mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-07-30 14:38:36 +00:00
459 lines
12 KiB
PHP
459 lines
12 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\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\level\Level;
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use pocketmine\level\sound\FizzSound;
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use pocketmine\math\AxisAlignedBB;
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use pocketmine\math\Vector3;
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use function array_fill;
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use function intdiv;
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use function lcg_value;
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use function min;
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abstract class Liquid extends Transparent{
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/** @var int */
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public $adjacentSources = 0;
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/** @var Vector3|null */
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protected $flowVector = null;
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/** @var int[] */
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private $flowCostVisited = [];
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private const CAN_FLOW_DOWN = 1;
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private const CAN_FLOW = 0;
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private const BLOCKED = -1;
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public function hasEntityCollision() : bool{
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return true;
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}
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public function isBreakable(Item $item) : bool{
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return false;
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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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public function getHardness() : float{
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return 100;
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}
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protected function recalculateBoundingBox() : ?AxisAlignedBB{
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return null;
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}
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public function getDropsForCompatibleTool(Item $item) : array{
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return [];
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}
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abstract public function getStillForm() : Block;
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abstract public function getFlowingForm() : Block;
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abstract public function getBucketFillSound() : int;
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abstract public function getBucketEmptySound() : int;
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/**
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* @return float
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*/
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public function getFluidHeightPercent(){
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$d = $this->meta;
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if($d >= 8){
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$d = 0;
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}
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return ($d + 1) / 9;
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}
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protected function getFlowDecay(Block $block) : int{
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if($block->getId() !== $this->getId()){
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return -1;
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}
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return $block->getDamage();
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}
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protected function getEffectiveFlowDecay(Block $block) : int{
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if($block->getId() !== $this->getId()){
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return -1;
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}
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$decay = $block->getDamage();
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if($decay >= 8){
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$decay = 0;
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}
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return $decay;
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}
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public function clearCaches() : void{
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parent::clearCaches();
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$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 $this->flowVector;
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}
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$vector = new Vector3(0, 0, 0);
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$decay = $this->getEffectiveFlowDecay($this);
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for($j = 0; $j < 4; ++$j){
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$x = $this->x;
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$y = $this->y;
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$z = $this->z;
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if($j === 0){
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--$x;
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}elseif($j === 1){
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++$x;
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}elseif($j === 2){
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--$z;
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}elseif($j === 3){
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++$z;
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}
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$sideBlock = $this->level->getBlockAt($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 = $this->getEffectiveFlowDecay($this->level->getBlockAt($x, $y - 1, $z));
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if($blockDecay >= 0){
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$realDecay = $blockDecay - ($decay - 8);
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$vector->x += ($sideBlock->x - $this->x) * $realDecay;
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$vector->y += ($sideBlock->y - $this->y) * $realDecay;
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$vector->z += ($sideBlock->z - $this->z) * $realDecay;
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}
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continue;
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}else{
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$realDecay = $blockDecay - $decay;
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$vector->x += ($sideBlock->x - $this->x) * $realDecay;
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$vector->y += ($sideBlock->y - $this->y) * $realDecay;
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$vector->z += ($sideBlock->z - $this->z) * $realDecay;
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}
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}
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if($this->getDamage() >= 8){
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if(
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!$this->canFlowInto($this->level->getBlockAt($this->x, $this->y, $this->z - 1)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x, $this->y, $this->z + 1)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x - 1, $this->y, $this->z)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x + 1, $this->y, $this->z)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x, $this->y + 1, $this->z - 1)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x, $this->y + 1, $this->z + 1)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x - 1, $this->y + 1, $this->z)) or
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!$this->canFlowInto($this->level->getBlockAt($this->x + 1, $this->y + 1, $this->z))
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){
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$vector = $vector->normalize()->add(0, -6, 0);
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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 $vector) : void{
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if($entity->canBeMovedByCurrents()){
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$flow = $this->getFlowVector();
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$vector->x += $flow->x;
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$vector->y += $flow->y;
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$vector->z += $flow->z;
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}
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}
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abstract public function tickRate() : int;
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/**
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* Returns how many liquid levels are lost per block flowed horizontally. Affects how far the liquid can flow.
