WallHangingSign.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\block;
 
use pocketmine\block\utils\HorizontalFacing;
use pocketmine\block\utils\HorizontalFacingTrait;
use pocketmine\block\utils\SupportType;
use pocketmine\item\Item;
use pocketmine\math\Axis;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\world\BlockTransaction;
 
final class WallHangingSign extends BaseSign implements HorizontalFacing{
    use HorizontalFacingTrait;
 
    protected function getSupportingFace() : int{
        return Facing::rotateY($this->facing, clockwise: true);
    }
 
    public function onNearbyBlockChange() : void{
        //NOOP - disable default self-destruct behaviour
    }
 
    protected function recalculateCollisionBoxes() : array{
        //only the cross bar is collidable
        return [AxisAlignedBB::one()->trim(Facing::DOWN, 7 / 8)->squash(Facing::axis($this->facing), 3 / 4)];
    }
 
    public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
        if($player === null){
            return false;
        }
        $attachFace = Facing::axis($face) === Axis::Y ? Facing::rotateY($player->getHorizontalFacing(), clockwise: true) : $face;
 
        if($this->canBeSupportedAt($blockReplace->getSide($attachFace), $attachFace)){
            $direction = $attachFace;
        }elseif($this->canBeSupportedAt($blockReplace->getSide($opposite = Facing::opposite($attachFace)), $opposite)){
            $direction = $opposite;
        }else{
            return false;
        }
 
        $this->facing = Facing::rotateY(Facing::opposite($direction), clockwise: true);
        //the front should always face the player if possible
        if($this->facing === $player->getHorizontalFacing()){
            $this->facing = Facing::opposite($this->facing);
        }
 
        return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
    }
 
    private function canBeSupportedAt(Block $block, int $face) : bool{
        return
            ($block instanceof WallHangingSign && Facing::axis(Facing::rotateY($block->getFacing(), clockwise: true)) === Facing::axis($face)) ||
            $block->getSupportType(Facing::opposite($face)) === SupportType::FULL;
    }
}