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populator/Tree.php
1 <?php
2 
3 /*
4  *
5  * ____ _ _ __ __ _ __ __ ____
6  * | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
7  * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
8  * | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
9  * |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
10  *
11  * This program is free software: you can redistribute it and/or modify
12  * it under the terms of the GNU Lesser General Public License as published by
13  * the Free Software Foundation, either version 3 of the License, or
14  * (at your option) any later version.
15  *
16  * @author PocketMine Team
17  * @link http://www.pocketmine.net/
18  *
19  *
20 */
21 
22 namespace pocketmine\level\generator\populator;
23 
29 
30 class Tree extends Populator{
32  private $level;
33  private $randomAmount;
34  private $baseAmount;
35 
36  public function setRandomAmount($amount){
37  $this->randomAmount = $amount;
38  }
39 
40  public function setBaseAmount($amount){
41  $this->baseAmount = $amount;
42  }
43 
44  public function populate(ChunkManager $level, $chunkX, $chunkZ, Random $random){
45  $this->level = $level;
46  $amount = $random->nextRange(0, $this->randomAmount + 1) + $this->baseAmount;
47  for($i = 0; $i < $amount; ++$i){
48  $x = $random->nextRange($chunkX << 4, ($chunkX << 4) + 15);
49  $z = $random->nextRange($chunkZ << 4, ($chunkZ << 4) + 15);
50  $y = $this->getHighestWorkableBlock($x, $z);
51  if($y === -1){
52  continue;
53  }
54  if($random->nextFloat() > 0.75){
55  $meta = Sapling::BIRCH;
56  }else{
57  $meta = Sapling::OAK;
58  }
59  ObjectTree::growTree($this->level, $x, $y, $z, $random, $meta);
60  }
61  }
62 
63  private function getHighestWorkableBlock($x, $z){
64  for($y = 128; $y > 0; --$y){
65  $b = $this->level->getBlockIdAt($x, $y, $z);
66  if($b !== Block::DIRT and $b !== Block::GRASS){
67  if(--$y <= 0){
68  return -1;
69  }
70  }else{
71  break;
72  }
73  }
74 
75  return ++$y;
76  }
77 }
nextRange($start=0, $end=0x7fffffff)
Definition: Random.php:112