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*/
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public function getFlowDecayPerBlock() : int{
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return 1;
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}
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public function onNearbyBlockChange() : void{
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$this->checkForHarden();
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$this->level->scheduleDelayedBlockUpdate($this, $this->tickRate());
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}
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public function onScheduledUpdate() : void{
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$decay = $this->getFlowDecay($this);
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$multiplier = $this->getFlowDecayPerBlock();
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if($decay > 0){
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$smallestFlowDecay = -100;
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$this->adjacentSources = 0;
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$smallestFlowDecay = $this->getSmallestFlowDecay($this->level->getBlockAt($this->x, $this->y, $this->z - 1), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($this->level->getBlockAt($this->x, $this->y, $this->z + 1), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($this->level->getBlockAt($this->x - 1, $this->y, $this->z), $smallestFlowDecay);
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$smallestFlowDecay = $this->getSmallestFlowDecay($this->level->getBlockAt($this->x + 1, $this->y, $this->z), $smallestFlowDecay);
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$newDecay = $smallestFlowDecay + $multiplier;
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if($newDecay >= 8 or $smallestFlowDecay < 0){
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$newDecay = -1;
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}
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if(($topFlowDecay = $this->getFlowDecay($this->level->getBlockAt($this->x, $this->y + 1, $this->z))) >= 0){
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$newDecay = $topFlowDecay | 0x08;
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}
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if($this->adjacentSources >= 2 and $this instanceof Water){
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$bottomBlock = $this->level->getBlockAt($this->x, $this->y - 1, $this->z);
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if($bottomBlock->isSolid()){
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$newDecay = 0;
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}elseif($bottomBlock instanceof Water and $bottomBlock->getDamage() === 0){
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$newDecay = 0;
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}
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}
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if($newDecay !== $decay){
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$decay = $newDecay;
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if($decay < 0){
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$this->level->setBlock($this, BlockFactory::get(Block::AIR), true, true);
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}else{
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$this->level->setBlock($this, BlockFactory::get($this->id, $decay), true, true);
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$this->level->scheduleDelayedBlockUpdate($this, $this->tickRate());
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}
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}
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}
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if($decay >= 0){
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$bottomBlock = $this->level->getBlockAt($this->x, $this->y - 1, $this->z);
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$this->flowIntoBlock($bottomBlock, $decay | 0x08);
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if($decay === 0 or !$bottomBlock->canBeFlowedInto()){
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if($decay >= 8){
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$adjacentDecay = 1;
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}else{
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$adjacentDecay = $decay + $multiplier;
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}
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if($adjacentDecay < 8){
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$flags = $this->getOptimalFlowDirections();
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if($flags[0]){
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$this->flowIntoBlock($this->level->getBlockAt($this->x - 1, $this->y, $this->z), $adjacentDecay);
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}
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if($flags[1]){
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$this->flowIntoBlock($this->level->getBlockAt($this->x + 1, $this->y, $this->z), $adjacentDecay);
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}
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if($flags[2]){
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$this->flowIntoBlock($this->level->getBlockAt($this->x, $this->y, $this->z - 1), $adjacentDecay);
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}
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if($flags[3]){
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$this->flowIntoBlock($this->level->getBlockAt($this->x, $this->y, $this->z + 1), $adjacentDecay);
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}
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}
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}
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$this->checkForHarden();
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}
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}
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protected function flowIntoBlock(Block $block, int $newFlowDecay) : void{
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if($this->canFlowInto($block) and !($block instanceof Liquid)){
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$ev = new BlockSpreadEvent($block, $this, BlockFactory::get($this->getId(), $newFlowDecay));
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$ev->call();
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if(!$ev->isCancelled()){
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if($block->getId() > 0){
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$this->level->useBreakOn($block);
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}
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$this->level->setBlock($block, $ev->getNewState(), true, true);
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$this->level->scheduleDelayedBlockUpdate($block, $this->tickRate());
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}
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}
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}
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private function calculateFlowCost(int $blockX, int $blockY, int $blockZ, int $accumulatedCost, int $maxCost, int $originOpposite, int $lastOpposite) : int{
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$cost = 1000;
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for($j = 0; $j < 4; ++$j){
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if($j === $originOpposite or $j === $lastOpposite){
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continue;
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}
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$x = $blockX;
