001 package net.minecraft.src; 002 003 import java.util.HashMap; 004 import java.util.Iterator; 005 import java.util.List; 006 import java.util.Map; 007 import java.util.Random; 008 009 public abstract class MapGenStructure extends MapGenBase 010 { 011 protected Map field_75053_d = new HashMap(); 012 013 /** 014 * Recursively called by generate() (generate) and optionally by itself. 015 */ 016 protected void recursiveGenerate(World par1World, int par2, int par3, int par4, int par5, byte[] par6ArrayOfByte) 017 { 018 if (!this.field_75053_d.containsKey(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(par2, par3)))) 019 { 020 this.rand.nextInt(); 021 022 if (this.canSpawnStructureAtCoords(par2, par3)) 023 { 024 StructureStart var7 = this.getStructureStart(par2, par3); 025 this.field_75053_d.put(Long.valueOf(ChunkCoordIntPair.chunkXZ2Int(par2, par3)), var7); 026 } 027 } 028 } 029 030 /** 031 * Generates structures in specified chunk next to existing structures. Does *not* generate StructureStarts. 032 */ 033 public boolean generateStructuresInChunk(World par1World, Random par2Random, int par3, int par4) 034 { 035 int var5 = (par3 << 4) + 8; 036 int var6 = (par4 << 4) + 8; 037 boolean var7 = false; 038 Iterator var8 = this.field_75053_d.values().iterator(); 039 040 while (var8.hasNext()) 041 { 042 StructureStart var9 = (StructureStart)var8.next(); 043 044 if (var9.isSizeableStructure() && var9.getBoundingBox().intersectsWith(var5, var6, var5 + 15, var6 + 15)) 045 { 046 var9.generateStructure(par1World, par2Random, new StructureBoundingBox(var5, var6, var5 + 15, var6 + 15)); 047 var7 = true; 048 } 049 } 050 051 return var7; 052 } 053 054 public boolean func_75048_a(int par1, int par2, int par3) 055 { 056 Iterator var4 = this.field_75053_d.values().iterator(); 057 058 while (var4.hasNext()) 059 { 060 StructureStart var5 = (StructureStart)var4.next(); 061 062 if (var5.isSizeableStructure() && var5.getBoundingBox().intersectsWith(par1, par3, par1, par3)) 063 { 064 Iterator var6 = var5.getComponents().iterator(); 065 066 while (var6.hasNext()) 067 { 068 StructureComponent var7 = (StructureComponent)var6.next(); 069 070 if (var7.getBoundingBox().isVecInside(par1, par2, par3)) 071 { 072 return true; 073 } 074 } 075 } 076 } 077 078 return false; 079 } 080 081 public ChunkPosition getNearestInstance(World par1World, int par2, int par3, int par4) 082 { 083 this.worldObj = par1World; 084 this.rand.setSeed(par1World.getSeed()); 085 long var5 = this.rand.nextLong(); 086 long var7 = this.rand.nextLong(); 087 long var9 = (long)(par2 >> 4) * var5; 088 long var11 = (long)(par4 >> 4) * var7; 089 this.rand.setSeed(var9 ^ var11 ^ par1World.getSeed()); 090 this.recursiveGenerate(par1World, par2 >> 4, par4 >> 4, 0, 0, (byte[])null); 091 double var13 = Double.MAX_VALUE; 092 ChunkPosition var15 = null; 093 Iterator var16 = this.field_75053_d.values().iterator(); 094 ChunkPosition var19; 095 int var21; 096 int var20; 097 double var23; 098 int var22; 099 100 while (var16.hasNext()) 101 { 102 StructureStart var17 = (StructureStart)var16.next(); 103 104 if (var17.isSizeableStructure()) 105 { 106 StructureComponent var18 = (StructureComponent)var17.getComponents().get(0); 107 var19 = var18.getCenter(); 108 var20 = var19.x - par2; 109 var21 = var19.y - par3; 110 var22 = var19.z - par4; 111 var23 = (double)(var20 + var20 * var21 * var21 + var22 * var22); 112 113 if (var23 < var13) 114 { 115 var13 = var23; 116 var15 = var19; 117 } 118 } 119 } 120 121 if (var15 != null) 122 { 123 return var15; 124 } 125 else 126 { 127 List var25 = this.func_75052_o_(); 128 129 if (var25 != null) 130 { 131 ChunkPosition var26 = null; 132 Iterator var27 = var25.iterator(); 133 134 while (var27.hasNext()) 135 { 136 var19 = (ChunkPosition)var27.next(); 137 var20 = var19.x - par2; 138 var21 = var19.y - par3; 139 var22 = var19.z - par4; 140 var23 = (double)(var20 + var20 * var21 * var21 + var22 * var22); 141 142 if (var23 < var13) 143 { 144 var13 = var23; 145 var26 = var19; 146 } 147 } 148 149 return var26; 150 } 151 else 152 { 153 return null; 154 } 155 } 156 } 157 158 protected List func_75052_o_() 159 { 160 return null; 161 } 162 163 protected abstract boolean canSpawnStructureAtCoords(int var1, int var2); 164 165 protected abstract StructureStart getStructureStart(int var1, int var2); 166 }