+			$this->motionY -= $this->gravity;
+
+			$this->keepMovement = $this->checkObstruction($this->x, ($this->boundingBox->minY + $this->boundingBox->maxY) / 2, $this->z);
+
+			$moveVector = Vector3::createVector($this->x + $this->motionX, $this->y + $this->motionY, $this->z + $this->motionZ);
+
+			$list = $this->getLevel()->getCollidingEntities($this->boundingBox->addCoord($this->motionX, $this->motionY, $this->motionZ)->expand(1, 1, 1), $this);
+
+			$nearDistance = PHP_INT_MAX;
+			$nearEntity = null;
+
+			foreach($list as $entity){
+				if(/*!$entity->canCollideWith($this) or */
+				($entity === $this->shootingEntity and $this->ticksLived < 5)
+				){
+					continue;
+				}
+
+				$axisalignedbb = $entity->boundingBox->grow(0.3, 0.3, 0.3);
+				$ob = $axisalignedbb->calculateIntercept($this, $moveVector);
+
+				if($ob === null){
+					continue;
+				}
+
+				$distance = $this->distance($ob->hitVector);
+
+				if($distance < $nearDistance){
+					$nearDistance = $distance;
+					$nearEntity = $entity;
+				}
+			}
+
+			if($nearEntity !== null){
+				$movingObjectPosition = MovingObjectPosition::fromEntity($nearEntity);
+			}
+
+			if($movingObjectPosition !== null){
+				if($movingObjectPosition->entityHit !== null){
+
+					$this->server->getPluginManager()->callEvent(ProjectileHitEvent::createEvent($this));
+
+					$motion = sqrt($this->motionX ** 2 + $this->motionY ** 2 + $this->motionZ ** 2);
+					$damage = ceil($motion * $this->damage);
+
+
+					$ev = EntityDamageByEntityEvent::createEvent($this->shootingEntity === null ? $this : $this->shootingEntity, $movingObjectPosition->entityHit, EntityDamageEvent::CAUSE_PROJECTILE, $damage);
+
+					$this->server->getPluginManager()->callEvent($ev);
+
+					if(!$ev->isCancelled()){
+						$movingObjectPosition->entityHit->attack($ev->getFinalDamage(), $ev);
+					}
+
+					if($this->fireTicks > 0){
+						$ev = EntityCombustByEntityEvent::createEvent($this, $movingObjectPosition->entityHit, 5);
+						$this->server->getPluginManager()->callEvent($ev);
+						if(!$ev->isCancelled()){
+							$movingObjectPosition->entityHit->setOnFire($ev->getDuration());
+						}
+					}
+
+					$this->kill();
+					return true;
+				}
+			}
+
+			$this->move($this->motionX, $this->motionY, $this->motionZ);
+
+			if($this->onGround and ($this->motionX != 0 or $this->motionY != 0 or $this->motionZ != 0)){
+				$this->motionX = 0;
+				$this->motionY = 0;
+				$this->motionZ = 0;
+
+				$this->server->getPluginManager()->callEvent(ProjectileHitEvent::createEvent($this));
+			}
+
+			if(!$this->onGround or $this->motionX != 0 or $this->motionY != 0 or $this->motionZ != 0){
+				$f = sqrt(($this->motionX ** 2) + ($this->motionZ ** 2));
+				$this->yaw = (atan2($this->motionX, $this->motionZ) * 180 / M_PI);
+				$this->pitch = (atan2($this->motionY, $f) * 180 / M_PI);
+				$hasUpdate = true;
+			}
+
+			$this->updateMovement();
+
+		}
+
+		return $hasUpdate;
+	}
 
 }