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$y = $blockY;
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$z = $blockZ;
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if($j === 0){
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--$x;
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}elseif($j === 1){
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++$x;
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}elseif($j === 2){
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--$z;
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}elseif($j === 3){
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++$z;
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}
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if(!isset($this->flowCostVisited[$hash = Level::blockHash($x, $y, $z)])){
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$blockSide = $this->level->getBlockAt($x, $y, $z);
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if(!$this->canFlowInto($blockSide)){
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$this->flowCostVisited[$hash] = self::BLOCKED;
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}elseif($this->level->getBlockAt($x, $y - 1, $z)->canBeFlowedInto()){
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$this->flowCostVisited[$hash] = self::CAN_FLOW_DOWN;
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}else{
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$this->flowCostVisited[$hash] = self::CAN_FLOW;
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}
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}
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$status = $this->flowCostVisited[$hash];
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if($status === self::BLOCKED){
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continue;
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}elseif($status === self::CAN_FLOW_DOWN){
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return $accumulatedCost;
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}
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if($accumulatedCost >= $maxCost){
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continue;
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}
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$realCost = $this->calculateFlowCost($x, $y, $z, $accumulatedCost + 1, $maxCost, $originOpposite, $j ^ 0x01);
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if($realCost < $cost){
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$cost = $realCost;
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}
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}
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return $cost;
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}
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/**
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* @return bool[]
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*/
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private function getOptimalFlowDirections() : array{
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$flowCost = array_fill(0, 4, 1000);
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$maxCost = intdiv(4, $this->getFlowDecayPerBlock());
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for($j = 0; $j < 4; ++$j){
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$x = $this->x;
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$y = $this->y;
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$z = $this->z;
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if($j === 0){
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--$x;
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}elseif($j === 1){
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++$x;
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}elseif($j === 2){
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--$z;
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}elseif($j === 3){
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++$z;
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}
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$block = $this->level->getBlockAt($x, $y, $z);
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if(!$this->canFlowInto($block)){
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$this->flowCostVisited[Level::blockHash($x, $y, $z)] = self::BLOCKED;
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continue;
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}elseif($this->level->getBlockAt($x, $y - 1, $z)->canBeFlowedInto()){
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$this->flowCostVisited[Level::blockHash($x, $y, $z)] = self::CAN_FLOW_DOWN;
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$flowCost[$j] = $maxCost = 0;
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}elseif($maxCost > 0){
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$this->flowCostVisited[Level::blockHash($x, $y, $z)] = self::CAN_FLOW;
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$flowCost[$j] = $this->calculateFlowCost($x, $y, $z, 1, $maxCost, $j ^ 0x01, $j ^ 0x01);
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$maxCost = min($maxCost, $flowCost[$j]);
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}
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}
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$this->flowCostVisited = [];
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$minCost = min($flowCost);
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$isOptimalFlowDirection = [];
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for($i = 0; $i < 4; ++$i){
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$isOptimalFlowDirection[$i] = ($flowCost[$i] === $minCost);
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}
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return $isOptimalFlowDirection;
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}
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/**
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* @phpstan-impure This function modifies the adjacent sources count (premature optimisation)
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*/
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private function getSmallestFlowDecay(Block $block, int $decay) : int{
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$blockDecay = $this->getFlowDecay($block);
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if($blockDecay < 0){
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return $decay;
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}elseif($blockDecay === 0){
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++$this->adjacentSources;
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}elseif($blockDecay >= 8){
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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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/**
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* @return void
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*/
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protected function checkForHarden(){
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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(!$ev->isCancelled()){
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$this->level->setBlock($this, $ev->getNewState(), true, true);
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$this->level->addSound(new FizzSound($this->add(0.5, 0.5, 0.5), 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 $block->canBeFlowedInto() and !($block instanceof Liquid and $block->meta === 0); //TODO: I think this should only be liquids of the same type
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}
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}
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