Painting.php

<?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\entity\object;
 
use pocketmine\block\VanillaBlocks;
use pocketmine\entity\Entity;
use pocketmine\entity\EntitySizeInfo;
use pocketmine\entity\Location;
use pocketmine\event\entity\EntityDamageByEntityEvent;
use pocketmine\item\Item;
use pocketmine\item\VanillaItems;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\nbt\tag\CompoundTag;
use pocketmine\network\mcpe\protocol\AddPaintingPacket;
use pocketmine\network\mcpe\protocol\types\entity\EntityIds;
use pocketmine\player\Player;
use pocketmine\world\particle\BlockBreakParticle;
use pocketmine\world\World;
use function ceil;
 
class Painting extends Entity{
    public const TAG_TILE_X = "TileX"; //TAG_Int
    public const TAG_TILE_Y = "TileY"; //TAG_Int
    public const TAG_TILE_Z = "TileZ"; //TAG_Int
    public const TAG_FACING_JE = "Facing"; //TAG_Byte
    public const TAG_DIRECTION_BE = "Direction"; //TAG_Byte
    public const TAG_MOTIVE = "Motive"; //TAG_String
 
    public function getNetworkTypeId() : string{ return EntityIds::PAINTING; }
 
    public const DATA_TO_FACING = [
        0 => Facing::SOUTH,
        1 => Facing::WEST,
        2 => Facing::NORTH,
        3 => Facing::EAST
    ];
    private const FACING_TO_DATA = [
        Facing::SOUTH => 0,
        Facing::WEST => 1,
        Facing::NORTH => 2,
        Facing::EAST => 3
    ];
 
    protected Vector3 $blockIn;
    protected int $facing;
    protected PaintingMotive $motive;
 
    public function __construct(Location $location, Vector3 $blockIn, int $facing, PaintingMotive $motive, ?CompoundTag $nbt = null){
        $this->motive = $motive;
        $this->blockIn = $blockIn->asVector3();
        $this->facing = $facing;
        parent::__construct($location, $nbt);
    }
 
    protected function getInitialSizeInfo() : EntitySizeInfo{
        //these aren't accurate, but it doesn't matter since they aren't used (vanilla PC does something similar)
        return new EntitySizeInfo(0.5, 0.5);
    }
 
    protected function getInitialDragMultiplier() : float{ return 1.0; }
 
    protected function getInitialGravity() : float{ return 0.0; }
 
    protected function initEntity(CompoundTag $nbt) : void{
        $this->setMaxHealth(1);
        $this->setHealth(1);
        parent::initEntity($nbt);
    }
 
    public function saveNBT() : CompoundTag{
        $nbt = parent::saveNBT();
        $nbt->setInt(self::TAG_TILE_X, (int) $this->blockIn->x);
        $nbt->setInt(self::TAG_TILE_Y, (int) $this->blockIn->y);
        $nbt->setInt(self::TAG_TILE_Z, (int) $this->blockIn->z);
 
        $nbt->setByte(self::TAG_FACING_JE, self::FACING_TO_DATA[$this->facing]);
        $nbt->setByte(self::TAG_DIRECTION_BE, self::FACING_TO_DATA[$this->facing]); //Save both for full compatibility
 
        $nbt->setString(self::TAG_MOTIVE, $this->motive->getName());
 
        return $nbt;
    }
 
    protected function onDeath() : void{
        parent::onDeath();
 
        $drops = true;
 
        if($this->lastDamageCause instanceof EntityDamageByEntityEvent){
            $killer = $this->lastDamageCause->getDamager();
            if($killer instanceof Player && !$killer->hasFiniteResources()){
                $drops = false;
            }
        }
 
        if($drops){
            //non-living entities don't have a way to create drops generically yet
            $this->getWorld()->dropItem($this->location, VanillaItems::PAINTING());
        }
        $this->getWorld()->addParticle($this->location->add(0.5, 0.5, 0.5), new BlockBreakParticle(VanillaBlocks::OAK_PLANKS()));
    }
 
    protected function recalculateBoundingBox() : void{
        $side = $this->blockIn->getSide($this->facing);
        $this->boundingBox = self::getPaintingBB($this->facing, $this->getMotive())->offset($side->x, $side->y, $side->z);
    }
 
    public function onNearbyBlockChange() : void{
        parent::onNearbyBlockChange();
 
        if(!self::canFit($this->getWorld(), $this->blockIn->getSide($this->facing), $this->facing, false, $this->getMotive())){
            $this->kill();
        }
    }
 
    public function onRandomUpdate() : void{
        //NOOP
    }
 
    public function hasMovementUpdate() : bool{
        return false;
    }
 
    protected function updateMovement(bool $teleport = false) : void{
 
    }
 
    public function canBeCollidedWith() : bool{
        return false;
    }
 
    protected function sendSpawnPacket(Player $player) : void{
        $player->getNetworkSession()->sendDataPacket(AddPaintingPacket::create(
            $this->getId(), //TODO: entity unique ID
            $this->getId(),
            new Vector3(
                ($this->boundingBox->minX + $this->boundingBox->maxX) / 2,
                ($this->boundingBox->minY + $this->boundingBox->maxY) / 2,
                ($this->boundingBox->minZ + $this->boundingBox->maxZ) / 2
            ),
            self::FACING_TO_DATA[$this->facing],
            $this->motive->getName()
        ));
    }
 
    public function getPickedItem() : ?Item{
        return VanillaItems::PAINTING();
    }
 
    public function getMotive() : PaintingMotive{
        return $this->motive;
    }
 
    public function getFacing() : int{
        return $this->facing;
    }
 
    private static function getPaintingBB(int $facing, PaintingMotive $motive) : AxisAlignedBB{
        $width = $motive->getWidth();
        $height = $motive->getHeight();
 
        $horizontalStart = (int) (ceil($width / 2) - 1);
        $verticalStart = (int) (ceil($height / 2) - 1);
 
        return AxisAlignedBB::one()
            ->trim($facing, 15 / 16)
            ->extend(Facing::rotateY($facing, true), $horizontalStart)
            ->extend(Facing::rotateY($facing, false), -$horizontalStart + $width - 1)
            ->extend(Facing::DOWN, $verticalStart)
            ->extend(Facing::UP, -$verticalStart + $height - 1);
    }
 
    public static function canFit(World $world, Vector3 $blockIn, int $facing, bool $checkOverlap, PaintingMotive $motive) : bool{
        $width = $motive->getWidth();
        $height = $motive->getHeight();
 
        $horizontalStart = (int) (ceil($width / 2) - 1);
        $verticalStart = (int) (ceil($height / 2) - 1);
 
        $rotatedFace = Facing::rotateY($facing, false);
 
        $oppositeSide = Facing::opposite($facing);
 
        $startPos = $blockIn->asVector3()->getSide(Facing::opposite($rotatedFace), $horizontalStart)->getSide(Facing::DOWN, $verticalStart);
 
        for($w = 0; $w < $width; ++$w){
            for($h = 0; $h < $height; ++$h){
                $pos = $startPos->getSide($rotatedFace, $w)->getSide(Facing::UP, $h);
 
                $block = $world->getBlockAt($pos->x, $pos->y, $pos->z);
                if($block->isSolid() || !$block->getSide($oppositeSide)->isSolid()){
                    return false;
                }
            }
        }
 
        if($checkOverlap){
            $bb = self::getPaintingBB($facing, $motive)->offset($blockIn->x, $blockIn->y, $blockIn->z);
 
            foreach($world->getNearbyEntities($bb) as $entity){
                if($entity instanceof self){
                    return false;
                }
            }
        }
 
        return true;
    }
}