001 package net.minecraft.world.gen;
002
003 import java.util.Random;
004 import net.minecraft.block.Block;
005 import net.minecraft.util.MathHelper;
006 import net.minecraft.world.World;
007
008 public class MapGenCavesHell extends MapGenBase
009 {
010 /**
011 * Generates a larger initial cave node than usual. Called 25% of the time.
012 */
013 protected void generateLargeCaveNode(int par1, int par2, byte[] par3ArrayOfByte, double par4, double par6, double par8)
014 {
015 this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, 1.0F + this.rand.nextFloat() * 6.0F, 0.0F, 0.0F, -1, -1, 0.5D);
016 }
017
018 /**
019 * Generates a node in the current cave system recursion tree.
020 */
021 protected void generateCaveNode(int par1, int par2, byte[] par3ArrayOfByte, double par4, double par6, double par8, float par10, float par11, float par12, int par13, int par14, double par15)
022 {
023 double var17 = (double)(par1 * 16 + 8);
024 double var19 = (double)(par2 * 16 + 8);
025 float var21 = 0.0F;
026 float var22 = 0.0F;
027 Random var23 = new Random(this.rand.nextLong());
028
029 if (par14 <= 0)
030 {
031 int var24 = this.range * 16 - 16;
032 par14 = var24 - var23.nextInt(var24 / 4);
033 }
034
035 boolean var51 = false;
036
037 if (par13 == -1)
038 {
039 par13 = par14 / 2;
040 var51 = true;
041 }
042
043 int var25 = var23.nextInt(par14 / 2) + par14 / 4;
044
045 for (boolean var26 = var23.nextInt(6) == 0; par13 < par14; ++par13)
046 {
047 double var27 = 1.5D + (double)(MathHelper.sin((float)par13 * (float)Math.PI / (float)par14) * par10 * 1.0F);
048 double var29 = var27 * par15;
049 float var31 = MathHelper.cos(par12);
050 float var32 = MathHelper.sin(par12);
051 par4 += (double)(MathHelper.cos(par11) * var31);
052 par6 += (double)var32;
053 par8 += (double)(MathHelper.sin(par11) * var31);
054
055 if (var26)
056 {
057 par12 *= 0.92F;
058 }
059 else
060 {
061 par12 *= 0.7F;
062 }
063
064 par12 += var22 * 0.1F;
065 par11 += var21 * 0.1F;
066 var22 *= 0.9F;
067 var21 *= 0.75F;
068 var22 += (var23.nextFloat() - var23.nextFloat()) * var23.nextFloat() * 2.0F;
069 var21 += (var23.nextFloat() - var23.nextFloat()) * var23.nextFloat() * 4.0F;
070
071 if (!var51 && par13 == var25 && par10 > 1.0F)
072 {
073 this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, var23.nextFloat() * 0.5F + 0.5F, par11 - ((float)Math.PI / 2F), par12 / 3.0F, par13, par14, 1.0D);
074 this.generateCaveNode(par1, par2, par3ArrayOfByte, par4, par6, par8, var23.nextFloat() * 0.5F + 0.5F, par11 + ((float)Math.PI / 2F), par12 / 3.0F, par13, par14, 1.0D);
075 return;
076 }
077
078 if (var51 || var23.nextInt(4) != 0)
079 {
080 double var33 = par4 - var17;
081 double var35 = par8 - var19;
082 double var37 = (double)(par14 - par13);
083 double var39 = (double)(par10 + 2.0F + 16.0F);
084
085 if (var33 * var33 + var35 * var35 - var37 * var37 > var39 * var39)
086 {
087 return;
088 }
089
090 if (par4 >= var17 - 16.0D - var27 * 2.0D && par8 >= var19 - 16.0D - var27 * 2.0D && par4 <= var17 + 16.0D + var27 * 2.0D && par8 <= var19 + 16.0D + var27 * 2.0D)
091 {
092 int var52 = MathHelper.floor_double(par4 - var27) - par1 * 16 - 1;
093 int var34 = MathHelper.floor_double(par4 + var27) - par1 * 16 + 1;
094 int var53 = MathHelper.floor_double(par6 - var29) - 1;
