mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-07-24 20:04:28 +00:00
400 lines
11 KiB
PHP
400 lines
11 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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namespace pocketmine\block;
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use pocketmine\block\utils\BlockDataSerializer;
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use pocketmine\block\utils\MinimumCostFlowCalculator;
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use pocketmine\block\utils\SupportType;
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use pocketmine\entity\Entity;
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use pocketmine\event\block\BlockFormEvent;
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use pocketmine\event\block\BlockSpreadEvent;
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use pocketmine\item\Item;
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use pocketmine\math\AxisAlignedBB;
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use pocketmine\math\Facing;
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use pocketmine\math\Vector3;
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use pocketmine\world\sound\FizzSound;
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use pocketmine\world\sound\Sound;
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use function lcg_value;
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abstract class Liquid extends Transparent{
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public const MAX_DECAY = 7;
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protected BlockIdentifierFlattened $idInfoFlattened;
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public int $adjacentSources = 0;
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protected ?Vector3 $flowVector = null;
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protected bool $falling = false;
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protected int $decay = 0; //PC "level" property
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protected bool $still = false;
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public function __construct(BlockIdentifierFlattened $idInfo, string $name, BlockBreakInfo $breakInfo){
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$this->idInfoFlattened = $idInfo;
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parent::__construct($idInfo, $name, $breakInfo);
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}
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public function getId() : int{
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return $this->still ? $this->idInfoFlattened->getSecondId() : parent::getId();
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}
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protected function writeStateToMeta() : int{
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return $this->decay | ($this->falling ? BlockLegacyMetadata::LIQUID_FLAG_FALLING : 0);
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}
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public function readStateFromData(int $id, int $stateMeta) : void{
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$this->decay = BlockDataSerializer::readBoundedInt("decay", $stateMeta & 0x07, 0, self::MAX_DECAY);
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$this->falling = ($stateMeta & BlockLegacyMetadata::LIQUID_FLAG_FALLING) !== 0;
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$this->still = $id === $this->idInfoFlattened->getSecondId();
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}
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public function getStateBitmask() : int{
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return 0b1111;
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}
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public function isFalling() : bool{ return $this->falling; }
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/** @return $this */
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public function setFalling(bool $falling) : self{
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$this->falling = $falling;
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return $this;
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}
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public function getDecay() : int{ return $this->decay; }
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/** @return $this */
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public function setDecay(int $decay) : self{
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if($decay < 0 || $decay > self::MAX_DECAY){
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throw new \InvalidArgumentException("Decay must be in range 0 ... " . self::MAX_DECAY);
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}
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$this->decay = $decay;
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return $this;
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}
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public function hasEntityCollision() : bool{
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return true;
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}
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public function canBeReplaced() : bool{
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return true;
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}
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public function canBeFlowedInto() : bool{
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return true;
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}
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public function isSolid() : bool{
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return false;
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}
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/**
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* @return AxisAlignedBB[]
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*/
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protected function recalculateCollisionBoxes() : array{
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return [];
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}
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public function getSupportType(int $facing) : SupportType{
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return SupportType::NONE();
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}
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public function getDropsForCompatibleTool(Item $item) : array{
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return [];
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}
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public function getStillForm() : Block{
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$b = clone $this;
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$b->still = true;
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return $b;
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}
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public function getFlowingForm() : Block{
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$b = clone $this;
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$b->still = false;
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return $b;
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}
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abstract public function getBucketFillSound() : Sound;
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abstract public function getBucketEmptySound() : Sound;
