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Implemented Totems, close #2198

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Totem usage can be detected using the MODIFIER_TOTEM constant of EntityDamageEvent.

This does not currently support using the totem in the offhand because offhand is not implemented yet.
This commit is contained in:
Dylan K. Taylor 2018-05-23 10:05:01 +01:00
parent 1c4dd4f280
commit acf29711c2
4 changed files with 73 additions and 1 deletions
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37
src/pocketmine/entity/Human.php
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@ -35,6 +35,7 @@ use pocketmine\inventory\PlayerInventory;
use pocketmine\item\Consumable;
use pocketmine\item\FoodSource;
use pocketmine\item\Item;
use pocketmine\item\Totem;
use pocketmine\level\Level;
use pocketmine\nbt\NBT;
use pocketmine\nbt\tag\ByteArrayTag;
@ -43,6 +44,7 @@ use pocketmine\nbt\tag\IntTag;
use pocketmine\nbt\tag\ListTag;
use pocketmine\nbt\tag\StringTag;
use pocketmine\network\mcpe\protocol\AddPlayerPacket;
use pocketmine\network\mcpe\protocol\EntityEventPacket;
use pocketmine\network\mcpe\protocol\LevelEventPacket;
use pocketmine\network\mcpe\protocol\LevelSoundEventPacket;
use pocketmine\network\mcpe\protocol\PlayerSkinPacket;
@ -673,6 +675,41 @@ class Human extends Creature implements ProjectileSource, InventoryHolder{
return $this->getNameTag();
}
public function applyDamageModifiers(EntityDamageEvent $source) : void{
parent::applyDamageModifiers($source);
$type = $source->getCause();
if($type !== EntityDamageEvent::CAUSE_SUICIDE and $type !== EntityDamageEvent::CAUSE_VOID
and $this->inventory->getItemInHand() instanceof Totem){ //TODO: check offhand as well (when it's implemented)
$compensation = $this->getHealth() - $source->getFinalDamage() - 1;
if($compensation < 0){
$source->setModifier($compensation, EntityDamageEvent::MODIFIER_TOTEM);
}
}
}
protected function applyPostDamageEffects(EntityDamageEvent $source) : void{
parent::applyPostDamageEffects($source);
$totemModifier = $source->getModifier(EntityDamageEvent::MODIFIER_TOTEM);
if($totemModifier < 0){ //Totem prevented death
$this->removeAllEffects();
$this->addEffect(new EffectInstance(Effect::getEffect(Effect::REGENERATION), 40 * 20, 1));
$this->addEffect(new EffectInstance(Effect::getEffect(Effect::FIRE_RESISTANCE), 40 * 20, 1));
$this->addEffect(new EffectInstance(Effect::getEffect(Effect::ABSORPTION), 5 * 20, 1));
$this->broadcastEntityEvent(EntityEventPacket::CONSUME_TOTEM);
$this->level->broadcastLevelEvent($this->add(0, $this->eyeHeight, 0), LevelEventPacket::EVENT_SOUND_TOTEM);
$hand = $this->inventory->getItemInHand();
if($hand instanceof Totem){
$hand->pop(); //Plugins could alter max stack size
$this->inventory->setItemInHand($hand);
}
}
}
public function getDrops() : array{
return array_merge(
$this->inventory !== null ? array_values($this->inventory->getContents()) : [],

1
src/pocketmine/event/entity/EntityDamageEvent.php
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@ -37,6 +37,7 @@ class EntityDamageEvent extends EntityEvent implements Cancellable{
public const MODIFIER_ABSORPTION = 5;
public const MODIFIER_ARMOR_ENCHANTMENTS = 6;
public const MODIFIER_CRITICAL = 7;
public const MODIFIER_TOTEM = 8;
public const CAUSE_CONTACT = 0;
public const CAUSE_ENTITY_ATTACK = 1;

2
src/pocketmine/item/ItemFactory.php
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@ -228,7 +228,7 @@ class ItemFactory{
self::registerItem(new Item(Item::SHULKER_SHELL, 0, "Shulker Shell"));
self::registerItem(new Banner());
//TODO: TOTEM
self::registerItem(new Totem());
self::registerItem(new Item(Item::IRON_NUGGET, 0, "Iron Nugget"));

34
src/pocketmine/item/Totem.php Normal file
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@ -0,0 +1,34 @@
<?php
/*
*
* ____ _ _ __ __ _ __ __ ____
* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* @author PocketMine Team
* @link http://www.pocketmine.net/
*
*
*/
declare(strict_types=1);
namespace pocketmine\item;
class Totem extends Item{
public function __construct(int $meta = 0){
parent::__construct(self::TOTEM, $meta, "Totem of Undying");
}
public function getMaxStackSize() : int{
return 1;
}
}