095 int var36 = MathHelper.floor_double(par6 + var29) + 1;
096 int var55 = MathHelper.floor_double(par8 - var27) - par2 * 16 - 1;
097 int var38 = MathHelper.floor_double(par8 + var27) - par2 * 16 + 1;
098
099 if (var52 < 0)
100 {
101 var52 = 0;
102 }
103
104 if (var34 > 16)
105 {
106 var34 = 16;
107 }
108
109 if (var53 < 1)
110 {
111 var53 = 1;
112 }
113
114 if (var36 > 120)
115 {
116 var36 = 120;
117 }
118
119 if (var55 < 0)
120 {
121 var55 = 0;
122 }
123
124 if (var38 > 16)
125 {
126 var38 = 16;
127 }
128
129 boolean var54 = false;
130 int var43;
131 int var40;
132
133 for (var40 = var52; !var54 && var40 < var34; ++var40)
134 {
135 for (int var41 = var55; !var54 && var41 < var38; ++var41)
136 {
137 for (int var42 = var36 + 1; !var54 && var42 >= var53 - 1; --var42)
138 {
139 var43 = (var40 * 16 + var41) * 128 + var42;
140
141 if (var42 >= 0 && var42 < 128)
142 {
143 if (par3ArrayOfByte[var43] == Block.lavaMoving.blockID || par3ArrayOfByte[var43] == Block.lavaStill.blockID)
144 {
145 var54 = true;
146 }
147
148 if (var42 != var53 - 1 && var40 != var52 && var40 != var34 - 1 && var41 != var55 && var41 != var38 - 1)
149 {
150 var42 = var53;
151 }
152 }
153 }
154 }
155 }
156
157 if (!var54)
158 {
159 for (var40 = var52; var40 < var34; ++var40)
160 {
161 double var56 = ((double)(var40 + par1 * 16) + 0.5D - par4) / var27;
162
163 for (var43 = var55; var43 < var38; ++var43)
164 {
165 double var44 = ((double)(var43 + par2 * 16) + 0.5D - par8) / var27;
166 int var46 = (var40 * 16 + var43) * 128 + var36;
167
168 for (int var47 = var36 - 1; var47 >= var53; --var47)
169 {
170 double var48 = ((double)var47 + 0.5D - par6) / var29;
171
172 if (var48 > -0.7D && var56 * var56 + var48 * var48 + var44 * var44 < 1.0D)
173 {
174 byte var50 = par3ArrayOfByte[var46];
175
176 if (var50 == Block.netherrack.blockID || var50 == Block.dirt.blockID || var50 == Block.grass.blockID)
177 {
178 par3ArrayOfByte[var46] = 0;
179 }
180 }
181
182 --var46;
183 }
184 }
185 }
186
187 if (var51)
188 {
189 break;
190 }
191 }
192 }
193 }
194 }
195 }
196
197 /**
198 * Recursively called by generate() (generate) and optionally by itself.
199 */
200 protected void recursiveGenerate(World par1World, int par2, int par3, int par4, int par5, byte[] par6ArrayOfByte)
201 {
202 int var7 = this.rand.nextInt(this.rand.nextInt(this.rand.nextInt(10) + 1) + 1);
203
204 if (this.rand.nextInt(5) != 0)
205 {
206 var7 = 0;
207 }
208
209 for (int var8 = 0; var8 < var7; ++var8)
210 {
211 double var9 = (double)(par2 * 16 + this.rand.nextInt(16));
212 double var11 = (double)this.rand.nextInt(128);
213 double var13 = (double)(par3 * 16 + this.rand.nextInt(16));
214 int var15 = 1;
215
216 if (this.rand.nextInt(4) == 0)
217 {
218 this.generateLargeCaveNode(par4, par5, par6ArrayOfByte, var9, var11, var13);
219 var15 += this.rand.nextInt(4);
220 }
221
222 for (int var16 = 0; var16 < var15; ++var16)
223 {
224 float var17 = this.rand.nextFloat() * (float)Math.PI * 2.0F;
225 float var18 = (this.rand.nextFloat() - 0.5F) * 2.0F / 8.0F;
226 float var19 = this.rand.nextFloat() * 2.0F + this.rand.nextFloat();
227 this.generateCaveNode(par4, par5, par6ArrayOfByte, var9, var11, var13, var19 * 2.0F, var17, var18, 0, 0, 0.5D);
228 }
229 }
230 }
231 }