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