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public function isSource() : bool{
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return !$this->falling && $this->decay === 0;
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}
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/**
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* @return float
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*/
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public function getFluidHeightPercent(){
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return (($this->falling ? 0 : $this->decay) + 1) / 9;
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}
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public function isStill() : bool{
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return $this->still;
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}
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/**
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* @return $this
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*/
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public function setStill(bool $still = true) : self{
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$this->still = $still;
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return $this;
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}
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protected function getEffectiveFlowDecay(Block $block) : int{
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if(!($block instanceof Liquid) || !$block->isSameType($this)){
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return -1;
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}
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return $block->falling ? 0 : $block->decay;
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}
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public function readStateFromWorld() : void{
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parent::readStateFromWorld();
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$this->flowVector = null;
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}
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public function getFlowVector() : Vector3{
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if($this->flowVector !== null){
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return $this->flowVector;
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}
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$vX = $vY = $vZ = 0;
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$decay = $this->getEffectiveFlowDecay($this);
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$world = $this->position->getWorld();
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foreach(Facing::HORIZONTAL as $j){
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$x = $this->position->x;
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$y = $this->position->y;
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$z = $this->position->z;
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match($j){
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Facing::WEST => --$x,
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Facing::EAST => ++$x,
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Facing::NORTH => --$z,
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Facing::SOUTH => ++$z
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};
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$sideBlock = $world->getBlockAt($x, $y, $z);
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$blockDecay = $this->getEffectiveFlowDecay($sideBlock);
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if($blockDecay < 0){
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if(!$sideBlock->canBeFlowedInto()){
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continue;
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}
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$blockDecay = $this->getEffectiveFlowDecay($world->getBlockAt($x, $y - 1, $z));
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if($blockDecay >= 0){
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$realDecay = $blockDecay - ($decay - 8);
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$vX += ($x - $this->position->x) * $realDecay;
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$vY += ($y - $this->position->y) * $realDecay;
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$vZ += ($z - $this->position->z) * $realDecay;
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}
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continue;
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}else{
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$realDecay = $blockDecay - $decay;
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$vX += ($x - $this->position->x) * $realDecay;
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$vY += ($y - $this->position->y) * $realDecay;
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$vZ += ($z - $this->position->z) * $realDecay;
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}
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}
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$vector = new Vector3($vX, $vY, $vZ);
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if($this->falling){
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foreach(Facing::HORIZONTAL as $facing){
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$pos = $this->position->getSide($facing);
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if(
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!$this->canFlowInto($world->getBlockAt($pos->x, $pos->y, $pos->z)) ||
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!$this->canFlowInto($world->getBlockAt($pos->x, $pos->y + 1, $pos->z))
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){
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$vector = $vector->normalize()->add(0, -6, 0);
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break;
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}
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}
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}
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return $this->flowVector = $vector->normalize();
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}
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public function addVelocityToEntity(Entity $entity) : ?Vector3{
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if($entity->canBeMovedByCurrents()){
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return $this->getFlowVector();
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}
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return null;
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}
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abstract public function tickRate() : int;
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/**
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* Returns how many liquid levels are lost per block flowed horizontally. Affects how far the liquid can flow.
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*/
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public function getFlowDecayPerBlock() : int{
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return 1;
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}
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/**
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* Returns the number of source blocks of this liquid that must be horizontally adjacent to this block in order for
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* this block to become a source block itself, or null if the liquid does not exhibit source-forming behaviour.
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*/
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public function getMinAdjacentSourcesToFormSource() : ?int{
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return null;
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}
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public function onNearbyBlockChange() : void{
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if(!$this->checkForHarden()){
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$this->position->getWorld()->scheduleDelayedBlockUpdate($this->position, $this->tickRate());
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}
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}
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public function onScheduledUpdate() : void{
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$multiplier = $this->getFlowDecayPerBlock();
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$world = $this->position->getWorld();
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if(!$this->isSource()){
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$smallestFlowDecay = -100;
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$this->adjacentSources = 0;
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$smallestFlowDecay = $this->getSmallestFlowDecay($world->getBlockAt($this->position->x, $this->position->y, $this->position->z - 1), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($world->getBlockAt($this->position->x, $this->position->y, $this->position->z + 1), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($world->getBlockAt($this->position->x - 1, $this->position->y, $this->position->z), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($world->getBlockAt($this->position->x + 1, $this->position->y, $this->position->z), $smallestFlowDecay);
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$newDecay = $smallestFlowDecay + $multiplier;
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$falling = false;
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if($newDecay > self::MAX_DECAY || $smallestFlowDecay < 0){
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$newDecay = -1;
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}
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if($this->getEffectiveFlowDecay($world->getBlockAt($this->position->x, $this->position->y + 1, $this->position->z)) >= 0){
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$falling = true;
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}
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$minAdjacentSources = $this->getMinAdjacentSourcesToFormSource();
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if($minAdjacentSources !== null && $this->adjacentSources >= $minAdjacentSources){
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$bottomBlock = $world->getBlockAt($this->position->x, $this->position->y - 1, $this->position->z);
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if($bottomBlock->isSolid() || ($bottomBlock instanceof Liquid && $bottomBlock->isSameType($this) && $bottomBlock->isSource())){
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$newDecay = 0;
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$falling = false;
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}
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}
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if($falling !== $this->falling || (!$falling && $newDecay !== $this->decay)){
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if(!$falling && $newDecay < 0){
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$world->setBlock($this->position, VanillaBlocks::AIR());
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return;
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}
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$this->falling = $falling;
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$this->decay = $falling ? 0 : $newDecay;
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$world->setBlock($this->position, $this); //local block update will cause an update to be scheduled
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}
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}
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$bottomBlock = $world->getBlockAt($this->position->x, $this->position->y - 1, $this->position->z);
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$this->flowIntoBlock($bottomBlock, 0, true);
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if($this->isSource() || !$bottomBlock->canBeFlowedInto()){
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if($this->falling){
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$adjacentDecay = 1; //falling liquid behaves like source block
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}else{
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$adjacentDecay = $this->decay + $multiplier;
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}
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if($adjacentDecay <= self::MAX_DECAY){
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$calculator = new MinimumCostFlowCalculator($world, $this->getFlowDecayPerBlock(), \Closure::fromCallable([$this, 'canFlowInto']));
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foreach($calculator->getOptimalFlowDirections($this->position->getFloorX(), $this->position->getFloorY(), $this->position->getFloorZ()) as $facing){
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$this->flowIntoBlock($world->getBlock($this->position->getSide($facing)), $adjacentDecay, false);
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}
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}
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}
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$this->checkForHarden();
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}
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protected function flowIntoBlock(Block $block, int $newFlowDecay, bool $falling) : void{
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if($this->canFlowInto($block) && !($block instanceof Liquid)){
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$new = clone $this;
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$new->falling = $falling;
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$new->decay = $falling ? 0 : $newFlowDecay;
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$ev = new BlockSpreadEvent($block, $this, $new);
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$ev->call();
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if(!$ev->isCancelled()){
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$world = $this->position->getWorld();
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if($block->getId() !== BlockLegacyIds::AIR){
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$world->useBreakOn($block->position);
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}
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$world->setBlock($block->position, $ev->getNewState());
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}
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}
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}
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/** @phpstan-impure */
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private function getSmallestFlowDecay(Block $block, int $decay) : int{
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if(!($block instanceof Liquid) || !$block->isSameType($this)){
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return $decay;
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}
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$blockDecay = $block->decay;
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if($block->isSource()){
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++$this->adjacentSources;
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}elseif($block->falling){
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$blockDecay = 0;
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}
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return ($decay >= 0 && $blockDecay >= $decay) ? $decay : $blockDecay;
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}
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protected function checkForHarden() : bool{
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return false;
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}
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protected function liquidCollide(Block $cause, Block $result) : bool{
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$ev = new BlockFormEvent($this, $result);
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$ev->call();
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if(!$ev->isCancelled()){
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$world = $this->position->getWorld();
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$world->setBlock($this->position, $ev->getNewState());
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$world->addSound($this->position->add(0.5, 0.5, 0.5), new FizzSound(2.6 + (lcg_value() - lcg_value()) * 0.8));
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}
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return true;
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}
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protected function canFlowInto(Block $block) : bool{
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return
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$this->position->getWorld()->isInWorld($block->position->x, $block->position->y, $block->position->z) &&
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$block->canBeFlowedInto() &&
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!($block instanceof Liquid && $block->isSource()); //TODO: I think this should only be liquids of the same type
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}
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}
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